static ssize_t
_usdf_dgram_send_iov_prefix(struct usdf_ep *ep,
struct usd_dest *dest, const struct iovec *iov,
size_t count, void *context, uint8_t cq_entry)
{
struct iovec send_iov[USDF_DGRAM_MAX_SGE];
struct usd_udp_hdr *hdr;
struct usd_qp_impl *qp;
uint32_t last_post;
struct usd_wq *wq;
size_t padding;
size_t len;
qp = to_qpi(ep->e.dg.ep_qp);
wq = &qp->uq_wq;
len = _usdf_iov_len(iov, count);
padding = USDF_HDR_BUF_ENTRY - sizeof(struct usd_udp_hdr);
hdr = (struct usd_udp_hdr *) ((char *) iov[0].iov_base +
padding);
memcpy(hdr, &dest->ds_dest.ds_udp.u_hdr, sizeof(*hdr));
_usdf_adjust_prefix_hdr(hdr, qp, len, padding);
memcpy(send_iov, iov, sizeof(struct iovec) * count);
send_iov[0].iov_base = hdr;
send_iov[0].iov_len -= padding;
last_post = _usd_post_send_iov(wq, send_iov, count, cq_entry);
_usdf_adjust_post_info(wq, last_post, context, len - USDF_HDR_BUF_ENTRY);
return FI_SUCCESS;
}
static ssize_t _usdf_dgram_send_iov(struct usdf_ep *ep, struct usd_dest *dest,
const struct iovec *iov, size_t count, void *context, uint8_t
cq_entry)
{
struct iovec send_iov[USDF_DGRAM_MAX_SGE];
struct usd_udp_hdr *hdr;
struct usd_qp_impl *qp;
struct usd_wq *wq;
uint32_t last_post;
size_t len;
qp = to_qpi(ep->e.dg.ep_qp);
wq = &qp->uq_wq;
len = _usdf_iov_len(iov, count);
hdr = _usdf_find_hdr(wq);
memcpy(hdr, &dest->ds_dest.ds_udp.u_hdr, sizeof(*hdr));
_usdf_adjust_hdr(hdr, qp, len);
send_iov[0].iov_base = hdr;
send_iov[0].iov_len = sizeof(*hdr);
memcpy(&send_iov[1], iov, sizeof(struct iovec) * count);
last_post = _usd_post_send_iov(wq, send_iov, count + 1,
cq_entry);
_usdf_adjust_post_info(wq, last_post, context, len);
return FI_SUCCESS;
}
ssize_t
usdf_dgram_prefix_sendv(struct fid_ep *fep, const struct iovec *iov, void **desc,
size_t count, fi_addr_t dest_addr, void *context)
{
struct usdf_ep *ep;
struct usd_dest *dest;
struct usd_wq *wq;
struct usd_qp_impl *qp;
struct usd_udp_hdr *hdr;
uint32_t last_post;
struct usd_wq_post_info *info;
struct iovec send_iov[USDF_DGRAM_MAX_SGE];
size_t len;
unsigned i;
size_t padding;
ep = ep_ftou(fep);
dest = (struct usd_dest *)(uintptr_t) dest_addr;
padding = USDF_HDR_BUF_ENTRY - sizeof(struct usd_udp_hdr);
len = 0;
for (i = 0; i < count; i++) {
len += iov[i].iov_len;
}
if (len + sizeof(struct usd_udp_hdr) > USD_SEND_MAX_COPY) {
qp = to_qpi(ep->e.dg.ep_qp);
wq = &qp->uq_wq;
hdr = (struct usd_udp_hdr *) ((char *) iov[0].iov_base +
padding);
memcpy(hdr, &dest->ds_dest.ds_udp.u_hdr, sizeof(*hdr));
/* adjust lengths and insert source port */
hdr->uh_ip.tot_len = htons(len - padding -
sizeof(struct ether_header));
hdr->uh_udp.len = htons(len - padding -
sizeof(struct ether_header) -
sizeof(struct iphdr));
hdr->uh_udp.source =
qp->uq_attrs.uqa_local_addr.ul_addr.ul_udp.u_addr.sin_port;
memcpy(send_iov, iov, sizeof(struct iovec) * count);
send_iov[0].iov_base = hdr;
send_iov[0].iov_len -= padding;
last_post = _usd_post_send_iov(wq, send_iov, count, 1);
info = &wq->uwq_post_info[last_post];
info->wp_context = context;
info->wp_len = len;
} else {
_usdf_dgram_send_iov_copy(ep, dest, iov, count, context);
}
return 0;
}
