- 根目录:
- drivers
- gpu
- drm
- qxl
- qxl_fb.c
/*
* Copyright © 2013 Red Hat
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Authors:
* David Airlie
*/
#include <linux/module.h>
#include <linux/fb.h>
#include "drmP.h"
#include "drm/drm.h"
#include "drm/drm_crtc.h"
#include "drm/drm_crtc_helper.h"
#include "qxl_drv.h"
#include "qxl_object.h"
#include "drm_fb_helper.h"
#define QXL_DIRTY_DELAY (HZ / 30)
struct qxl_fbdev {
struct drm_fb_helper helper;
struct qxl_framebuffer qfb;
struct list_head fbdev_list;
struct qxl_device *qdev;
void *shadow;
int size;
/* dirty memory logging */
struct {
spinlock_t lock;
bool active;
unsigned x1;
unsigned y1;
unsigned x2;
unsigned y2;
} dirty;
};
static void qxl_fb_image_init(struct qxl_fb_image *qxl_fb_image,
struct qxl_device *qdev, struct fb_info *info,
const struct fb_image *image)
{
qxl_fb_image->qdev = qdev;
if (info) {
qxl_fb_image->visual = info->fix.visual;
if (qxl_fb_image->visual == FB_VISUAL_TRUECOLOR ||
qxl_fb_image->visual == FB_VISUAL_DIRECTCOLOR)
memcpy(&qxl_fb_image->pseudo_palette,
info->pseudo_palette,
sizeof(qxl_fb_image->pseudo_palette));
} else {
/* fallback */
if (image->depth == 1)
qxl_fb_image->visual = FB_VISUAL_MONO10;
else
qxl_fb_image->visual = FB_VISUAL_DIRECTCOLOR;
}
if (image) {
memcpy(&qxl_fb_image->fb_image, image,
sizeof(qxl_fb_image->fb_image));
}
}
static void qxl_fb_dirty_flush(struct fb_info *info)
{
struct qxl_fbdev *qfbdev = info->par;
struct qxl_device *qdev = qfbdev->qdev;
struct qxl_fb_image qxl_fb_image;
struct fb_image *image = &qxl_fb_image.fb_image;
u32 x1, x2, y1, y2;
/* TODO: hard coding 32 bpp */
int stride = qfbdev->qfb.base.pitches[0] * 4;
x1 = qfbdev->dirty.x1;
x2 = qfbdev->dirty.x2;
y1 = qfbdev->dirty.y1;
y2 = qfbdev->dirty.y2;
/*
* we are using a shadow draw buffer, at qdev->surface0_shadow
*/
qxl_io_log(qdev, "dirty x[%d, %d], y[%d, %d]", x1, x2, y1, y2);
image->dx = x1;
image->dy = y1;
image->width = x2 - x1;
image->height = y2 - y1;
image->fg_color = 0xffffffff; /* unused, just to avoid uninitialized
warnings */
image->bg_color = 0;
image->depth = 32; /* TODO: take from somewhere? */
image->cmap.start = 0;
image->cmap.len = 0;
image->cmap.red = NULL;
image->cmap.green = NULL;
image->cmap.blue = NULL;
image->cmap.transp = NULL;
image->data = qfbdev->shadow + (x1 * 4) + (stride * y1);
qxl_fb_image_init(&qxl_fb_image, qdev, info, NULL);
qxl_draw_opaque_fb(&qxl_fb_image, stride);
qfbdev->dirty.x1 = 0;
qfbdev->dirty.x2 = 0;
qfbdev->dirty.y1 = 0;
qfbdev->dirty.y2 = 0;
}
static void qxl_deferred_io(struct fb_info *info,
struct list_head *pagelist)
{
struct qxl_fbdev *qfbdev = info->par;
unsigned long start, end, min, max;
struct page *page;
int y1, y2;
min = ULONG_MAX;
max = 0;
list_for_each_entry(page, pagelist, lru) {
start = page->index << PAGE_SHIFT;
end = start + PAGE_SIZE - 1;
min = min(min, start);
max = max(max, end);
}
if (min < max) {
y1 = min / info->fix.line_length;
y2 = (max / info->fix.line_length) + 1;
/* TODO: add spin lock? */
/* spin_lock_irqsave(&qfbdev->dirty.lock, flags); */
qfbdev->dirty.x1 = 0;
qfbdev->dirty.y1 = y1;
qfbdev->dirty.x2 = info->var.xres;
qfbdev->dirty.y2 = y2;
/* spin_unlock_irqrestore(&qfbdev->dirty.lock, flags); */
}
qxl_fb_dirty_flush(info);
};
static struct fb_deferred_io qxl_defio = {
