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linux_dsm_epyc7002/drivers/gpu/drm/omapdrm/omap_drv.h
Tomi Valkeinen 76c4055f2c drm/omap: fix race condition with dev->obj_list 
omap_gem_objects are added to dev->obj_list in omap_gem_new, and removed
in omap_gem_free_object. Unfortunately there's no locking for
dev->obj_list, which eventually leads to a crash:

WARNING: CPU: 1 PID: 1123 at lib/list_debug.c:59 __list_del_entry+0xa4/0xe0()
list_del corruption. prev->next should be e9281344, but was ea722b84

Add a spinlock to protect dev->obj_list.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
2015-03-24 13:50:58 +02:00

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/*
* drivers/gpu/drm/omapdrm/omap_drv.h
*
* Copyright (C) 2011 Texas Instruments
* Author: Rob Clark <rob@ti.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __OMAP_DRV_H__
#define __OMAP_DRV_H__
#include <video/omapdss.h>
#include <linux/module.h>
#include <linux/types.h>
#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
#include <drm/omap_drm.h>
#include <drm/drm_gem.h>
#include <linux/platform_data/omap_drm.h>
#define DBG(fmt, ...) DRM_DEBUG(fmt"\n", ##__VA_ARGS__)
#define VERB(fmt, ...) if (0) DRM_DEBUG(fmt, ##__VA_ARGS__) /* verbose debug */
#define MODULE_NAME "omapdrm"
/* max # of mapper-id's that can be assigned.. todo, come up with a better
* (but still inexpensive) way to store/access per-buffer mapper private
* data..
*/
#define MAX_MAPPERS 2
/* parameters which describe (unrotated) coordinates of scanout within a fb: */
struct omap_drm_window {
uint32_t rotation;
int32_t crtc_x, crtc_y; /* signed because can be offscreen */
uint32_t crtc_w, crtc_h;
uint32_t src_x, src_y;
uint32_t src_w, src_h;
};
/* Once GO bit is set, we can't make further updates to shadowed registers
* until the GO bit is cleared. So various parts in the kms code that need
* to update shadowed registers queue up a pair of callbacks, pre_apply
* which is called before setting GO bit, and post_apply that is called
* after GO bit is cleared. The crtc manages the queuing, and everyone
* else goes thru omap_crtc_apply() using these callbacks so that the
* code which has to deal w/ GO bit state is centralized.
*/
struct omap_drm_apply {
struct list_head pending_node, queued_node;
bool queued;
void (*pre_apply)(struct omap_drm_apply *apply);
void (*post_apply)(struct omap_drm_apply *apply);
};
/* For transiently registering for different DSS irqs that various parts
* of the KMS code need during setup/configuration. We these are not
* necessarily the same as what drm_vblank_get/put() are requesting, and
* the hysteresis in drm_vblank_put() is not necessarily desirable for
* internal housekeeping related irq usage.
*/
struct omap_drm_irq {
struct list_head node;
uint32_t irqmask;
bool registered;
void (*irq)(struct omap_drm_irq *irq, uint32_t irqstatus);
};
/* For KMS code that needs to wait for a certain # of IRQs:
*/
struct omap_irq_wait;
struct omap_irq_wait * omap_irq_wait_init(struct drm_device *dev,
uint32_t irqmask, int count);
int omap_irq_wait(struct drm_device *dev, struct omap_irq_wait *wait,
unsigned long timeout);
struct omap_drm_private {
uint32_t omaprev;
unsigned int num_crtcs;
struct drm_crtc *crtcs[8];
unsigned int num_planes;
struct drm_plane *planes[8];
unsigned int num_encoders;
struct drm_encoder *encoders[8];
unsigned int num_connectors;
struct drm_connector *connectors[8];
struct drm_fb_helper *fbdev;
struct workqueue_struct *wq;
/* lock for obj_list below */
spinlock_t list_lock;
/* list of GEM objects: */
struct list_head obj_list;
bool has_dmm;
/* properties: */
struct drm_property *rotation_prop;
struct drm_property *zorder_prop;
