static boolean_t
dlpi_walk_cb(const char *name, void *arg)
{
NOTE(ARGUNUSED(arg))
dlpi_handle_t dlh;
link_t *link;
int rc;
dlpi_info_t info;
boolean_t keep;
size_t len;
rc = dlpi_open(name, &dlh, DLPI_PASSIVE|DLPI_NATIVE);
if (rc != DLPI_SUCCESS) {
DMSG(D_NET, "dlpi_open(%s) failed: %s; skipping.",
name, dlpi_strerror(rc));
return (B_TRUE);
}
rc = dlpi_info(dlh, &info, 0);
if (rc != DLPI_SUCCESS) {
DMSG(D_NET, "dlpi_info(%s) failed: %s; skipping.",
name, dlpi_strerror(rc));
dlpi_close(dlh);
return (B_TRUE);
}
keep = !!(info.di_mactype == DL_ETHER);
DMSG(D_NET, "found link %s, mactype = %s (%d)%s.", name,
dlpi_mactype(info.di_mactype), info.di_mactype,
(keep) ? "" : "; discarding");
dlpi_close(dlh);
if (!keep)
return (B_TRUE);
VERIFY((link = link_alloc(name)) != NULL);
list_insert_tail(&links, (void *)link);
num_links++;
if ((len = strlen(name)) > link_max_len)
link_max_len = len;
return (B_TRUE);
}
int gpuvm_link(void *hostptr, size_t nbytes, unsigned idev, void *devbuf, int
flags) {
//fprintf(stderr, "linking\n");
// check arguments
if(!hostptr) {
fprintf(stderr, "gpuvm_link: hostptr is NULL\n");
return GPUVM_ENULL;
}
if(nbytes == 0) {
fprintf(stderr, "gpuvm_link: nbytes is zero\n");
return GPUVM_EARG;
}
if(idev >= ndevs_g) {
fprintf(stderr, "gpuvm_link: invalid device number\n");
return GPUVM_EARG;
}
if((flags & ~GPUVM_API) != GPUVM_ON_HOST &&
(flags & ~GPUVM_API) != GPUVM_ON_DEVICE) {
fprintf(stderr, "gpuvm_link: invalid flags\n");
return GPUVM_EARG;
}
if(!devbuf) {
fprintf(stderr, "gpuvm_link: device buffer cannot be null\n");
return GPUVM_ENULL;
}
// lock writer data structure
if(lock_writer())
return GPUVM_ERROR;
// find an array intersecting specified range
host_array_t *host_array = 0;
if(host_array_find(&host_array, hostptr, nbytes)) {
//fprintf(stderr, "gpuvm_link: intersecting range already registered with GPUVM\n");
//fprintf(stderr, "ptr=%p, nbytes=%zd, rangeptr=%p, rangenbytes=%zd\n",
// hostptr, nbytes, host_array->range.ptr, host_array->range.nbytes);
unlock_writer();
return GPUVM_ERANGE;
}
//fprintf(stderr, "host array search finished\n");
if(host_array) {
if(host_array->links[idev]) {
//fprintf(stderr, "gpuvm_link: link on specified device already exists\n");
unlock_writer();
return GPUVM_ELINK;
}
if(flags & GPUVM_ON_DEVICE) {
//fprintf(stderr, "gpuvm_link: on-device linking of a registered "
// "array is not allowed\n");
unlock_writer();
return GPUVM_ETWICE;
}
}
// allocate an array if not found
host_array_t *new_host_array = 0;
int err = 0;
if(!host_array) {
err = host_array_alloc(&new_host_array, hostptr, nbytes,
flags & GPUVM_ON_DEVICE ? idev : -1);
//fprintf(stderr, "new host array allocated\n");
if(err) {
unlock_writer();
return err;
}
host_array = new_host_array;
} else {
//fprintf(stderr, "using old host array\n");
}
// create a link with an array (and assign it into the array)
link_t *link = 0;
err = link_alloc(&link, devbuf, idev, host_array);
//fprintf(stderr, "new link allocated\n");
if(err) {
host_array_free(new_host_array);
unlock_writer();
return err;
}
if(unlock_writer())
return GPUVM_ERROR;
//fprintf(stderr, "hostptr %p registered with libgpuvm\n", hostptr);
return 0;
} // gpuvm_link