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1// SPDX-License-Identifier: MIT2/*3 * Copyright © 2023-2024 Intel Corporation4 */5 6#include <drm/drm_managed.h>7 8#include "regs/xe_regs.h"9 10#include "xe_gt_sriov_pf.h"11#include "xe_gt_sriov_pf_config.h"12#include "xe_gt_sriov_pf_control.h"13#include "xe_gt_sriov_pf_helpers.h"14#include "xe_gt_sriov_pf_service.h"15#include "xe_mmio.h"16 17/*18 * VF's metadata is maintained in the flexible array where:19 * - entry [0] contains metadata for the PF (only if applicable),20 * - entries [1..n] contain metadata for VF1..VFn::21 *22 * <--------------------------- 1 + total_vfs ----------->23 * +-------+-------+-------+-----------------------+-------+24 * | 0 | 1 | 2 | | n |25 * +-------+-------+-------+-----------------------+-------+26 * | PF | VF1 | VF2 | ... ... | VFn |27 * +-------+-------+-------+-----------------------+-------+28 */29static int pf_alloc_metadata(struct xe_gt *gt)30{31 unsigned int num_vfs = xe_gt_sriov_pf_get_totalvfs(gt);32 33 gt->sriov.pf.vfs = drmm_kcalloc(>_to_xe(gt)->drm, 1 + num_vfs,34 sizeof(*gt->sriov.pf.vfs), GFP_KERNEL);35 if (!gt->sriov.pf.vfs)36 return -ENOMEM;37 38 return 0;39}40 41/**42 * xe_gt_sriov_pf_init_early - Prepare SR-IOV PF data structures on PF.43 * @gt: the &xe_gt to initialize44 *45 * Early initialization of the PF data.46 *47 * Return: 0 on success or a negative error code on failure.48 */49int xe_gt_sriov_pf_init_early(struct xe_gt *gt)50{51 int err;52 53 err = pf_alloc_metadata(gt);54 if (err)55 return err;56 57 err = xe_gt_sriov_pf_service_init(gt);58 if (err)59 return err;60 61 err = xe_gt_sriov_pf_control_init(gt);62 if (err)63 return err;64 65 return 0;66}67 68static bool pf_needs_enable_ggtt_guest_update(struct xe_device *xe)69{70 return GRAPHICS_VERx100(xe) == 1200;71}72 73static void pf_enable_ggtt_guest_update(struct xe_gt *gt)74{75 xe_mmio_write32(gt, VIRTUAL_CTRL_REG, GUEST_GTT_UPDATE_EN);76}77 78/**79 * xe_gt_sriov_pf_init_hw - Initialize SR-IOV hardware support.80 * @gt: the &xe_gt to initialize81 *82 * On some platforms the PF must explicitly enable VF's access to the GGTT.83 */84void xe_gt_sriov_pf_init_hw(struct xe_gt *gt)85{86 if (pf_needs_enable_ggtt_guest_update(gt_to_xe(gt)))87 pf_enable_ggtt_guest_update(gt);88 89 xe_gt_sriov_pf_service_update(gt);90}91 92/**93 * xe_gt_sriov_pf_restart - Restart SR-IOV support after a GT reset.94 * @gt: the &xe_gt95 *96 * This function can only be called on PF.97 */98void xe_gt_sriov_pf_restart(struct xe_gt *gt)99{100 xe_gt_sriov_pf_config_restart(gt);101 xe_gt_sriov_pf_control_restart(gt);102}103