cregit-Linux how code gets into the kernel

Release 4.7 drivers/gpu/drm/qxl/qxl_drv.h

/*
 * Copyright 2013 Red Hat Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * Authors: Dave Airlie
 *          Alon Levy
 */


#ifndef QXL_DRV_H

#define QXL_DRV_H

/*
 * Definitions taken from spice-protocol, plus kernel driver specific bits.
 */

#include <linux/fence.h>
#include <linux/workqueue.h>
#include <linux/firmware.h>
#include <linux/platform_device.h>

#include "drmP.h"
#include "drm_crtc.h"
#include <ttm/ttm_bo_api.h>
#include <ttm/ttm_bo_driver.h>
#include <ttm/ttm_placement.h>
#include <ttm/ttm_module.h>

#include <drm/drm_gem.h>

/* just for ttm_validate_buffer */
#include <ttm/ttm_execbuf_util.h>

#include <drm/qxl_drm.h>
#include "qxl_dev.h"


#define DRIVER_AUTHOR		"Dave Airlie"


#define DRIVER_NAME		"qxl"

#define DRIVER_DESC		"RH QXL"

#define DRIVER_DATE		"20120117"


#define DRIVER_MAJOR 0

#define DRIVER_MINOR 1

#define DRIVER_PATCHLEVEL 0


#define QXL_DEBUGFS_MAX_COMPONENTS		32

extern int qxl_log_level;
extern int qxl_num_crtc;

enum {
	
QXL_INFO_LEVEL = 1,
	
QXL_DEBUG_LEVEL = 2,
};


#define QXL_INFO(qdev, fmt, ...) do { \
                if (qxl_log_level >= QXL_INFO_LEVEL) {  \
                        qxl_io_log(qdev, fmt, __VA_ARGS__); \
                }       \
        } while (0)

#define QXL_DEBUG(qdev, fmt, ...) do { \
                if (qxl_log_level >= QXL_DEBUG_LEVEL) { \
                        qxl_io_log(qdev, fmt, __VA_ARGS__); \
                }       \
        } while (0)

#define QXL_INFO_ONCE(qdev, fmt, ...) do { \
                static int done;                \
                if (!done) {                    \
                        done = 1;                       \
                        QXL_INFO(qdev, fmt, __VA_ARGS__);       \
                }                                               \
        } while (0)


#define DRM_FILE_OFFSET 0x100000000ULL

#define DRM_FILE_PAGE_OFFSET (DRM_FILE_OFFSET >> PAGE_SHIFT)


#define QXL_INTERRUPT_MASK (\
        QXL_INTERRUPT_DISPLAY |\
        QXL_INTERRUPT_CURSOR |\
        QXL_INTERRUPT_IO_CMD |\
        QXL_INTERRUPT_CLIENT_MONITORS_CONFIG)


struct qxl_bo {
	/* Protected by gem.mutex */
	
struct list_head		list;
	/* Protected by tbo.reserved */
	
struct ttm_place		placements[3];
	
struct ttm_placement		placement;
	
struct ttm_buffer_object	tbo;
	
struct ttm_bo_kmap_obj		kmap;
	
unsigned			pin_count;
	
void				*kptr;
	
int                             type;

	/* Constant after initialization */
	
struct drm_gem_object		gem_base;
	
bool is_primary; /* is this now a primary surface */
	
bool hw_surf_alloc;
	
struct qxl_surface surf;
	
uint32_t surface_id;
	
struct qxl_release *surf_create;
};

#define gem_to_qxl_bo(gobj) container_of((gobj), struct qxl_bo, gem_base)

#define to_qxl_bo(tobj) container_of((tobj), struct qxl_bo, tbo)


struct qxl_gem {
	
struct mutex		mutex;
	
struct list_head	objects;
};


struct qxl_bo_list {
	
struct ttm_validate_buffer tv;
};


struct qxl_crtc {
	
struct drm_crtc base;
	
int index;
	
int cur_x;
	
int cur_y;
	
int hot_spot_x;
	
int hot_spot_y;
};


struct qxl_output {
	
int index;
	
struct drm_connector base;
	
struct drm_encoder enc;
};


struct qxl_framebuffer {
	
struct drm_framebuffer base;
	
struct drm_gem_object *obj;
};


