--- /dev/null
+/*
+ * Copyright 2012 Red Hat
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License version 2. See the file COPYING in the main
+ * directory of this archive for more details.
+ *
+ * Authors: Matthew Garrett
+ * Dave Airlie
+ */
+#include <linux/module.h>
+#include <drm/drmP.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_crtc_helper.h>
+
+#include <linux/fb.h>
+
+#include "cirrus_drv.h"
+
+static void cirrus_dirty_update(struct cirrus_fbdev *afbdev,
+ int x, int y, int width, int height)
+{
+ int i;
+ struct drm_gem_object *obj;
+ struct cirrus_bo *bo;
+ int src_offset, dst_offset;
+ int bpp = (afbdev->gfb.base.bits_per_pixel + 7)/8;
+ int ret = -EBUSY;
+ bool unmap = false;
+ bool store_for_later = false;
+ int x2, y2;
+ unsigned long flags;
+
+ obj = afbdev->gfb.obj;
+ bo = gem_to_cirrus_bo(obj);
+
+ /*
+ * try and reserve the BO, if we fail with busy
+ * then the BO is being moved and we should
+ * store up the damage until later.
+ */
+ if (drm_can_sleep())
+ ret = cirrus_bo_reserve(bo, true);
+ if (ret) {
+ if (ret != -EBUSY)
+ return;
+ store_for_later = true;
+ }
+
+ x2 = x + width - 1;
+ y2 = y + height - 1;
+ spin_lock_irqsave(&afbdev->dirty_lock, flags);
+
+ if (afbdev->y1 < y)
+ y = afbdev->y1;
+ if (afbdev->y2 > y2)
+ y2 = afbdev->y2;
+ if (afbdev->x1 < x)
+ x = afbdev->x1;
+ if (afbdev->x2 > x2)
+ x2 = afbdev->x2;
+
+ if (store_for_later) {
+ afbdev->x1 = x;
+ afbdev->x2 = x2;
+ afbdev->y1 = y;
+ afbdev->y2 = y2;
+ spin_unlock_irqrestore(&afbdev->dirty_lock, flags);
+ return;
+ }
+
+ afbdev->x1 = afbdev->y1 = INT_MAX;
+ afbdev->x2 = afbdev->y2 = 0;
+ spin_unlock_irqrestore(&afbdev->dirty_lock, flags);
+
+ if (!bo->kmap.virtual) {
+ ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap);
+ if (ret) {
+ DRM_ERROR("failed to kmap fb updates\n");
+ cirrus_bo_unreserve(bo);
+ return;
+ }
+ unmap = true;
+ }
+ for (i = y; i < y + height; i++) {
+ /* assume equal stride for now */
+ src_offset = dst_offset = i * afbdev->gfb.base.pitches[0] + (x * bpp);
+ memcpy_toio(bo->kmap.virtual + src_offset, afbdev->sysram + src_offset, width * bpp);
+
+ }
+ if (unmap)
+ ttm_bo_kunmap(&bo->kmap);
+
+ cirrus_bo_unreserve(bo);
+}
+
+static void cirrus_fillrect(struct fb_info *info,
+ const struct fb_fillrect *rect)
+{
+ struct cirrus_fbdev *afbdev = info->par;
+ sys_fillrect(info, rect);
+ cirrus_dirty_update(afbdev, rect->dx, rect->dy, rect->width,
+ rect->height);
+}
+
+static void cirrus_copyarea(struct fb_info *info,
+ const struct fb_copyarea *area)
+{
+ struct cirrus_fbdev *afbdev = info->par;
+ sys_copyarea(info, area);
+ cirrus_dirty_update(afbdev, area->dx, area->dy, area->width,
+ area->height);
+}
+
+static void cirrus_imageblit(struct fb_info *info,
+ const struct fb_image *image)
+{
+ struct cirrus_fbdev *afbdev = info->par;
