[Intel-gfx] [PATCH] drm/i915: Kill the fake lmem support
Lucas De Marchi
lucas.demarchi at intel.com
Wed Feb 16 23:18:49 UTC 2022
This was useful for early development of lmem, but it's not used
anymore, so remove it.
Cc: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Matthew Auld <matthew.auld at intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>
---
drivers/gpu/drm/i915/Kconfig.unstable | 8 --
drivers/gpu/drm/i915/gt/intel_gt.c | 2 -
drivers/gpu/drm/i915/gt/intel_region_lmem.c | 112 +-------------------
drivers/gpu/drm/i915/gt/intel_region_lmem.h | 3 -
drivers/gpu/drm/i915/i915_driver.c | 15 ---
drivers/gpu/drm/i915/i915_params.c | 5 -
drivers/gpu/drm/i915/i915_params.h | 1 -
7 files changed, 2 insertions(+), 144 deletions(-)
diff --git a/drivers/gpu/drm/i915/Kconfig.unstable b/drivers/gpu/drm/i915/Kconfig.unstable
index 0c2276155c2b..cf151a297ed7 100644
--- a/drivers/gpu/drm/i915/Kconfig.unstable
+++ b/drivers/gpu/drm/i915/Kconfig.unstable
@@ -19,11 +19,3 @@ config DRM_I915_UNSTABLE
Recommended for driver developers _only_.
If in the slightest bit of doubt, say "N".
-
-config DRM_I915_UNSTABLE_FAKE_LMEM
- bool "Enable the experimental fake lmem"
- depends on DRM_I915_UNSTABLE
- default n
- help
- Convert some system memory into a fake local memory region for
- testing.
diff --git a/drivers/gpu/drm/i915/gt/intel_gt.c b/drivers/gpu/drm/i915/gt/intel_gt.c
index e8403fa53909..325ac15439eb 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt.c
+++ b/drivers/gpu/drm/i915/gt/intel_gt.c
@@ -65,8 +65,6 @@ int intel_gt_probe_lmem(struct intel_gt *gt)
int err;
mem = intel_gt_setup_lmem(gt);
- if (mem == ERR_PTR(-ENODEV))
- mem = intel_gt_setup_fake_lmem(gt);
if (IS_ERR(mem)) {
err = PTR_ERR(mem);
if (err == -ENODEV)
diff --git a/drivers/gpu/drm/i915/gt/intel_region_lmem.c b/drivers/gpu/drm/i915/gt/intel_region_lmem.c
index cb3f66707b21..df3856e09598 100644
--- a/drivers/gpu/drm/i915/gt/intel_region_lmem.c
+++ b/drivers/gpu/drm/i915/gt/intel_region_lmem.c
@@ -13,60 +13,6 @@
#include "gem/i915_gem_ttm.h"
#include "gt/intel_gt.h"
-static int init_fake_lmem_bar(struct intel_memory_region *mem)
-{
- struct drm_i915_private *i915 = mem->i915;
- struct i915_ggtt *ggtt = to_gt(i915)->ggtt;
- unsigned long n;
- int ret;
-
- /* We want to 1:1 map the mappable aperture to our reserved region */
-
- mem->fake_mappable.start = 0;
- mem->fake_mappable.size = resource_size(&mem->region);
- mem->fake_mappable.color = I915_COLOR_UNEVICTABLE;
-
- ret = drm_mm_reserve_node(&ggtt->vm.mm, &mem->fake_mappable);
- if (ret)
- return ret;
-
- mem->remap_addr = dma_map_resource(i915->drm.dev,
- mem->region.start,
- mem->fake_mappable.size,
- DMA_BIDIRECTIONAL,
- DMA_ATTR_FORCE_CONTIGUOUS);
- if (dma_mapping_error(i915->drm.dev, mem->remap_addr)) {
- drm_mm_remove_node(&mem->fake_mappable);
