diff options
| author | Michel Thierry <michel.thierry@intel.com> | 2017-09-13 11:56:00 +0300 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2017-09-13 17:02:15 +0300 |
| commit | 0b29c75a01e5413d9c1f368b8357b589c7b5a922 (patch) | |
| tree | 5d21d972f22b0601ad732bad9935a08f5859a9a6 /drivers/gpu/drm/i915/intel_lrc.c | |
| parent | 7ce5b6850b47824a2b8d0a17b5fe75f9942e5cd1 (diff) | |
| download | linux-0b29c75a01e5413d9c1f368b8357b589c7b5a922.tar.xz | |
drm/i915/lrc: Clarify the format of the context image
Not only the context image consist of two parts (the PPHWSP, and the
logical context state), but we also allocate a header at the start of
for sharing data with GuC. Thus every lrc looks like this:
| [guc] | [hwsp] [logical state] |
|<- our header ->|<- context image ->|
So far, we have oversimplified whenever we use each of these parts of the
context, just because the GuC header happens to be in page 0, and the
(PP)HWSP is in page 1. But this had led to using the same define for more
than one meaning (as a page index in the lrc and as 1 page).
This patch adds defines for the GuC shared page, the PPHWSP page and the
start of the logical state. It also updated the places where the old
define was being used. Since we are not changing the size (or format) of
the context, there are no functional changes.
v2: Use PPHWSP index for hws again.
Suggested-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Michel Thierry <michel.thierry@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Oscar Mateo <oscar.mateo@intel.com>
Cc: intel-gvt-dev@lists.freedesktop.org
Link: http://patchwork.freedesktop.org/patch/msgid/20170712193032.27080-1-michel.thierry@intel.com
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20170913085605.18299-1-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/intel_lrc.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_lrc.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c index 9e4342b8e52b..3b8f1a79d640 100644 --- a/drivers/gpu/drm/i915/intel_lrc.c +++ b/drivers/gpu/drm/i915/intel_lrc.c @@ -279,7 +279,7 @@ intel_lr_context_descriptor_update(struct i915_gem_context *ctx, BUILD_BUG_ON(MAX_CONTEXT_HW_ID > (1<<GEN8_CTX_ID_WIDTH)); desc = ctx->desc_template; /* bits 0-11 */ - desc |= i915_ggtt_offset(ce->state) + LRC_PPHWSP_PN * PAGE_SIZE; + desc |= i915_ggtt_offset(ce->state) + LRC_HEADER_PAGES * PAGE_SIZE; /* bits 12-31 */ desc |= (u64)ctx->hw_id << GEN8_CTX_ID_SHIFT; /* bits 32-52 */ @@ -2048,8 +2048,11 @@ static int execlists_context_deferred_alloc(struct i915_gem_context *ctx, 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; + /* + * Before the actual start of the context image, we insert a few pages + * for our own use and for sharing with the GuC. + */ + context_size += LRC_HEADER_PAGES * PAGE_SIZE; ctx_obj = i915_gem_object_create(ctx->i915, context_size); if (IS_ERR(ctx_obj)) { |