intel_sa_media.c

 1// SPDX-License-Identifier: MIT
 2/*
 3 * Copyright © 2021 Intel Corporation
 4 */
 5
 6#include <drm/drm_managed.h>
 7#include <drm/drm_print.h>
 8
 9#include "i915_drv.h"
10#include "gt/intel_gt.h"
11#include "gt/intel_sa_media.h"
12
13int intel_sa_mediagt_setup(struct intel_gt *gt, phys_addr_t phys_addr,
14			   u32 gsi_offset)
15{
16	struct drm_i915_private *i915 = gt->i915;
17	struct intel_uncore *uncore;
18
19	uncore = drmm_kzalloc(&i915->drm, sizeof(*uncore), GFP_KERNEL);
20	if (!uncore)
21		return -ENOMEM;
22
23	uncore->gsi_offset = gsi_offset;
24
25	gt->irq_lock = to_gt(i915)->irq_lock;
26	intel_gt_common_init_early(gt);
27	intel_uncore_init_early(uncore, gt);
28
29	/*
30	 * Standalone media shares the general MMIO space with the primary
31	 * GT.  We'll reuse the primary GT's mapping.
32	 */
33	uncore->regs = intel_uncore_regs(&i915->uncore);
34	if (drm_WARN_ON(&i915->drm, uncore->regs == NULL))
35		return -EIO;
36
37	gt->uncore = uncore;
38	gt->phys_addr = phys_addr;
39
40	/*
41	 * For current platforms we can assume there's only a single
42	 * media GT and cache it for quick lookup.
43	 */
44	drm_WARN_ON(&i915->drm, i915->media_gt);
45	i915->media_gt = gt;
46
47	return 0;
48}