From 014377a1df693ff30a9e8b69f0bbb0a38e601f75 Mon Sep 17 00:00:00 2001 From: Brice Goglin Date: Fri, 9 May 2008 02:20:47 +0200 Subject: [PATCH] myri10ge: fix the number of interrupt slots Fix a long-standing bug/misunderstanding between the driver and the firmware. The size of the interrupt queue must be set to the number of rx slots (big + small), and it should never have been a tunable. Setting it too small results in chaos. Signed-off-by: Brice Goglin Signed-off-by: Andrew Gallatin Signed-off-by: Jeff Garzik --- drivers/net/myri10ge/myri10ge.c | 14 +++++--------- 1 file changed, 5 insertions(+), 9 deletions(-) diff --git a/drivers/net/myri10ge/myri10ge.c b/drivers/net/myri10ge/myri10ge.c index 054168faf2..c91b12ea26 100644 --- a/drivers/net/myri10ge/myri10ge.c +++ b/drivers/net/myri10ge/myri10ge.c @@ -253,10 +253,6 @@ static int myri10ge_ecrc_enable = 1; module_param(myri10ge_ecrc_enable, int, S_IRUGO); MODULE_PARM_DESC(myri10ge_ecrc_enable, "Enable Extended CRC on PCI-E"); -static int myri10ge_max_intr_slots = 1024; -module_param(myri10ge_max_intr_slots, int, S_IRUGO); -MODULE_PARM_DESC(myri10ge_max_intr_slots, "Interrupt queue slots"); - static int myri10ge_small_bytes = -1; /* -1 == auto */ module_param(myri10ge_small_bytes, int, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(myri10ge_small_bytes, "Threshold of small packets"); @@ -879,7 +875,7 @@ static int myri10ge_reset(struct myri10ge_priv *mgp) /* Now exchange information about interrupts */ - bytes = myri10ge_max_intr_slots * sizeof(*mgp->ss.rx_done.entry); + bytes = mgp->max_intr_slots * sizeof(*mgp->ss.rx_done.entry); memset(mgp->ss.rx_done.entry, 0, bytes); cmd.data0 = (u32) bytes; status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_SIZE, &cmd, 0); @@ -1217,7 +1213,7 @@ myri10ge_clean_rx_done(struct myri10ge_slice_state *ss, int budget) rx_packets += rx_ok; rx_bytes += rx_ok * (unsigned long)length; cnt++; - idx = cnt & (myri10ge_max_intr_slots - 1); + idx = cnt & (mgp->max_intr_slots - 1); work_done++; } rx_done->idx = idx; @@ -3218,7 +3214,7 @@ static int myri10ge_probe(struct pci_dev *pdev, const struct pci_device_id *ent) netdev->dev_addr[i] = mgp->mac_addr[i]; /* allocate rx done ring */ - bytes = myri10ge_max_intr_slots * sizeof(*mgp->ss.rx_done.entry); + bytes = mgp->max_intr_slots * sizeof(*mgp->ss.rx_done.entry); mgp->ss.rx_done.entry = dma_alloc_coherent(&pdev->dev, bytes, &mgp->ss.rx_done.bus, GFP_KERNEL); if (mgp->ss.rx_done.entry == NULL) @@ -3295,7 +3291,7 @@ abort_with_firmware: myri10ge_dummy_rdma(mgp, 0); abort_with_rx_done: - bytes = myri10ge_max_intr_slots * sizeof(*mgp->ss.rx_done.entry); + bytes = mgp->max_intr_slots * sizeof(*mgp->ss.rx_done.entry); dma_free_coherent(&pdev->dev, bytes, mgp->ss.rx_done.entry, mgp->ss.rx_done.bus); @@ -3346,7 +3342,7 @@ static void myri10ge_remove(struct pci_dev *pdev) /* avoid a memory leak */ pci_restore_state(pdev); - bytes = myri10ge_max_intr_slots * sizeof(*mgp->ss.rx_done.entry); + bytes = mgp->max_intr_slots * sizeof(*mgp->ss.rx_done.entry); dma_free_coherent(&pdev->dev, bytes, mgp->ss.rx_done.entry, mgp->ss.rx_done.bus); -- 2.39.5