.delay = QXL_DIRTY_DELAY,
.deferred_io = qxl_deferred_io,
};
static void qxl_fb_fillrect(struct fb_info *info,
const struct fb_fillrect *fb_rect)
{
struct qxl_fbdev *qfbdev = info->par;
struct qxl_device *qdev = qfbdev->qdev;
struct qxl_rect rect;
uint32_t color;
int x = fb_rect->dx;
int y = fb_rect->dy;
int width = fb_rect->width;
int height = fb_rect->height;
uint16_t rop;
struct qxl_draw_fill qxl_draw_fill_rec;
if (info->fix.visual == FB_VISUAL_TRUECOLOR ||
info->fix.visual == FB_VISUAL_DIRECTCOLOR)
color = ((u32 *) (info->pseudo_palette))[fb_rect->color];
else
color = fb_rect->color;
rect.left = x;
rect.right = x + width;
rect.top = y;
rect.bottom = y + height;
switch (fb_rect->rop) {
case ROP_XOR:
rop = SPICE_ROPD_OP_XOR;
break;
case ROP_COPY:
rop = SPICE_ROPD_OP_PUT;
break;
default:
pr_err("qxl_fb_fillrect(): unknown rop, "
"defaulting to SPICE_ROPD_OP_PUT\n");
rop = SPICE_ROPD_OP_PUT;
}
qxl_draw_fill_rec.qdev = qdev;
qxl_draw_fill_rec.rect = rect;
qxl_draw_fill_rec.color = color;
qxl_draw_fill_rec.rop = rop;
if (!drm_can_sleep()) {
qxl_io_log(qdev,
"%s: TODO use RCU, mysterious locks with spin_lock\n",
__func__);
return;
}
qxl_draw_fill(&qxl_draw_fill_rec);
}
static void qxl_fb_copyarea(struct fb_info *info,
const struct fb_copyarea *region)
{
struct qxl_fbdev *qfbdev = info->par;
qxl_draw_copyarea(qfbdev->qdev,
region->width, region->height,
region->sx, region->sy,
region->dx, region->dy);
}
static void qxl_fb_imageblit_safe(struct qxl_fb_image *qxl_fb_image)
{
qxl_draw_opaque_fb(qxl_fb_image, 0);
}
static void qxl_fb_imageblit(struct fb_info *info,
const struct fb_image *image)
{
struct qxl_fbdev *qfbdev = info->par;
struct qxl_device *qdev = qfbdev->qdev;
struct qxl_fb_image qxl_fb_image;
if (!drm_can_sleep()) {
/* we cannot do any ttm_bo allocation since that will fail on
* ioremap_wc..__get_vm_area_node, so queue the work item
* instead This can happen from printk inside an interrupt
* context, i.e.: smp_apic_timer_interrupt..check_cpu_stall */
qxl_io_log(qdev,
"%s: TODO use RCU, mysterious locks with spin_lock\n",
__func__);
return;
}
/* ensure proper order of rendering operations - TODO: must do this
* for everything. */
qxl_fb_image_init(&qxl_fb_image, qfbdev->qdev, info, image);
qxl_fb_imageblit_safe(&qxl_fb_image);
}
int qxl_fb_init(struct qxl_device *qdev)
{
return 0;
}
static struct fb_ops qxlfb_ops = {
.owner = THIS_MODULE,
.fb_check_var = drm_fb_helper_check_var,
.fb_set_par = drm_fb_helper_set_par, /* TODO: copy vmwgfx */
.fb_fillrect = qxl_fb_fillrect,
.fb_copyarea = qxl_fb_copyarea,
.fb_imageblit = qxl_fb_imageblit,
.fb_pan_display = drm_fb_helper_pan_display,
.fb_blank = drm_fb_helper_blank,
.fb_setcmap = drm_fb_helper_setcmap,
.fb_debug_enter = drm_fb_helper_debug_enter,
.fb_debug_leave = drm_fb_helper_debug_leave,
};
static void qxlfb_destroy_pinned_object(struct drm_gem_object *gobj)
{
struct qxl_bo *qbo = gem_to_qxl_bo(gobj);
int ret;
ret = qxl_bo_reserve(qbo, false);
if (likely(ret == 0)) {
qxl_bo_kunmap(qbo);
qxl_bo_unpin(qbo);
qxl_bo_unreserve(qbo);
}
drm_gem_object_unreference_unlocked(gobj);
}
int qxl_get_handle_for_primary_fb(struct qxl_device *qdev,
struct drm_file *file_priv,
uint32_t *handle)
{
int r;
struct drm_gem_object *gobj = qdev->fbdev_qfb->obj;
BUG_ON(!gobj);
