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authorEilon Greenstein <eilong@broadcom.com>2009-02-12 08:36:43 +0000
committerDavid S. Miller <davem@davemloft.net>2009-02-15 23:31:15 -0800
commit1c06328c0345638ea7532b45cadfe713c9e9781e (patch)
treef0bc6c0986f22802655b347367ff5222074870dc /drivers/net/bnx2x_main.c
parent8a1c38d17d88c8df3dcbea1c01a390ab2087f8ad (diff)
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bnx2x: Flow control enhancement
Setting better HW thresholds and enabling FW capabilities for better enforcement. Also set the HW to more efficiently use the internal buffers if this is a single port design Signed-off-by: Eilon Greenstein <eilong@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/bnx2x_main.c')
-rw-r--r--drivers/net/bnx2x_main.c96
1 files changed, 87 insertions, 9 deletions
diff --git a/drivers/net/bnx2x_main.c b/drivers/net/bnx2x_main.c
index ce55e84..77793bb 100644
--- a/drivers/net/bnx2x_main.c
+++ b/drivers/net/bnx2x_main.c
@@ -2165,6 +2165,19 @@ static void bnx2x_link_attn(struct bnx2x *bp)
if (bp->link_vars.link_up) {
+ /* dropless flow control */
+ if (CHIP_IS_E1H(bp)) {
+ int port = BP_PORT(bp);
+ u32 pause_enabled = 0;
+
+ if (bp->link_vars.flow_ctrl & BNX2X_FLOW_CTRL_TX)
+ pause_enabled = 1;
+
+ REG_WR(bp, BAR_USTRORM_INTMEM +
+ USTORM_PAUSE_ENABLED_OFFSET(port),
+ pause_enabled);
+ }
+
if (bp->link_vars.mac_type == MAC_TYPE_BMAC) {
struct host_port_stats *pstats;
@@ -4909,6 +4922,38 @@ static void bnx2x_init_internal_func(struct bnx2x *bp)
max_agg_size);
}
+ /* dropless flow control */
+ if (CHIP_IS_E1H(bp)) {
+ struct ustorm_eth_rx_pause_data_e1h rx_pause = {0};
+
+ rx_pause.bd_thr_low = 250;
+ rx_pause.cqe_thr_low = 250;
+ rx_pause.cos = 1;
+ rx_pause.sge_thr_low = 0;
+ rx_pause.bd_thr_high = 350;
+ rx_pause.cqe_thr_high = 350;
+ rx_pause.sge_thr_high = 0;
+
+ for_each_rx_queue(bp, i) {
+ struct bnx2x_fastpath *fp = &bp->fp[i];
+
+ if (!fp->disable_tpa) {
+ rx_pause.sge_thr_low = 150;
+ rx_pause.sge_thr_high = 250;
+ }
+
+
+ offset = BAR_USTRORM_INTMEM +
+ USTORM_ETH_RING_PAUSE_DATA_OFFSET(port,
+ fp->cl_id);
+ for (j = 0;
+ j < sizeof(struct ustorm_eth_rx_pause_data_e1h)/4;
+ j++)
+ REG_WR(bp, offset + j*4,
+ ((u32 *)&rx_pause)[j]);
+ }
+ }
+
memset(&(bp->cmng), 0, sizeof(struct cmng_struct_per_port));
/* Init rate shaping and fairness contexts */
@@ -5437,14 +5482,6 @@ static int bnx2x_init_common(struct bnx2x *bp)
}
bnx2x_init_block(bp, BRB1_COMMON_START, BRB1_COMMON_END);
- if (CHIP_REV_IS_SLOW(bp)) {
