Skip to content

L
linux
Commit b5bab85c authored by Vasanthy Kolluri's avatar Vasanthy Kolluri Committed by David S. Miller
Browse files
Options

enic: Use receive queue buffer blocks of 32/64 entries 

Change the receive queue buffer allocations into blocks of 32 entries when
ring size is less than 64, otherwise use 64 entries per block.
Signed-off-by: default avatarScott Feldman <scofeldm@cisco.com>
Signed-off-by: default avatarVasanthy Kolluri <vkolluri@cisco.com>
Signed-off-by: default avatarRoopa Prabhu <roprabhu@cisco.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 70feadf3
Hide whitespace changes
Inline Side-by-side
Showing with 37 additions and 26 deletions
drivers/net/enic/vnic_rq.c
View file @ b5bab85c
...@@ -37,7 +37,7 @@ static int vnic_rq_alloc_bufs(struct vnic_rq *rq) ...@@ -37,7 +37,7 @@ static int vnic_rq_alloc_bufs(struct vnic_rq *rq)
vdev = rq->vdev; vdev = rq->vdev;
for (i = 0; i < blks; i++) { 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]) { if (!rq->bufs[i]) {
pr_err("Failed to alloc rq_bufs\n"); pr_err("Failed to alloc rq_bufs\n");
return -ENOMEM; return -ENOMEM;
...@@ -46,14 +46,14 @@ static int vnic_rq_alloc_bufs(struct vnic_rq *rq) ...@@ -46,14 +46,14 @@ static int vnic_rq_alloc_bufs(struct vnic_rq *rq)
for (i = 0; i < blks; i++) { for (i = 0; i < blks; i++) {
buf = rq->bufs[i]; buf = rq->bufs[i];
for (j = 0; j < 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 + j; buf->index = i * VNIC_RQ_BUF_BLK_ENTRIES(count) + j;
buf->desc = (u8 *)rq->ring.descs + buf->desc = (u8 *)rq->ring.descs +
rq->ring.desc_size * buf->index; rq->ring.desc_size * buf->index;
if (buf->index + 1 == count) { if (buf->index + 1 == count) {
buf->next = rq->bufs[0]; buf->next = rq->bufs[0];
break; 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]; buf->next = rq->bufs[i + 1];
} else { } else {
buf->next = buf + 1; buf->next = buf + 1;
...@@ -119,10 +119,11 @@ void vnic_rq_init_start(struct vnic_rq *rq, unsigned int cq_index, ...@@ -119,10 +119,11 @@ void vnic_rq_init_start(struct vnic_rq *rq, unsigned int cq_index,
unsigned int error_interrupt_offset) unsigned int error_interrupt_offset)
{ {
u64 paddr; u64 paddr;
unsigned int count = rq->ring.desc_count;
paddr = (u64)rq->ring.base_addr | VNIC_PADDR_TARGET; paddr = (u64)rq->ring.base_addr | VNIC_PADDR_TARGET;
writeq(paddr, &rq->ctrl->ring_base); 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(cq_index, &rq->ctrl->cq_index);
iowrite32(error_interrupt_enable, &rq->ctrl->error_interrupt_enable); iowrite32(error_interrupt_enable, &rq->ctrl->error_interrupt_enable);
iowrite32(error_interrupt_offset, &rq->ctrl->error_interrupt_offset); 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, ...@@ -132,8 +133,8 @@ void vnic_rq_init_start(struct vnic_rq *rq, unsigned int cq_index,
iowrite32(posted_index, &rq->ctrl->posted_index); iowrite32(posted_index, &rq->ctrl->posted_index);
rq->to_use = rq->to_clean = rq->to_use = rq->to_clean =
&rq->bufs[fetch_index / VNIC_RQ_BUF_BLK_ENTRIES] &rq->bufs[fetch_index / VNIC_RQ_BUF_BLK_ENTRIES(count)]
[fetch_index % VNIC_RQ_BUF_BLK_ENTRIES]; [fetch_index % VNIC_RQ_BUF_BLK_ENTRIES(count)];
} }
void vnic_rq_init(struct vnic_rq *rq, unsigned int cq_index, void vnic_rq_init(struct vnic_rq *rq, unsigned int cq_index,
...@@ -184,6 +185,7 @@ void vnic_rq_clean(struct vnic_rq *rq, ...@@ -184,6 +185,7 @@ void vnic_rq_clean(struct vnic_rq *rq,
{ {
struct vnic_rq_buf *buf; struct vnic_rq_buf *buf;
u32 fetch_index; u32 fetch_index;
unsigned int count = rq->ring.desc_count;
BUG_ON(ioread32(&rq->ctrl->enable)); BUG_ON(ioread32(&rq->ctrl->enable));
...@@ -200,8 +202,8 @@ void vnic_rq_clean(struct vnic_rq *rq, ...@@ -200,8 +202,8 @@ void vnic_rq_clean(struct vnic_rq *rq,
/* Use current fetch_index as the ring starting point */ /* Use current fetch_index as the ring starting point */
fetch_index = ioread32(&rq->ctrl->fetch_index); fetch_index = ioread32(&rq->ctrl->fetch_index);
rq->to_use = rq->to_clean = rq->to_use = rq->to_clean =
&rq->bufs[fetch_index / VNIC_RQ_BUF_BLK_ENTRIES] &rq->bufs[fetch_index / VNIC_RQ_BUF_BLK_ENTRIES(count)]
[fetch_index % VNIC_RQ_BUF_BLK_ENTRIES]; [fetch_index % VNIC_RQ_BUF_BLK_ENTRIES(count)];
iowrite32(fetch_index, &rq->ctrl->posted_index); iowrite32(fetch_index, &rq->ctrl->posted_index);
vnic_dev_clear_desc_ring(&rq->ring); vnic_dev_clear_desc_ring(&rq->ring);
......