/* drm_get_handle_create adds a reference - good */
r = drm_gem_handle_create(file_priv, gobj, handle);
if (r)
return r;
return 0;
}
static int qxlfb_create_pinned_object(struct qxl_fbdev *qfbdev,
struct drm_mode_fb_cmd2 *mode_cmd,
struct drm_gem_object **gobj_p)
{
struct qxl_device *qdev = qfbdev->qdev;
struct drm_gem_object *gobj = NULL;
struct qxl_bo *qbo = NULL;
int ret;
int aligned_size, size;
int height = mode_cmd->height;
int bpp;
int depth;
drm_fb_get_bpp_depth(mode_cmd->pixel_format, &bpp, &depth);
size = mode_cmd->pitches[0] * height;
aligned_size = ALIGN(size, PAGE_SIZE);
/* TODO: unallocate and reallocate surface0 for real. Hack to just
* have a large enough surface0 for 1024x768 Xorg 32bpp mode */
ret = qxl_gem_object_create(qdev, aligned_size, 0,
QXL_GEM_DOMAIN_SURFACE,
false, /* is discardable */
false, /* is kernel (false means device) */
NULL,
&gobj);
if (ret) {
pr_err("failed to allocate framebuffer (%d)\n",
aligned_size);
return -ENOMEM;
}
qbo = gem_to_qxl_bo(gobj);
qbo->surf.width = mode_cmd->width;
qbo->surf.height = mode_cmd->height;
qbo->surf.stride = mode_cmd->pitches[0];
qbo->surf.format = SPICE_SURFACE_FMT_32_xRGB;
ret = qxl_bo_reserve(qbo, false);
if (unlikely(ret != 0))
goto out_unref;
ret = qxl_bo_pin(qbo, QXL_GEM_DOMAIN_SURFACE, NULL);
if (ret) {
qxl_bo_unreserve(qbo);
goto out_unref;
}
ret = qxl_bo_kmap(qbo, NULL);
qxl_bo_unreserve(qbo); /* unreserve, will be mmaped */
if (ret)
goto out_unref;
*gobj_p = gobj;
return 0;
out_unref:
qxlfb_destroy_pinned_object(gobj);
*gobj_p = NULL;
return ret;
}
static int qxlfb_create(struct qxl_fbdev *qfbdev,
struct drm_fb_helper_surface_size *sizes)
{
struct qxl_device *qdev = qfbdev->qdev;
struct fb_info *info;
struct drm_framebuffer *fb = NULL;
struct drm_mode_fb_cmd2 mode_cmd;
struct drm_gem_object *gobj = NULL;
struct qxl_bo *qbo = NULL;
struct device *device = &qdev->pdev->dev;
int ret;
int size;
int bpp = sizes->surface_bpp;
int depth = sizes->surface_depth;
void *shadow;
mode_cmd.width = sizes->surface_width;
mode_cmd.height = sizes->surface_height;
mode_cmd.pitches[0] = ALIGN(mode_cmd.width * ((bpp + 1) / 8), 64);
mode_cmd.pixel_format = drm_mode_legacy_fb_format(bpp, depth);
ret = qxlfb_create_pinned_object(qfbdev, &mode_cmd, &gobj);
qbo = gem_to_qxl_bo(gobj);
QXL_INFO(qdev, "%s: %dx%d %d\n", __func__, mode_cmd.width,
mode_cmd.height, mode_cmd.pitches[0]);
shadow = vmalloc(mode_cmd.pitches[0] * mode_cmd.height);
/* TODO: what's the usual response to memory allocation errors? */
BUG_ON(!shadow);
QXL_INFO(qdev,
"surface0 at gpu offset %lld, mmap_offset %lld (virt %p, shadow %p)\n",
qxl_bo_gpu_offset(qbo),
qxl_bo_mmap_offset(qbo),
qbo->kptr,
shadow);
size = mode_cmd.pitches[0] * mode_cmd.height;
info = framebuffer_alloc(0, device);
if (info == NULL) {
ret = -ENOMEM;
goto out_unref;
}
info->par = qfbdev;
qxl_framebuffer_init(qdev->ddev, &qfbdev->qfb, &mode_cmd, gobj);
fb = &qfbdev->qfb.base;
/* setup helper with fb data */
qfbdev->helper.fb = fb;
qfbdev->helper.fbdev = info;
qfbdev->shadow = shadow;
strcpy(info->fix.id, "qxldrmfb");
drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT;
info->fbops = &qxlfb_ops;
/*
* TODO: using gobj->size in various places in this function. Not sure
* what the difference between the different sizes is.
