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drm/amdgpu: Fix pcie_bw on Vega20

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The registers used for VG20 are different in that certain performance
counters were split off to TXCLK3/4. Vega10/12 doesn't have this, so add
a new vg20_get_pcie_usage to reflect this change.

Signed-off-by: Kent Russell <kent.russell@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Kent Russell 2019-07-31 09:24:32 -04:00 committed by Alex Deucher
parent 57d352f769
commit 612e4ed99b
1 changed files with 52 additions and 8 deletions
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60
drivers/gpu/drm/amd/amdgpu/soc15.c
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@ -785,14 +785,9 @@ static void soc15_get_pcie_usage(struct amdgpu_device *adev, uint64_t *count0,
/* Set the 2 events that we wish to watch, defined above */
/* Reg 40 is # received msgs */
/* Reg 104 is # of posted requests sent */
perfctr = REG_SET_FIELD(perfctr, PCIE_PERF_CNTL_TXCLK, EVENT0_SEL, 40);
/* Pre-VG20, Reg 104 is # of posted requests sent. On VG20 it's 108 */
if (adev->asic_type == CHIP_VEGA20)
perfctr = REG_SET_FIELD(perfctr, PCIE_PERF_CNTL_TXCLK,
EVENT1_SEL, 108);
else
perfctr = REG_SET_FIELD(perfctr, PCIE_PERF_CNTL_TXCLK,
EVENT1_SEL, 104);
perfctr = REG_SET_FIELD(perfctr, PCIE_PERF_CNTL_TXCLK, EVENT1_SEL, 104);
/* Write to enable desired perf counters */
WREG32_PCIE(smnPCIE_PERF_CNTL_TXCLK, perfctr);
@ -822,6 +817,55 @@ static void soc15_get_pcie_usage(struct amdgpu_device *adev, uint64_t *count0,
*count1 = RREG32_PCIE(smnPCIE_PERF_COUNT1_TXCLK) | (cnt1_of << 32);
}
static void vega20_get_pcie_usage(struct amdgpu_device *adev, uint64_t *count0,
uint64_t *count1)
{
uint32_t perfctr = 0;
uint64_t cnt0_of, cnt1_of;
int tmp;
/* This reports 0 on APUs, so return to avoid writing/reading registers
* that may or may not be different from their GPU counterparts
*/
if (adev->flags & AMD_IS_APU)
return;
/* Set the 2 events that we wish to watch, defined above */
/* Reg 40 is # received msgs */
/* Reg 108 is # of posted requests sent on VG20 */
perfctr = REG_SET_FIELD(perfctr, PCIE_PERF_CNTL_TXCLK3,
EVENT0_SEL, 40);
perfctr = REG_SET_FIELD(perfctr, PCIE_PERF_CNTL_TXCLK3,
EVENT1_SEL, 108);
/* Write to enable desired perf counters */
WREG32_PCIE(smnPCIE_PERF_CNTL_TXCLK3, perfctr);
/* Zero out and enable the perf counters
* Write 0x5:
* Bit 0 = Start all counters(1)
* Bit 2 = Global counter reset enable(1)
*/
WREG32_PCIE(smnPCIE_PERF_COUNT_CNTL, 0x00000005);
msleep(1000);
/* Load the shadow and disable the perf counters
* Write 0x2:
* Bit 0 = Stop counters(0)
* Bit 1 = Load the shadow counters(1)
*/
WREG32_PCIE(smnPCIE_PERF_COUNT_CNTL, 0x00000002);
/* Read register values to get any >32bit overflow */
tmp = RREG32_PCIE(smnPCIE_PERF_CNTL_TXCLK3);
cnt0_of = REG_GET_FIELD(tmp, PCIE_PERF_CNTL_TXCLK3, COUNTER0_UPPER);
cnt1_of = REG_GET_FIELD(tmp, PCIE_PERF_CNTL_TXCLK3, COUNTER1_UPPER);
/* Get the values and add the overflow */
*count0 = RREG32_PCIE(smnPCIE_PERF_COUNT0_TXCLK3) | (cnt0_of << 32);
*count1 = RREG32_PCIE(smnPCIE_PERF_COUNT1_TXCLK3) | (cnt1_of << 32);
}
static bool soc15_need_reset_on_init(struct amdgpu_device *adev)
{
u32 sol_reg;
@ -893,7 +937,7 @@ static const struct amdgpu_asic_funcs vega20_asic_funcs =
.invalidate_hdp = &soc15_invalidate_hdp,
.need_full_reset = &soc15_need_full_reset,
.init_doorbell_index = &vega20_doorbell_index_init,
.get_pcie_usage = &soc15_get_pcie_usage,
.get_pcie_usage = &vega20_get_pcie_usage,
.need_reset_on_init = &soc15_need_reset_on_init,
.get_pcie_replay_count = &soc15_get_pcie_replay_count,
.reset_method = &soc15_asic_reset_method