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myri10ge: fix the number of interrupt slots

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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 <brice@myri.com>
Signed-off-by: Andrew Gallatin <gallatin@myri.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Brice Goglin 2008-05-09 02:20:47 +02:00 committed by Jeff Garzik
parent fa0a90d96b
commit 014377a1df
1 changed files with 5 additions and 9 deletions
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14
drivers/net/myri10ge/myri10ge.c
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@ -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);