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libdrm  2.4.37
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radeon_cs_gem.c File Reference
#include <assert.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <pthread.h>
#include <sys/mman.h>
#include <sys/ioctl.h>
#include "radeon_cs.h"
#include "radeon_cs_int.h"
#include "radeon_bo_int.h"
#include "radeon_cs_gem.h"
#include "radeon_bo_gem.h"
#include "drm.h"
#include "xf86drm.h"
#include "xf86atomic.h"
#include "radeon_drm.h"
#include "bof.h"

Go to the source code of this file.

Classes

struct  radeon_cs_manager_gem
struct  cs_reloc_gem
struct  cs_gem

Defines

#define CS_BOF_DUMP   0
#define RELOC_SIZE   (sizeof(struct cs_reloc_gem) / sizeof(uint32_t))

Functions

static uint32_t get_first_zero (const uint32_t n)
 result is undefined if called with ~0
static uint32_t generate_id (void)
 Returns a free id for cs.
static void free_id (uint32_t id)
 Free the id for later reuse.
static struct radeon_cs_intcs_gem_create (struct radeon_cs_manager *csm, uint32_t ndw)
static int cs_gem_write_reloc (struct radeon_cs_int *cs, struct radeon_bo *bo, uint32_t read_domain, uint32_t write_domain, uint32_t flags)
static int cs_gem_begin (struct radeon_cs_int *cs, uint32_t ndw, const char *file, const char *func, int line)
static int cs_gem_end (struct radeon_cs_int *cs, const char *file, const char *func, int line)
static void cs_gem_dump_bof (struct radeon_cs_int *cs)
static int cs_gem_emit (struct radeon_cs_int *cs)
static int cs_gem_destroy (struct radeon_cs_int *cs)
static int cs_gem_erase (struct radeon_cs_int *cs)
static int cs_gem_need_flush (struct radeon_cs_int *cs)
static void cs_gem_print (struct radeon_cs_int *cs, FILE *file)
static int radeon_get_device_id (int fd, uint32_t *device_id)
struct radeon_cs_managerradeon_cs_manager_gem_ctor (int fd)
void radeon_cs_manager_gem_dtor (struct radeon_cs_manager *csm)

Variables

static pthread_mutex_t id_mutex = PTHREAD_MUTEX_INITIALIZER
static uint32_t cs_id_source = 0
static struct radeon_cs_funcs

Class Documentation

struct radeon_cs_manager_gem

Definition at line 52 of file radeon_cs_gem.c.

Class Members
uint32_t device_id
unsigned nbof
struct cs_reloc_gem

Definition at line 59 of file radeon_cs_gem.c.

Class Members
uint32_t flags
uint32_t handle
uint32_t read_domain
uint32_t write_domain
struct cs_gem

Definition at line 69 of file radeon_cs_gem.c.

Collaboration diagram for cs_gem:
Class Members
unsigned nrelocs
uint32_t * relocs
struct radeon_bo_int ** relocs_bo

Define Documentation

#define CS_BOF_DUMP   0

Definition at line 50 of file radeon_cs_gem.c.

#define RELOC_SIZE   (sizeof(struct cs_reloc_gem) / sizeof(uint32_t))

Definition at line 67 of file radeon_cs_gem.c.


Function Documentation

static int cs_gem_begin ( struct radeon_cs_int cs,
uint32_t  ndw,
const char *  file,
const char *  func,
int  line 
) [static]

Definition at line 273 of file radeon_cs_gem.c.

{

    if (cs->section_ndw) {
        fprintf(stderr, "CS already in a section(%s,%s,%d)\n",
                cs->section_file, cs->section_func, cs->section_line);
        fprintf(stderr, "CS can't start section(%s,%s,%d)\n",
                file, func, line);
        return -EPIPE;
    }
    cs->section_ndw = ndw;
    cs->section_cdw = 0;
    cs->section_file = file;
    cs->section_func = func;
    cs->section_line = line;

    if (cs->cdw + ndw > cs->ndw) {
        uint32_t tmp, *ptr;

        /* round up the required size to a multiple of 1024 */
        tmp = (cs->cdw + ndw + 0x3FF) & (~0x3FF);
        ptr = (uint32_t*)realloc(cs->packets, 4 * tmp);
        if (ptr == NULL) {
            return -ENOMEM;
        }
        cs->packets = ptr;
        cs->ndw = tmp;
    }
    return 0;
}
static struct radeon_cs_int* cs_gem_create ( struct radeon_cs_manager csm,
uint32_t  ndw 
) [static, read]

Definition at line 122 of file radeon_cs_gem.c.

