1 // SPDX-License-Identifier: MIT 2 /* 3 * Copyright © 2023-2024 Intel Corporation 4 */ 5 6 #include <drm/drm_managed.h> 7 8 #include "xe_gt_sriov_pf.h" 9 #include "xe_gt_sriov_pf_helpers.h" 10 11 /* 12 * VF's metadata is maintained in the flexible array where: 13 * - entry [0] contains metadata for the PF (only if applicable), 14 * - entries [1..n] contain metadata for VF1..VFn:: 15 * 16 * <--------------------------- 1 + total_vfs -----------> 17 * +-------+-------+-------+-----------------------+-------+ 18 * | 0 | 1 | 2 | | n | 19 * +-------+-------+-------+-----------------------+-------+ 20 * | PF | VF1 | VF2 | ... ... | VFn | 21 * +-------+-------+-------+-----------------------+-------+ 22 */ 23 static int pf_alloc_metadata(struct xe_gt *gt) 24 { 25 unsigned int num_vfs = xe_gt_sriov_pf_get_totalvfs(gt); 26 27 gt->sriov.pf.vfs = drmm_kcalloc(>_to_xe(gt)->drm, 1 + num_vfs, 28 sizeof(*gt->sriov.pf.vfs), GFP_KERNEL); 29 if (!gt->sriov.pf.vfs) 30 return -ENOMEM; 31 32 return 0; 33 } 34 35 /** 36 * xe_gt_sriov_pf_init_early - Prepare SR-IOV PF data structures on PF. 37 * @gt: the &xe_gt to initialize 38 * 39 * Early initialization of the PF data. 40 * 41 * Return: 0 on success or a negative error code on failure. 42 */ 43 int xe_gt_sriov_pf_init_early(struct xe_gt *gt) 44 { 45 int err; 46 47 err = pf_alloc_metadata(gt); 48 if (err) 49 return err; 50 51 return 0; 52 } 53