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Date: Fri, 28 Aug 2009 17:02:18 -0700
From: "Matt Carlson" <mcarlson@...adcom.com>
To: davem@...emloft.net
cc: netdev@...r.kernel.org, andy@...yhouse.net
Subject: [PATCH 13/17] tg3: Convert napi handlers to use tnapi
This patch converts the napi interrupt handler functions to accept and
use tg3_napi structures.
Signed-off-by: Matt Carlson <mcarlson@...adcom.com>
---
drivers/net/tg3.c | 55 ++++++++++++++++++++++++++++++----------------------
1 files changed, 32 insertions(+), 23 deletions(-)
diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index bf9a333..27ebe3b 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -643,8 +643,9 @@ static void tg3_enable_ints(struct tg3 *tp)
tg3_cond_int(tp);
}
-static inline unsigned int tg3_has_work(struct tg3 *tp)
+static inline unsigned int tg3_has_work(struct tg3_napi *tnapi)
{
+ struct tg3 *tp = tnapi->tp;
struct tg3_hw_status *sblk = tp->hw_status;
unsigned int work_exists = 0;
@@ -663,13 +664,15 @@ static inline unsigned int tg3_has_work(struct tg3 *tp)
return work_exists;
}
-/* tg3_restart_ints
+/* tg3_int_reenable
* similar to tg3_enable_ints, but it accurately determines whether there
* is new work pending and can return without flushing the PIO write
* which reenables interrupts
*/
-static void tg3_restart_ints(struct tg3 *tp)
+static void tg3_int_reenable(struct tg3_napi *tnapi)
{
+ struct tg3 *tp = tnapi->tp;
+
tw32_mailbox(MAILBOX_INTERRUPT_0 + TG3_64BIT_REG_LOW,
tp->last_tag << 24);
mmiowb();
@@ -679,7 +682,7 @@ static void tg3_restart_ints(struct tg3 *tp)
* work we've completed.
*/
if (!(tp->tg3_flags & TG3_FLAG_TAGGED_STATUS) &&
- tg3_has_work(tp))
+ tg3_has_work(tnapi))
tw32(HOSTCC_MODE, tp->coalesce_mode |
(HOSTCC_MODE_ENABLE | HOSTCC_MODE_NOW));
}
@@ -4278,8 +4281,9 @@ static inline u32 tg3_tx_avail(struct tg3 *tp)
* need special logic to handle SKBs that have not had all
* of their frags sent yet, like SunGEM does.
*/
-static void tg3_tx(struct tg3 *tp)
+static void tg3_tx(struct tg3_napi *tnapi)
{
+ struct tg3 *tp = tnapi->tp;
u32 hw_idx = tp->hw_status->idx[0].tx_consumer;
u32 sw_idx = tp->tx_cons;
@@ -4344,9 +4348,10 @@ static void tg3_tx(struct tg3 *tp)
* buffers the cpu only reads the last cacheline of the RX descriptor
* (to fetch the error flags, vlan tag, checksum, and opaque cookie).
*/
-static int tg3_alloc_rx_skb(struct tg3 *tp, u32 opaque_key,
+static int tg3_alloc_rx_skb(struct tg3_napi *tnapi, u32 opaque_key,
int src_idx, u32 dest_idx_unmasked)
{
+ struct tg3 *tp = tnapi->tp;
struct tg3_rx_buffer_desc *desc;
struct ring_info *map, *src_map;
struct sk_buff *skb;
@@ -4409,9 +4414,10 @@ static int tg3_alloc_rx_skb(struct tg3 *tp, u32 opaque_key,
* members of the RX descriptor are invariant. See notes above
* tg3_alloc_rx_skb for full details.
*/
-static void tg3_recycle_rx(struct tg3 *tp, u32 opaque_key,
+static void tg3_recycle_rx(struct tg3_napi *tnapi, u32 opaque_key,
int src_idx, u32 dest_idx_unmasked)
{
+ struct tg3 *tp = tnapi->tp;
struct tg3_rx_buffer_desc *src_desc, *dest_desc;
struct ring_info *src_map, *dest_map;
int dest_idx;
@@ -4471,8 +4477,9 @@ static void tg3_recycle_rx(struct tg3 *tp, u32 opaque_key,
* If both the host and chip were to write into the same ring, cache line
* eviction could occur since both entities want it in an exclusive state.
