diff options
Diffstat (limited to 'drivers/gpu/drm/udl/udl_fb.c')
| -rw-r--r-- | drivers/gpu/drm/udl/udl_fb.c | 527 |
1 files changed, 0 insertions, 527 deletions
diff --git a/drivers/gpu/drm/udl/udl_fb.c b/drivers/gpu/drm/udl/udl_fb.c deleted file mode 100644 index ef3504d06343..000000000000 --- a/drivers/gpu/drm/udl/udl_fb.c +++ /dev/null @@ -1,527 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * Copyright (C) 2012 Red Hat - * - * based in parts on udlfb.c: - * Copyright (C) 2009 Roberto De Ioris <roberto@unbit.it> - * Copyright (C) 2009 Jaya Kumar <jayakumar.lkml@gmail.com> - * Copyright (C) 2009 Bernie Thompson <bernie@plugable.com> - */ - -#include <linux/moduleparam.h> -#include <linux/dma-buf.h> - -#include <drm/drm_crtc_helper.h> -#include <drm/drm_drv.h> -#include <drm/drm_fb_helper.h> -#include <drm/drm_fourcc.h> -#include <drm/drm_modeset_helper.h> - -#include "udl_drv.h" - -#define DL_DEFIO_WRITE_DELAY (HZ/20) /* fb_deferred_io.delay in jiffies */ - -static int fb_defio = 0; /* Optionally enable experimental fb_defio mmap support */ -static int fb_bpp = 16; - -module_param(fb_bpp, int, S_IWUSR | S_IRUSR | S_IWGRP | S_IRGRP); -module_param(fb_defio, int, S_IWUSR | S_IRUSR | S_IWGRP | S_IRGRP); - -struct udl_fbdev { - struct drm_fb_helper helper; /* must be first */ - struct udl_framebuffer ufb; - int fb_count; -}; - -#define DL_ALIGN_UP(x, a) ALIGN(x, a) -#define DL_ALIGN_DOWN(x, a) ALIGN_DOWN(x, a) - -/** Read the red component (0..255) of a 32 bpp colour. */ -#define DLO_RGB_GETRED(col) (uint8_t)((col) & 0xFF) - -/** Read the green component (0..255) of a 32 bpp colour. */ -#define DLO_RGB_GETGRN(col) (uint8_t)(((col) >> 8) & 0xFF) - -/** Read the blue component (0..255) of a 32 bpp colour. */ -#define DLO_RGB_GETBLU(col) (uint8_t)(((col) >> 16) & 0xFF) - -/** Return red/green component of a 16 bpp colour number. */ -#define DLO_RG16(red, grn) (uint8_t)((((red) & 0xF8) | ((grn) >> 5)) & 0xFF) - -/** Return green/blue component of a 16 bpp colour number. */ -#define DLO_GB16(grn, blu) (uint8_t)(((((grn) & 0x1C) << 3) | ((blu) >> 3)) & 0xFF) - -/** Return 8 bpp colour number from red, green and blue components. */ -#define DLO_RGB8(red, grn, blu) ((((red) << 5) | (((grn) & 3) << 3) | ((blu) & 7)) & 0xFF) - -#if 0 -static uint8_t rgb8(uint32_t col) -{ - uint8_t red = DLO_RGB_GETRED(col); - uint8_t grn = DLO_RGB_GETGRN(col); - uint8_t blu = DLO_RGB_GETBLU(col); - - return DLO_RGB8(red, grn, blu); -} - -static uint16_t rgb16(uint32_t col) -{ - uint8_t red = DLO_RGB_GETRED(col); - uint8_t grn = DLO_RGB_GETGRN(col); - uint8_t blu = DLO_RGB_GETBLU(col); - - return (DLO_RG16(red, grn) << 8) + DLO_GB16(grn, blu); -} -#endif - -int udl_handle_damage(struct udl_framebuffer *fb, int x, int y, - int width, int height) -{ - struct drm_device *dev = fb->base.dev; - struct udl_device *udl = to_udl(dev); - int i, ret; - char *cmd; - cycles_t start_cycles, end_cycles; - int bytes_sent = 0; - int bytes_identical = 0; - struct urb *urb; - int aligned_x; - int log_bpp; - - BUG_ON(!is_power_of_2(fb->base.format->cpp[0])); - log_bpp = __ffs(fb->base.format->cpp[0]); - - if (!fb->active_16) - return 0; - - if (!fb->obj->vmapping) { - ret = udl_gem_vmap(fb->obj); - if (ret == -ENOMEM) { - DRM_ERROR("failed to vmap fb\n"); - return 0; - } - if (!fb->obj->vmapping) { - DRM_ERROR("failed to