{
    struct cs_gem *csg;

    /* max cmd buffer size is 64Kb */
    if (ndw > (64 * 1024 / 4)) {
        return NULL;
    }
    csg = (struct cs_gem*)calloc(1, sizeof(struct cs_gem));
    if (csg == NULL) {
        return NULL;
    }
    csg->base.csm = csm;
    csg->base.ndw = 64 * 1024 / 4;
    csg->base.packets = (uint32_t*)calloc(1, 64 * 1024);
    if (csg->base.packets == NULL) {
        free(csg);
        return NULL;
    }
    csg->base.relocs_total_size = 0;
    csg->base.crelocs = 0;
    csg->base.id = generate_id();
    csg->nrelocs = 4096 / (4 * 4) ;
    csg->relocs_bo = (struct radeon_bo_int**)calloc(1,
                                                csg->nrelocs*sizeof(void*));
    if (csg->relocs_bo == NULL) {
        free(csg->base.packets);
        free(csg);
        return NULL;
    }
    csg->base.relocs = csg->relocs = (uint32_t*)calloc(1, 4096);
    if (csg->relocs == NULL) {
        free(csg->relocs_bo);
        free(csg->base.packets);
        free(csg);
        return NULL;
    }
    csg->chunks[0].chunk_id = RADEON_CHUNK_ID_IB;
    csg->chunks[0].length_dw = 0;
    csg->chunks[0].chunk_data = (uint64_t)(uintptr_t)csg->base.packets;
    csg->chunks[1].chunk_id = RADEON_CHUNK_ID_RELOCS;
    csg->chunks[1].length_dw = 0;
    csg->chunks[1].chunk_data = (uint64_t)(uintptr_t)csg->relocs;
    return (struct radeon_cs_int*)csg;
}

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static int cs_gem_destroy ( struct radeon_cs_int cs) [static]

Definition at line 453 of file radeon_cs_gem.c.

{
    struct cs_gem *csg = (struct cs_gem*)cs;

    free_id(cs->id);
    free(csg->relocs_bo);
    free(cs->relocs);
    free(cs->packets);
    free(cs);
    return 0;
}

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static void cs_gem_dump_bof ( struct radeon_cs_int cs) [static]

Definition at line 333 of file radeon_cs_gem.c.

{
    struct cs_gem *csg = (struct cs_gem*)cs;
    struct radeon_cs_manager_gem *csm;
    bof_t *bcs, *blob, *array, *bo, *size, *handle, *device_id, *root;
    char tmp[256];
    unsigned i;

