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

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);