drivers/net/enic/vnic_rq.h
View file @ b5bab85c
...@@ -52,12 +52,16 @@ struct vnic_rq_ctrl { ...@@ -52,12 +52,16 @@ struct vnic_rq_ctrl {
u32 pad10; u32 pad10;
}; };
/* Break the vnic_rq_buf allocations into blocks of 64 entries */ /* Break the vnic_rq_buf allocations into blocks of 32/64 entries */
#define VNIC_RQ_BUF_BLK_ENTRIES 64 #define VNIC_RQ_BUF_MIN_BLK_ENTRIES 32
#define VNIC_RQ_BUF_BLK_SZ \ #define VNIC_RQ_BUF_DFLT_BLK_ENTRIES 64
(VNIC_RQ_BUF_BLK_ENTRIES * sizeof(struct vnic_rq_buf)) #define VNIC_RQ_BUF_BLK_ENTRIES(entries) \
((unsigned int)((entries < VNIC_RQ_BUF_DFLT_BLK_ENTRIES) ? \
VNIC_RQ_BUF_MIN_BLK_ENTRIES : VNIC_RQ_BUF_DFLT_BLK_ENTRIES))
#define VNIC_RQ_BUF_BLK_SZ(entries) \
(VNIC_RQ_BUF_BLK_ENTRIES(entries) * sizeof(struct vnic_rq_buf))
#define VNIC_RQ_BUF_BLKS_NEEDED(entries) \ #define VNIC_RQ_BUF_BLKS_NEEDED(entries) \
DIV_ROUND_UP(entries, VNIC_RQ_BUF_BLK_ENTRIES) DIV_ROUND_UP(entries, VNIC_RQ_BUF_BLK_ENTRIES(entries))
#define VNIC_RQ_BUF_BLKS_MAX VNIC_RQ_BUF_BLKS_NEEDED(4096) #define VNIC_RQ_BUF_BLKS_MAX VNIC_RQ_BUF_BLKS_NEEDED(4096)
struct vnic_rq_buf { struct vnic_rq_buf {
......
drivers/net/enic/vnic_wq.c
View file @ b5bab85c
...@@ -37,7 +37,7 @@ static int vnic_wq_alloc_bufs(struct vnic_wq *wq) ...@@ -37,7 +37,7 @@ static int vnic_wq_alloc_bufs(struct vnic_wq *wq)
vdev = wq->vdev; vdev = wq->vdev;
for (i = 0; i < blks; i++) { for (i = 0; i < blks; i++) {
wq->bufs[i] = kzalloc(VNIC_WQ_BUF_BLK_SZ, GFP_ATOMIC); wq->bufs[i] = kzalloc(VNIC_WQ_BUF_BLK_SZ(count), GFP_ATOMIC);
if (!wq->bufs[i]) { if (!wq->bufs[i]) {
pr_err("Failed to alloc wq_bufs\n"); pr_err("Failed to alloc wq_bufs\n");
return -ENOMEM; return -ENOMEM;
...@@ -46,14 +46,14 @@ static int vnic_wq_alloc_bufs(struct vnic_wq *wq) ...@@ -46,14 +46,14 @@ static int vnic_wq_alloc_bufs(struct vnic_wq *wq)
for (i = 0; i < blks; i++) { for (i = 0; i < blks; i++) {
buf = wq->bufs[i]; buf = wq->bufs[i];
for (j = 0; j < VNIC_WQ_BUF_BLK_ENTRIES; j++) { for (j = 0; j < VNIC_WQ_BUF_BLK_ENTRIES(count); j++) {
buf->index = i * VNIC_WQ_BUF_BLK_ENTRIES + j; buf->index = i * VNIC_WQ_BUF_BLK_ENTRIES(count) + j;
buf->desc = (u8 *)wq->ring.descs + buf->desc = (u8 *)wq->ring.descs +
wq->ring.desc_size * buf->index; wq->ring.desc_size * buf->index;
if (buf->index + 1 == count) { if (buf->index + 1 == count) {
buf->next = wq->bufs[0]; buf->next = wq->bufs[0];
break; break;
} else if (j + 1 == VNIC_WQ_BUF_BLK_ENTRIES) { } else if (j + 1 == VNIC_WQ_BUF_BLK_ENTRIES(count)) {
buf->next = wq->bufs[i + 1]; buf->next = wq->bufs[i + 1];
} else { } else {
buf->next = buf + 1; buf->next = buf + 1;
...@@ -119,10 +119,11 @@ void vnic_wq_init_start(struct vnic_wq *wq, unsigned int cq_index, ...@@ -119,10 +119,11 @@ void vnic_wq_init_start(struct vnic_wq *wq, unsigned int cq_index,
