#include "aic79xx_inline.h"
#include <scsi/scsicam.h>
+static struct scsi_transport_template *ahd_linux_transport_template = NULL;
+
/*
* Include aiclib.c as part of our
* "module dependencies are hard" work around.
#include <linux/init.h> /* __setup */
#include <linux/mm.h> /* For fetching system memory size */
+#include <linux/blkdev.h> /* For block_size() */
#include <linux/delay.h> /* For ssleep/msleep */
/*
{AIC79XX_CONFIGED_TAG_COMMANDS}
};
-/*
- * By default, read streaming is disabled. In theory,
- * read streaming should enhance performance, but early
- * U320 drive firmware actually performs slower with
- * read streaming enabled.
- */
-#ifdef CONFIG_AIC79XX_ENABLE_RD_STRM
-#define AIC79XX_CONFIGED_RD_STRM 0xFFFF
-#else
-#define AIC79XX_CONFIGED_RD_STRM 0
-#endif
-
-static uint16_t aic79xx_rd_strm_info[] =
-{
- AIC79XX_CONFIGED_RD_STRM,
- AIC79XX_CONFIGED_RD_STRM,
- AIC79XX_CONFIGED_RD_STRM,
- AIC79XX_CONFIGED_RD_STRM,
- AIC79XX_CONFIGED_RD_STRM,
- AIC79XX_CONFIGED_RD_STRM,
- AIC79XX_CONFIGED_RD_STRM,
- AIC79XX_CONFIGED_RD_STRM,
- AIC79XX_CONFIGED_RD_STRM,
- AIC79XX_CONFIGED_RD_STRM,
- AIC79XX_CONFIGED_RD_STRM,
- AIC79XX_CONFIGED_RD_STRM,
- AIC79XX_CONFIGED_RD_STRM,
- AIC79XX_CONFIGED_RD_STRM,
- AIC79XX_CONFIGED_RD_STRM,
- AIC79XX_CONFIGED_RD_STRM
-};
-
-/*
- * DV option:
- *
- * positive value = DV Enabled
- * zero = DV Disabled
- * negative value = DV Default for adapter type/seeprom
- */
-#ifdef CONFIG_AIC79XX_DV_SETTING
-#define AIC79XX_CONFIGED_DV CONFIG_AIC79XX_DV_SETTING
-#else
-#define AIC79XX_CONFIGED_DV -1
-#endif
-
-static int8_t aic79xx_dv_settings[] =
-{
- AIC79XX_CONFIGED_DV,
- AIC79XX_CONFIGED_DV,
- AIC79XX_CONFIGED_DV,
- AIC79XX_CONFIGED_DV,
- AIC79XX_CONFIGED_DV,
- AIC79XX_CONFIGED_DV,
- AIC79XX_CONFIGED_DV,
- AIC79XX_CONFIGED_DV,
- AIC79XX_CONFIGED_DV,
- AIC79XX_CONFIGED_DV,
- AIC79XX_CONFIGED_DV,
- AIC79XX_CONFIGED_DV,
- AIC79XX_CONFIGED_DV,
- AIC79XX_CONFIGED_DV,
- AIC79XX_CONFIGED_DV,
- AIC79XX_CONFIGED_DV
-};
-
/*
* The I/O cell on the chip is very configurable in respect to its analog
* characteristics. Set the defaults here; they can be overriden with
MODULE_DESCRIPTION("Adaptec Aic790X U320 SCSI Host Bus Adapter driver");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_VERSION(AIC79XX_DRIVER_VERSION);
-module_param(aic79xx, charp, 0);
+module_param(aic79xx, charp, 0444);
MODULE_PARM_DESC(aic79xx,
"period delimited, options string.\n"
" verbose Enable verbose/diagnostic logging\n"
" reverse_scan Sort PCI devices highest Bus/Slot to lowest\n"
" tag_info:<tag_str> Set per-target tag depth\n"
" global_tag_depth:<int> Global tag depth for all targets on all buses\n"
-" rd_strm:<rd_strm_masks> Set per-target read streaming setting.\n"
-" dv:<dv_settings> Set per-controller Domain Validation Setting.\n"
" slewrate:<slewrate_list>Set the signal slew rate (0-15).\n"
" precomp:<pcomp_list> Set the signal precompensation (0-7).\n"
" amplitude:<int> Set the signal amplitude (0-7).\n"
" Shorten the selection timeout to 128ms\n"
"\n"
" options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n"
-"\n"
-" Sample /etc/modprobe.conf line:\n"
-" Change Read Streaming for Controller's 2 and 3\n"
-"\n"
-" options aic79xx 'aic79xx=rd_strm:{..0xFFF0.0xC0F0}'");
+"\n");
static void ahd_linux_handle_scsi_status(struct ahd_softc *,
- struct ahd_linux_device *,
+ struct scsi_device *,
struct scb *);
static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd,
- Scsi_Cmnd *cmd);
-static void ahd_linux_filter_inquiry(struct ahd_softc *ahd,
- struct ahd_devinfo *devinfo);
-static void ahd_linux_dev_timed_unfreeze(u_long arg);
+ struct scsi_cmnd *cmd);
static void ahd_linux_sem_timeout(u_long arg);
+static int ahd_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag);
static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd);
-static void ahd_linux_thread_run_complete_queue(struct ahd_softc *ahd);
-static void ahd_linux_start_dv(struct ahd_softc *ahd);
-static void ahd_linux_dv_timeout(struct scsi_cmnd *cmd);
-static int ahd_linux_dv_thread(void *data);
-static void ahd_linux_kill_dv_thread(struct ahd_softc *ahd);
-static void ahd_linux_dv_target(struct ahd_softc *ahd, u_int target);
-static void ahd_linux_dv_transition(struct ahd_softc *ahd,
- struct scsi_cmnd *cmd,
- struct ahd_devinfo *devinfo,
- struct ahd_linux_target *targ);
-static void ahd_linux_dv_fill_cmd(struct ahd_softc *ahd,
- struct scsi_cmnd *cmd,
- struct ahd_devinfo *devinfo);
-static void ahd_linux_dv_inq(struct ahd_softc *ahd,
- struct scsi_cmnd *cmd,
- struct ahd_devinfo *devinfo,
- struct ahd_linux_target *targ,
- u_int request_length);
-static void ahd_linux_dv_tur(struct ahd_softc *ahd,
- struct scsi_cmnd *cmd,
- struct ahd_devinfo *devinfo);
-static void ahd_linux_dv_rebd(struct ahd_softc *ahd,
- struct scsi_cmnd *cmd,
- struct ahd_devinfo *devinfo,
- struct ahd_linux_target *targ);
-static void ahd_linux_dv_web(struct ahd_softc *ahd,
- struct scsi_cmnd *cmd,
- struct ahd_devinfo *devinfo,
- struct ahd_linux_target *targ);
-static void ahd_linux_dv_reb(struct ahd_softc *ahd,
- struct scsi_cmnd *cmd,
- struct ahd_devinfo *devinfo,
- struct ahd_linux_target *targ);
-static void ahd_linux_dv_su(struct ahd_softc *ahd,
- struct scsi_cmnd *cmd,
- struct ahd_devinfo *devinfo,
- struct ahd_linux_target *targ);
-static int ahd_linux_fallback(struct ahd_softc *ahd,
- struct ahd_devinfo *devinfo);
-static __inline int ahd_linux_dv_fallback(struct ahd_softc *ahd,
- struct ahd_devinfo *devinfo);
-static void ahd_linux_dv_complete(Scsi_Cmnd *cmd);
-static void ahd_linux_generate_dv_pattern(struct ahd_linux_target *targ);
static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd,
struct ahd_devinfo *devinfo);
-static u_int ahd_linux_user_dv_setting(struct ahd_softc *ahd);
-static void ahd_linux_setup_user_rd_strm_settings(struct ahd_softc *ahd);
-static void ahd_linux_device_queue_depth(struct ahd_softc *ahd,
- struct ahd_linux_device *dev);
-static struct ahd_linux_target* ahd_linux_alloc_target(struct ahd_softc*,
- u_int, u_int);
-static void ahd_linux_free_target(struct ahd_softc*,
- struct ahd_linux_target*);
-static struct ahd_linux_device* ahd_linux_alloc_device(struct ahd_softc*,
- struct ahd_linux_target*,
- u_int);
-static void ahd_linux_free_device(struct ahd_softc*,
- struct ahd_linux_device*);
+static void ahd_linux_device_queue_depth(struct scsi_device *);
static int ahd_linux_run_command(struct ahd_softc*,
- struct ahd_linux_device*,
+ struct ahd_linux_device *,
struct scsi_cmnd *);
static void ahd_linux_setup_tag_info_global(char *p);
static aic_option_callback_t ahd_linux_setup_tag_info;
-static aic_option_callback_t ahd_linux_setup_rd_strm_info;
-static aic_option_callback_t ahd_linux_setup_dv;
static aic_option_callback_t ahd_linux_setup_iocell_info;
-static int ahd_linux_next_unit(void);
-static int aic79xx_setup(char *c);
+static int aic79xx_setup(char *c);
+static int ahd_linux_next_unit(void);
/****************************** Inlines ***************************************/
-static __inline void ahd_schedule_completeq(struct ahd_softc *ahd);
-static __inline struct ahd_linux_device*
- ahd_linux_get_device(struct ahd_softc *ahd, u_int channel,
- u_int target, u_int lun, int alloc);
-static struct ahd_cmd *ahd_linux_run_complete_queue(struct ahd_softc *ahd);
static __inline void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*);
-static __inline void
-ahd_schedule_completeq(struct ahd_softc *ahd)
-{
- if ((ahd->platform_data->flags & AHD_RUN_CMPLT_Q_TIMER) == 0) {
- ahd->platform_data->flags |= AHD_RUN_CMPLT_Q_TIMER;
- ahd->platform_data->completeq_timer.expires = jiffies;
- add_timer(&ahd->platform_data->completeq_timer);
- }
-}
-
-static __inline struct ahd_linux_device*
-ahd_linux_get_device(struct ahd_softc *ahd, u_int channel, u_int target,
- u_int lun, int alloc)
-{
- struct ahd_linux_target *targ;
- struct ahd_linux_device *dev;
- u_int target_offset;
-
- target_offset = target;
- if (channel != 0)
- target_offset += 8;
- targ = ahd->platform_data->targets[target_offset];
- if (targ == NULL) {
- if (alloc != 0) {
- targ = ahd_linux_alloc_target(ahd, channel, target);
- if (targ == NULL)
- return (NULL);
- } else
- return (NULL);
- }
- dev = targ->devices[lun];
- if (dev == NULL && alloc != 0)
- dev = ahd_linux_alloc_device(ahd, targ, lun);
- return (dev);
-}
-
-#define AHD_LINUX_MAX_RETURNED_ERRORS 4
-static struct ahd_cmd *
-ahd_linux_run_complete_queue(struct ahd_softc *ahd)
-{
- struct ahd_cmd *acmd;
- u_long done_flags;
- int with_errors;
-
- with_errors = 0;
- ahd_done_lock(ahd, &done_flags);
- while ((acmd = TAILQ_FIRST(&ahd->platform_data->completeq)) != NULL) {
- Scsi_Cmnd *cmd;
-
- if (with_errors > AHD_LINUX_MAX_RETURNED_ERRORS) {
- /*
- * Linux uses stack recursion to requeue
- * commands that need to be retried. Avoid
- * blowing out the stack by "spoon feeding"
- * commands that completed with error back
- * the operating system in case they are going
- * to be retried. "ick"
- */
- ahd_schedule_completeq(ahd);
- break;
- }
- TAILQ_REMOVE(&ahd->platform_data->completeq,
- acmd, acmd_links.tqe);
- cmd = &acmd_scsi_cmd(acmd);
- cmd->host_scribble = NULL;
- if (ahd_cmd_get_transaction_status(cmd) != DID_OK
- || (cmd->result & 0xFF) != SCSI_STATUS_OK)
- with_errors++;
-
- cmd->scsi_done(cmd);
- }
- ahd_done_unlock(ahd, &done_flags);
- return (acmd);
-}
-
static __inline void
ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb)
{
- Scsi_Cmnd *cmd;
+ struct scsi_cmnd *cmd;
int direction;
cmd = scb->io_ctx;
#define BUILD_SCSIID(ahd, cmd) \
((((cmd)->device->id << TID_SHIFT) & TID) | (ahd)->our_id)
-/************************ Host template entry points *************************/
-static int ahd_linux_detect(Scsi_Host_Template *);
-static const char *ahd_linux_info(struct Scsi_Host *);
-static int ahd_linux_queue(Scsi_Cmnd *, void (*)(Scsi_Cmnd *));
-static int ahd_linux_slave_alloc(Scsi_Device *);
-static int ahd_linux_slave_configure(Scsi_Device *);
-static void ahd_linux_slave_destroy(Scsi_Device *);
-#if defined(__i386__)
-static int ahd_linux_biosparam(struct scsi_device*,
- struct block_device*, sector_t, int[]);
-#endif
-static int ahd_linux_bus_reset(Scsi_Cmnd *);
-static int ahd_linux_dev_reset(Scsi_Cmnd *);
-static int ahd_linux_abort(Scsi_Cmnd *);
-
-
/*
* Try to detect an Adaptec 79XX controller.
*/
static int
-ahd_linux_detect(Scsi_Host_Template *template)
+ahd_linux_detect(struct scsi_host_template *template)
{
struct ahd_softc *ahd;
int found;
int error = 0;
- /*
- * Sanity checking of Linux SCSI data structures so
- * that some of our hacks^H^H^H^H^Hassumptions aren't
- * violated.
- */
- if (offsetof(struct ahd_cmd_internal, end)
- > offsetof(struct scsi_cmnd, host_scribble)) {
- printf("ahd_linux_detect: SCSI data structures changed.\n");
- printf("ahd_linux_detect: Unable to attach\n");
- return (0);
- }
-
-#ifdef MODULE
/*
* If we've been passed any parameters, process them now.
*/
if (aic79xx)
aic79xx_setup(aic79xx);
-#endif
template->proc_name = "aic79xx";
found++;
}
aic79xx_detect_complete++;
- return 0;
+ return found;
}
/*
* Queue an SCB to the controller.
*/
static int
-ahd_linux_queue(Scsi_Cmnd * cmd, void (*scsi_done) (Scsi_Cmnd *))
+ahd_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
{
struct ahd_softc *ahd;
- struct ahd_linux_device *dev;
+ struct ahd_linux_device *dev = scsi_transport_device_data(cmd->device);
ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
* DV commands through so long as we are only frozen to
* perform DV.
*/
- if (ahd->platform_data->qfrozen != 0
- && AHD_DV_CMD(cmd) == 0) {
+ if (ahd->platform_data->qfrozen != 0) {
printf("%s: queue frozen\n", ahd_name(ahd));
return SCSI_MLQUEUE_HOST_BUSY;
*/
cmd->scsi_done = scsi_done;
- dev = ahd_linux_get_device(ahd, cmd->device->channel,
- cmd->device->id, cmd->device->lun,
- /*alloc*/TRUE);
- BUG_ON(dev == NULL);
-
cmd->result = CAM_REQ_INPROG << 16;
return ahd_linux_run_command(ahd, dev, cmd);
}
+static inline struct scsi_target **
+ahd_linux_target_in_softc(struct scsi_target *starget)
+{
+ struct ahd_softc *ahd =
+ *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
+ unsigned int target_offset;
+
+ target_offset = starget->id;
+ if (starget->channel != 0)
+ target_offset += 8;
+
+ return &ahd->platform_data->starget[target_offset];
+}
+
static int
-ahd_linux_slave_alloc(Scsi_Device *device)
+ahd_linux_target_alloc(struct scsi_target *starget)
{
- struct ahd_softc *ahd;
+ struct ahd_softc *ahd =
+ *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
+ unsigned long flags;
+ struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
+ struct ahd_linux_target *targ = scsi_transport_target_data(starget);
+ struct ahd_devinfo devinfo;
+ struct ahd_initiator_tinfo *tinfo;
+ struct ahd_tmode_tstate *tstate;
+ char channel = starget->channel + 'A';
- ahd = *((struct ahd_softc **)device->host->hostdata);
- if (bootverbose)
- printf("%s: Slave Alloc %d\n", ahd_name(ahd), device->id);
- return (0);
+ ahd_lock(ahd, &flags);
+
+ BUG_ON(*ahd_targp != NULL);
+
+ *ahd_targp = starget;
+ memset(targ, 0, sizeof(*targ));
+
+ tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
+ starget->id, &tstate);
+ ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id,
+ CAM_LUN_WILDCARD, channel,
+ ROLE_INITIATOR);
+ spi_min_period(starget) = AHD_SYNCRATE_MAX; /* We can do U320 */
+ if ((ahd->bugs & AHD_PACED_NEGTABLE_BUG) != 0)
+ spi_max_offset(starget) = MAX_OFFSET_PACED_BUG;
+ else
+ spi_max_offset(starget) = MAX_OFFSET_PACED;
+ spi_max_width(starget) = ahd->features & AHD_WIDE;
+
+ ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
+ AHD_TRANS_GOAL, /*paused*/FALSE);
+ ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
+ AHD_TRANS_GOAL, /*paused*/FALSE);
+ ahd_unlock(ahd, &flags);
+
+ return 0;
+}
+
+static void
+ahd_linux_target_destroy(struct scsi_target *starget)
+{
+ struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
+
+ *ahd_targp = NULL;
}
static int
-ahd_linux_slave_configure(Scsi_Device *device)
+ahd_linux_slave_alloc(struct scsi_device *sdev)
{
- struct ahd_softc *ahd;
- struct ahd_linux_device *dev;
- u_long flags;
+ struct ahd_softc *ahd =
+ *((struct ahd_softc **)sdev->host->hostdata);
+ struct scsi_target *starget = sdev->sdev_target;
+ struct ahd_linux_target *targ = scsi_transport_target_data(starget);
+ struct ahd_linux_device *dev;
- ahd = *((struct ahd_softc **)device->host->hostdata);
if (bootverbose)
- printf("%s: Slave Configure %d\n", ahd_name(ahd), device->id);
- ahd_midlayer_entrypoint_lock(ahd, &flags);
+ printf("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id);
+
+ BUG_ON(targ->sdev[sdev->lun] != NULL);
+
+ dev = scsi_transport_device_data(sdev);
+ memset(dev, 0, sizeof(*dev));
+
+ /*
+ * We start out life using untagged
+ * transactions of which we allow one.
+ */
+ dev->openings = 1;
+
/*
- * Since Linux has attached to the device, configure
- * it so we don't free and allocate the device
- * structure on every command.
+ * Set maxtags to 0. This will be changed if we
+ * later determine that we are dealing with
+ * a tagged queuing capable device.
*/
- dev = ahd_linux_get_device(ahd, device->channel,
- device->id, device->lun,
- /*alloc*/TRUE);
- if (dev != NULL) {
- dev->flags &= ~AHD_DEV_UNCONFIGURED;
- dev->flags |= AHD_DEV_SLAVE_CONFIGURED;
- dev->scsi_device = device;
- ahd_linux_device_queue_depth(ahd, dev);
- }
- ahd_midlayer_entrypoint_unlock(ahd, &flags);
+ dev->maxtags = 0;
+
+ targ->sdev[sdev->lun] = sdev;
+
return (0);
}
+static int
+ahd_linux_slave_configure(struct scsi_device *sdev)
+{
+ struct ahd_softc *ahd;
+
+ ahd = *((struct ahd_softc **)sdev->host->hostdata);
+ if (bootverbose)
+ printf("%s: Slave Configure %d\n", ahd_name(ahd), sdev->id);
+
+ ahd_linux_device_queue_depth(sdev);
+
+ /* Initial Domain Validation */
+ if (!spi_initial_dv(sdev->sdev_target))
+ spi_dv_device(sdev);
+
+ return 0;
+}
+
static void
-ahd_linux_slave_destroy(Scsi_Device *device)
+ahd_linux_slave_destroy(struct scsi_device *sdev)
{
struct ahd_softc *ahd;
- struct ahd_linux_device *dev;
- u_long flags;
+ struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
+ struct ahd_linux_target *targ = scsi_transport_target_data(sdev->sdev_target);
- ahd = *((struct ahd_softc **)device->host->hostdata);
+ ahd = *((struct ahd_softc **)sdev->host->hostdata);
if (bootverbose)
- printf("%s: Slave Destroy %d\n", ahd_name(ahd), device->id);
- ahd_midlayer_entrypoint_lock(ahd, &flags);
- dev = ahd_linux_get_device(ahd, device->channel,
- device->id, device->lun,
- /*alloc*/FALSE);
+ printf("%s: Slave Destroy %d\n", ahd_name(ahd), sdev->id);
+
+ BUG_ON(dev->active);
+
+ targ->sdev[sdev->lun] = NULL;
- /*
- * Filter out "silly" deletions of real devices by only
- * deleting devices that have had slave_configure()
- * called on them. All other devices that have not
- * been configured will automatically be deleted by
- * the refcounting process.
- */
- if (dev != NULL
- && (dev->flags & AHD_DEV_SLAVE_CONFIGURED) != 0) {
- dev->flags |= AHD_DEV_UNCONFIGURED;
- if (dev->active == 0
- && (dev->flags & AHD_DEV_TIMER_ACTIVE) == 0)
- ahd_linux_free_device(ahd, dev);
- }
- ahd_midlayer_entrypoint_unlock(ahd, &flags);
}
#if defined(__i386__)
* Abort the current SCSI command(s).
*/
static int
-ahd_linux_abort(Scsi_Cmnd *cmd)
+ahd_linux_abort(struct scsi_cmnd *cmd)
+{
+ int error;
+
+ error = ahd_linux_queue_recovery_cmd(cmd, SCB_ABORT);
+ if (error != 0)
+ printf("aic79xx_abort returns 0x%x\n", error);
+ return error;
+}
+
+/*
+ * Attempt to send a target reset message to the device that timed out.
+ */
+static int
+ahd_linux_dev_reset(struct scsi_cmnd *cmd)
+{
+ int error;
+
+ error = ahd_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET);
+ if (error != 0)
+ printf("aic79xx_dev_reset returns 0x%x\n", error);
+ return error;
+}
+
+/*
+ * Reset the SCSI bus.
+ */
+static int
+ahd_linux_bus_reset(struct scsi_cmnd *cmd)
{
struct ahd_softc *ahd;
- struct ahd_cmd *acmd;
- struct ahd_linux_device *dev;
- struct scb *pending_scb;
u_long s;
- u_int saved_scbptr;
- u_int active_scbptr;
- u_int last_phase;
- u_int cdb_byte;
- int retval;
- int was_paused;
- int paused;
- int wait;
- int disconnected;
- ahd_mode_state saved_modes;
+ int found;
- pending_scb = NULL;
- paused = FALSE;
- wait = FALSE;
ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
- acmd = (struct ahd_cmd *)cmd;
+#ifdef AHD_DEBUG
+ if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
+ printf("%s: Bus reset called for cmd %p\n",
+ ahd_name(ahd), cmd);
+#endif
+ ahd_lock(ahd, &s);
+ found = ahd_reset_channel(ahd, cmd->device->channel + 'A',
+ /*initiate reset*/TRUE);
+ ahd_unlock(ahd, &s);
- printf("%s:%d:%d:%d: Attempting to abort cmd %p:",
- ahd_name(ahd), cmd->device->channel, cmd->device->id,
- cmd->device->lun, cmd);
- for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
- printf(" 0x%x", cmd->cmnd[cdb_byte]);
- printf("\n");
+ if (bootverbose)
+ printf("%s: SCSI bus reset delivered. "
+ "%d SCBs aborted.\n", ahd_name(ahd), found);
- /*
- * In all versions of Linux, we have to work around
- * a major flaw in how the mid-layer is locked down
- * if we are to sleep successfully in our error handler
- * while allowing our interrupt handler to run. Since
- * the midlayer acquires either the io_request_lock or
- * our lock prior to calling us, we must use the
- * spin_unlock_irq() method for unlocking our lock.
