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 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 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 = pci_iomap_range(pdev, 0, 46 vbox->available_vram_size, 47 vbox->num_crtcs * 48 VBVA_MIN_BUFFER_SIZE); 49 if (!vbox->vbva_buffers) 50 return -ENOMEM; 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 69 static 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? */ 78 static 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 98 bool 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 } 107 108 int 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 /* Map guest-heap at end of vram */ 119 vbox->guest_heap = 120 pci_iomap_range(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 = devm_gen_pool_create(vbox->ddev.dev, 4, -1, 127 "vboxvideo-accel"); 128 if (IS_ERR(vbox->guest_pool)) 129 return PTR_ERR(vbox->guest_pool); 130 131 ret = gen_pool_add_virt(vbox->guest_pool, 132 (unsigned long)vbox->guest_heap, 133 GUEST_HEAP_OFFSET(vbox), 134 GUEST_HEAP_USABLE_SIZE, -1); 135 if (ret) 136 return ret; 137 138 ret = hgsmi_test_query_conf(vbox->guest_pool); 139 if (ret) { 140 DRM_ERROR("vboxvideo: hgsmi_test_query_conf failed\n"); 141 return ret; 142 } 143 144 /* Reduce available VRAM size to reflect the guest heap. */ 145 vbox->available_vram_size = GUEST_HEAP_OFFSET(vbox); 146 /* Linux drm represents monitors as a 32-bit array. */ 147 hgsmi_query_conf(vbox->guest_pool, VBOX_VBVA_CONF32_MONITOR_COUNT, 148 &vbox->num_crtcs); 149 vbox->num_crtcs = clamp_t(u32, vbox->num_crtcs, 1, VBOX_MAX_SCREENS); 150 151 if (!have_hgsmi_mode_hints(vbox)) { 152 ret = -ENOTSUPP; 153 return ret; 154 } 155 156 vbox->last_mode_hints = devm_kcalloc(vbox->ddev.dev, vbox->num_crtcs, 157 sizeof(struct vbva_modehint), 158 GFP_KERNEL); 159 if (!vbox->last_mode_hints) 160 return -ENOMEM; 161 162 ret = vbox_accel_init(vbox); 163 if (ret) 164 return ret; 165 166 return 0; 167 } 168 169 void vbox_hw_fini(struct vbox_private *vbox) 170 { 171 vbox_accel_fini(vbox); 172 } 173