    csm = (struct radeon_cs_manager_gem *)cs->csm;
    root = device_id = bcs = blob = array = bo = size = handle = NULL;
    root = bof_object();
    if (root == NULL)
        goto out_err;
    device_id = bof_int32(csm->device_id);
    if (device_id == NULL)
        return;
    if (bof_object_set(root, "device_id", device_id))
        goto out_err;
    bof_decref(device_id);
    device_id = NULL;
    /* dump relocs */
    blob = bof_blob(csg->nrelocs * 16, csg->relocs);
    if (blob == NULL)
        goto out_err;
    if (bof_object_set(root, "reloc", blob))
        goto out_err;
    bof_decref(blob);
    blob = NULL;
    /* dump cs */
    blob = bof_blob(cs->cdw * 4, cs->packets);
    if (blob == NULL)
        goto out_err;
    if (bof_object_set(root, "pm4", blob))
        goto out_err;
    bof_decref(blob);
    blob = NULL;
    /* dump bo */
    array = bof_array();
    if (array == NULL)
        goto out_err;
    for (i = 0; i < csg->base.crelocs; i++) {
        bo = bof_object();
        if (bo == NULL)
            goto out_err;
        size = bof_int32(csg->relocs_bo[i]->size);
        if (size == NULL)
            goto out_err;
        if (bof_object_set(bo, "size", size))
            goto out_err;
        bof_decref(size);
        size = NULL;
        handle = bof_int32(csg->relocs_bo[i]->handle);
        if (handle == NULL)
            goto out_err;
        if (bof_object_set(bo, "handle", handle))
            goto out_err;
        bof_decref(handle);
        handle = NULL;
        radeon_bo_map((struct radeon_bo*)csg->relocs_bo[i], 0);
        blob = bof_blob(csg->relocs_bo[i]->size, csg->relocs_bo[i]->ptr);
        radeon_bo_unmap((struct radeon_bo*)csg->relocs_bo[i]);
        if (blob == NULL)
            goto out_err;
        if (bof_object_set(bo, "data", blob))
            goto out_err;
        bof_decref(blob);
        blob = NULL;
        if (bof_array_append(array, bo))
            goto out_err;
        bof_decref(bo);
        bo = NULL;
    }
    if (bof_object_set(root, "bo", array))
        goto out_err;
    sprintf(tmp, "d-0x%04X-%08d.bof", csm->device_id, csm->nbof++);
    bof_dump_file(root, tmp);
out_err:
    bof_decref(blob);
    bof_decref(array);
    bof_decref(bo);
    bof_decref(size);
    bof_decref(handle);
    bof_decref(device_id);
    bof_decref(root);
}

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static int cs_gem_emit ( struct radeon_cs_int cs) [static]

Definition at line 419 of file radeon_cs_gem.c.

{
    struct cs_gem *csg = (struct cs_gem*)cs;
    uint64_t chunk_array[2];
    unsigned i;
    int r;

#if CS_BOF_DUMP
    cs_gem_dump_bof(cs);
#endif
    csg->chunks[0].length_dw = cs->cdw;

    chunk_array[0] = (uint64_t)(uintptr_t)&csg->chunks[0];
    chunk_array[1] = (uint64_t)(uintptr_t)&csg->chunks[1];

    csg->cs.num_chunks = 2;
    csg->cs.chunks = (uint64_t)(uintptr_t)chunk_array;

    r = drmCommandWriteRead(cs->csm->fd, DRM_RADEON_CS,
                            &csg->cs, sizeof(struct drm_radeon_cs));
    for (i = 0; i < csg->base.crelocs; i++) {
        csg->relocs_bo[i]->space_accounted = 0;
        /* bo might be referenced from another context so have to use atomic opertions */
        atomic_dec((atomic_t *)radeon_gem_get_reloc_in_cs((struct radeon_bo*)csg->relocs_bo[i]), cs->id);
        radeon_bo_unref((struct radeon_bo *)csg->relocs_bo[i]);
        csg->relocs_bo[i] = NULL;
    }

    cs->csm->read_used = 0;
    cs->csm->vram_write_used = 0;
    cs->csm->gart_write_used = 0;
    return r;
}

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static int cs_gem_end ( struct radeon_cs_int cs,
const char *  file,
const char *  func,
int  line 
) [static]

Definition at line 308 of file radeon_cs_gem.c.

{
    if (!cs->section_ndw) {
        fprintf(stderr, "CS no section to end at (%s,%s,%d)\n",
                file, func, line);
        return -EPIPE;
    }
    if (cs->section_ndw != cs->section_cdw) {
        fprintf(stderr, "CS section size missmatch start at (%s,%s,%d) %d vs %d\n",
                cs->section_file, cs->section_func, cs->section_line, cs->section_ndw, cs->section_cdw);
        fprintf(stderr, "CS section end at (%s,%s,%d)\n",
                file, func, line);

        /* We must reset the section even when there is error. */
        cs->section_ndw = 0;
        return -EPIPE;
    }
    cs->section_ndw = 0;
    return 0;
}
static int cs_gem_erase ( struct radeon_cs_int cs) [static]

Definition at line 465 of file radeon_cs_gem.c.