- * This will force interrupts to be enabled on the
- * current CPU. Since the EH thread should not have
- * been running with CPU interrupts disabled other than
- * by acquiring either the io_request_lock or our own
- * lock, this *should* be safe.
- */
- ahd_midlayer_entrypoint_lock(ahd, &s);
+ return (SUCCESS);
+}
- /*
- * First determine if we currently own this command.
- * Start by searching the device queue. If not found
- * there, check the pending_scb list. If not found
- * at all, and the system wanted us to just abort the
- * command, return success.
- */
- dev = ahd_linux_get_device(ahd, cmd->device->channel,
- cmd->device->id, cmd->device->lun,
- /*alloc*/FALSE);
+struct scsi_host_template aic79xx_driver_template = {
+ .module = THIS_MODULE,
+ .name = "aic79xx",
+ .proc_info = ahd_linux_proc_info,
+ .info = ahd_linux_info,
+ .queuecommand = ahd_linux_queue,
+ .eh_abort_handler = ahd_linux_abort,
+ .eh_device_reset_handler = ahd_linux_dev_reset,
+ .eh_bus_reset_handler = ahd_linux_bus_reset,
+#if defined(__i386__)
+ .bios_param = ahd_linux_biosparam,
+#endif
+ .can_queue = AHD_MAX_QUEUE,
+ .this_id = -1,
+ .cmd_per_lun = 2,
+ .use_clustering = ENABLE_CLUSTERING,
+ .slave_alloc = ahd_linux_slave_alloc,
+ .slave_configure = ahd_linux_slave_configure,
+ .slave_destroy = ahd_linux_slave_destroy,
+ .target_alloc = ahd_linux_target_alloc,
+ .target_destroy = ahd_linux_target_destroy,
+};
- if (dev == NULL) {
- /*
- * No target device for this command exists,
- * so we must not still own the command.
- */
- printf("%s:%d:%d:%d: Is not an active device\n",
- ahd_name(ahd), cmd->device->channel, cmd->device->id,
- cmd->device->lun);
- retval = SUCCESS;
- goto no_cmd;
- }
+/******************************** Bus DMA *************************************/
+int
+ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
+ bus_size_t alignment, bus_size_t boundary,
+ dma_addr_t lowaddr, dma_addr_t highaddr,
+ bus_dma_filter_t *filter, void *filterarg,
+ bus_size_t maxsize, int nsegments,
+ bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
+{
+ bus_dma_tag_t dmat;
+
+ dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
+ if (dmat == NULL)
+ return (ENOMEM);
/*
- * See if we can find a matching cmd in the pending list.
+ * Linux is very simplistic about DMA memory. For now don't
+ * maintain all specification information. Once Linux supplies
+ * better facilities for doing these operations, or the
+ * needs of this particular driver change, we might need to do
+ * more here.
*/
- LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
- if (pending_scb->io_ctx == cmd)
- break;
- }
+ dmat->alignment = alignment;
+ dmat->boundary = boundary;
+ dmat->maxsize = maxsize;
+ *ret_tag = dmat;
+ return (0);
+}
- if (pending_scb == NULL) {
- printf("%s:%d:%d:%d: Command not found\n",
- ahd_name(ahd), cmd->device->channel, cmd->device->id,
- cmd->device->lun);
- goto no_cmd;
- }
+void
+ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
+{
+ free(dmat, M_DEVBUF);
+}
- if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
- /*
- * We can't queue two recovery actions using the same SCB
- */
- retval = FAILED;
- goto done;
- }
+int
+ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
+ int flags, bus_dmamap_t *mapp)
+{
+ *vaddr = pci_alloc_consistent(ahd->dev_softc,
+ dmat->maxsize, mapp);
+ if (*vaddr == NULL)
+ return (ENOMEM);
+ return(0);
+}
+void
+ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
+ void* vaddr, bus_dmamap_t map)
+{
+ pci_free_consistent(ahd->dev_softc, dmat->maxsize,
+ vaddr, map);
+}
+
+int
+ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
+ void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
+ void *cb_arg, int flags)
+{
/*
- * Ensure that the card doesn't do anything
- * behind our back. Also make sure that we
- * didn't "just" miss an interrupt that would
- * affect this cmd.
+ * Assume for now that this will only be used during
+ * initialization and not for per-transaction buffer mapping.
*/
- was_paused = ahd_is_paused(ahd);
- ahd_pause_and_flushwork(ahd);
- paused = TRUE;
-
- if ((pending_scb->flags & SCB_ACTIVE) == 0) {
- printf("%s:%d:%d:%d: Command already completed\n",
- ahd_name(ahd), cmd->device->channel, cmd->device->id,
- cmd->device->lun);
- goto no_cmd;
- }
+ bus_dma_segment_t stack_sg;
- printf("%s: At time of recovery, card was %spaused\n",
- ahd_name(ahd), was_paused ? "" : "not ");
- ahd_dump_card_state(ahd);
+ stack_sg.ds_addr = map;
+ stack_sg.ds_len = dmat->maxsize;
+ cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
+ return (0);
+}
- disconnected = TRUE;
- if (ahd_search_qinfifo(ahd, cmd->device->id, cmd->device->channel + 'A',
- cmd->device->lun, SCB_GET_TAG(pending_scb),
- ROLE_INITIATOR, CAM_REQ_ABORTED,
- SEARCH_COMPLETE) > 0) {
- printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
- ahd_name(ahd), cmd->device->channel, cmd->device->id,
- cmd->device->lun);
- retval = SUCCESS;
- goto done;
- }
+void
+ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
+{
+}
- saved_modes = ahd_save_modes(ahd);
- ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
- last_phase = ahd_inb(ahd, LASTPHASE);
- saved_scbptr = ahd_get_scbptr(ahd);
- active_scbptr = saved_scbptr;
- if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
- struct scb *bus_scb;
+int
+ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
+{
+ /* Nothing to do */
+ return (0);
+}
- bus_scb = ahd_lookup_scb(ahd, active_scbptr);
- if (bus_scb == pending_scb)
- disconnected = FALSE;
- }
+/********************* Platform Dependent Functions ***************************/
+/*
+ * Compare "left hand" softc with "right hand" softc, returning:
+ * < 0 - lahd has a lower priority than rahd
+ * 0 - Softcs are equal
+ * > 0 - lahd has a higher priority than rahd
+ */
+int
+ahd_softc_comp(struct ahd_softc *lahd, struct ahd_softc *rahd)
+{
+ int value;
/*
- * At this point, pending_scb is the scb associated with the
- * passed in command. That command is currently active on the
- * bus or is in the disconnected state.
+ * Under Linux, cards are ordered as follows:
+ * 1) PCI devices that are marked as the boot controller.
+ * 2) PCI devices with BIOS enabled sorted by bus/slot/func.
+ * 3) All remaining PCI devices sorted by bus/slot/func.
*/
- if (last_phase != P_BUSFREE
- && SCB_GET_TAG(pending_scb) == active_scbptr) {
+#if 0
+ value = (lahd->flags & AHD_BOOT_CHANNEL)
+ - (rahd->flags & AHD_BOOT_CHANNEL);
+ if (value != 0)
+ /* Controllers set for boot have a *higher* priority */
+ return (value);
+#endif
- /*
- * We're active on the bus, so assert ATN
- * and hope that the target responds.
- */
- pending_scb = ahd_lookup_scb(ahd, active_scbptr);
- pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
- ahd_outb(ahd, MSG_OUT, HOST_MSG);
- ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
- printf("%s:%d:%d:%d: Device is active, asserting ATN\n",
- ahd_name(ahd), cmd->device->channel,
- cmd->device->id, cmd->device->lun);
- wait = TRUE;
- } else if (disconnected) {
+ value = (lahd->flags & AHD_BIOS_ENABLED)
+ - (rahd->flags & AHD_BIOS_ENABLED);
+ if (value != 0)
+ /* Controllers with BIOS enabled have a *higher* priority */
+ return (value);
- /*
- * Actually re-queue this SCB in an attempt
- * to select the device before it reconnects.
- */
- pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
- ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
- pending_scb->hscb->cdb_len = 0;
- pending_scb->hscb->task_attribute = 0;
- pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;
+ /* Still equal. Sort by bus/slot/func. */
+ if (aic79xx_reverse_scan != 0)
+ value = ahd_get_pci_bus(lahd->dev_softc)
+ - ahd_get_pci_bus(rahd->dev_softc);
+ else
+ value = ahd_get_pci_bus(rahd->dev_softc)
+ - ahd_get_pci_bus(lahd->dev_softc);
+ if (value != 0)
+ return (value);
+ if (aic79xx_reverse_scan != 0)
+ value = ahd_get_pci_slot(lahd->dev_softc)
+ - ahd_get_pci_slot(rahd->dev_softc);
+ else
+ value = ahd_get_pci_slot(rahd->dev_softc)
+ - ahd_get_pci_slot(lahd->dev_softc);
+ if (value != 0)
+ return (value);
- if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
- /*
- * Mark the SCB has having an outstanding
- * task management function. Should the command
- * complete normally before the task management
- * function can be sent, the host will be notified
- * to abort our requeued SCB.
- */
- ahd_outb(ahd, SCB_TASK_MANAGEMENT,
- pending_scb->hscb->task_management);
- } else {
- /*
- * If non-packetized, set the MK_MESSAGE control
- * bit indicating that we desire to send a message.
- * We also set the disconnected flag since there is
- * no guarantee that our SCB control byte matches
- * the version on the card. We don't want the
- * sequencer to abort the command thinking an
- * unsolicited reselection occurred.
- */
- pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
+ value = rahd->channel - lahd->channel;
+ return (value);
+}
- /*
- * The sequencer will never re-reference the
- * in-core SCB. To make sure we are notified
- * during reslection, set the MK_MESSAGE flag in
- * the card's copy of the SCB.
- */
- ahd_outb(ahd, SCB_CONTROL,
- ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
- }
+static void
+ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
+{
- /*
- * Clear out any entries in the QINFIFO first
- * so we are the next SCB for this target
- * to run.
- */
- ahd_search_qinfifo(ahd, cmd->device->id,
- cmd->device->channel + 'A', cmd->device->lun,
- SCB_LIST_NULL, ROLE_INITIATOR,
- CAM_REQUEUE_REQ, SEARCH_COMPLETE);
- ahd_qinfifo_requeue_tail(ahd, pending_scb);
- ahd_set_scbptr(ahd, saved_scbptr);
- ahd_print_path(ahd, pending_scb);
- printf("Device is disconnected, re-queuing SCB\n");
- wait = TRUE;
- } else {
- printf("%s:%d:%d:%d: Unable to deliver message\n",
- ahd_name(ahd), cmd->device->channel,
- cmd->device->id, cmd->device->lun);
- retval = FAILED;
- goto done;
+ if ((instance >= 0)
+ && (instance < NUM_ELEMENTS(aic79xx_iocell_info))) {
+ uint8_t *iocell_info;
+
+ iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
+ iocell_info[index] = value & 0xFFFF;
+ if (bootverbose)
+ printf("iocell[%d:%ld] = %d\n", instance, index, value);
}
+}
-no_cmd:
- /*
- * Our assumption is that if we don't have the command, no
- * recovery action was required, so we return success. Again,
- * the semantics of the mid-layer recovery engine are not
- * well defined, so this may change in time.
- */
- retval = SUCCESS;
-done:
- if (paused)
- ahd_unpause(ahd);
- if (wait) {
- struct timer_list timer;
- int ret;
+static void
+ahd_linux_setup_tag_info_global(char *p)
+{
+ int tags, i, j;
- pending_scb->platform_data->flags |= AHD_SCB_UP_EH_SEM;
- spin_unlock_irq(&ahd->platform_data->spin_lock);
- init_timer(&timer);
- timer.data = (u_long)pending_scb;
- timer.expires = jiffies + (5 * HZ);
- timer.function = ahd_linux_sem_timeout;
- add_timer(&timer);
- printf("Recovery code sleeping\n");
- down(&ahd->platform_data->eh_sem);
- printf("Recovery code awake\n");
- ret = del_timer_sync(&timer);
- if (ret == 0) {
- printf("Timer Expired\n");
- retval = FAILED;
+ tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
+ printf("Setting Global Tags= %d\n", tags);
+
+ for (i = 0; i < NUM_ELEMENTS(aic79xx_tag_info); i++) {
+ for (j = 0; j < AHD_NUM_TARGETS; j++) {
+ aic79xx_tag_info[i].tag_commands[j] = tags;
}
- spin_lock_irq(&ahd->platform_data->spin_lock);
}
- ahd_linux_run_complete_queue(ahd);
- ahd_midlayer_entrypoint_unlock(ahd, &s);
- return (retval);
}
-
static void
-ahd_linux_dev_reset_complete(Scsi_Cmnd *cmd)
+ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
{
- free(cmd, M_DEVBUF);
-}
-/*
- * Attempt to send a target reset message to the device that timed out.
- */
-static int
-ahd_linux_dev_reset(Scsi_Cmnd *cmd)
-{
- struct ahd_softc *ahd;
- struct scsi_cmnd *recovery_cmd;
- struct ahd_linux_device *dev;
- struct ahd_initiator_tinfo *tinfo;
- struct ahd_tmode_tstate *tstate;
- struct scb *scb;
- struct hardware_scb *hscb;
- u_long s;
- struct timer_list timer;
- int retval;
-
- ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
- recovery_cmd = malloc(sizeof(struct scsi_cmnd), M_DEVBUF, M_WAITOK);
- if (!recovery_cmd)
- return (FAILED);
- memset(recovery_cmd, 0, sizeof(struct scsi_cmnd));
- recovery_cmd->device = cmd->device;
- recovery_cmd->scsi_done = ahd_linux_dev_reset_complete;
-#ifdef AHD_DEBUG
- if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
- printf("%s:%d:%d:%d: Device reset called for cmd %p\n",
- ahd_name(ahd), cmd->device->channel, cmd->device->id,
- cmd->device->lun, cmd);
-#endif
- ahd_lock(ahd, &s);
-
- dev = ahd_linux_get_device(ahd, cmd->device->channel, cmd->device->id,
- cmd->device->lun, /*alloc*/FALSE);
- if (dev == NULL) {
- ahd_unlock(ahd, &s);
- kfree(recovery_cmd);
- return (FAILED);
- }
- if ((scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX)) == NULL) {
- ahd_unlock(ahd, &s);
- kfree(recovery_cmd);
- return (FAILED);
- }
- tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
- cmd->device->id, &tstate);
- recovery_cmd->result = CAM_REQ_INPROG << 16;
- recovery_cmd->host_scribble = (char *)scb;
- scb->io_ctx = recovery_cmd;
- scb->platform_data->dev = dev;
- scb->sg_count = 0;
- ahd_set_residual(scb, 0);
- ahd_set_sense_residual(scb, 0);
- hscb = scb->hscb;
- hscb->control = 0;
- hscb->scsiid = BUILD_SCSIID(ahd, cmd);
- hscb->lun = cmd->device->lun;
- hscb->cdb_len = 0;
- hscb->task_management = SIU_TASKMGMT_LUN_RESET;
- scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE;
- if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
- scb->flags |= SCB_PACKETIZED;
- } else {
- hscb->control |= MK_MESSAGE;
- }
- dev->openings--;
- dev->active++;
- dev->commands_issued++;
- LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
- ahd_queue_scb(ahd, scb);
-
- scb->platform_data->flags |= AHD_SCB_UP_EH_SEM;
- ahd_unlock(ahd, &s);
- init_timer(&timer);
- timer.data = (u_long)scb;
- timer.expires = jiffies + (5 * HZ);
- timer.function = ahd_linux_sem_timeout;
- add_timer(&timer);
- printf("Recovery code sleeping\n");
- down(&ahd->platform_data->eh_sem);
- printf("Recovery code awake\n");
- retval = SUCCESS;
- if (del_timer_sync(&timer) == 0) {
- printf("Timer Expired\n");
- retval = FAILED;
+ if ((instance >= 0) && (targ >= 0)
+ && (instance < NUM_ELEMENTS(aic79xx_tag_info))
+ && (targ < AHD_NUM_TARGETS)) {
+ aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
+ if (bootverbose)
+ printf("tag_info[%d:%d] = %d\n", instance, targ, value);
}
- ahd_lock(ahd, &s);
- ahd_linux_run_complete_queue(ahd);
- ahd_unlock(ahd, &s);
- printf("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval);
- return (retval);
}
/*
- * Reset the SCSI bus.
+ * Handle Linux boot parameters. This routine allows for assigning a value
+ * to a parameter with a ':' between the parameter and the value.
+ * ie. aic79xx=stpwlev:1,extended
*/
static int
-ahd_linux_bus_reset(Scsi_Cmnd *cmd)
+aic79xx_setup(char *s)
{
- struct ahd_softc *ahd;
- u_long s;
- int found;
+ int i, n;
+ char *p;
+ char *end;
- ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
+ static struct {
+ const char *name;
+ uint32_t *flag;
+ } options[] = {
+ { "extended", &aic79xx_extended },
+ { "no_reset", &aic79xx_no_reset },
+ { "verbose", &aic79xx_verbose },
+ { "allow_memio", &aic79xx_allow_memio},
#ifdef AHD_DEBUG
- if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
- printf("%s: Bus reset called for cmd %p\n",
- ahd_name(ahd), cmd);
+ { "debug", &ahd_debug },
#endif
- ahd_lock(ahd, &s);
- found = ahd_reset_channel(ahd, cmd->device->channel + 'A',
- /*initiate reset*/TRUE);
- ahd_linux_run_complete_queue(ahd);
- ahd_unlock(ahd, &s);
+ { "reverse_scan", &aic79xx_reverse_scan },
+ { "periodic_otag", &aic79xx_periodic_otag },
+ { "pci_parity", &aic79xx_pci_parity },
+ { "seltime", &aic79xx_seltime },
+ { "tag_info", NULL },
+ { "global_tag_depth", NULL},
+ { "slewrate", NULL },
+ { "precomp", NULL },
+ { "amplitude", NULL },
+ };
- if (bootverbose)
- printf("%s: SCSI bus reset delivered. "
- "%d SCBs aborted.\n", ahd_name(ahd), found);
+ end = strchr(s, '\0');
- return (SUCCESS);
+ /*
+ * XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS
+ * will never be 0 in this case.
+ */
+ n = 0;
+
+ while ((p = strsep(&s, ",.")) != NULL) {
+ if (*p == '\0')
+ continue;
+ for (i = 0; i < NUM_ELEMENTS(options); i++) {
+
+ n = strlen(options[i].name);
+ if (strncmp(options[i].name, p, n) == 0)
+ break;
+ }
+ if (i == NUM_ELEMENTS(options))
+ continue;
+
+ if (strncmp(p, "global_tag_depth", n) == 0) {
+ ahd_linux_setup_tag_info_global(p + n);
+ } else if (strncmp(p, "tag_info", n) == 0) {
+ s = aic_parse_brace_option("tag_info", p + n, end,
+ 2, ahd_linux_setup_tag_info, 0);
+ } else if (strncmp(p, "slewrate", n) == 0) {
+ s = aic_parse_brace_option("slewrate",
+ p + n, end, 1, ahd_linux_setup_iocell_info,
+ AIC79XX_SLEWRATE_INDEX);
+ } else if (strncmp(p, "precomp", n) == 0) {
+ s = aic_parse_brace_option("precomp",
+ p + n, end, 1, ahd_linux_setup_iocell_info,
+ AIC79XX_PRECOMP_INDEX);
+ } else if (strncmp(p, "amplitude", n) == 0) {
+ s = aic_parse_brace_option("amplitude",
+ p + n, end, 1, ahd_linux_setup_iocell_info,
+ AIC79XX_AMPLITUDE_INDEX);
+ } else if (p[n] == ':') {
+ *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
+ } else if (!strncmp(p, "verbose", n)) {
+ *(options[i].flag) = 1;
+ } else {
+ *(options[i].flag) ^= 0xFFFFFFFF;
+ }
+ }
+ return 1;
}
-Scsi_Host_Template aic79xx_driver_template = {
- .module = THIS_MODULE,
- .name = "aic79xx",
- .proc_info = ahd_linux_proc_info,
- .info = ahd_linux_info,
- .queuecommand = ahd_linux_queue,
- .eh_abort_handler = ahd_linux_abort,
- .eh_device_reset_handler = ahd_linux_dev_reset,
- .eh_bus_reset_handler = ahd_linux_bus_reset,
-#if defined(__i386__)
- .bios_param = ahd_linux_biosparam,
-#endif
- .can_queue = AHD_MAX_QUEUE,
- .this_id = -1,
- .cmd_per_lun = 2,
- .use_clustering = ENABLE_CLUSTERING,
- .slave_alloc = ahd_linux_slave_alloc,
- .slave_configure = ahd_linux_slave_configure,
- .slave_destroy = ahd_linux_slave_destroy,
-};
+__setup("aic79xx=", aic79xx_setup);
+
+uint32_t aic79xx_verbose;
-/******************************** Bus DMA *************************************/
int
-ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
- bus_size_t alignment, bus_size_t boundary,
- dma_addr_t lowaddr, dma_addr_t highaddr,
- bus_dma_filter_t *filter, void *filterarg,
- bus_size_t maxsize, int nsegments,
- bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
+ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template)
{
- bus_dma_tag_t dmat;
+ char buf[80];
+ struct Scsi_Host *host;
+ char *new_name;
+ u_long s;
- dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
- if (dmat == NULL)
+ template->name = ahd->description;
+ host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
+ if (host == NULL)
return (ENOMEM);
- /*
- * Linux is very simplistic about DMA memory. For now don't
- * maintain all specification information. Once Linux supplies
- * better facilities for doing these operations, or the
- * needs of this particular driver change, we might need to do
- * more here.
- */
- dmat->alignment = alignment;
- dmat->boundary = boundary;
- dmat->maxsize = maxsize;
- *ret_tag = dmat;
+ *((struct ahd_softc **)host->hostdata) = ahd;
+ ahd_lock(ahd, &s);
+ scsi_assign_lock(host, &ahd->platform_data->spin_lock);
+ ahd->platform_data->host = host;
+ host->can_queue = AHD_MAX_QUEUE;
+ host->cmd_per_lun = 2;
+ host->sg_tablesize = AHD_NSEG;
+ host->this_id = ahd->our_id;
+ host->irq = ahd->platform_data->irq;
+ host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;
+ host->max_lun = AHD_NUM_LUNS;
+ host->max_channel = 0;
+ host->sg_tablesize = AHD_NSEG;
+ ahd_set_unit(ahd, ahd_linux_next_unit());
+ sprintf(buf, "scsi%d", host->host_no);
+ new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
+ if (new_name != NULL) {
+ strcpy(new_name, buf);
+ ahd_set_name(ahd, new_name);
+ }
+ host->unique_id = ahd->unit;
+ ahd_linux_initialize_scsi_bus(ahd);
+ ahd_intr_enable(ahd, TRUE);
+ ahd_unlock(ahd, &s);
+
+ host->transportt = ahd_linux_transport_template;
+
+ scsi_add_host(host, &ahd->dev_softc->dev); /* XXX handle failure */
+ scsi_scan_host(host);
return (0);
}
-void
-ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
+uint64_t
+ahd_linux_get_memsize(void)
{
- free(dmat, M_DEVBUF);
+ struct sysinfo si;
+
+ si_meminfo(&si);
+ return ((uint64_t)si.totalram << PAGE_SHIFT);
}
-int
-ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
- int flags, bus_dmamap_t *mapp)
+/*
+ * Find the smallest available unit number to use
+ * for a new device. We don't just use a static
+ * count to handle the "repeated hot-(un)plug"
+ * scenario.
+ */
+static int
+ahd_linux_next_unit(void)
{
- bus_dmamap_t map;
+ struct ahd_softc *ahd;
+ int unit;
- map = malloc(sizeof(*map), M_DEVBUF, M_NOWAIT);
- if (map == NULL)
- return (ENOMEM);
- /*
- * Although we can dma data above 4GB, our
- * "consistent" memory is below 4GB for
- * space efficiency reasons (only need a 4byte
- * address). For this reason, we have to reset
- * our dma mask when doing allocations.
