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drm/amd/pm: Enable performance determinism on aldebaran

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Performance Determinism is a new mode in Aldebaran where PMFW tries to
maintain sustained performance level. It can be enabled on a per-die
basis on aldebaran. To guarantee that it remains within the power cap,
a max GFX frequency needs to be specified in this mode. A new
power_dpm_force_performance_level, "perf_determinism", is defined to enable
this mode in amdgpu. The max frequency (in MHz) can be specified through
pp_dpm_sclk. The mode will be disabled once any other performance level
is chosen.

Ex: To enable perf determinism at 900Mhz max gfx clock

echo perf_determinism > /sys/bus/pci/devices/.../power_dpm_force_performance_level
echo max 900 > /sys/bus/pci/devices/.../pp_dpm_sclk

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Kenneth Feng <kenneth.feng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Lijo Lazar
2021-03-05 16:02:49 -05:00
committed by Alex Deucher
parent 26256ca8a6
commit 6be6424684
4 changed files with 150 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/gpu/drm/amd/include/kgd_pp_interface.h
View File

@@ -48,6 +48,7 @@ enum amd_dpm_forced_level {
AMD_DPM_FORCED_LEVEL_PROFILE_MIN_MCLK = 0x40,
AMD_DPM_FORCED_LEVEL_PROFILE_PEAK = 0x80,
AMD_DPM_FORCED_LEVEL_PROFILE_EXIT = 0x100,
AMD_DPM_FORCED_LEVEL_PERF_DETERMINISM = 0x200,
};
enum amd_pm_state_type {

88
drivers/gpu/drm/amd/pm/amdgpu_pm.c
View File

@@ -292,6 +292,7 @@ static ssize_t amdgpu_get_power_dpm_force_performance_level(struct device *dev,
(level == AMD_DPM_FORCED_LEVEL_PROFILE_MIN_SCLK) ? "profile_min_sclk" :
(level == AMD_DPM_FORCED_LEVEL_PROFILE_MIN_MCLK) ? "profile_min_mclk" :
(level == AMD_DPM_FORCED_LEVEL_PROFILE_PEAK) ? "profile_peak" :
(level == AMD_DPM_FORCED_LEVEL_PERF_DETERMINISM) ? "perf_determinism" :
"unknown");
}
@@ -328,6 +329,8 @@ static ssize_t amdgpu_set_power_dpm_force_performance_level(struct device *dev,
level = AMD_DPM_FORCED_LEVEL_PROFILE_MIN_MCLK;
} else if (strncmp("profile_peak", buf, strlen("profile_peak")) == 0) {
level = AMD_DPM_FORCED_LEVEL_PROFILE_PEAK;
} else if (strncmp("perf_determinism", buf, strlen("perf_determinism")) == 0) {
level = AMD_DPM_FORCED_LEVEL_PERF_DETERMINISM;
} else {
return -EINVAL;
}
@@ -1039,6 +1042,83 @@ static ssize_t amdgpu_get_pp_dpm_clock(struct device *dev,
*/
#define AMDGPU_MASK_BUF_MAX (32 * 13)
static int amdgpu_read_clk(const char *buf,
size_t count,
uint32_t *min,
uint32_t *max)
{
int ret;
char *tmp;
char *token = NULL;
char *tag;
char *value;
char buf_cpy[AMDGPU_MASK_BUF_MAX + 1];
const char delimiter[3] = {' ', '\n', '\0'};
size_t bytes;
int i = 0;
bytes = min(count, sizeof(buf_cpy) - 1);
memcpy(buf_cpy, buf, bytes);
buf_cpy[bytes] = '\0';
tmp = buf_cpy;
*min = *max = 0;
while (i < 2) {
ret = -EINVAL;
token = strsep(&tmp, delimiter);
if (!token || !*token)
break;
tag = token;
token = strsep(&tmp, delimiter);
if (!token || !*token)
break;
value = token;
if (!strncmp(tag, "min", strlen("min")))
ret = kstrtou32(value, 0, min);
else if (!strncmp(tag, "max", strlen("max")))
ret = kstrtou32(value, 0, max);
if (ret)
break;
++i;
}
/* should get a non-zero value for min or max */
if (!*min && !*max)
return -EINVAL;
return 0;
}
static int amdgpu_set_clk_minmax(struct amdgpu_device *adev,
uint32_t clk_type,
uint32_t min,
uint32_t max)
{
int ret;
if (!is_support_sw_smu(adev) || amdgpu_sriov_vf(adev))
return -EINVAL;
ret = pm_runtime_get_sync(adev_to_drm(adev)->dev);
if (ret < 0) {
pm_runtime_put_autosuspend(adev_to_drm(adev)->dev);
return ret;
}
ret = smu_set_soft_freq_range(&adev->smu, clk_type, min, max);
pm_runtime_mark_last_busy(adev_to_drm(adev)->dev);
pm_runtime_put_autosuspend(adev_to_drm(adev)->dev);
if (ret)
return -EINVAL;
return 0;
}
static ssize_t amdgpu_read_mask(const char *buf, size_t count, uint32_t *mask)
{
int ret;
@@ -1077,10 +1157,18 @@ static ssize_t amdgpu_set_pp_dpm_clock(struct device *dev,
struct amdgpu_device *adev = drm_to_adev(ddev);
int ret;
uint32_t mask = 0;
uint32_t min;
uint32_t max;
if (amdgpu_in_reset(adev))
return -EPERM;
ret = amdgpu_read_clk(buf, count, &min, &max);
if (!ret) {
ret = amdgpu_set_clk_minmax(adev, SMU_GFXCLK, min, max);
return ret ? ret:count;
}
ret = amdgpu_read_mask(buf, count, &mask);
if (ret)
return ret;

