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Date: Thu, 12 Feb 2009 20:36:43 +0200
From: "Eilon Greenstein" <eilong@...adcom.com>
To: "David Miller" <davem@...emloft.net>
cc: "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: [PATCH 10/41]bnx2x: Flow control enhancement
Subject: [PATCH 10/41]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@...adcom.com>
---
drivers/net/bnx2x.h | 2 +-
drivers/net/bnx2x_fw_defs.h | 5 ++
drivers/net/bnx2x_hsi.h | 35 ++++++++++++++++
drivers/net/bnx2x_main.c | 96 +++++++++++++++++++++++++++++++++++++++----
drivers/net/bnx2x_reg.h | 29 +++++++++++++
5 files changed, 157 insertions(+), 10 deletions(-)
diff --git a/drivers/net/bnx2x.h b/drivers/net/bnx2x.h
index b40d4f1..8c2124e 100644
--- a/drivers/net/bnx2x.h
+++ b/drivers/net/bnx2x.h
@@ -846,7 +846,7 @@ struct bnx2x {
u32 flags;
#define PCIX_FLAG 1
#define PCI_32BIT_FLAG 2
-#define ONE_TDMA_FLAG 4 /* no longer used */
+#define ONE_PORT_FLAG 4
#define NO_WOL_FLAG 8
#define USING_DAC_FLAG 0x10
#define USING_MSIX_FLAG 0x20
diff --git a/drivers/net/bnx2x_fw_defs.h b/drivers/net/bnx2x_fw_defs.h
index 59bb132..f6dacb0 100644
--- a/drivers/net/bnx2x_fw_defs.h
+++ b/drivers/net/bnx2x_fw_defs.h
@@ -107,6 +107,9 @@
#define USTORM_DEF_SB_HOST_STATUS_BLOCK_OFFSET(function) \
(IS_E1H_OFFSET ? (0x9508 + ((function>>1) * 0x40) + \
((function&1) * 0x100)) : (0x1908 + (function * 0x40)))
+#define USTORM_ETH_RING_PAUSE_DATA_OFFSET(port, clientId) \
+ (IS_E1H_OFFSET ? (0x8020 + (port * 0x4b0) + (clientId * 0x30)) : \
+ 0xffffffff)
#define USTORM_ETH_STATS_QUERY_ADDR_OFFSET(function) \
(IS_E1H_OFFSET ? (0x2a50 + (function * 0x8)) : (0x1d98 + \
(function * 0x8)))
@@ -120,6 +123,8 @@
#define USTORM_MEM_WORKAROUND_ADDRESS_OFFSET(function) \
(IS_E1H_OFFSET ? (0x2408 + (function * 0x8)) : (0x5308 + \
(function * 0x8)))
+#define USTORM_PAUSE_ENABLED_OFFSET(port) \
+ (IS_E1H_OFFSET ? (0x2ad4 + (port * 0x8)) : 0xffffffff)
#define USTORM_PER_COUNTER_ID_STATS_OFFSET(port, stats_counter_id) \
(IS_E1H_OFFSET ? (0x2450 + (port * 0x2d0) + (stats_counter_id * \
0x28)) : (0x4740 + (port * 0x2d0) + (stats_counter_id * 0x28)))
diff --git a/drivers/net/bnx2x_hsi.h b/drivers/net/bnx2x_hsi.h
index a4a6039..b0f41d1 100644
--- a/drivers/net/bnx2x_hsi.h
+++ b/drivers/net/bnx2x_hsi.h
@@ -2615,6 +2615,41 @@ struct tstorm_eth_tpa_exist {
/*
+ * rx rings pause data for E1h only
+ */
+struct ustorm_eth_rx_pause_data_e1h {
+#if defined(__BIG_ENDIAN)
+ u16 bd_thr_low;
+ u16 cqe_thr_low;
+#elif defined(__LITTLE_ENDIAN)
+ u16 cqe_thr_low;
+ u16 bd_thr_low;
+#endif
+#if defined(__BIG_ENDIAN)
+ u16 cos;
+ u16 sge_thr_low;
+#elif defined(__LITTLE_ENDIAN)
+ u16 sge_thr_low;
+ u16 cos;
+#endif
+#if defined(__BIG_ENDIAN)
+ u16 bd_thr_high;
+ u16 cqe_thr_high;
+#elif defined(__LITTLE_ENDIAN)
+ u16 cqe_thr_high;
+ u16 bd_thr_high;
+#endif
+#if defined(__BIG_ENDIAN)
+ u16 reserved0;
+ u16 sge_thr_high;