- /* fix for emulation and FPGA for no pause */
- REG_WR(bp, BRB1_REG_PAUSE_HIGH_THRESHOLD_0, 513);
- REG_WR(bp, BRB1_REG_PAUSE_HIGH_THRESHOLD_1, 513);
- REG_WR(bp, BRB1_REG_PAUSE_LOW_THRESHOLD_0, 0);
- REG_WR(bp, BRB1_REG_PAUSE_LOW_THRESHOLD_1, 0);
- }
-
bnx2x_init_block(bp, PRS_COMMON_START, PRS_COMMON_END);
REG_WR(bp, PRS_REG_A_PRSU_20, 0xf);
/* set NIC mode */
@@ -5626,6 +5663,7 @@ static int bnx2x_init_common(struct bnx2x *bp)
static int bnx2x_init_port(struct bnx2x *bp)
{
int port = BP_PORT(bp);
+ u32 low, high;
u32 val;
DP(BNX2X_MSG_MCP, "starting port init port %x\n", port);
@@ -5672,7 +5710,32 @@ static int bnx2x_init_port(struct bnx2x *bp)
func ? TIMERS_PORT1_END : TIMERS_PORT0_END);
#endif
/* Port DQ comes here */
- /* Port BRB1 comes here */
+
+ bnx2x_init_block(bp, (port ? BRB1_PORT1_START : BRB1_PORT0_START),
+ (port ? BRB1_PORT1_END : BRB1_PORT0_END));
+ if (CHIP_REV_IS_SLOW(bp) && !CHIP_IS_E1H(bp)) {
+ /* no pause for emulation and FPGA */
+ low = 0;
+ high = 513;
+ } else {
+ if (IS_E1HMF(bp))
+ low = ((bp->flags & ONE_PORT_FLAG) ? 160 : 246);
+ else if (bp->dev->mtu > 4096) {
+ if (bp->flags & ONE_PORT_FLAG)
+ low = 160;
+ else {
+ val = bp->dev->mtu;
+ /* (24*1024 + val*4)/256 */
+ low = 96 + (val/64) + ((val % 64) ? 1 : 0);
+ }
+ } else
+ low = ((bp->flags & ONE_PORT_FLAG) ? 80 : 160);
+ high = low + 56; /* 14*1024/256 */
+ }
+ REG_WR(bp, BRB1_REG_PAUSE_LOW_THRESHOLD_0 + port*4, low);
+ REG_WR(bp, BRB1_REG_PAUSE_HIGH_THRESHOLD_0 + port*4, high);
+
+
/* Port PRS comes here */
/* Port TSDM comes here */
/* Port CSDM comes here */
@@ -5754,6 +5817,14 @@ static int bnx2x_init_port(struct bnx2x *bp)
REG_WR(bp, NIG_REG_LLH0_BRB1_DRV_MASK_MF + port*4,
(IS_E1HMF(bp) ? 0x1 : 0x2));
+ /* support pause requests from USDM, TSDM and BRB */
+ REG_WR(bp, NIG_REG_LLFC_EGRESS_SRC_ENABLE_0 + port*4, 0x7);
+
+ {
+ REG_WR(bp, NIG_REG_LLFC_ENABLE_0 + port*4, 0);
+ REG_WR(bp, NIG_REG_LLFC_OUT_EN_0 + port*4, 0);
+ REG_WR(bp, NIG_REG_PAUSE_ENABLE_0 + port*4, 1);
+ }
}
/* Port MCP comes here */
@@ -7331,6 +7402,13 @@ static void __devinit bnx2x_get_common_hwinfo(struct bnx2x *bp)
bp->link_params.chip_id = bp->common.chip_id;
BNX2X_DEV_INFO("chip ID is 0x%x\n", id);
+ val = (REG_RD(bp, 0x2874) & 0x55);
+ if ((bp->common.chip_id & 0x1) ||
+ (CHIP_IS_E1(bp) && val) || (CHIP_IS_E1H(bp) && (val == 0x55))) {
+ bp->flags |= ONE_PORT_FLAG;
+ BNX2X_DEV_INFO("single port device\n");
+ }
+
val = REG_RD(bp, MCP_REG_MCPR_NVM_CFG4);
bp->common.flash_size = (NVRAM_1MB_SIZE <<
(val & MCPR_NVM_CFG4_FLASH_SIZE));