path: root/libdrm/radeon/radeon_cs.h

/* 
 * Copyright © 2008 Nicolai Haehnle
 * Copyright © 2008 Jérôme Glisse
 * All Rights Reserved.
 * 
 * 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, sub license, 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 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 NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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.
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 */
/*
 * Authors:
 *      Aapo Tahkola <aet@rasterburn.org>
 *      Nicolai Haehnle <prefect_@gmx.net>
 *      Jérôme Glisse <glisse@freedesktop.org>
 */
#ifndef RADEON_CS_H
#define RADEON_CS_H

#include <stdint.h>
#include <errno.h>
#include <string.h>
#include "drm.h"
#include "radeon_drm.h"
#include "radeon_bo.h"

struct radeon_cs_reloc {
    struct radeon_bo    *bo;
    uint32_t            read_domain;
    uint32_t            write_domain;
    uint32_t            flags;
};


#define RADEON_CS_SPACE_OK 0
#define RADEON_CS_SPACE_OP_TO_BIG 1
#define RADEON_CS_SPACE_FLUSH 2

struct radeon_cs_space_check {
    struct radeon_bo *bo;
    uint32_t read_domains;
    uint32_t write_domain;
    uint32_t new_accounted;
};

#define MAX_SPACE_BOS (32)

struct radeon_cs_manager;

struct radeon_cs_section {
    unsigned                    ndw;
    unsigned                    cdw;
    const char                  *file;
    const char                  *func;
    int                         line;
};

struct radeon_cs {
    struct radeon_cs_manager    *csm;
    void                        *relocs;
    uint32_t                    *packets;
    unsigned                    crelocs;
    unsigned                    relocs_total_size;
    unsigned                    cdw;
    unsigned                    ndw;
    int 			pad;
    struct radeon_cs_section	pad_section;
    struct radeon_cs_space_check bos[MAX_SPACE_BOS];
    int                         bo_count;
    void                        (*space_flush_fn)(void *);
    void                        *space_flush_data;
};

/* cs functions */
struct radeon_cs_funcs {
    struct radeon_cs *(*cs_create)(struct radeon_cs_manager *csm,
                                   uint32_t ndw);
    int (*cs_write_reloc)(struct radeon_cs *cs,
                          struct radeon_cs_section *section,
                          struct radeon_bo *bo,
                          uint32_t read_domain,
                          uint32_t write_domain,
                          uint32_t flags);
    int (*cs_emit)(struct radeon_cs *cs);
    int (*cs_destroy)(struct radeon_cs *cs);
    int (*cs_erase)(struct radeon_cs *cs);
    int (*cs_need_flush)(struct radeon_cs *cs);
    void (*cs_print)(struct radeon_cs *cs, FILE *file);
};

struct radeon_cs_manager {
    struct radeon_cs_funcs  *funcs;
    int                     fd;
    int32_t vram_limit, gart_limit;
    int32_t vram_write_used, gart_write_used;
    int32_t read_used;
};

static inline struct radeon_cs *radeon_cs_create(struct radeon_cs_manager *csm,
                                                 uint32_t ndw)
{
    return csm->funcs->cs_create(csm, ndw);
}

static inline int radeon_cs_write_reloc(struct radeon_cs *cs,
                                        struct radeon_cs_section *section,
                                        struct radeon_bo *bo,
                                        uint32_t read_domain,
                                        uint32_t write_domain,
                                        uint32_t flags)
{
    return cs->csm->funcs->cs_write_reloc(cs,
                                          section,
                                          bo,
                                          read_domain,
                                          write_domain,
                                          flags);
}

static inline uint32_t  __radeon_cs_alloc_section(struct radeon_cs *cs,
	uint32_t ndw)
{
    /* Atomic operation for threading */
    uint32_t begin = __sync_fetch_and_add(&cs->cdw, ndw);
    /* Handle cs overflow */
    if (begin + ndw > cs->ndw) {
	return (uint32_t)-ENOMEM;
    }
    return begin;
}


