drm/i915: Sanitize engine context sizes
Pre-calculate engine context size based on engine class and device
generation and store it in the engine instance.
v2:
- Squash and get rid of hw_context_size (Chris)
v3:
- Move after MMIO init for probing on Gen7 and 8 (Chris)
- Retained rounding (Tvrtko)
v4:
- Rebase for deferred legacy context allocation
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Oscar Mateo <oscar.mateo@intel.com>
Cc: Zhenyu Wang <zhenyuw@linux.intel.com>
Cc: intel-gvt-dev@lists.freedesktop.org
Acked-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index 5ec064a..0909549 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -138,10 +138,6 @@
#include "i915_drv.h"
#include "intel_mocs.h"
-#define GEN9_LR_CONTEXT_RENDER_SIZE (22 * PAGE_SIZE)
-#define GEN8_LR_CONTEXT_RENDER_SIZE (20 * PAGE_SIZE)
-#define GEN8_LR_CONTEXT_OTHER_SIZE (2 * PAGE_SIZE)
-
#define RING_EXECLIST_QFULL (1 << 0x2)
#define RING_EXECLIST1_VALID (1 << 0x3)
#define RING_EXECLIST0_VALID (1 << 0x4)
@@ -1918,53 +1914,6 @@
return 0;
}
-/**
- * intel_lr_context_size() - return the size of the context for an engine
- * @engine: which engine to find the context size for
- *
- * Each engine may require a different amount of space for a context image,
- * so when allocating (or copying) an image, this function can be used to
- * find the right size for the specific engine.
- *
- * Return: size (in bytes) of an engine-specific context image
- *
- * Note: this size includes the HWSP, which is part of the context image
- * in LRC mode, but does not include the "shared data page" used with
- * GuC submission. The caller should account for this if using the GuC.
- */
-uint32_t intel_lr_context_size(struct intel_engine_cs *engine)
-{
- struct drm_i915_private *dev_priv = engine->i915;
- int ret;
-
- WARN_ON(INTEL_GEN(dev_priv) < 8);
-
- switch (engine->class) {
- case RENDER_CLASS:
- switch (INTEL_GEN(dev_priv)) {
- default:
- MISSING_CASE(INTEL_GEN(dev_priv));
- case 9:
- ret = GEN9_LR_CONTEXT_RENDER_SIZE;
- break;
- case 8:
- ret = GEN8_LR_CONTEXT_RENDER_SIZE;
- break;
- }
- break;
-
- default:
- MISSING_CASE(engine->class);
- case VIDEO_DECODE_CLASS:
- case VIDEO_ENHANCEMENT_CLASS:
- case COPY_ENGINE_CLASS:
- ret = GEN8_LR_CONTEXT_OTHER_SIZE;
- break;
- }
-
- return ret;
-}
-
static int execlists_context_deferred_alloc(struct i915_gem_context *ctx,
struct intel_engine_cs *engine)
{
@@ -1977,8 +1926,7 @@
WARN_ON(ce->state);
- context_size = round_up(intel_lr_context_size(engine),
- I915_GTT_PAGE_SIZE);
+ context_size = round_up(engine->context_size, I915_GTT_PAGE_SIZE);
/* One extra page as the sharing data between driver and GuC */
context_size += PAGE_SIZE * LRC_PPHWSP_PN;