drm/amd/powerplay: implement sysfs of pp_table for smu11 (v2)

add pp_table sysfs interface for new sw-smu.
get: return pptable raw data
set: write pptable raw data to pptable, then reset smu (hw_fini -> hw_init)

v2: fix mutex lock issue

Signed-off-by: Kevin Wang <Kevin1.Wang@amd.com>
Reviewed-by: Huang Rui <ray.huang@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
index e2d4235..7a9e658 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
@@ -464,7 +464,12 @@ static ssize_t amdgpu_get_pp_table(struct device *dev,
        char *table = NULL;
        int size;
 
-       if (adev->powerplay.pp_funcs->get_pp_table)
+       if (is_support_sw_smu(adev)) {
+               size = smu_sys_get_pp_table(&adev->smu, (void **)&table);
+               if (size < 0)
+                       return size;
+       }
+       else if (adev->powerplay.pp_funcs->get_pp_table)
                size = amdgpu_dpm_get_pp_table(adev, &table);
        else
                return 0;
@@ -484,8 +489,13 @@ static ssize_t amdgpu_set_pp_table(struct device *dev,
 {
        struct drm_device *ddev = dev_get_drvdata(dev);
        struct amdgpu_device *adev = ddev->dev_private;
+       int ret = 0;
 
-       if (adev->powerplay.pp_funcs->set_pp_table)
+       if (is_support_sw_smu(adev)) {
+               ret = smu_sys_set_pp_table(&adev->smu, (void *)buf, count);
+               if (ret)
+                       return ret;
+       } else if (adev->powerplay.pp_funcs->set_pp_table)
                amdgpu_dpm_set_pp_table(adev, buf, count);
 
        return count;

diff --git a/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c b/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c
index f35c217..f17c85f 100644 (file)
--- a/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c
+++ b/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c
@@ -76,6 +76,54 @@ bool is_support_sw_smu(struct amdgpu_device *adev)
        return false;
 }
 
+int smu_sys_get_pp_table(struct smu_context *smu, void **table)
+{
+       struct smu_table_context *smu_table = &smu->smu_table;
+
+       if (!smu_table->power_play_table && !smu_table->hardcode_pptable)
+               return -EINVAL;
+
+       if (smu_table->hardcode_pptable)
+               *table = smu_table->hardcode_pptable;
+       else
+               *table = smu_table->power_play_table;
+
+       return smu_table->power_play_table_size;
+}
+
+int smu_sys_set_pp_table(struct smu_context *smu,  void *buf, size_t size)
+{
+       struct smu_table_context *smu_table = &smu->smu_table;
+       ATOM_COMMON_TABLE_HEADER *header = (ATOM_COMMON_TABLE_HEADER *)buf;
+       int ret = 0;
+
+       if (header->usStructureSize != size) {
+               pr_err("pp table size not matched !\n");
+               return -EIO;
+       }
+
+       mutex_lock(&smu->mutex);
+       if (!smu_table->hardcode_pptable)
+               smu_table->hardcode_pptable = kzalloc(size, GFP_KERNEL);
+       if (!smu_table->hardcode_pptable) {
+               ret = -ENOMEM;
+               goto failed;
+       }
+
+       memcpy(smu_table->hardcode_pptable, buf, size);
+       smu_table->power_play_table = smu_table->hardcode_pptable;
+       smu_table->power_play_table_size = size;
+       mutex_unlock(&smu->mutex);
+
+       ret = smu_reset(smu);
+       if (ret)
+               pr_info("smu reset failed, ret = %d\n", ret);
+
+failed:
+       mutex_unlock(&smu->mutex);
+       return ret;
+}
+
 int smu_feature_init_dpm(struct smu_context *smu)
 {
        struct smu_feature *feature = &smu->smu_feature;
@@ -328,7 +376,7 @@ static int smu_fini_fb_allocations(struct smu_context *smu)
        uint32_t i = 0;
 
        if (table_count == 0 || tables == NULL)
-               return -EINVAL;
+               return 0;
 
        for (i = 0 ; i < table_count; i++) {
                if (tables[i].size == 0)
@@ -590,9 +638,10 @@ static int smu_hw_fini(void *handle)
        if (!is_support_sw_smu(adev))
                return -EINVAL;
 
-       if (!table_context->driver_pptable)
-               return -EINVAL;
-       kfree(table_context->driver_pptable);
+       if (table_context->driver_pptable) {
+               kfree(table_context->driver_pptable);
+               table_context->driver_pptable = NULL;
+       }
 
        if (table_context->max_sustainable_clocks) {
                kfree(table_context->max_sustainable_clocks);
@@ -610,6 +659,22 @@ static int smu_hw_fini(void *handle)
        return 0;
 }
 
+int smu_reset(struct smu_context *smu)
+{
+       struct amdgpu_device *adev = smu->adev;
+       int ret = 0;
+
+       ret = smu_hw_fini(adev);
+       if (ret)
+               return ret;
+
+       ret = smu_hw_init(adev);
+       if (ret)
+               return ret;
+
+       return ret;
+}
+
 static int smu_suspend(void *handle)
 {
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;

diff --git a/drivers/gpu/drm/amd/powerplay/inc/amdgpu_smu.h b/drivers/gpu/drm/amd/powerplay/inc/amdgpu_smu.h
index 43c2b9e..11e7797 100644 (file)
--- a/drivers/gpu/drm/amd/powerplay/inc/amdgpu_smu.h
+++ b/drivers/gpu/drm/amd/powerplay/inc/amdgpu_smu.h
@@ -158,6 +158,7 @@ struct smu_table_context
 {
        void                            *power_play_table;
        uint32_t                        power_play_table_size;
+       void                            *hardcode_pptable;
 
        void                            *max_sustainable_clocks;
        struct smu_bios_boot_up_values  boot_values;
@@ -372,5 +373,8 @@ extern int smu_feature_set_supported(struct smu_context *smu, int feature_id, bo
 int smu_update_table(struct smu_context *smu, uint32_t table_id,
                     void *table_data, bool drv2smu);
 bool is_support_sw_smu(struct amdgpu_device *adev);
+int smu_reset(struct smu_context *smu);
+int smu_sys_get_pp_table(struct smu_context *smu, void **table);
+int smu_sys_set_pp_table(struct smu_context *smu,  void *buf, size_t size);
 
 #endif

diff --git a/drivers/gpu/drm/amd/powerplay/smu_v11_0.c b/drivers/gpu/drm/amd/powerplay/smu_v11_0.c
index e6b16b6..7ea19eb 100644 (file)
--- a/drivers/gpu/drm/amd/powerplay/smu_v11_0.c
+++ b/drivers/gpu/drm/amd/powerplay/smu_v11_0.c
@@ -241,8 +241,10 @@ static int smu_v11_0_read_pptable_from_vbios(struct smu_context *smu)
        if (ret)
                return ret;
 
-       smu->smu_table.power_play_table = table;
-       smu->smu_table.power_play_table_size = size;
+       if (!smu->smu_table.power_play_table)
+               smu->smu_table.power_play_table = table;
+       if (!smu->smu_table.power_play_table_size)
+               smu->smu_table.power_play_table_size = size;
 
        return 0;
 }