+#elif defined(__LITTLE_ENDIAN)
+ u16 sge_thr_high;
+ u16 reserved0;
+#endif
+};
+
+
+/*
* Three RX producers for ETH
*/
struct ustorm_eth_rx_producers {
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));
diff --git a/drivers/net/bnx2x_reg.h b/drivers/net/bnx2x_reg.h
index b654d5d..713b5f9 100644
--- a/drivers/net/bnx2x_reg.h
+++ b/drivers/net/bnx2x_reg.h
@@ -30,8 +30,20 @@
address BRB1_IND_FREE_LIST_PRS_CRDT+1 initialize free tail. At address
BRB1_IND_FREE_LIST_PRS_CRDT+2 initialize parser initial credit. */
#define BRB1_REG_FREE_LIST_PRS_CRDT 0x60200
+/* [RW 10] The number of free blocks above which the High_llfc signal to
+ interface #n is de-asserted. */
+#define BRB1_REG_HIGH_LLFC_HIGH_THRESHOLD_0 0x6014c
+/* [RW 10] The number of free blocks below which the High_llfc signal to
+ interface #n is asserted. */
+#define BRB1_REG_HIGH_LLFC_LOW_THRESHOLD_0 0x6013c
/* [RW 23] LL RAM data. */
#define BRB1_REG_LL_RAM 0x61000
+/* [RW 10] The number of free blocks above which the Low_llfc signal to
+ interface #n is de-asserted. */
+#define BRB1_REG_LOW_LLFC_HIGH_THRESHOLD_0 0x6016c
+/* [RW 10] The number of free blocks below which the Low_llfc signal to
+ interface #n is asserted. */
+#define BRB1_REG_LOW_LLFC_LOW_THRESHOLD_0 0x6015c
/* [R 24] The number of full blocks. */
#define BRB1_REG_NUM_OF_FULL_BLOCKS 0x60090
/* [ST 32] The number of cycles that the write_full signal towards MAC #0
@@ -1684,6 +1696,19 @@
/* [RW 4] led mode for port0: 0 MAC; 1-3 PHY1; 4 MAC2; 5-7 PHY4; 8-MAC3;
9-11PHY7; 12 MAC4; 13-15 PHY10; */
#define NIG_REG_LED_MODE_P0 0x102f0
+/* [RW 3] for port0 enable for llfc ppp and pause. b0 - brb1 enable; b1-
+ tsdm enable; b2- usdm enable */
+#define NIG_REG_LLFC_EGRESS_SRC_ENABLE_0 0x16070
+/* [RW 1] SAFC enable for port0. This register may get 1 only when
+ ~ppp_enable.ppp_enable = 0 and pause_enable.pause_enable =0 for the same
+ port */
+#define NIG_REG_LLFC_ENABLE_0 0x16208
+/* [RW 16] classes are high-priority for port0 */
+#define NIG_REG_LLFC_HIGH_PRIORITY_CLASSES_0 0x16058
+/* [RW 16] classes are low-priority for port0 */
+#define NIG_REG_LLFC_LOW_PRIORITY_CLASSES_0 0x16060
+/* [RW 1] Output enable of message to LLFC BMAC IF for port0 */
+#define NIG_REG_LLFC_OUT_EN_0 0x160c8
#define NIG_REG_LLH0_ACPI_PAT_0_CRC 0x1015c
#define NIG_REG_LLH0_ACPI_PAT_6_LEN 0x10154
#define NIG_REG_LLH0_BRB1_DRV_MASK 0x10244
@@ -1754,6 +1779,10 @@
#define NIG_REG_NIG_INT_STS_1 0x103c0
/* [R 32] Parity register #0 read */
#define NIG_REG_NIG_PRTY_STS 0x103d0
+/* [RW 1] Pause enable for port0. This register may get 1 only when
+ ~safc_enable.safc_enable = 0 and ppp_enable.ppp_enable =0 for the same
+ port */
+#define NIG_REG_PAUSE_ENABLE_0 0x160c0
/* [RW 1] Input enable for RX PBF LP IF */
#define NIG_REG_PBF_LB_IN_EN 0x100b4
/* [RW 1] Value of this register will be transmitted to port swap when
--
1.5.4.3
--
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