1e948693eSPhilip Paeps /*- 2e948693eSPhilip Paeps * Copyright (c) 2010-2011 Solarflare Communications, Inc. 3e948693eSPhilip Paeps * All rights reserved. 4e948693eSPhilip Paeps * 5e948693eSPhilip Paeps * This software was developed in part by Philip Paeps under contract for 6e948693eSPhilip Paeps * Solarflare Communications, Inc. 7e948693eSPhilip Paeps * 8e948693eSPhilip Paeps * Redistribution and use in source and binary forms, with or without 9e948693eSPhilip Paeps * modification, are permitted provided that the following conditions 10e948693eSPhilip Paeps * are met: 11e948693eSPhilip Paeps * 1. Redistributions of source code must retain the above copyright 12e948693eSPhilip Paeps * notice, this list of conditions and the following disclaimer. 13e948693eSPhilip Paeps * 2. Redistributions in binary form must reproduce the above copyright 14e948693eSPhilip Paeps * notice, this list of conditions and the following disclaimer in the 15e948693eSPhilip Paeps * documentation and/or other materials provided with the distribution. 16e948693eSPhilip Paeps * 17e948693eSPhilip Paeps * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18e948693eSPhilip Paeps * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19e948693eSPhilip Paeps * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20e948693eSPhilip Paeps * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21e948693eSPhilip Paeps * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22e948693eSPhilip Paeps * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23e948693eSPhilip Paeps * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24e948693eSPhilip Paeps * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25e948693eSPhilip Paeps * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26e948693eSPhilip Paeps * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27e948693eSPhilip Paeps * SUCH DAMAGE. 28e948693eSPhilip Paeps */ 29e948693eSPhilip Paeps 30cf07c70dSGeorge V. Neville-Neil /* Theory of operation: 31cf07c70dSGeorge V. Neville-Neil * 32cf07c70dSGeorge V. Neville-Neil * Tx queues allocation and mapping 33cf07c70dSGeorge V. Neville-Neil * 34cf07c70dSGeorge V. Neville-Neil * One Tx queue with enabled checksum offload is allocated per Rx channel 35cf07c70dSGeorge V. Neville-Neil * (event queue). Also 2 Tx queues (one without checksum offload and one 36cf07c70dSGeorge V. Neville-Neil * with IP checksum offload only) are allocated and bound to event queue 0. 37cf07c70dSGeorge V. Neville-Neil * sfxge_txq_type is used as Tx queue label. 38cf07c70dSGeorge V. Neville-Neil * 39cf07c70dSGeorge V. Neville-Neil * So, event queue plus label mapping to Tx queue index is: 40cf07c70dSGeorge V. Neville-Neil * if event queue index is 0, TxQ-index = TxQ-label * [0..SFXGE_TXQ_NTYPES) 41cf07c70dSGeorge V. Neville-Neil * else TxQ-index = SFXGE_TXQ_NTYPES + EvQ-index - 1 42cf07c70dSGeorge V. Neville-Neil * See sfxge_get_txq_by_label() sfxge_ev.c 43cf07c70dSGeorge V. Neville-Neil */ 44cf07c70dSGeorge V. Neville-Neil 45e948693eSPhilip Paeps #include <sys/cdefs.h> 46e948693eSPhilip Paeps __FBSDID("$FreeBSD$"); 47e948693eSPhilip Paeps 48e948693eSPhilip Paeps #include <sys/types.h> 49e948693eSPhilip Paeps #include <sys/mbuf.h> 50e948693eSPhilip Paeps #include <sys/smp.h> 51e948693eSPhilip Paeps #include <sys/socket.h> 52e948693eSPhilip Paeps #include <sys/sysctl.h> 53060a95efSGeorge V. Neville-Neil #include <sys/syslog.h> 54e948693eSPhilip Paeps 55e948693eSPhilip Paeps #include <net/bpf.h> 56e948693eSPhilip Paeps #include <net/ethernet.h> 57e948693eSPhilip Paeps #include <net/if.h> 58e948693eSPhilip Paeps #include <net/if_vlan_var.h> 59e948693eSPhilip Paeps 60e948693eSPhilip Paeps #include <netinet/in.h> 61e948693eSPhilip Paeps #include <netinet/ip.h> 62e948693eSPhilip Paeps #include <netinet/ip6.h> 63e948693eSPhilip Paeps #include <netinet/tcp.h> 64e948693eSPhilip Paeps 65e948693eSPhilip Paeps #include "common/efx.h" 66e948693eSPhilip Paeps 67e948693eSPhilip Paeps #include "sfxge.h" 68e948693eSPhilip Paeps #include "sfxge_tx.h" 69e948693eSPhilip Paeps 7049448887SAndrew Rybchenko /* 7149448887SAndrew Rybchenko * Estimate maximum number of Tx descriptors required for TSO packet. 7249448887SAndrew Rybchenko * With minimum MSS and maximum mbuf length we might need more (even 7349448887SAndrew Rybchenko * than a ring-ful of descriptors), but this should not happen in 7449448887SAndrew Rybchenko * practice except due to deliberate attack. In that case we will 7549448887SAndrew Rybchenko * truncate the output at a packet boundary. 76e948693eSPhilip Paeps */ 7745923e76SAndrew Rybchenko #define SFXGE_TSO_MAX_DESC \ 7845923e76SAndrew Rybchenko (SFXGE_TSO_MAX_SEGS * 2 + SFXGE_TX_MAPPING_MAX_SEG - 1) 7949448887SAndrew Rybchenko 8049448887SAndrew Rybchenko /* 8149448887SAndrew Rybchenko * Set the block level to ensure there is space to generate a 8249448887SAndrew Rybchenko * large number of descriptors for TSO. 8349448887SAndrew Rybchenko */ 8449448887SAndrew Rybchenko #define SFXGE_TXQ_BLOCK_LEVEL(_entries) \ 8549448887SAndrew Rybchenko (EFX_TXQ_LIMIT(_entries) - SFXGE_TSO_MAX_DESC) 86e948693eSPhilip Paeps 87060a95efSGeorge V. Neville-Neil 88060a95efSGeorge V. Neville-Neil #define SFXGE_PARAM_TX_DPL_GET_MAX SFXGE_PARAM(tx_dpl_get_max) 89060a95efSGeorge V. Neville-Neil static int sfxge_tx_dpl_get_max = SFXGE_TX_DPL_GET_PKT_LIMIT_DEFAULT; 90060a95efSGeorge V. Neville-Neil TUNABLE_INT(SFXGE_PARAM_TX_DPL_GET_MAX, &sfxge_tx_dpl_get_max); 91060a95efSGeorge V. Neville-Neil SYSCTL_INT(_hw_sfxge, OID_AUTO, tx_dpl_get_max, CTLFLAG_RDTUN, 92060a95efSGeorge V. Neville-Neil &sfxge_tx_dpl_get_max, 0, 9393929f25SAndrew Rybchenko "Maximum number of any packets in deferred packet get-list"); 9493929f25SAndrew Rybchenko 9593929f25SAndrew Rybchenko #define SFXGE_PARAM_TX_DPL_GET_NON_TCP_MAX \ 9693929f25SAndrew Rybchenko SFXGE_PARAM(tx_dpl_get_non_tcp_max) 9793929f25SAndrew Rybchenko static int sfxge_tx_dpl_get_non_tcp_max = 9893929f25SAndrew Rybchenko SFXGE_TX_DPL_GET_NON_TCP_PKT_LIMIT_DEFAULT; 9993929f25SAndrew Rybchenko TUNABLE_INT(SFXGE_PARAM_TX_DPL_GET_NON_TCP_MAX, &sfxge_tx_dpl_get_non_tcp_max); 10093929f25SAndrew Rybchenko SYSCTL_INT(_hw_sfxge, OID_AUTO, tx_dpl_get_non_tcp_max, CTLFLAG_RDTUN, 10193929f25SAndrew Rybchenko &sfxge_tx_dpl_get_non_tcp_max, 0, 10293929f25SAndrew Rybchenko "Maximum number of non-TCP packets in deferred packet get-list"); 103060a95efSGeorge V. Neville-Neil 104060a95efSGeorge V. Neville-Neil #define SFXGE_PARAM_TX_DPL_PUT_MAX SFXGE_PARAM(tx_dpl_put_max) 105060a95efSGeorge V. Neville-Neil static int sfxge_tx_dpl_put_max = SFXGE_TX_DPL_PUT_PKT_LIMIT_DEFAULT; 106060a95efSGeorge V. Neville-Neil