*/
-static int tg3_rx(struct tg3 *tp, int budget)
+static int tg3_rx(struct tg3_napi *tnapi, int budget)
{
+ struct tg3 *tp = tnapi->tp;
u32 work_mask, rx_std_posted = 0;
u32 sw_idx = tp->rx_rcb_ptr;
u16 hw_idx;
@@ -4515,7 +4522,7 @@ static int tg3_rx(struct tg3 *tp, int budget)
if ((desc->err_vlan & RXD_ERR_MASK) != 0 &&
(desc->err_vlan != RXD_ERR_ODD_NIBBLE_RCVD_MII)) {
drop_it:
- tg3_recycle_rx(tp, opaque_key,
+ tg3_recycle_rx(tnapi, opaque_key,
desc_idx, *post_ptr);
drop_it_no_recycle:
/* Other statistics kept track of by card. */
@@ -4535,7 +4542,7 @@ static int tg3_rx(struct tg3 *tp, int budget)
) {
int skb_size;
- skb_size = tg3_alloc_rx_skb(tp, opaque_key,
+ skb_size = tg3_alloc_rx_skb(tnapi, opaque_key,
desc_idx, *post_ptr);
if (skb_size < 0)
goto drop_it;
@@ -4547,7 +4554,7 @@ static int tg3_rx(struct tg3 *tp, int budget)
} else {
struct sk_buff *copy_skb;
- tg3_recycle_rx(tp, opaque_key,
+ tg3_recycle_rx(tnapi, opaque_key,
desc_idx, *post_ptr);
copy_skb = netdev_alloc_skb(tp->dev,
@@ -4584,11 +4591,11 @@ static int tg3_rx(struct tg3 *tp, int budget)
#if TG3_VLAN_TAG_USED
if (tp->vlgrp != NULL &&
desc->type_flags & RXD_FLAG_VLAN) {
- vlan_gro_receive(&tp->napi[0].napi, tp->vlgrp,
+ vlan_gro_receive(&tnapi->napi, tp->vlgrp,
desc->err_vlan & RXD_VLAN_MASK, skb);
} else
#endif
- napi_gro_receive(&tp->napi[0].napi, skb);
+ napi_gro_receive(&tnapi->napi, skb);
received++;
budget--;
@@ -4635,8 +4642,9 @@ next_pkt_nopost:
return received;
}
-static int tg3_poll_work(struct tg3 *tp, int work_done, int budget)
+static int tg3_poll_work(struct tg3_napi *tnapi, int work_done, int budget)
{
+ struct tg3 *tp = tnapi->tp;
struct tg3_hw_status *sblk = tp->hw_status;
/* handle link change and other phy events */
@@ -4662,7 +4670,7 @@ static int tg3_poll_work(struct tg3 *tp, int work_done, int budget)
/* run TX completion thread */
if (sblk->idx[0].tx_consumer != tp->tx_cons) {
- tg3_tx(tp);
+ tg3_tx(tnapi);
if (unlikely(tp->tg3_flags & TG3_FLAG_TX_RECOVERY_PENDING))
return work_done;
}
@@ -4672,7 +4680,7 @@ static int tg3_poll_work(struct tg3 *tp, int work_done, int budget)
* code synchronizes with tg3->napi.poll()
*/
if (sblk->idx[0].rx_producer != tp->rx_rcb_ptr)
- work_done += tg3_rx(tp, budget - work_done);
+ work_done += tg3_rx(tnapi, budget - work_done);
return work_done;
}
@@ -4685,7 +4693,7 @@ static int tg3_poll(struct napi_struct *napi, int budget)
struct tg3_hw_status *sblk = tp->hw_status;
while (1) {
- work_done = tg3_poll_work(tp, work_done, budget);
+ work_done = tg3_poll_work(tnapi, work_done, budget);
if (unlikely(tp->tg3_flags & TG3_FLAG_TX_RECOVERY_PENDING))
goto tx_recovery;
@@ -4694,7 +4702,7 @@ static int tg3_poll(struct napi_struct *napi, int budget)
break;
if (tp->tg3_flags & TG3_FLAG_TAGGED_STATUS) {
- /* tp->last_tag is used in tg3_restart_ints() below
+ /* tp->last_tag is used in tg3_int_reenable() below
* to tell the hw how much work has been processed,
* so we must read it before checking for more work.
*/
@@ -4704,9 +4712,9 @@ static int tg3_poll(struct napi_struct *napi, int budget)
} else
sblk->status &= ~SD_STATUS_UPDATED;
- if (likely(!tg3_has_work(tp))) {
+ if (likely(!tg3_has_work(tnapi))) {
napi_complete(napi);
- tg3_restart_ints(tp);
+ tg3_int_reenable(tnapi);
break;
}
}
@@ -4829,7 +4837,7 @@ static irqreturn_t tg3_interrupt(int irq, void *dev_id)
if (tg3_irq_sync(tp))
goto out;
sblk->status &= ~SD_STATUS_UPDATED;
- if (likely(tg3_has_work(tp))) {
+ if (likely(tg3_has_work(tnapi))) {
prefetch(&tp->rx_rcb[tp->rx_rcb_ptr]);
napi_schedule(&tnapi->napi);
} else {
@@ -5560,6 +5568,7 @@ static int tg3_rx_prodring_alloc(struct tg3 *tp,
struct tg3_rx_prodring_set *tpr)
{
u32 i, rx_pkt_dma_sz;
+ struct tg3_napi *tnapi = &tp->napi[0];
/* Zero out all descriptors. */
memset(tpr->rx_std, 0, TG3_RX_RING_BYTES);
@@ -5586,7 +5595,7 @@ static int tg3_rx_prodring_alloc(struct tg3 *tp,
/* Now allocate fresh SKBs for each rx ring. */
for (i = 0; i < tp->rx_pending; i++) {
- if (tg3_alloc_rx_skb(tp, RXD_OPAQUE_RING_STD, -1, i) < 0) {
+ if (tg3_alloc_rx_skb(tnapi, RXD_OPAQUE_RING_STD, -1, i) < 0) {
printk(KERN_WARNING PFX
"%s: Using a smaller RX standard ring, "
"only %d out of %d buffers were allocated "
@@ -5617,7 +5626,7 @@ static int tg3_rx_prodring_alloc(struct tg3 *tp,
}
for (i = 0; i < tp->rx_jumbo_pending; i++) {
- if (tg3_alloc_rx_skb(tp, RXD_OPAQUE_RING_JUMBO,
+ if (tg3_alloc_rx_skb(tnapi, RXD_OPAQUE_RING_JUMBO,
-1, i) < 0) {
printk(KERN_WARNING PFX
"%s: Using a smaller RX jumbo ring, "
--
1.6.3.3
--
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