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tg3: Add RSS support
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This patch adds code needed to enable RSS.

Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Reviewed-by: Benjamin Li <benli@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Matt Carlson authored and David S. Miller committed Sep 2, 2009
1 parent b6080e1 commit baf8a94
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Showing 2 changed files with 76 additions and 2 deletions.
53 changes: 52 additions & 1 deletion drivers/net/tg3.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -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
Expand Down Expand Up @@ -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);
Expand Down Expand Up @@ -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) {
Expand All @@ -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);

Expand Down Expand Up @@ -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;

Expand Down Expand Up @@ -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:
Expand All @@ -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)
Expand Down
25 changes: 24 additions & 1 deletion drivers/net/tg3.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -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
Expand Down Expand Up @@ -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
Expand Down Expand Up @@ -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 */
Expand Down Expand Up @@ -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;
Expand Down

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