TUNABLE_INT(SFXGE_PARAM_TX_DPL_PUT_MAX, &sfxge_tx_dpl_put_max); 107060a95efSGeorge V. Neville-Neil SYSCTL_INT(_hw_sfxge, OID_AUTO, tx_dpl_put_max, CTLFLAG_RDTUN, 108060a95efSGeorge V. Neville-Neil &sfxge_tx_dpl_put_max, 0, 10993929f25SAndrew Rybchenko "Maximum number of any packets in deferred packet put-list"); 110060a95efSGeorge V. Neville-Neil 111060a95efSGeorge V. Neville-Neil 112f6222d7bSAndrew Rybchenko static const struct { 113f6222d7bSAndrew Rybchenko const char *name; 114f6222d7bSAndrew Rybchenko size_t offset; 115f6222d7bSAndrew Rybchenko } sfxge_tx_stats[] = { 116f6222d7bSAndrew Rybchenko #define SFXGE_TX_STAT(name, member) \ 117f6222d7bSAndrew Rybchenko { #name, offsetof(struct sfxge_txq, member) } 118f6222d7bSAndrew Rybchenko SFXGE_TX_STAT(tso_bursts, tso_bursts), 119f6222d7bSAndrew Rybchenko SFXGE_TX_STAT(tso_packets, tso_packets), 120f6222d7bSAndrew Rybchenko SFXGE_TX_STAT(tso_long_headers, tso_long_headers), 121f6222d7bSAndrew Rybchenko SFXGE_TX_STAT(tso_pdrop_too_many, tso_pdrop_too_many), 122f6222d7bSAndrew Rybchenko SFXGE_TX_STAT(tso_pdrop_no_rsrc, tso_pdrop_no_rsrc), 123f6222d7bSAndrew Rybchenko SFXGE_TX_STAT(tx_collapses, collapses), 124f6222d7bSAndrew Rybchenko SFXGE_TX_STAT(tx_drops, drops), 125f6222d7bSAndrew Rybchenko SFXGE_TX_STAT(tx_get_overflow, get_overflow), 126f6222d7bSAndrew Rybchenko SFXGE_TX_STAT(tx_get_non_tcp_overflow, get_non_tcp_overflow), 127f6222d7bSAndrew Rybchenko SFXGE_TX_STAT(tx_put_overflow, put_overflow), 128f6222d7bSAndrew Rybchenko SFXGE_TX_STAT(tx_netdown_drops, netdown_drops), 129f6222d7bSAndrew Rybchenko }; 130f6222d7bSAndrew Rybchenko 131f6222d7bSAndrew Rybchenko 132e948693eSPhilip Paeps /* Forward declarations. */ 1330b28bbdcSAndrew Rybchenko static void sfxge_tx_qdpl_service(struct sfxge_txq *txq); 134e948693eSPhilip Paeps static void sfxge_tx_qlist_post(struct sfxge_txq *txq); 135e948693eSPhilip Paeps static void sfxge_tx_qunblock(struct sfxge_txq *txq); 136e948693eSPhilip Paeps static int sfxge_tx_queue_tso(struct sfxge_txq *txq, struct mbuf *mbuf, 137e948693eSPhilip Paeps const bus_dma_segment_t *dma_seg, int n_dma_seg); 138e948693eSPhilip Paeps 139e948693eSPhilip Paeps void 140cc933626SAndrew Rybchenko sfxge_tx_qcomplete(struct sfxge_txq *txq, struct sfxge_evq *evq) 141e948693eSPhilip Paeps { 142e948693eSPhilip Paeps unsigned int completed; 143e948693eSPhilip Paeps 144763cab71SAndrew Rybchenko SFXGE_EVQ_LOCK_ASSERT_OWNED(evq); 145e948693eSPhilip Paeps 146e948693eSPhilip Paeps completed = txq->completed; 147e948693eSPhilip Paeps while (completed != txq->pending) { 148e948693eSPhilip Paeps struct sfxge_tx_mapping *stmp; 149e948693eSPhilip Paeps unsigned int id; 150e948693eSPhilip Paeps 151385b1d8eSGeorge V. Neville-Neil id = completed++ & txq->ptr_mask; 152e948693eSPhilip Paeps 153e948693eSPhilip Paeps stmp = &txq->stmp[id]; 154e948693eSPhilip Paeps if (stmp->flags & TX_BUF_UNMAP) { 155e948693eSPhilip Paeps bus_dmamap_unload(txq->packet_dma_tag, stmp->map); 156e948693eSPhilip Paeps if (stmp->flags & TX_BUF_MBUF) { 157e948693eSPhilip Paeps struct mbuf *m = stmp->u.mbuf; 158e948693eSPhilip Paeps do 159e948693eSPhilip Paeps m = m_free(m); 160e948693eSPhilip Paeps while (m != NULL); 161e948693eSPhilip Paeps } else { 162e948693eSPhilip Paeps free(stmp->u.heap_buf, M_SFXGE); 163e948693eSPhilip Paeps } 164e948693eSPhilip Paeps stmp->flags = 0; 165e948693eSPhilip