/*---------------------------------------------------------------------------*/
int xio_validate_rdma_op(struct xio_vmsg *vmsg,
struct xio_sge *rsg_list, size_t rsize,
int max_sge,
int op_size,
int *tasks_used)
{
struct sg_table *sgtbl;
struct scatterlist *liov;
uint64_t raddr;
uint32_t rlen;
uint64_t laddr;
uint32_t llen;
uint32_t tot_len = 0;
size_t lsize, lnents;
int l, r;
int k = 0;
if (rsize < 1) {
ERROR_LOG("rsize:%zu\n", rsize);
*tasks_used = 0;
return -1;
}
sgtbl = &vmsg->data_tbl;
lnents = sgtbl->nents;
if (lnents > XIO_MAX_IOV || lnents == 0) {
WARN_LOG("IOV size %zu\n", lnents);
*tasks_used = 0;
return -EINVAL;
}
lsize = lnents;
liov = sgtbl->sgl;
r = 0;
rlen = rsg_list[r].length;
raddr = rsg_list[r].addr;
l = 0;
laddr = uint64_from_ptr(sg_virt(liov));
llen = liov->length;
/* At least one task */
*tasks_used = 1;
while (1) {
if (rlen < llen) {
r++;
tot_len += rlen;
if (r == rsize)
break;
llen -= rlen;
laddr += rlen;
raddr = rsg_list[r].addr;
rlen = rsg_list[r].length;
(*tasks_used)++;
k = 0;
} else if (llen < rlen) {
/* check page alignment when source buff spans more
* then one destination buffer */
l++;
tot_len += llen;
if (l == lsize)
break;
k++;
if (k == max_sge - 1) {
/* reached last index */
(*tasks_used)++;
k = 0;
}
rlen -= llen;
raddr += llen;
laddr = uint64_from_ptr(sg_virt(liov));
llen = liov->length;
} else {
l++;
r++;
tot_len += llen;
if ((l == lsize) || (r == rsize))
break;
laddr = uint64_from_ptr(sg_virt(liov));
llen = liov->length;
raddr = rsg_list[r].addr;
rlen = rsg_list[r].length;
(*tasks_used)++;
k = 0;
}
}
/* not enough buffers to complete */
if (tot_len < op_size) {
*tasks_used = 0;
ERROR_LOG("iovec exhausted\n");
return -1;
}
return 0;
}
int xio_validate_rdma_op(struct xio_vmsg *vmsg,
struct xio_sge *rsg_list, size_t rsize,
int op_size)
{
struct xio_iovec_ex *liov;
uint64_t raddr;
uint32_t rlen;
uint64_t laddr;
uint32_t llen;
uint32_t tot_len = 0;
size_t lsize;
int l, r;
if (rsize < 1) {
ERROR_LOG("rsize:%zu\n", rsize);
return -1;
}
if (vmsg->data_iovlen > XIO_MAX_IOV || vmsg->data_iovlen == 0) {
WARN_LOG("IOV size %zu\n", vmsg->data_iovlen);
return -EINVAL;
}
lsize = vmsg->data_iovlen;
liov = vmsg->data_iov;
r = 0;
rlen = rsg_list[r].length;
raddr = rsg_list[r].addr;
l = 0;
laddr = uint64_from_ptr(liov[l].iov_base);
llen = liov[l].iov_len;
while (1) {
if (rlen < llen) {
r++;
tot_len += rlen;
if (r == rsize)
break;
llen -= rlen;
laddr += rlen;
raddr = rsg_list[r].addr;
rlen = rsg_list[r].length;
} else if (llen < rlen) {
/* check page alignment when source buff spans more
* then one destination buffer */
l++;
tot_len += llen;
if (l == lsize)
break;
rlen -= llen;
raddr += llen;
laddr = uint64_from_ptr(liov[l].iov_base);
llen = liov[l].iov_len;
} else {
l++;
r++;
tot_len += llen;
if ((l == lsize) || (r == rsize))
break;
laddr = uint64_from_ptr(liov[l].iov_base);
llen = liov[l].iov_len;
raddr = rsg_list[r].addr;
rlen = rsg_list[r].length;
}
}
/* not enough buffers to complete */
if (tot_len < op_size) {
ERROR_LOG("iovec exausted\n");
return -1;
}
return 0;
}
