Set subslice mask according to the per-context sseu value.

Fixes intel#267.
zxye · Dec 25, 2018 · 796341b · 796341b
1 parent 5546a12
commit 796341b
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diff --git a/media_driver/linux/common/os/i915/include/mos_bufmgr.h b/media_driver/linux/common/os/i915/include/mos_bufmgr.h
@@ -322,6 +322,16 @@ int mos_set_context_param(struct mos_linux_context *ctx,
 
 int mos_get_subslice_total(int fd, unsigned int *subslice_total);
 int mos_get_eu_total(int fd, unsigned int *eu_total);
+
+int mos_get_context_param_sseu(struct mos_linux_context *ctx,
+                struct drm_i915_gem_context_param_sseu *sseu);
+int mos_set_context_param_sseu(struct mos_linux_context *ctx,
+                struct drm_i915_gem_context_param_sseu sseu);
+int mos_get_subslice_mask(int fd, unsigned int *subslice_mask);
+int mos_get_slice_mask(int fd, unsigned int *slice_mask);
+uint8_t mos_switch_off_n_bits(uint8_t in_mask, int n);
+unsigned int mos_hweight8(uint8_t w);
+
 #if defined(__cplusplus)
 extern "C" {
 #endif

diff --git a/media_driver/linux/common/os/i915/mos_bufmgr.c b/media_driver/linux/common/os/i915/mos_bufmgr.c
@@ -4181,6 +4181,124 @@ int mos_get_slice_mask(uint32_t slice_count)
     return bitmask;
 }
 
+unsigned int mos_hweight8(uint8_t w)
+{
+    uint32_t i, weight = 0;
+
+    for (i=0; i<8; i++)
+    {
+        weight += !!((w) & (1UL << i));
+    }
+    return weight;
+}
+
+uint8_t mos_switch_off_n_bits(uint8_t in_mask, int n)
+{
+    int i,count;
+    uint8_t bi,out_mask;
+
+    assert (n>0 && n<=8);
+
+    out_mask = in_mask;
+    count = n;
+    for(i=0; i<8; i++)
+    {
+        bi = 1UL<<i;
+        if (bi & in_mask)
+        {
+            out_mask &= ~bi;
+            count--;
+        }
+        if (count==0)
+        {
+            break;
+        }
+    }
+    return out_mask;
+}
+
+int
+mos_get_context_param_sseu(struct mos_linux_context *ctx,
+                struct drm_i915_gem_context_param_sseu *sseu)
+{
+    struct mos_bufmgr_gem *bufmgr_gem;
+    struct drm_i915_gem_context_param context_param;
+    int ret;
+
+    if (ctx == nullptr)
+        return -EINVAL;
+
+    bufmgr_gem = (struct mos_bufmgr_gem *)ctx->bufmgr;
+    memset(&context_param, 0, sizeof(context_param));
+    context_param.ctx_id = ctx->ctx_id;
+    context_param.param = I915_CONTEXT_PARAM_SSEU;
+    context_param.value = (uint64_t) sseu;
+    context_param.size = sizeof(struct drm_i915_gem_context_param_sseu);
+
+    ret = drmIoctl(bufmgr_gem->fd,
+            DRM_IOCTL_I915_GEM_CONTEXT_GETPARAM,
+            &context_param);
+
+    return ret;
+}
+
+int
+mos_set_context_param_sseu(struct mos_linux_context *ctx,
+                struct drm_i915_gem_context_param_sseu sseu)
+{
+    struct mos_bufmgr_gem *bufmgr_gem;
+    struct drm_i915_gem_context_param context_param;
+    int ret;
+
+    if (ctx == nullptr)
+        return -EINVAL;
+
+    bufmgr_gem = (struct mos_bufmgr_gem *)ctx->bufmgr;
+    memset(&context_param, 0, sizeof(context_param));
+    context_param.ctx_id = ctx->ctx_id;
+    context_param.param = I915_CONTEXT_PARAM_SSEU;
+    context_param.value = (uint64_t) &sseu;
+    context_param.size = sizeof(struct drm_i915_gem_context_param_sseu);
+
+    ret = drmIoctl(bufmgr_gem->fd,
+               DRM_IOCTL_I915_GEM_CONTEXT_SETPARAM,
+               &context_param);
+
+    return ret;
+}
+
+int
+mos_get_subslice_mask(int fd, unsigned int *subslice_mask)
+{
+    drm_i915_getparam_t gp;
+    int ret;
+
+    memclear(gp);
+    gp.value = (int*)subslice_mask;
+    gp.param = I915_PARAM_SUBSLICE_MASK;
+    ret = drmIoctl(fd, DRM_IOCTL_I915_GETPARAM, &gp);
+    if (ret)
+        return -errno;
+
+    return 0;
+}
+
+int
+mos_get_slice_mask(int fd, unsigned int *slice_mask)
+{
+    drm_i915_getparam_t gp;
+    int ret;
+
+    memclear(gp);
+    gp.value = (int*)slice_mask;
+    gp.param = I915_PARAM_SLICE_MASK;
+    ret = drmIoctl(fd, DRM_IOCTL_I915_GETPARAM, &gp);
+    if (ret)
+        return -errno;
+
+    return 0;
+}
+
 int
 mos_get_context_param(struct mos_linux_context *ctx,
                 uint32_t size,

diff --git a/media_driver/linux/common/os/mos_os_specific.c b/media_driver/linux/common/os/mos_os_specific.c
@@ -4075,6 +4075,33 @@ MOS_STATUS Mos_Specific_CreateGpuContext(
             pOsContextSpecific->SetGpuContextHandle(mosGpuCxt, gpuContextSpecific->GetGpuContextHandle());
         }
 
+        MOS_OS_CHK_NULL_RETURN(createOption);
+        if (GpuNode == MOS_GPU_NODE_3D && createOption->SSEUValue != 0)
+        {
+            struct drm_i915_gem_context_param_sseu sseu;
+            MOS_ZeroMemory(&sseu, sizeof(sseu));
+            sseu.engine_class = I915_ENGINE_CLASS_RENDER;
+            sseu.instance = 0;
+
+            if (mos_get_context_param_sseu(pOsInterface->pOsContext->intel_context, &sseu))
+            {
+                MOS_OS_ASSERTMESSAGE("Failed to get sseu configuration.");
+                return MOS_STATUS_UNKNOWN;
+            };
+
+            if (mos_hweight8(sseu.subslice_mask) > createOption->packed.SubSliceCount)
+            {
+                sseu.subslice_mask = mos_switch_off_n_bits(sseu.subslice_mask,
+                        mos_hweight8(sseu.subslice_mask)-createOption->packed.SubSliceCount);
+            }
+
+            if (mos_set_context_param_sseu(pOsInterface->pOsContext->intel_context, sseu))
+            {
+                MOS_OS_ASSERTMESSAGE("Failed to set sseu configuration.");
+                return MOS_STATUS_UNKNOWN;
+            };
+        }
+
         return MOS_STATUS_SUCCESS;
     }