vbox_main.c

  1// SPDX-License-Identifier: MIT
  2/*
  3 * Copyright (C) 2013-2017 Oracle Corporation
  4 * This file is based on ast_main.c
  5 * Copyright 2012 Red Hat Inc.
  6 * Authors: Dave Airlie <airlied@redhat.com>,
  7 *          Michael Thayer <michael.thayer@oracle.com,
  8 *          Hans de Goede <hdegoede@redhat.com>
  9 */
 10
 11#include <linux/pci.h>
 12#include <linux/vbox_err.h>
 13
 14#include <drm/drm_damage_helper.h>
 15#include <drm/drm_print.h>
 16
 17#include "vbox_drv.h"
 18#include "vboxvideo_guest.h"
 19#include "vboxvideo_vbe.h"
 20
 21void vbox_report_caps(struct vbox_private *vbox)
 22{
 23	u32 caps = VBVACAPS_DISABLE_CURSOR_INTEGRATION |
 24		   VBVACAPS_IRQ | VBVACAPS_USE_VBVA_ONLY;
 25
 26	/* The host only accepts VIDEO_MODE_HINTS if it is send separately. */
 27	hgsmi_send_caps_info(vbox->guest_pool, caps);
 28	caps |= VBVACAPS_VIDEO_MODE_HINTS;
 29	hgsmi_send_caps_info(vbox->guest_pool, caps);
 30}
 31
 32static int vbox_accel_init(struct vbox_private *vbox)
 33{
 34	struct pci_dev *pdev = to_pci_dev(vbox->ddev.dev);
 35	struct vbva_buffer *vbva;
 36	unsigned int i;
 37
 38	vbox->vbva_info = devm_kcalloc(vbox->ddev.dev, vbox->num_crtcs,
 39				       sizeof(*vbox->vbva_info), GFP_KERNEL);
 40	if (!vbox->vbva_info)
 41		return -ENOMEM;
 42
 43	/* Take a command buffer for each screen from the end of usable VRAM. */
 44	vbox->available_vram_size -= vbox->num_crtcs * VBVA_MIN_BUFFER_SIZE;
 45
 46	vbox->vbva_buffers = pcim_iomap_range(
 47			pdev, 0, vbox->available_vram_size,
 48			vbox->num_crtcs * VBVA_MIN_BUFFER_SIZE);
 49	if (IS_ERR(vbox->vbva_buffers))
 50		return PTR_ERR(vbox->vbva_buffers);
 51
 52	for (i = 0; i < vbox->num_crtcs; ++i) {
 53		vbva_setup_buffer_context(&vbox->vbva_info[i],
 54					  vbox->available_vram_size +
 55					  i * VBVA_MIN_BUFFER_SIZE,
 56					  VBVA_MIN_BUFFER_SIZE);
 57		vbva = (void __force *)vbox->vbva_buffers +
 58			i * VBVA_MIN_BUFFER_SIZE;
 59		if (!vbva_enable(&vbox->vbva_info[i],
 60				 vbox->guest_pool, vbva, i)) {
 61			/* very old host or driver error. */
 62			DRM_ERROR("vboxvideo: vbva_enable failed\n");
 63		}
 64	}
 65
 66	return 0;
 67}
 68
 69static void vbox_accel_fini(struct vbox_private *vbox)
 70{
 71	unsigned int i;
 72
 73	for (i = 0; i < vbox->num_crtcs; ++i)
 74		vbva_disable(&vbox->vbva_info[i], vbox->guest_pool, i);
 75}
 76
 77/* Do we support the 4.3 plus mode hint reporting interface? */
 78static bool have_hgsmi_mode_hints(struct vbox_private *vbox)
 79{
 80	u32 have_hints, have_cursor;
 81	int ret;
 82
 83	ret = hgsmi_query_conf(vbox->guest_pool,
 84			       VBOX_VBVA_CONF32_MODE_HINT_REPORTING,
 85			       &have_hints);
 86	if (ret)
 87		return false;
 88
 89	ret = hgsmi_query_conf(vbox->guest_pool,
 90			       VBOX_VBVA_CONF32_GUEST_CURSOR_REPORTING,
 91			       &have_cursor);
 92	if (ret)
 93		return false;
 94
 95	return have_hints == VINF_SUCCESS && have_cursor == VINF_SUCCESS;
 96}
 97
 98bool vbox_check_supported(u16 id)
 99{
100	u16 dispi_id;
101
102	vbox_write_ioport(VBE_DISPI_INDEX_ID, id);
103	dispi_id = inw(VBE_DISPI_IOPORT_DATA);
104
105	return dispi_id == id;
106}
107
108int vbox_hw_init(struct vbox_private *vbox)
109{
110	struct pci_dev *pdev = to_pci_dev(vbox->ddev.dev);
111	int ret = -ENOMEM;
112
113	vbox->full_vram_size = inl(VBE_DISPI_IOPORT_DATA);
114	vbox->any_pitch = vbox_check_supported(VBE_DISPI_ID_ANYX);
115
116	DRM_INFO("VRAM %08x\n", vbox->full_vram_size);
117
118	ret = pcim_request_region(pdev, 0, "vboxvideo");
119	if (ret)
120		return ret;
121
122	/* Map guest-heap at end of vram */
123	vbox->guest_heap = pcim_iomap_range(pdev, 0,
124			GUEST_HEAP_OFFSET(vbox), GUEST_HEAP_SIZE);
125	if (IS_ERR(vbox->guest_heap))
126		return PTR_ERR(vbox->guest_heap);
127
128	/* Create guest-heap mem-pool use 2^4 = 16 byte chunks */
129	vbox->guest_pool = devm_gen_pool_create(vbox->ddev.dev, 4, -1,
130						"vboxvideo-accel");
131	if (IS_ERR(vbox->guest_pool))
132		return PTR_ERR(vbox->guest_pool);
133
134	ret = gen_pool_add_virt(vbox->guest_pool,
135				(unsigned long)vbox->guest_heap,
136				GUEST_HEAP_OFFSET(vbox),
137				GUEST_HEAP_USABLE_SIZE, -1);
138	if (ret)
139		return ret;
140
141	ret = hgsmi_test_query_conf(vbox->guest_pool);
142	if (ret) {
143		DRM_ERROR("vboxvideo: hgsmi_test_query_conf failed\n");
144		return ret;
145	}
146
147	/* Reduce available VRAM size to reflect the guest heap. */
148	vbox->available_vram_size = GUEST_HEAP_OFFSET(vbox);
149	/* Linux drm represents monitors as a 32-bit array. */
150	hgsmi_query_conf(vbox->guest_pool, VBOX_VBVA_CONF32_MONITOR_COUNT,
151			 &vbox->num_crtcs);
152	vbox->num_crtcs = clamp_t(u32, vbox->num_crtcs, 1, VBOX_MAX_SCREENS);
153
154	if (!have_hgsmi_mode_hints(vbox)) {
155		ret = -ENOTSUPP;
156		return ret;
157	}
158
159	vbox->last_mode_hints = devm_kcalloc(vbox->ddev.dev, vbox->num_crtcs,
160					     sizeof(struct vbva_modehint),
161					     GFP_KERNEL);
162	if (!vbox->last_mode_hints)
163		return -ENOMEM;
164
165	ret = vbox_accel_init(vbox);
166	if (ret)
167		return ret;
168
169	return 0;
170}
171
172void vbox_hw_fini(struct vbox_private *vbox)
173{
174	vbox_accel_fini(vbox);
175}