- */
- if (ahd->dev_softc != NULL)
- if (pci_set_dma_mask(ahd->dev_softc, 0xFFFFFFFF)) {
- printk(KERN_WARNING "aic79xx: No suitable DMA available.\n");
- kfree(map);
- return (ENODEV);
- }
- *vaddr = pci_alloc_consistent(ahd->dev_softc,
- dmat->maxsize, &map->bus_addr);
- if (ahd->dev_softc != NULL)
- if (pci_set_dma_mask(ahd->dev_softc,
- ahd->platform_data->hw_dma_mask)) {
- printk(KERN_WARNING "aic79xx: No suitable DMA available.\n");
- kfree(map);
- return (ENODEV);
+ unit = 0;
+retry:
+ TAILQ_FOREACH(ahd, &ahd_tailq, links) {
+ if (ahd->unit == unit) {
+ unit++;
+ goto retry;
}
- if (*vaddr == NULL)
- return (ENOMEM);
- *mapp = map;
- return(0);
+ }
+ return (unit);
}
-void
-ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
- void* vaddr, bus_dmamap_t map)
-{
- pci_free_consistent(ahd->dev_softc, dmat->maxsize,
- vaddr, map->bus_addr);
-}
-
-int
-ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
- void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
- void *cb_arg, int flags)
+/*
+ * Place the SCSI bus into a known state by either resetting it,
+ * or forcing transfer negotiations on the next command to any
+ * target.
+ */
+static void
+ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
{
- /*
- * Assume for now that this will only be used during
- * initialization and not for per-transaction buffer mapping.
- */
- bus_dma_segment_t stack_sg;
+ u_int target_id;
+ u_int numtarg;
- stack_sg.ds_addr = map->bus_addr;
- stack_sg.ds_len = dmat->maxsize;
- cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
- return (0);
-}
+ target_id = 0;
+ numtarg = 0;
+
+ if (aic79xx_no_reset != 0)
+ ahd->flags &= ~AHD_RESET_BUS_A;
+
+ if ((ahd->flags & AHD_RESET_BUS_A) != 0)
+ ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
+ else
+ numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
-void
-ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
-{
/*
- * The map may is NULL in our < 2.3.X implementation.
+ * Force negotiation to async for all targets that
+ * will not see an initial bus reset.
*/
- if (map != NULL)
- free(map, M_DEVBUF);
+ for (; target_id < numtarg; target_id++) {
+ struct ahd_devinfo devinfo;
+ struct ahd_initiator_tinfo *tinfo;
+ struct ahd_tmode_tstate *tstate;
+
+ tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
+ target_id, &tstate);
+ ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
+ CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
+ ahd_update_neg_request(ahd, &devinfo, tstate,
+ tinfo, AHD_NEG_ALWAYS);
+ }
+ /* Give the bus some time to recover */
+ if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
+ ahd_freeze_simq(ahd);
+ init_timer(&ahd->platform_data->reset_timer);
+ ahd->platform_data->reset_timer.data = (u_long)ahd;
+ ahd->platform_data->reset_timer.expires =
+ jiffies + (AIC79XX_RESET_DELAY * HZ)/1000;
+ ahd->platform_data->reset_timer.function =
+ (ahd_linux_callback_t *)ahd_release_simq;
+ add_timer(&ahd->platform_data->reset_timer);
+ }
}
int
-ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
+ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
{
- /* Nothing to do */
+ ahd->platform_data =
+ malloc(sizeof(struct ahd_platform_data), M_DEVBUF, M_NOWAIT);
+ if (ahd->platform_data == NULL)
+ return (ENOMEM);
+ memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data));
+ ahd->platform_data->irq = AHD_LINUX_NOIRQ;
+ ahd_lockinit(ahd);
+ init_MUTEX_LOCKED(&ahd->platform_data->eh_sem);
+ ahd->seltime = (aic79xx_seltime & 0x3) << 4;
return (0);
}
-/********************* Platform Dependent Functions ***************************/
-/*
- * Compare "left hand" softc with "right hand" softc, returning:
- * < 0 - lahd has a lower priority than rahd
- * 0 - Softcs are equal
- * > 0 - lahd has a higher priority than rahd
- */
-int
-ahd_softc_comp(struct ahd_softc *lahd, struct ahd_softc *rahd)
+void
+ahd_platform_free(struct ahd_softc *ahd)
{
- int value;
-
- /*
- * Under Linux, cards are ordered as follows:
- * 1) PCI devices that are marked as the boot controller.
- * 2) PCI devices with BIOS enabled sorted by bus/slot/func.
- * 3) All remaining PCI devices sorted by bus/slot/func.
- */
-#if 0
- value = (lahd->flags & AHD_BOOT_CHANNEL)
- - (rahd->flags & AHD_BOOT_CHANNEL);
- if (value != 0)
- /* Controllers set for boot have a *higher* priority */
- return (value);
-#endif
+ struct scsi_target *starget;
+ int i, j;
- value = (lahd->flags & AHD_BIOS_ENABLED)
- - (rahd->flags & AHD_BIOS_ENABLED);
- if (value != 0)
- /* Controllers with BIOS enabled have a *higher* priority */
- return (value);
+ if (ahd->platform_data != NULL) {
+ if (ahd->platform_data->host != NULL) {
+ scsi_remove_host(ahd->platform_data->host);
+ scsi_host_put(ahd->platform_data->host);
+ }
- /* Still equal. Sort by bus/slot/func. */
- if (aic79xx_reverse_scan != 0)
- value = ahd_get_pci_bus(lahd->dev_softc)
- - ahd_get_pci_bus(rahd->dev_softc);
- else
- value = ahd_get_pci_bus(rahd->dev_softc)
- - ahd_get_pci_bus(lahd->dev_softc);
- if (value != 0)
- return (value);
- if (aic79xx_reverse_scan != 0)
- value = ahd_get_pci_slot(lahd->dev_softc)
- - ahd_get_pci_slot(rahd->dev_softc);
- else
- value = ahd_get_pci_slot(rahd->dev_softc)
- - ahd_get_pci_slot(lahd->dev_softc);
- if (value != 0)
- return (value);
+ /* destroy all of the device and target objects */
+ for (i = 0; i < AHD_NUM_TARGETS; i++) {
+ starget = ahd->platform_data->starget[i];
+ if (starget != NULL) {
+ for (j = 0; j < AHD_NUM_LUNS; j++) {
+ struct ahd_linux_target *targ =
+ scsi_transport_target_data(starget);
+ if (targ->sdev[j] == NULL)
+ continue;
+ targ->sdev[j] = NULL;
+ }
+ ahd->platform_data->starget[i] = NULL;
+ }
+ }
- value = rahd->channel - lahd->channel;
- return (value);
+ if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
+ free_irq(ahd->platform_data->irq, ahd);
+ if (ahd->tags[0] == BUS_SPACE_PIO
+ && ahd->bshs[0].ioport != 0)
+ release_region(ahd->bshs[0].ioport, 256);
+ if (ahd->tags[1] == BUS_SPACE_PIO
+ && ahd->bshs[1].ioport != 0)
+ release_region(ahd->bshs[1].ioport, 256);
+ if (ahd->tags[0] == BUS_SPACE_MEMIO
+ && ahd->bshs[0].maddr != NULL) {
+ iounmap(ahd->bshs[0].maddr);
+ release_mem_region(ahd->platform_data->mem_busaddr,
+ 0x1000);
+ }
+ free(ahd->platform_data, M_DEVBUF);
+ }
}
-static void
-ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
+void
+ahd_platform_init(struct ahd_softc *ahd)
{
+ /*
+ * Lookup and commit any modified IO Cell options.
+ */
+ if (ahd->unit < NUM_ELEMENTS(aic79xx_iocell_info)) {
+ struct ahd_linux_iocell_opts *iocell_opts;
- if ((instance >= 0) && (targ >= 0)
- && (instance < NUM_ELEMENTS(aic79xx_tag_info))
- && (targ < AHD_NUM_TARGETS)) {
- aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
- if (bootverbose)
- printf("tag_info[%d:%d] = %d\n", instance, targ, value);
+ iocell_opts = &aic79xx_iocell_info[ahd->unit];
+ if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
+ AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
+ if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
+ AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
+ if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
+ AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
}
-}
-static void
-ahd_linux_setup_rd_strm_info(u_long arg, int instance, int targ, int32_t value)
-{
- if ((instance >= 0)
- && (instance < NUM_ELEMENTS(aic79xx_rd_strm_info))) {
- aic79xx_rd_strm_info[instance] = value & 0xFFFF;
- if (bootverbose)
- printf("rd_strm[%d] = 0x%x\n", instance, value);
- }
}
-static void
-ahd_linux_setup_dv(u_long arg, int instance, int targ, int32_t value)
+void
+ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
{
- if ((instance >= 0)
- && (instance < NUM_ELEMENTS(aic79xx_dv_settings))) {
- aic79xx_dv_settings[instance] = value;
- if (bootverbose)
- printf("dv[%d] = %d\n", instance, value);
- }
+ ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
+ SCB_GET_CHANNEL(ahd, scb),
+ SCB_GET_LUN(scb), SCB_LIST_NULL,
+ ROLE_UNKNOWN, CAM_REQUEUE_REQ);
}
-static void
-ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
+void
+ahd_platform_set_tags(struct ahd_softc *ahd, struct ahd_devinfo *devinfo,
+ ahd_queue_alg alg)
{
+ struct scsi_target *starget;
+ struct ahd_linux_target *targ;
+ struct ahd_linux_device *dev;
+ struct scsi_device *sdev;
+ int was_queuing;
+ int now_queuing;
- if ((instance >= 0)
- && (instance < NUM_ELEMENTS(aic79xx_iocell_info))) {
- uint8_t *iocell_info;
-
- iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
- iocell_info[index] = value & 0xFFFF;
- if (bootverbose)
- printf("iocell[%d:%ld] = %d\n", instance, index, value);
- }
-}
-
-static void
-ahd_linux_setup_tag_info_global(char *p)
-{
- int tags, i, j;
+ starget = ahd->platform_data->starget[devinfo->target];
+ targ = scsi_transport_target_data(starget);
+ BUG_ON(targ == NULL);
+ sdev = targ->sdev[devinfo->lun];
+ if (sdev == NULL)
+ return;
- tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
- printf("Setting Global Tags= %d\n", tags);
+ dev = scsi_transport_device_data(sdev);
- for (i = 0; i < NUM_ELEMENTS(aic79xx_tag_info); i++) {
- for (j = 0; j < AHD_NUM_TARGETS; j++) {
- aic79xx_tag_info[i].tag_commands[j] = tags;
- }
+ if (dev == NULL)
+ return;
+ was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
+ switch (alg) {
+ default:
+ case AHD_QUEUE_NONE:
+ now_queuing = 0;
+ break;
+ case AHD_QUEUE_BASIC:
+ now_queuing = AHD_DEV_Q_BASIC;
+ break;
+ case AHD_QUEUE_TAGGED:
+ now_queuing = AHD_DEV_Q_TAGGED;
+ break;
+ }
+ if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
+ && (was_queuing != now_queuing)
+ && (dev->active != 0)) {
+ dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
+ dev->qfrozen++;
}
-}
-/*
- * Handle Linux boot parameters. This routine allows for assigning a value
- * to a parameter with a ':' between the parameter and the value.
- * ie. aic79xx=stpwlev:1,extended
- */
-static int
-aic79xx_setup(char *s)
-{
- int i, n;
- char *p;
- char *end;
+ dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
+ if (now_queuing) {
+ u_int usertags;
- static struct {
- const char *name;
- uint32_t *flag;
- } options[] = {
- { "extended", &aic79xx_extended },
- { "no_reset", &aic79xx_no_reset },
- { "verbose", &aic79xx_verbose },
- { "allow_memio", &aic79xx_allow_memio},
-#ifdef AHD_DEBUG
- { "debug", &ahd_debug },
-#endif
- { "reverse_scan", &aic79xx_reverse_scan },
- { "periodic_otag", &aic79xx_periodic_otag },
- { "pci_parity", &aic79xx_pci_parity },
- { "seltime", &aic79xx_seltime },
- { "tag_info", NULL },
- { "global_tag_depth", NULL},
- { "rd_strm", NULL },
- { "dv", NULL },
- { "slewrate", NULL },
- { "precomp", NULL },
- { "amplitude", NULL },
- };
-
- end = strchr(s, '\0');
-
- /*
- * XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS
- * will never be 0 in this case.
- */
- n = 0;
-
- while ((p = strsep(&s, ",.")) != NULL) {
- if (*p == '\0')
- continue;
- for (i = 0; i < NUM_ELEMENTS(options); i++) {
-
- n = strlen(options[i].name);
- if (strncmp(options[i].name, p, n) == 0)
- break;
- }
- if (i == NUM_ELEMENTS(options))
- continue;
-
- if (strncmp(p, "global_tag_depth", n) == 0) {
- ahd_linux_setup_tag_info_global(p + n);
- } else if (strncmp(p, "tag_info", n) == 0) {
- s = aic_parse_brace_option("tag_info", p + n, end,
- 2, ahd_linux_setup_tag_info, 0);
- } else if (strncmp(p, "rd_strm", n) == 0) {
- s = aic_parse_brace_option("rd_strm", p + n, end,
- 1, ahd_linux_setup_rd_strm_info, 0);
- } else if (strncmp(p, "dv", n) == 0) {
- s = aic_parse_brace_option("dv", p + n, end, 1,
- ahd_linux_setup_dv, 0);
- } else if (strncmp(p, "slewrate", n) == 0) {
- s = aic_parse_brace_option("slewrate",
- p + n, end, 1, ahd_linux_setup_iocell_info,
- AIC79XX_SLEWRATE_INDEX);
- } else if (strncmp(p, "precomp", n) == 0) {
- s = aic_parse_brace_option("precomp",
- p + n, end, 1, ahd_linux_setup_iocell_info,
- AIC79XX_PRECOMP_INDEX);
- } else if (strncmp(p, "amplitude", n) == 0) {
- s = aic_parse_brace_option("amplitude",
- p + n, end, 1, ahd_linux_setup_iocell_info,
- AIC79XX_AMPLITUDE_INDEX);
- } else if (p[n] == ':') {
- *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
- } else if (!strncmp(p, "verbose", n)) {
- *(options[i].flag) = 1;
- } else {
- *(options[i].flag) ^= 0xFFFFFFFF;
+ usertags = ahd_linux_user_tagdepth(ahd, devinfo);
+ if (!was_queuing) {
+ /*
+ * Start out agressively and allow our
+ * dynamic queue depth algorithm to take
+ * care of the rest.
+ */
+ dev->maxtags = usertags;
+ dev->openings = dev->maxtags - dev->active;
}
+ if (dev->maxtags == 0) {
+ /*
+ * Queueing is disabled by the user.
+ */
+ dev->openings = 1;
+ } else if (alg == AHD_QUEUE_TAGGED) {
+ dev->flags |= AHD_DEV_Q_TAGGED;
+ if (aic79xx_periodic_otag != 0)
+ dev->flags |= AHD_DEV_PERIODIC_OTAG;
+ } else
+ dev->flags |= AHD_DEV_Q_BASIC;
+ } else {
+ /* We can only have one opening. */
+ dev->maxtags = 0;
+ dev->openings = 1 - dev->active;
}
- return 1;
-}
-
-__setup("aic79xx=", aic79xx_setup);
-
-uint32_t aic79xx_verbose;
-
-int
-ahd_linux_register_host(struct ahd_softc *ahd, Scsi_Host_Template *template)
-{
- char buf[80];
- struct Scsi_Host *host;
- char *new_name;
- u_long s;
- u_long target;
-
- template->name = ahd->description;
- host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
- if (host == NULL)
- return (ENOMEM);
-
- *((struct ahd_softc **)host->hostdata) = ahd;
- ahd_lock(ahd, &s);
- scsi_assign_lock(host, &ahd->platform_data->spin_lock);
- ahd->platform_data->host = host;
- host->can_queue = AHD_MAX_QUEUE;
- host->cmd_per_lun = 2;
- host->sg_tablesize = AHD_NSEG;
- host->this_id = ahd->our_id;
- host->irq = ahd->platform_data->irq;
- host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;
- host->max_lun = AHD_NUM_LUNS;
- host->max_channel = 0;
- host->sg_tablesize = AHD_NSEG;
- ahd_set_unit(ahd, ahd_linux_next_unit());
- sprintf(buf, "scsi%d", host->host_no);
- new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
- if (new_name != NULL) {
- strcpy(new_name, buf);
- ahd_set_name(ahd, new_name);
- }
- host->unique_id = ahd->unit;
- ahd_linux_setup_user_rd_strm_settings(ahd);
- ahd_linux_initialize_scsi_bus(ahd);
- ahd_unlock(ahd, &s);
- ahd->platform_data->dv_pid = kernel_thread(ahd_linux_dv_thread, ahd, 0);
- ahd_lock(ahd, &s);
- if (ahd->platform_data->dv_pid < 0) {
- printf("%s: Failed to create DV thread, error= %d\n",
- ahd_name(ahd), ahd->platform_data->dv_pid);
- return (-ahd->platform_data->dv_pid);
- }
- /*
- * Initially allocate *all* of our linux target objects
- * so that the DV thread will scan them all in parallel
- * just after driver initialization. Any device that
- * does not exist will have its target object destroyed
- * by the selection timeout handler. In the case of a
- * device that appears after the initial DV scan, async
- * negotiation will occur for the first command, and DV
- * will comence should that first command be successful.
- */
- for (target = 0; target < host->max_id; target++) {
+ switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
+ case AHD_DEV_Q_BASIC:
+ scsi_adjust_queue_depth(sdev,
+ MSG_SIMPLE_TASK,
+ dev->openings + dev->active);
+ break;
+ case AHD_DEV_Q_TAGGED:
+ scsi_adjust_queue_depth(sdev,
+ MSG_ORDERED_TASK,
+ dev->openings + dev->active);
+ break;
+ default:
/*
- * Skip our own ID. Some Compaq/HP storage devices
- * have enclosure management devices that respond to
- * single bit selection (i.e. selecting ourselves).
- * It is expected that either an external application
- * or a modified kernel will be used to probe this
- * ID if it is appropriate. To accommodate these
- * installations, ahc_linux_alloc_target() will allocate
- * for our ID if asked to do so.
+ * We allow the OS to queue 2 untagged transactions to
+ * us at any time even though we can only execute them
+ * serially on the controller/device. This should
+ * remove some latency.
*/
- if (target == ahd->our_id)
- continue;
-
- ahd_linux_alloc_target(ahd, 0, target);
+ scsi_adjust_queue_depth(sdev,
+ /*NON-TAGGED*/0,
+ /*queue depth*/2);
+ break;
}
- ahd_intr_enable(ahd, TRUE);
- ahd_linux_start_dv(ahd);
- ahd_unlock(ahd, &s);
-
- scsi_add_host(host, &ahd->dev_softc->dev); /* XXX handle failure */
- scsi_scan_host(host);
- return (0);
}
-uint64_t
-ahd_linux_get_memsize(void)
+int
+ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
+ int lun, u_int tag, role_t role, uint32_t status)
{
- struct sysinfo si;
-
- si_meminfo(&si);
- return ((uint64_t)si.totalram << PAGE_SHIFT);
+ return 0;
}
-/*
- * Find the smallest available unit number to use
- * for a new device. We don't just use a static
- * count to handle the "repeated hot-(un)plug"
- * scenario.
- */
-static int
-ahd_linux_next_unit(void)
+static u_int
+ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
{
- struct ahd_softc *ahd;
- int unit;
+ static int warned_user;
+ u_int tags;
- unit = 0;
-retry:
- TAILQ_FOREACH(ahd, &ahd_tailq, links) {
- if (ahd->unit == unit) {
- unit++;
- goto retry;
+ tags = 0;
+ if ((ahd->user_discenable & devinfo->target_mask) != 0) {
+ if (ahd->unit >= NUM_ELEMENTS(aic79xx_tag_info)) {
+
+ if (warned_user == 0) {
+ printf(KERN_WARNING
+"aic79xx: WARNING: Insufficient tag_info instances\n"
+"aic79xx: for installed controllers. Using defaults\n"
+"aic79xx: Please update the aic79xx_tag_info array in\n"
+"aic79xx: the aic79xx_osm.c source file.\n");
+ warned_user++;
+ }
+ tags = AHD_MAX_QUEUE;
+ } else {
+ adapter_tag_info_t *tag_info;
+
+ tag_info = &aic79xx_tag_info[ahd->unit];
+ tags = tag_info->tag_commands[devinfo->target_offset];
+ if (tags > AHD_MAX_QUEUE)
+ tags = AHD_MAX_QUEUE;
}
}
- return (unit);
+ return (tags);
}
/*
- * Place the SCSI bus into a known state by either resetting it,
- * or forcing transfer negotiations on the next command to any
- * target.
+ * Determines the queue depth for a given device.
*/
static void
-ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
+ahd_linux_device_queue_depth(struct scsi_device *sdev)
{
- u_int target_id;
- u_int numtarg;
+ struct ahd_devinfo devinfo;
+ u_int tags;
+ struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata);
- target_id = 0;
- numtarg = 0;
+ ahd_compile_devinfo(&devinfo,
+ ahd->our_id,
+ sdev->sdev_target->id, sdev->lun,
+ sdev->sdev_target->channel == 0 ? 'A' : 'B',
+ ROLE_INITIATOR);
+ tags = ahd_linux_user_tagdepth(ahd, &devinfo);
+ if (tags != 0 && sdev->tagged_supported != 0) {
- if (aic79xx_no_reset != 0)
- ahd->flags &= ~AHD_RESET_BUS_A;
+ ahd_set_tags(ahd, &devinfo, AHD_QUEUE_TAGGED);
+ ahd_print_devinfo(ahd, &devinfo);
+ printf("Tagged Queuing enabled. Depth %d\n", tags);
+ } else {
+ ahd_set_tags(ahd, &devinfo, AHD_QUEUE_NONE);
+ }
+}
- if ((ahd->flags & AHD_RESET_BUS_A) != 0)
- ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
- else
- numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
+static int
+ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
+ struct scsi_cmnd *cmd)
+{
+ struct scb *scb;
+ struct hardware_scb *hscb;
+ struct ahd_initiator_tinfo *tinfo;
+ struct ahd_tmode_tstate *tstate;
+ u_int col_idx;
+ uint16_t mask;
/*
- * Force negotiation to async for all targets that
- * will not see an initial bus reset.
+ * Get an scb to use.
*/
- for (; target_id < numtarg; target_id++) {
- struct ahd_devinfo devinfo;
- struct ahd_initiator_tinfo *tinfo;
- struct ahd_tmode_tstate *tstate;
-
- tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
- target_id, &tstate);
- ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
- CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
- ahd_update_neg_request(ahd, &devinfo, tstate,
- tinfo, AHD_NEG_ALWAYS);
- }
- /* Give the bus some time to recover */
- if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
- ahd_freeze_simq(ahd);
- init_timer(&ahd->platform_data->reset_timer);
- ahd->platform_data->reset_timer.data = (u_long)ahd;
- ahd->platform_data->reset_timer.expires =
- jiffies + (AIC79XX_RESET_DELAY * HZ)/1000;
- ahd->platform_data->reset_timer.function =
- (ahd_linux_callback_t *)ahd_release_simq;
- add_timer(&ahd->platform_data->reset_timer);
+ tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
+ cmd->device->id, &tstate);
+ if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
+ || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
+ col_idx = AHD_NEVER_COL_IDX;
+ } else {
+ col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
+ cmd->device->lun);
+ }
+ if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
+ ahd->flags |= AHD_RESOURCE_SHORTAGE;
+ return SCSI_MLQUEUE_HOST_BUSY;
}
-}
-int
-ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
-{
- ahd->platform_data =
- malloc(sizeof(struct ahd_platform_data), M_DEVBUF, M_NOWAIT);
- if (ahd->platform_data == NULL)
- return (ENOMEM);
- memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data));
- TAILQ_INIT(&ahd->platform_data->completeq);
- ahd->platform_data->irq = AHD_LINUX_NOIRQ;
- ahd->platform_data->hw_dma_mask = 0xFFFFFFFF;
- ahd_lockinit(ahd);
- ahd_done_lockinit(ahd);
- init_timer(&ahd->platform_data->completeq_timer);
- ahd->platform_data->completeq_timer.data = (u_long)ahd;
- ahd->platform_data->completeq_timer.function =
- (ahd_linux_callback_t *)ahd_linux_thread_run_complete_queue;
- init_MUTEX_LOCKED(&ahd->platform_data->eh_sem);
- init_MUTEX_LOCKED(&ahd->platform_data->dv_sem);
- init_MUTEX_LOCKED(&ahd->platform_data->dv_cmd_sem);
- ahd->seltime = (aic79xx_seltime & 0x3) << 4;
- return (0);
-}
+ scb->io_ctx = cmd;
+ scb->platform_data->dev = dev;
+ hscb = scb->hscb;
+ cmd->host_scribble = (char *)scb;
-void
-ahd_platform_free(struct ahd_softc *ahd)
-{
- struct ahd_linux_target *targ;
- struct ahd_linux_device *dev;
- int i, j;
+ /*
+ * Fill out basics of the HSCB.
