From 396593978724bc7e1cab7f63976680ad0eceeee0 Mon Sep 17 00:00:00 2001
From: Matthew Auld <matthew.auld@intel.com>
Date: Tue, 15 Mar 2022 18:14:19 +0000
Subject: drm/i915/lmem: don't treat small BAR as an error
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Git-commit: 56eda725c929da5d0a0141a923151d418856b364
Patch-mainline: v5.19-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225
Just pass along the probed io_size. The backend should be able to
utilize the entire range here, even if some of it is non-mappable.
It does leave open with what to do with stolen local-memory.
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Nirmoy Das <nirmoy.das@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220315181425.576828-1-matthew.auld@intel.com
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/i915/gt/intel_region_lmem.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_region_lmem.c b/drivers/gpu/drm/i915/gt/intel_region_lmem.c
index 6cecfdae07ad..783d81072c3b 100644
--- a/drivers/gpu/drm/i915/gt/intel_region_lmem.c
+++ b/drivers/gpu/drm/i915/gt/intel_region_lmem.c
@@ -93,6 +93,7 @@ static struct intel_memory_region *setup_lmem(struct intel_gt *gt)
struct intel_memory_region *mem;
resource_size_t min_page_size;
resource_size_t io_start;
+ resource_size_t io_size;
resource_size_t lmem_size;
int err;
@@ -124,7 +125,8 @@ static struct intel_memory_region *setup_lmem(struct intel_gt *gt)
io_start = pci_resource_start(pdev, 2);
- if (GEM_WARN_ON(lmem_size > pci_resource_len(pdev, 2)))
+ io_size = min(pci_resource_len(pdev, 2), lmem_size);
+ if (!io_size)
return ERR_PTR(-ENODEV);
min_page_size = HAS_64K_PAGES(i915) ? I915_GTT_PAGE_SIZE_64K :
@@ -134,7 +136,7 @@ static struct intel_memory_region *setup_lmem(struct intel_gt *gt)
lmem_size,
min_page_size,
io_start,
- lmem_size,
+ io_size,
INTEL_MEMORY_LOCAL,
0,
&intel_region_lmem_ops);
--
2.38.1