/* irq handling: */
struct list_head irq_list; /* list of omap_drm_irq */
uint32_t vblank_mask; /* irq bits set for userspace vblank */
struct omap_drm_irq error_handler;
};
#ifdef CONFIG_DEBUG_FS
int omap_debugfs_init(struct drm_minor *minor);
void omap_debugfs_cleanup(struct drm_minor *minor);
void omap_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m);
void omap_gem_describe(struct drm_gem_object *obj, struct seq_file *m);
void omap_gem_describe_objects(struct list_head *list, struct seq_file *m);
#endif
#ifdef CONFIG_PM
int omap_gem_resume(struct device *dev);
#endif
int omap_irq_enable_vblank(struct drm_device *dev, int crtc_id);
void omap_irq_disable_vblank(struct drm_device *dev, int crtc_id);
irqreturn_t omap_irq_handler(int irq, void *arg);
void omap_irq_preinstall(struct drm_device *dev);
int omap_irq_postinstall(struct drm_device *dev);
void omap_irq_uninstall(struct drm_device *dev);
void __omap_irq_register(struct drm_device *dev, struct omap_drm_irq *irq);
void __omap_irq_unregister(struct drm_device *dev, struct omap_drm_irq *irq);
void omap_irq_register(struct drm_device *dev, struct omap_drm_irq *irq);
void omap_irq_unregister(struct drm_device *dev, struct omap_drm_irq *irq);
int omap_drm_irq_uninstall(struct drm_device *dev);
int omap_drm_irq_install(struct drm_device *dev);
struct drm_fb_helper *omap_fbdev_init(struct drm_device *dev);
void omap_fbdev_free(struct drm_device *dev);
const struct omap_video_timings *omap_crtc_timings(struct drm_crtc *crtc);
enum omap_channel omap_crtc_channel(struct drm_crtc *crtc);
int omap_crtc_apply(struct drm_crtc *crtc,
struct omap_drm_apply *apply);
void omap_crtc_pre_init(void);
void omap_crtc_pre_uninit(void);
struct drm_crtc *omap_crtc_init(struct drm_device *dev,
struct drm_plane *plane, enum omap_channel channel, int id);
void omap_crtc_flush(struct drm_crtc *crtc);
struct drm_plane *omap_plane_init(struct drm_device *dev,
int id, enum drm_plane_type type);
int omap_plane_set_enable(struct drm_plane *plane, bool enable);
int omap_plane_mode_set(struct drm_plane *plane,
struct drm_crtc *crtc, struct drm_framebuffer *fb,
int crtc_x, int crtc_y,
unsigned int crtc_w, unsigned int crtc_h,
unsigned int src_x, unsigned int src_y,
unsigned int src_w, unsigned int src_h,
void (*fxn)(void *), void *arg);
void omap_plane_install_properties(struct drm_plane *plane,
struct drm_mode_object *obj);
int omap_plane_set_property(struct drm_plane *plane,
struct drm_property *property, uint64_t val);
struct drm_encoder *omap_encoder_init(struct drm_device *dev,
struct omap_dss_device *dssdev);
int omap_encoder_set_enabled(struct drm_encoder *encoder, bool enabled);
int omap_encoder_update(struct drm_encoder *encoder,
struct omap_overlay_manager *mgr,
struct omap_video_timings *timings);
struct drm_connector *omap_connector_init(struct drm_device *dev,
int connector_type, struct omap_dss_device *dssdev,
struct drm_encoder *encoder);
struct drm_encoder *omap_connector_attached_encoder(
struct drm_connector *connector);
bool omap_connector_get_hdmi_mode(struct drm_connector *connector);
void copy_timings_omap_to_drm(struct drm_display_mode *mode,
struct omap_video_timings *timings);
void copy_timings_drm_to_omap(struct omap_video_timings *timings,
struct drm_display_mode *mode);
uint32_t omap_framebuffer_get_formats(uint32_t *pixel_formats,
uint32_t max_formats, enum omap_color_mode supported_modes);
struct drm_framebuffer *omap_framebuffer_create(struct drm_device *dev,
struct drm_file *file, struct drm_mode_fb_cmd2 *mode_cmd);
struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev,
struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos);