vmapping\n"); - return 0; - } - } - - aligned_x = DL_ALIGN_DOWN(x, sizeof(unsigned long)); - width = DL_ALIGN_UP(width + (x-aligned_x), sizeof(unsigned long)); - x = aligned_x; - - if ((width <= 0) || - (x + width > fb->base.width) || - (y + height > fb->base.height)) - return -EINVAL; - - start_cycles = get_cycles(); - - urb = udl_get_urb(dev); - if (!urb) - return 0; - cmd = urb->transfer_buffer; - - for (i = y; i < y + height ; i++) { - const int line_offset = fb->base.pitches[0] * i; - const int byte_offset = line_offset + (x << log_bpp); - const int dev_byte_offset = (fb->base.width * i + x) << log_bpp; - if (udl_render_hline(dev, log_bpp, &urb, - (char *) fb->obj->vmapping, - &cmd, byte_offset, dev_byte_offset, - width << log_bpp, - &bytes_identical, &bytes_sent)) - goto error; - } - - if (cmd > (char *) urb->transfer_buffer) { - /* Send partial buffer remaining before exiting */ - int len; - if (cmd < (char *) urb->transfer_buffer + urb->transfer_buffer_length) - *cmd++ = 0xAF; - len = cmd - (char *) urb->transfer_buffer; - ret = udl_submit_urb(dev, urb, len); - bytes_sent += len; - } else - udl_urb_completion(urb); - -error: - atomic_add(bytes_sent, &udl->bytes_sent); - atomic_add(bytes_identical, &udl->bytes_identical); - atomic_add((width * height) << log_bpp, &udl->bytes_rendered); - end_cycles = get_cycles(); - atomic_add(((unsigned int) ((end_cycles - start_cycles) - >> 10)), /* Kcycles */ - &udl->cpu_kcycles_used); - - return 0; -} - -static int udl_fb_mmap(struct fb_info *info, struct vm_area_struct *vma) -{ - unsigned long start = vma->vm_start; - unsigned long size = vma->vm_end - vma->vm_start; - unsigned long offset; - unsigned long page, pos; - - if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) - return -EINVAL; - - offset = vma->vm_pgoff << PAGE_SHIFT; - - if (offset > info->fix.smem_len || size > info->fix.smem_len - offset) - return -EINVAL; - - pos = (unsigned long)info->fix.smem_start + offset; - - pr_debug("mmap() framebuffer addr:%lu size:%lu\n", - pos, size); - - /* We don't want the framebuffer to be mapped encrypted */ - vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot); - - while (size > 0) { - page = vmalloc_to_pfn((void *)pos); - if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED)) - return -EAGAIN; - - start += PAGE_SIZE; - pos += PAGE_SIZE; - if (size > PAGE_SIZE) - size -= PAGE_SIZE; - else - size = 0; - } - - /* VM_IO | VM_DONTEXPAND | VM_DONTDUMP are set by remap_pfn_range() */ - return 0; -} - -/* - * It's common for several clients to have framebuffer open simultaneously. - * e.g. both fbcon and X. Makes things interesting. - * Assumes caller is holding info->lock (for open and release at least) - */ -static int udl_fb_open(struct fb_info *info, int user) -{ - struct udl_fbdev *ufbdev = info->par; - struct drm_device *dev = ufbdev->ufb.base.dev; - struct udl_device *udl = to_udl(dev); - - /* If the USB device is gone, we don't accept new opens */ - if (drm_dev_is_unplugged(&udl->drm)) - return -ENODEV; - - ufbdev->fb_count++; - -#ifdef CONFIG_DRM_FBDEV_EMULATION - if (fb_defio && (info->fbdefio == NULL)) { - /* enable defio at last moment if not disabled by client */ - - struct fb_deferred_io *fbdefio; - - fbdefio = kzalloc(sizeof(struct fb_deferred_io), GFP_KERNEL); - - if (fbdefio) { - fbdefio->delay = DL_DEFIO_WRITE_DELAY; - fbdefio->deferred_io = drm_fb_helper_deferred_io; - } - - info->fbdefio = fbdefio; - fb_deferred_io_init(info); - } -#endif - - pr_debug("open /dev/fb%d user=%d fb_info=%p count=%d\n", - info->node, user, info, ufbdev->fb_count); - - return 0; -} - - -/* - * Assumes caller is holding info->lock mutex (for open and release at least) - */ -static int udl_fb_release(struct fb_info *info, int user) -{ - struct udl_fbdev *ufbdev = info->par; - - ufbdev->fb_count--; - -#ifdef CONFIG_DRM_FBDEV_EMULATION - if ((ufbdev->fb_count == 0) && (info->fbdefio)) { - fb_deferred_io_cleanup(info); - kfree(info->fbdefio); - info->fbdefio = NULL; - info->fbops->fb_mmap = udl_fb_mmap; - } -#endif - - pr_debug("released /dev/fb%d user=%d count=%d\n", - info->node, user, ufbdev->fb_count); - - return 0; -} - -static struct fb_ops udlfb_ops = { - .owner = THIS_MODULE, - DRM_FB_HELPER_DEFAULT_OPS, - .fb_fillrect = drm_fb_helper_sys_fillrect, - .fb_copyarea = drm_fb_helper_sys_copyarea, - .fb_imageblit = drm_fb_helper_sys_imageblit, - .fb_mmap = udl_fb_mmap, - .fb_open = udl_fb_open, - .fb_release = udl_fb_release, -}; - -static int udl_user_framebuffer_dirty(struct drm_framebuffer *fb, - struct drm_file *file, - unsigned flags, unsigned color, - struct drm_clip_rect *clips, - unsigned num_clips) -{ - struct udl_framebuffer *ufb = to_udl_fb(fb); - int i; - int ret = 0; - - drm_modeset_lock_all(fb->dev); - - if (!ufb->active_16) - goto unlock; - - if (ufb->obj->base.import_attach) { - ret = dma_buf_begin_cpu_access(ufb->obj->base.import_attach->dmabuf, - DMA_FROM_DEVICE); - if (ret) - goto unlock; - } - - for (i = 0; i < num_clips; i++) { - ret = udl_handle_damage(ufb, clips[i].x1, clips[i].y1, - clips[i].x2 - clips[i].x1, - clips[i].y2 - clips[i].y1); - if (ret) - break; - } - - if (ufb->obj->base.import_attach) { - ret = dma_buf_end_cpu_access(ufb->obj->base.import_attach->dmabuf, - DMA_FROM_DEVICE); - } - - unlock: - drm_modeset_unlock_all(fb->dev); - - return ret; -} - -static void udl_user_framebuffer_destroy(struct drm_framebuffer *fb) -{ - struct udl_framebuffer *ufb = to_udl_fb(fb); - - if (ufb->obj) - drm_gem_object_put_unlocked(&ufb->obj->base); - - drm_framebuffer_cleanup(fb); - kfree(ufb); -} - -static const struct drm_framebuffer_funcs udlfb_funcs = { - .destroy = udl_user_framebuffer_destroy, - .dirty = udl_user_framebuffer_dirty, -}; - - -static int -udl_framebuffer_init(struct drm_device *dev, - struct udl_framebuffer *ufb, - const struct drm_mode_fb_cmd2 *mode_cmd, - struct udl_gem_object *obj) -{ - int ret; - - ufb->obj = obj; - drm_helper_mode_fill_fb_struct(dev, &ufb->base, mode_cmd); - ret = drm_framebuffer_init(dev, &ufb->base, &udlfb_funcs); - return ret; -} - - -static int udlfb_create(struct drm_fb_helper *helper, - struct drm_fb_helper_surface_size *sizes) -{ - struct udl_fbdev *ufbdev = - container_of(helper, struct udl_fbdev, helper); - struct drm_device *dev = ufbdev->helper.dev; - struct fb_info *info; - struct drm_framebuffer *fb; - struct drm_mode_fb_cmd2 mode_cmd; - struct udl_gem_object *obj; - uint32_t size; - int ret = 0; - - if (sizes->surface_bpp == 24) - sizes->surface_bpp = 32; - - 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; - size = ALIGN(size, PAGE_SIZE); - - obj = udl_gem_alloc_object(dev, size); - if (!obj) - goto out; - - ret = udl_gem_vmap(obj); - if (ret) { - DRM_ERROR("failed to vmap fb\n"); - goto out_gfree; - } - - info = drm_fb_helper_alloc_fbi(helper); - if (IS_ERR(info)) { - ret = PTR_ERR(info); - goto out_gfree; - } - - ret = udl_framebuffer_init(dev, &ufbdev->ufb, &mode_cmd, obj); - if (ret) - goto out_gfree; - - fb = &ufbdev->ufb.base; - - ufbdev->helper.fb = fb; - - info->screen_base = ufbdev->ufb.obj->vmapping; - info->fix.smem_len = size; - info->fix.smem_start = (unsigned long)ufbdev->ufb.obj->vmapping; - - info->fbops = &udlfb_ops; - drm_fb_helper_fill_info(info, &ufbdev->helper, sizes); - - DRM_DEBUG_KMS("allocated %dx%d vmal %p\n", - fb->width, fb->height, - ufbdev->ufb.obj->vmapping); - - return ret; -out_gfree: - drm_gem_object_put_unlocked(&ufbdev->ufb.obj->base); -out: - return ret; -} - -static const struct drm_fb_helper_funcs udl_fb_helper_funcs = { - .fb_probe = udlfb_create, -}; - -static void udl_fbdev_destroy(struct drm_device *dev, - struct udl_fbdev *ufbdev) -{ - drm_fb_helper_unregister_fbi(&ufbdev->helper); - drm_fb_helper_fini(&ufbdev->helper); - if (ufbdev->ufb.obj) { - drm_framebuffer_unregister_private(&ufbdev->ufb.base); - drm_framebuffer_cleanup(&ufbdev->ufb.base); - drm_gem_object_put_unlocked(&ufbdev->ufb.obj->base); - } -} - -int udl_fbdev_init(struct drm_device *dev) -{ - struct udl_device *udl = to_udl(dev); - int bpp_sel = fb_bpp; - struct udl_fbdev *ufbdev; - int ret; - - ufbdev = kzalloc(sizeof(struct udl_fbdev), GFP_KERNEL); - if (!ufbdev) - return -ENOMEM; - - udl->fbdev = ufbdev; - - drm_fb_helper_prepare(dev, &ufbdev->helper, &udl_fb_helper_funcs); - - ret = drm_fb_helper_init(dev, &ufbdev->helper, 1); - if (ret) - goto free; - - ret = drm_fb_helper_single_add_all_connectors(&ufbdev->helper); - if (ret) - goto fini; - - /* disable all the possible outputs/crtcs before entering KMS mode */ - drm_helper_disable_unused_functions(dev); - - ret = drm_fb_helper_initial_config(&ufbdev->helper, bpp_sel); - if (ret) - goto fini; - - return 0; - -fini: - drm_fb_helper_fini(&ufbdev->helper); -free: - kfree(ufbdev); - return ret; -} - -void udl_fbdev_cleanup(struct drm_device *dev) -{ - struct udl_device *udl = to_udl(dev); - if (!udl->fbdev) - return; - - udl_fbdev_destroy(dev, udl->fbdev); - kfree(udl->fbdev); - udl->fbdev = NULL; -} - -void udl_fbdev_unplug(struct drm_device *dev) -{ - struct udl_device *udl = to_udl(dev); - struct udl_fbdev *ufbdev; - if (!udl->fbdev) - return; - - ufbdev = udl->fbdev; - drm_fb_helper_unlink_fbi(&ufbdev->helper); -} - -struct drm_framebuffer * -udl_fb_user_fb_create(struct drm_device *dev, - struct drm_file *file, - const struct drm_mode_fb_cmd2 *mode_cmd) -{ - struct drm_gem_object *obj; - struct udl_framebuffer *ufb; - int ret; - uint32_t size; - - obj = drm_gem_object_lookup(file, mode_cmd->handles[0]); - if (obj == NULL) - return ERR_PTR(-ENOENT); - - size = mode_cmd->pitches[0] * mode_cmd->height; - size = ALIGN(size, PAGE_SIZE); - - if (size > obj->size) { - DRM_ERROR("object size not sufficient for fb %d %zu %d %d\n", size, obj->size, mode_cmd->pitches[0], mode_cmd->height); - return ERR_PTR(-ENOMEM); - } - - ufb = kzalloc(sizeof(*ufb), GFP_KERNEL); - if (ufb == NULL) - return ERR_PTR(-ENOMEM); - - ret = udl_framebuffer_init(dev, ufb, mode_cmd, to_udl_bo(obj)); - if (ret) { - kfree(ufb); - return ERR_PTR(-EINVAL); - } - return &ufb->base; -} |