i915_switcheroo.o \
i915_sysfs.o \
i915_utils.o \
- intel_csr.o \
intel_device_info.o \
intel_memory_region.o \
intel_pch.o \
display/intel_color.o \
display/intel_combo_phy.o \
display/intel_connector.o \
+ display/intel_csr.o \
display/intel_display.o \
display/intel_display_power.o \
display/intel_dpio_phy.o \
--- /dev/null
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ */
+
+#include <linux/firmware.h>
+
+#include "i915_drv.h"
+#include "i915_reg.h"
+#include "intel_csr.h"
+
+/**
+ * DOC: csr support for dmc
+ *
+ * Display Context Save and Restore (CSR) firmware support added from gen9
+ * onwards to drive newly added DMC (Display microcontroller) in display
+ * engine to save and restore the state of display engine when it enter into
+ * low-power state and comes back to normal.
+ */
+
+#define GEN12_CSR_MAX_FW_SIZE ICL_CSR_MAX_FW_SIZE
+
+#define TGL_CSR_PATH "i915/tgl_dmc_ver2_04.bin"
+#define TGL_CSR_VERSION_REQUIRED CSR_VERSION(2, 4)
+#define TGL_CSR_MAX_FW_SIZE 0x6000
+MODULE_FIRMWARE(TGL_CSR_PATH);
+
+#define ICL_CSR_PATH "i915/icl_dmc_ver1_09.bin"
+#define ICL_CSR_VERSION_REQUIRED CSR_VERSION(1, 9)
+#define ICL_CSR_MAX_FW_SIZE 0x6000
+MODULE_FIRMWARE(ICL_CSR_PATH);
+
+#define CNL_CSR_PATH "i915/cnl_dmc_ver1_07.bin"
+#define CNL_CSR_VERSION_REQUIRED CSR_VERSION(1, 7)
+#define CNL_CSR_MAX_FW_SIZE GLK_CSR_MAX_FW_SIZE
+MODULE_FIRMWARE(CNL_CSR_PATH);
+
+#define GLK_CSR_PATH "i915/glk_dmc_ver1_04.bin"
+#define GLK_CSR_VERSION_REQUIRED CSR_VERSION(1, 4)
+#define GLK_CSR_MAX_FW_SIZE 0x4000
+MODULE_FIRMWARE(GLK_CSR_PATH);
+
+#define KBL_CSR_PATH "i915/kbl_dmc_ver1_04.bin"
+#define KBL_CSR_VERSION_REQUIRED CSR_VERSION(1, 4)
+#define KBL_CSR_MAX_FW_SIZE BXT_CSR_MAX_FW_SIZE
+MODULE_FIRMWARE(KBL_CSR_PATH);
+
+#define SKL_CSR_PATH "i915/skl_dmc_ver1_27.bin"
+#define SKL_CSR_VERSION_REQUIRED CSR_VERSION(1, 27)
+#define SKL_CSR_MAX_FW_SIZE BXT_CSR_MAX_FW_SIZE
+MODULE_FIRMWARE(SKL_CSR_PATH);
+
+#define BXT_CSR_PATH "i915/bxt_dmc_ver1_07.bin"
+#define BXT_CSR_VERSION_REQUIRED CSR_VERSION(1, 7)
+#define BXT_CSR_MAX_FW_SIZE 0x3000
+MODULE_FIRMWARE(BXT_CSR_PATH);
+
+#define CSR_DEFAULT_FW_OFFSET 0xFFFFFFFF
+#define PACKAGE_MAX_FW_INFO_ENTRIES 20
+#define PACKAGE_V2_MAX_FW_INFO_ENTRIES 32
+#define DMC_V1_MAX_MMIO_COUNT 8
+#define DMC_V3_MAX_MMIO_COUNT 20
+
+struct intel_css_header {
+ /* 0x09 for DMC */
+ u32 module_type;
+
+ /* Includes the DMC specific header in dwords */
+ u32 header_len;
+
+ /* always value would be 0x10000 */
+ u32 header_ver;
+
+ /* Not used */
+ u32 module_id;
+
+ /* Not used */
+ u32 module_vendor;
+
+ /* in YYYYMMDD format */
+ u32 date;
+
+ /* Size in dwords (CSS_Headerlen + PackageHeaderLen + dmc FWsLen)/4 */
+ u32 size;
+
+ /* Not used */
+ u32 key_size;
+
+ /* Not used */
+ u32 modulus_size;
+
+ /* Not used */
+ u32 exponent_size;
+
+ /* Not used */
+ u32 reserved1[12];
+
+ /* Major Minor */
+ u32 version;
+
+ /* Not used */
+ u32 reserved2[8];
+
+ /* Not used */
+ u32 kernel_header_info;
+} __packed;
+
+struct intel_fw_info {
+ u8 reserved1;
+
+ /* reserved on package_header version 1, must be 0 on version 2 */
+ u8 dmc_id;
+
+ /* Stepping (A, B, C, ..., *). * is a wildcard */
+ char stepping;
+
+ /* Sub-stepping (0, 1, ..., *). * is a wildcard */
+ char substepping;
+
+ u32 offset;
+ u32 reserved2;
+} __packed;
+
+struct intel_package_header {
+ /* DMC container header length in dwords */
+ u8 header_len;
+
+ /* 0x01, 0x02 */
+ u8 header_ver;
+
+ u8 reserved[10];
+
+ /* Number of valid entries in the FWInfo array below */
+ u32 num_entries;
+} __packed;
+
+struct intel_dmc_header_base {
+ /* always value would be 0x40403E3E */
+ u32 signature;
+
+ /* DMC binary header length */
+ u8 header_len;
+
+ /* 0x01 */
+ u8 header_ver;
+
+ /* Reserved */
+ u16 dmcc_ver;
+
+ /* Major, Minor */
+ u32 project;
+
+ /* Firmware program size (excluding header) in dwords */
+ u32 fw_size;
+
+ /* Major Minor version */
+ u32 fw_version;
+} __packed;
+
+struct intel_dmc_header_v1 {
+ struct intel_dmc_header_base base;
+
+ /* Number of valid MMIO cycles present. */
+ u32 mmio_count;
+
+ /* MMIO address */
+ u32 mmioaddr[DMC_V1_MAX_MMIO_COUNT];
+
+ /* MMIO data */
+ u32 mmiodata[DMC_V1_MAX_MMIO_COUNT];
+
+ /* FW filename */
+ char dfile[32];
+
+ u32 reserved1[2];
+} __packed;
+
+struct intel_dmc_header_v3 {
+ struct intel_dmc_header_base base;
+
+ /* DMC RAM start MMIO address */
+ u32 start_mmioaddr;
+
+ u32 reserved[9];
+
+ /* FW filename */
+ char dfile[32];
+
+ /* Number of valid MMIO cycles present. */
+ u32 mmio_count;
+
+ /* MMIO address */
+ u32 mmioaddr[DMC_V3_MAX_MMIO_COUNT];
+
+ /* MMIO data */
+ u32 mmiodata[DMC_V3_MAX_MMIO_COUNT];
+} __packed;
+
+struct stepping_info {
+ char stepping;
+ char substepping;
+};
+
+static const struct stepping_info skl_stepping_info[] = {
+ {'A', '0'}, {'B', '0'}, {'C', '0'},
+ {'D', '0'}, {'E', '0'}, {'F', '0'},
+ {'G', '0'}, {'H', '0'}, {'I', '0'},
+ {'J', '0'}, {'K', '0'}
+};
+
+static const struct stepping_info bxt_stepping_info[] = {
+ {'A', '0'}, {'A', '1'}, {'A', '2'},
+ {'B', '0'}, {'B', '1'}, {'B', '2'}
+};
+
+static const struct stepping_info icl_stepping_info[] = {
+ {'A', '0'}, {'A', '1'}, {'A', '2'},
+ {'B', '0'}, {'B', '2'},
+ {'C', '0'}
+};
+
+static const struct stepping_info no_stepping_info = { '*', '*' };
+
+static const struct stepping_info *
+intel_get_stepping_info(struct drm_i915_private *dev_priv)
+{
+ const struct stepping_info *si;
+ unsigned int size;
+
+ if (IS_ICELAKE(dev_priv)) {
+ size = ARRAY_SIZE(icl_stepping_info);
+ si = icl_stepping_info;
+ } else if (IS_SKYLAKE(dev_priv)) {
+ size = ARRAY_SIZE(skl_stepping_info);
+ si = skl_stepping_info;
+ } else if (IS_BROXTON(dev_priv)) {
+ size = ARRAY_SIZE(bxt_stepping_info);
+ si = bxt_stepping_info;
+ } else {
+ size = 0;
+ si = NULL;
+ }
+
+ if (INTEL_REVID(dev_priv) < size)
+ return si + INTEL_REVID(dev_priv);
+
+ return &no_stepping_info;
+}
+
+static void gen9_set_dc_state_debugmask(struct drm_i915_private *dev_priv)
+{
+ u32 val, mask;
+
+ mask = DC_STATE_DEBUG_MASK_MEMORY_UP;
+
+ if (IS_GEN9_LP(dev_priv))
+ mask |= DC_STATE_DEBUG_MASK_CORES;
+
+ /* The below bit doesn't need to be cleared ever afterwards */
+ val = I915_READ(DC_STATE_DEBUG);
+ if ((val & mask) != mask) {
+ val |= mask;
+ I915_WRITE(DC_STATE_DEBUG, val);
+ POSTING_READ(DC_STATE_DEBUG);
+ }
+}
+
+/**
+ * intel_csr_load_program() - write the firmware from memory to register.