{
    struct cs_gem *csg = (struct cs_gem*)cs;
    unsigned i;

    if (csg->relocs_bo) {
        for (i = 0; i < csg->base.crelocs; i++) {
            if (csg->relocs_bo[i]) {
                /* bo might be referenced from another context so have to use atomic opertions */
                atomic_dec((atomic_t *)radeon_gem_get_reloc_in_cs((struct radeon_bo*)csg->relocs_bo[i]), cs->id);
                radeon_bo_unref((struct radeon_bo *)csg->relocs_bo[i]);
                csg->relocs_bo[i] = NULL;
            }
        }
    }
    cs->relocs_total_size = 0;
    cs->cdw = 0;
    cs->section_ndw = 0;
    cs->crelocs = 0;
    csg->chunks[0].length_dw = 0;
    csg->chunks[1].length_dw = 0;
    return 0;
}

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static int cs_gem_need_flush ( struct radeon_cs_int cs) [static]

Definition at line 489 of file radeon_cs_gem.c.

{
    return 0; //(cs->relocs_total_size > (32*1024*1024));
}
static void cs_gem_print ( struct radeon_cs_int cs,
FILE *  file 
) [static]

Definition at line 494 of file radeon_cs_gem.c.

{
    struct radeon_cs_manager_gem *csm;
    unsigned int i;

    csm = (struct radeon_cs_manager_gem *)cs->csm;
    fprintf(file, "VENDORID:DEVICEID 0x%04X:0x%04X\n", 0x1002, csm->device_id);
    for (i = 0; i < cs->cdw; i++) {
        fprintf(file, "0x%08X\n", cs->packets[i]);
    }
}
static int cs_gem_write_reloc ( struct radeon_cs_int cs,
struct radeon_bo bo,
uint32_t  read_domain,
uint32_t  write_domain,
uint32_t  flags 
) [static]

Definition at line 169 of file radeon_cs_gem.c.

{
    struct radeon_bo_int *boi = (struct radeon_bo_int *)bo;
    struct cs_gem *csg = (struct cs_gem*)cs;
    struct cs_reloc_gem *reloc;
    uint32_t idx;
    unsigned i;

    assert(boi->space_accounted);

    /* check domains */
    if ((read_domain && write_domain) || (!read_domain && !write_domain)) {
        /* in one CS a bo can only be in read or write domain but not
         * in read & write domain at the same sime
         */
        return -EINVAL;
    }
    if (read_domain == RADEON_GEM_DOMAIN_CPU) {
        return -EINVAL;
    }
    if (write_domain == RADEON_GEM_DOMAIN_CPU) {
        return -EINVAL;
    }
    /* use bit field hash function to determine
       if this bo is for sure not in this cs.*/
    if ((atomic_read((atomic_t *)radeon_gem_get_reloc_in_cs(bo)) & cs->id)) {
        /* check if bo is already referenced.
         * Scanning from end to begin reduces cycles with mesa because
         * it often relocates same shared dma bo again. */
        for(i = cs->crelocs; i != 0;) {
            --i;
            idx = i * RELOC_SIZE;
            reloc = (struct cs_reloc_gem*)&csg->relocs[idx];
            if (reloc->handle == bo->handle) {
                /* Check domains must be in read or write. As we check already
                 * checked that in argument one of the read or write domain was
                 * set we only need to check that if previous reloc as the read
                 * domain set then the read_domain should also be set for this
                 * new relocation.
                 */
                /* the DDX expects to read and write from same pixmap */
                if (write_domain && (reloc->read_domain & write_domain)) {
                    reloc->read_domain = 0;
                    reloc->write_domain = write_domain;
                } else if (read_domain & reloc->write_domain) {
                    reloc->read_domain = 0;
                } else {
                    if (write_domain != reloc->write_domain)
                        return -EINVAL;
                    if (read_domain != reloc->read_domain)
                        return -EINVAL;
                }

