[PATCH] drm/amd/amdgpu: Add sensors debugfs support
StDenis, Tom
Tom.StDenis at amd.com
Fri Sep 16 11:45:21 UTC 2016
The idea was to treat it like a somewhat normal file. So every 4 bytes is a new sensor. So I do "*pos >>= 2" to map an offset to an index. Linux doesn't care that I modified *pos though because we're not allowing the user to read more than a 4 bytes at a time (so if they tried to read more than a page it would just fail anyways).
Tom
________________________________
From: Edward O'Callaghan <funfunctor at folklore1984.net>
Sent: Friday, September 16, 2016 01:24
To: Tom St Denis; amd-gfx at lists.freedesktop.org
Cc: StDenis, Tom
Subject: Re: [PATCH] drm/amd/amdgpu: Add sensors debugfs support
On 09/15/2016 11:22 PM, Tom St Denis wrote:
> This patch adds a callback to powerplay which
> reads specific PP sensors (vdd/clocks/load) which is then
> accessible via debugfs. The idea being is it'll be a standard
> interface between different ASICs that userland tools can
> read.
>
> Currently only CZ/ST is supported but the others are
> NULL'ed off so they shouldn't cause any sort of oops.
>
> Signed-off-by: Tom St Denis <tom.stdenis at amd.com>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 31 +++++++
> drivers/gpu/drm/amd/powerplay/amd_powerplay.c | 20 +++++
> drivers/gpu/drm/amd/powerplay/hwmgr/cz_hwmgr.c | 96 ++++++++++++++++++++++
> drivers/gpu/drm/amd/powerplay/hwmgr/fiji_hwmgr.c | 1 +
> .../gpu/drm/amd/powerplay/hwmgr/iceland_hwmgr.c | 1 +
> .../gpu/drm/amd/powerplay/hwmgr/polaris10_hwmgr.c | 1 +
> drivers/gpu/drm/amd/powerplay/hwmgr/tonga_hwmgr.c | 1 +
> drivers/gpu/drm/amd/powerplay/inc/amd_powerplay.h | 10 +++
> drivers/gpu/drm/amd/powerplay/inc/hwmgr.h | 1 +
> 9 files changed, 162 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> index 9103e7baf26e..b6a4588c95ee 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> @@ -2841,6 +2841,29 @@ static ssize_t amdgpu_debugfs_gca_config_read(struct file *f, char __user *buf,
> return result;
> }
>
> +static ssize_t amdgpu_debugfs_sensor_read(struct file *f, char __user *buf,
> + size_t size, loff_t *pos)
> +{
> + struct amdgpu_device *adev = f->f_inode->i_private;
> + int r;
> + int32_t value;
> +
> + if (size != 4 || *pos & 0x3)
Just some minor questions,
maybe I miss-read but maybe dereference pos the once and have it const?
> + return -EINVAL;
> +
> + /* convert offset to sensor number */
> + *pos >>= 2;
Is the intent here just a local mutation or a in-place global state
transition?
Kind Regards,
Edward.
> +
> + if (adev->powerplay.pp_funcs && adev->powerplay.pp_funcs->read_sensor)
> + r = adev->powerplay.pp_funcs->read_sensor(adev->powerplay.pp_handle, *pos, &value);
> + else
> + r = -EINVAL;
> +
> + if (!r)
> + r = put_user(value, (int32_t *)buf);
> +
> + return !r ? 4 : r;
> +}
>
> static const struct file_operations amdgpu_debugfs_regs_fops = {
> .owner = THIS_MODULE,
> @@ -2873,12 +2896,19 @@ static const struct file_operations amdgpu_debugfs_gca_config_fops = {
> .llseek = default_llseek
> };
>
> +static const struct file_operations amdgpu_debugfs_sensors_fops = {
> + .owner = THIS_MODULE,
> + .read = amdgpu_debugfs_sensor_read,
> + .llseek = default_llseek
> +};
> +
> static const struct file_operations *debugfs_regs[] = {
