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drm/xe: Split xe_migrate allocation from initialization

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Currently, xe_migrate_init handled both allocation and initialization,
Lets moves allocation to xe_tile_alloc via a new xe_migrate_alloc
function, and keep initialization in xe_migrate_init.
This will allow the migration pointers to be passed to other structures
before full initialization.
Also replaces devm_kzalloc with drmm_kzalloc for better
DRM-managed memory.

Signed-off-by: Piotr Piórkowski <piotr.piorkowski@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Link: https://lore.kernel.org/r/20250714184818.89201-5-piotr.piorkowski@intel.com
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
This commit is contained in:
Piotr Piórkowski
2025-07-14 20:48:17 +02:00
committed by Lucas De Marchi
parent 7a20b4f558
commit d65ff1ec85
3 changed files with 23 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

25
drivers/gpu/drm/xe/xe_migrate.c
View File

@@ -389,6 +389,23 @@ static bool xe_migrate_needs_ccs_emit(struct xe_device *xe)
return xe_device_has_flat_ccs(xe) && !(GRAPHICS_VER(xe) >= 20 && IS_DGFX(xe));
}
/**
* xe_migrate_alloc - Allocate a migrate struct for a given &xe_tile
* @tile: &xe_tile
*
* Allocates a &xe_migrate for a given tile.
*
* Return: &xe_migrate on success, or NULL when out of memory.
*/
struct xe_migrate *xe_migrate_alloc(struct xe_tile *tile)
{
struct xe_migrate *m = drmm_kzalloc(&tile_to_xe(tile)->drm, sizeof(*m), GFP_KERNEL);
if (m)
m->tile = tile;
return m;
}
/**
* xe_migrate_init() - Initialize a migrate context
* @tile: Back-pointer to the tile we're initializing for.
@@ -399,16 +416,10 @@ struct xe_migrate *xe_migrate_init(struct xe_tile *tile)
{
struct xe_device *xe = tile_to_xe(tile);
struct xe_gt *primary_gt = tile->primary_gt;
struct xe_migrate *m;
struct xe_migrate *m = tile->migrate;
struct xe_vm *vm;
int err;
m = devm_kzalloc(xe->drm.dev, sizeof(*m), GFP_KERNEL);
if (!m)
return ERR_PTR(-ENOMEM);
m->tile = tile;
/* Special layout, prepared below.. */
vm = xe_vm_create(xe, XE_VM_FLAG_MIGRATION |
XE_VM_FLAG_SET_TILE_ID(tile));

1
drivers/gpu/drm/xe/xe_migrate.h
View File

@@ -93,6 +93,7 @@ struct xe_migrate_pt_update {
u8 tile_id;
};
struct xe_migrate *xe_migrate_alloc(struct xe_tile *tile);
struct xe_migrate *xe_migrate_init(struct xe_tile *tile);
struct dma_fence *xe_migrate_to_vram(struct xe_migrate *m,

4
drivers/gpu/drm/xe/xe_tile.c
View File

@@ -94,6 +94,10 @@ static int xe_tile_alloc(struct xe_tile *tile)
if (!tile->mem.ggtt)
return -ENOMEM;
tile->migrate = xe_migrate_alloc(tile);
if (!tile->migrate)
return -ENOMEM;
return 0;
}