*/
info->fix.smem_start = qdev->vram_base; /* TODO - correct? */
info->fix.smem_len = gobj->size;
info->screen_base = qfbdev->shadow;
info->screen_size = gobj->size;
drm_fb_helper_fill_var(info, &qfbdev->helper, sizes->fb_width,
sizes->fb_height);
/* setup aperture base/size for vesafb takeover */
info->apertures = alloc_apertures(1);
if (!info->apertures) {
ret = -ENOMEM;
goto out_unref;
}
info->apertures->ranges[0].base = qdev->ddev->mode_config.fb_base;
info->apertures->ranges[0].size = qdev->vram_size;
info->fix.mmio_start = 0;
info->fix.mmio_len = 0;
if (info->screen_base == NULL) {
ret = -ENOSPC;
goto out_unref;
}
ret = fb_alloc_cmap(&info->cmap, 256, 0);
if (ret) {
ret = -ENOMEM;
goto out_unref;
}
info->fbdefio = &qxl_defio;
fb_deferred_io_init(info);
qdev->fbdev_info = info;
qdev->fbdev_qfb = &qfbdev->qfb;
DRM_INFO("fb mappable at 0x%lX, size %lu\n", info->fix.smem_start, (unsigned long)info->screen_size);
DRM_INFO("fb: depth %d, pitch %d, width %d, height %d\n", fb->depth, fb->pitches[0], fb->width, fb->height);
return 0;
out_unref:
if (qbo) {
ret = qxl_bo_reserve(qbo, false);
if (likely(ret == 0)) {
qxl_bo_kunmap(qbo);
qxl_bo_unpin(qbo);
qxl_bo_unreserve(qbo);
}
}
if (fb && ret) {
drm_gem_object_unreference(gobj);
drm_framebuffer_cleanup(fb);
kfree(fb);
}
drm_gem_object_unreference(gobj);
return ret;
}
static int qxl_fb_find_or_create_single(
struct drm_fb_helper *helper,
struct drm_fb_helper_surface_size *sizes)
{
struct qxl_fbdev *qfbdev = (struct qxl_fbdev *)helper;
int new_fb = 0;
int ret;
if (!helper->fb) {
ret = qxlfb_create(qfbdev, sizes);
if (ret)
return ret;
new_fb = 1;
}
return new_fb;
}
static int qxl_fbdev_destroy(struct drm_device *dev, struct qxl_fbdev *qfbdev)
{
struct fb_info *info;
struct qxl_framebuffer *qfb = &qfbdev->qfb;
if (qfbdev->helper.fbdev) {
info = qfbdev->helper.fbdev;
unregister_framebuffer(info);
framebuffer_release(info);
}
if (qfb->obj) {
qxlfb_destroy_pinned_object(qfb->obj);
qfb->obj = NULL;
}
drm_fb_helper_fini(&qfbdev->helper);
vfree(qfbdev->shadow);
drm_framebuffer_cleanup(&qfb->base);
return 0;
}
static struct drm_fb_helper_funcs qxl_fb_helper_funcs = {
/* TODO
.gamma_set = qxl_crtc_fb_gamma_set,
.gamma_get = qxl_crtc_fb_gamma_get,
*/
.fb_probe = qxl_fb_find_or_create_single,
};
int qxl_fbdev_init(struct qxl_device *qdev)
{
struct qxl_fbdev *qfbdev;
int bpp_sel = 32; /* TODO: parameter from somewhere? */
int ret;
qfbdev = kzalloc(sizeof(struct qxl_fbdev), GFP_KERNEL);
if (!qfbdev)
return -ENOMEM;
qfbdev->qdev = qdev;
qdev->mode_info.qfbdev = qfbdev;
qfbdev->helper.funcs = &qxl_fb_helper_funcs;
ret = drm_fb_helper_init(qdev->ddev, &qfbdev->helper,
1 /* num_crtc - QXL supports just 1 */,
QXLFB_CONN_LIMIT);
if (ret) {
kfree(qfbdev);
return ret;
}
drm_fb_helper_single_add_all_connectors(&qfbdev->helper);
drm_fb_helper_initial_config(&qfbdev->helper, bpp_sel);
return 0;
}
void qxl_fbdev_fini(struct qxl_device *qdev)
{
if (!qdev->mode_info.qfbdev)
return;
qxl_fbdev_destroy(qdev->ddev, qdev->mode_info.qfbdev);
kfree(qdev->mode_info.qfbdev);
qdev->mode_info.qfbdev = NULL;
}