- return -EINVAL;
- }
-
- for (n = 0; n < mem->fake_mappable.size >> PAGE_SHIFT; ++n) {
- ggtt->vm.insert_page(&ggtt->vm,
- mem->remap_addr + (n << PAGE_SHIFT),
- n << PAGE_SHIFT,
- I915_CACHE_NONE, 0);
- }
-
- mem->region = (struct resource)DEFINE_RES_MEM(mem->remap_addr,
- mem->fake_mappable.size);
-
- return 0;
-}
-
-static void release_fake_lmem_bar(struct intel_memory_region *mem)
-{
- if (!drm_mm_node_allocated(&mem->fake_mappable))
- return;
-
- drm_mm_remove_node(&mem->fake_mappable);
-
- dma_unmap_resource(mem->i915->drm.dev,
- mem->remap_addr,
- mem->fake_mappable.size,
- DMA_BIDIRECTIONAL,
- DMA_ATTR_FORCE_CONTIGUOUS);
-}
-
static int
region_lmem_release(struct intel_memory_region *mem)
{
@@ -74,7 +20,6 @@ region_lmem_release(struct intel_memory_region *mem)
ret = intel_region_ttm_fini(mem);
io_mapping_fini(&mem->iomap);
- release_fake_lmem_bar(mem);
return ret;
}
@@ -84,17 +29,10 @@ region_lmem_init(struct intel_memory_region *mem)
{
int ret;
- if (mem->i915->params.fake_lmem_start) {
- ret = init_fake_lmem_bar(mem);
- GEM_BUG_ON(ret);
- }
-
if (!io_mapping_init_wc(&mem->iomap,
mem->io_start,
- resource_size(&mem->region))) {
- ret = -EIO;
- goto out_no_io;
- }
+ resource_size(&mem->region)))
+ return -EIO;
ret = intel_region_ttm_init(mem);
if (ret)
@@ -104,8 +42,6 @@ region_lmem_init(struct intel_memory_region *mem)
out_no_buddy:
io_mapping_fini(&mem->iomap);
-out_no_io:
- release_fake_lmem_bar(mem);
return ret;
}
@@ -116,50 +52,6 @@ static const struct intel_memory_region_ops intel_region_lmem_ops = {
.init_object = __i915_gem_ttm_object_init,
};
-struct intel_memory_region *
-intel_gt_setup_fake_lmem(struct intel_gt *gt)
-{
- struct drm_i915_private *i915 = gt->i915;
- struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
- struct intel_memory_region *mem;
- resource_size_t mappable_end;
- resource_size_t io_start;
- resource_size_t start;
-
- if (!HAS_LMEM(i915))
- return ERR_PTR(-ENODEV);
-
- if (!i915->params.fake_lmem_start)
- return ERR_PTR(-ENODEV);
-
- GEM_BUG_ON(i915_ggtt_has_aperture(to_gt(i915)->ggtt));
-
- /* Your mappable aperture belongs to me now! */
- mappable_end = pci_resource_len(pdev, 2);
- io_start = pci_resource_start(pdev, 2);
- start = i915->params.fake_lmem_start;
-
- mem = intel_memory_region_create(i915,
- start,
- mappable_end,
- PAGE_SIZE,
- io_start,
- INTEL_MEMORY_LOCAL,
- 0,
- &intel_region_lmem_ops);
- if (!IS_ERR(mem)) {
- drm_info(&i915->drm, "Intel graphics fake LMEM: %pR\n",
- &mem->region);
- drm_info(&i915->drm,
- "Intel graphics fake LMEM IO start: %llx\n",
- (u64)mem->io_start);
- drm_info(&i915->drm, "Intel graphics fake LMEM size: %llx\n",
- (u64)resource_size(&mem->region));
- }
-
- return mem;
-}
-
static bool get_legacy_lowmem_region(struct intel_uncore *uncore,
u64 *start, u32 *size)
{