#define to_qxl_crtc(x) container_of(x, struct qxl_crtc, base)

#define drm_connector_to_qxl_output(x) container_of(x, struct qxl_output, base)

#define drm_encoder_to_qxl_output(x) container_of(x, struct qxl_output, enc)

#define to_qxl_framebuffer(x) container_of(x, struct qxl_framebuffer, base)


struct qxl_mman {
	
struct ttm_bo_global_ref        bo_global_ref;
	
struct drm_global_reference	mem_global_ref;
	
bool				mem_global_referenced;
	
struct ttm_bo_device		bdev;
};


struct qxl_mode_info {
	
int num_modes;
	
struct qxl_mode *modes;
	
bool mode_config_initialized;

	/* pointer to fbdev info structure */
	
struct qxl_fbdev *qfbdev;
};



struct qxl_memslot {
	
uint8_t		generation;
	
uint64_t	start_phys_addr;
	
uint64_t	end_phys_addr;
	
uint64_t	high_bits;
};

enum {
	
QXL_RELEASE_DRAWABLE,
	
QXL_RELEASE_SURFACE_CMD,
	
QXL_RELEASE_CURSOR_CMD,
};

/* drm_ prefix to differentiate from qxl_release_info in
 * spice-protocol/qxl_dev.h */

#define QXL_MAX_RES 96

struct qxl_release {
	
struct fence base;

	
int id;
	
int type;
	
uint32_t release_offset;
	
uint32_t surface_release_id;
	
struct ww_acquire_ctx ticket;
	
struct list_head bos;
};


struct qxl_drm_chunk {
	
struct list_head head;
	
struct qxl_bo *bo;
};


struct qxl_drm_image {
	
struct qxl_bo *bo;
	
struct list_head chunk_list;
};


struct qxl_fb_image {
	
struct qxl_device *qdev;
	
uint32_t pseudo_palette[16];
	
struct fb_image fb_image;
	
uint32_t visual;
};


struct qxl_draw_fill {
	
struct qxl_device *qdev;
	
struct qxl_rect rect;
	
uint32_t color;
	
uint16_t rop;
};

/*
 * Debugfs
 */

struct qxl_debugfs {
	
struct drm_info_list	*files;
	
unsigned		num_files;
};

int qxl_debugfs_add_files(struct qxl_device *rdev,
			     struct drm_info_list *files,
			     unsigned nfiles);
int qxl_debugfs_fence_init(struct qxl_device *rdev);
void qxl_debugfs_remove_files(struct qxl_device *qdev);

struct qxl_device;


struct qxl_device {
	
struct device			*dev;
	
struct drm_device		*ddev;
	
struct pci_dev			*pdev;
	
unsigned long flags;

	

resource_size_t vram_base, vram_size;
	

resource_size_t surfaceram_base, surfaceram_size;
	

resource_size_t rom_base, rom_size;
	
struct qxl_rom *rom;

	
struct qxl_mode *modes;
	
struct qxl_bo *monitors_config_bo;
	
struct qxl_monitors_config *monitors_config;

	/* last received client_monitors_config */
	
struct qxl_monitors_config *client_monitors_config;

	
int io_base;
	
void *ram;
	
struct qxl_mman		mman;
	
struct qxl_gem		gem;
	
struct qxl_mode_info mode_info;

	
struct fb_info			*fbdev_info;
	
struct qxl_framebuffer	*fbdev_qfb;
	
void *ram_physical;

	
struct qxl_ring *release_ring;
	
struct qxl_ring *command_ring;
	
struct qxl_ring *cursor_ring;

	
struct qxl_ram_header *ram_header;

	
bool primary_created;

	
struct qxl_memslot	*mem_slots;
	
uint8_t		n_mem_slots;

	
uint8_t		main_mem_slot;
	
uint8_t		surfaces_mem_slot;
	
uint8_t		slot_id_bits;
	
uint8_t		slot_gen_bits;
	
uint64_t	va_slot_mask;

	
spinlock_t	release_lock;
	
struct idr	release_idr;
	
uint32_t	release_seqno;
	
spinlock_t release_idr_lock;
	
struct mutex	async_io_mutex;
	
unsigned int last_sent_io_cmd;