+ */
+ hscb->control = 0;
+ hscb->scsiid = BUILD_SCSIID(ahd, cmd);
+ hscb->lun = cmd->device->lun;
+ scb->hscb->task_management = 0;
+ mask = SCB_GET_TARGET_MASK(ahd, scb);
- if (ahd->platform_data != NULL) {
- del_timer_sync(&ahd->platform_data->completeq_timer);
- ahd_linux_kill_dv_thread(ahd);
- if (ahd->platform_data->host != NULL) {
- scsi_remove_host(ahd->platform_data->host);
- scsi_host_put(ahd->platform_data->host);
- }
+ if ((ahd->user_discenable & mask) != 0)
+ hscb->control |= DISCENB;
- /* destroy all of the device and target objects */
- for (i = 0; i < AHD_NUM_TARGETS; i++) {
- targ = ahd->platform_data->targets[i];
- if (targ != NULL) {
- /* Keep target around through the loop. */
- targ->refcount++;
- for (j = 0; j < AHD_NUM_LUNS; j++) {
+ if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
+ scb->flags |= SCB_PACKETIZED;
- if (targ->devices[j] == NULL)
- continue;
- dev = targ->devices[j];
- ahd_linux_free_device(ahd, dev);
- }
- /*
- * Forcibly free the target now that
- * all devices are gone.
- */
- ahd_linux_free_target(ahd, targ);
- }
+ if ((tstate->auto_negotiate & mask) != 0) {
+ scb->flags |= SCB_AUTO_NEGOTIATE;
+ scb->hscb->control |= MK_MESSAGE;
+ }
+
+ if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
+ int msg_bytes;
+ uint8_t tag_msgs[2];
+
+ msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
+ if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
+ hscb->control |= tag_msgs[0];
+ if (tag_msgs[0] == MSG_ORDERED_TASK)
+ dev->commands_since_idle_or_otag = 0;
+ } else
+ if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
+ && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
+ hscb->control |= MSG_ORDERED_TASK;
+ dev->commands_since_idle_or_otag = 0;
+ } else {
+ hscb->control |= MSG_SIMPLE_TASK;
}
+ }
- if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
- free_irq(ahd->platform_data->irq, ahd);
- if (ahd->tags[0] == BUS_SPACE_PIO
- && ahd->bshs[0].ioport != 0)
- release_region(ahd->bshs[0].ioport, 256);
- if (ahd->tags[1] == BUS_SPACE_PIO
- && ahd->bshs[1].ioport != 0)
- release_region(ahd->bshs[1].ioport, 256);
- if (ahd->tags[0] == BUS_SPACE_MEMIO
- && ahd->bshs[0].maddr != NULL) {
- iounmap(ahd->bshs[0].maddr);
- release_mem_region(ahd->platform_data->mem_busaddr,
- 0x1000);
+ hscb->cdb_len = cmd->cmd_len;
+ memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
+
+ scb->platform_data->xfer_len = 0;
+ ahd_set_residual(scb, 0);
+ ahd_set_sense_residual(scb, 0);
+ scb->sg_count = 0;
+ if (cmd->use_sg != 0) {
+ void *sg;
+ struct scatterlist *cur_seg;
+ u_int nseg;
+ int dir;
+
+ cur_seg = (struct scatterlist *)cmd->request_buffer;
+ dir = cmd->sc_data_direction;
+ nseg = pci_map_sg(ahd->dev_softc, cur_seg,
+ cmd->use_sg, dir);
+ scb->platform_data->xfer_len = 0;
+ for (sg = scb->sg_list; nseg > 0; nseg--, cur_seg++) {
+ dma_addr_t addr;
+ bus_size_t len;
+
+ addr = sg_dma_address(cur_seg);
+ len = sg_dma_len(cur_seg);
+ scb->platform_data->xfer_len += len;
+ sg = ahd_sg_setup(ahd, scb, sg, addr, len,
+ /*last*/nseg == 1);
}
- free(ahd->platform_data, M_DEVBUF);
+ } else if (cmd->request_bufflen != 0) {
+ void *sg;
+ dma_addr_t addr;
+ int dir;
+
+ sg = scb->sg_list;
+ dir = cmd->sc_data_direction;
+ addr = pci_map_single(ahd->dev_softc,
+ cmd->request_buffer,
+ cmd->request_bufflen, dir);
+ scb->platform_data->xfer_len = cmd->request_bufflen;
+ scb->platform_data->buf_busaddr = addr;
+ sg = ahd_sg_setup(ahd, scb, sg, addr,
+ cmd->request_bufflen, /*last*/TRUE);
}
+
+ LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
+ dev->openings--;
+ dev->active++;
+ dev->commands_issued++;
+
+ if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
+ dev->commands_since_idle_or_otag++;
+ scb->flags |= SCB_ACTIVE;
+ ahd_queue_scb(ahd, scb);
+
+ return 0;
}
-void
-ahd_platform_init(struct ahd_softc *ahd)
+/*
+ * SCSI controller interrupt handler.
+ */
+irqreturn_t
+ahd_linux_isr(int irq, void *dev_id, struct pt_regs * regs)
{
- /*
- * Lookup and commit any modified IO Cell options.
- */
- if (ahd->unit < NUM_ELEMENTS(aic79xx_iocell_info)) {
- struct ahd_linux_iocell_opts *iocell_opts;
-
- iocell_opts = &aic79xx_iocell_info[ahd->unit];
- if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
- AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
- if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
- AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
- if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
- AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
- }
+ struct ahd_softc *ahd;
+ u_long flags;
+ int ours;
+ ahd = (struct ahd_softc *) dev_id;
+ ahd_lock(ahd, &flags);
+ ours = ahd_intr(ahd);
+ ahd_unlock(ahd, &flags);
+ return IRQ_RETVAL(ours);
}
void
-ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
+ahd_platform_flushwork(struct ahd_softc *ahd)
{
- ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
- SCB_GET_CHANNEL(ahd, scb),
- SCB_GET_LUN(scb), SCB_LIST_NULL,
- ROLE_UNKNOWN, CAM_REQUEUE_REQ);
+
}
void
-ahd_platform_set_tags(struct ahd_softc *ahd, struct ahd_devinfo *devinfo,
- ahd_queue_alg alg)
+ahd_send_async(struct ahd_softc *ahd, char channel,
+ u_int target, u_int lun, ac_code code, void *arg)
{
- struct ahd_linux_device *dev;
- int was_queuing;
- int now_queuing;
+ switch (code) {
+ case AC_TRANSFER_NEG:
+ {
+ char buf[80];
+ struct scsi_target *starget;
+ struct ahd_linux_target *targ;
+ struct info_str info;
+ struct ahd_initiator_tinfo *tinfo;
+ struct ahd_tmode_tstate *tstate;
+ unsigned int target_ppr_options;
- dev = ahd_linux_get_device(ahd, devinfo->channel - 'A',
- devinfo->target,
- devinfo->lun, /*alloc*/FALSE);
- if (dev == NULL)
- return;
- was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
- switch (alg) {
- default:
- case AHD_QUEUE_NONE:
- now_queuing = 0;
- break;
- case AHD_QUEUE_BASIC:
- now_queuing = AHD_DEV_Q_BASIC;
+ BUG_ON(target == CAM_TARGET_WILDCARD);
+
+ info.buffer = buf;
+ info.length = sizeof(buf);
+ info.offset = 0;
+ info.pos = 0;
+ tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
+ target, &tstate);
+
+ /*
+ * Don't bother reporting results while
+ * negotiations are still pending.
+ */
+ if (tinfo->curr.period != tinfo->goal.period
+ || tinfo->curr.width != tinfo->goal.width
+ || tinfo->curr.offset != tinfo->goal.offset
+ || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
+ if (bootverbose == 0)
+ break;
+
+ /*
+ * Don't bother reporting results that
+ * are identical to those last reported.
+ */
+ starget = ahd->platform_data->starget[target];
+ targ = scsi_transport_target_data(starget);
+ if (targ == NULL)
+ break;
+
+ target_ppr_options =
+ (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
+ + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
+ + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0);
+
+ if (tinfo->curr.period == spi_period(starget)
+ && tinfo->curr.width == spi_width(starget)
+ && tinfo->curr.offset == spi_offset(starget)
+ && tinfo->curr.ppr_options == target_ppr_options)
+ if (bootverbose == 0)
+ break;
+
+ spi_period(starget) = tinfo->curr.period;
+ spi_width(starget) = tinfo->curr.width;
+ spi_offset(starget) = tinfo->curr.offset;
+ spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ;
+ spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ;
+ spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ;
+ spi_display_xfer_agreement(starget);
break;
- case AHD_QUEUE_TAGGED:
- now_queuing = AHD_DEV_Q_TAGGED;
+ }
+ case AC_SENT_BDR:
+ {
+ WARN_ON(lun != CAM_LUN_WILDCARD);
+ scsi_report_device_reset(ahd->platform_data->host,
+ channel - 'A', target);
break;
}
- if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
- && (was_queuing != now_queuing)
- && (dev->active != 0)) {
- dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
- dev->qfrozen++;
- }
-
- dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
- if (now_queuing) {
- u_int usertags;
-
- usertags = ahd_linux_user_tagdepth(ahd, devinfo);
- if (!was_queuing) {
- /*
- * Start out agressively and allow our
- * dynamic queue depth algorithm to take
- * care of the rest.
- */
- dev->maxtags = usertags;
- dev->openings = dev->maxtags - dev->active;
- }
- if (dev->maxtags == 0) {
- /*
- * Queueing is disabled by the user.
- */
- dev->openings = 1;
- } else if (alg == AHD_QUEUE_TAGGED) {
- dev->flags |= AHD_DEV_Q_TAGGED;
- if (aic79xx_periodic_otag != 0)
- dev->flags |= AHD_DEV_PERIODIC_OTAG;
- } else
- dev->flags |= AHD_DEV_Q_BASIC;
- } else {
- /* We can only have one opening. */
- dev->maxtags = 0;
- dev->openings = 1 - dev->active;
- }
-
- if (dev->scsi_device != NULL) {
- switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
- case AHD_DEV_Q_BASIC:
- scsi_adjust_queue_depth(dev->scsi_device,
- MSG_SIMPLE_TASK,
- dev->openings + dev->active);
- break;
- case AHD_DEV_Q_TAGGED:
- scsi_adjust_queue_depth(dev->scsi_device,
- MSG_ORDERED_TASK,
- dev->openings + dev->active);
- break;
- default:
- /*
- * We allow the OS to queue 2 untagged transactions to
- * us at any time even though we can only execute them
- * serially on the controller/device. This should
- * remove some latency.
- */
- scsi_adjust_queue_depth(dev->scsi_device,
- /*NON-TAGGED*/0,
- /*queue depth*/2);
- break;
+ case AC_BUS_RESET:
+ if (ahd->platform_data->host != NULL) {
+ scsi_report_bus_reset(ahd->platform_data->host,
+ channel - 'A');
}
- }
-}
-
-int
-ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
- int lun, u_int tag, role_t role, uint32_t status)
-{
- return 0;
-}
-
-static void
-ahd_linux_thread_run_complete_queue(struct ahd_softc *ahd)
-{
- u_long flags;
-
- ahd_lock(ahd, &flags);
- del_timer(&ahd->platform_data->completeq_timer);
- ahd->platform_data->flags &= ~AHD_RUN_CMPLT_Q_TIMER;
- ahd_linux_run_complete_queue(ahd);
- ahd_unlock(ahd, &flags);
+ break;
+ default:
+ panic("ahd_send_async: Unexpected async event");
+ }
}
-static void
-ahd_linux_start_dv(struct ahd_softc *ahd)
+/*
+ * Calls the higher level scsi done function and frees the scb.
+ */
+void
+ahd_done(struct ahd_softc *ahd, struct scb *scb)
{
+ struct scsi_cmnd *cmd;
+ struct ahd_linux_device *dev;
- /*
- * Freeze the simq and signal ahd_linux_queue to not let any
- * more commands through
- */
- if ((ahd->platform_data->flags & AHD_DV_ACTIVE) == 0) {
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV)
- printf("%s: Starting DV\n", ahd_name(ahd));
-#endif
-
- ahd->platform_data->flags |= AHD_DV_ACTIVE;
- ahd_freeze_simq(ahd);
-
- /* Wake up the DV kthread */
- up(&ahd->platform_data->dv_sem);
+ if ((scb->flags & SCB_ACTIVE) == 0) {
+ printf("SCB %d done'd twice\n", SCB_GET_TAG(scb));
+ ahd_dump_card_state(ahd);
+ panic("Stopping for safety");
}
-}
-
-static int
-ahd_linux_dv_thread(void *data)
-{
- struct ahd_softc *ahd;
- int target;
- u_long s;
-
- ahd = (struct ahd_softc *)data;
-
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV)
- printf("In DV Thread\n");
-#endif
+ LIST_REMOVE(scb, pending_links);
+ cmd = scb->io_ctx;
+ dev = scb->platform_data->dev;
+ dev->active--;
+ dev->openings++;
+ if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
+ cmd->result &= ~(CAM_DEV_QFRZN << 16);
+ dev->qfrozen--;
+ }
+ ahd_linux_unmap_scb(ahd, scb);
/*
- * Complete thread creation.
+ * Guard against stale sense data.
+ * The Linux mid-layer assumes that sense
+ * was retrieved anytime the first byte of
+ * the sense buffer looks "sane".
*/
- lock_kernel();
-
- daemonize("ahd_dv_%d", ahd->unit);
- current->flags |= PF_FREEZE;
-
- unlock_kernel();
-
- while (1) {
- /*
- * Use down_interruptible() rather than down() to
- * avoid inclusion in the load average.
- */
- down_interruptible(&ahd->platform_data->dv_sem);
-
- /* Check to see if we've been signaled to exit */
- ahd_lock(ahd, &s);
- if ((ahd->platform_data->flags & AHD_DV_SHUTDOWN) != 0) {
- ahd_unlock(ahd, &s);
- break;
- }
- ahd_unlock(ahd, &s);
+ cmd->sense_buffer[0] = 0;
+ if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
+ uint32_t amount_xferred;
+ amount_xferred =
+ ahd_get_transfer_length(scb) - ahd_get_residual(scb);
+ if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV)
- printf("%s: Beginning Domain Validation\n",
- ahd_name(ahd));
+ if ((ahd_debug & AHD_SHOW_MISC) != 0) {
+ ahd_print_path(ahd, scb);
+ printf("Set CAM_UNCOR_PARITY\n");
+ }
#endif
-
+ ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
+#ifdef AHD_REPORT_UNDERFLOWS
/*
- * Wait for any pending commands to drain before proceeding.
+ * This code is disabled by default as some
+ * clients of the SCSI system do not properly
+ * initialize the underflow parameter. This
+ * results in spurious termination of commands
+ * that complete as expected (e.g. underflow is
+ * allowed as command can return variable amounts
+ * of data.
*/
- ahd_lock(ahd, &s);
- while (LIST_FIRST(&ahd->pending_scbs) != NULL) {
- ahd->platform_data->flags |= AHD_DV_WAIT_SIMQ_EMPTY;
- ahd_unlock(ahd, &s);
- down_interruptible(&ahd->platform_data->dv_sem);
- ahd_lock(ahd, &s);
- }
+ } else if (amount_xferred < scb->io_ctx->underflow) {
+ u_int i;
- /*
- * Wait for the SIMQ to be released so that DV is the
- * only reason the queue is frozen.
- */
- while (AHD_DV_SIMQ_FROZEN(ahd) == 0) {
- ahd->platform_data->flags |= AHD_DV_WAIT_SIMQ_RELEASE;
- ahd_unlock(ahd, &s);
- down_interruptible(&ahd->platform_data->dv_sem);
- ahd_lock(ahd, &s);
+ ahd_print_path(ahd, scb);
+ printf("CDB:");
+ for (i = 0; i < scb->io_ctx->cmd_len; i++)
+ printf(" 0x%x", scb->io_ctx->cmnd[i]);
+ printf("\n");
+ ahd_print_path(ahd, scb);
+ printf("Saw underflow (%ld of %ld bytes). "
+ "Treated as error\n",
+ ahd_get_residual(scb),
+ ahd_get_transfer_length(scb));
+ ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
+#endif
+ } else {
+ ahd_set_transaction_status(scb, CAM_REQ_CMP);
}
- ahd_unlock(ahd, &s);
+ } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
+ ahd_linux_handle_scsi_status(ahd, cmd->device, scb);
+ }
- for (target = 0; target < AHD_NUM_TARGETS; target++)
- ahd_linux_dv_target(ahd, target);
+ if (dev->openings == 1
+ && ahd_get_transaction_status(scb) == CAM_REQ_CMP
+ && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
+ dev->tag_success_count++;
+ /*
+ * Some devices deal with temporary internal resource
+ * shortages by returning queue full. When the queue
+ * full occurrs, we throttle back. Slowly try to get
+ * back to our previous queue depth.
+ */
+ if ((dev->openings + dev->active) < dev->maxtags
+ && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
+ dev->tag_success_count = 0;
+ dev->openings++;
+ }
- ahd_lock(ahd, &s);
- ahd->platform_data->flags &= ~AHD_DV_ACTIVE;
- ahd_unlock(ahd, &s);
+ if (dev->active == 0)
+ dev->commands_since_idle_or_otag = 0;
- /*
- * Release the SIMQ so that normal commands are
- * allowed to continue on the bus.
- */
- ahd_release_simq(ahd);
+ if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
+ printf("Recovery SCB completes\n");
+ if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
+ || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
+ ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
+ if ((ahd->platform_data->flags & AHD_SCB_UP_EH_SEM) != 0) {
+ ahd->platform_data->flags &= ~AHD_SCB_UP_EH_SEM;
+ up(&ahd->platform_data->eh_sem);
+ }
}
- up(&ahd->platform_data->eh_sem);
- return (0);
+
+ ahd_free_scb(ahd, scb);
+ ahd_linux_queue_cmd_complete(ahd, cmd);
}
static void
-ahd_linux_kill_dv_thread(struct ahd_softc *ahd)
+ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
+ struct scsi_device *sdev, struct scb *scb)
{
- u_long s;
-
- ahd_lock(ahd, &s);
- if (ahd->platform_data->dv_pid != 0) {
- ahd->platform_data->flags |= AHD_DV_SHUTDOWN;
- ahd_unlock(ahd, &s);
- up(&ahd->platform_data->dv_sem);
+ struct ahd_devinfo devinfo;
+ struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
- /*
- * Use the eh_sem as an indicator that the
- * dv thread is exiting. Note that the dv
- * thread must still return after performing
- * the up on our semaphore before it has
- * completely exited this module. Unfortunately,
- * there seems to be no easy way to wait for the
- * exit of a thread for which you are not the
- * parent (dv threads are parented by init).
- * Cross your fingers...
- */
- down(&ahd->platform_data->eh_sem);
+ ahd_compile_devinfo(&devinfo,
+ ahd->our_id,
+ sdev->sdev_target->id, sdev->lun,
+ sdev->sdev_target->channel == 0 ? 'A' : 'B',
+ ROLE_INITIATOR);
+
+ /*
+ * We don't currently trust the mid-layer to
+ * properly deal with queue full or busy. So,
+ * when one occurs, we tell the mid-layer to
+ * unconditionally requeue the command to us
+ * so that we can retry it ourselves. We also
+ * implement our own throttling mechanism so
+ * we don't clobber the device with too many
+ * commands.
+ */
+ switch (ahd_get_scsi_status(scb)) {
+ default:
+ break;
+ case SCSI_STATUS_CHECK_COND:
+ case SCSI_STATUS_CMD_TERMINATED:
+ {
+ struct scsi_cmnd *cmd;
/*
- * Mark the dv thread as already dead. This
- * avoids attempting to kill it a second time.
- * This is necessary because we must kill the
- * DV thread before calling ahd_free() in the
- * module shutdown case to avoid bogus locking
- * in the SCSI mid-layer, but we ahd_free() is
- * called without killing the DV thread in the
- * instance detach case, so ahd_platform_free()
- * calls us again to verify that the DV thread
- * is dead.
+ * Copy sense information to the OS's cmd
+ * structure if it is available.
*/
- ahd->platform_data->dv_pid = 0;
- } else {
- ahd_unlock(ahd, &s);
- }
-}
-
-#define AHD_LINUX_DV_INQ_SHORT_LEN 36
-#define AHD_LINUX_DV_INQ_LEN 256
-#define AHD_LINUX_DV_TIMEOUT (HZ / 4)
+ cmd = scb->io_ctx;
+ if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
+ struct scsi_status_iu_header *siu;
+ u_int sense_size;
+ u_int sense_offset;
-#define AHD_SET_DV_STATE(ahd, targ, newstate) \
- ahd_set_dv_state(ahd, targ, newstate, __LINE__)
+ if (scb->flags & SCB_SENSE) {
+ sense_size = MIN(sizeof(struct scsi_sense_data)
+ - ahd_get_sense_residual(scb),
+ sizeof(cmd->sense_buffer));
+ sense_offset = 0;
+ } else {
+ /*
+ * Copy only the sense data into the provided
+ * buffer.
+ */
+ siu = (struct scsi_status_iu_header *)
+ scb->sense_data;
+ sense_size = MIN(scsi_4btoul(siu->sense_length),
+ sizeof(cmd->sense_buffer));
+ sense_offset = SIU_SENSE_OFFSET(siu);
+ }
-static __inline void
-ahd_set_dv_state(struct ahd_softc *ahd, struct ahd_linux_target *targ,
- ahd_dv_state newstate, u_int line)
-{
- ahd_dv_state oldstate;
+ memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
+ memcpy(cmd->sense_buffer,
+ ahd_get_sense_buf(ahd, scb)
+ + sense_offset, sense_size);
+ cmd->result |= (DRIVER_SENSE << 24);
- oldstate = targ->dv_state;
#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV)
- printf("%s:%d: Going from state %d to state %d\n",
- ahd_name(ahd), line, oldstate, newstate);
-#endif
-
- if (oldstate == newstate)
- targ->dv_state_retry++;
- else
- targ->dv_state_retry = 0;
- targ->dv_state = newstate;
-}
+ if (ahd_debug & AHD_SHOW_SENSE) {
+ int i;
-static void
-ahd_linux_dv_target(struct ahd_softc *ahd, u_int target_offset)
-{
- struct ahd_devinfo devinfo;
- struct ahd_linux_target *targ;
- struct scsi_cmnd *cmd;
- struct scsi_device *scsi_dev;
- struct scsi_sense_data *sense;
- uint8_t *buffer;
- u_long s;
- u_int timeout;
- int echo_size;
-
- sense = NULL;
- buffer = NULL;
- echo_size = 0;
- ahd_lock(ahd, &s);
- targ = ahd->platform_data->targets[target_offset];
- if (targ == NULL || (targ->flags & AHD_DV_REQUIRED) == 0) {
- ahd_unlock(ahd, &s);
- return;
- }
- ahd_compile_devinfo(&devinfo, ahd->our_id, targ->target, /*lun*/0,
- targ->channel + 'A', ROLE_INITIATOR);
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV) {
- ahd_print_devinfo(ahd, &devinfo);
- printf("Performing DV\n");
- }
-#endif
-
- ahd_unlock(ahd, &s);
-
- cmd = malloc(sizeof(struct scsi_cmnd), M_DEVBUF, M_WAITOK);
- scsi_dev = malloc(sizeof(struct scsi_device), M_DEVBUF, M_WAITOK);
- scsi_dev->host = ahd->platform_data->host;
- scsi_dev->id = devinfo.target;
- scsi_dev->lun = devinfo.lun;
- scsi_dev->channel = devinfo.channel - 'A';
- ahd->platform_data->dv_scsi_dev = scsi_dev;
-
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_INQ_SHORT_ASYNC);
-
- while (targ->dv_state != AHD_DV_STATE_EXIT) {
- timeout = AHD_LINUX_DV_TIMEOUT;
- switch (targ->dv_state) {
- case AHD_DV_STATE_INQ_SHORT_ASYNC:
- case AHD_DV_STATE_INQ_ASYNC:
- case AHD_DV_STATE_INQ_ASYNC_VERIFY:
- /*
- * Set things to async narrow to reduce the
- * chance that the INQ will fail.
