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1// SPDX-License-Identifier: MIT2/*3 * Copyright (C) 2013-2017 Oracle Corporation4 * This file is based on ast_main.c5 * 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 16#include "vbox_drv.h"17#include "vboxvideo_guest.h"18#include "vboxvideo_vbe.h"19 20void vbox_report_caps(struct vbox_private *vbox)21{22 u32 caps = VBVACAPS_DISABLE_CURSOR_INTEGRATION |23 VBVACAPS_IRQ | VBVACAPS_USE_VBVA_ONLY;24 25 /* The host only accepts VIDEO_MODE_HINTS if it is send separately. */26 hgsmi_send_caps_info(vbox->guest_pool, caps);27 caps |= VBVACAPS_VIDEO_MODE_HINTS;28 hgsmi_send_caps_info(vbox->guest_pool, caps);29}30 31static int vbox_accel_init(struct vbox_private *vbox)32{33 struct pci_dev *pdev = to_pci_dev(vbox->ddev.dev);34 struct vbva_buffer *vbva;35 unsigned int i;36 37 vbox->vbva_info = devm_kcalloc(vbox->ddev.dev, vbox->num_crtcs,38 sizeof(*vbox->vbva_info), GFP_KERNEL);39 if (!vbox->vbva_info)40 return -ENOMEM;41 42 /* Take a command buffer for each screen from the end of usable VRAM. */43 vbox->available_vram_size -= vbox->num_crtcs * VBVA_MIN_BUFFER_SIZE;44 45 vbox->vbva_buffers = pcim_iomap_range(46 pdev, 0, vbox->available_vram_size,47 vbox->num_crtcs * VBVA_MIN_BUFFER_SIZE);48 if (IS_ERR(vbox->vbva_buffers))49 return PTR_ERR(vbox->vbva_buffers);50 51 for (i = 0; i < vbox->num_crtcs; ++i) {52 vbva_setup_buffer_context(&vbox->vbva_info[i],53 vbox->available_vram_size +54 i * VBVA_MIN_BUFFER_SIZE,55 VBVA_MIN_BUFFER_SIZE);56 vbva = (void __force *)vbox->vbva_buffers +57 i * VBVA_MIN_BUFFER_SIZE;58 if (!vbva_enable(&vbox->vbva_info[i],59 vbox->guest_pool, vbva, i)) {60 /* very old host or driver error. */61 DRM_ERROR("vboxvideo: vbva_enable failed\n");62 }63 }64 65 return 0;66}67 68static void vbox_accel_fini(struct vbox_private *vbox)69{70 unsigned int i;71 72 for (i = 0; i < vbox->num_crtcs; ++i)73 vbva_disable(&vbox->vbva_info[i], vbox->guest_pool, i);74}75 76/* Do we support the 4.3 plus mode hint reporting interface? */77static bool have_hgsmi_mode_hints(struct vbox_private *vbox)78{79 u32 have_hints, have_cursor;80 int ret;81 82 ret = hgsmi_query_conf(vbox->guest_pool,83 VBOX_VBVA_CONF32_MODE_HINT_REPORTING,84 &have_hints);85 if (ret)86 return false;87 88 ret = hgsmi_query_conf(vbox->guest_pool,89 VBOX_VBVA_CONF32_GUEST_CURSOR_REPORTING,90 &have_cursor);91 if (ret)92 return false;93 94 return have_hints == VINF_SUCCESS && have_cursor == VINF_SUCCESS;95}96 97bool vbox_check_supported(u16 id)98{99 u16 dispi_id;100 101 vbox_write_ioport(VBE_DISPI_INDEX_ID, id);102 dispi_id = inw(VBE_DISPI_IOPORT_DATA);103 104 return dispi_id == id;105}106 107int vbox_hw_init(struct vbox_private *vbox)108{109 struct pci_dev *pdev = to_pci_dev(vbox->ddev.dev);110 int ret = -ENOMEM;111 112 vbox->full_vram_size = inl(VBE_DISPI_IOPORT_DATA);113 vbox->any_pitch = vbox_check_supported(VBE_DISPI_ID_ANYX);114 115 DRM_INFO("VRAM %08x\n", vbox->full_vram_size);116 117 ret = pcim_request_region(pdev, 0, "vboxvideo");118 if (ret)119 return ret;120 121 /* Map guest-heap at end of vram */122 vbox->guest_heap = pcim_iomap_range(pdev, 0,123 GUEST_HEAP_OFFSET(vbox), GUEST_HEAP_SIZE);124 if (IS_ERR(vbox->guest_heap))125 return PTR_ERR(vbox->guest_heap);126 127 /* Create guest-heap mem-pool use 2^4 = 16 byte chunks */128 vbox->guest_pool = devm_gen_pool_create(vbox->ddev.dev, 4, -1,129 "vboxvideo-accel");130 if (IS_ERR(vbox->guest_pool))131 return PTR_ERR(vbox->guest_pool);132 133 ret = gen_pool_add_virt(vbox->guest_pool,134 (unsigned long)vbox->guest_heap,135 GUEST_HEAP_OFFSET(vbox),136 GUEST_HEAP_USABLE_SIZE, -1);137 if (ret)138 return ret;139 140 ret = hgsmi_test_query_conf(vbox->guest_pool);141 if (ret) {142 DRM_ERROR("vboxvideo: hgsmi_test_query_conf failed\n");143 return ret;144 }145 146 /* Reduce available VRAM size to reflect the guest heap. */147 vbox->available_vram_size = GUEST_HEAP_OFFSET(vbox);148 /* Linux drm represents monitors as a 32-bit array. */149 hgsmi_query_conf(vbox->guest_pool, VBOX_VBVA_CONF32_MONITOR_COUNT,150 &vbox->num_crtcs);151 vbox->num_crtcs = clamp_t(u32, vbox->num_crtcs, 1, VBOX_MAX_SCREENS);152 153 if (!have_hgsmi_mode_hints(vbox)) {154 ret = -ENOTSUPP;155 return ret;156 }157 158 vbox->last_mode_hints = devm_kcalloc(vbox->ddev.dev, vbox->num_crtcs,159 sizeof(struct vbva_modehint),160 GFP_KERNEL);161 if (!vbox->last_mode_hints)162 return -ENOMEM;163 164 ret = vbox_accel_init(vbox);165 if (ret)166 return ret;167 168 return 0;169}170 171void vbox_hw_fini(struct vbox_private *vbox)172{173 vbox_accel_fini(vbox);174}175