+ * @dev_priv: i915 drm device.
+ *
+ * CSR firmware is read from a .bin file and kept in internal memory one time.
+ * Everytime display comes back from low power state this function is called to
+ * copy the firmware from internal memory to registers.
+ */
+void intel_csr_load_program(struct drm_i915_private *dev_priv)
+{
+ u32 *payload = dev_priv->csr.dmc_payload;
+ u32 i, fw_size;
+
+ if (!HAS_CSR(dev_priv)) {
+ drm_err(&dev_priv->drm,
+ "No CSR support available for this platform\n");
+ return;
+ }
+
+ if (!dev_priv->csr.dmc_payload) {
+ drm_err(&dev_priv->drm,
+ "Tried to program CSR with empty payload\n");
+ return;
+ }
+
+ fw_size = dev_priv->csr.dmc_fw_size;
+ assert_rpm_wakelock_held(&dev_priv->runtime_pm);
+
+ preempt_disable();
+
+ for (i = 0; i < fw_size; i++)
+ intel_uncore_write_fw(&dev_priv->uncore, CSR_PROGRAM(i),
+ payload[i]);
+
+ preempt_enable();
+
+ for (i = 0; i < dev_priv->csr.mmio_count; i++) {
+ I915_WRITE(dev_priv->csr.mmioaddr[i],
+ dev_priv->csr.mmiodata[i]);
+ }
+
+ dev_priv->csr.dc_state = 0;
+
+ gen9_set_dc_state_debugmask(dev_priv);
+}
+
+/*
+ * Search fw_info table for dmc_offset to find firmware binary: num_entries is
+ * already sanitized.
+ */
+static u32 find_dmc_fw_offset(const struct intel_fw_info *fw_info,
+ unsigned int num_entries,
+ const struct stepping_info *si,
+ u8 package_ver)
+{
+ u32 dmc_offset = CSR_DEFAULT_FW_OFFSET;
+ unsigned int i;
+
+ for (i = 0; i < num_entries; i++) {
+ if (package_ver > 1 && fw_info[i].dmc_id != 0)
+ continue;
+
+ if (fw_info[i].substepping == '*' &&
+ si->stepping == fw_info[i].stepping) {
+ dmc_offset = fw_info[i].offset;
+ break;
+ }
+
+ if (si->stepping == fw_info[i].stepping &&
+ si->substepping == fw_info[i].substepping) {
+ dmc_offset = fw_info[i].offset;
+ break;
+ }
+
+ if (fw_info[i].stepping == '*' &&
+ fw_info[i].substepping == '*') {
+ /*
+ * In theory we should stop the search as generic
+ * entries should always come after the more specific
+ * ones, but let's continue to make sure to work even
+ * with "broken" firmwares. If we don't find a more
+ * specific one, then we use this entry
+ */
+ dmc_offset = fw_info[i].offset;
+ }
+ }
+
+ return dmc_offset;
+}
+
+static u32 parse_csr_fw_dmc(struct intel_csr *csr,
+ const struct intel_dmc_header_base *dmc_header,
+ size_t rem_size)
+{
+ unsigned int header_len_bytes, dmc_header_size, payload_size, i;
+ const u32 *mmioaddr, *mmiodata;
+ u32 mmio_count, mmio_count_max;
+ u8 *payload;
+
+ BUILD_BUG_ON(ARRAY_SIZE(csr->mmioaddr) < DMC_V3_MAX_MMIO_COUNT ||
+ ARRAY_SIZE(csr->mmioaddr) < DMC_V1_MAX_MMIO_COUNT);
+
+ /*
+ * Check if we can access common fields, we will checkc again below
+ * after we have read the version
+ */
+ if (rem_size < sizeof(struct intel_dmc_header_base))
+ goto error_truncated;
+
+ /* Cope with small differences between v1 and v3 */
+ if (dmc_header->header_ver == 3) {
+ const struct intel_dmc_header_v3 *v3 =
+ (const struct intel_dmc_header_v3 *)dmc_header;
+
+ if (rem_size < sizeof(struct intel_dmc_header_v3))
+ goto error_truncated;
+
+ mmioaddr = v3->mmioaddr;
+ mmiodata = v3->mmiodata;
+ mmio_count = v3->mmio_count;
+ mmio_count_max = DMC_V3_MAX_MMIO_COUNT;
+ /* header_len is in dwords */
+ header_len_bytes = dmc_header->header_len * 4;
+ dmc_header_size = sizeof(*v3);
+ } else if (dmc_header->header_ver == 1) {
+ const struct intel_dmc_header_v1 *v1 =
+ (const struct intel_dmc_header_v1 *)dmc_header;
+
+ if (rem_size < sizeof(struct intel_dmc_header_v1))
+ goto error_truncated;
+
+ mmioaddr = v1->mmioaddr;
+ mmiodata = v1->mmiodata;
+ mmio_count = v1->mmio_count;
+ mmio_count_max = DMC_V1_MAX_MMIO_COUNT;
+ header_len_bytes = dmc_header->header_len;
+ dmc_header_size = sizeof(*v1);
+ } else {
+ DRM_ERROR("Unknown DMC fw header version: %u\n",
+ dmc_header->header_ver);
+ return 0;
+ }
+
+ if (header_len_bytes != dmc_header_size) {
+ DRM_ERROR("DMC firmware has wrong dmc header length "
+ "(%u bytes)\n", header_len_bytes);
+ return 0;
+ }
+
+ /* Cache the dmc header info. */
+ if (mmio_count > mmio_count_max) {
+ DRM_ERROR("DMC firmware has wrong mmio count %u\n", mmio_count);
+ return 0;
+ }
+
+ for (i = 0; i < mmio_count; i++) {
+ if (mmioaddr[i] < CSR_MMIO_START_RANGE ||
+ mmioaddr[i] > CSR_MMIO_END_RANGE) {
+ DRM_ERROR("DMC firmware has wrong mmio address 0x%x\n",
+ mmioaddr[i]);
+ return 0;
+ }
+ csr->mmioaddr[i] = _MMIO(mmioaddr[i]);
+ csr->mmiodata[i] = mmiodata[i];
+ }
+ csr->mmio_count = mmio_count;
+
+ rem_size -= header_len_bytes;
+
+ /* fw_size is in dwords, so multiplied by 4 to convert into bytes. */
+ payload_size = dmc_header->fw_size * 4;
+ if (rem_size < payload_size)
+ goto error_truncated;
+
+ if (payload_size > csr->max_fw_size) {
+ DRM_ERROR("DMC FW too big (%u bytes)\n", payload_size);
+ return 0;
+ }
+ csr->dmc_fw_size = dmc_header->fw_size;
+
+ csr->dmc_payload = kmalloc(payload_size, GFP_KERNEL);
+ if (!csr->dmc_payload) {
+ DRM_ERROR("Memory allocation failed for dmc payload\n");
+ return 0;