+ sys_imageblit(info, image);
+ cirrus_dirty_update(afbdev, image->dx, image->dy, image->width,
+ image->height);
+}
+
+
+static struct fb_ops cirrusfb_ops = {
+ .owner = THIS_MODULE,
+ .fb_check_var = drm_fb_helper_check_var,
+ .fb_set_par = drm_fb_helper_set_par,
+ .fb_fillrect = cirrus_fillrect,
+ .fb_copyarea = cirrus_copyarea,
+ .fb_imageblit = cirrus_imageblit,
+ .fb_pan_display = drm_fb_helper_pan_display,
+ .fb_blank = drm_fb_helper_blank,
+ .fb_setcmap = drm_fb_helper_setcmap,
+};
+
+static int cirrusfb_create_object(struct cirrus_fbdev *afbdev,
+ struct drm_mode_fb_cmd2 *mode_cmd,
+ struct drm_gem_object **gobj_p)
+{
+ struct drm_device *dev = afbdev->helper.dev;
+ struct cirrus_device *cdev = dev->dev_private;
+ u32 bpp, depth;
+ u32 size;
+ struct drm_gem_object *gobj;
+
+ int ret = 0;
+ drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);
+
+ if (!cirrus_check_framebuffer(cdev, mode_cmd->width, mode_cmd->height,
+ bpp, mode_cmd->pitches[0]))
+ return -EINVAL;
+
+ size = mode_cmd->pitches[0] * mode_cmd->height;
+ ret = cirrus_gem_create(dev, size, true, &gobj);
+ if (ret)
+ return ret;
+
+ *gobj_p = gobj;
+ return ret;
+}
+
+static int cirrusfb_create(struct drm_fb_helper *helper,
+ struct drm_fb_helper_surface_size *sizes)
+{
+ struct cirrus_fbdev *gfbdev =
+ container_of(helper, struct cirrus_fbdev, helper);
+ struct drm_device *dev = gfbdev->helper.dev;
+ struct cirrus_device *cdev = gfbdev->helper.dev->dev_private;
+ struct fb_info *info;
+ struct drm_framebuffer *fb;
+ struct drm_mode_fb_cmd2 mode_cmd;
+ struct device *device = &dev->pdev->dev;
+ void *sysram;
+ struct drm_gem_object *gobj = NULL;
+ struct cirrus_bo *bo = NULL;
+ int size, ret;
+
+ mode_cmd.width = sizes->surface_width;
+ mode_cmd.height = sizes->surface_height;
+ mode_cmd.pitches[0] = mode_cmd.width * ((sizes->surface_bpp + 7) / 8);
+ mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
+ sizes->surface_depth);
+ size = mode_cmd.pitches[0] * mode_cmd.height;
+
+ ret = cirrusfb_create_object(gfbdev, &mode_cmd, &gobj);
+ if (ret) {
+ DRM_ERROR("failed to create fbcon backing object %d\n", ret);
+ return ret;
+ }
+
+ bo = gem_to_cirrus_bo(gobj);
+
+ sysram = vmalloc(size);
+ if (!sysram)
+ return -ENOMEM;
+
+ info = framebuffer_alloc(0, device);
+ if (info == NULL)
+ return -ENOMEM;
+
+ info->par = gfbdev;
+
+ ret = cirrus_framebuffer_init(cdev->dev, &gfbdev->gfb, &mode_cmd, gobj);
+ if (ret)
+ return ret;
+
+ gfbdev->sysram = sysram;
+ gfbdev->size = size;
+
+ fb = &gfbdev->gfb.base;
+ if (!fb) {
+ DRM_INFO("fb is NULL\n");
+ return -EINVAL;
+ }
+
+ /* setup helper */
+ gfbdev->helper.fb = fb;
+ gfbdev->helper.fbdev = info;
+
+ strcpy(info->fix.id, "cirrusdrmfb");
+
+
+ info->flags = FBINFO_DEFAULT;
+ info->fbops = &cirrusfb_ops;
+
+ drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
