+Ram (git send-email didn't add Ram to the cc list for some reason)
On 5/11/2022 12:25 PM, Nirmoy Das wrote:
Determine lmem_size using ADDR_RANGE register so that module
load on platfrom with small bar with css works.
Signed-off-by: Nirmoy Das <nirmoy.das@xxxxxxxxx>
---
I once reserved a dg2 machine with small bar and module load failed on
it. I can't find that machine anymore hence sending this as RFC.
drivers/gpu/drm/i915/gt/intel_region_lmem.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_region_lmem.c b/drivers/gpu/drm/i915/gt/intel_region_lmem.c
index f5111c0a0060..a55eecac104e 100644
--- a/drivers/gpu/drm/i915/gt/intel_region_lmem.c
+++ b/drivers/gpu/drm/i915/gt/intel_region_lmem.c
@@ -100,10 +100,19 @@ static struct intel_memory_region *setup_lmem(struct intel_gt *gt)
if (!IS_DGFX(i915))
return ERR_PTR(-ENODEV);
+ if (IS_DG1(uncore->i915)) {
+ lmem_size = pci_resource_len(pdev, 2);
+ } else {
+ resource_size_t lmem_range;
+
+ lmem_range = intel_gt_read_register(&i915->gt0, XEHPSDV_TILE0_ADDR_RANGE) & 0xFFFF;
+ lmem_size = lmem_range >> XEHPSDV_TILE_LMEM_RANGE_SHIFT;
+ lmem_size *= SZ_1G;
+ }
+
if (HAS_FLAT_CCS(i915)) {
u64 tile_stolen, flat_ccs_base;
- lmem_size = pci_resource_len(pdev, 2);
flat_ccs_base = intel_gt_read_register(gt, XEHPSDV_FLAT_CCS_BASE_ADDR);
flat_ccs_base = (flat_ccs_base >> XEHPSDV_CCS_BASE_SHIFT) * SZ_64K;
