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path: root/drivers/net/enic/vnic_rq.c
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Diffstat (limited to 'drivers/net/enic/vnic_rq.c')
-rw-r--r--drivers/net/enic/vnic_rq.c40
1 files changed, 25 insertions, 15 deletions
diff --git a/drivers/net/enic/vnic_rq.c b/drivers/net/enic/vnic_rq.c
index cc580cfec41d..dbb2aca258b9 100644
--- a/drivers/net/enic/vnic_rq.c
+++ b/drivers/net/enic/vnic_rq.c
@@ -1,5 +1,5 @@
/*
- * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2008-2010 Cisco Systems, Inc. All rights reserved.
* Copyright 2007 Nuova Systems, Inc. All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
@@ -37,23 +37,23 @@ static int vnic_rq_alloc_bufs(struct vnic_rq *rq)
vdev = rq->vdev;
for (i = 0; i < blks; i++) {
- rq->bufs[i] = kzalloc(VNIC_RQ_BUF_BLK_SZ, GFP_ATOMIC);
+ rq->bufs[i] = kzalloc(VNIC_RQ_BUF_BLK_SZ(count), GFP_ATOMIC);
if (!rq->bufs[i]) {
- printk(KERN_ERR "Failed to alloc rq_bufs\n");
+ pr_err("Failed to alloc rq_bufs\n");
return -ENOMEM;
}
}
for (i = 0; i < blks; i++) {
buf = rq->bufs[i];
- for (j = 0; j < VNIC_RQ_BUF_BLK_ENTRIES; j++) {
- buf->index = i * VNIC_RQ_BUF_BLK_ENTRIES + j;
+ for (j = 0; j < VNIC_RQ_BUF_BLK_ENTRIES(count); j++) {
+ buf->index = i * VNIC_RQ_BUF_BLK_ENTRIES(count) + j;
buf->desc = (u8 *)rq->ring.descs +
rq->ring.desc_size * buf->index;
if (buf->index + 1 == count) {
buf->next = rq->bufs[0];
break;
- } else if (j + 1 == VNIC_RQ_BUF_BLK_ENTRIES) {
+ } else if (j + 1 == VNIC_RQ_BUF_BLK_ENTRIES(count)) {
buf->next = rq->bufs[i + 1];
} else {
buf->next = buf + 1;
@@ -94,7 +94,7 @@ int vnic_rq_alloc(struct vnic_dev *vdev, struct vnic_rq *rq, unsigned int index,
rq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_RQ, index);
if (!rq->ctrl) {
- printk(KERN_ERR "Failed to hook RQ[%d] resource\n", index);
+ pr_err("Failed to hook RQ[%d] resource\n", index);
return -EINVAL;
}
@@ -119,10 +119,11 @@ void vnic_rq_init_start(struct vnic_rq *rq, unsigned int cq_index,
unsigned int error_interrupt_offset)
{
u64 paddr;
+ unsigned int count = rq->ring.desc_count;
paddr = (u64)rq->ring.base_addr | VNIC_PADDR_TARGET;
writeq(paddr, &rq->ctrl->ring_base);
- iowrite32(rq->ring.desc_count, &rq->ctrl->ring_size);
+ iowrite32(count, &rq->ctrl->ring_size);
iowrite32(cq_index, &rq->ctrl->cq_index);
iowrite32(error_interrupt_enable, &rq->ctrl->error_interrupt_enable);
iowrite32(error_interrupt_offset, &rq->ctrl->error_interrupt_offset);
@@ -132,8 +133,8 @@ void vnic_rq_init_start(struct vnic_rq *rq, unsigned int cq_index,
iowrite32(posted_index, &rq->ctrl->posted_index);
rq->to_use = rq->to_clean =
- &rq->bufs[fetch_index / VNIC_RQ_BUF_BLK_ENTRIES]
- [fetch_index % VNIC_RQ_BUF_BLK_ENTRIES];
+ &rq->bufs[fetch_index / VNIC_RQ_BUF_BLK_ENTRIES(count)]
+ [fetch_index % VNIC_RQ_BUF_BLK_ENTRIES(count)];
}
void vnic_rq_init(struct vnic_rq *rq, unsigned int cq_index,
@@ -145,6 +146,11 @@ void vnic_rq_init(struct vnic_rq *rq, unsigned int cq_index,
/* Use current fetch_index as the ring starting point */
fetch_index = ioread32(&rq->ctrl->fetch_index);
+ if (fetch_index == 0xFFFFFFFF) { /* check for hardware gone */
+ /* Hardware surprise removal: reset fetch_index */
+ fetch_index = 0;
+ }
+
vnic_rq_init_start(rq, cq_index,
fetch_index, fetch_index,
error_interrupt_enable,
@@ -174,7 +180,7 @@ int vnic_rq_disable(struct vnic_rq *rq)
udelay(10);
}
- printk(KERN_ERR "Failed to disable RQ[%d]\n", rq->index);
+ pr_err("Failed to disable RQ[%d]\n", rq->index);
return -ETIMEDOUT;
}
@@ -184,8 +190,7 @@ void vnic_rq_clean(struct vnic_rq *rq,
{
struct vnic_rq_buf *buf;
u32 fetch_index;
-
- BUG_ON(ioread32(&rq->ctrl->enable));
+ unsigned int count = rq->ring.desc_count;
buf = rq->to_clean;
@@ -199,9 +204,14 @@ void vnic_rq_clean(struct vnic_rq *rq,
/* Use current fetch_index as the ring starting point */
fetch_index = ioread32(&rq->ctrl->fetch_index);
+
+ if (fetch_index == 0xFFFFFFFF) { /* check for hardware gone */
+ /* Hardware surprise removal: reset fetch_index */
+ fetch_index = 0;
+ }
rq->to_use = rq->to_clean =
- &rq->bufs[fetch_index / VNIC_RQ_BUF_BLK_ENTRIES]
- [fetch_index % VNIC_RQ_BUF_BLK_ENTRIES];
+ &rq->bufs[fetch_index / VNIC_RQ_BUF_BLK_ENTRIES(count)]
+ [fetch_index % VNIC_RQ_BUF_BLK_ENTRIES(count)];
iowrite32(fetch_index, &rq->ctrl->posted_index);
vnic_dev_clear_desc_ring(&rq->ring);
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