6
drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
View File

@@ -1663,7 +1663,8 @@ static int smu_adjust_power_state_dynamic(struct smu_context *smu,
smu_dpm_ctx->dpm_level = level;
}
if (smu_dpm_ctx->dpm_level != AMD_DPM_FORCED_LEVEL_MANUAL) {
if (smu_dpm_ctx->dpm_level != AMD_DPM_FORCED_LEVEL_MANUAL &&
smu_dpm_ctx->dpm_level != AMD_DPM_FORCED_LEVEL_PERF_DETERMINISM) {
index = fls(smu->workload_mask);
index = index > 0 && index <= WORKLOAD_POLICY_MAX ? index - 1 : 0;
workload = smu->workload_setting[index];
@@ -1751,7 +1752,8 @@ int smu_switch_power_profile(void *handle,
workload = smu->workload_setting[index];
}
if (smu_dpm_ctx->dpm_level != AMD_DPM_FORCED_LEVEL_MANUAL)
if (smu_dpm_ctx->dpm_level != AMD_DPM_FORCED_LEVEL_MANUAL &&
smu_dpm_ctx->dpm_level != AMD_DPM_FORCED_LEVEL_PERF_DETERMINISM)
smu_bump_power_profile_mode(smu, &workload, 0);
mutex_unlock(&smu->mutex);

59
drivers/gpu/drm/amd/pm/swsmu/smu13/aldebaran_ppt.c
View File

@@ -1078,7 +1078,6 @@ static int aldebaran_get_power_limit(struct smu_context *smu)
dev_err(smu->adev->dev, "Cannot get PPT limit due to pptable missing!");
return -EINVAL;
}
power_limit = pptable->PptLimit;
}
@@ -1103,7 +1102,19 @@ static int aldebaran_system_features_control(struct smu_context *smu, bool enab
static int aldebaran_set_performance_level(struct smu_context *smu,
enum amd_dpm_forced_level level)
{
struct smu_dpm_context *smu_dpm = &(smu->smu_dpm);
/* Disable determinism if switching to another mode */
if ((smu_dpm->dpm_level == AMD_DPM_FORCED_LEVEL_PERF_DETERMINISM)
&& (level != AMD_DPM_FORCED_LEVEL_PERF_DETERMINISM))
smu_cmn_send_smc_msg(smu, SMU_MSG_DisableDeterminism, NULL);
switch (level) {
case AMD_DPM_FORCED_LEVEL_PERF_DETERMINISM:
return 0;
case AMD_DPM_FORCED_LEVEL_HIGH:
case AMD_DPM_FORCED_LEVEL_LOW:
case AMD_DPM_FORCED_LEVEL_PROFILE_STANDARD:
@@ -1117,6 +1128,50 @@ static int aldebaran_set_performance_level(struct smu_context *smu,
return smu_v13_0_set_performance_level(smu, level);
}
static int aldebaran_set_soft_freq_limited_range(struct smu_context *smu,
enum smu_clk_type clk_type,
uint32_t min,
uint32_t max)
{
struct smu_dpm_context *smu_dpm = &(smu->smu_dpm);
struct smu_13_0_dpm_context *dpm_context = smu_dpm->dpm_context;
struct amdgpu_device *adev = smu->adev;
uint32_t min_clk;
uint32_t max_clk;
int ret = 0;
if (clk_type != SMU_GFXCLK && clk_type != SMU_SCLK)
return -EINVAL;
if (smu_dpm->dpm_level != AMD_DPM_FORCED_LEVEL_PERF_DETERMINISM)
return -EINVAL;
if (smu_dpm->dpm_level == AMD_DPM_FORCED_LEVEL_PERF_DETERMINISM) {
if (!max || (max < dpm_context->dpm_tables.gfx_table.min) ||
(max > dpm_context->dpm_tables.gfx_table.max)) {
dev_warn(adev->dev,
"Invalid max frequency %d MHz specified for determinism\n", max);
return -EINVAL;
}
/* Restore default min/max clocks and enable determinism */
min_clk = dpm_context->dpm_tables.gfx_table.min;
max_clk = dpm_context->dpm_tables.gfx_table.max;
ret = smu_v13_0_set_soft_freq_limited_range(smu, SMU_GFXCLK, min_clk, max_clk);
if (!ret) {
usleep_range(500, 1000);
ret = smu_cmn_send_smc_msg_with_param(smu,
SMU_MSG_EnableDeterminism,
max, NULL);
if (ret)
dev_err(adev->dev,
"Failed to enable determinism at GFX clock %d MHz\n", max);
}
}
return ret;
}
static bool aldebaran_is_dpm_running(struct smu_context *smu)
{
int ret = 0;
@@ -1351,7 +1406,7 @@ static const struct pptable_funcs aldebaran_ppt_funcs = {
.get_max_sustainable_clocks_by_dc = smu_v13_0_get_max_sustainable_clocks_by_dc,
.baco_is_support= aldebaran_is_baco_supported,
.get_dpm_ultimate_freq = smu_v13_0_get_dpm_ultimate_freq,
.set_soft_freq_limited_range = smu_v13_0_set_soft_freq_limited_range,
.set_soft_freq_limited_range = aldebaran_set_soft_freq_limited_range,
.set_df_cstate = aldebaran_set_df_cstate,
.allow_xgmi_power_down = aldebaran_allow_xgmi_power_down,
.log_thermal_throttling_event = aldebaran_log_thermal_throttling_event,