diff options
Diffstat (limited to 'drivers/gpu/drm/i915/gt/intel_region_lmem.c')
| -rw-r--r-- | drivers/gpu/drm/i915/gt/intel_region_lmem.c | 34 |
1 files changed, 29 insertions, 5 deletions
diff --git a/drivers/gpu/drm/i915/gt/intel_region_lmem.c b/drivers/gpu/drm/i915/gt/intel_region_lmem.c index 0cce4b2fcf60..6e90032e12e9 100644 --- a/drivers/gpu/drm/i915/gt/intel_region_lmem.c +++ b/drivers/gpu/drm/i915/gt/intel_region_lmem.c @@ -51,15 +51,39 @@ static void i915_resize_lmem_bar(struct drm_i915_private *i915, resource_size_t struct pci_bus *root = pdev->bus; struct resource *root_res; resource_size_t rebar_size; + resource_size_t current_size; u32 pci_cmd; int i; - rebar_size = roundup_pow_of_two(pci_resource_len(pdev, LMEM_BAR_NUM)); + current_size = roundup_pow_of_two(pci_resource_len(pdev, LMEM_BAR_NUM)); - if (rebar_size != roundup_pow_of_two(lmem_size)) - rebar_size = lmem_size; - else - return; + if (i915->params.lmem_bar_size) { + u32 bar_sizes; + + rebar_size = i915->params.lmem_bar_size * + (resource_size_t)SZ_1M; + bar_sizes = pci_rebar_get_possible_sizes(pdev, + LMEM_BAR_NUM); + + if (rebar_size == current_size) + return; + + if (!(bar_sizes & BIT(pci_rebar_bytes_to_size(rebar_size))) || + rebar_size >= roundup_pow_of_two(lmem_size)) { + rebar_size = lmem_size; + + drm_info(&i915->drm, + "Given bar size is not within supported size, setting it to default: %llu\n", + (u64)lmem_size >> 20); + } + } else { + rebar_size = current_size; + + if (rebar_size != roundup_pow_of_two(lmem_size)) + rebar_size = lmem_size; + else + return; + } /* Find out if root bus contains 64bit memory addressing */ while (root->parent) |