+ }
+
+ payload = (u8 *)(dmc_header) + header_len_bytes;
+ memcpy(csr->dmc_payload, payload, payload_size);
+
+ return header_len_bytes + payload_size;
+
+error_truncated:
+ DRM_ERROR("Truncated DMC firmware, refusing.\n");
+ return 0;
+}
+
+static u32
+parse_csr_fw_package(struct intel_csr *csr,
+ const struct intel_package_header *package_header,
+ const struct stepping_info *si,
+ size_t rem_size)
+{
+ u32 package_size = sizeof(struct intel_package_header);
+ u32 num_entries, max_entries, dmc_offset;
+ const struct intel_fw_info *fw_info;
+
+ if (rem_size < package_size)
+ goto error_truncated;
+
+ if (package_header->header_ver == 1) {
+ max_entries = PACKAGE_MAX_FW_INFO_ENTRIES;
+ } else if (package_header->header_ver == 2) {
+ max_entries = PACKAGE_V2_MAX_FW_INFO_ENTRIES;
+ } else {
+ DRM_ERROR("DMC firmware has unknown header version %u\n",
+ package_header->header_ver);
+ return 0;
+ }
+
+ /*
+ * We should always have space for max_entries,
+ * even if not all are used
+ */
+ package_size += max_entries * sizeof(struct intel_fw_info);
+ if (rem_size < package_size)
+ goto error_truncated;
+
+ if (package_header->header_len * 4 != package_size) {
+ DRM_ERROR("DMC firmware has wrong package header length "
+ "(%u bytes)\n", package_size);
+ return 0;
+ }
+
+ num_entries = package_header->num_entries;
+ if (WARN_ON(package_header->num_entries > max_entries))
+ num_entries = max_entries;
+
+ fw_info = (const struct intel_fw_info *)
+ ((u8 *)package_header + sizeof(*package_header));
+ dmc_offset = find_dmc_fw_offset(fw_info, num_entries, si,
+ package_header->header_ver);
+ if (dmc_offset == CSR_DEFAULT_FW_OFFSET) {
+ DRM_ERROR("DMC firmware not supported for %c stepping\n",
+ si->stepping);
+ return 0;
+ }
+
+ /* dmc_offset is in dwords */
+ return package_size + dmc_offset * 4;
+
+error_truncated:
+ DRM_ERROR("Truncated DMC firmware, refusing.\n");
+ return 0;
+}
+
+/* Return number of bytes parsed or 0 on error */
+static u32 parse_csr_fw_css(struct intel_csr *csr,
+ struct intel_css_header *css_header,
+ size_t rem_size)
+{
+ if (rem_size < sizeof(struct intel_css_header)) {
+ DRM_ERROR("Truncated DMC firmware, refusing.\n");
+ return 0;
+ }
+
+ if (sizeof(struct intel_css_header) !=
+ (css_header->header_len * 4)) {
+ DRM_ERROR("DMC firmware has wrong CSS header length "
+ "(%u bytes)\n",
+ (css_header->header_len * 4));
+ return 0;
+ }
+
+ if (csr->required_version &&
+ css_header->version != csr->required_version) {
+ DRM_INFO("Refusing to load DMC firmware v%u.%u,"
+ " please use v%u.%u\n",
+ CSR_VERSION_MAJOR(css_header->version),
+ CSR_VERSION_MINOR(css_header->version),
+ CSR_VERSION_MAJOR(csr->required_version),
+ CSR_VERSION_MINOR(csr->required_version));
+ return 0;
+ }
+
+ csr->version = css_header->version;
+
+ return sizeof(struct intel_css_header);
+}
+
+static void parse_csr_fw(struct drm_i915_private *dev_priv,
+ const struct firmware *fw)
+{
+ struct intel_css_header *css_header;
+ struct intel_package_header *package_header;
+ struct intel_dmc_header_base *dmc_header;
+ struct intel_csr *csr = &dev_priv->csr;
+ const struct stepping_info *si = intel_get_stepping_info(dev_priv);
+ u32 readcount = 0;
+ u32 r;
+
+ if (!fw)
+ return;
+
+ /* Extract CSS Header information */
+ css_header = (struct intel_css_header *)fw->data;
+ r = parse_csr_fw_css(csr, css_header, fw->size);
+ if (!r)
+ return;
+
+ readcount += r;
+
+ /* Extract Package Header information */
+ package_header = (struct intel_package_header *)&fw->data[readcount];
+ r = parse_csr_fw_package(csr, package_header, si, fw->size - readcount);
+ if (!r)
+ return;
+
+ readcount += r;
+
+ /* Extract dmc_header information */
+ dmc_header = (struct intel_dmc_header_base *)&fw->data[readcount];
+ parse_csr_fw_dmc(csr, dmc_header, fw->size - readcount);
+}
+
+static void intel_csr_runtime_pm_get(struct drm_i915_private *dev_priv)
+{
+ drm_WARN_ON(&dev_priv->drm, dev_priv->csr.wakeref);
+ dev_priv->csr.wakeref =
+ intel_display_power_get(dev_priv, POWER_DOMAIN_INIT);
+}
+
+static void intel_csr_runtime_pm_put(struct drm_i915_private *dev_priv)
+{
+ intel_wakeref_t wakeref __maybe_unused =
+ fetch_and_zero(&dev_priv->csr.wakeref);
+
+ intel_display_power_put(dev_priv, POWER_DOMAIN_INIT, wakeref);
+}
+
+static void csr_load_work_fn(struct work_struct *work)
+{
+ struct drm_i915_private *dev_priv;
+ struct intel_csr *csr;
+ const struct firmware *fw = NULL;
+
+ dev_priv = container_of(work, typeof(*dev_priv), csr.work);
+ csr = &dev_priv->csr;
+
+ request_firmware(&fw, dev_priv->csr.fw_path, &dev_priv->drm.pdev->dev);
+ parse_csr_fw(dev_priv, fw);
+
+ if (dev_priv->csr.dmc_payload) {
+ intel_csr_load_program(dev_priv);
+ intel_csr_runtime_pm_put(dev_priv);
+
+ drm_info(&dev_priv->drm,
+ "Finished loading DMC firmware %s (v%u.%u)\n",
+ dev_priv->csr.fw_path, CSR_VERSION_MAJOR(csr->version),
+ CSR_VERSION_MINOR(csr->version));
+ } else {
+ drm_notice(&dev_priv->drm,
+ "Failed to load DMC firmware %s."
