提交 c01fc532 编写于 作者: Z Zhi Wang 提交者: Chris Wilson

drm/i915: Make addressing mode bits in context descriptor configurable

Currently the addressing mode bit in context descriptor is statically
generated from the configuration of system-wide PPGTT usage model.

GVT-g will load the PPGTT shadow page table by itself and probably one
guest is using a different addressing mode with i915 host. The addressing
mode bits of a LRC context should be configurable under this case.

v10:

- Fix the identation. (Joonas)

v9:
- Rename the data member in struct i915_gem_context. (Chris)

v8:
- Rename the data member in struct i915_gem_context. (Chris)

v7:
- Move context addressing mode bit into i915_reg.h. (Joonas/Chris)
- Add prefix "INTEL_" for related definitions. (Joonas)

v6:
- Directly save the addressing mode bits inside i915_gem_context. (Chris)
- Move the LRC context addressing mode bits into intel_lrc.h. (Chris)

v5:
- Change USES_FULL_48BIT(dev) to USES_FULL_48BIT(dev_priv) (Tvrtko)

Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> (v9)
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Signed-off-by: NZhi Wang <zhi.a.wang@intel.com>
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/1466078825-6662-7-git-send-email-zhi.a.wang@intel.com
上级 bcd794c2
......@@ -881,6 +881,7 @@ struct i915_gem_context {
bool initialised;
} engine[I915_NUM_ENGINES];
u32 ring_size;
u32 desc_template;
struct list_head link;
......
......@@ -296,6 +296,8 @@ __create_hw_context(struct drm_device *dev,
ctx->hang_stats.ban_period_seconds = DRM_I915_CTX_BAN_PERIOD;
ctx->ring_size = 4 * PAGE_SIZE;
ctx->desc_template = GEN8_CTX_ADDRESSING_MODE(dev_priv) <<
GEN8_CTX_ADDRESSING_MODE_SHIFT;
return ctx;
......
......@@ -3051,6 +3051,18 @@ enum skl_disp_power_wells {
/* Same as Haswell, but 72064 bytes now. */
#define GEN8_CXT_TOTAL_SIZE (18 * PAGE_SIZE)
enum {
INTEL_ADVANCED_CONTEXT = 0,
INTEL_LEGACY_32B_CONTEXT,
INTEL_ADVANCED_AD_CONTEXT,
INTEL_LEGACY_64B_CONTEXT
};
#define GEN8_CTX_ADDRESSING_MODE_SHIFT 3
#define GEN8_CTX_ADDRESSING_MODE(dev_priv) (USES_FULL_48BIT_PPGTT(dev_priv) ?\
INTEL_LEGACY_64B_CONTEXT : \
INTEL_LEGACY_32B_CONTEXT)
#define CHV_CLK_CTL1 _MMIO(0x101100)
#define VLV_CLK_CTL2 _MMIO(0x101104)
#define CLK_CTL2_CZCOUNT_30NS_SHIFT 28
......
......@@ -207,16 +207,6 @@
reg_state[CTX_PDP0_LDW + 1] = lower_32_bits(px_dma(&ppgtt->pml4)); \
} while (0)
enum {
ADVANCED_CONTEXT = 0,
LEGACY_32B_CONTEXT,
ADVANCED_AD_CONTEXT,
LEGACY_64B_CONTEXT
};
#define GEN8_CTX_ADDRESSING_MODE_SHIFT 3
#define GEN8_CTX_ADDRESSING_MODE(dev) (USES_FULL_48BIT_PPGTT(dev) ?\
LEGACY_64B_CONTEXT :\
LEGACY_32B_CONTEXT)
enum {
FAULT_AND_HANG = 0,
FAULT_AND_HALT, /* Debug only */
......@@ -281,8 +271,6 @@ logical_ring_init_platform_invariants(struct intel_engine_cs *engine)
(engine->id == VCS || engine->id == VCS2);
engine->ctx_desc_template = GEN8_CTX_VALID;
engine->ctx_desc_template |= GEN8_CTX_ADDRESSING_MODE(dev_priv) <<
GEN8_CTX_ADDRESSING_MODE_SHIFT;
if (IS_GEN8(dev_priv))
engine->ctx_desc_template |= GEN8_CTX_L3LLC_COHERENT;
engine->ctx_desc_template |= GEN8_CTX_PRIVILEGE;
......@@ -325,7 +313,8 @@ intel_lr_context_descriptor_update(struct i915_gem_context *ctx,
BUILD_BUG_ON(MAX_CONTEXT_HW_ID > (1<<GEN8_CTX_ID_WIDTH));
desc = engine->ctx_desc_template; /* bits 0-11 */
desc = ctx->desc_template; /* bits 3-4 */
desc |= engine->ctx_desc_template; /* bits 0-11 */
desc |= ce->lrc_vma->node.start + LRC_PPHWSP_PN * PAGE_SIZE;
/* bits 12-31 */
desc |= (u64)ctx->hw_id << GEN8_CTX_ID_SHIFT; /* bits 32-52 */
......
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