diff --git a/drivers/gpu/drm/i915/gt/intel_region_lmem.h b/drivers/gpu/drm/i915/gt/intel_region_lmem.h
index 062d0542ae34..1438576b527a 100644
--- a/drivers/gpu/drm/i915/gt/intel_region_lmem.h
+++ b/drivers/gpu/drm/i915/gt/intel_region_lmem.h
@@ -10,7 +10,4 @@ struct intel_gt;
struct intel_memory_region *intel_gt_setup_lmem(struct intel_gt *gt);
-struct intel_memory_region *
-intel_gt_setup_fake_lmem(struct intel_gt *gt);
-
#endif /* !__INTEL_REGION_LMEM_H */
diff --git a/drivers/gpu/drm/i915/i915_driver.c b/drivers/gpu/drm/i915/i915_driver.c
index 1c67ff735f18..62b3f332bbf5 100644
--- a/drivers/gpu/drm/i915/i915_driver.c
+++ b/drivers/gpu/drm/i915/i915_driver.c
@@ -835,21 +835,6 @@ int i915_driver_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
if (!i915->params.nuclear_pageflip && match_info->graphics.ver < 5)
i915->drm.driver_features &= ~DRIVER_ATOMIC;
- /*
- * Check if we support fake LMEM -- for now we only unleash this for
- * the live selftests(test-and-exit).
- */
-#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
- if (IS_ENABLED(CONFIG_DRM_I915_UNSTABLE_FAKE_LMEM)) {
- if (GRAPHICS_VER(i915) >= 9 && i915_selftest.live < 0 &&
- i915->params.fake_lmem_start) {
- mkwrite_device_info(i915)->memory_regions =
- REGION_SMEM | REGION_LMEM | REGION_STOLEN_SMEM;
- GEM_BUG_ON(!HAS_LMEM(i915));
- }
- }
-#endif
-
ret = pci_enable_device(pdev);
if (ret)
goto out_fini;
diff --git a/drivers/gpu/drm/i915/i915_params.c b/drivers/gpu/drm/i915/i915_params.c
index 525ae832aa9a..eea355c2fc28 100644
--- a/drivers/gpu/drm/i915/i915_params.c
+++ b/drivers/gpu/drm/i915/i915_params.c
@@ -195,11 +195,6 @@ i915_param_named(enable_gvt, bool, 0400,
"Enable support for Intel GVT-g graphics virtualization host support(default:false)");
#endif
-#if IS_ENABLED(CONFIG_DRM_I915_UNSTABLE_FAKE_LMEM)
-i915_param_named_unsafe(fake_lmem_start, ulong, 0400,
- "Fake LMEM start offset (default: 0)");
-#endif
-
#if CONFIG_DRM_I915_REQUEST_TIMEOUT
i915_param_named_unsafe(request_timeout_ms, uint, 0600,
"Default request/fence/batch buffer expiration timeout.");
diff --git a/drivers/gpu/drm/i915/i915_params.h b/drivers/gpu/drm/i915/i915_params.h
index c9d53ff910a0..c779a6f85c7e 100644
--- a/drivers/gpu/drm/i915/i915_params.h
+++ b/drivers/gpu/drm/i915/i915_params.h
@@ -72,7 +72,6 @@ struct drm_printer;
param(int, fastboot, -1, 0600) \
param(int, enable_dpcd_backlight, -1, 0600) \
param(char *, force_probe, CONFIG_DRM_I915_FORCE_PROBE, 0400) \
- param(unsigned long, fake_lmem_start, 0, IS_ENABLED(CONFIG_DRM_I915_UNSTABLE_FAKE_LMEM) ? 0400 : 0) \
param(unsigned int, request_timeout_ms, CONFIG_DRM_I915_REQUEST_TIMEOUT, CONFIG_DRM_I915_REQUEST_TIMEOUT ? 0600 : 0) \
/* leave bools at the end to not create holes */ \
param(bool, enable_hangcheck, true, 0600) \
--
2.35.1
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