- */
- ahd_lock(ahd, &s);
- ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
- AHD_TRANS_GOAL, /*paused*/FALSE);
- ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
- AHD_TRANS_GOAL, /*paused*/FALSE);
- ahd_unlock(ahd, &s);
- timeout = 10 * HZ;
- targ->flags &= ~AHD_INQ_VALID;
- /* FALLTHROUGH */
- case AHD_DV_STATE_INQ_VERIFY:
- {
- u_int inq_len;
-
- if (targ->dv_state == AHD_DV_STATE_INQ_SHORT_ASYNC)
- inq_len = AHD_LINUX_DV_INQ_SHORT_LEN;
- else
- inq_len = targ->inq_data->additional_length + 5;
- ahd_linux_dv_inq(ahd, cmd, &devinfo, targ, inq_len);
- break;
- }
- case AHD_DV_STATE_TUR:
- case AHD_DV_STATE_BUSY:
- timeout = 5 * HZ;
- ahd_linux_dv_tur(ahd, cmd, &devinfo);
- break;
- case AHD_DV_STATE_REBD:
- ahd_linux_dv_rebd(ahd, cmd, &devinfo, targ);
- break;
- case AHD_DV_STATE_WEB:
- ahd_linux_dv_web(ahd, cmd, &devinfo, targ);
- break;
-
- case AHD_DV_STATE_REB:
- ahd_linux_dv_reb(ahd, cmd, &devinfo, targ);
- break;
-
- case AHD_DV_STATE_SU:
- ahd_linux_dv_su(ahd, cmd, &devinfo, targ);
- timeout = 50 * HZ;
- break;
-
- default:
- ahd_print_devinfo(ahd, &devinfo);
- printf("Unknown DV state %d\n", targ->dv_state);
- goto out;
- }
-
- /* Queue the command and wait for it to complete */
- /* Abuse eh_timeout in the scsi_cmnd struct for our purposes */
- init_timer(&cmd->eh_timeout);
-#ifdef AHD_DEBUG
- if ((ahd_debug & AHD_SHOW_MESSAGES) != 0)
- /*
- * All of the printfs during negotiation
- * really slow down the negotiation.
- * Add a bit of time just to be safe.
- */
- timeout += HZ;
-#endif
- scsi_add_timer(cmd, timeout, ahd_linux_dv_timeout);
- /*
- * In 2.5.X, it is assumed that all calls from the
- * "midlayer" (which we are emulating) will have the
- * ahd host lock held. For other kernels, the
- * io_request_lock must be held.
- */
-#if AHD_SCSI_HAS_HOST_LOCK != 0
- ahd_lock(ahd, &s);
-#else
- spin_lock_irqsave(&io_request_lock, s);
-#endif
- ahd_linux_queue(cmd, ahd_linux_dv_complete);
-#if AHD_SCSI_HAS_HOST_LOCK != 0
- ahd_unlock(ahd, &s);
-#else
- spin_unlock_irqrestore(&io_request_lock, s);
-#endif
- down_interruptible(&ahd->platform_data->dv_cmd_sem);
- /*
- * Wait for the SIMQ to be released so that DV is the
- * only reason the queue is frozen.
- */
- ahd_lock(ahd, &s);
- while (AHD_DV_SIMQ_FROZEN(ahd) == 0) {
- ahd->platform_data->flags |= AHD_DV_WAIT_SIMQ_RELEASE;
- ahd_unlock(ahd, &s);
- down_interruptible(&ahd->platform_data->dv_sem);
- ahd_lock(ahd, &s);
- }
- ahd_unlock(ahd, &s);
-
- ahd_linux_dv_transition(ahd, cmd, &devinfo, targ);
- }
-
-out:
- if ((targ->flags & AHD_INQ_VALID) != 0
- && ahd_linux_get_device(ahd, devinfo.channel - 'A',
- devinfo.target, devinfo.lun,
- /*alloc*/FALSE) == NULL) {
- /*
- * The DV state machine failed to configure this device.
- * This is normal if DV is disabled. Since we have inquiry
- * data, filter it and use the "optimistic" negotiation
- * parameters found in the inquiry string.
- */
- ahd_linux_filter_inquiry(ahd, &devinfo);
- if ((targ->flags & (AHD_BASIC_DV|AHD_ENHANCED_DV)) != 0) {
- ahd_print_devinfo(ahd, &devinfo);
- printf("DV failed to configure device. "
- "Please file a bug report against "
- "this driver.\n");
- }
- }
-
- if (cmd != NULL)
- free(cmd, M_DEVBUF);
-
- if (ahd->platform_data->dv_scsi_dev != NULL) {
- free(ahd->platform_data->dv_scsi_dev, M_DEVBUF);
- ahd->platform_data->dv_scsi_dev = NULL;
- }
-
- ahd_lock(ahd, &s);
- if (targ->dv_buffer != NULL) {
- free(targ->dv_buffer, M_DEVBUF);
- targ->dv_buffer = NULL;
- }
- if (targ->dv_buffer1 != NULL) {
- free(targ->dv_buffer1, M_DEVBUF);
- targ->dv_buffer1 = NULL;
- }
- targ->flags &= ~AHD_DV_REQUIRED;
- if (targ->refcount == 0)
- ahd_linux_free_target(ahd, targ);
- ahd_unlock(ahd, &s);
-}
-
-static __inline int
-ahd_linux_dv_fallback(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
-{
- u_long s;
- int retval;
-
- ahd_lock(ahd, &s);
- retval = ahd_linux_fallback(ahd, devinfo);
- ahd_unlock(ahd, &s);
-
- return (retval);
-}
-
-static void
-ahd_linux_dv_transition(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
- struct ahd_devinfo *devinfo,
- struct ahd_linux_target *targ)
-{
- u_int32_t status;
-
- status = aic_error_action(cmd, targ->inq_data,
- ahd_cmd_get_transaction_status(cmd),
- ahd_cmd_get_scsi_status(cmd));
-
-
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV) {
- ahd_print_devinfo(ahd, devinfo);
- printf("Entering ahd_linux_dv_transition, state= %d, "
- "status= 0x%x, cmd->result= 0x%x\n", targ->dv_state,
- status, cmd->result);
- }
-#endif
-
- switch (targ->dv_state) {
- case AHD_DV_STATE_INQ_SHORT_ASYNC:
- case AHD_DV_STATE_INQ_ASYNC:
- switch (status & SS_MASK) {
- case SS_NOP:
- {
- AHD_SET_DV_STATE(ahd, targ, targ->dv_state+1);
- break;
- }
- case SS_INQ_REFRESH:
- AHD_SET_DV_STATE(ahd, targ,
- AHD_DV_STATE_INQ_SHORT_ASYNC);
- break;
- case SS_TUR:
- case SS_RETRY:
- AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
- if (ahd_cmd_get_transaction_status(cmd)
- == CAM_REQUEUE_REQ)
- targ->dv_state_retry--;
- if ((status & SS_ERRMASK) == EBUSY)
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_BUSY);
- if (targ->dv_state_retry < 10)
- break;
- /* FALLTHROUGH */
- default:
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV) {
- ahd_print_devinfo(ahd, devinfo);
- printf("Failed DV inquiry, skipping\n");
- }
-#endif
- break;
- }
- break;
- case AHD_DV_STATE_INQ_ASYNC_VERIFY:
- switch (status & SS_MASK) {
- case SS_NOP:
- {
- u_int xportflags;
- u_int spi3data;
-
- if (memcmp(targ->inq_data, targ->dv_buffer,
- AHD_LINUX_DV_INQ_LEN) != 0) {
- /*
- * Inquiry data must have changed.
- * Try from the top again.
- */
- AHD_SET_DV_STATE(ahd, targ,
- AHD_DV_STATE_INQ_SHORT_ASYNC);
- break;
- }
-
- AHD_SET_DV_STATE(ahd, targ, targ->dv_state+1);
- targ->flags |= AHD_INQ_VALID;
- if (ahd_linux_user_dv_setting(ahd) == 0)
- break;
-
- xportflags = targ->inq_data->flags;
- if ((xportflags & (SID_Sync|SID_WBus16)) == 0)
- break;
-
- spi3data = targ->inq_data->spi3data;
- switch (spi3data & SID_SPI_CLOCK_DT_ST) {
- default:
- case SID_SPI_CLOCK_ST:
- /* Assume only basic DV is supported. */
- targ->flags |= AHD_BASIC_DV;
- break;
- case SID_SPI_CLOCK_DT:
- case SID_SPI_CLOCK_DT_ST:
- targ->flags |= AHD_ENHANCED_DV;
- break;
- }
- break;
- }
- case SS_INQ_REFRESH:
- AHD_SET_DV_STATE(ahd, targ,
- AHD_DV_STATE_INQ_SHORT_ASYNC);
- break;
- case SS_TUR:
- case SS_RETRY:
- AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
- if (ahd_cmd_get_transaction_status(cmd)
- == CAM_REQUEUE_REQ)
- targ->dv_state_retry--;
-
- if ((status & SS_ERRMASK) == EBUSY)
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_BUSY);
- if (targ->dv_state_retry < 10)
- break;
- /* FALLTHROUGH */
- default:
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV) {
- ahd_print_devinfo(ahd, devinfo);
- printf("Failed DV inquiry, skipping\n");
- }
-#endif
- break;
- }
- break;
- case AHD_DV_STATE_INQ_VERIFY:
- switch (status & SS_MASK) {
- case SS_NOP:
- {
-
- if (memcmp(targ->inq_data, targ->dv_buffer,
- AHD_LINUX_DV_INQ_LEN) == 0) {
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
- break;
- }
-
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV) {
- int i;
-
- ahd_print_devinfo(ahd, devinfo);
- printf("Inquiry buffer mismatch:");
- for (i = 0; i < AHD_LINUX_DV_INQ_LEN; i++) {
+ printf("Copied %d bytes of sense data at %d:",
+ sense_size, sense_offset);
+ for (i = 0; i < sense_size; i++) {
if ((i & 0xF) == 0)
- printf("\n ");
- printf("0x%x:0x0%x ",
- ((uint8_t *)targ->inq_data)[i],
- targ->dv_buffer[i]);
+ printf("\n");
+ printf("0x%x ", cmd->sense_buffer[i]);
}
printf("\n");
}
#endif
-
- if (ahd_linux_dv_fallback(ahd, devinfo) != 0) {
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
- break;
- }
- /*
- * Do not count "falling back"
- * against our retries.
- */
- targ->dv_state_retry = 0;
- AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
- break;
- }
- case SS_INQ_REFRESH:
- AHD_SET_DV_STATE(ahd, targ,
- AHD_DV_STATE_INQ_SHORT_ASYNC);
- break;
- case SS_TUR:
- case SS_RETRY:
- AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
- if (ahd_cmd_get_transaction_status(cmd)
- == CAM_REQUEUE_REQ) {
- targ->dv_state_retry--;
- } else if ((status & SSQ_FALLBACK) != 0) {
- if (ahd_linux_dv_fallback(ahd, devinfo) != 0) {
- AHD_SET_DV_STATE(ahd, targ,
- AHD_DV_STATE_EXIT);
- break;
- }
- /*
- * Do not count "falling back"
- * against our retries.
- */
- targ->dv_state_retry = 0;
- } else if ((status & SS_ERRMASK) == EBUSY)
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_BUSY);
- if (targ->dv_state_retry < 10)
- break;
- /* FALLTHROUGH */
- default:
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV) {
- ahd_print_devinfo(ahd, devinfo);
- printf("Failed DV inquiry, skipping\n");
- }
-#endif
- break;
- }
- break;
-
- case AHD_DV_STATE_TUR:
- switch (status & SS_MASK) {
- case SS_NOP:
- if ((targ->flags & AHD_BASIC_DV) != 0) {
- ahd_linux_filter_inquiry(ahd, devinfo);
- AHD_SET_DV_STATE(ahd, targ,
- AHD_DV_STATE_INQ_VERIFY);
- } else if ((targ->flags & AHD_ENHANCED_DV) != 0) {
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_REBD);
- } else {
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
- }
- break;
- case SS_RETRY:
- case SS_TUR:
- if ((status & SS_ERRMASK) == EBUSY) {
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_BUSY);
- break;
- }
- AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
- if (ahd_cmd_get_transaction_status(cmd)
- == CAM_REQUEUE_REQ) {
- targ->dv_state_retry--;
- } else if ((status & SSQ_FALLBACK) != 0) {
- if (ahd_linux_dv_fallback(ahd, devinfo) != 0) {
- AHD_SET_DV_STATE(ahd, targ,
- AHD_DV_STATE_EXIT);
- break;
- }
- /*
- * Do not count "falling back"
- * against our retries.
- */
- targ->dv_state_retry = 0;
- }
- if (targ->dv_state_retry >= 10) {
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV) {
- ahd_print_devinfo(ahd, devinfo);
- printf("DV TUR reties exhausted\n");
- }
-#endif
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
- break;
- }
- if (status & SSQ_DELAY)
- ssleep(1);
-
- break;
- case SS_START:
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_SU);
- break;
- case SS_INQ_REFRESH:
- AHD_SET_DV_STATE(ahd, targ,
- AHD_DV_STATE_INQ_SHORT_ASYNC);
- break;
- default:
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
- break;
}
break;
-
- case AHD_DV_STATE_REBD:
- switch (status & SS_MASK) {
- case SS_NOP:
- {
- uint32_t echo_size;
-
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_WEB);
- echo_size = scsi_3btoul(&targ->dv_buffer[1]);
- echo_size &= 0x1FFF;
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV) {
- ahd_print_devinfo(ahd, devinfo);
- printf("Echo buffer size= %d\n", echo_size);
- }
-#endif
- if (echo_size == 0) {
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
- break;
- }
-
- /* Generate the buffer pattern */
- targ->dv_echo_size = echo_size;
- ahd_linux_generate_dv_pattern(targ);
+ }
+ case SCSI_STATUS_QUEUE_FULL:
+ /*
+ * By the time the core driver has returned this
+ * command, all other commands that were queued
+ * to us but not the device have been returned.
+ * This ensures that dev->active is equal to
+ * the number of commands actually queued to
+ * the device.
+ */
+ dev->tag_success_count = 0;
+ if (dev->active != 0) {
/*
- * Setup initial negotiation values.
+ * Drop our opening count to the number
+ * of commands currently outstanding.
*/
- ahd_linux_filter_inquiry(ahd, devinfo);
- break;
- }
- case SS_INQ_REFRESH:
- AHD_SET_DV_STATE(ahd, targ,
- AHD_DV_STATE_INQ_SHORT_ASYNC);
- break;
- case SS_RETRY:
- AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
- if (ahd_cmd_get_transaction_status(cmd)
- == CAM_REQUEUE_REQ)
- targ->dv_state_retry--;
- if (targ->dv_state_retry <= 10)
- break;
+ dev->openings = 0;
#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV) {
- ahd_print_devinfo(ahd, devinfo);
- printf("DV REBD reties exhausted\n");
+ if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
+ ahd_print_path(ahd, scb);
+ printf("Dropping tag count to %d\n",
+ dev->active);
}
#endif
- /* FALLTHROUGH */
- case SS_FATAL:
- default:
- /*
- * Setup initial negotiation values
- * and try level 1 DV.
- */
- ahd_linux_filter_inquiry(ahd, devinfo);
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_INQ_VERIFY);
- targ->dv_echo_size = 0;
- break;
- }
- break;
+ if (dev->active == dev->tags_on_last_queuefull) {
- case AHD_DV_STATE_WEB:
- switch (status & SS_MASK) {
- case SS_NOP:
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_REB);
- break;
- case SS_INQ_REFRESH:
- AHD_SET_DV_STATE(ahd, targ,
- AHD_DV_STATE_INQ_SHORT_ASYNC);
- break;
- case SS_RETRY:
- AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
- if (ahd_cmd_get_transaction_status(cmd)
- == CAM_REQUEUE_REQ) {
- targ->dv_state_retry--;
- } else if ((status & SSQ_FALLBACK) != 0) {
- if (ahd_linux_dv_fallback(ahd, devinfo) != 0) {
- AHD_SET_DV_STATE(ahd, targ,
- AHD_DV_STATE_EXIT);
- break;
- }
+ dev->last_queuefull_same_count++;
/*
- * Do not count "falling back"
- * against our retries.
+ * If we repeatedly see a queue full
+ * at the same queue depth, this
+ * device has a fixed number of tag
+ * slots. Lock in this tag depth
+ * so we stop seeing queue fulls from
+ * this device.
*/
- targ->dv_state_retry = 0;
- }
- if (targ->dv_state_retry <= 10)
- break;
- /* FALLTHROUGH */
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV) {
- ahd_print_devinfo(ahd, devinfo);
- printf("DV WEB reties exhausted\n");
- }
-#endif
- default:
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
- break;
- }
- break;
-
- case AHD_DV_STATE_REB:
- switch (status & SS_MASK) {
- case SS_NOP:
- if (memcmp(targ->dv_buffer, targ->dv_buffer1,
- targ->dv_echo_size) != 0) {
- if (ahd_linux_dv_fallback(ahd, devinfo) != 0)
- AHD_SET_DV_STATE(ahd, targ,
- AHD_DV_STATE_EXIT);
- else
- AHD_SET_DV_STATE(ahd, targ,
- AHD_DV_STATE_WEB);
- break;
- }
-
- if (targ->dv_buffer != NULL) {
- free(targ->dv_buffer, M_DEVBUF);
- targ->dv_buffer = NULL;
- }
- if (targ->dv_buffer1 != NULL) {
- free(targ->dv_buffer1, M_DEVBUF);
- targ->dv_buffer1 = NULL;
- }
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
- break;
- case SS_INQ_REFRESH:
- AHD_SET_DV_STATE(ahd, targ,
- AHD_DV_STATE_INQ_SHORT_ASYNC);
- break;
- case SS_RETRY:
- AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
- if (ahd_cmd_get_transaction_status(cmd)
- == CAM_REQUEUE_REQ) {
- targ->dv_state_retry--;
- } else if ((status & SSQ_FALLBACK) != 0) {
- if (ahd_linux_dv_fallback(ahd, devinfo) != 0) {
- AHD_SET_DV_STATE(ahd, targ,
- AHD_DV_STATE_EXIT);
- break;
+ if (dev->last_queuefull_same_count
+ == AHD_LOCK_TAGS_COUNT) {
+ dev->maxtags = dev->active;
+ ahd_print_path(ahd, scb);
+ printf("Locking max tag count at %d\n",
+ dev->active);
}
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_WEB);
- }
- if (targ->dv_state_retry <= 10) {
- if ((status & (SSQ_DELAY_RANDOM|SSQ_DELAY))!= 0)
- msleep(ahd->our_id*1000/10);
- break;
- }
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV) {
- ahd_print_devinfo(ahd, devinfo);
- printf("DV REB reties exhausted\n");
+ } else {
+ dev->tags_on_last_queuefull = dev->active;
+ dev->last_queuefull_same_count = 0;
}
-#endif
- /* FALLTHROUGH */
- default:
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
- break;
- }
- break;
-
- case AHD_DV_STATE_SU:
- switch (status & SS_MASK) {
- case SS_NOP:
- case SS_INQ_REFRESH:
- AHD_SET_DV_STATE(ahd, targ,
- AHD_DV_STATE_INQ_SHORT_ASYNC);
- break;
- default:
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
+ ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
+ ahd_set_scsi_status(scb, SCSI_STATUS_OK);
+ ahd_platform_set_tags(ahd, &devinfo,
+ (dev->flags & AHD_DEV_Q_BASIC)
+ ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
break;
}
- break;
-
- case AHD_DV_STATE_BUSY:
- switch (status & SS_MASK) {
- case SS_NOP:
- case SS_INQ_REFRESH:
- AHD_SET_DV_STATE(ahd, targ,
- AHD_DV_STATE_INQ_SHORT_ASYNC);
- break;
- case SS_TUR:
- case SS_RETRY:
- AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
- if (ahd_cmd_get_transaction_status(cmd)
- == CAM_REQUEUE_REQ) {
- targ->dv_state_retry--;
- } else if (targ->dv_state_retry < 60) {
- if ((status & SSQ_DELAY) != 0)
- ssleep(1);
- } else {
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV) {
- ahd_print_devinfo(ahd, devinfo);
- printf("DV BUSY reties exhausted\n");
- }
-#endif
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
- }
- break;
- default:
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
- break;
- }
- break;
-
- default:
- printf("%s: Invalid DV completion state %d\n", ahd_name(ahd),
- targ->dv_state);
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
- break;
- }
-}
-
-static void
-ahd_linux_dv_fill_cmd(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
- struct ahd_devinfo *devinfo)
-{
- memset(cmd, 0, sizeof(struct scsi_cmnd));
- cmd->device = ahd->platform_data->dv_scsi_dev;
- cmd->scsi_done = ahd_linux_dv_complete;
-}
-
-/*
- * Synthesize an inquiry command. On the return trip, it'll be
- * sniffed and the device transfer settings set for us.
