tg3: Improve internal resource allocations
The 5717 and the 57765 have more resources at their disposal internally.
This patch tunes the driver to get better performance. The adjustments
made here only apply to the 57765 and 5717 asic revs.
Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Reviewed-by: Michael Chan <mchan@broadcom.com>
Reviewed-by: Benjamin Li <benli@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index b80e7ee..adb579f 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -8152,7 +8152,11 @@
/* Prevent chip from dropping frames when flow control
* is enabled.
*/
- tw32_f(MAC_LOW_WMARK_MAX_RX_FRAME, 2);
+ if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_57765)
+ val = 1;
+ else
+ val = 2;
+ tw32_f(MAC_LOW_WMARK_MAX_RX_FRAME, val);
if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5704 &&
(tp->tg3_flags2 & TG3_FLG2_PHY_SERDES)) {
@@ -14091,9 +14095,22 @@
static void __devinit tg3_init_bufmgr_config(struct tg3 *tp)
{
- if (tp->tg3_flags2 & TG3_FLG2_5705_PLUS &&
- GET_ASIC_REV(tp->pci_chip_rev_id) != ASIC_REV_5717 &&
- GET_ASIC_REV(tp->pci_chip_rev_id) != ASIC_REV_57765) {
+ if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5717 ||
+ GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_57765) {
+ tp->bufmgr_config.mbuf_read_dma_low_water =
+ DEFAULT_MB_RDMA_LOW_WATER_5705;
+ tp->bufmgr_config.mbuf_mac_rx_low_water =
+ DEFAULT_MB_MACRX_LOW_WATER_57765;
+ tp->bufmgr_config.mbuf_high_water =
+ DEFAULT_MB_HIGH_WATER_57765;
+
+ tp->bufmgr_config.mbuf_read_dma_low_water_jumbo =
+ DEFAULT_MB_RDMA_LOW_WATER_5705;
+ tp->bufmgr_config.mbuf_mac_rx_low_water_jumbo =
+ DEFAULT_MB_MACRX_LOW_WATER_JUMBO_57765;
+ tp->bufmgr_config.mbuf_high_water_jumbo =
+ DEFAULT_MB_HIGH_WATER_JUMBO_57765;
+ } else if (tp->tg3_flags2 & TG3_FLG2_5705_PLUS) {
tp->bufmgr_config.mbuf_read_dma_low_water =
DEFAULT_MB_RDMA_LOW_WATER_5705;
tp->bufmgr_config.mbuf_mac_rx_low_water =
diff --git a/drivers/net/tg3.h b/drivers/net/tg3.h
index 44a505d..91139fd 100644
--- a/drivers/net/tg3.h
+++ b/drivers/net/tg3.h
@@ -1203,14 +1203,18 @@
#define DEFAULT_MB_MACRX_LOW_WATER 0x00000020
#define DEFAULT_MB_MACRX_LOW_WATER_5705 0x00000010
#define DEFAULT_MB_MACRX_LOW_WATER_5906 0x00000004
+#define DEFAULT_MB_MACRX_LOW_WATER_57765 0x0000002a
#define DEFAULT_MB_MACRX_LOW_WATER_JUMBO 0x00000098
#define DEFAULT_MB_MACRX_LOW_WATER_JUMBO_5780 0x0000004b
+#define DEFAULT_MB_MACRX_LOW_WATER_JUMBO_57765 0x0000007e
#define BUFMGR_MB_HIGH_WATER 0x00004418
#define DEFAULT_MB_HIGH_WATER 0x00000060
#define DEFAULT_MB_HIGH_WATER_5705 0x00000060
#define DEFAULT_MB_HIGH_WATER_5906 0x00000010
+#define DEFAULT_MB_HIGH_WATER_57765 0x000000a0
#define DEFAULT_MB_HIGH_WATER_JUMBO 0x0000017c
#define DEFAULT_MB_HIGH_WATER_JUMBO_5780 0x00000096
+#define DEFAULT_MB_HIGH_WATER_JUMBO_57765 0x000000ea
#define BUFMGR_RX_MB_ALLOC_REQ 0x0000441c
#define BUFMGR_MB_ALLOC_BIT 0x10000000
#define BUFMGR_RX_MB_ALLOC_RESP 0x00004420