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net: aquantia: Change inefficient wait loop on fw data reads 

B1 hardware changes behavior of mailbox interface, it has busy bit
always raised. Data ready condition should be detected by increment
of address register.

Old code has empty `for` loop, and that caused cpu overloads on B1
hardware. aq_nic_service_timer_cb consumed ~100ms because of that.

Signed-off-by: Igor Russkikh <igor.russkikh@aquantia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Igor Russkikh 2018-03-20 14:40:33 +03:00 committed by David S. Miller
parent d0f0fb25d6
commit 47203b3426
2 changed files with 28 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

42
drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c
View File

@ -21,6 +21,10 @@
#define HW_ATL_UCP_0X370_REG 0x0370U
#define HW_ATL_MIF_CMD 0x0200U
#define HW_ATL_MIF_ADDR 0x0208U
#define HW_ATL_MIF_VAL 0x020CU
#define HW_ATL_FW_SM_RAM 0x2U
#define HW_ATL_MPI_FW_VERSION 0x18
#define HW_ATL_MPI_CONTROL_ADR 0x0368U
@ -269,18 +273,22 @@ int hw_atl_utils_fw_downld_dwords(struct aq_hw_s *self, u32 a,
}
}
aq_hw_write_reg(self, 0x00000208U, a);
aq_hw_write_reg(self, HW_ATL_MIF_ADDR, a);
for (++cnt; --cnt;) {
u32 i = 0U;
for (++cnt; --cnt && !err;) {
aq_hw_write_reg(self, HW_ATL_MIF_CMD, 0x00008000U);
aq_hw_write_reg(self, 0x00000200U, 0x00008000U);
if (IS_CHIP_FEATURE(REVISION_B1))
AQ_HW_WAIT_FOR(a != aq_hw_read_reg(self,
HW_ATL_MIF_ADDR),
1, 1000U);
else
AQ_HW_WAIT_FOR(!(0x100 & aq_hw_read_reg(self,
HW_ATL_MIF_CMD)),
1, 1000U);
for (i = 1024U;
(0x100U & aq_hw_read_reg(self, 0x00000200U)) && --i;) {
}
*(p++) = aq_hw_read_reg(self, 0x0000020CU);
*(p++) = aq_hw_read_reg(self, HW_ATL_MIF_VAL);
a += 4;
}
hw_atl_reg_glb_cpu_sem_set(self, 1U, HW_ATL_FW_SM_RAM);
@ -676,14 +684,18 @@ void hw_atl_utils_hw_chip_features_init(struct aq_hw_s *self, u32 *p)
u32 val = hw_atl_reg_glb_mif_id_get(self);
u32 mif_rev = val & 0xFFU;
if ((3U & mif_rev) == 1U) {
chip_features |=
HAL_ATLANTIC_UTILS_CHIP_REVISION_A0 |
if ((0xFU & mif_rev) == 1U) {
chip_features |= HAL_ATLANTIC_UTILS_CHIP_REVISION_A0 |
HAL_ATLANTIC_UTILS_CHIP_MPI_AQ |
HAL_ATLANTIC_UTILS_CHIP_MIPS;
} else if ((3U & mif_rev) == 2U) {
chip_features |=
HAL_ATLANTIC_UTILS_CHIP_REVISION_B0 |
} else if ((0xFU & mif_rev) == 2U) {
chip_features |= HAL_ATLANTIC_UTILS_CHIP_REVISION_B0 |
HAL_ATLANTIC_UTILS_CHIP_MPI_AQ |
HAL_ATLANTIC_UTILS_CHIP_MIPS |
HAL_ATLANTIC_UTILS_CHIP_TPO2 |
HAL_ATLANTIC_UTILS_CHIP_RPF2;
} else if ((0xFU & mif_rev) == 0xAU) {
chip_features |= HAL_ATLANTIC_UTILS_CHIP_REVISION_B1 |
HAL_ATLANTIC_UTILS_CHIP_MPI_AQ |
HAL_ATLANTIC_UTILS_CHIP_MIPS |
HAL_ATLANTIC_UTILS_CHIP_TPO2 |

1
drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.h
View File

@ -161,6 +161,7 @@ struct __packed hw_aq_atl_utils_mbox {
#define HAL_ATLANTIC_UTILS_CHIP_MPI_AQ 0x00000010U
#define HAL_ATLANTIC_UTILS_CHIP_REVISION_A0 0x01000000U
#define HAL_ATLANTIC_UTILS_CHIP_REVISION_B0 0x02000000U
#define HAL_ATLANTIC_UTILS_CHIP_REVISION_B1 0x04000000U
#define IS_CHIP_FEATURE(_F_) (HAL_ATLANTIC_UTILS_CHIP_##_F_ & \
self->chip_features)