- */
-static void
-ahd_linux_dv_inq(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
- struct ahd_devinfo *devinfo, struct ahd_linux_target *targ,
- u_int request_length)
-{
-
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV) {
- ahd_print_devinfo(ahd, devinfo);
- printf("Sending INQ\n");
- }
-#endif
- if (targ->inq_data == NULL)
- targ->inq_data = malloc(AHD_LINUX_DV_INQ_LEN,
- M_DEVBUF, M_WAITOK);
- if (targ->dv_state > AHD_DV_STATE_INQ_ASYNC) {
- if (targ->dv_buffer != NULL)
- free(targ->dv_buffer, M_DEVBUF);
- targ->dv_buffer = malloc(AHD_LINUX_DV_INQ_LEN,
- M_DEVBUF, M_WAITOK);
- }
-
- ahd_linux_dv_fill_cmd(ahd, cmd, devinfo);
- cmd->sc_data_direction = DMA_FROM_DEVICE;
- cmd->cmd_len = 6;
- cmd->cmnd[0] = INQUIRY;
- cmd->cmnd[4] = request_length;
- cmd->request_bufflen = request_length;
- if (targ->dv_state > AHD_DV_STATE_INQ_ASYNC)
- cmd->request_buffer = targ->dv_buffer;
- else
- cmd->request_buffer = targ->inq_data;
- memset(cmd->request_buffer, 0, AHD_LINUX_DV_INQ_LEN);
-}
-
-static void
-ahd_linux_dv_tur(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
- struct ahd_devinfo *devinfo)
-{
-
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV) {
- ahd_print_devinfo(ahd, devinfo);
- printf("Sending TUR\n");
- }
-#endif
- /* Do a TUR to clear out any non-fatal transitional state */
- ahd_linux_dv_fill_cmd(ahd, cmd, devinfo);
- cmd->sc_data_direction = DMA_NONE;
- cmd->cmd_len = 6;
- cmd->cmnd[0] = TEST_UNIT_READY;
-}
-
-#define AHD_REBD_LEN 4
-
-static void
-ahd_linux_dv_rebd(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
- struct ahd_devinfo *devinfo, struct ahd_linux_target *targ)
-{
-
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV) {
- ahd_print_devinfo(ahd, devinfo);
- printf("Sending REBD\n");
- }
-#endif
- if (targ->dv_buffer != NULL)
- free(targ->dv_buffer, M_DEVBUF);
- targ->dv_buffer = malloc(AHD_REBD_LEN, M_DEVBUF, M_WAITOK);
- ahd_linux_dv_fill_cmd(ahd, cmd, devinfo);
- cmd->sc_data_direction = DMA_FROM_DEVICE;
- cmd->cmd_len = 10;
- cmd->cmnd[0] = READ_BUFFER;
- cmd->cmnd[1] = 0x0b;
- scsi_ulto3b(AHD_REBD_LEN, &cmd->cmnd[6]);
- cmd->request_bufflen = AHD_REBD_LEN;
- cmd->underflow = cmd->request_bufflen;
- cmd->request_buffer = targ->dv_buffer;
-}
-
-static void
-ahd_linux_dv_web(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
- struct ahd_devinfo *devinfo, struct ahd_linux_target *targ)
-{
-
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV) {
- ahd_print_devinfo(ahd, devinfo);
- printf("Sending WEB\n");
- }
-#endif
- ahd_linux_dv_fill_cmd(ahd, cmd, devinfo);
- cmd->sc_data_direction = DMA_TO_DEVICE;
- cmd->cmd_len = 10;
- cmd->cmnd[0] = WRITE_BUFFER;
- cmd->cmnd[1] = 0x0a;
- scsi_ulto3b(targ->dv_echo_size, &cmd->cmnd[6]);
- cmd->request_bufflen = targ->dv_echo_size;
- cmd->underflow = cmd->request_bufflen;
- cmd->request_buffer = targ->dv_buffer;
-}
-
-static void
-ahd_linux_dv_reb(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
- struct ahd_devinfo *devinfo, struct ahd_linux_target *targ)
-{
-
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV) {
- ahd_print_devinfo(ahd, devinfo);
- printf("Sending REB\n");
- }
-#endif
- ahd_linux_dv_fill_cmd(ahd, cmd, devinfo);
- cmd->sc_data_direction = DMA_FROM_DEVICE;
- cmd->cmd_len = 10;
- cmd->cmnd[0] = READ_BUFFER;
- cmd->cmnd[1] = 0x0a;
- scsi_ulto3b(targ->dv_echo_size, &cmd->cmnd[6]);
- cmd->request_bufflen = targ->dv_echo_size;
- cmd->underflow = cmd->request_bufflen;
- cmd->request_buffer = targ->dv_buffer1;
-}
-
-static void
-ahd_linux_dv_su(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
- struct ahd_devinfo *devinfo,
- struct ahd_linux_target *targ)
-{
- u_int le;
-
- le = SID_IS_REMOVABLE(targ->inq_data) ? SSS_LOEJ : 0;
-
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV) {
- ahd_print_devinfo(ahd, devinfo);
- printf("Sending SU\n");
- }
-#endif
- ahd_linux_dv_fill_cmd(ahd, cmd, devinfo);
- cmd->sc_data_direction = DMA_NONE;
- cmd->cmd_len = 6;
- cmd->cmnd[0] = START_STOP_UNIT;
- cmd->cmnd[4] = le | SSS_START;
-}
-
-static int
-ahd_linux_fallback(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
-{
- struct ahd_linux_target *targ;
- struct ahd_initiator_tinfo *tinfo;
- struct ahd_transinfo *goal;
- struct ahd_tmode_tstate *tstate;
- u_int width;
- u_int period;
- u_int offset;
- u_int ppr_options;
- u_int cur_speed;
- u_int wide_speed;
- u_int narrow_speed;
- u_int fallback_speed;
-
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV) {
- ahd_print_devinfo(ahd, devinfo);
- printf("Trying to fallback\n");
- }
-#endif
- targ = ahd->platform_data->targets[devinfo->target_offset];
- tinfo = ahd_fetch_transinfo(ahd, devinfo->channel,
- devinfo->our_scsiid,
- devinfo->target, &tstate);
- goal = &tinfo->goal;
- width = goal->width;
- period = goal->period;
- offset = goal->offset;
- ppr_options = goal->ppr_options;
- if (offset == 0)
- period = AHD_ASYNC_XFER_PERIOD;
- if (targ->dv_next_narrow_period == 0)
- targ->dv_next_narrow_period = MAX(period, AHD_SYNCRATE_ULTRA2);
- if (targ->dv_next_wide_period == 0)
- targ->dv_next_wide_period = period;
- if (targ->dv_max_width == 0)
- targ->dv_max_width = width;
- if (targ->dv_max_ppr_options == 0)
- targ->dv_max_ppr_options = ppr_options;
- if (targ->dv_last_ppr_options == 0)
- targ->dv_last_ppr_options = ppr_options;
-
- cur_speed = aic_calc_speed(width, period, offset, AHD_SYNCRATE_MIN);
- wide_speed = aic_calc_speed(MSG_EXT_WDTR_BUS_16_BIT,
- targ->dv_next_wide_period,
- MAX_OFFSET, AHD_SYNCRATE_MIN);
- narrow_speed = aic_calc_speed(MSG_EXT_WDTR_BUS_8_BIT,
- targ->dv_next_narrow_period,
- MAX_OFFSET, AHD_SYNCRATE_MIN);
- fallback_speed = aic_calc_speed(width, period+1, offset,
- AHD_SYNCRATE_MIN);
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV) {
- printf("cur_speed= %d, wide_speed= %d, narrow_speed= %d, "
- "fallback_speed= %d\n", cur_speed, wide_speed,
- narrow_speed, fallback_speed);
- }
-#endif
-
- if (cur_speed > 160000) {
- /*
- * Paced/DT/IU_REQ only transfer speeds. All we
- * can do is fallback in terms of syncrate.
- */
- period++;
- } else if (cur_speed > 80000) {
- if ((ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
- /*
- * Try without IU_REQ as it may be confusing
- * an expander.
- */
- ppr_options &= ~MSG_EXT_PPR_IU_REQ;
- } else {
- /*
- * Paced/DT only transfer speeds. All we
- * can do is fallback in terms of syncrate.
- */
- period++;
- ppr_options = targ->dv_max_ppr_options;
- }
- } else if (cur_speed > 3300) {
-
- /*
- * In this range we the following
- * options ordered from highest to
- * lowest desireability:
- *
- * o Wide/DT
- * o Wide/non-DT
- * o Narrow at a potentally higher sync rate.
- *
- * All modes are tested with and without IU_REQ
- * set since using IUs may confuse an expander.
- */
- if ((ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
-
- ppr_options &= ~MSG_EXT_PPR_IU_REQ;
- } else if ((ppr_options & MSG_EXT_PPR_DT_REQ) != 0) {
- /*
- * Try going non-DT.
- */
- ppr_options = targ->dv_max_ppr_options;
- ppr_options &= ~MSG_EXT_PPR_DT_REQ;
- } else if (targ->dv_last_ppr_options != 0) {
- /*
- * Try without QAS or any other PPR options.
- * We may need a non-PPR message to work with
- * an expander. We look at the "last PPR options"
- * so we will perform this fallback even if the
- * target responded to our PPR negotiation with
- * no option bits set.
- */
- ppr_options = 0;
- } else if (width == MSG_EXT_WDTR_BUS_16_BIT) {
- /*
- * If the next narrow speed is greater than
- * the next wide speed, fallback to narrow.
- * Otherwise fallback to the next DT/Wide setting.
- * The narrow async speed will always be smaller
- * than the wide async speed, so handle this case
- * specifically.
- */
- ppr_options = targ->dv_max_ppr_options;
- if (narrow_speed > fallback_speed
- || period >= AHD_ASYNC_XFER_PERIOD) {
- targ->dv_next_wide_period = period+1;
- width = MSG_EXT_WDTR_BUS_8_BIT;
- period = targ->dv_next_narrow_period;
- } else {
- period++;
- }
- } else if ((ahd->features & AHD_WIDE) != 0
- && targ->dv_max_width != 0
- && wide_speed >= fallback_speed
- && (targ->dv_next_wide_period <= AHD_ASYNC_XFER_PERIOD
- || period >= AHD_ASYNC_XFER_PERIOD)) {
-
- /*
- * We are narrow. Try falling back
- * to the next wide speed with
- * all supported ppr options set.
- */
- targ->dv_next_narrow_period = period+1;
- width = MSG_EXT_WDTR_BUS_16_BIT;
- period = targ->dv_next_wide_period;
- ppr_options = targ->dv_max_ppr_options;
- } else {
- /* Only narrow fallback is allowed. */
- period++;
- ppr_options = targ->dv_max_ppr_options;
- }
- } else {
- return (-1);
- }
- offset = MAX_OFFSET;
- ahd_find_syncrate(ahd, &period, &ppr_options, AHD_SYNCRATE_PACED);
- ahd_set_width(ahd, devinfo, width, AHD_TRANS_GOAL, FALSE);
- if (period == 0) {
- period = 0;
- offset = 0;
- ppr_options = 0;
- if (width == MSG_EXT_WDTR_BUS_8_BIT)
- targ->dv_next_narrow_period = AHD_ASYNC_XFER_PERIOD;
- else
- targ->dv_next_wide_period = AHD_ASYNC_XFER_PERIOD;
- }
- ahd_set_syncrate(ahd, devinfo, period, offset,
- ppr_options, AHD_TRANS_GOAL, FALSE);
- targ->dv_last_ppr_options = ppr_options;
- return (0);
-}
-
-static void
-ahd_linux_dv_timeout(struct scsi_cmnd *cmd)
-{
- struct ahd_softc *ahd;
- struct scb *scb;
- u_long flags;
-
- ahd = *((struct ahd_softc **)cmd->device->host->hostdata);
- ahd_lock(ahd, &flags);
-
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV) {
- printf("%s: Timeout while doing DV command %x.\n",
- ahd_name(ahd), cmd->cmnd[0]);
- ahd_dump_card_state(ahd);
- }
-#endif
-
- /*
- * Guard against "done race". No action is
- * required if we just completed.
- */
- if ((scb = (struct scb *)cmd->host_scribble) == NULL) {
- ahd_unlock(ahd, &flags);
- return;
- }
-
- /*
- * Command has not completed. Mark this
- * SCB as having failing status prior to
- * resetting the bus, so we get the correct
- * error code.
- */
- if ((scb->flags & SCB_SENSE) != 0)
- ahd_set_transaction_status(scb, CAM_AUTOSENSE_FAIL);
- else
- ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
- ahd_reset_channel(ahd, cmd->device->channel + 'A', /*initiate*/TRUE);
-
- /*
- * Add a minimal bus settle delay for devices that are slow to
- * respond after bus resets.
- */
- ahd_freeze_simq(ahd);
- init_timer(&ahd->platform_data->reset_timer);
- ahd->platform_data->reset_timer.data = (u_long)ahd;
- ahd->platform_data->reset_timer.expires = jiffies + HZ / 2;
- ahd->platform_data->reset_timer.function =
- (ahd_linux_callback_t *)ahd_release_simq;
- add_timer(&ahd->platform_data->reset_timer);
- ahd_linux_run_complete_queue(ahd);
- ahd_unlock(ahd, &flags);
-}
-
-static void
-ahd_linux_dv_complete(struct scsi_cmnd *cmd)
-{
- struct ahd_softc *ahd;
-
- ahd = *((struct ahd_softc **)cmd->device->host->hostdata);
-
- /* Delete the DV timer before it goes off! */
- scsi_delete_timer(cmd);
-
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV)
- printf("%s:%c:%d: Command completed, status= 0x%x\n",
- ahd_name(ahd), cmd->device->channel, cmd->device->id,
- cmd->result);
-#endif
-
- /* Wake up the state machine */
- up(&ahd->platform_data->dv_cmd_sem);
-}
-
-static void
-ahd_linux_generate_dv_pattern(struct ahd_linux_target *targ)
-{
- uint16_t b;
- u_int i;
- u_int j;
-
- if (targ->dv_buffer != NULL)
- free(targ->dv_buffer, M_DEVBUF);
- targ->dv_buffer = malloc(targ->dv_echo_size, M_DEVBUF, M_WAITOK);
- if (targ->dv_buffer1 != NULL)
- free(targ->dv_buffer1, M_DEVBUF);
- targ->dv_buffer1 = malloc(targ->dv_echo_size, M_DEVBUF, M_WAITOK);
-
- i = 0;
-
- b = 0x0001;
- for (j = 0 ; i < targ->dv_echo_size; j++) {
- if (j < 32) {
- /*
- * 32bytes of sequential numbers.
- */
- targ->dv_buffer[i++] = j & 0xff;
- } else if (j < 48) {
- /*
- * 32bytes of repeating 0x0000, 0xffff.
- */
- targ->dv_buffer[i++] = (j & 0x02) ? 0xff : 0x00;
- } else if (j < 64) {
- /*
- * 32bytes of repeating 0x5555, 0xaaaa.
- */
- targ->dv_buffer[i++] = (j & 0x02) ? 0xaa : 0x55;
- } else {
- /*
- * Remaining buffer is filled with a repeating
- * patter of:
- *
- * 0xffff
- * ~0x0001 << shifted once in each loop.
- */
- if (j & 0x02) {
- if (j & 0x01) {
- targ->dv_buffer[i++] = ~(b >> 8) & 0xff;
- b <<= 1;
- if (b == 0x0000)
- b = 0x0001;
- } else {
- targ->dv_buffer[i++] = (~b & 0xff);
- }
- } else {
- targ->dv_buffer[i++] = 0xff;
- }
- }
- }
-}
-
-static u_int
-ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
-{
- static int warned_user;
- u_int tags;
-
- tags = 0;
- if ((ahd->user_discenable & devinfo->target_mask) != 0) {
- if (ahd->unit >= NUM_ELEMENTS(aic79xx_tag_info)) {
-
- if (warned_user == 0) {
- printf(KERN_WARNING
-"aic79xx: WARNING: Insufficient tag_info instances\n"
-"aic79xx: for installed controllers. Using defaults\n"
-"aic79xx: Please update the aic79xx_tag_info array in\n"
-"aic79xx: the aic79xx_osm.c source file.\n");
- warned_user++;
- }
- tags = AHD_MAX_QUEUE;
- } else {
- adapter_tag_info_t *tag_info;
-
- tag_info = &aic79xx_tag_info[ahd->unit];
- tags = tag_info->tag_commands[devinfo->target_offset];
- if (tags > AHD_MAX_QUEUE)
- tags = AHD_MAX_QUEUE;
- }
- }
- return (tags);
-}
-
-static u_int
-ahd_linux_user_dv_setting(struct ahd_softc *ahd)
-{
- static int warned_user;
- int dv;
-
- if (ahd->unit >= NUM_ELEMENTS(aic79xx_dv_settings)) {
-
- if (warned_user == 0) {
- printf(KERN_WARNING
-"aic79xx: WARNING: Insufficient dv settings instances\n"
-"aic79xx: for installed controllers. Using defaults\n"
-"aic79xx: Please update the aic79xx_dv_settings array in"
-"aic79xx: the aic79xx_osm.c source file.\n");
- warned_user++;
- }
- dv = -1;
- } else {
-
- dv = aic79xx_dv_settings[ahd->unit];
- }
-
- if (dv < 0) {
/*
- * Apply the default.
+ * Drop down to a single opening, and treat this
+ * as if the target returned BUSY SCSI status.
*/
- dv = 1;
- if (ahd->seep_config != 0)
- dv = (ahd->seep_config->bios_control & CFENABLEDV);
- }
- return (dv);
-}
-
-static void
-ahd_linux_setup_user_rd_strm_settings(struct ahd_softc *ahd)
-{
- static int warned_user;
- u_int rd_strm_mask;
- u_int target_id;
-
- /*
- * If we have specific read streaming info for this controller,
- * apply it. Otherwise use the defaults.
- */
- if (ahd->unit >= NUM_ELEMENTS(aic79xx_rd_strm_info)) {
-
- if (warned_user == 0) {
-
- printf(KERN_WARNING
-"aic79xx: WARNING: Insufficient rd_strm instances\n"
-"aic79xx: for installed controllers. Using defaults\n"
-"aic79xx: Please update the aic79xx_rd_strm_info array\n"
-"aic79xx: in the aic79xx_osm.c source file.\n");
- warned_user++;
- }
- rd_strm_mask = AIC79XX_CONFIGED_RD_STRM;
- } else {
-
- rd_strm_mask = aic79xx_rd_strm_info[ahd->unit];
- }
- for (target_id = 0; target_id < 16; target_id++) {
- struct ahd_devinfo devinfo;
- struct ahd_initiator_tinfo *tinfo;
- struct ahd_tmode_tstate *tstate;
-
- tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
- target_id, &tstate);
- ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
- CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
- tinfo->user.ppr_options &= ~MSG_EXT_PPR_RD_STRM;
- if ((rd_strm_mask & devinfo.target_mask) != 0)
- tinfo->user.ppr_options |= MSG_EXT_PPR_RD_STRM;
- }
-}
-
-/*
- * Determines the queue depth for a given device.
- */
-static void
-ahd_linux_device_queue_depth(struct ahd_softc *ahd,
- struct ahd_linux_device *dev)
-{
- struct ahd_devinfo devinfo;
- u_int tags;
-
- ahd_compile_devinfo(&devinfo,
- ahd->our_id,
- dev->target->target, dev->lun,
- dev->target->channel == 0 ? 'A' : 'B',
- ROLE_INITIATOR);
- tags = ahd_linux_user_tagdepth(ahd, &devinfo);
- if (tags != 0
- && dev->scsi_device != NULL
- && dev->scsi_device->tagged_supported != 0) {
-
- ahd_set_tags(ahd, &devinfo, AHD_QUEUE_TAGGED);
- ahd_print_devinfo(ahd, &devinfo);
- printf("Tagged Queuing enabled. Depth %d\n", tags);
- } else {
- ahd_set_tags(ahd, &devinfo, AHD_QUEUE_NONE);
- }
-}
-
-static int
-ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
- struct scsi_cmnd *cmd)
-{
- struct scb *scb;
- struct hardware_scb *hscb;
- struct ahd_initiator_tinfo *tinfo;
- struct ahd_tmode_tstate *tstate;
- u_int col_idx;
- uint16_t mask;
-
- /*
- * Get an scb to use.
- */
- tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
- cmd->device->id, &tstate);
- if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
- || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
- col_idx = AHD_NEVER_COL_IDX;
- } else {
- col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
- cmd->device->lun);
- }
- if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
- ahd->flags |= AHD_RESOURCE_SHORTAGE;
- return SCSI_MLQUEUE_HOST_BUSY;
- }
-
- scb->io_ctx = cmd;
- scb->platform_data->dev = dev;
- hscb = scb->hscb;
- cmd->host_scribble = (char *)scb;
-
- /*
- * Fill out basics of the HSCB.
- */
- hscb->control = 0;
- hscb->scsiid = BUILD_SCSIID(ahd, cmd);
- hscb->lun = cmd->device->lun;
- scb->hscb->task_management = 0;
- mask = SCB_GET_TARGET_MASK(ahd, scb);
-
- if ((ahd->user_discenable & mask) != 0)
- hscb->control |= DISCENB;
-
- if (AHD_DV_CMD(cmd) != 0)
- scb->flags |= SCB_SILENT;
-
- if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
- scb->flags |= SCB_PACKETIZED;
-
- if ((tstate->auto_negotiate & mask) != 0) {
- scb->flags |= SCB_AUTO_NEGOTIATE;
- scb->hscb->control |= MK_MESSAGE;
- }
-
- if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
- int msg_bytes;
- uint8_t tag_msgs[2];
-
- msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
- if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
- hscb->control |= tag_msgs[0];
- if (tag_msgs[0] == MSG_ORDERED_TASK)
- dev->commands_since_idle_or_otag = 0;
- } else
- if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
- && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
- hscb->control |= MSG_ORDERED_TASK;
- dev->commands_since_idle_or_otag = 0;
- } else {
- hscb->control |= MSG_SIMPLE_TASK;
- }
- }
-
- hscb->cdb_len = cmd->cmd_len;
- memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
-
- scb->sg_count = 0;
- ahd_set_residual(scb, 0);
- ahd_set_sense_residual(scb, 0);
- if (cmd->use_sg != 0) {
- void *sg;
- struct scatterlist *cur_seg;
- u_int nseg;
- int dir;
-
- cur_seg = (struct scatterlist *)cmd->request_buffer;
- dir = cmd->sc_data_direction;
- nseg = pci_map_sg(ahd->dev_softc, cur_seg,
- cmd->use_sg, dir);
- scb->platform_data->xfer_len = 0;
- for (sg = scb->sg_list; nseg > 0; nseg--, cur_seg++) {
- dma_addr_t addr;
- bus_size_t len;
-
- addr = sg_dma_address(cur_seg);
- len = sg_dma_len(cur_seg);
- scb->platform_data->xfer_len += len;
- sg = ahd_sg_setup(ahd, scb, sg, addr, len,
- /*last*/nseg == 1);
- }
- } else if (cmd->request_bufflen != 0) {
- void *sg;
- dma_addr_t addr;
- int dir;
-
- sg = scb->sg_list;
- dir = cmd->sc_data_direction;
- addr = pci_map_single(ahd->dev_softc,
- cmd->request_buffer,
- cmd->request_bufflen, dir);
- scb->platform_data->xfer_len = cmd->request_bufflen;
- scb->platform_data->buf_busaddr = addr;
- sg = ahd_sg_setup(ahd, scb, sg, addr,
- cmd->request_bufflen, /*last*/TRUE);
- }
-
- LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
- dev->openings--;
- dev->active++;
- dev->commands_issued++;
-
- /* Update the error counting bucket and dump if needed */
- if (dev->target->cmds_since_error) {
- dev->target->cmds_since_error++;
- if (dev->target->cmds_since_error >
- AHD_LINUX_ERR_THRESH)
- dev->target->cmds_since_error = 0;
- }
-
- if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
- dev->commands_since_idle_or_otag++;
- scb->flags |= SCB_ACTIVE;
- ahd_queue_scb(ahd, scb);
-
- return 0;
-}
-
-/*
- * SCSI controller interrupt handler.
- */
-irqreturn_t
-ahd_linux_isr(int irq, void *dev_id, struct pt_regs * regs)
-{
- struct ahd_softc *ahd;
- u_long flags;
- int ours;
-
- ahd = (struct ahd_softc *) dev_id;
- ahd_lock(ahd, &flags);
- ours = ahd_intr(ahd);
- ahd_linux_run_complete_queue(ahd);
- ahd_unlock(ahd, &flags);
- return IRQ_RETVAL(ours);
-}
-
-void
-ahd_platform_flushwork(struct ahd_softc *ahd)
-{
-
- while (ahd_linux_run_complete_queue(ahd) != NULL)
- ;
-}
-
-static struct ahd_linux_target*
-ahd_linux_alloc_target(struct ahd_softc *ahd, u_int channel, u_int target)
-{
- struct ahd_linux_target *targ;
-
- targ = malloc(sizeof(*targ), M_DEVBUF, M_NOWAIT);
- if (targ == NULL)
- return (NULL);
- memset(targ, 0, sizeof(*targ));
- targ->channel = channel;
- targ->target = target;
- targ->ahd = ahd;
- targ->flags = AHD_DV_REQUIRED;
- ahd->platform_data->targets[target] = targ;
- return (targ);
-}
-
-static void
-ahd_linux_free_target(struct ahd_softc *ahd, struct ahd_linux_target *targ)
-{
- struct ahd_devinfo devinfo;
- struct ahd_initiator_tinfo *tinfo;
- struct ahd_tmode_tstate *tstate;
- u_int our_id;
- u_int target_offset;
- char channel;
-
- /*
- * Force a negotiation to async/narrow on any
- * future command to this device unless a bus
- * reset occurs between now and that command.
