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Date: Tue, 1 Sep 2009 16:13:00 -0700
From: "Matt Carlson" <mcarlson@...adcom.com>
To: davem@...emloft.net
cc: netdev@...r.kernel.org, andy@...yhouse.net
Subject: [PATCH 12/18] tg3: Add RSS support
This patch adds code needed to enable RSS.
Signed-off-by: Matt Carlson <mcarlson@...adcom.com>
Reviewed-by: Benjamin Li <benli@...adcom.com>
---
drivers/net/tg3.c | 53 ++++++++++++++++++++++++++++++++++++++++++++++++++++-
drivers/net/tg3.h | 25 ++++++++++++++++++++++++-
2 files changed, 76 insertions(+), 2 deletions(-)
diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index 8e9492b..39a8ead 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -102,6 +102,7 @@
#define TG3_DEF_RX_RING_PENDING 200
#define TG3_RX_JUMBO_RING_SIZE 256
#define TG3_DEF_RX_JUMBO_RING_PENDING 100
+#define TG3_RSS_INDIR_TBL_SIZE 128
/* Do not place this n-ring entries value into the tp struct itself,
* we really want to expose these constants to GCC so that modulo et
@@ -7497,6 +7498,12 @@ static int tg3_reset_hw(struct tg3 *tp, int reset_phy)
tw32_f(GRC_LOCAL_CTRL, tp->grc_local_ctrl);
udelay(100);
+ if (tp->tg3_flags2 & TG3_FLG2_USING_MSIX) {
+ val = tr32(MSGINT_MODE);
+ val |= MSGINT_MODE_MULTIVEC_EN | MSGINT_MODE_ENABLE;
+ tw32(MSGINT_MODE, val);
+ }
+
if (!(tp->tg3_flags2 & TG3_FLG2_5705_PLUS)) {
tw32_f(DMAC_MODE, DMAC_MODE_ENABLE);
udelay(40);
@@ -7565,7 +7572,10 @@ static int tg3_reset_hw(struct tg3 *tp, int reset_phy)
tw32(SNDDATAI_MODE, SNDDATAI_MODE_ENABLE);
if (tp->tg3_flags2 & TG3_FLG2_HW_TSO)
tw32(SNDDATAI_MODE, SNDDATAI_MODE_ENABLE | 0x8);
- tw32(SNDBDI_MODE, SNDBDI_MODE_ENABLE | SNDBDI_MODE_ATTN_ENABLE);
+ val = SNDBDI_MODE_ENABLE | SNDBDI_MODE_ATTN_ENABLE;
+ if (tp->tg3_flags2 & TG3_FLG2_USING_MSIX)
+ val |= SNDBDI_MODE_MULTI_TXQ_EN;
+ tw32(SNDBDI_MODE, val);
tw32(SNDBDS_MODE, SNDBDS_MODE_ENABLE | SNDBDS_MODE_ATTN_ENABLE);
if (tp->pci_chip_rev_id == CHIPREV_ID_5701_A0) {
@@ -7584,10 +7594,46 @@ static int tg3_reset_hw(struct tg3 *tp, int reset_phy)
tw32_f(MAC_TX_MODE, tp->tx_mode);
udelay(100);
+ if (tp->tg3_flags3 & TG3_FLG3_ENABLE_RSS) {
+ u32 reg = MAC_RSS_INDIR_TBL_0;
+ u8 *ent = (u8 *)&val;
+
+ /* Setup the indirection table */
+ for (i = 0; i < TG3_RSS_INDIR_TBL_SIZE; i++) {
+ int idx = i % sizeof(val);
+
+ ent[idx] = i % (tp->irq_cnt - 1);
+ if (idx == sizeof(val) - 1) {
+ tw32(reg, val);
+ reg += 4;
+ }
+ }
+
+ /* Setup the "secret" hash key. */
+ tw32(MAC_RSS_HASH_KEY_0, 0x5f865437);
+ tw32(MAC_RSS_HASH_KEY_1, 0xe4ac62cc);
+ tw32(MAC_RSS_HASH_KEY_2, 0x50103a45);
+ tw32(MAC_RSS_HASH_KEY_3, 0x36621985);
+ tw32(MAC_RSS_HASH_KEY_4, 0xbf14c0e8);
+ tw32(MAC_RSS_HASH_KEY_5, 0x1bc27a1e);
+ tw32(MAC_RSS_HASH_KEY_6, 0x84f4b556);
+ tw32(MAC_RSS_HASH_KEY_7, 0x094ea6fe);
+ tw32(MAC_RSS_HASH_KEY_8, 0x7dda01e7);
+ tw32(MAC_RSS_HASH_KEY_9, 0xc04d7481);
+ }
+
tp->rx_mode = RX_MODE_ENABLE;
if (tp->tg3_flags3 & TG3_FLG3_5755_PLUS)
tp->rx_mode |= RX_MODE_IPV6_CSUM_ENABLE;
+ if (tp->tg3_flags3 & TG3_FLG3_ENABLE_RSS)
+ tp->rx_mode |= RX_MODE_RSS_ENABLE |
