Quoting Matthew Auld (2020-11-27 12:06:23)
> 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 1af1966ac461..0e01ea0cb0a4 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -12066,6 +12066,8 @@ 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 e98582c76de1..7f2b31d469b0 100644
> --- a/drivers/gpu/drm/i915/intel_region_lmem.c
> +++ b/drivers/gpu/drm/i915/intel_region_lmem.c
> @@ -140,20 +140,23 @@ intel_setup_fake_lmem(struct drm_i915_private *i915)
> static struct intel_memory_region *
> setup_lmem(struct drm_i915_private *dev_priv)
Am I wrong in thinking lmem should be under gt?
> {
> + 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);
Sanitycheck the two.
size = min(size, lmem_size);
>
> mem = intel_memory_region_create(dev_priv,
> 0,
> - size,
> + lmem_size,
Ok, stolen is at tail not start.
> I915_GTT_PAGE_SIZE_4K,
> io_start,
> &intel_region_lmem_ops);
> @@ -162,7 +165,7 @@ 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);
Use the correct printf-formats, %pa.
> }
>
> return mem;
> --
> 2.26.2
>
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