	/* interrupt handling */
	
atomic_t irq_received;
	
atomic_t irq_received_display;
	
atomic_t irq_received_cursor;
	
atomic_t irq_received_io_cmd;
	
unsigned irq_received_error;
	
wait_queue_head_t display_event;
	
wait_queue_head_t cursor_event;
	
wait_queue_head_t io_cmd_event;
	
struct work_struct client_monitors_config_work;

	/* debugfs */
	
struct qxl_debugfs	debugfs[QXL_DEBUGFS_MAX_COMPONENTS];
	
unsigned		debugfs_count;

	
struct mutex		update_area_mutex;

	
struct idr	surf_id_idr;
	
spinlock_t surf_id_idr_lock;
	
int last_alloced_surf_id;

	
struct mutex surf_evict_mutex;
	
struct io_mapping *vram_mapping;
	
struct io_mapping *surface_mapping;

	/* */
	
struct mutex release_mutex;
	
struct qxl_bo *current_release_bo[3];
	
int current_release_bo_offset[3];

	
struct workqueue_struct *gc_queue;
	
struct work_struct gc_work;

	
struct drm_property *hotplug_mode_update_property;
	
int monitors_config_width;
	
int monitors_config_height;
};

/* forward declaration for QXL_INFO_IO */
__printf(2,3) void qxl_io_log(struct qxl_device *qdev, const char *fmt, ...);

extern const struct drm_ioctl_desc qxl_ioctls[];
extern int qxl_max_ioctl;

int qxl_driver_load(struct drm_device *dev, unsigned long flags);
int qxl_driver_unload(struct drm_device *dev);

int qxl_modeset_init(struct qxl_device *qdev);
void qxl_modeset_fini(struct qxl_device *qdev);

int qxl_bo_init(struct qxl_device *qdev);
void qxl_bo_fini(struct qxl_device *qdev);

void qxl_reinit_memslots(struct qxl_device *qdev);
int qxl_surf_evict(struct qxl_device *qdev);
int qxl_vram_evict(struct qxl_device *qdev);

struct qxl_ring *qxl_ring_create(struct qxl_ring_header *header,
				 int element_size,
				 int n_elements,
				 int prod_notify,
				 bool set_prod_notify,
				 wait_queue_head_t *push_event);
void qxl_ring_free(struct qxl_ring *ring);
void qxl_ring_init_hdr(struct qxl_ring *ring);
int qxl_check_idle(struct qxl_ring *ring);


static inline void * qxl_fb_virtual_address(struct qxl_device *qdev, unsigned long physical) { QXL_INFO(qdev, "not implemented (%lu)\n", physical); return 0; }

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static inline uint64_t qxl_bo_physical_address(struct qxl_device *qdev, struct qxl_bo *bo, unsigned long offset) { int slot_id = bo->type == QXL_GEM_DOMAIN_VRAM ? qdev->main_mem_slot : qdev->surfaces_mem_slot; struct qxl_memslot *slot = &(qdev->mem_slots[slot_id]); /* TODO - need to hold one of the locks to read tbo.offset */ return slot->high_bits | (bo->tbo.offset + offset); }