+ drm_fb_helper_fill_var(info, &gfbdev->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_iounmap;
+ }
+ info->apertures->ranges[0].base = cdev->dev->mode_config.fb_base;
+ info->apertures->ranges[0].size = cdev->mc.vram_size;
+
+ info->fix.smem_start = cdev->dev->mode_config.fb_base;
+ info->fix.smem_len = cdev->mc.vram_size;
+
+ info->screen_base = sysram;
+ info->screen_size = size;
+
+ info->fix.mmio_start = 0;
+ info->fix.mmio_len = 0;
+
+ ret = fb_alloc_cmap(&info->cmap, 256, 0);
+ if (ret) {
+ DRM_ERROR("%s: can't allocate color map\n", info->fix.id);
+ ret = -ENOMEM;
+ goto out_iounmap;
+ }
+
+ DRM_INFO("fb mappable at 0x%lX\n", info->fix.smem_start);
+ DRM_INFO("vram aper at 0x%lX\n", (unsigned long)info->fix.smem_start);
+ DRM_INFO("size %lu\n", (unsigned long)info->fix.smem_len);
+ DRM_INFO("fb depth is %d\n", fb->depth);
+ DRM_INFO(" pitch is %d\n", fb->pitches[0]);
+
+ return 0;
+out_iounmap:
+ return ret;
+}
+
+static int cirrus_fbdev_destroy(struct drm_device *dev,
+ struct cirrus_fbdev *gfbdev)
+{
+ struct fb_info *info;
+ struct cirrus_framebuffer *gfb = &gfbdev->gfb;
+
+ if (gfbdev->helper.fbdev) {
+ info = gfbdev->helper.fbdev;
+
+ unregister_framebuffer(info);
+ if (info->cmap.len)
+ fb_dealloc_cmap(&info->cmap);
+ framebuffer_release(info);
+ }
+
+ if (gfb->obj) {
+ drm_gem_object_unreference_unlocked(gfb->obj);
+ gfb->obj = NULL;
+ }
+
+ vfree(gfbdev->sysram);
+ drm_fb_helper_fini(&gfbdev->helper);
+ drm_framebuffer_unregister_private(&gfb->base);
+ drm_framebuffer_cleanup(&gfb->base);
+
+ return 0;
+}
+
+static const struct drm_fb_helper_funcs cirrus_fb_helper_funcs = {
+ .gamma_set = cirrus_crtc_fb_gamma_set,
+ .gamma_get = cirrus_crtc_fb_gamma_get,
+ .fb_probe = cirrusfb_create,
+};
+
+int cirrus_fbdev_init(struct cirrus_device *cdev)
+{
+ struct cirrus_fbdev *gfbdev;
+ int ret;
+ int bpp_sel = 24;
+
+ /*bpp_sel = 8;*/
+ gfbdev = kzalloc(sizeof(struct cirrus_fbdev), GFP_KERNEL);
+ if (!gfbdev)
+ return -ENOMEM;
+
+ cdev->mode_info.gfbdev = gfbdev;
+ spin_lock_init(&gfbdev->dirty_lock);
+
+ drm_fb_helper_prepare(cdev->dev, &gfbdev->helper,
+ &cirrus_fb_helper_funcs);
+
+ ret = drm_fb_helper_init(cdev->dev, &gfbdev->helper,
+ cdev->num_crtc, CIRRUSFB_CONN_LIMIT);
+ if (ret)
+ return ret;
+
+ ret = drm_fb_helper_single_add_all_connectors(&gfbdev->helper);
+ if (ret)
+ return ret;
+
+ /* disable all the possible outputs/crtcs before entering KMS mode */
+ drm_helper_disable_unused_functions(cdev->dev);
+
+ return drm_fb_helper_initial_config(&gfbdev->helper, bpp_sel);
+}
+
+void cirrus_fbdev_fini(struct cirrus_device *cdev)
+{
+ if (!cdev->mode_info.gfbdev)
+ return;
+
+ cirrus_fbdev_destroy(cdev->dev, cdev->mode_info.gfbdev);
+ kfree(cdev->mode_info.gfbdev);
+ cdev->mode_info.gfbdev = NULL;
+}
Code Review / kvmfornfv.git / blobdiff