> &amdgpu_debugfs_regs_fops,
> &amdgpu_debugfs_regs_didt_fops,
> &amdgpu_debugfs_regs_pcie_fops,
> &amdgpu_debugfs_regs_smc_fops,
> &amdgpu_debugfs_gca_config_fops,
> + &amdgpu_debugfs_sensors_fops,
> };
>
> static const char *debugfs_regs_names[] = {
> @@ -2887,6 +2917,7 @@ static const char *debugfs_regs_names[] = {
> "amdgpu_regs_pcie",
> "amdgpu_regs_smc",
> "amdgpu_gca_config",
> + "amdgpu_sensors",
> };
>
> static int amdgpu_debugfs_regs_init(struct amdgpu_device *adev)
> diff --git a/drivers/gpu/drm/amd/powerplay/amd_powerplay.c b/drivers/gpu/drm/amd/powerplay/amd_powerplay.c
> index b1d19409bf86..ee0368381e82 100644
> --- a/drivers/gpu/drm/amd/powerplay/amd_powerplay.c
> +++ b/drivers/gpu/drm/amd/powerplay/amd_powerplay.c
> @@ -894,6 +894,25 @@ static int pp_dpm_set_mclk_od(void *handle, uint32_t value)
> return hwmgr->hwmgr_func->set_mclk_od(hwmgr, value);
> }
>
> +static int pp_dpm_read_sensor(void *handle, int idx, int32_t *value)
> +{
> + struct pp_hwmgr *hwmgr;
> +
> + if (!handle)
> + return -EINVAL;
> +
> + hwmgr = ((struct pp_instance *)handle)->hwmgr;
> +
> + PP_CHECK_HW(hwmgr);
> +
> + if (hwmgr->hwmgr_func->read_sensor == NULL) {
> + printk(KERN_INFO "%s was not implemented.\n", __func__);
> + return 0;
> + }
> +
> + return hwmgr->hwmgr_func->read_sensor(hwmgr, idx, value);
> +}
> +
> const struct amd_powerplay_funcs pp_dpm_funcs = {
> .get_temperature = pp_dpm_get_temperature,
> .load_firmware = pp_dpm_load_fw,
> @@ -920,6 +939,7 @@ const struct amd_powerplay_funcs pp_dpm_funcs = {
> .set_sclk_od = pp_dpm_set_sclk_od,
> .get_mclk_od = pp_dpm_get_mclk_od,
> .set_mclk_od = pp_dpm_set_mclk_od,
> + .read_sensor = pp_dpm_read_sensor,
> };
>
> static int amd_pp_instance_init(struct amd_pp_init *pp_init,
> diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/cz_hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/cz_hwmgr.c
> index 5ecef1732e20..9f3c5a8a903c 100644
> --- a/drivers/gpu/drm/amd/powerplay/hwmgr/cz_hwmgr.c
> +++ b/drivers/gpu/drm/amd/powerplay/hwmgr/cz_hwmgr.c
> @@ -1857,6 +1857,101 @@ static int cz_get_max_high_clocks(struct pp_hwmgr *hwmgr, struct amd_pp_simple_c
> return 0;
> }
>
> +static int cz_read_sensor(struct pp_hwmgr *hwmgr, int idx, int32_t *value)
> +{
> + struct cz_hwmgr *cz_hwmgr = (struct cz_hwmgr *)(hwmgr->backend);
> +
> + struct phm_clock_voltage_dependency_table *table =
> + hwmgr->dyn_state.vddc_dependency_on_sclk;
> +
> + struct phm_vce_clock_voltage_dependency_table *vce_table =
> + hwmgr->dyn_state.vce_clock_voltage_dependency_table;
> +
> + struct phm_uvd_clock_voltage_dependency_table *uvd_table =
> + hwmgr->dyn_state.uvd_clock_voltage_dependency_table;
> +
> + uint32_t sclk_index = PHM_GET_FIELD(cgs_read_ind_register(hwmgr->device, CGS_IND_REG__SMC, ixTARGET_AND_CURRENT_PROFILE_INDEX),
> + TARGET_AND_CURRENT_PROFILE_INDEX, CURR_SCLK_INDEX);
> + uint32_t uvd_index = PHM_GET_FIELD(cgs_read_ind_register(hwmgr->device, CGS_IND_REG__SMC, ixTARGET_AND_CURRENT_PROFILE_INDEX_2),
> + TARGET_AND_CURRENT_PROFILE_INDEX_2, CURR_UVD_INDEX);
> + uint32_t vce_index = PHM_GET_FIELD(cgs_read_ind_register(hwmgr->device, CGS_IND_REG__SMC, ixTARGET_AND_CURRENT_PROFILE_INDEX_2),
> + TARGET_AND_CURRENT_PROFILE_INDEX_2, CURR_VCE_INDEX);
> +
