From 9fa520877d70632bfc6f5c7d21b6ed6b3475d805 Mon Sep 17 00:00:00 2001 From: Finn Thain Date: Sun, 16 Feb 2020 08:03:32 +1100 Subject: [PATCH] net/sonic: Refactor duplicated code No functional change. Tested-by: Stan Johnson Signed-off-by: Finn Thain Signed-off-by: David S. Miller --- drivers/net/ethernet/natsemi/jazzsonic.c | 31 ++---------------- drivers/net/ethernet/natsemi/macsonic.c | 29 ++--------------- drivers/net/ethernet/natsemi/sonic.c | 36 +++++++++++++++++++++ drivers/net/ethernet/natsemi/sonic.h | 1 + drivers/net/ethernet/natsemi/xtsonic.c | 40 ++---------------------- 5 files changed, 44 insertions(+), 93 deletions(-) diff --git a/drivers/net/ethernet/natsemi/jazzsonic.c b/drivers/net/ethernet/natsemi/jazzsonic.c index 51fa82b429a3c..bfa0c0d396007 100644 --- a/drivers/net/ethernet/natsemi/jazzsonic.c +++ b/drivers/net/ethernet/natsemi/jazzsonic.c @@ -147,39 +147,12 @@ static int sonic_probe1(struct net_device *dev) dev->dev_addr[i*2+1] = val >> 8; } - err = -ENOMEM; - - /* Initialize the device structure. */ - lp->dma_bitmode = SONIC_BITMODE32; - /* Allocate the entire chunk of memory for the descriptors. - Note that this cannot cross a 64K boundary. */ - lp->descriptors = dma_alloc_coherent(lp->device, - SIZEOF_SONIC_DESC * - SONIC_BUS_SCALE(lp->dma_bitmode), - &lp->descriptors_laddr, - GFP_KERNEL); - if (lp->descriptors == NULL) + err = sonic_alloc_descriptors(dev); + if (err) goto out; - /* Now set up the pointers to point to the appropriate places */ - lp->cda = lp->descriptors; - lp->tda = lp->cda + (SIZEOF_SONIC_CDA - * SONIC_BUS_SCALE(lp->dma_bitmode)); - lp->rda = lp->tda + (SIZEOF_SONIC_TD * SONIC_NUM_TDS - * SONIC_BUS_SCALE(lp->dma_bitmode)); - lp->rra = lp->rda + (SIZEOF_SONIC_RD * SONIC_NUM_RDS - * SONIC_BUS_SCALE(lp->dma_bitmode)); - - lp->cda_laddr = lp->descriptors_laddr; - lp->tda_laddr = lp->cda_laddr + (SIZEOF_SONIC_CDA - * SONIC_BUS_SCALE(lp->dma_bitmode)); - lp->rda_laddr = lp->tda_laddr + (SIZEOF_SONIC_TD * SONIC_NUM_TDS - * SONIC_BUS_SCALE(lp->dma_bitmode)); - lp->rra_laddr = lp->rda_laddr + (SIZEOF_SONIC_RD * SONIC_NUM_RDS - * SONIC_BUS_SCALE(lp->dma_bitmode)); - dev->netdev_ops = &sonic_netdev_ops; dev->watchdog_timeo = TX_TIMEOUT; diff --git a/drivers/net/ethernet/natsemi/macsonic.c b/drivers/net/ethernet/natsemi/macsonic.c index 0937fc2a928ed..0f4d0c25d626c 100644 --- a/drivers/net/ethernet/natsemi/macsonic.c +++ b/drivers/net/ethernet/natsemi/macsonic.c @@ -186,33 +186,10 @@ static const struct net_device_ops macsonic_netdev_ops = { static int macsonic_init(struct net_device *dev) { struct sonic_local* lp = netdev_priv(dev); + int err = sonic_alloc_descriptors(dev); - /* Allocate the entire chunk of memory for the descriptors. - Note that this cannot cross a 64K boundary. */ - lp->descriptors = dma_alloc_coherent(lp->device, - SIZEOF_SONIC_DESC * - SONIC_BUS_SCALE(lp->dma_bitmode), - &lp->descriptors_laddr, - GFP_KERNEL); - if (lp->descriptors == NULL) - return -ENOMEM; - - /* Now set up the pointers to point to the appropriate places */ - lp->cda = lp->descriptors; - lp->tda = lp->cda + (SIZEOF_SONIC_CDA - * SONIC_BUS_SCALE(lp->dma_bitmode)); - lp->rda = lp->tda + (SIZEOF_SONIC_TD * SONIC_NUM_TDS - * SONIC_BUS_SCALE(lp->dma_bitmode)); - lp->rra = lp->rda + (SIZEOF_SONIC_RD * SONIC_NUM_RDS - * SONIC_BUS_SCALE(lp->dma_bitmode)); - - lp->cda_laddr = lp->descriptors_laddr; - lp->tda_laddr = lp->cda_laddr + (SIZEOF_SONIC_CDA - * SONIC_BUS_SCALE(lp->dma_bitmode)); - lp->rda_laddr = lp->tda_laddr + (SIZEOF_SONIC_TD * SONIC_NUM_TDS - * SONIC_BUS_SCALE(lp->dma_bitmode)); - lp->rra_laddr = lp->rda_laddr + (SIZEOF_SONIC_RD * SONIC_NUM_RDS - * SONIC_BUS_SCALE(lp->dma_bitmode)); + if (err) + return err; dev->netdev_ops = &macsonic_netdev_ops; dev->watchdog_timeo = TX_TIMEOUT; diff --git a/drivers/net/ethernet/natsemi/sonic.c b/drivers/net/ethernet/natsemi/sonic.c index e01273654f815..c066510b348ef 100644 --- a/drivers/net/ethernet/natsemi/sonic.c +++ b/drivers/net/ethernet/natsemi/sonic.c @@ -50,6 +50,42 @@ static void sonic_msg_init(struct net_device *dev) netif_dbg(lp, drv, dev, "%s", version); } +static int sonic_alloc_descriptors(struct net_device *dev) +{ + struct sonic_local *lp = netdev_priv(dev); + + /* Allocate a chunk of memory for the descriptors. Note that this + * must not cross a 64K boundary. It is smaller than one page which + * means that page alignment is a sufficient condition. + */ + lp->descriptors = + dma_alloc_coherent(lp->device, + SIZEOF_SONIC_DESC * + SONIC_BUS_SCALE(lp->dma_bitmode), + &lp->descriptors_laddr, GFP_KERNEL); + + if (!lp->descriptors) + return -ENOMEM; + + lp->cda = lp->descriptors; + lp->tda = lp->cda + SIZEOF_SONIC_CDA * + SONIC_BUS_SCALE(lp->dma_bitmode); + lp->rda = lp->tda + SIZEOF_SONIC_TD * SONIC_NUM_TDS * + SONIC_BUS_SCALE(lp->dma_bitmode); + lp->rra = lp->rda + SIZEOF_SONIC_RD * SONIC_NUM_RDS * + SONIC_BUS_SCALE(lp->dma_bitmode); + + lp->cda_laddr = lp->descriptors_laddr; + lp->tda_laddr = lp->cda_laddr + SIZEOF_SONIC_CDA * + SONIC_BUS_SCALE(lp->dma_bitmode); + lp->rda_laddr = lp->tda_laddr + SIZEOF_SONIC_TD * SONIC_NUM_TDS * + SONIC_BUS_SCALE(lp->dma_bitmode); + lp->rra_laddr = lp->rda_laddr + SIZEOF_SONIC_RD * SONIC_NUM_RDS * + SONIC_BUS_SCALE(lp->dma_bitmode); + + return 0; +} + /* * Open/initialize the SONIC controller. * diff --git a/drivers/net/ethernet/natsemi/sonic.h b/drivers/net/ethernet/natsemi/sonic.h index e0e4cba6f6f6f..053f12f5cf4a6 100644 --- a/drivers/net/ethernet/natsemi/sonic.h +++ b/drivers/net/ethernet/natsemi/sonic.h @@ -342,6 +342,7 @@ static void sonic_multicast_list(struct net_device *dev); static int sonic_init(struct net_device *dev); static void sonic_tx_timeout(struct net_device *dev, unsigned int txqueue); static void sonic_msg_init(struct net_device *dev); +static int sonic_alloc_descriptors(struct net_device *dev); /* Internal inlines for reading/writing DMA buffers. Note that bus size and endianness matter here, whereas they don't for registers, diff --git a/drivers/net/ethernet/natsemi/xtsonic.c b/drivers/net/ethernet/natsemi/xtsonic.c index e1b886e87a762..dda9ec7d9cee4 100644 --- a/drivers/net/ethernet/natsemi/xtsonic.c +++ b/drivers/net/ethernet/natsemi/xtsonic.c @@ -167,47 +167,11 @@ static int __init sonic_probe1(struct net_device *dev) dev->dev_addr[i*2+1] = val >> 8; } - /* Initialize the device structure. */ - lp->dma_bitmode = SONIC_BITMODE32; - /* - * Allocate local private descriptor areas in uncached space. - * The entire structure must be located within the same 64kb segment. - * A simple way to ensure this is to allocate twice the - * size of the structure -- given that the structure is - * much less than 64 kB, at least one of the halves of - * the allocated area will be contained entirely in 64 kB. - * We also allocate extra space for a pointer to allow freeing - * this structure later on (in xtsonic_cleanup_module()). - */ - lp->descriptors = dma_alloc_coherent(lp->device, - SIZEOF_SONIC_DESC * - SONIC_BUS_SCALE(lp->dma_bitmode), - &lp->descriptors_laddr, - GFP_KERNEL); - if (lp->descriptors == NULL) { - err = -ENOMEM; + err = sonic_alloc_descriptors(dev); + if (err) goto out; - } - - lp->cda = lp->descriptors; - lp->tda = lp->cda + (SIZEOF_SONIC_CDA - * SONIC_BUS_SCALE(lp->dma_bitmode)); - lp->rda = lp->tda + (SIZEOF_SONIC_TD * SONIC_NUM_TDS - * SONIC_BUS_SCALE(lp->dma_bitmode)); - lp->rra = lp->rda + (SIZEOF_SONIC_RD * SONIC_NUM_RDS - * SONIC_BUS_SCALE(lp->dma_bitmode)); - - /* get the virtual dma address */ - - lp->cda_laddr = lp->descriptors_laddr; - lp->tda_laddr = lp->cda_laddr + (SIZEOF_SONIC_CDA - * SONIC_BUS_SCALE(lp->dma_bitmode)); - lp->rda_laddr = lp->tda_laddr + (SIZEOF_SONIC_TD * SONIC_NUM_TDS - * SONIC_BUS_SCALE(lp->dma_bitmode)); - lp->rra_laddr = lp->rda_laddr + (SIZEOF_SONIC_RD * SONIC_NUM_RDS - * SONIC_BUS_SCALE(lp->dma_bitmode)); dev->netdev_ops = &xtsonic_netdev_ops; dev->watchdog_timeo = TX_TIMEOUT; -- 2.39.5