                reloc->read_domain |= read_domain;
                reloc->write_domain |= write_domain;
                /* update flags */
                reloc->flags |= (flags & reloc->flags);
                /* write relocation packet */
                radeon_cs_write_dword((struct radeon_cs *)cs, 0xc0001000);
                radeon_cs_write_dword((struct radeon_cs *)cs, idx);
                return 0;
            }
        }
    }
    /* new relocation */
    if (csg->base.crelocs >= csg->nrelocs) {
        /* allocate more memory (TODO: should use a slab allocatore maybe) */
        uint32_t *tmp, size;
        size = ((csg->nrelocs + 1) * sizeof(struct radeon_bo*));
        tmp = (uint32_t*)realloc(csg->relocs_bo, size);
        if (tmp == NULL) {
            return -ENOMEM;
        }
        csg->relocs_bo = (struct radeon_bo_int **)tmp;
        size = ((csg->nrelocs + 1) * RELOC_SIZE * 4);
        tmp = (uint32_t*)realloc(csg->relocs, size);
        if (tmp == NULL) {
            return -ENOMEM;
        }
        cs->relocs = csg->relocs = tmp;
        csg->nrelocs += 1;
        csg->chunks[1].chunk_data = (uint64_t)(uintptr_t)csg->relocs;
    }
    csg->relocs_bo[csg->base.crelocs] = boi;
    idx = (csg->base.crelocs++) * RELOC_SIZE;
    reloc = (struct cs_reloc_gem*)&csg->relocs[idx];
    reloc->handle = bo->handle;
    reloc->read_domain = read_domain;
    reloc->write_domain = write_domain;
    reloc->flags = flags;
    csg->chunks[1].length_dw += RELOC_SIZE;
    radeon_bo_ref(bo);
    /* bo might be referenced from another context so have to use atomic opertions */
    atomic_add((atomic_t *)radeon_gem_get_reloc_in_cs(bo), cs->id);
    cs->relocs_total_size += boi->size;
    radeon_cs_write_dword((struct radeon_cs *)cs, 0xc0001000);
    radeon_cs_write_dword((struct radeon_cs *)cs, idx);
    return 0;
}

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static void free_id ( uint32_t  id) [static]

Free the id for later reuse.

Definition at line 113 of file radeon_cs_gem.c.

{
    pthread_mutex_lock( &id_mutex );

    cs_id_source &= ~id;

    pthread_mutex_unlock( &id_mutex );
}

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static uint32_t generate_id ( void  ) [static]

Returns a free id for cs.

If there is no free id we return zero

Definition at line 94 of file radeon_cs_gem.c.

{
    uint32_t r = 0;
    pthread_mutex_lock( &id_mutex );
    /* check for free ids */
    if (cs_id_source != ~r) {
        /* find first zero bit */
        r = get_first_zero(cs_id_source);

        /* set id as reserved */
        cs_id_source |= r;
    }
    pthread_mutex_unlock( &id_mutex );
    return r;
}

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static uint32_t get_first_zero ( const uint32_t  n) [static]

result is undefined if called with ~0

Definition at line 84 of file radeon_cs_gem.c.

{
    /* __builtin_ctz returns number of trailing zeros. */
    return 1 << __builtin_ctz(~n);
}

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struct radeon_cs_manager* radeon_cs_manager_gem_ctor ( int  fd) [read]

Definition at line 531 of file radeon_cs_gem.c.

{
    struct radeon_cs_manager_gem *csm;

    csm = calloc(1, sizeof(struct radeon_cs_manager_gem));
    if (csm == NULL) {
        return NULL;
    }
    csm->base.funcs = &radeon_cs_gem_funcs;
    csm->base.fd = fd;
    radeon_get_device_id(fd, &csm->device_id);
    return &csm->base;
}

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Definition at line 545 of file radeon_cs_gem.c.

{
    free(csm);
}
static int radeon_get_device_id ( int  fd,
uint32_t *  device_id 
) [static]

Definition at line 518 of file radeon_cs_gem.c.

{
    struct drm_radeon_info info = {};
    int r;

    *device_id = 0;
    info.request = RADEON_INFO_DEVICE_ID;
    info.value = (uintptr_t)device_id;
    r = drmCommandWriteRead(fd, DRM_RADEON_INFO, &info,
                            sizeof(struct drm_radeon_info));
    return r;
}

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Variable Documentation

uint32_t cs_id_source = 0 [static]

Definition at line 79 of file radeon_cs_gem.c.

pthread_mutex_t id_mutex = PTHREAD_MUTEX_INITIALIZER [static]

Definition at line 78 of file radeon_cs_gem.c.

struct radeon_cs_funcs [static]