Paeps } 166e948693eSPhilip Paeps } 167e948693eSPhilip Paeps txq->completed = completed; 168e948693eSPhilip Paeps 169e948693eSPhilip Paeps /* Check whether we need to unblock the queue. */ 170e948693eSPhilip Paeps mb(); 171e948693eSPhilip Paeps if (txq->blocked) { 172e948693eSPhilip Paeps unsigned int level; 173e948693eSPhilip Paeps 174e948693eSPhilip Paeps level = txq->added - txq->completed; 175385b1d8eSGeorge V. Neville-Neil if (level <= SFXGE_TXQ_UNBLOCK_LEVEL(txq->entries)) 176e948693eSPhilip Paeps sfxge_tx_qunblock(txq); 177e948693eSPhilip Paeps } 178e948693eSPhilip Paeps } 179e948693eSPhilip Paeps 1800b28bbdcSAndrew Rybchenko static unsigned int 18193929f25SAndrew Rybchenko sfxge_is_mbuf_non_tcp(struct mbuf *mbuf) 18293929f25SAndrew Rybchenko { 18393929f25SAndrew Rybchenko /* Absense of TCP checksum flags does not mean that it is non-TCP 18493929f25SAndrew Rybchenko * but it should be true if user wants to achieve high throughput. 18593929f25SAndrew Rybchenko */ 18693929f25SAndrew Rybchenko return (!(mbuf->m_pkthdr.csum_flags & (CSUM_IP_TCP | CSUM_IP6_TCP))); 18793929f25SAndrew Rybchenko } 18893929f25SAndrew Rybchenko 189e948693eSPhilip Paeps /* 190e948693eSPhilip Paeps * Reorder the put list and append it to the get list. 191e948693eSPhilip Paeps */ 192e948693eSPhilip Paeps static void 193e948693eSPhilip Paeps sfxge_tx_qdpl_swizzle(struct sfxge_txq *txq) 194e948693eSPhilip Paeps { 195e948693eSPhilip Paeps struct sfxge_tx_dpl *stdp; 196e948693eSPhilip Paeps struct mbuf *mbuf, *get_next, **get_tailp; 197e948693eSPhilip Paeps volatile uintptr_t *putp; 198e948693eSPhilip Paeps uintptr_t put; 199e948693eSPhilip Paeps unsigned int count; 20093929f25SAndrew Rybchenko unsigned int non_tcp_count; 201e948693eSPhilip Paeps 202763cab71SAndrew Rybchenko SFXGE_TXQ_LOCK_ASSERT_OWNED(txq); 203e948693eSPhilip Paeps 204e948693eSPhilip Paeps stdp = &txq->dpl; 205e948693eSPhilip Paeps 206e948693eSPhilip Paeps /* Acquire the put list. */ 207e948693eSPhilip Paeps putp = &stdp->std_put; 208fb8ccc78SMarius Strobl put = atomic_readandclear_ptr(putp); 209e948693eSPhilip Paeps mbuf = (void *)put; 210e948693eSPhilip Paeps 211e948693eSPhilip Paeps if (mbuf == NULL) 212e948693eSPhilip Paeps return; 213e948693eSPhilip Paeps 214e948693eSPhilip Paeps /* Reverse the put list. */ 215e948693eSPhilip Paeps get_tailp = &mbuf->m_nextpkt; 216e948693eSPhilip Paeps get_next = NULL; 217e948693eSPhilip Paeps 218e948693eSPhilip Paeps count = 0; 21993929f25SAndrew Rybchenko non_tcp_count = 0; 220e948693eSPhilip Paeps do { 221e948693eSPhilip Paeps struct mbuf *put_next; 222e948693eSPhilip Paeps 22393929f25SAndrew Rybchenko non_tcp_count += sfxge_is_mbuf_non_tcp(mbuf); 224e948693eSPhilip Paeps put_next = mbuf->m_nextpkt; 225e948693eSPhilip Paeps mbuf->m_nextpkt = get_next; 226e948693eSPhilip Paeps get_next = mbuf; 227e948693eSPhilip Paeps mbuf = put_next; 228e948693eSPhilip Paeps 229e948693eSPhilip Paeps count++; 230e948693eSPhilip Paeps } while (mbuf != NULL); 231e948693eSPhilip Paeps 232bce6d281SAndrew Rybchenko if (count > stdp->std_put_hiwat) 233bce6d281SAndrew Rybchenko stdp->std_put_hiwat = count; 234bce6d281SAndrew Rybchenko 235e948693eSPhilip Paeps /* Append the reversed put list to the get list. */ 236e948693eSPhilip Paeps KASSERT(*get_tailp == NULL, ("*get_tailp != NULL")); 237e948693eSPhilip Paeps *stdp->std_getp = get_next; 238e948693eSPhilip Paeps stdp->std_getp = get_tailp; 239bc85c897SGeorge V. Neville-Neil stdp->std_get_count += count; 24093929f25SAndrew Rybchenko stdp->std_get_non_tcp_count += non_tcp_count; 241e948693eSPhilip Paeps } 242e948693eSPhilip Paeps 243e948693eSPhilip Paeps static void 244e948693eSPhilip Paeps sfxge_tx_qreap(struct sfxge_txq *txq) 245e948693eSPhilip Paeps { 246763cab71SAndrew Rybchenko SFXGE_TXQ_LOCK_ASSERT_OWNED(txq); 247e948693eSPhilip Paeps 248e948693eSPhilip Paeps txq->reaped = txq->completed; 249e948693eSPhilip Paeps } 250e948693eSPhilip Paeps 251e948693eSPhilip Paeps static void 252e948693eSPhilip Paeps sfxge_tx_qlist_post(struct sfxge_txq *txq) 253e948693eSPhilip Paeps { 254e948693eSPhilip Paeps unsigned int old_added; 255e948693eSPhilip Paeps unsigned int level; 256e948693eSPhilip Paeps int rc; 257e948693eSPhilip Paeps 258763cab71SAndrew Rybchenko SFXGE_TXQ_LOCK_ASSERT_OWNED(txq); 259e948693eSPhilip Paeps 260e948693eSPhilip Paeps KASSERT(txq->n_pend_desc != 0, ("txq->n_pend_desc == 0")); 261e948693eSPhilip Paeps KASSERT(txq->n_pend_desc <= SFXGE_TSO_MAX_DESC, 262e948693eSPhilip Paeps ("txq->n_pend_desc too large")); 263e948693eSPhilip Paeps KASSERT(!txq->blocked, ("txq->blocked")); 264e948693eSPhilip Paeps 265e948693eSPhilip Paeps old_added = txq->added; 266e948693eSPhilip Paeps 267e948693eSPhilip Paeps /* Post the fragment list. */ 268e948693eSPhilip Paeps rc = efx_tx_qpost(txq->common, txq->pend_desc, txq->n_pend_desc, 269e948693eSPhilip Paeps txq->reaped, &txq->added); 270e948693eSPhilip Paeps KASSERT(rc == 0, ("efx_tx_qpost() failed")); 271e948693eSPhilip Paeps 272e948693eSPhilip Paeps /* If efx_tx_qpost() had to refragment, our information about 273e948693eSPhilip Paeps * buffers to free may be associated with the wrong 274e948693eSPhilip Paeps * descriptors. 275e948693eSPhilip Paeps */ 276e948693eSPhilip Paeps KASSERT(txq->added - old_added == txq->n_pend_desc, 277e948693eSPhilip Paeps ("efx_tx_qpost() refragmented descriptors")); 278e948693eSPhilip Paeps 279e948693eSPhilip Paeps level = txq->added - txq->reaped; 280385b1d8eSGeorge V. Neville-Neil KASSERT(level <= txq->entries, ("overfilled TX queue")); 281e948693eSPhilip Paeps 282e948693eSPhilip Paeps /* Clear the fragment list. */ 283e948693eSPhilip Paeps txq->n_pend_desc = 0; 284e948693eSPhilip Paeps 285e948693eSPhilip Paeps /* Have we reached the block level? */ 286385b1d8eSGeorge V. Neville-Neil if (level < SFXGE_TXQ_BLOCK_LEVEL(txq->entries)) 287e948693eSPhilip Paeps return; 288e948693eSPhilip Paeps 289e948693eSPhilip Paeps /* Reap, and check again */ 290e948693eSPhilip Paeps sfxge_tx_qreap(txq); 291e948693eSPhilip Paeps level = txq->added - txq->reaped; 292385b1d8eSGeorge V. Neville-Neil if (level < SFXGE_TXQ_BLOCK_LEVEL(txq->entries)) 293e948693eSPhilip Paeps return; 294e948693eSPhilip Paeps 295e948693eSPhilip Paeps txq->blocked = 1; 296e948693eSPhilip Paeps 297e948693eSPhilip Paeps /* 298e948693eSPhilip Paeps * Avoid a race with completion interrupt handling that could leave 299e948693eSPhilip Paeps * the queue blocked. 