static inline uint64_t
select_ddp_flags(struct socket *so, int flags, int db_idx)
{
uint64_t ddp_flags = V_TF_DDP_INDICATE_OUT(0);
int waitall = flags & MSG_WAITALL;
int nb = so->so_state & SS_NBIO || flags & (MSG_DONTWAIT | MSG_NBIO);
KASSERT(db_idx == 0 || db_idx == 1,
("%s: bad DDP buffer index %d", __func__, db_idx));
if (db_idx == 0) {
ddp_flags |= V_TF_DDP_BUF0_VALID(1) | V_TF_DDP_ACTIVE_BUF(0);
if (waitall)
ddp_flags |= V_TF_DDP_PUSH_DISABLE_0(1);
else if (nb)
ddp_flags |= V_TF_DDP_BUF0_FLUSH(1);
else
ddp_flags |= V_TF_DDP_BUF0_FLUSH(0);
} else {
ddp_flags |= V_TF_DDP_BUF1_VALID(1) | V_TF_DDP_ACTIVE_BUF(1);
if (waitall)
ddp_flags |= V_TF_DDP_PUSH_DISABLE_1(1);
else if (nb)
ddp_flags |= V_TF_DDP_BUF1_FLUSH(1);
else
ddp_flags |= V_TF_DDP_BUF1_FLUSH(0);
}
return (ddp_flags);
}
/*
* Reposts the kernel DDP buffer after it has been previously become full and
* invalidated. We just need to reset the offset and adjust the DDP flags.
* Conveniently, we can set the flags and the offset with a single message.
* Note that this function does not set the buffer length. Again conveniently
* our kernel buffer is of fixed size. If the length needs to be changed it
* needs to be done separately.
*/
static void
t3_repost_kbuf(struct toepcb *toep, unsigned int bufidx, int modulate,
int activate, int nonblock)
{
struct ddp_state *p = &toep->tp_ddp_state;
unsigned long flags;
#if 0
SOCKBUF_LOCK_ASSERT(&so->so_rcv);
#endif
p->buf_state[bufidx].cur_offset = p->kbuf[bufidx]->dgl_offset;
p->buf_state[bufidx].flags = p->kbuf_noinval ? DDP_BF_NOINVAL : 0;
p->buf_state[bufidx].gl = p->kbuf[bufidx];
p->cur_buf = bufidx;
p->kbuf_idx = bufidx;
flags = select_ddp_flags(toep, bufidx, nonblock, 0);
if (!bufidx)
t3_setup_ddpbufs(toep, 0, 0, 0, 0, flags |
V_TF_DDP_PSH_NO_INVALIDATE0(p->kbuf_noinval) |
V_TF_DDP_PSH_NO_INVALIDATE1(p->kbuf_noinval) |
V_TF_DDP_BUF0_VALID(1),
V_TF_DDP_BUF0_FLUSH(1) |
V_TF_DDP_PSH_NO_INVALIDATE0(1) |
V_TF_DDP_PSH_NO_INVALIDATE1(1) | V_TF_DDP_OFF(1) |
V_TF_DDP_BUF0_VALID(1) |
V_TF_DDP_ACTIVE_BUF(activate), modulate);
else
t3_setup_ddpbufs(toep, 0, 0, 0, 0, flags |
V_TF_DDP_PSH_NO_INVALIDATE0(p->kbuf_noinval) |
V_TF_DDP_PSH_NO_INVALIDATE1(p->kbuf_noinval) |
V_TF_DDP_BUF1_VALID(1) |
V_TF_DDP_ACTIVE_BUF(activate),
V_TF_DDP_BUF1_FLUSH(1) |
V_TF_DDP_PSH_NO_INVALIDATE0(1) |
V_TF_DDP_PSH_NO_INVALIDATE1(1) | V_TF_DDP_OFF(1) |
V_TF_DDP_BUF1_VALID(1) | V_TF_DDP_ACTIVE_BUF(1),
modulate);
}
static struct wrqe *
mk_update_tcb_for_ddp(struct adapter *sc, struct toepcb *toep, int db_idx,
int offset, uint64_t ddp_flags)
{
struct ddp_buffer *db = toep->db[db_idx];
struct wrqe *wr;
struct work_request_hdr *wrh;
struct ulp_txpkt *ulpmc;
int len;
KASSERT(db_idx == 0 || db_idx == 1,
("%s: bad DDP buffer index %d", __func__, db_idx));
/*
* We'll send a compound work request that has 3 SET_TCB_FIELDs and an
* RX_DATA_ACK (with RX_MODULATE to speed up delivery).
*
* The work request header is 16B and always ends at a 16B boundary.
* The ULPTX master commands that follow must all end at 16B boundaries
* too so we round up the size to 16.
*/
len = sizeof(*wrh) + 3 * roundup2(LEN__SET_TCB_FIELD_ULP, 16) +
roundup2(LEN__RX_DATA_ACK_ULP, 16);
wr = alloc_wrqe(len, toep->ctrlq);
if (wr == NULL)
return (NULL);
wrh = wrtod(wr);
INIT_ULPTX_WRH(wrh, len, 1, 0); /* atomic */
ulpmc = (struct ulp_txpkt *)(wrh + 1);
/* Write the buffer's tag */
ulpmc = mk_set_tcb_field_ulp(ulpmc, toep,
W_TCB_RX_DDP_BUF0_TAG + db_idx,
V_TCB_RX_DDP_BUF0_TAG(M_TCB_RX_DDP_BUF0_TAG),
V_TCB_RX_DDP_BUF0_TAG(db->tag));
/* Update the current offset in the DDP buffer and its total length */
if (db_idx == 0)
ulpmc = mk_set_tcb_field_ulp(ulpmc, toep,
W_TCB_RX_DDP_BUF0_OFFSET,
V_TCB_RX_DDP_BUF0_OFFSET(M_TCB_RX_DDP_BUF0_OFFSET) |
V_TCB_RX_DDP_BUF0_LEN(M_TCB_RX_DDP_BUF0_LEN),
V_TCB_RX_DDP_BUF0_OFFSET(offset) |
V_TCB_RX_DDP_BUF0_LEN(db->len));
else
ulpmc = mk_set_tcb_field_ulp(ulpmc, toep,
W_TCB_RX_DDP_BUF1_OFFSET,
V_TCB_RX_DDP_BUF1_OFFSET(M_TCB_RX_DDP_BUF1_OFFSET) |
V_TCB_RX_DDP_BUF1_LEN((u64)M_TCB_RX_DDP_BUF1_LEN << 32),
V_TCB_RX_DDP_BUF1_OFFSET(offset) |
V_TCB_RX_DDP_BUF1_LEN((u64)db->len << 32));
/* Update DDP flags */
ulpmc = mk_set_tcb_field_ulp(ulpmc, toep, W_TCB_RX_DDP_FLAGS,
V_TF_DDP_BUF0_FLUSH(1) | V_TF_DDP_BUF1_FLUSH(1) |
V_TF_DDP_PUSH_DISABLE_0(1) | V_TF_DDP_PUSH_DISABLE_1(1) |
V_TF_DDP_BUF0_VALID(1) | V_TF_DDP_BUF1_VALID(1) |
V_TF_DDP_ACTIVE_BUF(1) | V_TF_DDP_INDICATE_OUT(1), ddp_flags);
/* Gratuitous RX_DATA_ACK with RX_MODULATE set to speed up delivery. */
ulpmc = mk_rx_data_ack_ulp(ulpmc, toep);
return (wr);
}