[Intel-gfx] [RFC PATCH v2 4/5] drm/i915: Record the sseu configuration per-context & engine
Lionel Landwerlin
lionel.g.landwerlin at intel.com
Fri Sep 22 15:10:56 UTC 2017
From: Chris Wilson <chris at chris-wilson.co.uk>
We want to expose the ability to reconfigure the slices, subslice and
eu per context and per engine. To facilitate that, store the current
configuration on the context for each engine, which is initially set
to the device default upon creation.
v2: record sseu configuration per context & engine (Chris)
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
---
drivers/gpu/drm/i915/i915_drv.h | 19 -------------------
drivers/gpu/drm/i915/i915_gem_context.c | 6 ++++++
drivers/gpu/drm/i915/i915_gem_context.h | 21 +++++++++++++++++++++
drivers/gpu/drm/i915/intel_lrc.c | 23 +++++++++--------------
4 files changed, 36 insertions(+), 33 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 2902a0251484..b7ee84317f49 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -799,25 +799,6 @@ struct intel_csr {
func(supports_tv); \
func(has_ipc);
-struct sseu_dev_info {
- u8 slice_mask;
- u8 subslice_mask;
- u8 eu_total;
- u8 min_eu_per_subslice;
- u8 max_eu_per_subslice;
- u8 min_eu_in_pool;
- /* For each slice, which subslice(s) has(have) 7 EUs (bitfield)? */
- u8 subslice_7eu[3];
- u8 has_slice_pg:1;
- u8 has_subslice_pg:1;
- u8 has_eu_pg:1;
-};
-
-static inline unsigned int sseu_subslice_total(const struct sseu_dev_info *sseu)
-{
- return hweight8(sseu->slice_mask) * hweight8(sseu->subslice_mask);
-}
-
/* Keep in gen based order, and chronological order within a gen */
enum intel_platform {
INTEL_PLATFORM_UNINITIALIZED = 0,
diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
index 921ee369c74d..b386574259a1 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -257,6 +257,8 @@ __create_hw_context(struct drm_i915_private *dev_priv,
struct drm_i915_file_private *file_priv)
{
struct i915_gem_context *ctx;
+ struct intel_engine_cs *engine;
+ enum intel_engine_id id;
int ret;
ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
@@ -305,6 +307,10 @@ __create_hw_context(struct drm_i915_private *dev_priv,
* is no remap info, it will be a NOP. */
ctx->remap_slice = ALL_L3_SLICES(dev_priv);
+ /* On all engines, use the whole device by default */
+ for_each_engine(engine, dev_priv, id)
+ ctx->engine[id].sseu = INTEL_INFO(dev_priv)->sseu;
+
i915_gem_context_set_bannable(ctx);
ctx->ring_size = 4 * PAGE_SIZE;
ctx->desc_template =
diff --git a/drivers/gpu/drm/i915/i915_gem_context.h b/drivers/gpu/drm/i915/i915_gem_context.h
index 44688e22a5c2..727b3b5bced1 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.h
+++ b/drivers/gpu/drm/i915/i915_gem_context.h
@@ -40,6 +40,25 @@ struct i915_hw_ppgtt;
struct i915_vma;
struct intel_ring;
+struct sseu_dev_info {
+ u8 slice_mask;
+ u8 subslice_mask;
+ u8 eu_total;
+ u8 min_eu_per_subslice;
+ u8 max_eu_per_subslice;
+ u8 min_eu_in_pool;
+ /* For each slice, which subslice(s) has(have) 7 EUs (bitfield)? */
+ u8 subslice_7eu[3];
+ u8 has_slice_pg:1;
+ u8 has_subslice_pg:1;
+ u8 has_eu_pg:1;
+};
+
+static inline unsigned int sseu_subslice_total(const struct sseu_dev_info *sseu)
+{
+ return hweight8(sseu->slice_mask) * hweight8(sseu->subslice_mask);
+}
+
#define DEFAULT_CONTEXT_HANDLE 0
/**
@@ -158,6 +177,8 @@ struct i915_gem_context {
u64 lrc_desc;
int pin_count;
bool initialised;
+ /** sseu: Control eu/slice partitioning */
+ struct sseu_dev_info sseu;
} engine[I915_NUM_ENGINES];
/** ring_size: size for allocating the per-engine ring buffer */
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index 699398257c37..f5e9caf4913c 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -1889,8 +1889,7 @@ int logical_xcs_ring_init(struct intel_engine_cs *engine)
return logical_ring_init(engine);
}
-static u32
-make_rpcs(struct drm_i915_private *dev_priv)
+static u32 make_rpcs(const struct sseu_dev_info *sseu)
{
u32 rpcs = 0;
@@ -1900,25 +1899,21 @@ make_rpcs(struct drm_i915_private *dev_priv)
* must make an explicit request through RPCS for full
* enablement.
*/
- if (INTEL_INFO(dev_priv)->sseu.has_slice_pg) {
+ if (sseu->has_slice_pg) {
rpcs |= GEN8_RPCS_S_CNT_ENABLE;
- rpcs |= hweight8(INTEL_INFO(dev_priv)->sseu.slice_mask) <<
- GEN8_RPCS_S_CNT_SHIFT;
+ rpcs |= hweight8(sseu->slice_mask) << GEN8_RPCS_S_CNT_SHIFT;
rpcs |= GEN8_RPCS_ENABLE;
}
- if (INTEL_INFO(dev_priv)->sseu.has_subslice_pg) {
+ if (sseu->has_subslice_pg) {
rpcs |= GEN8_RPCS_SS_CNT_ENABLE;
- rpcs |= hweight8(INTEL_INFO(dev_priv)->sseu.subslice_mask) <<
- GEN8_RPCS_SS_CNT_SHIFT;
+ rpcs |= hweight8(sseu->subslice_mask) << GEN8_RPCS_SS_CNT_SHIFT;
rpcs |= GEN8_RPCS_ENABLE;
}
- if (INTEL_INFO(dev_priv)->sseu.has_eu_pg) {
- rpcs |= INTEL_INFO(dev_priv)->sseu.min_eu_per_subslice <<
- GEN8_RPCS_EU_MIN_SHIFT;
- rpcs |= INTEL_INFO(dev_priv)->sseu.max_eu_per_subslice <<
- GEN8_RPCS_EU_MAX_SHIFT;
+ if (sseu->has_eu_pg) {
+ rpcs |= sseu->min_eu_per_subslice << GEN8_RPCS_EU_MIN_SHIFT;
+ rpcs |= sseu->max_eu_per_subslice << GEN8_RPCS_EU_MAX_SHIFT;
rpcs |= GEN8_RPCS_ENABLE;
}
@@ -2032,7 +2027,7 @@ static void execlists_init_reg_state(u32 *regs,
if (rcs) {
regs[CTX_LRI_HEADER_2] = MI_LOAD_REGISTER_IMM(1);
CTX_REG(regs, CTX_R_PWR_CLK_STATE, GEN8_R_PWR_CLK_STATE,
- make_rpcs(dev_priv));
+ make_rpcs(&ctx->engine[engine->id].sseu));
i915_oa_init_reg_state(engine, ctx, regs);
}
--
2.14.1
More information about the Intel-gfx
mailing list