+ " Disabling runtime power management.\n",
+ csr->fw_path);
+ drm_notice(&dev_priv->drm, "DMC firmware homepage: %s",
+ INTEL_UC_FIRMWARE_URL);
+ }
+
+ release_firmware(fw);
+}
+
+/**
+ * intel_csr_ucode_init() - initialize the firmware loading.
+ * @dev_priv: i915 drm device.
+ *
+ * This function is called at the time of loading the display driver to read
+ * firmware from a .bin file and copied into a internal memory.
+ */
+void intel_csr_ucode_init(struct drm_i915_private *dev_priv)
+{
+ struct intel_csr *csr = &dev_priv->csr;
+
+ INIT_WORK(&dev_priv->csr.work, csr_load_work_fn);
+
+ if (!HAS_CSR(dev_priv))
+ return;
+
+ /*
+ * Obtain a runtime pm reference, until CSR is loaded, to avoid entering
+ * runtime-suspend.
+ *
+ * On error, we return with the rpm wakeref held to prevent runtime
+ * suspend as runtime suspend *requires* a working CSR for whatever
+ * reason.
+ */
+ intel_csr_runtime_pm_get(dev_priv);
+
+ if (INTEL_GEN(dev_priv) >= 12) {
+ csr->fw_path = TGL_CSR_PATH;
+ csr->required_version = TGL_CSR_VERSION_REQUIRED;
+ /* Allow to load fw via parameter using the last known size */
+ csr->max_fw_size = GEN12_CSR_MAX_FW_SIZE;
+ } else if (IS_GEN(dev_priv, 11)) {
+ csr->fw_path = ICL_CSR_PATH;
+ csr->required_version = ICL_CSR_VERSION_REQUIRED;
+ csr->max_fw_size = ICL_CSR_MAX_FW_SIZE;
+ } else if (IS_CANNONLAKE(dev_priv)) {
+ csr->fw_path = CNL_CSR_PATH;
+ csr->required_version = CNL_CSR_VERSION_REQUIRED;
+ csr->max_fw_size = CNL_CSR_MAX_FW_SIZE;
+ } else if (IS_GEMINILAKE(dev_priv)) {
+ csr->fw_path = GLK_CSR_PATH;
+ csr->required_version = GLK_CSR_VERSION_REQUIRED;
+ csr->max_fw_size = GLK_CSR_MAX_FW_SIZE;
+ } else if (IS_KABYLAKE(dev_priv) || IS_COFFEELAKE(dev_priv)) {
+ csr->fw_path = KBL_CSR_PATH;
+ csr->required_version = KBL_CSR_VERSION_REQUIRED;
+ csr->max_fw_size = KBL_CSR_MAX_FW_SIZE;
+ } else if (IS_SKYLAKE(dev_priv)) {
+ csr->fw_path = SKL_CSR_PATH;
+ csr->required_version = SKL_CSR_VERSION_REQUIRED;
+ csr->max_fw_size = SKL_CSR_MAX_FW_SIZE;
+ } else if (IS_BROXTON(dev_priv)) {
+ csr->fw_path = BXT_CSR_PATH;
+ csr->required_version = BXT_CSR_VERSION_REQUIRED;
+ csr->max_fw_size = BXT_CSR_MAX_FW_SIZE;
+ }
+
+ if (i915_modparams.dmc_firmware_path) {
+ if (strlen(i915_modparams.dmc_firmware_path) == 0) {
+ csr->fw_path = NULL;
+ drm_info(&dev_priv->drm,
+ "Disabling CSR firmware and runtime PM\n");
+ return;
+ }
+
+ csr->fw_path = i915_modparams.dmc_firmware_path;
+ /* Bypass version check for firmware override. */
+ csr->required_version = 0;
+ }
+
+ if (csr->fw_path == NULL) {
+ drm_dbg_kms(&dev_priv->drm,
+ "No known CSR firmware for platform, disabling runtime PM\n");
+ return;
+ }
+
+ drm_dbg_kms(&dev_priv->drm, "Loading %s\n", csr->fw_path);
+ schedule_work(&dev_priv->csr.work);
+}
+
+/**
+ * intel_csr_ucode_suspend() - prepare CSR firmware before system suspend
+ * @dev_priv: i915 drm device
+ *
+ * Prepare the DMC firmware before entering system suspend. This includes
+ * flushing pending work items and releasing any resources acquired during
+ * init.
+ */
+void intel_csr_ucode_suspend(struct drm_i915_private *dev_priv)
+{
+ if (!HAS_CSR(dev_priv))
+ return;
+
+ flush_work(&dev_priv->csr.work);
+
+ /* Drop the reference held in case DMC isn't loaded. */
+ if (!dev_priv->csr.dmc_payload)
+ intel_csr_runtime_pm_put(dev_priv);
+}
+
+/**
+ * intel_csr_ucode_resume() - init CSR firmware during system resume
+ * @dev_priv: i915 drm device
+ *
+ * Reinitialize the DMC firmware during system resume, reacquiring any
+ * resources released in intel_csr_ucode_suspend().
+ */
+void intel_csr_ucode_resume(struct drm_i915_private *dev_priv)
+{
+ if (!HAS_CSR(dev_priv))
+ return;
+
+ /*
+ * Reacquire the reference to keep RPM disabled in case DMC isn't
+ * loaded.
+ */
+ if (!dev_priv->csr.dmc_payload)
+ intel_csr_runtime_pm_get(dev_priv);
+}
+
+/**
+ * intel_csr_ucode_fini() - unload the CSR firmware.
+ * @dev_priv: i915 drm device.
+ *
+ * Firmmware unloading includes freeing the internal memory and reset the
+ * firmware loading status.
