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/vbox_err.h> 12 #include <drm/drm_fb_helper.h> 13 #include <drm/drm_crtc_helper.h> 14 #include <drm/drm_damage_helper.h> 15 16 #include "vbox_drv.h" 17 #include "vboxvideo_guest.h" 18 #include "vboxvideo_vbe.h" 19 20 void 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 31 static int vbox_accel_init(struct vbox_private *vbox) 32 { 33 struct vbva_buffer *vbva; 34 unsigned int i; 35 36 vbox->vbva_info = devm_kcalloc(vbox->ddev.dev, vbox->num_crtcs, 37 sizeof(*vbox->vbva_info), GFP_KERNEL); 38 if (!vbox->vbva_info) 39 return -ENOMEM; 40 41 /* Take a command buffer for each screen from the end of usable VRAM. */ 42 vbox->available_vram_size -= vbox->num_crtcs * VBVA_MIN_BUFFER_SIZE; 43 44 vbox->vbva_buffers = pci_iomap_range(vbox->ddev.pdev, 0, 45 vbox->available_vram_size, 46 vbox->num_crtcs * 47 VBVA_MIN_BUFFER_SIZE); 48 if (!vbox->vbva_buffers) 49 return -ENOMEM; 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 68 static 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 pci_iounmap(vbox->ddev.pdev, vbox->vbva_buffers); 76 } 77 78 /* Do we support the 4.3 plus mode hint reporting interface? */ 79 static bool have_hgsmi_mode_hints(struct vbox_private *vbox) 80 { 81 u32 have_hints, have_cursor; 82 int ret; 83 84 ret = hgsmi_query_conf(vbox->guest_pool, 85 VBOX_VBVA_CONF32_MODE_HINT_REPORTING, 86 &have_hints); 87 if (ret) 88 return false; 89 90 ret = hgsmi_query_conf(vbox->guest_pool, 91 VBOX_VBVA_CONF32_GUEST_CURSOR_REPORTING, 92 &have_cursor); 93 if (ret) 94 return false; 95 96 return have_hints == VINF_SUCCESS && have_cursor == VINF_SUCCESS; 97 } 98 99 bool vbox_check_supported(u16 id) 100 { 101 u16 dispi_id; 102 103 vbox_write_ioport(VBE_DISPI_INDEX_ID, id); 104 dispi_id = inw(VBE_DISPI_IOPORT_DATA); 105 106 return dispi_id == id; 107 } 108 109 int vbox_hw_init(struct vbox_private *vbox) 110 { 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 /* Map guest-heap at end of vram */ 119 vbox->guest_heap = 120 pci_iomap_range(vbox->ddev.pdev, 0, GUEST_HEAP_OFFSET(vbox), 121 GUEST_HEAP_SIZE); 122 if (!vbox->guest_heap) 123 return -ENOMEM; 124 125 /* Create guest-heap mem-pool use 2^4 = 16 byte chunks */ 126 vbox->guest_pool = gen_pool_create(4, -1); 127 if (!vbox->guest_pool) 128 goto err_unmap_guest_heap; 129 130 ret = gen_pool_add_virt(vbox->guest_pool, 131 (unsigned long)vbox->guest_heap, 132 GUEST_HEAP_OFFSET(vbox), 133 GUEST_HEAP_USABLE_SIZE, -1); 134 if (ret) 135 goto err_destroy_guest_pool; 136 137 ret = hgsmi_test_query_conf(vbox->guest_pool); 138 if (ret) { 139 DRM_ERROR("vboxvideo: hgsmi_test_query_conf failed\n"); 140 goto err_destroy_guest_pool; 141 } 142 143 /* Reduce available VRAM size to reflect the guest heap. */ 144 vbox->available_vram_size = GUEST_HEAP_OFFSET(vbox); 145 /* Linux drm represents monitors as a 32-bit array. */ 146 hgsmi_query_conf(vbox->guest_pool, VBOX_VBVA_CONF32_MONITOR_COUNT, 147 &vbox->num_crtcs); 148 vbox->num_crtcs = clamp_t(u32, vbox->num_crtcs, 1, VBOX_MAX_SCREENS); 149 150 if (!have_hgsmi_mode_hints(vbox)) { 151 ret = -ENOTSUPP; 152 goto err_destroy_guest_pool; 153 } 154 155 vbox->last_mode_hints = devm_kcalloc(vbox->ddev.dev, vbox->num_crtcs, 156 sizeof(struct vbva_modehint), 157 GFP_KERNEL); 158 if (!vbox->last_mode_hints) { 159 ret = -ENOMEM; 160 goto err_destroy_guest_pool; 161 } 162 163 ret = vbox_accel_init(vbox); 164 if (ret) 165 goto err_destroy_guest_pool; 166 167 return 0; 168 169 err_destroy_guest_pool: 170 gen_pool_destroy(vbox->guest_pool); 171 err_unmap_guest_heap: 172 pci_iounmap(vbox->ddev.pdev, vbox->guest_heap); 173 return ret; 174 } 175 176 void vbox_hw_fini(struct vbox_private *vbox) 177 { 178 vbox_accel_fini(vbox); 179 gen_pool_destroy(vbox->guest_pool); 180 pci_iounmap(vbox->ddev.pdev, vbox->guest_heap); 181 } 182