--- /dev/null
+/*
+ * Copyright 2010 Matt Turner.
+ * 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
+ * Matt Turner
+ * 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 "mgag200_drv.h"
+
+static void mga_dirty_update(struct mga_fbdev *mfbdev,
+ int x, int y, int width, int height)
+{
+ int i;
+ struct drm_gem_object *obj;
+ struct mgag200_bo *bo;
+ int src_offset, dst_offset;
+ int bpp = (mfbdev->mfb.base.bits_per_pixel + 7)/8;
+ int ret = -EBUSY;
+ bool unmap = false;
+ bool store_for_later = false;
+ int x2, y2;
+ unsigned long flags;
+
+ obj = mfbdev->mfb.obj;
+ bo = gem_to_mga_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 = mgag200_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(&mfbdev->dirty_lock, flags);
+
+ if (mfbdev->y1 < y)
+ y = mfbdev->y1;
+ if (mfbdev->y2 > y2)
+ y2 = mfbdev->y2;
+ if (mfbdev->x1 < x)
+ x = mfbdev->x1;
+ if (mfbdev->x2 > x2)
+ x2 = mfbdev->x2;
+
+ if (store_for_later) {
+ mfbdev->x1 = x;
+ mfbdev->x2 = x2;
+ mfbdev->y1 = y;
+ mfbdev->y2 = y2;
+ spin_unlock_irqrestore(&mfbdev->dirty_lock, flags);
+ return;
+ }
+
+ mfbdev->x1 = mfbdev->y1 = INT_MAX;
+ mfbdev->x2 = mfbdev->y2 = 0;
+ spin_unlock_irqrestore(&mfbdev->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");
+ mgag200_bo_unreserve(bo);
+ return;
+ }
+ unmap = true;
+ }
+ for (i = y; i <= y2; i++) {
+ /* assume equal stride for now */
+ src_offset = dst_offset = i * mfbdev->mfb.base.pitches[0] + (x * bpp);
+ memcpy_toio(bo->kmap.virtual + src_offset, mfbdev->sysram + src_offset, (x2 - x + 1) * bpp);
+
+ }
+ if (unmap)
+ ttm_bo_kunmap(&bo->kmap);
+
+ mgag200_bo_unreserve(bo);
+}
+
+static void mga_fillrect(struct fb_info *info,
+ const struct fb_fillrect *rect)
+{
+ struct mga_fbdev *mfbdev = info->par;
+ sys_fillrect(info, rect);
+ mga_dirty_update(mfbdev, rect->dx, rect->dy, rect->width,
+ rect->height);
+}
+
+static void mga_copyarea(struct fb_info *info,
+ const struct fb_copyarea *area)
+{
+ struct mga_fbdev *mfbdev = info->par;
+ sys_copyarea(info, area);
+ mga_dirty_update(mfbdev, area->dx, area->dy, area->width,
+ area->height);
+}
+
+static void mga_imageblit(struct fb_info *info,
+ const struct fb_image *image)
+{
+ struct mga_fbdev *mfbdev = info->par;
+ sys_imageblit(info, image);
+ mga_dirty_update(mfbdev, image->dx, image->dy, image->width,
+ image->height);
+}
+
+
+static struct fb_ops mgag200fb_ops = {
+ .owner = THIS_MODULE,
+ .fb_check_var = drm_fb_helper_check_var,
+ .fb_set_par = drm_fb_helper_set_par,
+ .fb_fillrect = mga_fillrect,
+ .fb_copyarea = mga_copyarea,
+ .fb_imageblit = mga_imageblit,
+ .fb_pan_display = drm_fb_helper_pan_display,
+ .fb_blank = drm_fb_helper_blank,
+ .fb_setcmap = drm_fb_helper_setcmap,
+};
+
+static int mgag200fb_create_object(struct mga_fbdev *afbdev,
+ struct drm_mode_fb_cmd2 *mode_cmd,
+ struct drm_gem_object **gobj_p)
+{
+ struct drm_device *dev = afbdev->helper.dev;
+ u32 size;
+ struct drm_gem_object *gobj;
+ int ret = 0;
+
+ size = mode_cmd->pitches[0] * mode_cmd->height;
+ ret = mgag200_gem_create(dev, size, true, &gobj);
+ if (ret)
+ return ret;
+
+ *gobj_p = gobj;
+ return ret;
+}
+
+static int mgag200fb_create(struct drm_fb_helper *helper,
+ struct drm_fb_helper_surface_size *sizes)
+{
+ struct mga_fbdev *mfbdev =
+ container_of(helper, struct mga_fbdev, helper);
+ struct drm_device *dev = mfbdev->helper.dev;
+ struct drm_mode_fb_cmd2 mode_cmd;
+ struct mga_device *mdev = dev->dev_private;
+ struct fb_info *info;
+ struct drm_framebuffer *fb;
+ struct drm_gem_object *gobj = NULL;
+ struct device *device = &dev->pdev->dev;
