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The PF driver must maintain additional GT level data per each VF. This additional per-VF data will be added in upcoming patches and will include: provisioning configuration (like GGTT space or LMEM allocation sizes or scheduling parameters), monitoring thresholds and counters, and more. As number of supported VFs varies across platforms use flexible array where first entry will contain metadata for the PF itself (if such configuration parameter is applicable for the PF) and all remaining entries will contain data for potential VFs. Reviewed-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com> Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20240415173937.1287-6-michal.wajdeczko@intel.com
53 lines
1.4 KiB
C
53 lines
1.4 KiB
C
// SPDX-License-Identifier: MIT
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/*
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* Copyright © 2023-2024 Intel Corporation
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*/
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#include <drm/drm_managed.h>
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#include "xe_gt_sriov_pf.h"
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#include "xe_gt_sriov_pf_helpers.h"
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/*
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* VF's metadata is maintained in the flexible array where:
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* - entry [0] contains metadata for the PF (only if applicable),
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* - entries [1..n] contain metadata for VF1..VFn::
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*
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* <--------------------------- 1 + total_vfs ----------->
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* +-------+-------+-------+-----------------------+-------+
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* | 0 | 1 | 2 | | n |
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* +-------+-------+-------+-----------------------+-------+
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* | PF | VF1 | VF2 | ... ... | VFn |
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* +-------+-------+-------+-----------------------+-------+
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*/
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static int pf_alloc_metadata(struct xe_gt *gt)
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{
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unsigned int num_vfs = xe_gt_sriov_pf_get_totalvfs(gt);
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gt->sriov.pf.vfs = drmm_kcalloc(>_to_xe(gt)->drm, 1 + num_vfs,
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sizeof(*gt->sriov.pf.vfs), GFP_KERNEL);
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if (!gt->sriov.pf.vfs)
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return -ENOMEM;
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return 0;
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}
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/**
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* xe_gt_sriov_pf_init_early - Prepare SR-IOV PF data structures on PF.
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* @gt: the &xe_gt to initialize
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*
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* Early initialization of the PF data.
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*
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* Return: 0 on success or a negative error code on failure.
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*/
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int xe_gt_sriov_pf_init_early(struct xe_gt *gt)
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{
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int err;
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err = pf_alloc_metadata(gt);
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if (err)
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return err;
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return 0;
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}
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