From db9635cc14f316346c5b3954153d7e8c7016105d Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Mon, 10 Oct 2016 12:05:32 -0400 Subject: [PATCH] drm/amdgpu: used cached gca values for vi_read_register (v2) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Using the cached values has less latency for bare metal and SR-IOV, and prevents reading back bogus values if the engine is powergated. v2: fix typo in tile idx calculation Reviewed-by: Christian König Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/vi.c | 117 ++++++++++++++++++++++++++------ 1 file changed, 97 insertions(+), 20 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/vi.c b/drivers/gpu/drm/amd/amdgpu/vi.c index 657de2a9ba34..82f72cd1aebe 100644 --- a/drivers/gpu/drm/amd/amdgpu/vi.c +++ b/drivers/gpu/drm/amd/amdgpu/vi.c @@ -556,21 +556,100 @@ static const struct amdgpu_allowed_register_entry vi_allowed_read_registers[] = {mmPA_SC_RASTER_CONFIG_1, false, true}, }; -static uint32_t vi_read_indexed_register(struct amdgpu_device *adev, u32 se_num, - u32 sh_num, u32 reg_offset) -{ - uint32_t val; +static uint32_t vi_get_register_value(struct amdgpu_device *adev, + bool indexed, u32 se_num, + u32 sh_num, u32 reg_offset) +{ + if (indexed) { + uint32_t val; + unsigned se_idx = (se_num == 0xffffffff) ? 0 : se_num; + unsigned sh_idx = (sh_num == 0xffffffff) ? 0 : sh_num; + + switch (reg_offset) { + case mmCC_RB_BACKEND_DISABLE: + return adev->gfx.config.rb_config[se_idx][sh_idx].rb_backend_disable; + case mmGC_USER_RB_BACKEND_DISABLE: + return adev->gfx.config.rb_config[se_idx][sh_idx].user_rb_backend_disable; + case mmPA_SC_RASTER_CONFIG: + return adev->gfx.config.rb_config[se_idx][sh_idx].raster_config; + case mmPA_SC_RASTER_CONFIG_1: + return adev->gfx.config.rb_config[se_idx][sh_idx].raster_config_1; + } - mutex_lock(&adev->grbm_idx_mutex); - if (se_num != 0xffffffff || sh_num != 0xffffffff) - amdgpu_gfx_select_se_sh(adev, se_num, sh_num, 0xffffffff); + mutex_lock(&adev->grbm_idx_mutex); + if (se_num != 0xffffffff || sh_num != 0xffffffff) + amdgpu_gfx_select_se_sh(adev, se_num, sh_num, 0xffffffff); - val = RREG32(reg_offset); + val = RREG32(reg_offset); - if (se_num != 0xffffffff || sh_num != 0xffffffff) - amdgpu_gfx_select_se_sh(adev, 0xffffffff, 0xffffffff, 0xffffffff); - mutex_unlock(&adev->grbm_idx_mutex); - return val; + if (se_num != 0xffffffff || sh_num != 0xffffffff) + amdgpu_gfx_select_se_sh(adev, 0xffffffff, 0xffffffff, 0xffffffff); + mutex_unlock(&adev->grbm_idx_mutex); + return val; + } else { + unsigned idx; + + switch (reg_offset) { + case mmGB_ADDR_CONFIG: + return adev->gfx.config.gb_addr_config; + case mmMC_ARB_RAMCFG: + return adev->gfx.config.mc_arb_ramcfg; + case mmGB_TILE_MODE0: + case mmGB_TILE_MODE1: + case mmGB_TILE_MODE2: + case mmGB_TILE_MODE3: + case mmGB_TILE_MODE4: + case mmGB_TILE_MODE5: + case mmGB_TILE_MODE6: + case mmGB_TILE_MODE7: + case mmGB_TILE_MODE8: + case mmGB_TILE_MODE9: + case mmGB_TILE_MODE10: + case mmGB_TILE_MODE11: + case mmGB_TILE_MODE12: + case mmGB_TILE_MODE13: + case mmGB_TILE_MODE14: + case mmGB_TILE_MODE15: + case mmGB_TILE_MODE16: + case mmGB_TILE_MODE17: + case mmGB_TILE_MODE18: + case mmGB_TILE_MODE19: + case mmGB_TILE_MODE20: + case mmGB_TILE_MODE21: + case mmGB_TILE_MODE22: + case mmGB_TILE_MODE23: + case mmGB_TILE_MODE24: + case mmGB_TILE_MODE25: + case mmGB_TILE_MODE26: + case mmGB_TILE_MODE27: + case mmGB_TILE_MODE28: + case mmGB_TILE_MODE29: + case mmGB_TILE_MODE30: + case mmGB_TILE_MODE31: + idx = (reg_offset - mmGB_TILE_MODE0); + return adev->gfx.config.tile_mode_array[idx]; + case mmGB_MACROTILE_MODE0: + case mmGB_MACROTILE_MODE1: + case mmGB_MACROTILE_MODE2: + case mmGB_MACROTILE_MODE3: + case mmGB_MACROTILE_MODE4: + case mmGB_MACROTILE_MODE5: + case mmGB_MACROTILE_MODE6: + case mmGB_MACROTILE_MODE7: + case mmGB_MACROTILE_MODE8: + case mmGB_MACROTILE_MODE9: + case mmGB_MACROTILE_MODE10: + case mmGB_MACROTILE_MODE11: + case mmGB_MACROTILE_MODE12: + case mmGB_MACROTILE_MODE13: + case mmGB_MACROTILE_MODE14: + case mmGB_MACROTILE_MODE15: + idx = (reg_offset - mmGB_MACROTILE_MODE0); + return adev->gfx.config.macrotile_mode_array[idx]; + default: + return RREG32(reg_offset); + } + } } static int vi_read_register(struct amdgpu_device *adev, u32 se_num, @@ -605,10 +684,9 @@ static int vi_read_register(struct amdgpu_device *adev, u32 se_num, if (reg_offset != asic_register_entry->reg_offset) continue; if (!asic_register_entry->untouched) - *value = asic_register_entry->grbm_indexed ? - vi_read_indexed_register(adev, se_num, - sh_num, reg_offset) : - RREG32(reg_offset); + *value = vi_get_register_value(adev, + asic_register_entry->grbm_indexed, + se_num, sh_num, reg_offset); return 0; } } @@ -618,10 +696,9 @@ static int vi_read_register(struct amdgpu_device *adev, u32 se_num, continue; if (!vi_allowed_read_registers[i].untouched) - *value = vi_allowed_read_registers[i].grbm_indexed ? - vi_read_indexed_register(adev, se_num, - sh_num, reg_offset) : - RREG32(reg_offset); + *value = vi_get_register_value(adev, + vi_allowed_read_registers[i].grbm_indexed, + se_num, sh_num, reg_offset); return 0; } return -EINVAL; -- GitLab