+ struct mgag200_bo *bo;
+ int ret;
+ void *sysram;
+ int size;
+
+ 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 = mgag200fb_create_object(mfbdev, &mode_cmd, &gobj);
+ if (ret) {
+ DRM_ERROR("failed to create fbcon backing object %d\n", ret);
+ return ret;
+ }
+ bo = gem_to_mga_bo(gobj);
+
+ sysram = vmalloc(size);
+ if (!sysram)
+ return -ENOMEM;
+
+ info = framebuffer_alloc(0, device);
+ if (info == NULL)
+ return -ENOMEM;
+
+ info->par = mfbdev;
+
+ ret = mgag200_framebuffer_init(dev, &mfbdev->mfb, &mode_cmd, gobj);
+ if (ret)
+ return ret;
+
+ mfbdev->sysram = sysram;
+ mfbdev->size = size;
+
+ fb = &mfbdev->mfb.base;
+
+ /* setup helper */
+ mfbdev->helper.fb = fb;
+ mfbdev->helper.fbdev = info;
+
+ 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;
+ }
+
+ strcpy(info->fix.id, "mgadrmfb");
+
+ info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
+ info->fbops = &mgag200fb_ops;
+
+ /* setup aperture base/size for vesafb takeover */
+ info->apertures = alloc_apertures(1);
+ if (!info->apertures) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ info->apertures->ranges[0].base = mdev->dev->mode_config.fb_base;
+ info->apertures->ranges[0].size = mdev->mc.vram_size;
+
+ drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
+ drm_fb_helper_fill_var(info, &mfbdev->helper, sizes->fb_width,
+ sizes->fb_height);
+
+ info->screen_base = sysram;
+ info->screen_size = size;
+ info->pixmap.flags = FB_PIXMAP_SYSTEM;
+
+ DRM_DEBUG_KMS("allocated %dx%d\n",
+ fb->width, fb->height);
+ return 0;
+out:
+ return ret;
+}
+
+static int mga_fbdev_destroy(struct drm_device *dev,
+ struct mga_fbdev *mfbdev)
+{
+ struct fb_info *info;
+ struct mga_framebuffer *mfb = &mfbdev->mfb;
+
+ if (mfbdev->helper.fbdev) {
+ info = mfbdev->helper.fbdev;
+
+ unregister_framebuffer(info);
+ if (info->cmap.len)
+ fb_dealloc_cmap(&info->cmap);
+ framebuffer_release(info);
+ }
+
+ if (mfb->obj) {
+ drm_gem_object_unreference_unlocked(mfb->obj);
+ mfb->obj = NULL;
+ }
+ drm_fb_helper_fini(&mfbdev->helper);
+ vfree(mfbdev->sysram);
+ drm_framebuffer_unregister_private(&mfb->base);
+ drm_framebuffer_cleanup(&mfb->base);
+
+ return 0;
+}
+
+static const struct drm_fb_helper_funcs mga_fb_helper_funcs = {
+ .gamma_set = mga_crtc_fb_gamma_set,
+ .gamma_get = mga_crtc_fb_gamma_get,
+ .fb_probe = mgag200fb_create,
+};
+
+int mgag200_fbdev_init(struct mga_device *mdev)
+{
+ struct mga_fbdev *mfbdev;
+ int ret;
+ int bpp_sel = 32;
+
+ /* prefer 16bpp on low end gpus with limited VRAM */
+ if (IS_G200_SE(mdev) && mdev->mc.vram_size < (2048*1024))
+ bpp_sel = 16;
+
+ mfbdev = devm_kzalloc(mdev->dev->dev, sizeof(struct mga_fbdev), GFP_KERNEL);
+ if (!mfbdev)
+ return -ENOMEM;
+
+ mdev->mfbdev = mfbdev;
+ spin_lock_init(&mfbdev->dirty_lock);
+
+ drm_fb_helper_prepare(mdev->dev, &mfbdev->helper, &mga_fb_helper_funcs);
+
+ ret = drm_fb_helper_init(mdev->dev, &mfbdev->helper,
+ mdev->num_crtc, MGAG200FB_CONN_LIMIT);
+ if (ret)
+ return ret;
+
+ ret = drm_fb_helper_single_add_all_connectors(&mfbdev->helper);
+ if (ret)
+ goto fini;
+
+ /* disable all the possible outputs/crtcs before entering KMS mode */
+ drm_helper_disable_unused_functions(mdev->dev);
+
+ ret = drm_fb_helper_initial_config(&mfbdev->helper, bpp_sel);
+ if (ret)
+ goto fini;
+
+ return 0;
+
+fini:
+ drm_fb_helper_fini(&mfbdev->helper);
+ return ret;
+}
+
+void mgag200_fbdev_fini(struct mga_device *mdev)
+{
+ if (!mdev->mfbdev)
+ return;
+
+ mga_fbdev_destroy(mdev->dev, mdev->mfbdev);
+}
Code Review / kvmfornfv.git / blobdiff