unsigned int error_interrupt_offset) unsigned int error_interrupt_offset)
{ {
u64 paddr; u64 paddr;
unsigned int count = wq->ring.desc_count;
paddr = (u64)wq->ring.base_addr | VNIC_PADDR_TARGET; paddr = (u64)wq->ring.base_addr | VNIC_PADDR_TARGET;
writeq(paddr, &wq->ctrl->ring_base); writeq(paddr, &wq->ctrl->ring_base);
iowrite32(wq->ring.desc_count, &wq->ctrl->ring_size); iowrite32(count, &wq->ctrl->ring_size);
iowrite32(fetch_index, &wq->ctrl->fetch_index); iowrite32(fetch_index, &wq->ctrl->fetch_index);
iowrite32(posted_index, &wq->ctrl->posted_index); iowrite32(posted_index, &wq->ctrl->posted_index);
iowrite32(cq_index, &wq->ctrl->cq_index); iowrite32(cq_index, &wq->ctrl->cq_index);
...@@ -131,8 +132,8 @@ void vnic_wq_init_start(struct vnic_wq *wq, unsigned int cq_index, ...@@ -131,8 +132,8 @@ void vnic_wq_init_start(struct vnic_wq *wq, unsigned int cq_index,
iowrite32(0, &wq->ctrl->error_status); iowrite32(0, &wq->ctrl->error_status);
wq->to_use = wq->to_clean = wq->to_use = wq->to_clean =
&wq->bufs[fetch_index / VNIC_WQ_BUF_BLK_ENTRIES] &wq->bufs[fetch_index / VNIC_WQ_BUF_BLK_ENTRIES(count)]
[fetch_index % VNIC_WQ_BUF_BLK_ENTRIES]; [fetch_index % VNIC_WQ_BUF_BLK_ENTRIES(count)];
} }
void vnic_wq_init(struct vnic_wq *wq, unsigned int cq_index, void vnic_wq_init(struct vnic_wq *wq, unsigned int cq_index,
......
drivers/net/enic/vnic_wq.h
View file @ b5bab85c
...@@ -60,12 +60,16 @@ struct vnic_wq_buf { ...@@ -60,12 +60,16 @@ struct vnic_wq_buf {
void *desc; void *desc;
}; };
/* Break the vnic_wq_buf allocations into blocks of 64 entries */ /* Break the vnic_wq_buf allocations into blocks of 32/64 entries */
#define VNIC_WQ_BUF_BLK_ENTRIES 64 #define VNIC_WQ_BUF_MIN_BLK_ENTRIES 32
#define VNIC_WQ_BUF_BLK_SZ \ #define VNIC_WQ_BUF_DFLT_BLK_ENTRIES 64
(VNIC_WQ_BUF_BLK_ENTRIES * sizeof(struct vnic_wq_buf)) #define VNIC_WQ_BUF_BLK_ENTRIES(entries) \
((unsigned int)((entries < VNIC_WQ_BUF_DFLT_BLK_ENTRIES) ? \
VNIC_WQ_BUF_MIN_BLK_ENTRIES : VNIC_WQ_BUF_DFLT_BLK_ENTRIES))
#define VNIC_WQ_BUF_BLK_SZ(entries) \
(VNIC_WQ_BUF_BLK_ENTRIES(entries) * sizeof(struct vnic_wq_buf))
#define VNIC_WQ_BUF_BLKS_NEEDED(entries) \ #define VNIC_WQ_BUF_BLKS_NEEDED(entries) \
DIV_ROUND_UP(entries, VNIC_WQ_BUF_BLK_ENTRIES) DIV_ROUND_UP(entries, VNIC_WQ_BUF_BLK_ENTRIES(entries))
#define VNIC_WQ_BUF_BLKS_MAX VNIC_WQ_BUF_BLKS_NEEDED(4096) #define VNIC_WQ_BUF_BLKS_MAX VNIC_WQ_BUF_BLKS_NEEDED(4096)
struct vnic_wq { struct vnic_wq {
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment
GitLab Nexedi Edition | About GitLab | About Nexedi | 沪ICP备2021021310号-2 | 沪ICP备2021021310号-7