> + uint32_t sclk, vclk, dclk, ecclk, tmp, activity_percent;
> + uint16_t vddnb, vddgfx;
> + int result;
> +
> + switch (idx) {
> + case AMDGPU_PP_SENSOR_GFX_SCLK:
> + if (sclk_index < NUM_SCLK_LEVELS) {
> + sclk = table->entries[sclk_index].clk;
> + *value = sclk;
> + return 0;
> + }
> + return -EINVAL;
> + case AMDGPU_PP_SENSOR_VDDNB:
> + tmp = (cgs_read_ind_register(hwmgr->device, CGS_IND_REG__SMC, ixSMUSVI_NB_CURRENTVID) &
> + CURRENT_NB_VID_MASK) >> CURRENT_NB_VID__SHIFT;
> + vddnb = cz_convert_8Bit_index_to_voltage(hwmgr, tmp);
> + *value = vddnb;
> + return 0;
> + case AMDGPU_PP_SENSOR_VDDGFX:
> + tmp = (cgs_read_ind_register(hwmgr->device, CGS_IND_REG__SMC, ixSMUSVI_GFX_CURRENTVID) &
> + CURRENT_GFX_VID_MASK) >> CURRENT_GFX_VID__SHIFT;
> + vddgfx = cz_convert_8Bit_index_to_voltage(hwmgr, (u16)tmp);
> + *value = vddgfx;
> + return 0;
> + case AMDGPU_PP_SENSOR_UVD_VCLK:
> + if (!cz_hwmgr->uvd_power_gated) {
> + if (uvd_index >= CZ_MAX_HARDWARE_POWERLEVELS) {
> + return -EINVAL;
> + } else {
> + vclk = uvd_table->entries[uvd_index].vclk;
> + *value = vclk;
> + return 0;
> + }
> + }
> + *value = 0;
> + return 0;
> + case AMDGPU_PP_SENSOR_UVD_DCLK:
> + if (!cz_hwmgr->uvd_power_gated) {
> + if (uvd_index >= CZ_MAX_HARDWARE_POWERLEVELS) {
> + return -EINVAL;
> + } else {
> + dclk = uvd_table->entries[uvd_index].dclk;
> + *value = dclk;
> + return 0;
> + }
> + }
> + *value = 0;
> + return 0;
> + case AMDGPU_PP_SENSOR_VCE_ECCLK:
> + if (!cz_hwmgr->vce_power_gated) {
> + if (vce_index >= CZ_MAX_HARDWARE_POWERLEVELS) {
> + return -EINVAL;
> + } else {
> + ecclk = vce_table->entries[vce_index].ecclk;
> + *value = ecclk;
> + return 0;
> + }
> + }
> + *value = 0;
> + return 0;
> + case AMDGPU_PP_SENSOR_GPU_LOAD:
> + result = smum_send_msg_to_smc(hwmgr->smumgr, PPSMC_MSG_GetAverageGraphicsActivity);
> + if (0 == result) {
> + activity_percent = cgs_read_register(hwmgr->device, mmSMU_MP1_SRBM2P_ARG_0);
> + activity_percent = activity_percent > 100 ? 100 : activity_percent;
> + } else {
> + activity_percent = 50;
> + }
> + *value = activity_percent;
> + return 0;
> + default:
> + return -EINVAL;
> + }
> +}
> +
> static const struct pp_hwmgr_func cz_hwmgr_funcs = {
> .backend_init = cz_hwmgr_backend_init,
> .backend_fini = cz_hwmgr_backend_fini,
> @@ -1882,6 +1977,7 @@ static const struct pp_hwmgr_func cz_hwmgr_funcs = {
> .get_current_shallow_sleep_clocks = cz_get_current_shallow_sleep_clocks,
> .get_clock_by_type = cz_get_clock_by_type,
> .get_max_high_clocks = cz_get_max_high_clocks,
> + .read_sensor = cz_read_sensor,
> };
>
> int cz_hwmgr_init(struct pp_hwmgr *hwmgr)
> diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/fiji_hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/fiji_hwmgr.c
> index 0d4c99b9e3f9..c64def1884c9 100644
> --- a/drivers/gpu/drm/amd/powerplay/hwmgr/fiji_hwmgr.c
> +++ b/drivers/gpu/drm/amd/powerplay/hwmgr/fiji_hwmgr.c
> @@ -5590,6 +5590,7 @@ static const struct pp_hwmgr_func fiji_hwmgr_funcs = {
> .set_sclk_od = fiji_set_sclk_od,
> .get_mclk_od = fiji_get_mclk_od,
> .set_mclk_od = fiji_set_mclk_od,
> + .read_sensor = NULL,
> };
>
> int fiji_hwmgr_init(struct pp_hwmgr *hwmgr)
> diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/iceland_hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/iceland_hwmgr.c
