static int pp_check_ntb(struct ntb_dev *ntb)
{
u64 pmask;
if (ntb_db_is_unsafe(ntb)) {
dev_dbg(&ntb->dev, "Doorbell is unsafe\n");
if (!unsafe)
return -EINVAL;
}
if (ntb_spad_is_unsafe(ntb)) {
dev_dbg(&ntb->dev, "Scratchpad is unsafe\n");
if (!unsafe)
return -EINVAL;
}
pmask = GENMASK_ULL(ntb_peer_port_count(ntb), 0);
if ((ntb_db_valid_mask(ntb) & pmask) != pmask) {
dev_err(&ntb->dev, "Unsupported DB configuration\n");
return -EINVAL;
}
if (ntb_spad_count(ntb) < 1 && ntb_msg_count(ntb) < 1) {
dev_err(&ntb->dev, "Scratchpads and messages unsupported\n");
return -EINVAL;
} else if (ntb_spad_count(ntb) < 1) {
dev_dbg(&ntb->dev, "Scratchpads unsupported\n");
} else if (ntb_msg_count(ntb) < 1) {
dev_dbg(&ntb->dev, "Messages unsupported\n");
}
return 0;
}
static int pp_mask_events(struct pp_ctx *pp)
{
u64 db_mask, msg_mask;
int ret;
db_mask = ntb_db_valid_mask(pp->ntb);
ret = ntb_db_set_mask(pp->ntb, db_mask);
if (ret)
return ret;
/* Skip message events masking if unsupported */
if (ntb_msg_count(pp->ntb) < 1)
return 0;
msg_mask = ntb_msg_outbits(pp->ntb) | ntb_msg_inbits(pp->ntb);
return ntb_msg_set_mask(pp->ntb, msg_mask);
}
static int
ntb_transport_probe(struct ntb_softc *ntb)
{
struct ntb_transport_ctx *nt = &net_softc;
struct ntb_transport_mw *mw;
uint64_t qp_bitmap;
int rc;
unsigned i;
nt->mw_count = ntb_mw_count(ntb);
for (i = 0; i < nt->mw_count; i++) {
mw = &nt->mw_vec[i];
rc = ntb_mw_get_range(ntb, i, &mw->phys_addr, &mw->vbase,
&mw->phys_size, &mw->xlat_align, &mw->xlat_align_size,
&mw->addr_limit);
if (rc != 0)
goto err;
mw->buff_size = 0;
mw->xlat_size = 0;
mw->virt_addr = NULL;
mw->dma_addr = 0;
}
qp_bitmap = ntb_db_valid_mask(ntb);
nt->qp_count = flsll(qp_bitmap);
KASSERT(nt->qp_count != 0, ("bogus db bitmap"));
nt->qp_count -= 1;
if (max_num_clients != 0 && max_num_clients < nt->qp_count)
nt->qp_count = max_num_clients;
else if (nt->mw_count < nt->qp_count)
nt->qp_count = nt->mw_count;
KASSERT(nt->qp_count <= QP_SETSIZE, ("invalid qp_count"));
mtx_init(&nt->tx_lock, "ntb transport tx", NULL, MTX_DEF);
mtx_init(&nt->rx_lock, "ntb transport rx", NULL, MTX_DEF);
nt->qp_vec = malloc(nt->qp_count * sizeof(*nt->qp_vec), M_NTB_IF,
M_WAITOK | M_ZERO);
for (i = 0; i < nt->qp_count; i++) {
set_bit(i, &nt->qp_bitmap);
set_bit(i, &nt->qp_bitmap_free);
ntb_transport_init_queue(nt, i);
}
callout_init(&nt->link_work, 0);
callout_init(&nt->link_watchdog, 0);
TASK_INIT(&nt->link_cleanup, 0, ntb_transport_link_cleanup_work, nt);
rc = ntb_set_ctx(ntb, nt, &ntb_transport_ops);
if (rc != 0)
goto err;
nt->link_is_up = false;
ntb_link_enable(ntb, NTB_SPEED_AUTO, NTB_WIDTH_AUTO);
ntb_link_event(ntb);
callout_reset(&nt->link_work, 0, ntb_transport_link_work, nt);
if (enable_xeon_watchdog != 0)
callout_reset(&nt->link_watchdog, 0, xeon_link_watchdog_hb, nt);
return (0);
err:
free(nt->qp_vec, M_NTB_IF);
nt->qp_vec = NULL;
return (rc);
}
