From: CQ Tang <cq.tang@xxxxxxxxx>
The lmem region needs to remove the stolen part.
Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
Cc: Matthew Auld <matthew.auld@xxxxxxxxx>
Cc: Abdiel Janulgue <abdiel.janulgue@xxxxxxxxxxxxxxx>
Cc: Chris P Wilson <chris.p.wilson@xxxxxxxxx>
Cc: Balestrieri, Francesco <francesco.balestrieri@xxxxxxxxx>
Cc: Niranjana Vishwanathapura <niranjana.vishwanathapura@xxxxxxxxx>
Cc: Venkata S Dhanalakota <venkata.s.dhanalakota@xxxxxxxxx>
Cc: Neel Desai <neel.desai@xxxxxxxxx>
Cc: Matthew Brost <matthew.brost@xxxxxxxxx>
Cc: Sudeep Dutt <sudeep.dutt@xxxxxxxxx>
Signed-off-by: CQ Tang <cq.tang@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_reg.h | 2 ++
drivers/gpu/drm/i915/intel_region_lmem.c | 11 +++++++----
2 files changed, 9 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index cebcd702d968..6e67c4ee09c2 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -12038,6 +12038,8 @@ enum skl_power_gate {
#define GEN12_LMEM_CFG_ADDR _MMIO(0xcf58)
#define LMEM_ENABLE (1 << 31)
+#define GEN12_GSMBASE _MMIO(0x108100)
+
/* gamt regs */
#define GEN8_L3_LRA_1_GPGPU _MMIO(0x4dd4)
#define GEN8_L3_LRA_1_GPGPU_DEFAULT_VALUE_BDW 0x67F1427F /* max/min for LRA1/2 */
diff --git a/drivers/gpu/drm/i915/intel_region_lmem.c b/drivers/gpu/drm/i915/intel_region_lmem.c
index 95c8d89d1fc9..3a8997fd832d 100644
--- a/drivers/gpu/drm/i915/intel_region_lmem.c
+++ b/drivers/gpu/drm/i915/intel_region_lmem.c
@@ -44,20 +44,23 @@ const struct intel_memory_region_ops intel_region_lmem_ops = {
static struct intel_memory_region *
setup_lmem(struct drm_i915_private *dev_priv)
{
+ struct intel_uncore *uncore = &dev_priv->uncore;
struct pci_dev *pdev = dev_priv->drm.pdev;
struct intel_memory_region *mem;
resource_size_t io_start;
- resource_size_t size;
+ resource_size_t lmem_size;
/* Enables Local Memory functionality in GAM */
I915_WRITE(GEN12_LMEM_CFG_ADDR, I915_READ(GEN12_LMEM_CFG_ADDR) | LMEM_ENABLE);
+ /* Stolen starts from GSMBASE on DG1 */
+ lmem_size = intel_uncore_read64(uncore, GEN12_GSMBASE);
+
io_start = pci_resource_start(pdev, 2);
- size = pci_resource_len(pdev, 2);
mem = intel_memory_region_create(dev_priv,
0,
- size,
+ lmem_size,
I915_GTT_PAGE_SIZE_4K,
io_start,
&intel_region_lmem_ops);
@@ -66,7 +69,7 @@ setup_lmem(struct drm_i915_private *dev_priv)
DRM_INFO("Intel graphics LMEM IO start: %llx\n",
(u64)mem->io_start);
DRM_INFO("Intel graphics LMEM size: %llx\n",
- (u64)size);
+ (u64)lmem_size);
}
return mem;
--
2.26.2
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