- */
- channel = 'A' + targ->channel;
- our_id = ahd->our_id;
- target_offset = targ->target;
- tinfo = ahd_fetch_transinfo(ahd, channel, our_id,
- targ->target, &tstate);
- ahd_compile_devinfo(&devinfo, our_id, targ->target, CAM_LUN_WILDCARD,
- channel, ROLE_INITIATOR);
- ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
- AHD_TRANS_GOAL, /*paused*/FALSE);
- ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
- AHD_TRANS_GOAL, /*paused*/FALSE);
- ahd_update_neg_request(ahd, &devinfo, tstate, tinfo, AHD_NEG_ALWAYS);
- ahd->platform_data->targets[target_offset] = NULL;
- if (targ->inq_data != NULL)
- free(targ->inq_data, M_DEVBUF);
- if (targ->dv_buffer != NULL)
- free(targ->dv_buffer, M_DEVBUF);
- if (targ->dv_buffer1 != NULL)
- free(targ->dv_buffer1, M_DEVBUF);
- free(targ, M_DEVBUF);
+ dev->openings = 1;
+ ahd_platform_set_tags(ahd, &devinfo,
+ (dev->flags & AHD_DEV_Q_BASIC)
+ ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
+ ahd_set_scsi_status(scb, SCSI_STATUS_BUSY);
+ }
}
-static struct ahd_linux_device*
-ahd_linux_alloc_device(struct ahd_softc *ahd,
- struct ahd_linux_target *targ, u_int lun)
+static void
+ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
{
- struct ahd_linux_device *dev;
-
- dev = malloc(sizeof(*dev), M_DEVBUG, M_NOWAIT);
- if (dev == NULL)
- return (NULL);
- memset(dev, 0, sizeof(*dev));
- init_timer(&dev->timer);
- dev->flags = AHD_DEV_UNCONFIGURED;
- dev->lun = lun;
- dev->target = targ;
-
/*
- * We start out life using untagged
- * transactions of which we allow one.
+ * Map CAM error codes into Linux Error codes. We
+ * avoid the conversion so that the DV code has the
+ * full error information available when making
+ * state change decisions.
*/
- dev->openings = 1;
+ {
+ uint32_t status;
+ u_int new_status;
- /*
- * Set maxtags to 0. This will be changed if we
- * later determine that we are dealing with
- * a tagged queuing capable device.
- */
- dev->maxtags = 0;
-
- targ->refcount++;
- targ->devices[lun] = dev;
- return (dev);
+ status = ahd_cmd_get_transaction_status(cmd);
+ switch (status) {
+ case CAM_REQ_INPROG:
+ case CAM_REQ_CMP:
+ case CAM_SCSI_STATUS_ERROR:
+ new_status = DID_OK;
+ break;
+ case CAM_REQ_ABORTED:
+ new_status = DID_ABORT;
+ break;
+ case CAM_BUSY:
+ new_status = DID_BUS_BUSY;
+ break;
+ case CAM_REQ_INVALID:
+ case CAM_PATH_INVALID:
+ new_status = DID_BAD_TARGET;
+ break;
+ case CAM_SEL_TIMEOUT:
+ new_status = DID_NO_CONNECT;
+ break;
+ case CAM_SCSI_BUS_RESET:
+ case CAM_BDR_SENT:
+ new_status = DID_RESET;
+ break;
+ case CAM_UNCOR_PARITY:
+ new_status = DID_PARITY;
+ break;
+ case CAM_CMD_TIMEOUT:
+ new_status = DID_TIME_OUT;
+ break;
+ case CAM_UA_ABORT:
+ case CAM_REQ_CMP_ERR:
+ case CAM_AUTOSENSE_FAIL:
+ case CAM_NO_HBA:
+ case CAM_DATA_RUN_ERR:
+ case CAM_UNEXP_BUSFREE:
+ case CAM_SEQUENCE_FAIL:
+ case CAM_CCB_LEN_ERR:
+ case CAM_PROVIDE_FAIL:
+ case CAM_REQ_TERMIO:
+ case CAM_UNREC_HBA_ERROR:
+ case CAM_REQ_TOO_BIG:
+ new_status = DID_ERROR;
+ break;
+ case CAM_REQUEUE_REQ:
+ new_status = DID_REQUEUE;
+ break;
+ default:
+ /* We should never get here */
+ new_status = DID_ERROR;
+ break;
+ }
+
+ ahd_cmd_set_transaction_status(cmd, new_status);
+ }
+
+ cmd->scsi_done(cmd);
}
static void
-ahd_linux_free_device(struct ahd_softc *ahd, struct ahd_linux_device *dev)
+ahd_linux_sem_timeout(u_long arg)
{
- struct ahd_linux_target *targ;
+ struct ahd_softc *ahd;
+ u_long s;
- del_timer(&dev->timer);
- targ = dev->target;
- targ->devices[dev->lun] = NULL;
- free(dev, M_DEVBUF);
- targ->refcount--;
- if (targ->refcount == 0
- && (targ->flags & AHD_DV_REQUIRED) == 0)
- ahd_linux_free_target(ahd, targ);
+ ahd = (struct ahd_softc *)arg;
+
+ ahd_lock(ahd, &s);
+ if ((ahd->platform_data->flags & AHD_SCB_UP_EH_SEM) != 0) {
+ ahd->platform_data->flags &= ~AHD_SCB_UP_EH_SEM;
+ up(&ahd->platform_data->eh_sem);
+ }
+ ahd_unlock(ahd, &s);
}
void
-ahd_send_async(struct ahd_softc *ahd, char channel,
- u_int target, u_int lun, ac_code code, void *arg)
+ahd_freeze_simq(struct ahd_softc *ahd)
{
- switch (code) {
- case AC_TRANSFER_NEG:
- {
- char buf[80];
- struct ahd_linux_target *targ;
- struct info_str info;
- struct ahd_initiator_tinfo *tinfo;
- struct ahd_tmode_tstate *tstate;
-
- info.buffer = buf;
- info.length = sizeof(buf);
- info.offset = 0;
- info.pos = 0;
- tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
- target, &tstate);
-
- /*
- * Don't bother reporting results while
- * negotiations are still pending.
- */
- if (tinfo->curr.period != tinfo->goal.period
- || tinfo->curr.width != tinfo->goal.width
- || tinfo->curr.offset != tinfo->goal.offset
- || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
- if (bootverbose == 0)
- break;
-
- /*
- * Don't bother reporting results that
- * are identical to those last reported.
- */
- targ = ahd->platform_data->targets[target];
- if (targ == NULL)
- break;
- if (tinfo->curr.period == targ->last_tinfo.period
- && tinfo->curr.width == targ->last_tinfo.width
- && tinfo->curr.offset == targ->last_tinfo.offset
- && tinfo->curr.ppr_options == targ->last_tinfo.ppr_options)
- if (bootverbose == 0)
- break;
-
- targ->last_tinfo.period = tinfo->curr.period;
- targ->last_tinfo.width = tinfo->curr.width;
- targ->last_tinfo.offset = tinfo->curr.offset;
- targ->last_tinfo.ppr_options = tinfo->curr.ppr_options;
-
- printf("(%s:%c:", ahd_name(ahd), channel);
- if (target == CAM_TARGET_WILDCARD)
- printf("*): ");
- else
- printf("%d): ", target);
- ahd_format_transinfo(&info, &tinfo->curr);
- if (info.pos < info.length)
- *info.buffer = '\0';
- else
- buf[info.length - 1] = '\0';
- printf("%s", buf);
- break;
- }
- case AC_SENT_BDR:
- {
- WARN_ON(lun != CAM_LUN_WILDCARD);
- scsi_report_device_reset(ahd->platform_data->host,
- channel - 'A', target);
- break;
+ ahd->platform_data->qfrozen++;
+ if (ahd->platform_data->qfrozen == 1) {
+ scsi_block_requests(ahd->platform_data->host);
+ ahd_platform_abort_scbs(ahd, CAM_TARGET_WILDCARD, ALL_CHANNELS,
+ CAM_LUN_WILDCARD, SCB_LIST_NULL,
+ ROLE_INITIATOR, CAM_REQUEUE_REQ);
}
- case AC_BUS_RESET:
- if (ahd->platform_data->host != NULL) {
- scsi_report_bus_reset(ahd->platform_data->host,
- channel - 'A');
- }
- break;
- default:
- panic("ahd_send_async: Unexpected async event");
- }
}
-/*
- * Calls the higher level scsi done function and frees the scb.
- */
void
-ahd_done(struct ahd_softc *ahd, struct scb *scb)
+ahd_release_simq(struct ahd_softc *ahd)
{
- Scsi_Cmnd *cmd;
- struct ahd_linux_device *dev;
+ u_long s;
+ int unblock_reqs;
- if ((scb->flags & SCB_ACTIVE) == 0) {
- printf("SCB %d done'd twice\n", SCB_GET_TAG(scb));
- ahd_dump_card_state(ahd);
- panic("Stopping for safety");
- }
- LIST_REMOVE(scb, pending_links);
- cmd = scb->io_ctx;
- dev = scb->platform_data->dev;
- dev->active--;
- dev->openings++;
- if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
- cmd->result &= ~(CAM_DEV_QFRZN << 16);
- dev->qfrozen--;
+ unblock_reqs = 0;
+ ahd_lock(ahd, &s);
+ if (ahd->platform_data->qfrozen > 0)
+ ahd->platform_data->qfrozen--;
+ if (ahd->platform_data->qfrozen == 0) {
+ unblock_reqs = 1;
}
- ahd_linux_unmap_scb(ahd, scb);
-
+ ahd_unlock(ahd, &s);
/*
- * Guard against stale sense data.
- * The Linux mid-layer assumes that sense
- * was retrieved anytime the first byte of
- * the sense buffer looks "sane".
+ * There is still a race here. The mid-layer
+ * should keep its own freeze count and use
+ * a bottom half handler to run the queues
+ * so we can unblock with our own lock held.
*/
- cmd->sense_buffer[0] = 0;
- if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
- uint32_t amount_xferred;
+ if (unblock_reqs)
+ scsi_unblock_requests(ahd->platform_data->host);
+}
- amount_xferred =
- ahd_get_transfer_length(scb) - ahd_get_residual(scb);
- if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
-#ifdef AHD_DEBUG
- if ((ahd_debug & AHD_SHOW_MISC) != 0) {
- ahd_print_path(ahd, scb);
- printf("Set CAM_UNCOR_PARITY\n");
- }
-#endif
- ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
-#ifdef AHD_REPORT_UNDERFLOWS
- /*
- * This code is disabled by default as some
- * clients of the SCSI system do not properly
- * initialize the underflow parameter. This
- * results in spurious termination of commands
- * that complete as expected (e.g. underflow is
- * allowed as command can return variable amounts
- * of data.
- */
- } else if (amount_xferred < scb->io_ctx->underflow) {
- u_int i;
+static int
+ahd_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
+{
+ struct ahd_softc *ahd;
+ struct ahd_linux_device *dev;
+ struct scb *pending_scb;
+ u_int saved_scbptr;
+ u_int active_scbptr;
+ u_int last_phase;
+ u_int saved_scsiid;
+ u_int cdb_byte;
+ int retval;
+ int was_paused;
+ int paused;
+ int wait;
+ int disconnected;
+ ahd_mode_state saved_modes;
+
+ pending_scb = NULL;
+ paused = FALSE;
+ wait = FALSE;
+ ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
+
+ printf("%s:%d:%d:%d: Attempting to queue a%s message:",
+ ahd_name(ahd), cmd->device->channel,
+ cmd->device->id, cmd->device->lun,
+ flag == SCB_ABORT ? "n ABORT" : " TARGET RESET");
+
+ printf("CDB:");
+ for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
+ printf(" 0x%x", cmd->cmnd[cdb_byte]);
+ printf("\n");
+
+ spin_lock_irq(&ahd->platform_data->spin_lock);
- ahd_print_path(ahd, scb);
- printf("CDB:");
- for (i = 0; i < scb->io_ctx->cmd_len; i++)
- printf(" 0x%x", scb->io_ctx->cmnd[i]);
- printf("\n");
- ahd_print_path(ahd, scb);
- printf("Saw underflow (%ld of %ld bytes). "
- "Treated as error\n",
- ahd_get_residual(scb),
- ahd_get_transfer_length(scb));
- ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
-#endif
- } else {
- ahd_set_transaction_status(scb, CAM_REQ_CMP);
- }
- } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
- ahd_linux_handle_scsi_status(ahd, dev, scb);
- } else if (ahd_get_transaction_status(scb) == CAM_SEL_TIMEOUT) {
- dev->flags |= AHD_DEV_UNCONFIGURED;
- if (AHD_DV_CMD(cmd) == FALSE)
- dev->target->flags &= ~AHD_DV_REQUIRED;
- }
/*
- * Start DV for devices that require it assuming the first command
- * sent does not result in a selection timeout.
+ * First determine if we currently own this command.
+ * Start by searching the device queue. If not found
+ * there, check the pending_scb list. If not found
+ * at all, and the system wanted us to just abort the
+ * command, return success.
*/
- if (ahd_get_transaction_status(scb) != CAM_SEL_TIMEOUT
- && (dev->target->flags & AHD_DV_REQUIRED) != 0)
- ahd_linux_start_dv(ahd);
+ dev = scsi_transport_device_data(cmd->device);
+
+ if (dev == NULL) {
+ /*
+ * No target device for this command exists,
+ * so we must not still own the command.
+ */
+ printf("%s:%d:%d:%d: Is not an active device\n",
+ ahd_name(ahd), cmd->device->channel, cmd->device->id,
+ cmd->device->lun);
+ retval = SUCCESS;
+ goto no_cmd;
+ }
- if (dev->openings == 1
- && ahd_get_transaction_status(scb) == CAM_REQ_CMP
- && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
- dev->tag_success_count++;
/*
- * Some devices deal with temporary internal resource
- * shortages by returning queue full. When the queue
- * full occurrs, we throttle back. Slowly try to get
- * back to our previous queue depth.
+ * See if we can find a matching cmd in the pending list.
*/
- if ((dev->openings + dev->active) < dev->maxtags
- && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
- dev->tag_success_count = 0;
- dev->openings++;
+ LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
+ if (pending_scb->io_ctx == cmd)
+ break;
}
- if (dev->active == 0)
- dev->commands_since_idle_or_otag = 0;
-
- if ((dev->flags & AHD_DEV_UNCONFIGURED) != 0
- && dev->active == 0
- && (dev->flags & AHD_DEV_TIMER_ACTIVE) == 0)
- ahd_linux_free_device(ahd, dev);
+ if (pending_scb == NULL && flag == SCB_DEVICE_RESET) {
- if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
- printf("Recovery SCB completes\n");
- if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
- || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
- ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
- if ((scb->platform_data->flags & AHD_SCB_UP_EH_SEM) != 0) {
- scb->platform_data->flags &= ~AHD_SCB_UP_EH_SEM;
- up(&ahd->platform_data->eh_sem);
+ /* Any SCB for this device will do for a target reset */
+ LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
+ if (ahd_match_scb(ahd, pending_scb, cmd->device->id,
+ cmd->device->channel + 'A',
+ CAM_LUN_WILDCARD,
+ SCB_LIST_NULL, ROLE_INITIATOR) == 0)
+ break;
}
}
- ahd_free_scb(ahd, scb);
- ahd_linux_queue_cmd_complete(ahd, cmd);
-
- if ((ahd->platform_data->flags & AHD_DV_WAIT_SIMQ_EMPTY) != 0
- && LIST_FIRST(&ahd->pending_scbs) == NULL) {
- ahd->platform_data->flags &= ~AHD_DV_WAIT_SIMQ_EMPTY;
- up(&ahd->platform_data->dv_sem);
+ if (pending_scb == NULL) {
+ printf("%s:%d:%d:%d: Command not found\n",
+ ahd_name(ahd), cmd->device->channel, cmd->device->id,
+ cmd->device->lun);
+ goto no_cmd;
}
-}
-static void
-ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
- struct ahd_linux_device *dev, struct scb *scb)
-{
- struct ahd_devinfo devinfo;
+ if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
+ /*
+ * We can't queue two recovery actions using the same SCB
+ */
+ retval = FAILED;
+ goto done;
+ }
- ahd_compile_devinfo(&devinfo,
- ahd->our_id,
- dev->target->target, dev->lun,
- dev->target->channel == 0 ? 'A' : 'B',
- ROLE_INITIATOR);
-
/*
- * We don't currently trust the mid-layer to
- * properly deal with queue full or busy. So,
- * when one occurs, we tell the mid-layer to
- * unconditionally requeue the command to us
- * so that we can retry it ourselves. We also
- * implement our own throttling mechanism so
- * we don't clobber the device with too many
- * commands.
+ * Ensure that the card doesn't do anything
+ * behind our back. Also make sure that we
+ * didn't "just" miss an interrupt that would
+ * affect this cmd.
*/
- switch (ahd_get_scsi_status(scb)) {
- default:
- break;
- case SCSI_STATUS_CHECK_COND:
- case SCSI_STATUS_CMD_TERMINATED:
- {
- Scsi_Cmnd *cmd;
+ was_paused = ahd_is_paused(ahd);
+ ahd_pause_and_flushwork(ahd);
+ paused = TRUE;
- /*
- * Copy sense information to the OS's cmd
- * structure if it is available.
- */
- cmd = scb->io_ctx;
- if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
- struct scsi_status_iu_header *siu;
- u_int sense_size;
- u_int sense_offset;
+ if ((pending_scb->flags & SCB_ACTIVE) == 0) {
+ printf("%s:%d:%d:%d: Command already completed\n",
+ ahd_name(ahd), cmd->device->channel, cmd->device->id,
+ cmd->device->lun);
+ goto no_cmd;
+ }
- if (scb->flags & SCB_SENSE) {
- sense_size = MIN(sizeof(struct scsi_sense_data)
- - ahd_get_sense_residual(scb),
- sizeof(cmd->sense_buffer));
- sense_offset = 0;
- } else {
- /*
- * Copy only the sense data into the provided
- * buffer.
- */
- siu = (struct scsi_status_iu_header *)
- scb->sense_data;
- sense_size = MIN(scsi_4btoul(siu->sense_length),
- sizeof(cmd->sense_buffer));
- sense_offset = SIU_SENSE_OFFSET(siu);
- }
+ printf("%s: At time of recovery, card was %spaused\n",
+ ahd_name(ahd), was_paused ? "" : "not ");
+ ahd_dump_card_state(ahd);
- memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
- memcpy(cmd->sense_buffer,
- ahd_get_sense_buf(ahd, scb)
- + sense_offset, sense_size);
- cmd->result |= (DRIVER_SENSE << 24);
+ disconnected = TRUE;
+ if (flag == SCB_ABORT) {
+ if (ahd_search_qinfifo(ahd, cmd->device->id,
+ cmd->device->channel + 'A',
+ cmd->device->lun,
+ pending_scb->hscb->tag,
+ ROLE_INITIATOR, CAM_REQ_ABORTED,
+ SEARCH_COMPLETE) > 0) {
+ printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
+ ahd_name(ahd), cmd->device->channel,
+ cmd->device->id, cmd->device->lun);
+ retval = SUCCESS;
+ goto done;
+ }
+ } else if (ahd_search_qinfifo(ahd, cmd->device->id,
+ cmd->device->channel + 'A',
+ cmd->device->lun, pending_scb->hscb->tag,
+ ROLE_INITIATOR, /*status*/0,
+ SEARCH_COUNT) > 0) {
+ disconnected = FALSE;
+ }
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_SENSE) {
- int i;
+ saved_modes = ahd_save_modes(ahd);
+ ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
+ last_phase = ahd_inb(ahd, LASTPHASE);
+ saved_scbptr = ahd_get_scbptr(ahd);
+ active_scbptr = saved_scbptr;
+ if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
+ struct scb *bus_scb;
- printf("Copied %d bytes of sense data at %d:",
- sense_size, sense_offset);
- for (i = 0; i < sense_size; i++) {
- if ((i & 0xF) == 0)
- printf("\n");
- printf("0x%x ", cmd->sense_buffer[i]);
- }
- printf("\n");
- }
-#endif
- }
- break;
+ bus_scb = ahd_lookup_scb(ahd, active_scbptr);
+ if (bus_scb == pending_scb)
+ disconnected = FALSE;
+ else if (flag != SCB_ABORT
+ && ahd_inb(ahd, SAVED_SCSIID) == pending_scb->hscb->scsiid
+ && ahd_inb(ahd, SAVED_LUN) == SCB_GET_LUN(pending_scb))
+ disconnected = FALSE;
}
- case SCSI_STATUS_QUEUE_FULL:
- {
+
+ /*
+ * At this point, pending_scb is the scb associated with the
+ * passed in command. That command is currently active on the
+ * bus or is in the disconnected state.
+ */
+ saved_scsiid = ahd_inb(ahd, SAVED_SCSIID);
+ if (last_phase != P_BUSFREE
+ && (SCB_GET_TAG(pending_scb) == active_scbptr
+ || (flag == SCB_DEVICE_RESET
+ && SCSIID_TARGET(ahd, saved_scsiid) == cmd->device->id))) {
+
/*
- * By the time the core driver has returned this
- * command, all other commands that were queued
- * to us but not the device have been returned.
- * This ensures that dev->active is equal to
- * the number of commands actually queued to
- * the device.
+ * We're active on the bus, so assert ATN
+ * and hope that the target responds.
*/
- dev->tag_success_count = 0;
- if (dev->active != 0) {
+ pending_scb = ahd_lookup_scb(ahd, active_scbptr);
+ pending_scb->flags |= SCB_RECOVERY_SCB|flag;
+ ahd_outb(ahd, MSG_OUT, HOST_MSG);
+ ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
+ printf("%s:%d:%d:%d: Device is active, asserting ATN\n",
+ ahd_name(ahd), cmd->device->channel,
+ cmd->device->id, cmd->device->lun);
+ wait = TRUE;
+ } else if (disconnected) {
+
+ /*
+ * Actually re-queue this SCB in an attempt
+ * to select the device before it reconnects.
+ */
+ pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
+ ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
+ pending_scb->hscb->cdb_len = 0;
+ pending_scb->hscb->task_attribute = 0;
+ pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;
+
+ if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
/*
- * Drop our opening count to the number
- * of commands currently outstanding.
+ * Mark the SCB has having an outstanding
+ * task management function. Should the command
+ * complete normally before the task management
+ * function can be sent, the host will be notified
+ * to abort our requeued SCB.
*/
- dev->openings = 0;
-#ifdef AHD_DEBUG
- if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
- ahd_print_path(ahd, scb);
- printf("Dropping tag count to %d\n",
- dev->active);
- }
-#endif
- if (dev->active == dev->tags_on_last_queuefull) {
-
- dev->last_queuefull_same_count++;
- /*
- * If we repeatedly see a queue full
- * at the same queue depth, this
- * device has a fixed number of tag
- * slots. Lock in this tag depth
- * so we stop seeing queue fulls from
- * this device.
- */
- if (dev->last_queuefull_same_count
- == AHD_LOCK_TAGS_COUNT) {
- dev->maxtags = dev->active;
- ahd_print_path(ahd, scb);
- printf("Locking max tag count at %d\n",
- dev->active);
- }
- } else {
- dev->tags_on_last_queuefull = dev->active;
- dev->last_queuefull_same_count = 0;
- }
- ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
- ahd_set_scsi_status(scb, SCSI_STATUS_OK);
- ahd_platform_set_tags(ahd, &devinfo,
- (dev->flags & AHD_DEV_Q_BASIC)
- ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
- break;
+ ahd_outb(ahd, SCB_TASK_MANAGEMENT,
+ pending_scb->hscb->task_management);
+ } else {
+ /*
+ * If non-packetized, set the MK_MESSAGE control
+ * bit indicating that we desire to send a message.
+ * We also set the disconnected flag since there is
+ * no guarantee that our SCB control byte matches
+ * the version on the card. We don't want the
+ * sequencer to abort the command thinking an
+ * unsolicited reselection occurred.
