From fc876c9524e2a9f816f51d533ed31df789cff65a Mon Sep 17 00:00:00 2001
From: Tejas Upadhyay <tejas.upadhyay@intel.com>
Date: Wed, 5 Feb 2025 10:40:42 +0530
Subject: [PATCH 1/2] drm/xe/client: bo->client does not need bos_lock
bos_lock is to protect list of bos used by client, it is
not required to protect bo->client so bring it outside of
bos_lock.
Fixes: b27970f3e11c ("drm/xe: Add tracking support for bos per client")
Signed-off-by: Tejas Upadhyay <tejas.upadhyay@intel.com>
Reviewed-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Reviewed-by: Nirmoy Das <nirmoy.das@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250205051042.1991192-1-tejas.upadhyay@intel.com
Signed-off-by: Nirmoy Das <nirmoy.das@intel.com>
(cherry picked from commit f74fd53ba34551b7626193fb70c17226f06e9bf1)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
---
drivers/gpu/drm/xe/xe_drm_client.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/xe/xe_drm_client.c b/drivers/gpu/drm/xe/xe_drm_client.c
index 63f30b6df70b..2d4874d2b922 100644
--- a/drivers/gpu/drm/xe/xe_drm_client.c
+++ b/drivers/gpu/drm/xe/xe_drm_client.c
@@ -135,8 +135,8 @@ void xe_drm_client_add_bo(struct xe_drm_client *client,
XE_WARN_ON(bo->client);
XE_WARN_ON(!list_empty(&bo->client_link));
- spin_lock(&client->bos_lock);
bo->client = xe_drm_client_get(client);
+ spin_lock(&client->bos_lock);
list_add_tail(&bo->client_link, &client->bos_list);
spin_unlock(&client->bos_lock);
}
From e977499820782ab1c69f354d9f41b6d9ad1f43d9 Mon Sep 17 00:00:00 2001
From: Nirmoy Das <nirmoy.das@intel.com>
Date: Mon, 10 Feb 2025 15:36:54 +0100
Subject: [PATCH 2/2] 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)
Fixes: d8b52a02cb40 ("drm/xe: Implement stolen memory.")
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Cc: stable@vger.kernel.org # v6.11+
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250210143654.2076747-1-nirmoy.das@intel.com
Signed-off-by: Nirmoy Das <nirmoy.das@intel.com>
(cherry picked from commit 2c7f45cc7e197a792ce5c693e56ea48f60b312da)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
---
drivers/gpu/drm/xe/xe_ttm_stolen_mgr.c | 70 ++++++++++++++------------
1 file changed, 38 insertions(+), 32 deletions(-)
diff --git a/drivers/gpu/drm/xe/xe_ttm_stolen_mgr.c b/drivers/gpu/drm/xe/xe_ttm_stolen_mgr.c
index 423856cc18d4..d414421f8c13 100644
--- a/drivers/gpu/drm/xe/xe_ttm_stolen_mgr.c
+++ b/drivers/gpu/drm/xe/xe_ttm_stolen_mgr.c
@@ -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);