300e948693eSPhilip Paeps */ 301e948693eSPhilip Paeps mb(); 302e948693eSPhilip Paeps sfxge_tx_qreap(txq); 303e948693eSPhilip Paeps level = txq->added - txq->reaped; 304385b1d8eSGeorge V. Neville-Neil if (level < SFXGE_TXQ_BLOCK_LEVEL(txq->entries)) { 305e948693eSPhilip Paeps mb(); 306e948693eSPhilip Paeps txq->blocked = 0; 307e948693eSPhilip Paeps } 308e948693eSPhilip Paeps } 309e948693eSPhilip Paeps 310e948693eSPhilip Paeps static int sfxge_tx_queue_mbuf(struct sfxge_txq *txq, struct mbuf *mbuf) 311e948693eSPhilip Paeps { 312e948693eSPhilip Paeps bus_dmamap_t *used_map; 313e948693eSPhilip Paeps bus_dmamap_t map; 314e948693eSPhilip Paeps bus_dma_segment_t dma_seg[SFXGE_TX_MAPPING_MAX_SEG]; 315e948693eSPhilip Paeps unsigned int id; 316e948693eSPhilip Paeps struct sfxge_tx_mapping *stmp; 317e948693eSPhilip Paeps efx_buffer_t *desc; 318e948693eSPhilip Paeps int n_dma_seg; 319e948693eSPhilip Paeps int rc; 320e948693eSPhilip Paeps int i; 321e948693eSPhilip Paeps 322e948693eSPhilip Paeps KASSERT(!txq->blocked, ("txq->blocked")); 323e948693eSPhilip Paeps 324e948693eSPhilip Paeps if (mbuf->m_pkthdr.csum_flags & CSUM_TSO) 325e948693eSPhilip Paeps prefetch_read_many(mbuf->m_data); 326e948693eSPhilip Paeps 327851128b8SAndrew Rybchenko if (__predict_false(txq->init_state != SFXGE_TXQ_STARTED)) { 328e948693eSPhilip Paeps rc = EINTR; 329e948693eSPhilip Paeps goto reject; 330e948693eSPhilip Paeps } 331e948693eSPhilip Paeps 332e948693eSPhilip Paeps /* Load the packet for DMA. */ 333385b1d8eSGeorge V. Neville-Neil id = txq->added & txq->ptr_mask; 334e948693eSPhilip Paeps stmp = &txq->stmp[id]; 335e948693eSPhilip Paeps rc = bus_dmamap_load_mbuf_sg(txq->packet_dma_tag, stmp->map, 336e948693eSPhilip Paeps mbuf, dma_seg, &n_dma_seg, 0); 337e948693eSPhilip Paeps if (rc == EFBIG) { 338e948693eSPhilip Paeps /* Try again. */ 339c6499eccSGleb Smirnoff struct mbuf *new_mbuf = m_collapse(mbuf, M_NOWAIT, 340e948693eSPhilip Paeps SFXGE_TX_MAPPING_MAX_SEG); 341e948693eSPhilip Paeps if (new_mbuf == NULL) 342e948693eSPhilip Paeps goto reject; 343e948693eSPhilip Paeps ++txq->collapses; 344e948693eSPhilip Paeps mbuf = new_mbuf; 345e948693eSPhilip Paeps rc = bus_dmamap_load_mbuf_sg(txq->packet_dma_tag, 346e948693eSPhilip Paeps stmp->map, mbuf, 347e948693eSPhilip Paeps dma_seg, &n_dma_seg, 0); 348e948693eSPhilip Paeps } 349e948693eSPhilip Paeps if (rc != 0) 350e948693eSPhilip Paeps goto reject; 351e948693eSPhilip Paeps 352e948693eSPhilip Paeps /* Make the packet visible to the hardware. */ 353e948693eSPhilip Paeps bus_dmamap_sync(txq->packet_dma_tag, stmp->map, BUS_DMASYNC_PREWRITE); 354e948693eSPhilip Paeps 355e948693eSPhilip Paeps used_map = &stmp->map; 356e948693eSPhilip Paeps 357e948693eSPhilip Paeps if (mbuf->m_pkthdr.csum_flags & CSUM_TSO) { 358e948693eSPhilip Paeps rc = sfxge_tx_queue_tso(txq, mbuf, dma_seg, n_dma_seg); 359e948693eSPhilip Paeps if (rc < 0) 360e948693eSPhilip Paeps goto reject_mapped; 361e948693eSPhilip Paeps stmp = &txq->stmp[rc]; 362e948693eSPhilip Paeps } else { 363e948693eSPhilip Paeps /* Add the mapping to the fragment list, and set flags 364e948693eSPhilip Paeps * for the buffer. 