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_crtc_helper.h> 15 #include <drm/drm_damage_helper.h> 16 17 #include "vbox_drv.h" 18 #include "vboxvideo_guest.h" 19 #include "vboxvideo_vbe.h" 20 21 void 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 32 static 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 = pci_iomap_range(pdev, 0, 47 vbox->available_vram_size, 48 vbox->num_crtcs * 49 VBVA_MIN_BUFFER_SIZE); 50 if (!vbox->vbva_buffers) 51 return -ENOMEM; 52 53 for (i = 0; i < vbox->num_crtcs; ++i) { 54 vbva_setup_buffer_context(&vbox->vbva_info[i], 55 vbox->available_vram_size + 56 i * VBVA_MIN_BUFFER_SIZE, 57 VBVA_MIN_BUFFER_SIZE); 58 vbva = (void __force *)vbox->vbva_buffers + 59 i * VBVA_MIN_BUFFER_SIZE; 60 if (!vbva_enable(&vbox->vbva_info[i], 61 vbox->guest_pool, vbva, i)) { 62 /* very old host or driver error. */ 63 DRM_ERROR("vboxvideo: vbva_enable failed\n"); 64 } 65 } 66 67 return 0; 68 } 69 70 static void vbox_accel_fini(struct vbox_private *vbox) 71 { 72 unsigned int i; 73 74 for (i = 0; i < vbox->num_crtcs; ++i) 75 vbva_disable(&vbox->vbva_info[i], vbox->guest_pool, i); 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 struct pci_dev *pdev = to_pci_dev(vbox->ddev.dev); 112 int ret = -ENOMEM; 113 114 vbox->full_vram_size = inl(VBE_DISPI_IOPORT_DATA); 115 vbox->any_pitch = vbox_check_supported(VBE_DISPI_ID_ANYX); 116 117 DRM_INFO("VRAM %08x\n", vbox->full_vram_size); 118 119 /* Map guest-heap at end of vram */ 120 vbox->guest_heap = 121 pci_iomap_range(pdev, 0, GUEST_HEAP_OFFSET(vbox), 122 GUEST_HEAP_SIZE); 123 if (!vbox->guest_heap) 124 return -ENOMEM; 125 126 /* Create guest-heap mem-pool use 2^4 = 16 byte chunks */ 127 vbox->guest_pool = devm_gen_pool_create(vbox->ddev.dev, 4, -1, 128 "vboxvideo-accel"); 129 if (IS_ERR(vbox->guest_pool)) 130 return PTR_ERR(vbox->guest_pool); 131 132 ret = gen_pool_add_virt(vbox->guest_pool, 133 (unsigned long)vbox->guest_heap, 134 GUEST_HEAP_OFFSET(vbox), 135 GUEST_HEAP_USABLE_SIZE, -1); 136 if (ret) 137 return ret; 138 139 ret = hgsmi_test_query_conf(vbox->guest_pool); 140 if (ret) { 141 DRM_ERROR("vboxvideo: hgsmi_test_query_conf failed\n"); 142 return ret; 143 } 144 145 /* Reduce available VRAM size to reflect the guest heap. */ 146 vbox->available_vram_size = GUEST_HEAP_OFFSET(vbox); 147 /* Linux drm represents monitors as a 32-bit array. */ 148 hgsmi_query_conf(vbox->guest_pool, VBOX_VBVA_CONF32_MONITOR_COUNT, 149 &vbox->num_crtcs); 150 vbox->num_crtcs = clamp_t(u32, vbox->num_crtcs, 1, VBOX_MAX_SCREENS); 151 152 if (!have_hgsmi_mode_hints(vbox)) { 153 ret = -ENOTSUPP; 154 return ret; 155 } 156 157 vbox->last_mode_hints = devm_kcalloc(vbox->ddev.dev, vbox->num_crtcs, 158 sizeof(struct vbva_modehint), 159 GFP_KERNEL); 160 if (!vbox->last_mode_hints) 161 return -ENOMEM; 162 163 ret = vbox_accel_init(vbox); 164 if (ret) 165 return ret; 166 167 return 0; 168 } 169 170 void vbox_hw_fini(struct vbox_private *vbox) 171 { 172 vbox_accel_fini(vbox); 173 } 174