+ */
+void intel_csr_ucode_fini(struct drm_i915_private *dev_priv)
+{
+ if (!HAS_CSR(dev_priv))
+ return;
+
+ intel_csr_ucode_suspend(dev_priv);
+ drm_WARN_ON(&dev_priv->drm, dev_priv->csr.wakeref);
+
+ kfree(dev_priv->csr.dmc_payload);
+}
--- /dev/null
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#ifndef __INTEL_CSR_H__
+#define __INTEL_CSR_H__
+
+struct drm_i915_private;
+
+#define CSR_VERSION(major, minor) ((major) << 16 | (minor))
+#define CSR_VERSION_MAJOR(version) ((version) >> 16)
+#define CSR_VERSION_MINOR(version) ((version) & 0xffff)
+
+void intel_csr_ucode_init(struct drm_i915_private *i915);
+void intel_csr_load_program(struct drm_i915_private *i915);
+void intel_csr_ucode_fini(struct drm_i915_private *i915);
+void intel_csr_ucode_suspend(struct drm_i915_private *i915);
+void intel_csr_ucode_resume(struct drm_i915_private *i915);
+
+#endif /* __INTEL_CSR_H__ */
#include <drm/drm_debugfs.h>
#include <drm/drm_fourcc.h>
+#include "display/intel_csr.h"
#include "display/intel_display_types.h"
#include "display/intel_dp.h"
#include "display/intel_fbc.h"
#include "i915_debugfs_params.h"
#include "i915_irq.h"
#include "i915_trace.h"
-#include "intel_csr.h"
#include "intel_pm.h"
#include "intel_sideband.h"
#include "display/intel_audio.h"
#include "display/intel_bw.h"
#include "display/intel_cdclk.h"
+#include "display/intel_csr.h"
#include "display/intel_display_types.h"
#include "display/intel_dp.h"
#include "display/intel_fbdev.h"
#include "i915_sysfs.h"
#include "i915_trace.h"
#include "i915_vgpu.h"
-#include "intel_csr.h"
#include "intel_memory_region.h"
#include "intel_pm.h"
#include <drm/drm_print.h>
#include "display/intel_atomic.h"
+#include "display/intel_csr.h"
#include "display/intel_overlay.h"
#include "gem/i915_gem_context.h"
#include "i915_gpu_error.h"
#include "i915_memcpy.h"
#include "i915_scatterlist.h"
-#include "intel_csr.h"
#define ALLOW_FAIL (GFP_KERNEL | __GFP_RETRY_MAYFAIL | __GFP_NOWARN)
#define ATOMIC_MAYFAIL (GFP_ATOMIC | __GFP_NOWARN)
+++ /dev/null
-/*
- * Copyright © 2014 Intel Corporation
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice (including the next
- * paragraph) shall be included in all copies or substantial portions of the
- * Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
- * IN THE SOFTWARE.
- *
- */
-
-#include <linux/firmware.h>
-
-#include "i915_drv.h"
-#include "i915_reg.h"
-#include "intel_csr.h"
-
-/**
- * DOC: csr support for dmc
- *
- * Display Context Save and Restore (CSR) firmware support added from gen9
- * onwards to drive newly added DMC (Display microcontroller) in display
- * engine to save and restore the state of display engine when it enter into
- * low-power state and comes back to normal.
- */
-
-#define GEN12_CSR_MAX_FW_SIZE ICL_CSR_MAX_FW_SIZE
-
-#define TGL_CSR_PATH "i915/tgl_dmc_ver2_04.bin"
-#define TGL_CSR_VERSION_REQUIRED CSR_VERSION(2, 4)
-#define TGL_CSR_MAX_FW_SIZE 0x6000
-MODULE_FIRMWARE(TGL_CSR_PATH);
-
-#define ICL_CSR_PATH "i915/icl_dmc_ver1_09.bin"
-#define ICL_CSR_VERSION_REQUIRED CSR_VERSION(1, 9)
-#define ICL_CSR_MAX_FW_SIZE 0x6000
-MODULE_FIRMWARE(ICL_CSR_PATH);
-
-#define CNL_CSR_PATH "i915/cnl_dmc_ver1_07.bin"
-#define CNL_CSR_VERSION_REQUIRED CSR_VERSION(1, 7)
-#define CNL_CSR_MAX_FW_SIZE GLK_CSR_MAX_FW_SIZE
-MODULE_FIRMWARE(CNL_CSR_PATH);
-
-#define GLK_CSR_PATH "i915/glk_dmc_ver1_04.bin"
-#define GLK_CSR_VERSION_REQUIRED CSR_VERSION(1, 4)
-#define GLK_CSR_MAX_FW_SIZE 0x4000
-MODULE_FIRMWARE(GLK_CSR_PATH);
-
-#define KBL_CSR_PATH "i915/kbl_dmc_ver1_04.bin"
-#define KBL_CSR_VERSION_REQUIRED CSR_VERSION(1, 4)
-#define KBL_CSR_MAX_FW_SIZE BXT_CSR_MAX_FW_SIZE
-MODULE_FIRMWARE(KBL_CSR_PATH);
-
-#define SKL_CSR_PATH "i915/skl_dmc_ver1_27.bin"
-#define SKL_CSR_VERSION_REQUIRED CSR_VERSION(1, 27)
-#define SKL_CSR_MAX_FW_SIZE BXT_CSR_MAX_FW_SIZE
-MODULE_FIRMWARE(SKL_CSR_PATH);
-
-#define BXT_CSR_PATH "i915/bxt_dmc_ver1_07.bin"
-#define BXT_CSR_VERSION_REQUIRED CSR_VERSION(1, 7)
-#define BXT_CSR_MAX_FW_SIZE 0x3000
-MODULE_FIRMWARE(BXT_CSR_PATH);
-
-#define CSR_DEFAULT_FW_OFFSET 0xFFFFFFFF
-#define PACKAGE_MAX_FW_INFO_ENTRIES 20
-#define PACKAGE_V2_MAX_FW_INFO_ENTRIES 32
-#define DMC_V1_MAX_MMIO_COUNT 8
-#define DMC_V3_MAX_MMIO_COUNT 20
-
-struct intel_css_header {
- /* 0x09 for DMC */
- u32 module_type;
-
- /* Includes the DMC specific header in dwords */
- u32 header_len;
-
- /* always value would be 0x10000 */
- u32 header_ver;
-
- /* Not used */
- u32 module_id;
-
- /* Not used */
- u32 module_vendor;
-
- /* in YYYYMMDD format */
- u32 date;
-
- /* Size in dwords (CSS_Headerlen + PackageHeaderLen + dmc FWsLen)/4 */
- u32 size;
-
- /* Not used */
- u32 key_size;
-
- /* Not used */
- u32 modulus_size;
-
- /* Not used */
- u32 exponent_size;
-
- /* Not used */
- u32 reserved1[12];
-
- /* Major Minor */
- u32 version;
-
- /* Not used */
- u32 reserved2[8];
-
- /* Not used */
- u32 kernel_header_info;
-} __packed;
-
-struct intel_fw_info {
- u8 reserved1;
-
- /* reserved on package_header version 1, must be 0 on version 2 */
- u8 dmc_id;
-
- /* Stepping (A, B, C, ..., *). * is a wildcard */
- char stepping;
-
- /* Sub-stepping (0, 1, ..., *). * is a wildcard */
- char substepping;
-
- u32 offset;
- u32 reserved2;
-} __packed;
-
-struct intel_package_header {
- /* DMC container header length in dwords */
- u8 header_len;
-
- /* 0x01, 0x02 */
- u8 header_ver;
-
- u8 reserved[10];
-
- /* Number of valid entries in the FWInfo array below */
- u32 num_entries;
-} __packed;
-
-struct intel_dmc_header_base {
- /* always value would be 0x40403E3E */
- u32 signature;
-
- /* DMC binary header length */
- u8 header_len;
-
- /* 0x01 */
- u8 header_ver;
-
- /* Reserved */
- u16 dmcc_ver;
-
- /* Major, Minor */
- u32 project;
-
- /* Firmware program size (excluding header) in dwords */
- u32 fw_size;
-
- /* Major Minor version */
- u32 fw_version;
-} __packed;
-
-struct intel_dmc_header_v1 {
- struct intel_dmc_header_base base;
-
- /* Number of valid MMIO cycles present. */
- u32 mmio_count;
-
- /* MMIO address */
- u32 mmioaddr[DMC_V1_MAX_MMIO_COUNT];
-
- /* MMIO data */