365e948693eSPhilip Paeps */ 366e948693eSPhilip Paeps i = 0; 367e948693eSPhilip Paeps for (;;) { 368e948693eSPhilip Paeps desc = &txq->pend_desc[i]; 369e948693eSPhilip Paeps desc->eb_addr = dma_seg[i].ds_addr; 370e948693eSPhilip Paeps desc->eb_size = dma_seg[i].ds_len; 371e948693eSPhilip Paeps if (i == n_dma_seg - 1) { 372e948693eSPhilip Paeps desc->eb_eop = 1; 373e948693eSPhilip Paeps break; 374e948693eSPhilip Paeps } 375e948693eSPhilip Paeps desc->eb_eop = 0; 376e948693eSPhilip Paeps i++; 377e948693eSPhilip Paeps 378e948693eSPhilip Paeps stmp->flags = 0; 379e948693eSPhilip Paeps if (__predict_false(stmp == 380385b1d8eSGeorge V. Neville-Neil &txq->stmp[txq->ptr_mask])) 381e948693eSPhilip Paeps stmp = &txq->stmp[0]; 382e948693eSPhilip Paeps else 383e948693eSPhilip Paeps stmp++; 384e948693eSPhilip Paeps } 385e948693eSPhilip Paeps txq->n_pend_desc = n_dma_seg; 386e948693eSPhilip Paeps } 387e948693eSPhilip Paeps 388e948693eSPhilip Paeps /* 389e948693eSPhilip Paeps * If the mapping required more than one descriptor 390e948693eSPhilip Paeps * then we need to associate the DMA map with the last 391e948693eSPhilip Paeps * descriptor, not the first. 392e948693eSPhilip Paeps */ 393e948693eSPhilip Paeps if (used_map != &stmp->map) { 394e948693eSPhilip Paeps map = stmp->map; 395e948693eSPhilip Paeps stmp->map = *used_map; 396e948693eSPhilip Paeps *used_map = map; 397e948693eSPhilip Paeps } 398e948693eSPhilip Paeps 399e948693eSPhilip Paeps stmp->u.mbuf = mbuf; 400e948693eSPhilip Paeps stmp->flags = TX_BUF_UNMAP | TX_BUF_MBUF; 401e948693eSPhilip Paeps 402e948693eSPhilip Paeps /* Post the fragment list. */ 403e948693eSPhilip Paeps sfxge_tx_qlist_post(txq); 404e948693eSPhilip Paeps 405b7b0edd1SGeorge V. Neville-Neil return (0); 406e948693eSPhilip Paeps 407e948693eSPhilip Paeps reject_mapped: 408e948693eSPhilip Paeps bus_dmamap_unload(txq->packet_dma_tag, *used_map); 409e948693eSPhilip Paeps reject: 410e948693eSPhilip Paeps /* Drop the packet on the floor. */ 411e948693eSPhilip Paeps m_freem(mbuf); 412e948693eSPhilip Paeps ++txq->drops; 413e948693eSPhilip Paeps 414b7b0edd1SGeorge V. Neville-Neil return (rc); 415e948693eSPhilip Paeps } 416e948693eSPhilip Paeps 417e948693eSPhilip Paeps /* 418e948693eSPhilip Paeps * Drain the deferred packet list into the transmit queue. 419e948693eSPhilip Paeps */ 420e948693eSPhilip Paeps static void 421e948693eSPhilip Paeps sfxge_tx_qdpl_drain(struct sfxge_txq *txq) 422e948693eSPhilip Paeps { 423e948693eSPhilip Paeps struct sfxge_softc *sc; 424e948693eSPhilip Paeps struct sfxge_tx_dpl *stdp; 425e948693eSPhilip Paeps struct mbuf *mbuf, *next; 426e948693eSPhilip Paeps unsigned int count; 42793929f25SAndrew Rybchenko unsigned int non_tcp_count; 428e948693eSPhilip Paeps unsigned int pushed; 429e948693eSPhilip Paeps int rc; 430e948693eSPhilip Paeps 431763cab71SAndrew Rybchenko SFXGE_TXQ_LOCK_ASSERT_OWNED(txq); 432e948693eSPhilip Paeps 433e948693eSPhilip Paeps sc = txq->sc; 434e948693eSPhilip Paeps stdp = &txq->dpl; 435e948693eSPhilip Paeps pushed = txq->added; 436e948693eSPhilip Paeps 43706824d2cSAndrew Rybchenko if (__predict_true(txq->init_state == SFXGE_TXQ_STARTED)) { 438e948693eSPhilip Paeps prefetch_read_many(sc->enp); 439e948693eSPhilip Paeps prefetch_read_many(txq->common); 44006824d2cSAndrew Rybchenko } 441e948693eSPhilip Paeps 442e948693eSPhilip Paeps mbuf = stdp->std_get; 443bc85c897SGeorge V. Neville-Neil count = stdp->std_get_count; 44493929f25SAndrew Rybchenko non_tcp_count = stdp->std_get_non_tcp_count; 44593929f25SAndrew Rybchenko 44693929f25SAndrew Rybchenko if (count > stdp->std_get_hiwat) 44793929f25SAndrew Rybchenko stdp->std_get_hiwat = count; 448e948693eSPhilip Paeps 449e948693eSPhilip Paeps while (count != 0) { 450e948693eSPhilip Paeps KASSERT(mbuf != NULL, ("mbuf == NULL")); 451e948693eSPhilip Paeps 