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libdrm  2.4.37
Classes | Functions
rbo.h File Reference
#include "list.h"
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Classes

struct  rbo

Functions

struct rborbo (int fd, unsigned handle, unsigned size, unsigned alignment, void *ptr)
int rbo_map (struct rbo *bo)
void rbo_unmap (struct rbo *bo)
struct rborbo_incref (struct rbo *bo)
struct rborbo_decref (struct rbo *bo)
int rbo_wait (struct rbo *bo)

Class Documentation

struct rbo

Definition at line 31 of file rbo.h.

Class Members
unsigned alignment
void * data
int fd
unsigned handle
unsigned mapcount
unsigned refcount
unsigned size

Function Documentation

struct rbo* rbo ( int  fd,
unsigned  handle,
unsigned  size,
unsigned  alignment,
void *  ptr 
) [read]

Definition at line 36 of file rbo.c.

{
    struct rbo *bo;
    int r;

    bo = calloc(1, sizeof(*bo));
    if (bo == NULL) {
        return NULL;
    }
    list_inithead(&bo->list);
    bo->fd = fd;
    bo->size = size;
    bo->handle = handle;
    bo->refcount = 1;
    bo->alignment = alignment;

    if (handle) {
        struct drm_gem_open open_arg;

        memset(&open_arg, 0, sizeof(open_arg));
        open_arg.name = handle;
        r = drmIoctl(fd, DRM_IOCTL_GEM_OPEN, &open_arg);
        if (r != 0) {
            free(bo);
            return NULL;
        }
        bo->handle = open_arg.handle;
    } else {
        struct drm_radeon_gem_create args;

        args.size = size;
        args.alignment = alignment;
        args.initial_domain = RADEON_GEM_DOMAIN_CPU;
        args.flags = 0;
        args.handle = 0;
        r = drmCommandWriteRead(fd, DRM_RADEON_GEM_CREATE,
                                &args, sizeof(args));
        bo->handle = args.handle;
        if (r) {
            fprintf(stderr, "Failed to allocate :\n");
            fprintf(stderr, "   size      : %d bytes\n", size);
            fprintf(stderr, "   alignment : %d bytes\n", alignment);
            free(bo);
            return NULL;
        }
    }
    if (ptr) {
        if (rbo_map(bo)) {
            fprintf(stderr, "%s failed to copy data into bo\n", __func__);
            return rbo_decref(bo);
        }
        memcpy(bo->data, ptr, size);
        rbo_unmap(bo);
    }
    return bo;
}

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struct rbo* rbo_decref ( struct rbo bo) [read]

Definition at line 139 of file rbo.c.

{
    struct drm_gem_close args;

    if (bo == NULL)
        return NULL;
    if (--bo->refcount > 0) {
        return NULL;
    }

    munmap(bo->data, bo->size);
    memset(&args, 0, sizeof(args));
    args.handle = bo->handle;
    drmIoctl(bo->fd, DRM_IOCTL_GEM_CLOSE, &args);
    memset(bo, 0, sizeof(struct rbo));
    free(bo);
    return NULL;
}

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struct rbo* rbo_incref ( struct rbo bo) [read]

Definition at line 133 of file rbo.c.

{
    bo->refcount++;
    return bo;
}
int rbo_map ( struct rbo bo)

Definition at line 94 of file rbo.c.

{
    struct drm_radeon_gem_mmap args;
    void *ptr;
    int r;

    if (bo->mapcount++ != 0) {
        return 0;
    }
    /* Zero out args to make valgrind happy */
    memset(&args, 0, sizeof(args));
    args.handle = bo->handle;
    args.offset = 0;
    args.size = (uint64_t)bo->size;
    r = drmCommandWriteRead(bo->fd, DRM_RADEON_GEM_MMAP,
                            &args, sizeof(args));
    if (r) {
        fprintf(stderr, "error mapping %p 0x%08X (error = %d)\n",
            bo, bo->handle, r);
        return r;
    }
    ptr = mmap(0, args.size, PROT_READ|PROT_WRITE, MAP_SHARED, bo->fd, args.addr_ptr);
    if (ptr == MAP_FAILED) {
        fprintf(stderr, "%s failed to map bo\n", __func__);
        return -errno;
    }
    bo->data = ptr;
    return 0;
}

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void rbo_unmap ( struct rbo bo)

Definition at line 124 of file rbo.c.

{
    if (--bo->mapcount > 0) {
        return;
    }
    munmap(bo->data, bo->size);
    bo->data = NULL;
}

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int rbo_wait ( struct rbo bo)

Definition at line 158 of file rbo.c.

{
    struct drm_radeon_gem_wait_idle args;
    int ret;

    /* Zero out args to make valgrind happy */
    memset(&args, 0, sizeof(args));
    args.handle = bo->handle;
    do {
        ret = drmCommandWriteRead(bo->fd, DRM_RADEON_GEM_WAIT_IDLE,
                                  &args, sizeof(args));
    } while (ret == -EBUSY);
    return ret;
}

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