mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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bcb39af448
Okay you don't really want to use udl devices as your console, but if you are unlucky enough to do so, you run into a lot of schedule while atomic due to printk being called from all sorts of funky places. So check if we are in an atomic context, and queue the damage for later, the next printk should cause it to appear. This isn't ideal, but it is simple, and seems to work okay in my testing here. (dirty area idea came from xenfb) fixes a bunch of sleeping while atomic issues running fbcon on udl devices. Cc: stable@vger.kernel.org Signed-off-by: Dave Airlie <airlied@redhat.com>
148 lines
4.5 KiB
C
148 lines
4.5 KiB
C
/*
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* Copyright (C) 2012 Red Hat
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*
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* based in parts on udlfb.c:
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* Copyright (C) 2009 Roberto De Ioris <roberto@unbit.it>
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* Copyright (C) 2009 Jaya Kumar <jayakumar.lkml@gmail.com>
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* Copyright (C) 2009 Bernie Thompson <bernie@plugable.com>
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License v2. See the file COPYING in the main directory of this archive for
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* more details.
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*/
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#ifndef UDL_DRV_H
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#define UDL_DRV_H
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#include <linux/usb.h>
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#define DRIVER_NAME "udl"
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#define DRIVER_DESC "DisplayLink"
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#define DRIVER_DATE "20120220"
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#define DRIVER_MAJOR 0
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#define DRIVER_MINOR 0
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#define DRIVER_PATCHLEVEL 1
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struct udl_device;
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struct urb_node {
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struct list_head entry;
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struct udl_device *dev;
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struct delayed_work release_urb_work;
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struct urb *urb;
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};
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struct urb_list {
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struct list_head list;
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spinlock_t lock;
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struct semaphore limit_sem;
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int available;
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int count;
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size_t size;
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};
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struct udl_fbdev;
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struct udl_device {
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struct device *dev;
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struct drm_device *ddev;
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int sku_pixel_limit;
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struct urb_list urbs;
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atomic_t lost_pixels; /* 1 = a render op failed. Need screen refresh */
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struct udl_fbdev *fbdev;
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char mode_buf[1024];
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uint32_t mode_buf_len;
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atomic_t bytes_rendered; /* raw pixel-bytes driver asked to render */
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atomic_t bytes_identical; /* saved effort with backbuffer comparison */
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atomic_t bytes_sent; /* to usb, after compression including overhead */
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atomic_t cpu_kcycles_used; /* transpired during pixel processing */
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};
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struct udl_gem_object {
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struct drm_gem_object base;
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struct page **pages;
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void *vmapping;
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struct sg_table *sg;
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};
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#define to_udl_bo(x) container_of(x, struct udl_gem_object, base)
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struct udl_framebuffer {
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struct drm_framebuffer base;
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struct udl_gem_object *obj;
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bool active_16; /* active on the 16-bit channel */
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int x1, y1, x2, y2; /* dirty rect */
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spinlock_t dirty_lock;
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};
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#define to_udl_fb(x) container_of(x, struct udl_framebuffer, base)
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/* modeset */
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int udl_modeset_init(struct drm_device *dev);
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void udl_modeset_cleanup(struct drm_device *dev);
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int udl_connector_init(struct drm_device *dev, struct drm_encoder *encoder);
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struct drm_encoder *udl_encoder_init(struct drm_device *dev);
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struct urb *udl_get_urb(struct drm_device *dev);
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int udl_submit_urb(struct drm_device *dev, struct urb *urb, size_t len);
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void udl_urb_completion(struct urb *urb);
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int udl_driver_load(struct drm_device *dev, unsigned long flags);
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int udl_driver_unload(struct drm_device *dev);
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int udl_fbdev_init(struct drm_device *dev);
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void udl_fbdev_cleanup(struct drm_device *dev);
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void udl_fbdev_unplug(struct drm_device *dev);
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struct drm_framebuffer *
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udl_fb_user_fb_create(struct drm_device *dev,
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struct drm_file *file,
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struct drm_mode_fb_cmd2 *mode_cmd);
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int udl_render_hline(struct drm_device *dev, int bpp, struct urb **urb_ptr,
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const char *front, char **urb_buf_ptr,
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u32 byte_offset, u32 device_byte_offset, u32 byte_width,
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int *ident_ptr, int *sent_ptr);
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int udl_dumb_create(struct drm_file *file_priv,
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struct drm_device *dev,
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struct drm_mode_create_dumb *args);
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int udl_gem_mmap(struct drm_file *file_priv, struct drm_device *dev,
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uint32_t handle, uint64_t *offset);
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int udl_dumb_destroy(struct drm_file *file_priv, struct drm_device *dev,
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uint32_t handle);
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int udl_gem_init_object(struct drm_gem_object *obj);
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void udl_gem_free_object(struct drm_gem_object *gem_obj);
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struct udl_gem_object *udl_gem_alloc_object(struct drm_device *dev,
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size_t size);
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struct drm_gem_object *udl_gem_prime_import(struct drm_device *dev,
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struct dma_buf *dma_buf);
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int udl_gem_vmap(struct udl_gem_object *obj);
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void udl_gem_vunmap(struct udl_gem_object *obj);
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int udl_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
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int udl_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf);
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int udl_handle_damage(struct udl_framebuffer *fb, int x, int y,
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int width, int height);
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int udl_drop_usb(struct drm_device *dev);
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#define CMD_WRITE_RAW8 "\xAF\x60" /**< 8 bit raw write command. */
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#define CMD_WRITE_RL8 "\xAF\x61" /**< 8 bit run length command. */
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#define CMD_WRITE_COPY8 "\xAF\x62" /**< 8 bit copy command. */
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#define CMD_WRITE_RLX8 "\xAF\x63" /**< 8 bit extended run length command. */
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#define CMD_WRITE_RAW16 "\xAF\x68" /**< 16 bit raw write command. */
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#define CMD_WRITE_RL16 "\xAF\x69" /**< 16 bit run length command. */
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#define CMD_WRITE_COPY16 "\xAF\x6A" /**< 16 bit copy command. */
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#define CMD_WRITE_RLX16 "\xAF\x6B" /**< 16 bit extended run length command. */
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#endif
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