diff options
Diffstat (limited to 'drivers/gpu/drm/vboxvideo/hgsmi_base.c')
| -rw-r--r-- | drivers/gpu/drm/vboxvideo/hgsmi_base.c | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/drivers/gpu/drm/vboxvideo/hgsmi_base.c b/drivers/gpu/drm/vboxvideo/hgsmi_base.c new file mode 100644 index 000000000000..361d3193258e --- /dev/null +++ b/drivers/gpu/drm/vboxvideo/hgsmi_base.c @@ -0,0 +1,207 @@ +// SPDX-License-Identifier: MIT +/* Copyright (C) 2006-2017 Oracle Corporation */ + +#include <linux/vbox_err.h> +#include "vbox_drv.h" +#include "vboxvideo_guest.h" +#include "vboxvideo_vbe.h" +#include "hgsmi_channels.h" +#include "hgsmi_ch_setup.h" + +/** + * Inform the host of the location of the host flags in VRAM via an HGSMI cmd. + * Return: 0 or negative errno value. + * @ctx: The context of the guest heap to use. + * @location: The offset chosen for the flags within guest VRAM. + */ +int hgsmi_report_flags_location(struct gen_pool *ctx, u32 location) +{ + struct hgsmi_buffer_location *p; + + p = hgsmi_buffer_alloc(ctx, sizeof(*p), HGSMI_CH_HGSMI, + HGSMI_CC_HOST_FLAGS_LOCATION); + if (!p) + return -ENOMEM; + + p->buf_location = location; + p->buf_len = sizeof(struct hgsmi_host_flags); + + hgsmi_buffer_submit(ctx, p); + hgsmi_buffer_free(ctx, p); + + return 0; +} + +/** + * Notify the host of HGSMI-related guest capabilities via an HGSMI command. + * Return: 0 or negative errno value. + * @ctx: The context of the guest heap to use. + * @caps: The capabilities to report, see vbva_caps. + */ +int hgsmi_send_caps_info(struct gen_pool *ctx, u32 caps) +{ + struct vbva_caps *p; + + p = hgsmi_buffer_alloc(ctx, sizeof(*p), HGSMI_CH_VBVA, VBVA_INFO_CAPS); + if (!p) + return -ENOMEM; + + p->rc = VERR_NOT_IMPLEMENTED; + p->caps = caps; + + hgsmi_buffer_submit(ctx, p); + + WARN_ON_ONCE(p->rc < 0); + + hgsmi_buffer_free(ctx, p); + + return 0; +} + +int hgsmi_test_query_conf(struct gen_pool *ctx) +{ + u32 value = 0; + int ret; + + ret = hgsmi_query_conf(ctx, U32_MAX, &value); + if (ret) + return ret; + + return value == U32_MAX ? 0 : -EIO; +} + +/** + * Query the host for an HGSMI configuration parameter via an HGSMI command. + * Return: 0 or negative errno value. + * @ctx: The context containing the heap used. + * @index: The index of the parameter to query. + * @value_ret: Where to store the value of the parameter on success. + */ +int hgsmi_query_conf(struct gen_pool *ctx, u32 index, u32 *value_ret) +{ + struct vbva_conf32 *p; + + p = hgsmi_buffer_alloc(ctx, sizeof(*p), HGSMI_CH_VBVA, + VBVA_QUERY_CONF32); + if (!p) + return -ENOMEM; + + p->index = index; + p->value = U32_MAX; + + hgsmi_buffer_submit(ctx, p); + + *value_ret = p->value; + + hgsmi_buffer_free(ctx, p); + + return 0; +} + +/** + * Pass the host a new mouse pointer shape via an HGSMI command. + * Return: 0 or negative errno value. + * @ctx: The context containing the heap to be used. + * @flags: Cursor flags. + * @hot_x: Horizontal position of the hot spot. + * @hot_y: Vertical position of the hot spot. + * @width: Width in pixels of the cursor. + * @height: Height in pixels of the cursor. + * @pixels: Pixel data, @see VMMDevReqMousePointer for the format. + * @len: Size in bytes of the pixel data. + */ +int hgsmi_update_pointer_shape(struct gen_pool *ctx, u32 flags, + u32 hot_x, u32 hot_y, u32 width, u32 height, + u8 *pixels, u32 len) +{ + struct vbva_mouse_pointer_shape *p; + u32 pixel_len = 0; + int rc; + + if (flags & VBOX_MOUSE_POINTER_SHAPE) { + /* + * Size of the pointer data: + * sizeof (AND mask) + sizeof (XOR_MASK) + */ + pixel_len = ((((width + 7) / 8) * height + 3) & ~3) + + width * 4 * height; + if (pixel_len > len) + return -EINVAL; + + /* + * If shape is supplied, then always create the pointer visible. + * See comments in 'vboxUpdatePointerShape' + */ + flags |= VBOX_MOUSE_POINTER_VISIBLE; + } + + p = hgsmi_buffer_alloc(ctx, sizeof(*p) + pixel_len, HGSMI_CH_VBVA, + VBVA_MOUSE_POINTER_SHAPE); + if (!p) + return -ENOMEM; + + p->result = VINF_SUCCESS; + p->flags = flags; + p->hot_X = hot_x; + p->hot_y = hot_y; + p->width = width; + p->height = height; + if (pixel_len) + memcpy(p->data, pixels, pixel_len); + + hgsmi_buffer_submit(ctx, p); + + switch (p->result) { + case VINF_SUCCESS: + rc = 0; + break; + case VERR_NO_MEMORY: + rc = -ENOMEM; + break; + case VERR_NOT_SUPPORTED: + rc = -EBUSY; + break; + default: + rc = -EINVAL; + } + + hgsmi_buffer_free(ctx, p); + + return rc; +} + +/** + * Report the guest cursor position. The host may wish to use this information + * to re-position its own cursor (though this is currently unlikely). The + * current host cursor position is returned. + * Return: 0 or negative errno value. + * @ctx: The context containing the heap used. + * @report_position: Are we reporting a position? + * @x: Guest cursor X position. + * @y: Guest cursor Y position. + * @x_host: Host cursor X position is stored here. Optional. + * @y_host: Host cursor Y position is stored here. Optional. + */ +int hgsmi_cursor_position(struct gen_pool *ctx, bool report_position, + u32 x, u32 y, u32 *x_host, u32 *y_host) +{ + struct vbva_cursor_position *p; + + p = hgsmi_buffer_alloc(ctx, sizeof(*p), HGSMI_CH_VBVA, + VBVA_CURSOR_POSITION); + if (!p) + return -ENOMEM; + + p->report_position = report_position; + p->x = x; + p->y = y; + + hgsmi_buffer_submit(ctx, p); + + *x_host = p->x; + *y_host = p->y; + + hgsmi_buffer_free(ctx, p); + + return 0; +} |