- u32 mmiodata[DMC_V1_MAX_MMIO_COUNT];
-
- /* FW filename */
- char dfile[32];
-
- u32 reserved1[2];
-} __packed;
-
-struct intel_dmc_header_v3 {
- struct intel_dmc_header_base base;
-
- /* DMC RAM start MMIO address */
- u32 start_mmioaddr;
-
- u32 reserved[9];
-
- /* FW filename */
- char dfile[32];
-
- /* Number of valid MMIO cycles present. */
- u32 mmio_count;
-
- /* MMIO address */
- u32 mmioaddr[DMC_V3_MAX_MMIO_COUNT];
-
- /* MMIO data */
- u32 mmiodata[DMC_V3_MAX_MMIO_COUNT];
-} __packed;
-
-struct stepping_info {
- char stepping;
- char substepping;
-};
-
-static const struct stepping_info skl_stepping_info[] = {
- {'A', '0'}, {'B', '0'}, {'C', '0'},
- {'D', '0'}, {'E', '0'}, {'F', '0'},
- {'G', '0'}, {'H', '0'}, {'I', '0'},
- {'J', '0'}, {'K', '0'}
-};
-
-static const struct stepping_info bxt_stepping_info[] = {
- {'A', '0'}, {'A', '1'}, {'A', '2'},
- {'B', '0'}, {'B', '1'}, {'B', '2'}
-};
-
-static const struct stepping_info icl_stepping_info[] = {
- {'A', '0'}, {'A', '1'}, {'A', '2'},
- {'B', '0'}, {'B', '2'},
- {'C', '0'}
-};
-
-static const struct stepping_info no_stepping_info = { '*', '*' };
-
-static const struct stepping_info *
-intel_get_stepping_info(struct drm_i915_private *dev_priv)
-{
- const struct stepping_info *si;
- unsigned int size;
-
- if (IS_ICELAKE(dev_priv)) {
- size = ARRAY_SIZE(icl_stepping_info);
- si = icl_stepping_info;
- } else if (IS_SKYLAKE(dev_priv)) {
- size = ARRAY_SIZE(skl_stepping_info);
- si = skl_stepping_info;
- } else if (IS_BROXTON(dev_priv)) {
- size = ARRAY_SIZE(bxt_stepping_info);
- si = bxt_stepping_info;
- } else {
- size = 0;
- si = NULL;
- }
-
- if (INTEL_REVID(dev_priv) < size)
- return si + INTEL_REVID(dev_priv);
-
- return &no_stepping_info;
-}
-
-static void gen9_set_dc_state_debugmask(struct drm_i915_private *dev_priv)
-{
- u32 val, mask;
-
- mask = DC_STATE_DEBUG_MASK_MEMORY_UP;
-
- if (IS_GEN9_LP(dev_priv))
- mask |= DC_STATE_DEBUG_MASK_CORES;
-
- /* The below bit doesn't need to be cleared ever afterwards */
- val = I915_READ(DC_STATE_DEBUG);
- if ((val & mask) != mask) {
- val |= mask;
- I915_WRITE(DC_STATE_DEBUG, val);
- POSTING_READ(DC_STATE_DEBUG);
- }
-}
-
-/**
- * intel_csr_load_program() - write the firmware from memory to register.
- * @dev_priv: i915 drm device.
- *
- * CSR firmware is read from a .bin file and kept in internal memory one time.
- * Everytime display comes back from low power state this function is called to
- * copy the firmware from internal memory to registers.
- */
-void intel_csr_load_program(struct drm_i915_private *dev_priv)
-{
- u32 *payload = dev_priv->csr.dmc_payload;
- u32 i, fw_size;
-
- if (!HAS_CSR(dev_priv)) {
- drm_err(&dev_priv->drm,
- "No CSR support available for this platform\n");
- return;
- }
-
- if (!dev_priv->csr.dmc_payload) {
- drm_err(&dev_priv->drm,
- "Tried to program CSR with empty payload\n");
- return;
- }
-
- fw_size = dev_priv->csr.dmc_fw_size;
- assert_rpm_wakelock_held(&dev_priv->runtime_pm);
-
- preempt_disable();
-
- for (i = 0; i < fw_size; i++)
- intel_uncore_write_fw(&dev_priv->uncore, CSR_PROGRAM(i),
- payload[i]);
-
- preempt_enable();
-
- for (i = 0; i < dev_priv->csr.mmio_count; i++) {
- I915_WRITE(dev_priv->csr.mmioaddr[i],
- dev_priv->csr.mmiodata[i]);
- }
-
- dev_priv->csr.dc_state = 0;
-
- gen9_set_dc_state_debugmask(dev_priv);
-}
-
-/*
- * Search fw_info table for dmc_offset to find firmware binary: num_entries is
- * already sanitized.
- */
-static u32 find_dmc_fw_offset(const struct intel_fw_info *fw_info,
- unsigned int num_entries,
- const struct stepping_info *si,
- u8 package_ver)
-{
- u32 dmc_offset = CSR_DEFAULT_FW_OFFSET;
- unsigned int i;
-
- for (i = 0; i < num_entries; i++) {
- if (package_ver > 1 && fw_info[i].dmc_id != 0)
- continue;
-
- if (fw_info[i].substepping == '*' &&
- si->stepping == fw_info[i].stepping) {
- dmc_offset = fw_info[i].offset;
- break;
- }
-
- if (si->stepping == fw_info[i].stepping &&
- si->substepping == fw_info[i].substepping) {
- dmc_offset = fw_info[i].offset;
- break;
- }
-
- if (fw_info[i].stepping == '*' &&
- fw_info[i].substepping == '*') {
- /*
- * In theory we should stop the search as generic
- * entries should always come after the more specific
- * ones, but let's continue to make sure to work even
- * with "broken" firmwares. If we don't find a more
- * specific one, then we use this entry
- */
- dmc_offset = fw_info[i].offset;
- }
- }
-
- return dmc_offset;
-}
-
-static u32 parse_csr_fw_dmc(struct intel_csr *csr,
- const struct intel_dmc_header_base *dmc_header,
- size_t rem_size)
-{
- unsigned int header_len_bytes, dmc_header_size, payload_size, i;
- const u32 *mmioaddr, *mmiodata;
- u32 mmio_count, mmio_count_max;
- u8 *payload;
-
- BUILD_BUG_ON(ARRAY_SIZE(csr->mmioaddr) < DMC_V3_MAX_MMIO_COUNT ||
- ARRAY_SIZE(csr->mmioaddr) < DMC_V1_MAX_MMIO_COUNT);
-
- /*
- * Check if we can access common fields, we will checkc again below
- * after we have read the version
- */
- if (rem_size < sizeof(struct intel_dmc_header_base))
- goto error_truncated;
-
- /* Cope with small differences between v1 and v3 */
- if (dmc_header->header_ver == 3) {
- const struct intel_dmc_header_v3 *v3 =
- (const struct intel_dmc_header_v3 *)dmc_header;
-
- if (rem_size < sizeof(struct intel_dmc_header_v3))
- goto error_truncated;
-
- mmioaddr = v3->mmioaddr;
- mmiodata = v3->mmiodata;
- mmio_count = v3->mmio_count;
- mmio_count_max = DMC_V3_MAX_MMIO_COUNT;
- /* header_len is in dwords */
- header_len_bytes = dmc_header->header_len * 4;
- dmc_header_size = sizeof(*v3);
- } else if (dmc_header->header_ver == 1) {
- const struct intel_dmc_header_v1 *v1 =
- (const struct intel_dmc_header_v1 *)dmc_header;
-
- if (rem_size < sizeof(struct intel_dmc_header_v1))
- goto error_truncated;
-
- mmioaddr = v1->mmioaddr;
- mmiodata = v1->mmiodata;
- mmio_count = v1->mmio_count;
- mmio_count_max = DMC_V1_MAX_MMIO_COUNT;
- header_len_bytes = dmc_header->header_len;
- dmc_header_size = sizeof(*v1);
- } else {
- DRM_ERROR("Unknown DMC fw header version: %u\n",
- dmc_header->header_ver);
- return 0;
- }
-
- if (header_len_bytes != dmc_header_size) {