+ */
+ pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
+
+ /*
+ * The sequencer will never re-reference the
+ * in-core SCB. To make sure we are notified
+ * during reslection, set the MK_MESSAGE flag in
+ * the card's copy of the SCB.
+ */
+ ahd_outb(ahd, SCB_CONTROL,
+ ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
}
+
/*
- * Drop down to a single opening, and treat this
- * as if the target returned BUSY SCSI status.
- */
- dev->openings = 1;
- ahd_platform_set_tags(ahd, &devinfo,
- (dev->flags & AHD_DEV_Q_BASIC)
- ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
- ahd_set_scsi_status(scb, SCSI_STATUS_BUSY);
- /* FALLTHROUGH */
- }
- case SCSI_STATUS_BUSY:
- /*
- * Set a short timer to defer sending commands for
- * a bit since Linux will not delay in this case.
+ * Clear out any entries in the QINFIFO first
+ * so we are the next SCB for this target
+ * to run.
*/
- if ((dev->flags & AHD_DEV_TIMER_ACTIVE) != 0) {
- printf("%s:%c:%d: Device Timer still active during "
- "busy processing\n", ahd_name(ahd),
- dev->target->channel, dev->target->target);
- break;
- }
- dev->flags |= AHD_DEV_TIMER_ACTIVE;
- dev->qfrozen++;
- init_timer(&dev->timer);
- dev->timer.data = (u_long)dev;
- dev->timer.expires = jiffies + (HZ/2);
- dev->timer.function = ahd_linux_dev_timed_unfreeze;
- add_timer(&dev->timer);
- break;
+ ahd_search_qinfifo(ahd, cmd->device->id,
+ cmd->device->channel + 'A', cmd->device->lun,
+ SCB_LIST_NULL, ROLE_INITIATOR,
+ CAM_REQUEUE_REQ, SEARCH_COMPLETE);
+ ahd_qinfifo_requeue_tail(ahd, pending_scb);
+ ahd_set_scbptr(ahd, saved_scbptr);
+ ahd_print_path(ahd, pending_scb);
+ printf("Device is disconnected, re-queuing SCB\n");
+ wait = TRUE;
+ } else {
+ printf("%s:%d:%d:%d: Unable to deliver message\n",
+ ahd_name(ahd), cmd->device->channel,
+ cmd->device->id, cmd->device->lun);
+ retval = FAILED;
+ goto done;
}
-}
-
-static void
-ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, Scsi_Cmnd *cmd)
-{
- /*
- * Typically, the complete queue has very few entries
- * queued to it before the queue is emptied by
- * ahd_linux_run_complete_queue, so sorting the entries
- * by generation number should be inexpensive.
- * We perform the sort so that commands that complete
- * with an error are retuned in the order origionally
- * queued to the controller so that any subsequent retries
- * are performed in order. The underlying ahd routines do
- * not guarantee the order that aborted commands will be
- * returned to us.
- */
- struct ahd_completeq *completeq;
- struct ahd_cmd *list_cmd;
- struct ahd_cmd *acmd;
+no_cmd:
/*
- * Map CAM error codes into Linux Error codes. We
- * avoid the conversion so that the DV code has the
- * full error information available when making
- * state change decisions.
+ * Our assumption is that if we don't have the command, no
+ * recovery action was required, so we return success. Again,
+ * the semantics of the mid-layer recovery engine are not
+ * well defined, so this may change in time.
*/
- if (AHD_DV_CMD(cmd) == FALSE) {
- uint32_t status;
- u_int new_status;
+ retval = SUCCESS;
+done:
+ if (paused)
+ ahd_unpause(ahd);
+ if (wait) {
+ struct timer_list timer;
+ int ret;
- status = ahd_cmd_get_transaction_status(cmd);
- if (status != CAM_REQ_CMP) {
- struct ahd_linux_device *dev;
- struct ahd_devinfo devinfo;
- cam_status cam_status;
- uint32_t action;
- u_int scsi_status;
-
- dev = ahd_linux_get_device(ahd, cmd->device->channel,
- cmd->device->id,
- cmd->device->lun,
- /*alloc*/FALSE);
-
- if (dev == NULL)
- goto no_fallback;
-
- ahd_compile_devinfo(&devinfo,
- ahd->our_id,
- dev->target->target, dev->lun,
- dev->target->channel == 0 ? 'A':'B',
- ROLE_INITIATOR);
-
- scsi_status = ahd_cmd_get_scsi_status(cmd);
- cam_status = ahd_cmd_get_transaction_status(cmd);
- action = aic_error_action(cmd, dev->target->inq_data,
- cam_status, scsi_status);
- if ((action & SSQ_FALLBACK) != 0) {
-
- /* Update stats */
- dev->target->errors_detected++;
- if (dev->target->cmds_since_error == 0)
- dev->target->cmds_since_error++;
- else {
- dev->target->cmds_since_error = 0;
- ahd_linux_fallback(ahd, &devinfo);
- }
- }
- }
-no_fallback:
- switch (status) {
- case CAM_REQ_INPROG:
- case CAM_REQ_CMP:
- case CAM_SCSI_STATUS_ERROR:
- new_status = DID_OK;
- break;
- case CAM_REQ_ABORTED:
- new_status = DID_ABORT;
- break;
- case CAM_BUSY:
- new_status = DID_BUS_BUSY;
- break;
- case CAM_REQ_INVALID:
- case CAM_PATH_INVALID:
- new_status = DID_BAD_TARGET;
- break;
- case CAM_SEL_TIMEOUT:
- new_status = DID_NO_CONNECT;
- break;
- case CAM_SCSI_BUS_RESET:
- case CAM_BDR_SENT:
- new_status = DID_RESET;
- break;
- case CAM_UNCOR_PARITY:
- new_status = DID_PARITY;
- break;
- case CAM_CMD_TIMEOUT:
- new_status = DID_TIME_OUT;
- break;
- case CAM_UA_ABORT:
- case CAM_REQ_CMP_ERR:
- case CAM_AUTOSENSE_FAIL:
- case CAM_NO_HBA:
- case CAM_DATA_RUN_ERR:
- case CAM_UNEXP_BUSFREE:
- case CAM_SEQUENCE_FAIL:
- case CAM_CCB_LEN_ERR:
- case CAM_PROVIDE_FAIL:
- case CAM_REQ_TERMIO:
- case CAM_UNREC_HBA_ERROR:
- case CAM_REQ_TOO_BIG:
- new_status = DID_ERROR;
- break;
- case CAM_REQUEUE_REQ:
- /*
- * If we want the request requeued, make sure there
- * are sufficent retries. In the old scsi error code,
- * we used to be able to specify a result code that
- * bypassed the retry count. Now we must use this
- * hack. We also "fake" a check condition with
- * a sense code of ABORTED COMMAND. This seems to
- * evoke a retry even if this command is being sent
- * via the eh thread. Ick! Ick! Ick!
- */
- if (cmd->retries > 0)
- cmd->retries--;
- new_status = DID_OK;
- ahd_cmd_set_scsi_status(cmd, SCSI_STATUS_CHECK_COND);
- cmd->result |= (DRIVER_SENSE << 24);
- memset(cmd->sense_buffer, 0,
- sizeof(cmd->sense_buffer));
- cmd->sense_buffer[0] = SSD_ERRCODE_VALID
- | SSD_CURRENT_ERROR;
- cmd->sense_buffer[2] = SSD_KEY_ABORTED_COMMAND;
- break;
- default:
- /* We should never get here */
- new_status = DID_ERROR;
- break;
+ ahd->platform_data->flags |= AHD_SCB_UP_EH_SEM;
+ spin_unlock_irq(&ahd->platform_data->spin_lock);
+ init_timer(&timer);
+ timer.data = (u_long)ahd;
+ timer.expires = jiffies + (5 * HZ);
+ timer.function = ahd_linux_sem_timeout;
+ add_timer(&timer);
+ printf("Recovery code sleeping\n");
+ down(&ahd->platform_data->eh_sem);
+ printf("Recovery code awake\n");
+ ret = del_timer_sync(&timer);
+ if (ret == 0) {
+ printf("Timer Expired\n");
+ retval = FAILED;
}
-
- ahd_cmd_set_transaction_status(cmd, new_status);
+ spin_lock_irq(&ahd->platform_data->spin_lock);
}
-
- completeq = &ahd->platform_data->completeq;
- list_cmd = TAILQ_FIRST(completeq);
- acmd = (struct ahd_cmd *)cmd;
- while (list_cmd != NULL
- && acmd_scsi_cmd(list_cmd).serial_number
- < acmd_scsi_cmd(acmd).serial_number)
- list_cmd = TAILQ_NEXT(list_cmd, acmd_links.tqe);
- if (list_cmd != NULL)
- TAILQ_INSERT_BEFORE(list_cmd, acmd, acmd_links.tqe);
- else
- TAILQ_INSERT_TAIL(completeq, acmd, acmd_links.tqe);
+ spin_unlock_irq(&ahd->platform_data->spin_lock);
+ return (retval);
}
-static void
-ahd_linux_filter_inquiry(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
+static void ahd_linux_exit(void);
+
+static void ahd_linux_set_width(struct scsi_target *starget, int width)
{
- struct scsi_inquiry_data *sid;
- struct ahd_initiator_tinfo *tinfo;
- struct ahd_transinfo *user;
- struct ahd_transinfo *goal;
- struct ahd_transinfo *curr;
- struct ahd_tmode_tstate *tstate;
- struct ahd_linux_device *dev;
- u_int width;
- u_int period;
- u_int offset;
- u_int ppr_options;
- u_int trans_version;
- u_int prot_version;
+ struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+ struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
+ struct ahd_devinfo devinfo;
+ unsigned long flags;
- /*
- * Determine if this lun actually exists. If so,
- * hold on to its corresponding device structure.
- * If not, make sure we release the device and
- * don't bother processing the rest of this inquiry
- * command.
- */
- dev = ahd_linux_get_device(ahd, devinfo->channel - 'A',
- devinfo->target, devinfo->lun,
- /*alloc*/TRUE);
+ ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
+ starget->channel + 'A', ROLE_INITIATOR);
+ ahd_lock(ahd, &flags);
+ ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE);
+ ahd_unlock(ahd, &flags);
+}
+
+static void ahd_linux_set_period(struct scsi_target *starget, int period)
+{
+ struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+ struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
+ struct ahd_tmode_tstate *tstate;
+ struct ahd_initiator_tinfo *tinfo
+ = ahd_fetch_transinfo(ahd,
+ starget->channel + 'A',
+ shost->this_id, starget->id, &tstate);
+ struct ahd_devinfo devinfo;
+ unsigned int ppr_options = tinfo->goal.ppr_options;
+ unsigned long flags;
+ unsigned long offset = tinfo->goal.offset;
- sid = (struct scsi_inquiry_data *)dev->target->inq_data;
- if (SID_QUAL(sid) == SID_QUAL_LU_CONNECTED) {
+ if (offset == 0)
+ offset = MAX_OFFSET;
- dev->flags &= ~AHD_DEV_UNCONFIGURED;
- } else {
- dev->flags |= AHD_DEV_UNCONFIGURED;
- return;
+ if (period < 8)
+ period = 8;
+ if (period < 10) {
+ ppr_options |= MSG_EXT_PPR_DT_REQ;
+ if (period == 8)
+ ppr_options |= MSG_EXT_PPR_IU_REQ;
}
- /*
- * Update our notion of this device's transfer
- * negotiation capabilities.
- */
- tinfo = ahd_fetch_transinfo(ahd, devinfo->channel,
- devinfo->our_scsiid,
- devinfo->target, &tstate);
- user = &tinfo->user;
- goal = &tinfo->goal;
- curr = &tinfo->curr;
- width = user->width;
- period = user->period;
- offset = user->offset;
- ppr_options = user->ppr_options;
- trans_version = user->transport_version;
- prot_version = MIN(user->protocol_version, SID_ANSI_REV(sid));
+ ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
+ starget->channel + 'A', ROLE_INITIATOR);
- /*
- * Only attempt SPI3/4 once we've verified that
- * the device claims to support SPI3/4 features.
- */
- if (prot_version < SCSI_REV_2)
- trans_version = SID_ANSI_REV(sid);
- else
- trans_version = SCSI_REV_2;
-
- if ((sid->flags & SID_WBus16) == 0)
- width = MSG_EXT_WDTR_BUS_8_BIT;
- if ((sid->flags & SID_Sync) == 0) {
- period = 0;
- offset = 0;
- ppr_options = 0;
+ /* all PPR requests apart from QAS require wide transfers */
+ if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
+ if (spi_width(starget) == 0)
+ ppr_options &= MSG_EXT_PPR_QAS_REQ;
}
- if ((sid->spi3data & SID_SPI_QAS) == 0)
- ppr_options &= ~MSG_EXT_PPR_QAS_REQ;
- if ((sid->spi3data & SID_SPI_CLOCK_DT) == 0)
- ppr_options &= MSG_EXT_PPR_QAS_REQ;
- if ((sid->spi3data & SID_SPI_IUS) == 0)
- ppr_options &= (MSG_EXT_PPR_DT_REQ
- | MSG_EXT_PPR_QAS_REQ);
-
- if (prot_version > SCSI_REV_2
- && ppr_options != 0)
- trans_version = user->transport_version;
-
- ahd_validate_width(ahd, /*tinfo limit*/NULL, &width, ROLE_UNKNOWN);
+
ahd_find_syncrate(ahd, &period, &ppr_options, AHD_SYNCRATE_MAX);
- ahd_validate_offset(ahd, /*tinfo limit*/NULL, period,
- &offset, width, ROLE_UNKNOWN);
- if (offset == 0 || period == 0) {
- period = 0;
- offset = 0;
- ppr_options = 0;
- }
- /* Apply our filtered user settings. */
- curr->transport_version = trans_version;
- curr->protocol_version = prot_version;
- ahd_set_width(ahd, devinfo, width, AHD_TRANS_GOAL, /*paused*/FALSE);
- ahd_set_syncrate(ahd, devinfo, period, offset, ppr_options,
- AHD_TRANS_GOAL, /*paused*/FALSE);
+ ahd_lock(ahd, &flags);
+ ahd_set_syncrate(ahd, &devinfo, period, offset,
+ ppr_options, AHD_TRANS_GOAL, FALSE);
+ ahd_unlock(ahd, &flags);
}
-void
-ahd_freeze_simq(struct ahd_softc *ahd)
+static void ahd_linux_set_offset(struct scsi_target *starget, int offset)
{
- ahd->platform_data->qfrozen++;
- if (ahd->platform_data->qfrozen == 1) {
- scsi_block_requests(ahd->platform_data->host);
- ahd_platform_abort_scbs(ahd, CAM_TARGET_WILDCARD, ALL_CHANNELS,
- CAM_LUN_WILDCARD, SCB_LIST_NULL,
- ROLE_INITIATOR, CAM_REQUEUE_REQ);
+ struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+ struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
+ struct ahd_tmode_tstate *tstate;
+ struct ahd_initiator_tinfo *tinfo
+ = ahd_fetch_transinfo(ahd,
+ starget->channel + 'A',
+ shost->this_id, starget->id, &tstate);
+ struct ahd_devinfo devinfo;
+ unsigned int ppr_options = 0;
+ unsigned int period = 0;
+ unsigned long flags;
+
+ ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
+ starget->channel + 'A', ROLE_INITIATOR);
+ if (offset != 0) {
+ period = tinfo->goal.period;
+ ppr_options = tinfo->goal.ppr_options;
+ ahd_find_syncrate(ahd, &period, &ppr_options, AHD_SYNCRATE_MAX);
}
+ ahd_lock(ahd, &flags);
+ ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options,
+ AHD_TRANS_GOAL, FALSE);
+ ahd_unlock(ahd, &flags);
}
-void
-ahd_release_simq(struct ahd_softc *ahd)
+static void ahd_linux_set_dt(struct scsi_target *starget, int dt)
{
- u_long s;
- int unblock_reqs;
-
- unblock_reqs = 0;
- ahd_lock(ahd, &s);
- if (ahd->platform_data->qfrozen > 0)
- ahd->platform_data->qfrozen--;
- if (ahd->platform_data->qfrozen == 0) {
- unblock_reqs = 1;
- }
- if (AHD_DV_SIMQ_FROZEN(ahd)
- && ((ahd->platform_data->flags & AHD_DV_WAIT_SIMQ_RELEASE) != 0)) {
- ahd->platform_data->flags &= ~AHD_DV_WAIT_SIMQ_RELEASE;
- up(&ahd->platform_data->dv_sem);
- }
- ahd_unlock(ahd, &s);
- /*
- * There is still a race here. The mid-layer
- * should keep its own freeze count and use
- * a bottom half handler to run the queues
- * so we can unblock with our own lock held.
- */
- if (unblock_reqs)
- scsi_unblock_requests(ahd->platform_data->host);
+ struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+ struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
+ struct ahd_tmode_tstate *tstate;
+ struct ahd_initiator_tinfo *tinfo
+ = ahd_fetch_transinfo(ahd,
+ starget->channel + 'A',
+ shost->this_id, starget->id, &tstate);
+ struct ahd_devinfo devinfo;
+ unsigned int ppr_options = tinfo->goal.ppr_options
+ & ~MSG_EXT_PPR_DT_REQ;
+ unsigned int period = tinfo->goal.period;
+ unsigned long flags;
+
+ if (dt) {
+ ppr_options |= MSG_EXT_PPR_DT_REQ;
+ if (period > 9)
+ period = 9; /* at least 12.5ns for DT */
+ } else if (period <= 9)
+ period = 10; /* If resetting DT, period must be >= 25ns */
+
+ ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
+ starget->channel + 'A', ROLE_INITIATOR);
+ ahd_find_syncrate(ahd, &period, &ppr_options,
+ dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
+ ahd_lock(ahd, &flags);
+ ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
+ ppr_options, AHD_TRANS_GOAL, FALSE);
+ ahd_unlock(ahd, &flags);
}
-static void
-ahd_linux_sem_timeout(u_long arg)
+static void ahd_linux_set_qas(struct scsi_target *starget, int qas)
{
- struct scb *scb;
- struct ahd_softc *ahd;
- u_long s;
-
- scb = (struct scb *)arg;
- ahd = scb->ahd_softc;
- ahd_lock(ahd, &s);
- if ((scb->platform_data->flags & AHD_SCB_UP_EH_SEM) != 0) {
- scb->platform_data->flags &= ~AHD_SCB_UP_EH_SEM;
- up(&ahd->platform_data->eh_sem);
- }
- ahd_unlock(ahd, &s);
+ struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+ struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
+ struct ahd_tmode_tstate *tstate;
+ struct ahd_initiator_tinfo *tinfo
+ = ahd_fetch_transinfo(ahd,
+ starget->channel + 'A',
+ shost->this_id, starget->id, &tstate);
+ struct ahd_devinfo devinfo;
+ unsigned int ppr_options = tinfo->goal.ppr_options
+ & ~MSG_EXT_PPR_QAS_REQ;
+ unsigned int period = tinfo->goal.period;
+ unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
+ unsigned long flags;
+
+ if (qas)
+ ppr_options |= MSG_EXT_PPR_QAS_REQ;
+
+ ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
+ starget->channel + 'A', ROLE_INITIATOR);
+ ahd_find_syncrate(ahd, &period, &ppr_options,
+ dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
+ ahd_lock(ahd, &flags);
+ ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
+ ppr_options, AHD_TRANS_GOAL, FALSE);
+ ahd_unlock(ahd, &flags);
}
-static void
-ahd_linux_dev_timed_unfreeze(u_long arg)
+static void ahd_linux_set_iu(struct scsi_target *starget, int iu)
{
- struct ahd_linux_device *dev;
- struct ahd_softc *ahd;
- u_long s;
+ struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+ struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
+ struct ahd_tmode_tstate *tstate;
+ struct ahd_initiator_tinfo *tinfo
+ = ahd_fetch_transinfo(ahd,
+ starget->channel + 'A',
+ shost->this_id, starget->id, &tstate);
+ struct ahd_devinfo devinfo;
+ unsigned int ppr_options = tinfo->goal.ppr_options
+ & ~MSG_EXT_PPR_IU_REQ;
+ unsigned int period = tinfo->goal.period;
+ unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
+ unsigned long flags;
+
+ if (iu)
+ ppr_options |= MSG_EXT_PPR_IU_REQ;
+
+ ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
+ starget->channel + 'A', ROLE_INITIATOR);
+ ahd_find_syncrate(ahd, &period, &ppr_options,
+ dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
+ ahd_lock(ahd, &flags);
+ ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
+ ppr_options, AHD_TRANS_GOAL, FALSE);
+ ahd_unlock(ahd, &flags);
+}
- dev = (struct ahd_linux_device *)arg;
- ahd = dev->target->ahd;
- ahd_lock(ahd, &s);
- dev->flags &= ~AHD_DEV_TIMER_ACTIVE;
- if (dev->qfrozen > 0)
- dev->qfrozen--;
- if ((dev->flags & AHD_DEV_UNCONFIGURED) != 0
- && dev->active == 0)
- ahd_linux_free_device(ahd, dev);
- ahd_unlock(ahd, &s);
+static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm)
+{
+ struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+ struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
+ struct ahd_tmode_tstate *tstate;
+ struct ahd_initiator_tinfo *tinfo
+ = ahd_fetch_transinfo(ahd,
+ starget->channel + 'A',
+ shost->this_id, starget->id, &tstate);
+ struct ahd_devinfo devinfo;
+ unsigned int ppr_options = tinfo->goal.ppr_options
+ & ~MSG_EXT_PPR_RD_STRM;
+ unsigned int period = tinfo->goal.period;
+ unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
+ unsigned long flags;
+
+ if (rdstrm)
+ ppr_options |= MSG_EXT_PPR_RD_STRM;
+
+ ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
+ starget->channel + 'A', ROLE_INITIATOR);
+ ahd_find_syncrate(ahd, &period, &ppr_options,
+ dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
+ ahd_lock(ahd, &flags);
+ ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
+ ppr_options, AHD_TRANS_GOAL, FALSE);
+ ahd_unlock(ahd, &flags);
}
+static struct spi_function_template ahd_linux_transport_functions = {
+ .set_offset = ahd_linux_set_offset,
+ .show_offset = 1,
+ .set_period = ahd_linux_set_period,
+ .show_period = 1,
+ .set_width = ahd_linux_set_width,
+ .show_width = 1,
+ .set_dt = ahd_linux_set_dt,
+ .show_dt = 1,
+ .set_iu = ahd_linux_set_iu,
+ .show_iu = 1,
+ .set_qas = ahd_linux_set_qas,
+ .show_qas = 1,
+ .set_rd_strm = ahd_linux_set_rd_strm,
+ .show_rd_strm = 1,
+};
+
+
+
static int __init
ahd_linux_init(void)
{
- return ahd_linux_detect(&aic79xx_driver_template);
+ ahd_linux_transport_template = spi_attach_transport(&ahd_linux_transport_functions);
+ if (!ahd_linux_transport_template)
+ return -ENODEV;
+ scsi_transport_reserve_target(ahd_linux_transport_template,
+ sizeof(struct ahd_linux_target));
+ scsi_transport_reserve_device(ahd_linux_transport_template,
+ sizeof(struct ahd_linux_device));
+ if (ahd_linux_detect(&aic79xx_driver_template) > 0)
+ return 0;
+ spi_release_transport(ahd_linux_transport_template);
+ ahd_linux_exit();
+ return -ENODEV;
}
static void __exit
ahd_linux_exit(void)
{
- struct ahd_softc *ahd;
-
- /*
- * Shutdown DV threads before going into the SCSI mid-layer.
- * This avoids situations where the mid-layer locks the entire
- * kernel so that waiting for our DV threads to exit leads
- * to deadlock.
- */
- TAILQ_FOREACH(ahd, &ahd_tailq, links) {
-
- ahd_linux_kill_dv_thread(ahd);
- }
-
ahd_linux_pci_exit();
+ spi_release_transport(ahd_linux_transport_template);
}
module_init(ahd_linux_init);
projects / kernel.git / commitdiff