+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Copyright 2010 Matt Turner.
- * Copyright 2012 Red Hat
- *
- * Authors: Matthew Garrett
- * Matt Turner
- * Dave Airlie
- */
-
-#include <linux/module.h>
-#include <linux/vmalloc.h>
-
-#include <drm/drm_crtc_helper.h>
-#include <drm/drm_fb_helper.h>
-#include <drm/drm_fourcc.h>
-#include <drm/drm_gem_framebuffer_helper.h>
-#include <drm/drm_util.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_vram_object *gbo;
- int src_offset, dst_offset;
- int ret;
- u8 *dst;
- bool unmap = false;
- bool store_for_later = false;
- int x2, y2;
- unsigned long flags;
- struct drm_framebuffer *fb = mfbdev->helper.fb;
- int bpp = fb->format->cpp[0];
-
- gbo = drm_gem_vram_of_gem(fb->obj[0]);
-
- if (drm_can_sleep()) {
- /* We pin the BO so it won't be moved during the
- * update. The actual location, video RAM or system
- * memory, is not important.
- */
- ret = drm_gem_vram_pin(gbo, 0);
- if (ret) {
- if (ret != -EBUSY)
- return;
- store_for_later = true;
- }
- } else {
- 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);
-
- dst = drm_gem_vram_kmap(gbo, false, NULL);
- if (IS_ERR(dst)) {
- DRM_ERROR("failed to kmap fb updates\n");
- goto out;
- } else if (!dst) {
- dst = drm_gem_vram_kmap(gbo, true, NULL);
- if (IS_ERR(dst)) {
- DRM_ERROR("failed to kmap fb updates\n");
- goto out;
- }
- unmap = true;
- }
-
- for (i = y; i <= y2; i++) {
- /* assume equal stride for now */
- src_offset = dst_offset = i * fb->pitches[0] + (x * bpp);
- memcpy_toio(dst + dst_offset, mfbdev->sysram + src_offset,
- (x2 - x + 1) * bpp);
- }
-
- if (unmap)
- drm_gem_vram_kunmap(gbo);
-
-out:
- drm_gem_vram_unpin(gbo);
-}
-
-static void mga_fillrect(struct fb_info *info,
- const struct fb_fillrect *rect)
-{
- struct mga_fbdev *mfbdev = info->par;
- drm_fb_helper_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;
- drm_fb_helper_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;
- drm_fb_helper_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,
- const 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;
- 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;
- }
-
- sysram = vmalloc(size);
- if (!sysram) {
- ret = -ENOMEM;
- goto err_drm_gem_object_put_unlocked;
- }
-
- info = drm_fb_helper_alloc_fbi(helper);
- if (IS_ERR(info)) {
- ret = PTR_ERR(info);
- goto err_vfree;
- }
-
- fb = drm_gem_fbdev_fb_create(dev, sizes, 0, gobj, NULL);
- if (IS_ERR(fb)) {
- ret = PTR_ERR(fb);
- goto err_vfree;
- }
-
- mfbdev->sysram = sysram;
- mfbdev->size = size;
-
- /* setup helper */
- mfbdev->helper.fb = fb;
-
- info->fbops = &mgag200fb_ops;
-
- /* setup aperture base/size for vesafb takeover */
- info->apertures->ranges[0].base = mdev->dev->mode_config.fb_base;
- info->apertures->ranges[0].size = mdev->mc.vram_size;
-
- drm_fb_helper_fill_info(info, &mfbdev->helper, sizes);
-
- 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;
-
-err_vfree:
- vfree(sysram);
-err_drm_gem_object_put_unlocked:
- drm_gem_object_put_unlocked(gobj);
- return ret;
-}
-
-static int mga_fbdev_destroy(struct drm_device *dev,
- struct mga_fbdev *mfbdev)
-{
- drm_fb_helper_unregister_fbi(&mfbdev->helper);
- drm_fb_helper_fini(&mfbdev->helper);
- drm_framebuffer_put(mfbdev->helper.fb);
-
- vfree(mfbdev->sysram);
-
- return 0;
-}
-
-static const struct drm_fb_helper_funcs mga_fb_helper_funcs = {
- .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,
- MGAG200FB_CONN_LIMIT);
- if (ret)
- goto err_fb_helper;
-
- ret = drm_fb_helper_single_add_all_connectors(&mfbdev->helper);
- if (ret)
- goto err_fb_setup;
-
- /* 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 err_fb_setup;
-
- return 0;
-
-err_fb_setup:
- drm_fb_helper_fini(&mfbdev->helper);
-err_fb_helper:
- mdev->mfbdev = NULL;
-
- return ret;
-}
-
-void mgag200_fbdev_fini(struct mga_device *mdev)
-{
- if (!mdev->mfbdev)
- return;
-
- mga_fbdev_destroy(mdev->dev, mdev->mfbdev);
-}
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