- DRM_ERROR("DMC firmware has wrong dmc header length "
- "(%u bytes)\n", header_len_bytes);
- return 0;
- }
-
- /* Cache the dmc header info. */
- if (mmio_count > mmio_count_max) {
- DRM_ERROR("DMC firmware has wrong mmio count %u\n", mmio_count);
- return 0;
- }
-
- for (i = 0; i < mmio_count; i++) {
- if (mmioaddr[i] < CSR_MMIO_START_RANGE ||
- mmioaddr[i] > CSR_MMIO_END_RANGE) {
- DRM_ERROR("DMC firmware has wrong mmio address 0x%x\n",
- mmioaddr[i]);
- return 0;
- }
- csr->mmioaddr[i] = _MMIO(mmioaddr[i]);
- csr->mmiodata[i] = mmiodata[i];
- }
- csr->mmio_count = mmio_count;
-
- rem_size -= header_len_bytes;
-
- /* fw_size is in dwords, so multiplied by 4 to convert into bytes. */
- payload_size = dmc_header->fw_size * 4;
- if (rem_size < payload_size)
- goto error_truncated;
-
- if (payload_size > csr->max_fw_size) {
- DRM_ERROR("DMC FW too big (%u bytes)\n", payload_size);
- return 0;
- }
- csr->dmc_fw_size = dmc_header->fw_size;
-
- csr->dmc_payload = kmalloc(payload_size, GFP_KERNEL);
- if (!csr->dmc_payload) {
- DRM_ERROR("Memory allocation failed for dmc payload\n");
- return 0;
- }
-
- payload = (u8 *)(dmc_header) + header_len_bytes;
- memcpy(csr->dmc_payload, payload, payload_size);
-
- return header_len_bytes + payload_size;
-
-error_truncated:
- DRM_ERROR("Truncated DMC firmware, refusing.\n");
- return 0;
-}
-
-static u32
-parse_csr_fw_package(struct intel_csr *csr,
- const struct intel_package_header *package_header,
- const struct stepping_info *si,
- size_t rem_size)
-{
- u32 package_size = sizeof(struct intel_package_header);
- u32 num_entries, max_entries, dmc_offset;
- const struct intel_fw_info *fw_info;
-
- if (rem_size < package_size)
- goto error_truncated;
-
- if (package_header->header_ver == 1) {
- max_entries = PACKAGE_MAX_FW_INFO_ENTRIES;
- } else if (package_header->header_ver == 2) {
- max_entries = PACKAGE_V2_MAX_FW_INFO_ENTRIES;
- } else {
- DRM_ERROR("DMC firmware has unknown header version %u\n",
- package_header->header_ver);
- return 0;
- }
-
- /*
- * We should always have space for max_entries,
- * even if not all are used
- */
- package_size += max_entries * sizeof(struct intel_fw_info);
- if (rem_size < package_size)
- goto error_truncated;
-
- if (package_header->header_len * 4 != package_size) {
- DRM_ERROR("DMC firmware has wrong package header length "
- "(%u bytes)\n", package_size);
- return 0;
- }
-
- num_entries = package_header->num_entries;
- if (WARN_ON(package_header->num_entries > max_entries))
- num_entries = max_entries;
-
- fw_info = (const struct intel_fw_info *)
- ((u8 *)package_header + sizeof(*package_header));
- dmc_offset = find_dmc_fw_offset(fw_info, num_entries, si,
- package_header->header_ver);
- if (dmc_offset == CSR_DEFAULT_FW_OFFSET) {
- DRM_ERROR("DMC firmware not supported for %c stepping\n",
- si->stepping);
- return 0;
- }
-
- /* dmc_offset is in dwords */
- return package_size + dmc_offset * 4;
-
-error_truncated:
- DRM_ERROR("Truncated DMC firmware, refusing.\n");
- return 0;
-}
-
-/* Return number of bytes parsed or 0 on error */
-static u32 parse_csr_fw_css(struct intel_csr *csr,
- struct intel_css_header *css_header,
- size_t rem_size)
-{
- if (rem_size < sizeof(struct intel_css_header)) {
- DRM_ERROR("Truncated DMC firmware, refusing.\n");
- return 0;
- }
-
- if (sizeof(struct intel_css_header) !=
- (css_header->header_len * 4)) {
- DRM_ERROR("DMC firmware has wrong CSS header length "
- "(%u bytes)\n",
- (css_header->header_len * 4));
- return 0;
- }
-
- if (csr->required_version &&
- css_header->version != csr->required_version) {
- DRM_INFO("Refusing to load DMC firmware v%u.%u,"
- " please use v%u.%u\n",
- CSR_VERSION_MAJOR(css_header->version),
- CSR_VERSION_MINOR(css_header->version),
- CSR_VERSION_MAJOR(csr->required_version),
- CSR_VERSION_MINOR(csr->required_version));
- return 0;
- }
-
- csr->version = css_header->version;
-
- return sizeof(struct intel_css_header);
-}
-
-static void parse_csr_fw(struct drm_i915_private *dev_priv,
- const struct firmware *fw)
-{
- struct intel_css_header *css_header;
- struct intel_package_header *package_header;
- struct intel_dmc_header_base *dmc_header;
- struct intel_csr *csr = &dev_priv->csr;
- const struct stepping_info *si = intel_get_stepping_info(dev_priv);
- u32 readcount = 0;
- u32 r;
-
- if (!fw)
- return;
-
- /* Extract CSS Header information */
- css_header = (struct intel_css_header *)fw->data;
- r = parse_csr_fw_css(csr, css_header, fw->size);
- if (!r)
- return;
-
- readcount += r;
-
- /* Extract Package Header information */
- package_header = (struct intel_package_header *)&fw->data[readcount];
- r = parse_csr_fw_package(csr, package_header, si, fw->size - readcount);
- if (!r)
- return;
-
- readcount += r;
-
- /* Extract dmc_header information */
- dmc_header = (struct intel_dmc_header_base *)&fw->data[readcount];
- parse_csr_fw_dmc(csr, dmc_header, fw->size - readcount);
-}
-
-static void intel_csr_runtime_pm_get(struct drm_i915_private *dev_priv)
-{
- drm_WARN_ON(&dev_priv->drm, dev_priv->csr.wakeref);
- dev_priv->csr.wakeref =
- intel_display_power_get(dev_priv, POWER_DOMAIN_INIT);
-}
-
-static void intel_csr_runtime_pm_put(struct drm_i915_private *dev_priv)
-{
- intel_wakeref_t wakeref __maybe_unused =
- fetch_and_zero(&dev_priv->csr.wakeref);
-
- intel_display_power_put(dev_priv, POWER_DOMAIN_INIT, wakeref);
-}
-
-static void csr_load_work_fn(struct work_struct *work)
-{
- struct drm_i915_private *dev_priv;
- struct intel_csr *csr;
- const struct firmware *fw = NULL;
-
- dev_priv = container_of(work, typeof(*dev_priv), csr.work);
- csr = &dev_priv->csr;
-
- request_firmware(&fw, dev_priv->csr.fw_path, &dev_priv->drm.pdev->dev);
- parse_csr_fw(dev_priv, fw);
-
- if (dev_priv->csr.dmc_payload) {
- intel_csr_load_program(dev_priv);
- intel_csr_runtime_pm_put(dev_priv);
-
- drm_info(&dev_priv->drm,
- "Finished loading DMC firmware %s (v%u.%u)\n",
- dev_priv->csr.fw_path, CSR_VERSION_MAJOR(csr->version),
- CSR_VERSION_MINOR(csr->version));
- } else {
- drm_notice(&dev_priv->drm,
- "Failed to load DMC firmware %s."