> index 5abe43360ec0..d7a1410402d4 100644
> --- a/drivers/gpu/drm/amd/powerplay/hwmgr/iceland_hwmgr.c
> +++ b/drivers/gpu/drm/amd/powerplay/hwmgr/iceland_hwmgr.c
> @@ -5663,6 +5663,7 @@ static const struct pp_hwmgr_func iceland_hwmgr_funcs = {
> .set_sclk_od = iceland_set_sclk_od,
> .get_mclk_od = iceland_get_mclk_od,
> .set_mclk_od = iceland_set_mclk_od,
> + .read_sensor = NULL,
> };
>
> int iceland_hwmgr_init(struct pp_hwmgr *hwmgr)
> diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/polaris10_hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/polaris10_hwmgr.c
> index 970e3930452d..8da1d0f66240 100644
> --- a/drivers/gpu/drm/amd/powerplay/hwmgr/polaris10_hwmgr.c
> +++ b/drivers/gpu/drm/amd/powerplay/hwmgr/polaris10_hwmgr.c
> @@ -5278,6 +5278,7 @@ static const struct pp_hwmgr_func polaris10_hwmgr_funcs = {
> .set_sclk_od = polaris10_set_sclk_od,
> .get_mclk_od = polaris10_get_mclk_od,
> .set_mclk_od = polaris10_set_mclk_od,
> + .read_sensor = NULL,
> };
>
> int polaris10_hwmgr_init(struct pp_hwmgr *hwmgr)
> diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/tonga_hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/tonga_hwmgr.c
> index 42783bf7647c..a5175ea5bb46 100644
> --- a/drivers/gpu/drm/amd/powerplay/hwmgr/tonga_hwmgr.c
> +++ b/drivers/gpu/drm/amd/powerplay/hwmgr/tonga_hwmgr.c
> @@ -6359,6 +6359,7 @@ static const struct pp_hwmgr_func tonga_hwmgr_funcs = {
> .set_sclk_od = tonga_set_sclk_od,
> .get_mclk_od = tonga_get_mclk_od,
> .set_mclk_od = tonga_set_mclk_od,
> + .read_sensor = NULL,
> };
>
> int tonga_hwmgr_init(struct pp_hwmgr *hwmgr)
> diff --git a/drivers/gpu/drm/amd/powerplay/inc/amd_powerplay.h b/drivers/gpu/drm/amd/powerplay/inc/amd_powerplay.h
> index 18f39e89a7aa..bafb593b568a 100644
> --- a/drivers/gpu/drm/amd/powerplay/inc/amd_powerplay.h
> +++ b/drivers/gpu/drm/amd/powerplay/inc/amd_powerplay.h
> @@ -29,6 +29,15 @@
> #include "amd_shared.h"
> #include "cgs_common.h"
>
> +enum amd_pp_sensors {
> + AMDGPU_PP_SENSOR_GFX_SCLK = 0,
> + AMDGPU_PP_SENSOR_VDDNB,
> + AMDGPU_PP_SENSOR_VDDGFX,
> + AMDGPU_PP_SENSOR_UVD_VCLK,
> + AMDGPU_PP_SENSOR_UVD_DCLK,
> + AMDGPU_PP_SENSOR_VCE_ECCLK,
> + AMDGPU_PP_SENSOR_GPU_LOAD,
> +};
>
> enum amd_pp_event {
> AMD_PP_EVENT_INITIALIZE = 0,
> @@ -346,6 +355,7 @@ struct amd_powerplay_funcs {
> int (*set_sclk_od)(void *handle, uint32_t value);
> int (*get_mclk_od)(void *handle);
> int (*set_mclk_od)(void *handle, uint32_t value);
> + int (*read_sensor)(void *handle, int idx, int32_t *value);
> };
>
> struct amd_powerplay {
> diff --git a/drivers/gpu/drm/amd/powerplay/inc/hwmgr.h b/drivers/gpu/drm/amd/powerplay/inc/hwmgr.h
> index e98748344801..310ba0ce2934 100644
> --- a/drivers/gpu/drm/amd/powerplay/inc/hwmgr.h
> +++ b/drivers/gpu/drm/amd/powerplay/inc/hwmgr.h
> @@ -359,6 +359,7 @@ struct pp_hwmgr_func {
> int (*set_sclk_od)(struct pp_hwmgr *hwmgr, uint32_t value);
> int (*get_mclk_od)(struct pp_hwmgr *hwmgr);
> int (*set_mclk_od)(struct pp_hwmgr *hwmgr, uint32_t value);
> + int (*read_sensor)(struct pp_hwmgr *hwmgr, int idx, int32_t *value);
> };
>
> struct pp_table_func {
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/amd-gfx/attachments/20160916/656f9310/attachment-0001.html>
More information about the amd-gfx
mailing list