diff options
| -rw-r--r-- | drivers/gpu/drm/i915/intel_mocs.c | 13 | ||||
| -rw-r--r-- | include/uapi/drm/i915_drm.h | 24 |
2 files changed, 31 insertions, 6 deletions
diff --git a/drivers/gpu/drm/i915/intel_mocs.c b/drivers/gpu/drm/i915/intel_mocs.c index 927825f..2280c32 100644 --- a/drivers/gpu/drm/i915/intel_mocs.c +++ b/drivers/gpu/drm/i915/intel_mocs.c @@ -97,7 +97,8 @@ struct drm_i915_mocs_table { * end. */ static const struct drm_i915_mocs_entry skylake_mocs_table[] = { - { /* 0x00000009 */ + [I915_MOCS_UNCACHED] = { + /* 0x00000009 */ .control_value = LE_CACHEABILITY(LE_UC) | LE_TGT_CACHE(LE_TC_LLC_ELLC) | LE_LRUM(0) | LE_AOM(0) | LE_RSC(0) | LE_SCC(0) | @@ -106,7 +107,7 @@ static const struct drm_i915_mocs_entry skylake_mocs_table[] = { /* 0x0010 */ .l3cc_value = L3_ESC(0) | L3_SCC(0) | L3_CACHEABILITY(L3_UC), }, - { + [I915_MOCS_PTE] = { /* 0x00000038 */ .control_value = LE_CACHEABILITY(LE_PAGETABLE) | LE_TGT_CACHE(LE_TC_LLC_ELLC) | @@ -115,7 +116,7 @@ static const struct drm_i915_mocs_entry skylake_mocs_table[] = { /* 0x0030 */ .l3cc_value = L3_ESC(0) | L3_SCC(0) | L3_CACHEABILITY(L3_WB), }, - { + [I915_MOCS_CACHED] = { /* 0x0000003b */ .control_value = LE_CACHEABILITY(LE_WB) | LE_TGT_CACHE(LE_TC_LLC_ELLC) | @@ -128,7 +129,7 @@ static const struct drm_i915_mocs_entry skylake_mocs_table[] = { /* NOTE: the LE_TGT_CACHE is not used on Broxton */ static const struct drm_i915_mocs_entry broxton_mocs_table[] = { - { + [I915_MOCS_UNCACHED] = { /* 0x00000009 */ .control_value = LE_CACHEABILITY(LE_UC) | LE_TGT_CACHE(LE_TC_LLC_ELLC) | @@ -138,7 +139,7 @@ static const struct drm_i915_mocs_entry broxton_mocs_table[] = { /* 0x0010 */ .l3cc_value = L3_ESC(0) | L3_SCC(0) | L3_CACHEABILITY(L3_UC), }, - { + [I915_MOCS_PTE] = { /* 0x00000038 */ .control_value = LE_CACHEABILITY(LE_PAGETABLE) | LE_TGT_CACHE(LE_TC_LLC_ELLC) | @@ -148,7 +149,7 @@ static const struct drm_i915_mocs_entry broxton_mocs_table[] = { /* 0x0030 */ .l3cc_value = L3_ESC(0) | L3_SCC(0) | L3_CACHEABILITY(L3_WB), }, - { + [I915_MOCS_CACHED] = { /* 0x00000039 */ .control_value = LE_CACHEABILITY(LE_UC) | LE_TGT_CACHE(LE_TC_LLC_ELLC) | diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h index 51b9360..33ce5ff 100644 --- a/include/uapi/drm/i915_drm.h +++ b/include/uapi/drm/i915_drm.h @@ -62,6 +62,30 @@ extern "C" { #define I915_ERROR_UEVENT "ERROR" #define I915_RESET_UEVENT "RESET" +/* + * MOCS indexes used for GPU surfaces, defining the cacheability of the + * surface data and the coherency for this data wrt. CPU vs. GPU accesses. + */ +enum i915_mocs_table_index { + /* + * Not cached anywhere, coherency between CPU and GPU accesses is + * guaranteed. + */ + I915_MOCS_UNCACHED, + /* + * Cacheability and coherency controlled by the kernel automatically + * based on the DRM_I915_GEM_SET_CACHING IOCTL setting and the current + * usage of the surface (used for display scanout or not). + */ + I915_MOCS_PTE, + /* + * Cached in all GPU caches available on the platform. + * Coherency between CPU and GPU accesses to the surface is not + * guaranteed without extra synchronization. + */ + I915_MOCS_CACHED, +}; + /* Each region is a minimum of 16k, and there are at most 255 of them. */ #define I915_NR_TEX_REGIONS 255 /* table size 2k - maximum due to use |