- " Disabling runtime power management.\n",
- csr->fw_path);
- drm_notice(&dev_priv->drm, "DMC firmware homepage: %s",
- INTEL_UC_FIRMWARE_URL);
- }
-
- release_firmware(fw);
-}
-
-/**
- * intel_csr_ucode_init() - initialize the firmware loading.
- * @dev_priv: i915 drm device.
- *
- * This function is called at the time of loading the display driver to read
- * firmware from a .bin file and copied into a internal memory.
- */
-void intel_csr_ucode_init(struct drm_i915_private *dev_priv)
-{
- struct intel_csr *csr = &dev_priv->csr;
-
- INIT_WORK(&dev_priv->csr.work, csr_load_work_fn);
-
- if (!HAS_CSR(dev_priv))
- return;
-
- /*
- * Obtain a runtime pm reference, until CSR is loaded, to avoid entering
- * runtime-suspend.
- *
- * On error, we return with the rpm wakeref held to prevent runtime
- * suspend as runtime suspend *requires* a working CSR for whatever
- * reason.
- */
- intel_csr_runtime_pm_get(dev_priv);
-
- if (INTEL_GEN(dev_priv) >= 12) {
- csr->fw_path = TGL_CSR_PATH;
- csr->required_version = TGL_CSR_VERSION_REQUIRED;
- /* Allow to load fw via parameter using the last known size */
- csr->max_fw_size = GEN12_CSR_MAX_FW_SIZE;
- } else if (IS_GEN(dev_priv, 11)) {
- csr->fw_path = ICL_CSR_PATH;
- csr->required_version = ICL_CSR_VERSION_REQUIRED;
- csr->max_fw_size = ICL_CSR_MAX_FW_SIZE;
- } else if (IS_CANNONLAKE(dev_priv)) {
- csr->fw_path = CNL_CSR_PATH;
- csr->required_version = CNL_CSR_VERSION_REQUIRED;
- csr->max_fw_size = CNL_CSR_MAX_FW_SIZE;
- } else if (IS_GEMINILAKE(dev_priv)) {
- csr->fw_path = GLK_CSR_PATH;
- csr->required_version = GLK_CSR_VERSION_REQUIRED;
- csr->max_fw_size = GLK_CSR_MAX_FW_SIZE;
- } else if (IS_KABYLAKE(dev_priv) || IS_COFFEELAKE(dev_priv)) {
- csr->fw_path = KBL_CSR_PATH;
- csr->required_version = KBL_CSR_VERSION_REQUIRED;
- csr->max_fw_size = KBL_CSR_MAX_FW_SIZE;
- } else if (IS_SKYLAKE(dev_priv)) {
- csr->fw_path = SKL_CSR_PATH;
- csr->required_version = SKL_CSR_VERSION_REQUIRED;
- csr->max_fw_size = SKL_CSR_MAX_FW_SIZE;
- } else if (IS_BROXTON(dev_priv)) {
- csr->fw_path = BXT_CSR_PATH;
- csr->required_version = BXT_CSR_VERSION_REQUIRED;
- csr->max_fw_size = BXT_CSR_MAX_FW_SIZE;
- }
-
- if (i915_modparams.dmc_firmware_path) {
- if (strlen(i915_modparams.dmc_firmware_path) == 0) {
- csr->fw_path = NULL;
- drm_info(&dev_priv->drm,
- "Disabling CSR firmware and runtime PM\n");
- return;
- }
-
- csr->fw_path = i915_modparams.dmc_firmware_path;
- /* Bypass version check for firmware override. */
- csr->required_version = 0;
- }
-
- if (csr->fw_path == NULL) {
- drm_dbg_kms(&dev_priv->drm,
- "No known CSR firmware for platform, disabling runtime PM\n");
- return;
- }
-
- drm_dbg_kms(&dev_priv->drm, "Loading %s\n", csr->fw_path);
- schedule_work(&dev_priv->csr.work);
-}
-
-/**
- * intel_csr_ucode_suspend() - prepare CSR firmware before system suspend
- * @dev_priv: i915 drm device
- *
- * Prepare the DMC firmware before entering system suspend. This includes
- * flushing pending work items and releasing any resources acquired during
- * init.
- */
-void intel_csr_ucode_suspend(struct drm_i915_private *dev_priv)
-{
- if (!HAS_CSR(dev_priv))
- return;
-
- flush_work(&dev_priv->csr.work);
-
- /* Drop the reference held in case DMC isn't loaded. */
- if (!dev_priv->csr.dmc_payload)
- intel_csr_runtime_pm_put(dev_priv);
-}
-
-/**
- * intel_csr_ucode_resume() - init CSR firmware during system resume
- * @dev_priv: i915 drm device
- *
- * Reinitialize the DMC firmware during system resume, reacquiring any
- * resources released in intel_csr_ucode_suspend().
- */
-void intel_csr_ucode_resume(struct drm_i915_private *dev_priv)
-{
- if (!HAS_CSR(dev_priv))
- return;
-
- /*
- * Reacquire the reference to keep RPM disabled in case DMC isn't
- * loaded.
- */
- if (!dev_priv->csr.dmc_payload)
- intel_csr_runtime_pm_get(dev_priv);
-}
-
-/**
- * intel_csr_ucode_fini() - unload the CSR firmware.
- * @dev_priv: i915 drm device.
- *
- * Firmmware unloading includes freeing the internal memory and reset the
- * firmware loading status.
- */
-void intel_csr_ucode_fini(struct drm_i915_private *dev_priv)
-{
- if (!HAS_CSR(dev_priv))
- return;
-
- intel_csr_ucode_suspend(dev_priv);
- drm_WARN_ON(&dev_priv->drm, dev_priv->csr.wakeref);
-
- kfree(dev_priv->csr.dmc_payload);
-}
+++ /dev/null
-/* SPDX-License-Identifier: MIT */
-/*
- * Copyright © 2019 Intel Corporation
- */
-
-#ifndef __INTEL_CSR_H__
-#define __INTEL_CSR_H__
-
-struct drm_i915_private;
-
-#define CSR_VERSION(major, minor) ((major) << 16 | (minor))
-#define CSR_VERSION_MAJOR(version) ((version) >> 16)
-#define CSR_VERSION_MINOR(version) ((version) & 0xffff)
-
-void intel_csr_ucode_init(struct drm_i915_private *i915);
-void intel_csr_load_program(struct drm_i915_private *i915);
-void intel_csr_ucode_fini(struct drm_i915_private *i915);
-void intel_csr_ucode_suspend(struct drm_i915_private *i915);
-void intel_csr_ucode_resume(struct drm_i915_private *i915);
-
-#endif /* __INTEL_CSR_H__ */
projects / kernel.git / commitdiff