diff options
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/i915/gt/intel_region_lmem.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gt/intel_region_lmem.c b/drivers/gpu/drm/i915/gt/intel_region_lmem.c index 8ec244b02422..8c498e96b01d 100644 --- a/drivers/gpu/drm/i915/gt/intel_region_lmem.c +++ b/drivers/gpu/drm/i915/gt/intel_region_lmem.c @@ -143,6 +143,38 @@ intel_gt_setup_fake_lmem(struct intel_gt *gt) return mem; } +static bool get_legacy_lowmem_region(struct intel_uncore *uncore, + u64 *start, u32 *size) +{ + if (!IS_DG1_REVID(uncore->i915, DG1_REVID_A0, DG1_REVID_B0)) + return false; + + *start = 0; + *size = SZ_1M; + + drm_dbg(&uncore->i915->drm, "LMEM: reserved legacy low-memory [0x%llx-0x%llx]\n", + *start, *start + *size); + + return true; +} + +static int reserve_lowmem_region(struct intel_uncore *uncore, + struct intel_memory_region *mem) +{ + u64 reserve_start; + u32 reserve_size; + int ret; + + if (!get_legacy_lowmem_region(uncore, &reserve_start, &reserve_size)) + return 0; + + ret = intel_memory_region_reserve(mem, reserve_start, reserve_size); + if (ret) + drm_err(&uncore->i915->drm, "LMEM: reserving low memory region failed\n"); + + return ret; +} + static struct intel_memory_region *setup_lmem(struct intel_gt *gt) { struct drm_i915_private *i915 = gt->i915; @@ -151,6 +183,7 @@ static struct intel_memory_region *setup_lmem(struct intel_gt *gt) struct intel_memory_region *mem; resource_size_t io_start; resource_size_t lmem_size; + int err; if (!IS_DGFX(i915)) return ERR_PTR(-ENODEV); @@ -171,6 +204,10 @@ static struct intel_memory_region *setup_lmem(struct intel_gt *gt) if (IS_ERR(mem)) return mem; + err = reserve_lowmem_region(uncore, mem); + if (err) + goto err_region_put; + drm_dbg(&i915->drm, "Local memory: %pR\n", &mem->region); drm_dbg(&i915->drm, "Local memory IO start: %pa\n", &mem->io_start); @@ -178,6 +215,10 @@ static struct intel_memory_region *setup_lmem(struct intel_gt *gt) &lmem_size); return mem; + +err_region_put: + intel_memory_region_put(mem); + return ERR_PTR(err); } struct intel_memory_region *intel_gt_setup_lmem(struct intel_gt *gt) |