+ RX_MODE_RSS_ITBL_HASH_BITS_7 |
+ RX_MODE_RSS_IPV6_HASH_EN |
+ RX_MODE_RSS_TCP_IPV6_HASH_EN |
+ RX_MODE_RSS_IPV4_HASH_EN |
+ RX_MODE_RSS_TCP_IPV4_HASH_EN;
+
tw32_f(MAC_RX_MODE, tp->rx_mode);
udelay(10);
@@ -8112,6 +8158,8 @@ static bool tg3_enable_msix(struct tg3 *tp)
tp->irq_cnt = rc;
}
+ tp->tg3_flags3 |= TG3_FLG3_ENABLE_RSS;
+
for (i = 0; i < tp->irq_max; i++)
tp->napi[i].irq_vec = msix_ent[i].vector;
@@ -8140,6 +8188,8 @@ static void tg3_ints_init(struct tg3 *tp)
if (tp->tg3_flags2 & TG3_FLG2_USING_MSI_OR_MSIX) {
u32 msi_mode = tr32(MSGINT_MODE);
+ if (tp->tg3_flags2 & TG3_FLG2_USING_MSIX)
+ msi_mode |= MSGINT_MODE_MULTIVEC_EN;
tw32(MSGINT_MODE, msi_mode | MSGINT_MODE_ENABLE);
}
defcfg:
@@ -8157,6 +8207,7 @@ static void tg3_ints_fini(struct tg3 *tp)
else if (tp->tg3_flags2 & TG3_FLG2_USING_MSI)
pci_disable_msi(tp->pdev);
tp->tg3_flags2 &= ~TG3_FLG2_USING_MSI_OR_MSIX;
+ tp->tg3_flags3 &= ~TG3_FLG3_ENABLE_RSS;
}
static int tg3_open(struct net_device *dev)
diff --git a/drivers/net/tg3.h b/drivers/net/tg3.h
index 978b6d9..348add2 100644
--- a/drivers/net/tg3.h
+++ b/drivers/net/tg3.h
@@ -446,6 +446,12 @@
#define RX_MODE_PROMISC 0x00000100
#define RX_MODE_NO_CRC_CHECK 0x00000200
#define RX_MODE_KEEP_VLAN_TAG 0x00000400
+#define RX_MODE_RSS_IPV4_HASH_EN 0x00010000
+#define RX_MODE_RSS_TCP_IPV4_HASH_EN 0x00020000
+#define RX_MODE_RSS_IPV6_HASH_EN 0x00040000
+#define RX_MODE_RSS_TCP_IPV6_HASH_EN 0x00080000
+#define RX_MODE_RSS_ITBL_HASH_BITS_7 0x00700000
+#define RX_MODE_RSS_ENABLE 0x00800000
#define RX_MODE_IPV6_CSUM_ENABLE 0x01000000
#define MAC_RX_STATUS 0x0000046c
#define RX_STATUS_REMOTE_TX_XOFFED 0x00000001
@@ -690,7 +696,22 @@
/* 0x5b8 --> 0x600 unused */
#define MAC_TX_MAC_STATE_BASE 0x00000600 /* 16 bytes */
#define MAC_RX_MAC_STATE_BASE 0x00000610 /* 20 bytes */
-/* 0x624 --> 0x800 unused */
+/* 0x624 --> 0x670 unused */
+
+#define MAC_RSS_INDIR_TBL_0 0x00000630
+
+#define MAC_RSS_HASH_KEY_0 0x00000670
+#define MAC_RSS_HASH_KEY_1 0x00000674
+#define MAC_RSS_HASH_KEY_2 0x00000678
+#define MAC_RSS_HASH_KEY_3 0x0000067c
+#define MAC_RSS_HASH_KEY_4 0x00000680
+#define MAC_RSS_HASH_KEY_5 0x00000684
+#define MAC_RSS_HASH_KEY_6 0x00000688
+#define MAC_RSS_HASH_KEY_7 0x0000068c
+#define MAC_RSS_HASH_KEY_8 0x00000690
+#define MAC_RSS_HASH_KEY_9 0x00000694
+/* 0x698 --> 0x800 unused */
+
#define MAC_TX_STATS_OCTETS 0x00000800
#define MAC_TX_STATS_RESV1 0x00000804
#define MAC_TX_STATS_COLLISIONS 0x00000808
@@ -1465,6 +1486,7 @@
#define MSGINT_MODE 0x00006000
#define MSGINT_MODE_RESET 0x00000001
#define MSGINT_MODE_ENABLE 0x00000002
+#define MSGINT_MODE_MULTIVEC_EN 0x00000080
#define MSGINT_STATUS 0x00006004
#define MSGINT_FIFO 0x00006008
/* 0x600c --> 0x6400 unused */
@@ -2704,6 +2726,7 @@ struct tg3 {
#define TG3_FLG3_NO_NVRAM 0x00004000
#define TG3_FLG3_TOGGLE_10_100_L1PLLPD 0x00008000
#define TG3_FLG3_PHY_IS_FET 0x00010000
+#define TG3_FLG3_ENABLE_RSS 0x00020000
struct timer_list timer;
u16 timer_counter;
--
1.6.3.3
--
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