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| author | Yan Zhao <yan.y.zhao@intel.com> | 2020-04-15 06:58:27 +0300 |
|---|---|---|
| committer | Zhenyu Wang <zhenyuw@linux.intel.com> | 2020-04-15 09:02:55 +0300 |
| commit | e5e113079efdffb9a39e16a88d109c3d47efdfcc (patch) | |
| tree | 40b2d8b4f0cbb6d0a8f3ea0d388ad53665e3b30a /drivers/gpu | |
| parent | 6c2f73e26a253ae827d9754572bfee4a912e559c (diff) | |
| download | linux-e5e113079efdffb9a39e16a88d109c3d47efdfcc.tar.xz | |
drm/i915/gvt: combine access to consecutive guest context pages
IOVA(GPA)s of context pages are checked and if they are consecutive,
read/write them together in one intel_gvt_hypervisor_read_gpa() /
intel_gvt_hypervisor_write_gpa().
Signed-off-by: Yan Zhao <yan.y.zhao@intel.com>
Reviewed-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20200415035827.26476-1-yan.y.zhao@intel.com
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/i915/gvt/scheduler.c | 58 |
1 files changed, 48 insertions, 10 deletions
diff --git a/drivers/gpu/drm/i915/gvt/scheduler.c b/drivers/gpu/drm/i915/gvt/scheduler.c index 4639a56f9a3c..f650ad3367b6 100644 --- a/drivers/gpu/drm/i915/gvt/scheduler.c +++ b/drivers/gpu/drm/i915/gvt/scheduler.c @@ -133,6 +133,8 @@ static int populate_shadow_context(struct intel_vgpu_workload *workload) void *dst; void *context_base; unsigned long context_gpa, context_page_num; + unsigned long gpa_base; /* first gpa of consecutive GPAs */ + unsigned long gpa_size; /* size of consecutive GPAs */ int i; GEM_BUG_ON(!intel_context_is_pinned(ctx)); @@ -186,8 +188,11 @@ static int populate_shadow_context(struct intel_vgpu_workload *workload) if (IS_BROADWELL(gvt->gt->i915) && workload->engine->id == RCS0) context_page_num = 19; - i = 2; - while (i < context_page_num) { + /* find consecutive GPAs from gma until the first inconsecutive GPA. + * read from the continuous GPAs into dst virtual address + */ + gpa_size = 0; + for (i = 2; i < context_page_num; i++) { context_gpa = intel_vgpu_gma_to_gpa(vgpu->gtt.ggtt_mm, (u32)((workload->ctx_desc.lrca + i) << I915_GTT_PAGE_SHIFT)); @@ -196,10 +201,24 @@ static int populate_shadow_context(struct intel_vgpu_workload *workload) return -EFAULT; } + if (gpa_size == 0) { + gpa_base = context_gpa; + dst = context_base + (i << I915_GTT_PAGE_SHIFT); + } else if (context_gpa != gpa_base + gpa_size) + goto read; + + gpa_size += I915_GTT_PAGE_SIZE; + + if (i == context_page_num - 1) + goto read; + + continue; + +read: + intel_gvt_hypervisor_read_gpa(vgpu, gpa_base, dst, gpa_size); + gpa_base = context_gpa; + gpa_size = I915_GTT_PAGE_SIZE; dst = context_base + (i << I915_GTT_PAGE_SHIFT); - intel_gvt_hypervisor_read_gpa(vgpu, context_gpa, dst, - I915_GTT_PAGE_SIZE); - i++; } return 0; } @@ -789,6 +808,8 @@ static void update_guest_context(struct intel_vgpu_workload *workload) void *context_base; void *src; unsigned long context_gpa, context_page_num; + unsigned long gpa_base; /* first gpa of consecutive GPAs */ + unsigned long gpa_size; /* size of consecutive GPAs*/ int i; u32 ring_base; u32 head, tail; @@ -822,11 +843,14 @@ static void update_guest_context(struct intel_vgpu_workload *workload) if (IS_BROADWELL(rq->i915) && rq->engine->id == RCS0) context_page_num = 19; - i = 2; context_base = (void *) ctx->lrc_reg_state - (LRC_STATE_PN << I915_GTT_PAGE_SHIFT); - while (i < context_page_num) { + /* find consecutive GPAs from gma until the first inconsecutive GPA. + * write to the consecutive GPAs from src virtual address + */ + gpa_size = 0; + for (i = 2; i < context_page_num; i++) { context_gpa = intel_vgpu_gma_to_gpa(vgpu->gtt.ggtt_mm, (u32)((workload->ctx_desc.lrca + i) << I915_GTT_PAGE_SHIFT)); @@ -835,10 +859,24 @@ static void update_guest_context(struct intel_vgpu_workload *workload) return; } + if (gpa_size == 0) { + gpa_base = context_gpa; + src = context_base + (i << I915_GTT_PAGE_SHIFT); + } else if (context_gpa != gpa_base + gpa_size) + goto write; + + gpa_size += I915_GTT_PAGE_SIZE; + + if (i == context_page_num - 1) + goto write; + + continue; + +write: + intel_gvt_hypervisor_write_gpa(vgpu, gpa_base, src, gpa_size); + gpa_base = context_gpa; + gpa_size = I915_GTT_PAGE_SIZE; src = context_base + (i << I915_GTT_PAGE_SHIFT); - intel_gvt_hypervisor_write_gpa(vgpu, context_gpa, src, - I915_GTT_PAGE_SIZE); - i++; } intel_gvt_hypervisor_write_gpa(vgpu, workload->ring_context_gpa + |