struct drm_gem_object *omap_framebuffer_bo(struct drm_framebuffer *fb, int p);
int omap_framebuffer_pin(struct drm_framebuffer *fb);
int omap_framebuffer_unpin(struct drm_framebuffer *fb);
void omap_framebuffer_update_scanout(struct drm_framebuffer *fb,
struct omap_drm_window *win, struct omap_overlay_info *info);
struct drm_connector *omap_framebuffer_get_next_connector(
struct drm_framebuffer *fb, struct drm_connector *from);
void omap_gem_init(struct drm_device *dev);
void omap_gem_deinit(struct drm_device *dev);
struct drm_gem_object *omap_gem_new(struct drm_device *dev,
union omap_gem_size gsize, uint32_t flags);
int omap_gem_new_handle(struct drm_device *dev, struct drm_file *file,
union omap_gem_size gsize, uint32_t flags, uint32_t *handle);
void omap_gem_free_object(struct drm_gem_object *obj);
void *omap_gem_vaddr(struct drm_gem_object *obj);
int omap_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev,
uint32_t handle, uint64_t *offset);
int omap_gem_dumb_create(struct drm_file *file, struct drm_device *dev,
struct drm_mode_create_dumb *args);
int omap_gem_mmap(struct file *filp, struct vm_area_struct *vma);
int omap_gem_mmap_obj(struct drm_gem_object *obj,
struct vm_area_struct *vma);
int omap_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf);
int omap_gem_op_start(struct drm_gem_object *obj, enum omap_gem_op op);
int omap_gem_op_finish(struct drm_gem_object *obj, enum omap_gem_op op);
int omap_gem_op_sync(struct drm_gem_object *obj, enum omap_gem_op op);
int omap_gem_op_async(struct drm_gem_object *obj, enum omap_gem_op op,
void (*fxn)(void *arg), void *arg);
int omap_gem_roll(struct drm_gem_object *obj, uint32_t roll);
void omap_gem_cpu_sync(struct drm_gem_object *obj, int pgoff);
void omap_gem_dma_sync(struct drm_gem_object *obj,
enum dma_data_direction dir);
int omap_gem_get_paddr(struct drm_gem_object *obj,
dma_addr_t *paddr, bool remap);
int omap_gem_put_paddr(struct drm_gem_object *obj);
int omap_gem_get_pages(struct drm_gem_object *obj, struct page ***pages,
bool remap);
int omap_gem_put_pages(struct drm_gem_object *obj);
uint32_t omap_gem_flags(struct drm_gem_object *obj);
int omap_gem_rotated_paddr(struct drm_gem_object *obj, uint32_t orient,
int x, int y, dma_addr_t *paddr);
uint64_t omap_gem_mmap_offset(struct drm_gem_object *obj);
size_t omap_gem_mmap_size(struct drm_gem_object *obj);
int omap_gem_tiled_size(struct drm_gem_object *obj, uint16_t *w, uint16_t *h);
int omap_gem_tiled_stride(struct drm_gem_object *obj, uint32_t orient);
struct dma_buf *omap_gem_prime_export(struct drm_device *dev,
struct drm_gem_object *obj, int flags);
struct drm_gem_object *omap_gem_prime_import(struct drm_device *dev,
struct dma_buf *buffer);
static inline int align_pitch(int pitch, int width, int bpp)
{
int bytespp = (bpp + 7) / 8;
/* in case someone tries to feed us a completely bogus stride: */
pitch = max(pitch, width * bytespp);
/* PVR needs alignment to 8 pixels.. right now that is the most
* restrictive stride requirement..
*/
return ALIGN(pitch, 8 * bytespp);
}
/* map crtc to vblank mask */
uint32_t pipe2vbl(struct drm_crtc *crtc);
struct omap_dss_device *omap_encoder_get_dssdev(struct drm_encoder *encoder);
/* should these be made into common util helpers?
*/
static inline int objects_lookup(struct drm_device *dev,
struct drm_file *filp, uint32_t pixel_format,
struct drm_gem_object **bos, uint32_t *handles)
{
int i, n = drm_format_num_planes(pixel_format);
for (i = 0; i < n; i++) {
bos[i] = drm_gem_object_lookup(dev, filp, handles[i]);
if (!bos[i])
goto fail;
}
return 0;
fail:
while (--i > 0)
drm_gem_object_unreference_unlocked(bos[i]);
return -ENOENT;
}
#endif /* __OMAP_DRV_H__ */
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