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drm/i915: use mock device info for creating mock device

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Instead of modifying the device info on the fly, use static const mock
device info.

It's not okay to modify device info at runtime; we've added separate
runtime info for info that needs to be modified at runtime. We've added
safeguards to device info to prevent it from being modified, but commit
5e352e32ae ("drm/i915: preparation for using PAT index") just cast the
const away and modified it anyway. This prevents device info from being
moved to rodata.

Fixes: 5e352e32ae ("drm/i915: preparation for using PAT index")
Suggested-by: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: Fei Yang <fei.yang@intel.com>
Cc: Andi Shyti <andi.shyti@linux.intel.com>
Cc: Andrzej Hajda <andrzej.hajda@intel.com>
Cc: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Reviewed-by: Andrzej Hajda <andrzej.hajda@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/b0db62045a96a3fd4cf123685da88cc777f9b485.1687878757.git.jani.nikula@intel.com
This commit is contained in:
Jani Nikula 2023-06-27 18:13:58 +03:00
parent 9124f2b7ff
commit ecc7a3ce07
1 changed files with 24 additions and 21 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

45
drivers/gpu/drm/i915/selftests/mock_gem_device.c
View file

@ -118,15 +118,31 @@ static void mock_gt_probe(struct drm_i915_private *i915)
i915->gt[0]->name = "Mock GT";
}
static const struct intel_device_info mock_info = {
.__runtime.graphics.ip.ver = -1,
.__runtime.page_sizes = (I915_GTT_PAGE_SIZE_4K |
I915_GTT_PAGE_SIZE_64K |
I915_GTT_PAGE_SIZE_2M),
.__runtime.memory_regions = REGION_SMEM,
.__runtime.platform_engine_mask = BIT(0),
/* simply use legacy cache level for mock device */
.max_pat_index = 3,
.cachelevel_to_pat = {
[I915_CACHE_NONE] = 0,
[I915_CACHE_LLC] = 1,
[I915_CACHE_L3_LLC] = 2,
[I915_CACHE_WT] = 3,
},
};
struct drm_i915_private *mock_gem_device(void)
{
#if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU)
static struct dev_iommu fake_iommu = { .priv = (void *)-1 };
#endif
struct drm_i915_private *i915;
struct intel_device_info *i915_info;
struct pci_dev *pdev;
unsigned int i;
int ret;
pdev = kzalloc(sizeof(*pdev), GFP_KERNEL);
@ -159,15 +175,18 @@ struct drm_i915_private *mock_gem_device(void)
pci_set_drvdata(pdev, i915);
/* Device parameters start as a copy of module parameters. */
i915_params_copy(&i915->params, &i915_modparams);
/* Set up device info and initial runtime info. */
intel_device_info_driver_create(i915, pdev->device, &mock_info);
dev_pm_domain_set(&pdev->dev, &pm_domain);
pm_runtime_enable(&pdev->dev);
pm_runtime_dont_use_autosuspend(&pdev->dev);
if (pm_runtime_enabled(&pdev->dev))
WARN_ON(pm_runtime_get_sync(&pdev->dev));
i915_params_copy(&i915->params, &i915_modparams);
intel_runtime_pm_init_early(&i915->runtime_pm);
/* wakeref tracking has significant overhead */
i915->runtime_pm.no_wakeref_tracking = true;
@ -175,21 +194,6 @@ struct drm_i915_private *mock_gem_device(void)
/* Using the global GTT may ask questions about KMS users, so prepare */
drm_mode_config_init(&i915->drm);
RUNTIME_INFO(i915)->graphics.ip.ver = -1;
RUNTIME_INFO(i915)->page_sizes =
I915_GTT_PAGE_SIZE_4K |
I915_GTT_PAGE_SIZE_64K |
I915_GTT_PAGE_SIZE_2M;
RUNTIME_INFO(i915)->memory_regions = REGION_SMEM;
/* simply use legacy cache level for mock device */
i915_info = (struct intel_device_info *)INTEL_INFO(i915);
i915_info->max_pat_index = 3;
for (i = 0; i < I915_MAX_CACHE_LEVEL; i++)
i915_info->cachelevel_to_pat[i] = i;
intel_memory_regions_hw_probe(i915);
spin_lock_init(&i915->gpu_error.lock);
@ -223,7 +227,6 @@ struct drm_i915_private *mock_gem_device(void)
mock_init_ggtt(to_gt(i915));
to_gt(i915)->vm = i915_vm_get(&to_gt(i915)->ggtt->vm);
RUNTIME_INFO(i915)->platform_engine_mask = BIT(0);
to_gt(i915)->info.engine_mask = BIT(0);
to_gt(i915)->engine[RCS0] = mock_engine(i915, "mock", RCS0);