FAILED: patch "[PATCH] drm/xe: Carve out wopcm portion from the stolen memory" failed to apply to 6.12-stable tree
Subsystems (3)
[email protected]
maintainerThe patch below does not apply to the 6.12-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.12.y
git checkout FETCH_HEAD
git cherry-pick -x e977499820782ab1c69f354d9f41b6d9ad1f43d9
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<[email protected]>' --in-reply-to '2025021815-sublease-unneeded-0077@gregkh' --subject-prefix 'PATCH 6.12.y' HEAD^..
Possible dependencies:
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From e977499820782ab1c69f354d9f41b6d9ad1f43d9 Mon Sep 17 00:00:00 2001
From: Nirmoy Das <[email protected]>
Date: Mon, 10 Feb 2025 15:36:54 +0100
Subject: [PATCH] drm/xe: Carve out wopcm portion from the stolen memory
The top of stolen memory is WOPCM, which shouldn't be accessed. Remove this portion from the stolen memory region for discrete platforms. This was already done for integrated, but was missing for discrete platforms.
This also moves get_wopcm_size() so detect_bar2_dgfx() and detect_bar2_integrated can use the same function.
v2: Improve commit message and suitable stable version tag(Lucas)
drivers/gpu/drm/xe/xe_ttm_stolen_mgr.c +38 -32
@@ -57,38 +57,6 @@ bool xe_ttm_stolen_cpu_access_needs_ggtt(struct xe_device *xe)return GRAPHICS_VERx100 (xe) <1270 && !IS_DGFX (xe); } -static s64 detect_bar2_dgfx (struct xe_device *xe,struct xe_ttm_stolen_mgr *mgr) -{ -struct xe_tile *tile =xe_device_get_root_tile (xe); -struct xe_mmio *mmio =xe_root_tile_mmio (xe); -struct pci_dev *pdev =to_pci_dev (xe->drm.dev); -u64 stolen_size; -u64 tile_offset; -u64 tile_size; - - tile_offset = tile->mem.vram.io_start - xe->mem.vram.io_start; - tile_size = tile->mem.vram.actual_physical_size; - -/* Use DSM base address instead for stolen memory */ - mgr->stolen_base = (xe_mmio_read64_2x32 (mmio,DSMBASE ) &BDSM_MASK ) - tile_offset; -if (drm_WARN_ON (&xe->drm, tile_size < mgr->stolen_base)) -return 0 ; - - stolen_size = tile_size - mgr->stolen_base; - -/* Verify usage fits in the actual resource available */ -if (mgr->stolen_base + stolen_size <=pci_resource_len (pdev,LMEM_BAR )) - mgr->io_base = tile->mem.vram.io_start + mgr->stolen_base; - -/* -* There may be few KB of platform dependent reserved memory at the end -* of vram which is not part of the DSM. Such reserved memory portion is -* always less then DSM granularity so align down the stolen_size to DSM -* granularity to accommodate such reserve vram portion. -*/ -return ALIGN_DOWN (stolen_size,SZ_1M ); -} -static u32 get_wopcm_size (struct xe_device *xe) {u32 wopcm_size;
@@ -112,6 +80,44 @@ static u32 get_wopcm_size(struct xe_device *xe)return wopcm_size; } +static s64 detect_bar2_dgfx (struct xe_device *xe,struct xe_ttm_stolen_mgr *mgr) +{ +struct xe_tile *tile =xe_device_get_root_tile (xe); +struct xe_mmio *mmio =xe_root_tile_mmio (xe); +struct pci_dev *pdev =to_pci_dev (xe->drm.dev); +u64 stolen_size, wopcm_size; +u64 tile_offset; +u64 tile_size; + + tile_offset = tile->mem.vram.io_start - xe->mem.vram.io_start; + tile_size = tile->mem.vram.actual_physical_size; + +/* Use DSM base address instead for stolen memory */ + mgr->stolen_base = (xe_mmio_read64_2x32 (mmio,DSMBASE ) &BDSM_MASK ) - tile_offset; +if (drm_WARN_ON (&xe->drm, tile_size < mgr->stolen_base)) +return 0 ; + +/* Carve out the top of DSM as it contains the reserved WOPCM region */ + wopcm_size =get_wopcm_size (xe); +if (drm_WARN_ON (&xe->drm, !wopcm_size)) +return 0 ; + + stolen_size = tile_size - mgr->stolen_base; + stolen_size -= wopcm_size; + +/* Verify usage fits in the actual resource available */ +if (mgr->stolen_base + stolen_size <=pci_resource_len (pdev,LMEM_BAR )) + mgr->io_base = tile->mem.vram.io_start + mgr->stolen_base; + +/* +* There may be few KB of platform dependent reserved memory at the end +* of vram which is not part of the DSM. Such reserved memory portion is +* always less then DSM granularity so align down the stolen_size to DSM +* granularity to accommodate such reserve vram portion. +*/ +return ALIGN_DOWN (stolen_size,SZ_1M ); +} +static u32 detect_bar2_integrated (struct xe_device *xe,struct xe_ttm_stolen_mgr *mgr) {struct pci_dev *pdev =to_pci_dev (xe->drm.dev);