1 // SPDX-License-Identifier: MIT 2 /* Copyright (C) 2006-2017 Oracle Corporation */ 3 4 #include <linux/vbox_err.h> 5 #include "vbox_drv.h" 6 #include "vboxvideo_guest.h" 7 #include "vboxvideo_vbe.h" 8 #include "hgsmi_channels.h" 9 #include "hgsmi_ch_setup.h" 10 11 /** 12 * hgsmi_report_flags_location - Inform the host of the location of 13 * the host flags in VRAM via an HGSMI cmd. 14 * Return: 0 or negative errno value. 15 * @ctx: The context of the guest heap to use. 16 * @location: The offset chosen for the flags within guest VRAM. 17 */ 18 int hgsmi_report_flags_location(struct gen_pool *ctx, u32 location) 19 { 20 struct hgsmi_buffer_location *p; 21 22 p = hgsmi_buffer_alloc(ctx, sizeof(*p), HGSMI_CH_HGSMI, 23 HGSMI_CC_HOST_FLAGS_LOCATION); 24 if (!p) 25 return -ENOMEM; 26 27 p->buf_location = location; 28 p->buf_len = sizeof(struct hgsmi_host_flags); 29 30 hgsmi_buffer_submit(ctx, p); 31 hgsmi_buffer_free(ctx, p); 32 33 return 0; 34 } 35 36 /** 37 * hgsmi_send_caps_info - Notify the host of HGSMI-related guest capabilities 38 * via an HGSMI command. 39 * Return: 0 or negative errno value. 40 * @ctx: The context of the guest heap to use. 41 * @caps: The capabilities to report, see vbva_caps. 42 */ 43 int hgsmi_send_caps_info(struct gen_pool *ctx, u32 caps) 44 { 45 struct vbva_caps *p; 46 47 p = hgsmi_buffer_alloc(ctx, sizeof(*p), HGSMI_CH_VBVA, VBVA_INFO_CAPS); 48 if (!p) 49 return -ENOMEM; 50 51 p->rc = VERR_NOT_IMPLEMENTED; 52 p->caps = caps; 53 54 hgsmi_buffer_submit(ctx, p); 55 56 WARN_ON_ONCE(p->rc < 0); 57 58 hgsmi_buffer_free(ctx, p); 59 60 return 0; 61 } 62 63 int hgsmi_test_query_conf(struct gen_pool *ctx) 64 { 65 u32 value = 0; 66 int ret; 67 68 ret = hgsmi_query_conf(ctx, U32_MAX, &value); 69 if (ret) 70 return ret; 71 72 return value == U32_MAX ? 0 : -EIO; 73 } 74 75 /** 76 * hgsmi_query_conf - Query the host for an HGSMI configuration 77 * parameter via an HGSMI command. 78 * Return: 0 or negative errno value. 79 * @ctx: The context containing the heap used. 80 * @index: The index of the parameter to query. 81 * @value_ret: Where to store the value of the parameter on success. 82 */ 83 int hgsmi_query_conf(struct gen_pool *ctx, u32 index, u32 *value_ret) 84 { 85 struct vbva_conf32 *p; 86 87 p = hgsmi_buffer_alloc(ctx, sizeof(*p), HGSMI_CH_VBVA, 88 VBVA_QUERY_CONF32); 89 if (!p) 90 return -ENOMEM; 91 92 p->index = index; 93 p->value = U32_MAX; 94 95 hgsmi_buffer_submit(ctx, p); 96 97 *value_ret = p->value; 98 99 hgsmi_buffer_free(ctx, p); 100 101 return 0; 102 } 103 104 /** 105 * hgsmi_update_pointer_shape - Pass the host a new mouse pointer shape 106 * via an HGSMI command. 107 * Return: 0 or negative errno value. 108 * @ctx: The context containing the heap to be used. 109 * @flags: Cursor flags. 110 * @hot_x: Horizontal position of the hot spot. 111 * @hot_y: Vertical position of the hot spot. 112 * @width: Width in pixels of the cursor. 113 * @height: Height in pixels of the cursor. 114 * @pixels: Pixel data, @see VMMDevReqMousePointer for the format. 115 * @len: Size in bytes of the pixel data. 116 */ 117 int hgsmi_update_pointer_shape(struct gen_pool *ctx, u32 flags, 118 u32 hot_x, u32 hot_y, u32 width, u32 height, 119 u8 *pixels, u32 len) 120 { 121 struct vbva_mouse_pointer_shape *p; 122 u32 pixel_len = 0; 123 int rc; 124 125 if (flags & VBOX_MOUSE_POINTER_SHAPE) { 126 /* 127 * Size of the pointer data: 128 * sizeof (AND mask) + sizeof (XOR_MASK) 129 */ 130 pixel_len = ((((width + 7) / 8) * height + 3) & ~3) + 131 width * 4 * height; 132 if (pixel_len > len) 133 return -EINVAL; 134 135 /* 136 * If shape is supplied, then always create the pointer visible. 137 * See comments in 'vboxUpdatePointerShape' 138 */ 139 flags |= VBOX_MOUSE_POINTER_VISIBLE; 140 } 141 142 p = hgsmi_buffer_alloc(ctx, sizeof(*p) + pixel_len, HGSMI_CH_VBVA, 143 VBVA_MOUSE_POINTER_SHAPE); 144 if (!p) 145 return -ENOMEM; 146 147 p->result = VINF_SUCCESS; 148 p->flags = flags; 149 p->hot_X = hot_x; 150 p->hot_y = hot_y; 151 p->width = width; 152 p->height = height; 153 if (pixel_len) 154 memcpy(p->data, pixels, pixel_len); 155 156 hgsmi_buffer_submit(ctx, p); 157 158 switch (p->result) { 159 case VINF_SUCCESS: 160 rc = 0; 161 break; 162 case VERR_NO_MEMORY: 163 rc = -ENOMEM; 164 break; 165 case VERR_NOT_SUPPORTED: 166 rc = -EBUSY; 167 break; 168 default: 169 rc = -EINVAL; 170 } 171 172 hgsmi_buffer_free(ctx, p); 173 174 return rc; 175 } 176 177 /** 178 * hgsmi_cursor_position - Report the guest cursor position. The host may 179 * wish to use this information to re-position its 180 * own cursor (though this is currently unlikely). 181 * The current host cursor position is returned. 182 * Return: 0 or negative errno value. 183 * @ctx: The context containing the heap used. 184 * @report_position: Are we reporting a position? 185 * @x: Guest cursor X position. 186 * @y: Guest cursor Y position. 187 * @x_host: Host cursor X position is stored here. Optional. 188 * @y_host: Host cursor Y position is stored here. Optional. 189 */ 190 int hgsmi_cursor_position(struct gen_pool *ctx, bool report_position, 191 u32 x, u32 y, u32 *x_host, u32 *y_host) 192 { 193 struct vbva_cursor_position *p; 194 195 p = hgsmi_buffer_alloc(ctx, sizeof(*p), HGSMI_CH_VBVA, 196 VBVA_CURSOR_POSITION); 197 if (!p) 198 return -ENOMEM; 199 200 p->report_position = report_position; 201 p->x = x; 202 p->y = y; 203 204 hgsmi_buffer_submit(ctx, p); 205 206 *x_host = p->x; 207 *y_host = p->y; 208 209 hgsmi_buffer_free(ctx, p); 210 211 return 0; 212 } 213