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/* qxl_fb.c */ #define QXLFB_CONN_LIMIT 1 int qxl_fbdev_init(struct qxl_device *qdev); void qxl_fbdev_fini(struct qxl_device *qdev); int qxl_get_handle_for_primary_fb(struct qxl_device *qdev, struct drm_file *file_priv, uint32_t *handle); void qxl_fbdev_set_suspend(struct qxl_device *qdev, int state); /* qxl_display.c */ void qxl_user_framebuffer_destroy(struct drm_framebuffer *fb); int qxl_framebuffer_init(struct drm_device *dev, struct qxl_framebuffer *rfb, const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object *obj, const struct drm_framebuffer_funcs *funcs); void qxl_display_read_client_monitors_config(struct qxl_device *qdev); void qxl_send_monitors_config(struct qxl_device *qdev); int qxl_create_monitors_object(struct qxl_device *qdev); int qxl_destroy_monitors_object(struct qxl_device *qdev); /* used by qxl_debugfs only */ void qxl_crtc_set_from_monitors_config(struct qxl_device *qdev); void qxl_alloc_client_monitors_config(struct qxl_device *qdev, unsigned count); /* qxl_gem.c */ int qxl_gem_init(struct qxl_device *qdev); void qxl_gem_fini(struct qxl_device *qdev); int qxl_gem_object_create(struct qxl_device *qdev, int size, int alignment, int initial_domain, bool discardable, bool kernel, struct qxl_surface *surf, struct drm_gem_object **obj); int qxl_gem_object_create_with_handle(struct qxl_device *qdev, struct drm_file *file_priv, u32 domain, size_t size, struct qxl_surface *surf, struct qxl_bo **qobj, uint32_t *handle); void qxl_gem_object_free(struct drm_gem_object *gobj); int qxl_gem_object_open(struct drm_gem_object *obj, struct drm_file *file_priv); void qxl_gem_object_close(struct drm_gem_object *obj, struct drm_file *file_priv); void qxl_bo_force_delete(struct qxl_device *qdev); int qxl_bo_kmap(struct qxl_bo *bo, void **ptr); /* qxl_dumb.c */ int qxl_mode_dumb_create(struct drm_file *file_priv, struct drm_device *dev, struct drm_mode_create_dumb *args); int qxl_mode_dumb_mmap(struct drm_file *filp, struct drm_device *dev, uint32_t handle, uint64_t *offset_p); /* qxl ttm */ int qxl_ttm_init(struct qxl_device *qdev); void qxl_ttm_fini(struct qxl_device *qdev); int qxl_mmap(struct file *filp, struct vm_area_struct *vma); /* qxl image */ int qxl_image_init(struct qxl_device *qdev, struct qxl_release *release, struct qxl_drm_image *dimage, const uint8_t *data, int x, int y, int width, int height, int depth, int stride); int qxl_image_alloc_objects(struct qxl_device *qdev, struct qxl_release *release, struct qxl_drm_image **image_ptr, int height, int stride); void qxl_image_free_objects(struct qxl_device *qdev, struct qxl_drm_image *dimage); void qxl_update_screen(struct qxl_device *qxl); /* qxl io operations (qxl_cmd.c) */ void qxl_io_create_primary(struct qxl_device *qdev, unsigned offset, struct qxl_bo *bo); void qxl_io_destroy_primary(struct qxl_device *qdev); void qxl_io_memslot_add(struct qxl_device *qdev, uint8_t id); void qxl_io_notify_oom(struct qxl_device *qdev); int qxl_io_update_area(struct qxl_device *qdev, struct qxl_bo *surf, const struct qxl_rect *area); void qxl_io_reset(struct qxl_device *qdev); void qxl_io_monitors_config(struct qxl_device *qdev); int qxl_ring_push(struct qxl_ring *ring, const void *new_elt, bool interruptible); void qxl_io_flush_release(struct qxl_device *qdev); void qxl_io_flush_surfaces(struct qxl_device *qdev); union qxl_release_info *qxl_release_map(struct qxl_device *qdev, struct qxl_release *release); void qxl_release_unmap(struct qxl_device *qdev, struct qxl_release *release, union qxl_release_info *info); int qxl_release_list_add(struct qxl_release *release, struct qxl_bo *bo); int qxl_release_reserve_list(struct qxl_release *release, bool no_intr); void qxl_release_backoff_reserve_list(struct qxl_release *release); void qxl_release_fence_buffer_objects(struct qxl_release *release); int qxl_alloc_surface_release_reserved(struct qxl_device *qdev, enum qxl_surface_cmd_type surface_cmd_type, struct qxl_release *create_rel, struct qxl_release **release); int qxl_alloc_release_reserved(struct qxl_device *qdev, unsigned long size, int type, struct qxl_release **release, struct qxl_bo **rbo); int qxl_push_command_ring_release(struct qxl_device *qdev, struct qxl_release *release, uint32_t type, bool interruptible); int qxl_push_cursor_ring_release(struct qxl_device *qdev, struct qxl_release *release, uint32_t type, bool interruptible); int qxl_alloc_bo_reserved(struct qxl_device *qdev, struct qxl_release *release, unsigned long size, struct qxl_bo **_bo); /* qxl drawing commands */ void qxl_draw_opaque_fb(const struct qxl_fb_image *qxl_fb_image, int stride /* filled in if 0 */); void qxl_draw_dirty_fb(struct qxl_device *qdev, struct qxl_framebuffer *qxl_fb, struct qxl_bo *bo, unsigned flags, unsigned color, struct drm_clip_rect *clips, unsigned num_clips, int inc); void qxl_draw_fill(struct qxl_draw_fill *qxl_draw_fill_rec); void qxl_draw_copyarea(struct qxl_device *qdev, u32 width, u32 height, u32 sx, u32 sy, u32 dx, u32 dy); void qxl_release_free(struct qxl_device *qdev, struct qxl_release *release); /* used by qxl_debugfs_release */ struct qxl_release *qxl_release_from_id_locked(struct qxl_device *qdev, uint64_t id); bool qxl_queue_garbage_collect(struct qxl_device *qdev, bool flush); int qxl_garbage_collect(struct qxl_device *qdev); /* debugfs */ int qxl_debugfs_init(struct drm_minor *minor); void qxl_debugfs_takedown(struct drm_minor *minor); /* qxl_prime.c */ int qxl_gem_prime_pin(struct drm_gem_object *obj); void qxl_gem_prime_unpin(struct drm_gem_object *obj); struct sg_table *qxl_gem_prime_get_sg_table(struct drm_gem_object *obj); struct drm_gem_object *qxl_gem_prime_import_sg_table( struct drm_device *dev, struct dma_buf_attachment *attach, struct sg_table *sgt); void *qxl_gem_prime_vmap(struct drm_gem_object *obj); void qxl_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr); int qxl_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma); /* qxl_irq.c */ int qxl_irq_init(struct qxl_device *qdev); irqreturn_t qxl_irq_handler(int irq, void *arg); /* qxl_fb.c */ bool qxl_fbdev_qobj_is_fb(struct qxl_device *qdev, struct qxl_bo *qobj); int qxl_debugfs_add_files(struct qxl_device *qdev, struct drm_info_list *files, unsigned nfiles); int qxl_surface_id_alloc(struct qxl_device *qdev, struct qxl_bo *surf); void qxl_surface_id_dealloc(struct qxl_device *qdev, uint32_t surface_id); int qxl_hw_surface_alloc(struct qxl_device *qdev, struct qxl_bo *surf, struct ttm_mem_reg *mem); int qxl_hw_surface_dealloc(struct qxl_device *qdev, struct qxl_bo *surf); int qxl_bo_check_id(struct qxl_device *qdev, struct qxl_bo *bo); struct qxl_drv_surface * qxl_surface_lookup(struct drm_device *dev, int surface_id); void qxl_surface_evict(struct qxl_device *qdev, struct qxl_bo *surf, bool freeing); int qxl_update_surface(struct qxl_device *qdev, struct qxl_bo *surf); #endif

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