diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_reg.h | 23 |
1 files changed, 15 insertions, 8 deletions
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index c4c5098..76d965c 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -1705,15 +1705,26 @@ */ #define CCID 0x2180 #define CCID_EN (1<<0) +/* + * Notes on SNB/IVB/VLV context size: + * - Power context is saved elsewhere (LLC or stolen) + * - Ring/execlist context is saved on SNB, not on IVB + * - Extended context size already includes render context size + * - We always need to follow the extended context size. + * SNB BSpec has comments indicating that we should use the + * render context size instead if execlists are disabled, but + * based on empirical testing that's just nonsense. + * - Pipelined/VF state is saved on SNB/IVB respectively + * - GT1 size just indicates how much of render context + * doesn't need saving on GT1 + */ #define CXT_SIZE 0x21a0 #define GEN6_CXT_POWER_SIZE(cxt_reg) ((cxt_reg >> 24) & 0x3f) #define GEN6_CXT_RING_SIZE(cxt_reg) ((cxt_reg >> 18) & 0x3f) #define GEN6_CXT_RENDER_SIZE(cxt_reg) ((cxt_reg >> 12) & 0x3f) #define GEN6_CXT_EXTENDED_SIZE(cxt_reg) ((cxt_reg >> 6) & 0x3f) #define GEN6_CXT_PIPELINE_SIZE(cxt_reg) ((cxt_reg >> 0) & 0x3f) -#define GEN6_CXT_TOTAL_SIZE(cxt_reg) (GEN6_CXT_POWER_SIZE(cxt_reg) + \ - GEN6_CXT_RING_SIZE(cxt_reg) + \ - GEN6_CXT_RENDER_SIZE(cxt_reg) + \ +#define GEN6_CXT_TOTAL_SIZE(cxt_reg) (GEN6_CXT_RING_SIZE(cxt_reg) + \ GEN6_CXT_EXTENDED_SIZE(cxt_reg) + \ GEN6_CXT_PIPELINE_SIZE(cxt_reg)) #define GEN7_CXT_SIZE 0x21a8 @@ -1723,11 +1734,7 @@ #define GEN7_CXT_EXTENDED_SIZE(ctx_reg) ((ctx_reg >> 9) & 0x7f) #define GEN7_CXT_GT1_SIZE(ctx_reg) ((ctx_reg >> 6) & 0x7) #define GEN7_CXT_VFSTATE_SIZE(ctx_reg) ((ctx_reg >> 0) & 0x3f) -#define GEN7_CXT_TOTAL_SIZE(ctx_reg) (GEN7_CXT_POWER_SIZE(ctx_reg) + \ - GEN7_CXT_RING_SIZE(ctx_reg) + \ - GEN7_CXT_RENDER_SIZE(ctx_reg) + \ - GEN7_CXT_EXTENDED_SIZE(ctx_reg) + \ - GEN7_CXT_GT1_SIZE(ctx_reg) + \ +#define GEN7_CXT_TOTAL_SIZE(ctx_reg) (GEN7_CXT_EXTENDED_SIZE(ctx_reg) + \ GEN7_CXT_VFSTATE_SIZE(ctx_reg)) /* Haswell does have the CXT_SIZE register however it does not appear to be * valid. Now, docs explain in dwords what is in the context object. The full |