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Date: Fri, 13 Nov 2009 15:03:50 -0800
From: "Matt Carlson" <mcarlson@...adcom.com>
To: davem@...emloft.net
cc: netdev@...r.kernel.org, andy@...yhouse.net,
"Matt Carlson" <mcarlson@...adcom.com>,
"Michael Chan" <mchan@...adcom.com>
Subject: [PATCH 18/20] tg3: Add rx prod ring consolidation
This patch adds code to funnel each MSI-X vector's rx packet buffers
into a single set of producer rings which will then be submitted to the
hardware.
Signed-off-by: Matt Carlson <mcarlson@...adcom.com>
Signed-off-by: Michael Chan <mchan@...adcom.com>
---
drivers/net/tg3.c | 171 +++++++++++++++++++++++++++++++++++++++++++++++++---
drivers/net/tg3.h | 3 +
2 files changed, 164 insertions(+), 10 deletions(-)
diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index 05fd42f..3ff2d40 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -4558,7 +4558,7 @@ static int tg3_rx(struct tg3_napi *tnapi, int budget)
u32 sw_idx = tnapi->rx_rcb_ptr;
u16 hw_idx;
int received;
- struct tg3_rx_prodring_set *tpr = &tp->prodring[0];
+ struct tg3_rx_prodring_set *tpr = tnapi->prodring;
hw_idx = *(tnapi->rx_rcb_prod_idx);
/*
@@ -4581,13 +4581,13 @@ static int tg3_rx(struct tg3_napi *tnapi, int budget)
desc_idx = desc->opaque & RXD_OPAQUE_INDEX_MASK;
opaque_key = desc->opaque & RXD_OPAQUE_RING_MASK;
if (opaque_key == RXD_OPAQUE_RING_STD) {
- ri = &tpr->rx_std_buffers[desc_idx];
+ ri = &tp->prodring[0].rx_std_buffers[desc_idx];
dma_addr = pci_unmap_addr(ri, mapping);
skb = ri->skb;
post_ptr = &std_prod_idx;
rx_std_posted++;
} else if (opaque_key == RXD_OPAQUE_RING_JUMBO) {
- ri = &tpr->rx_jmb_buffers[desc_idx];
+ ri = &tp->prodring[0].rx_jmb_buffers[desc_idx];
dma_addr = pci_unmap_addr(ri, mapping);
skb = ri->skb;
post_ptr = &jmb_prod_idx;
@@ -4704,15 +4704,30 @@ next_pkt_nopost:
tw32_rx_mbox(tnapi->consmbox, sw_idx);
/* Refill RX ring(s). */
- if (work_mask & RXD_OPAQUE_RING_STD) {
+ if (!(tp->tg3_flags3 & TG3_FLG3_ENABLE_RSS) || tnapi == &tp->napi[1]) {
+ if (work_mask & RXD_OPAQUE_RING_STD) {
+ tpr->rx_std_prod_idx = std_prod_idx % TG3_RX_RING_SIZE;
+ tw32_rx_mbox(TG3_RX_STD_PROD_IDX_REG,
+ tpr->rx_std_prod_idx);
+ }
+ if (work_mask & RXD_OPAQUE_RING_JUMBO) {
+ tpr->rx_jmb_prod_idx = jmb_prod_idx %
+ TG3_RX_JUMBO_RING_SIZE;
+ tw32_rx_mbox(TG3_RX_JMB_PROD_IDX_REG,
+ tpr->rx_jmb_prod_idx);
+ }
+ mmiowb();
+ } else if (work_mask) {
+ /* rx_std_buffers[] and rx_jmb_buffers[] entries must be
+ * updated before the producer indices can be updated.
+ */
+ smp_wmb();
+
tpr->rx_std_prod_idx = std_prod_idx % TG3_RX_RING_SIZE;
- tw32_rx_mbox(TG3_RX_STD_PROD_IDX_REG, tpr->rx_std_prod_idx);
- }
- if (work_mask & RXD_OPAQUE_RING_JUMBO) {
tpr->rx_jmb_prod_idx = jmb_prod_idx % TG3_RX_JUMBO_RING_SIZE;
- tw32_rx_mbox(TG3_RX_JMB_PROD_IDX_REG, tpr->rx_jmb_prod_idx);
+
+ napi_schedule(&tp->napi[1].napi);
}
- mmiowb();
return received;
}
@@ -4743,6 +4758,93 @@ static void tg3_poll_link(struct tg3 *tp)
}
}
+static void tg3_rx_prodring_xfer(struct tg3 *tp,
+ struct tg3_rx_prodring_set *dpr,
+ struct tg3_rx_prodring_set *spr)
+{
+ u32 si, di, cpycnt, src_prod_idx;
+ int i;
+
+ while (1) {
+ src_prod_idx = spr->rx_std_prod_idx;
+
+ /* Make sure updates to the rx_std_buffers[] entries and the
+ * standard producer index are seen in the correct order.
