diff options
Diffstat (limited to 'drivers/gpu/drm/xe/xe_gt_sriov_pf.c')
-rw-r--r-- | drivers/gpu/drm/xe/xe_gt_sriov_pf.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/drivers/gpu/drm/xe/xe_gt_sriov_pf.c b/drivers/gpu/drm/xe/xe_gt_sriov_pf.c new file mode 100644 index 0000000000..791dcdd767 --- /dev/null +++ b/drivers/gpu/drm/xe/xe_gt_sriov_pf.c @@ -0,0 +1,52 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright © 2023-2024 Intel Corporation + */ + +#include <drm/drm_managed.h> + +#include "xe_gt_sriov_pf.h" +#include "xe_gt_sriov_pf_helpers.h" + +/* + * VF's metadata is maintained in the flexible array where: + * - entry [0] contains metadata for the PF (only if applicable), + * - entries [1..n] contain metadata for VF1..VFn:: + * + * <--------------------------- 1 + total_vfs -----------> + * +-------+-------+-------+-----------------------+-------+ + * | 0 | 1 | 2 | | n | + * +-------+-------+-------+-----------------------+-------+ + * | PF | VF1 | VF2 | ... ... | VFn | + * +-------+-------+-------+-----------------------+-------+ + */ +static int pf_alloc_metadata(struct xe_gt *gt) +{ + unsigned int num_vfs = xe_gt_sriov_pf_get_totalvfs(gt); + + gt->sriov.pf.vfs = drmm_kcalloc(>_to_xe(gt)->drm, 1 + num_vfs, + sizeof(*gt->sriov.pf.vfs), GFP_KERNEL); + if (!gt->sriov.pf.vfs) + return -ENOMEM; + + return 0; +} + +/** + * xe_gt_sriov_pf_init_early - Prepare SR-IOV PF data structures on PF. + * @gt: the &xe_gt to initialize + * + * Early initialization of the PF data. + * + * Return: 0 on success or a negative error code on failure. + */ +int xe_gt_sriov_pf_init_early(struct xe_gt *gt) +{ + int err; + + err = pf_alloc_metadata(gt); + if (err) + return err; + + return 0; +} |