From 28133176082d9bcafb5958b8fac80943e51d5eda Mon Sep 17 00:00:00 2001 From: Francois Romieu Date: Fri, 11 Jul 2008 00:05:17 +0200 Subject: [PATCH] via-velocity: move residual free rx descriptors count register update Updates of the RBRDU have two different meanings depending on their context: 1. the receiving process has not started - the value which is written into the RBRDU register is supposed to be the free rx descriptors count (rounded to a multiple of 4) 2. the receiving process is running - the value increments the count above (sic) The update is currently issued deep inside the rx replenish chain (see velocity_give_many_rx_descs). Let's propagate enough information to the caller so that the rx replenish functions do not depend on hardware any more. It is needed to perform the Rx/Tx buffers housekeeping when MTU changes. Signed-off-by: Francois Romieu Signed-off-by: Jeff Garzik --- drivers/net/via-velocity.c | 28 ++++++++++++++-------------- 1 file changed, 14 insertions(+), 14 deletions(-) diff --git a/drivers/net/via-velocity.c b/drivers/net/via-velocity.c index 86b256cbea..086d69c199 100644 --- a/drivers/net/via-velocity.c +++ b/drivers/net/via-velocity.c @@ -1155,7 +1155,7 @@ static void velocity_free_rings(struct velocity_info *vptr) pci_free_consistent(vptr->pdev, size, vptr->rd_ring, vptr->rd_pool_dma); } -static inline void velocity_give_many_rx_descs(struct velocity_info *vptr) +static void velocity_give_many_rx_descs(struct velocity_info *vptr) { struct mac_regs __iomem *regs = vptr->mac_regs; int avail, dirty, unusable; @@ -1182,7 +1182,7 @@ static inline void velocity_give_many_rx_descs(struct velocity_info *vptr) static int velocity_rx_refill(struct velocity_info *vptr) { - int dirty = vptr->rd_dirty, done = 0, ret = 0; + int dirty = vptr->rd_dirty, done = 0; do { struct rx_desc *rd = vptr->rd_ring + dirty; @@ -1192,8 +1192,7 @@ static int velocity_rx_refill(struct velocity_info *vptr) break; if (!vptr->rd_info[dirty].skb) { - ret = velocity_alloc_rx_buf(vptr, dirty); - if (ret < 0) + if (velocity_alloc_rx_buf(vptr, dirty) < 0) break; } done++; @@ -1203,10 +1202,9 @@ static int velocity_rx_refill(struct velocity_info *vptr) if (done) { vptr->rd_dirty = dirty; vptr->rd_filled += done; - velocity_give_many_rx_descs(vptr); } - return ret; + return done; } /** @@ -1219,25 +1217,27 @@ static int velocity_rx_refill(struct velocity_info *vptr) static int velocity_init_rd_ring(struct velocity_info *vptr) { - int ret; int mtu = vptr->dev->mtu; + int ret = -ENOMEM; vptr->rx_buf_sz = (mtu <= ETH_DATA_LEN) ? PKT_BUF_SZ : mtu + 32; vptr->rd_info = kcalloc(vptr->options.numrx, sizeof(struct velocity_rd_info), GFP_KERNEL); if (!vptr->rd_info) - return -ENOMEM; + goto out; vptr->rd_filled = vptr->rd_dirty = vptr->rd_curr = 0; - ret = velocity_rx_refill(vptr); - if (ret < 0) { + if (velocity_rx_refill(vptr) != vptr->options.numrx) { VELOCITY_PRT(MSG_LEVEL_ERR, KERN_ERR "%s: failed to allocate RX buffer.\n", vptr->dev->name); velocity_free_rd_ring(vptr); + goto out; } + ret = 0; +out: return ret; } @@ -1412,10 +1412,8 @@ static int velocity_rx_srv(struct velocity_info *vptr, int status) vptr->rd_curr = rd_curr; - if (works > 0 && velocity_rx_refill(vptr) < 0) { - VELOCITY_PRT(MSG_LEVEL_ERR, KERN_ERR - "%s: rx buf allocation failure\n", vptr->dev->name); - } + if ((works > 0) && (velocity_rx_refill(vptr) > 0)) + velocity_give_many_rx_descs(vptr); VAR_USED(stats); return works; @@ -1877,6 +1875,8 @@ static int velocity_open(struct net_device *dev) /* Ensure chip is running */ pci_set_power_state(vptr->pdev, PCI_D0); + velocity_give_many_rx_descs(vptr); + velocity_init_registers(vptr, VELOCITY_INIT_COLD); ret = request_irq(vptr->pdev->irq, &velocity_intr, IRQF_SHARED, -- 2.39.5