#define RADEON_CS_BATCH_LOCAL(name) struct radeon_cs_section name = {0}

static inline int radeon_cs_begin(struct radeon_cs *cs,
                                  struct radeon_cs_section *section,
                                  uint32_t ndw,
                                  const char *file,
                                  const char *func,
                                  int line)
{
    uint32_t begin;
    if (section->ndw) {
        fprintf(stderr, "CS already in a section(%s,%s,%d)\n",
                section->file, section->func, section->line);
        fprintf(stderr, "CS can't start section(%s,%s,%d)\n",
                file, func, line);
        return -EPIPE;
    }

    section->file = file;
    section->func = func;
    section->line = line;
    begin = __radeon_cs_alloc_section(cs, ndw);
    if (begin > cs->ndw) {
	return (int)begin;
    }
    section->ndw = begin + ndw;
    section->cdw = begin;
    return 0;
}

static inline int radeon_cs_end(struct radeon_cs *cs,
                                struct radeon_cs_section *section,
                                const char *file,
                                const char *func,
                                int line)
{
    int rv = 0;
    if (!section->ndw) {
        fprintf(stderr, "CS no section to end at (%s,%s,%d)\n",
                file, func, line);
        rv = -EPIPE;
	goto out;
    }

    if (section->cdw != section->ndw) {
        fprintf(stderr, "CS section size missmatch start at (%s,%s,%d) %d vs %d\n",
                section->file, section->func, section->line, section->ndw, section->cdw);
        fprintf(stderr, "CS section end at (%s,%s,%d)\n",
                file, func, line);

	rv = -EPIPE;
	goto out;
    }
out:
    section->ndw = 0;
    return rv;
}

static inline int radeon_cs_emit(struct radeon_cs *cs)
{
    return cs->csm->funcs->cs_emit(cs);
}

static inline int radeon_cs_destroy(struct radeon_cs *cs)
{
    return cs->csm->funcs->cs_destroy(cs);
}

static inline int radeon_cs_erase(struct radeon_cs *cs)
{
    return cs->csm->funcs->cs_erase(cs);
}

static inline int radeon_cs_need_flush(struct radeon_cs *cs)
{
    return cs->csm->funcs->cs_need_flush(cs);
}

static inline void radeon_cs_print(struct radeon_cs *cs, FILE *file)
{
    cs->csm->funcs->cs_print(cs, file);
}

static inline void radeon_cs_set_limit(struct radeon_cs *cs, uint32_t domain, uint32_t limit)
{
    
    if (domain == RADEON_GEM_DOMAIN_VRAM)
	cs->csm->vram_limit = limit;
    else
	cs->csm->gart_limit = limit;
}

static inline void radeon_cs_write_dword(struct radeon_cs *cs,
        struct radeon_cs_section *section,
        uint32_t dword)
{
    cs->packets[section->cdw] = dword;
    section->cdw++;
}

static inline void radeon_cs_write_qword(struct radeon_cs *cs,
        struct radeon_cs_section *section,
        uint64_t qword)
{
    memcpy(cs->packets + section->cdw, &qword, sizeof(uint64_t));
    section->cdw += 2;
}

static inline void radeon_cs_write_table(struct radeon_cs *cs,
        struct radeon_cs_section *section,
        void *data, uint32_t size)
{
    memcpy(cs->packets + section->cdw, data, size * 4);
    section->cdw += size;
}

static inline void radeon_cs_space_set_flush(struct radeon_cs *cs, void (*fn)(void *), void *data)
{
    cs->space_flush_fn = fn;
    cs->space_flush_data = data;
}


/*
 * add a persistent BO to the list
 * a persistent BO is one that will be referenced across flushes,
 * i.e. colorbuffer, textures etc.
 * They get reset when a new "operation" happens, where an operation
 * is a state emission with a color/textures etc followed by a bunch of vertices.
 */
void radeon_cs_space_add_persistent_bo(struct radeon_cs *cs,
				       struct radeon_bo *bo,
				       uint32_t read_domains,
				       uint32_t write_domain);

/* reset the persistent BO list */
void radeon_cs_space_reset_bos(struct radeon_cs *cs);

/* do a space check with the current persistent BO list */
int radeon_cs_space_check(struct radeon_cs *cs);

/* do a space check with the current persistent BO list and a temporary BO
 * a temporary BO is like a DMA buffer, which  gets flushed with the
 * command buffer */
int radeon_cs_space_check_with_bo(struct radeon_cs *cs,
				  struct radeon_bo *bo,
				  uint32_t read_domains,
				  uint32_t write_domain);

#endif