+ */
+ smp_rmb();
+
+ if (spr->rx_std_cons_idx == src_prod_idx)
+ break;
+
+ if (spr->rx_std_cons_idx < src_prod_idx)
+ cpycnt = src_prod_idx - spr->rx_std_cons_idx;
+ else
+ cpycnt = TG3_RX_RING_SIZE - spr->rx_std_cons_idx;
+
+ cpycnt = min(cpycnt, TG3_RX_RING_SIZE - dpr->rx_std_prod_idx);
+
+ si = spr->rx_std_cons_idx;
+ di = dpr->rx_std_prod_idx;
+
+ memcpy(&dpr->rx_std_buffers[di],
+ &spr->rx_std_buffers[si],
+ cpycnt * sizeof(struct ring_info));
+
+ for (i = 0; i < cpycnt; i++, di++, si++) {
+ struct tg3_rx_buffer_desc *sbd, *dbd;
+ sbd = &spr->rx_std[si];
+ dbd = &dpr->rx_std[di];
+ dbd->addr_hi = sbd->addr_hi;
+ dbd->addr_lo = sbd->addr_lo;
+ }
+
+ spr->rx_std_cons_idx = (spr->rx_std_cons_idx + cpycnt) %
+ TG3_RX_RING_SIZE;
+ dpr->rx_std_prod_idx = (dpr->rx_std_prod_idx + cpycnt) %
+ TG3_RX_RING_SIZE;
+ }
+
+ while (1) {
+ src_prod_idx = spr->rx_jmb_prod_idx;
+
+ /* Make sure updates to the rx_jmb_buffers[] entries and
+ * the jumbo producer index are seen in the correct order.
+ */
+ smp_rmb();
+
+ if (spr->rx_jmb_cons_idx == src_prod_idx)
+ break;
+
+ if (spr->rx_jmb_cons_idx < src_prod_idx)
+ cpycnt = src_prod_idx - spr->rx_jmb_cons_idx;
+ else
+ cpycnt = TG3_RX_JUMBO_RING_SIZE - spr->rx_jmb_cons_idx;
+
+ cpycnt = min(cpycnt,
+ TG3_RX_JUMBO_RING_SIZE - dpr->rx_jmb_prod_idx);
+
+ si = spr->rx_jmb_cons_idx;
+ di = dpr->rx_jmb_prod_idx;
+
+ memcpy(&dpr->rx_jmb_buffers[di],
+ &spr->rx_jmb_buffers[si],
+ cpycnt * sizeof(struct ring_info));
+
+ for (i = 0; i < cpycnt; i++, di++, si++) {
+ struct tg3_rx_buffer_desc *sbd, *dbd;
+ sbd = &spr->rx_jmb[si].std;
+ dbd = &dpr->rx_jmb[di].std;
+ dbd->addr_hi = sbd->addr_hi;
+ dbd->addr_lo = sbd->addr_lo;
+ }
+
+ spr->rx_jmb_cons_idx = (spr->rx_jmb_cons_idx + cpycnt) %
+ TG3_RX_JUMBO_RING_SIZE;
+ dpr->rx_jmb_prod_idx = (dpr->rx_jmb_prod_idx + cpycnt) %
+ TG3_RX_JUMBO_RING_SIZE;
+ }
+}
+
static int tg3_poll_work(struct tg3_napi *tnapi, int work_done, int budget)
{
struct tg3 *tp = tnapi->tp;
@@ -4761,6 +4863,30 @@ static int tg3_poll_work(struct tg3_napi *tnapi, int work_done, int budget)
if (*(tnapi->rx_rcb_prod_idx) != tnapi->rx_rcb_ptr)
work_done += tg3_rx(tnapi, budget - work_done);
+ if ((tp->tg3_flags3 & TG3_FLG3_ENABLE_RSS) && tnapi == &tp->napi[1]) {
+ int i;
+ u32 std_prod_idx = tp->prodring[0].rx_std_prod_idx;
+ u32 jmb_prod_idx = tp->prodring[0].rx_jmb_prod_idx;
+
+ for (i = 2; i < tp->irq_cnt; i++)
+ tg3_rx_prodring_xfer(tp, tnapi->prodring,
+ tp->napi[i].prodring);
+
+ wmb();
+
+ if (std_prod_idx != tp->prodring[0].rx_std_prod_idx) {
+ u32 mbox = TG3_RX_STD_PROD_IDX_REG;
+ tw32_rx_mbox(mbox, tp->prodring[0].rx_std_prod_idx);
+ }
+
+ if (jmb_prod_idx != tp->prodring[0].rx_jmb_prod_idx) {
+ u32 mbox = TG3_RX_JMB_PROD_IDX_REG;
+ tw32_rx_mbox(mbox, tp->prodring[0].rx_jmb_prod_idx);
+ }
+
+ mmiowb();
+ }
+
return work_done;
}
@@ -5715,8 +5841,23 @@ static void tg3_rx_prodring_free(struct tg3 *tp,
{
int i;
- if (tpr != &tp->prodring[0])
+ if (tpr != &tp->prodring[0]) {
+ for (i = tpr->rx_std_cons_idx; i != tpr->rx_std_prod_idx;
+ i = (i + 1) % TG3_RX_RING_SIZE)
+ tg3_rx_skb_free(tp, &tpr->rx_std_buffers[i],
+ tp->rx_pkt_map_sz);
+
+ if (tp->tg3_flags & TG3_FLAG_JUMBO_CAPABLE) {
+ for (i = tpr->rx_jmb_cons_idx;
+ i != tpr->rx_jmb_prod_idx;
+ i = (i + 1) % TG3_RX_JUMBO_RING_SIZE) {
+ tg3_rx_skb_free(tp, &tpr->rx_jmb_buffers[i],
+ TG3_RX_JMB_MAP_SZ);
+ }
+ }
+
return;
+ }
for (i = 0; i < TG3_RX_RING_SIZE; i++)
tg3_rx_skb_free(tp, &tpr->rx_std_buffers[i],
@@ -5741,6 +5882,11 @@ static int tg3_rx_prodring_alloc(struct tg3 *tp,
{
u32 i, rx_pkt_dma_sz;
+ tpr->rx_std_cons_idx = 0;
+ tpr->rx_std_prod_idx = 0;
+ tpr->rx_jmb_cons_idx = 0;
+ tpr->rx_jmb_prod_idx = 0;
+
if (tpr != &tp->prodring[0]) {
memset(&tpr->rx_std_buffers[0], 0, TG3_RX_STD_BUFF_RING_SIZE);
if (tp->tg3_flags & TG3_FLAG_JUMBO_CAPABLE)
@@ -6062,6 +6208,11 @@ static int tg3_alloc_consistent(struct tg3 *tp)
break;
}
+ if (tp->irq_cnt == 1)
+ tnapi->prodring = &tp->prodring[0];
+ else if (i)
+ tnapi->prodring = &tp->prodring[i - 1];
+
/*
* If multivector RSS is enabled, vector 0 does not handle
* rx or tx interrupts. Don't allocate any resources for it.
diff --git a/drivers/net/tg3.h b/drivers/net/tg3.h
index bbfbc5e..6be46ab 100644
--- a/drivers/net/tg3.h
+++ b/drivers/net/tg3.h
@@ -2575,7 +2575,9 @@ struct tg3_ethtool_stats {
struct tg3_rx_prodring_set {
u32 rx_std_prod_idx;
+ u32 rx_std_cons_idx;
u32 rx_jmb_prod_idx;
+ u32 rx_jmb_cons_idx;
struct tg3_rx_buffer_desc *rx_std;
struct tg3_ext_rx_buffer_desc *rx_jmb;
struct ring_info *rx_std_buffers;
@@ -2603,6 +2605,7 @@ struct tg3_napi {
u32 consmbox;
u32 rx_rcb_ptr;
u16 *rx_rcb_prod_idx;
+ struct tg3_rx_prodring_set *prodring;
struct tg3_rx_buffer_desc *rx_rcb;
struct tg3_tx_buffer_desc *tx_ring;
--
1.6.4.4
--
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