452e948693eSPhilip Paeps next = mbuf->m_nextpkt; 453e948693eSPhilip Paeps mbuf->m_nextpkt = NULL; 454e948693eSPhilip Paeps 455e948693eSPhilip Paeps ETHER_BPF_MTAP(sc->ifnet, mbuf); /* packet capture */ 456e948693eSPhilip Paeps 457e948693eSPhilip Paeps if (next != NULL) 458e948693eSPhilip Paeps prefetch_read_many(next); 459e948693eSPhilip Paeps 460e948693eSPhilip Paeps rc = sfxge_tx_queue_mbuf(txq, mbuf); 461e948693eSPhilip Paeps --count; 46293929f25SAndrew Rybchenko non_tcp_count -= sfxge_is_mbuf_non_tcp(mbuf); 463e948693eSPhilip Paeps mbuf = next; 464e948693eSPhilip Paeps if (rc != 0) 465e948693eSPhilip Paeps continue; 466e948693eSPhilip Paeps 467e948693eSPhilip Paeps if (txq->blocked) 468e948693eSPhilip Paeps break; 469e948693eSPhilip Paeps 470e948693eSPhilip Paeps /* Push the fragments to the hardware in batches. */ 471e948693eSPhilip Paeps if (txq->added - pushed >= SFXGE_TX_BATCH) { 472e948693eSPhilip Paeps efx_tx_qpush(txq->common, txq->added); 473e948693eSPhilip Paeps pushed = txq->added; 474e948693eSPhilip Paeps } 475e948693eSPhilip Paeps } 476e948693eSPhilip Paeps 477e948693eSPhilip Paeps if (count == 0) { 478e948693eSPhilip Paeps KASSERT(mbuf == NULL, ("mbuf != NULL")); 47993929f25SAndrew Rybchenko KASSERT(non_tcp_count == 0, 48093929f25SAndrew Rybchenko ("inconsistent TCP/non-TCP detection")); 481e948693eSPhilip Paeps stdp->std_get = NULL; 482bc85c897SGeorge V. Neville-Neil stdp->std_get_count = 0; 48393929f25SAndrew Rybchenko stdp->std_get_non_tcp_count = 0; 484e948693eSPhilip Paeps stdp->std_getp = &stdp->std_get; 485e948693eSPhilip Paeps } else { 486e948693eSPhilip Paeps stdp->std_get = mbuf; 487bc85c897SGeorge V. Neville-Neil stdp->std_get_count = count; 48893929f25SAndrew Rybchenko stdp->std_get_non_tcp_count = non_tcp_count; 489e948693eSPhilip Paeps } 490e948693eSPhilip Paeps 491e948693eSPhilip Paeps if (txq->added != pushed) 492e948693eSPhilip Paeps efx_tx_qpush(txq->common, txq->added); 493e948693eSPhilip Paeps 494bc85c897SGeorge V. Neville-Neil KASSERT(txq->blocked || stdp->std_get_count == 0, 495e948693eSPhilip Paeps ("queue unblocked but count is non-zero")); 496e948693eSPhilip Paeps } 497e948693eSPhilip Paeps 498e948693eSPhilip Paeps #define SFXGE_TX_QDPL_PENDING(_txq) \ 499e948693eSPhilip Paeps ((_txq)->dpl.std_put != 0) 500e948693eSPhilip Paeps 501e948693eSPhilip Paeps /* 502e948693eSPhilip Paeps * Service the deferred packet list. 503e948693eSPhilip Paeps * 504e948693eSPhilip Paeps * NOTE: drops the txq mutex! 505e948693eSPhilip Paeps */ 5060b28bbdcSAndrew Rybchenko static void 507e948693eSPhilip Paeps sfxge_tx_qdpl_service(struct sfxge_txq *txq) 508e948693eSPhilip Paeps { 509763cab71SAndrew Rybchenko SFXGE_TXQ_LOCK_ASSERT_OWNED(txq); 510e948693eSPhilip Paeps 511e948693eSPhilip Paeps do { 512e948693eSPhilip Paeps if (SFXGE_TX_QDPL_PENDING(txq)) 513e948693eSPhilip Paeps sfxge_tx_qdpl_swizzle(txq); 514e948693eSPhilip Paeps 515e948693eSPhilip Paeps if (!txq->blocked) 516e948693eSPhilip Paeps sfxge_tx_qdpl_drain(txq); 517e948693eSPhilip Paeps 518763cab71SAndrew Rybchenko SFXGE_TXQ_UNLOCK(txq); 519e948693eSPhilip Paeps } while (SFXGE_TX_QDPL_PENDING(txq) && 520763cab71SAndrew Rybchenko SFXGE_TXQ_TRYLOCK(txq)); 521e948693eSPhilip Paeps } 522e948693eSPhilip Paeps 523e948693eSPhilip Paeps /* 524d6e9f736SAndrew Rybchenko * Put a packet on the deferred packet get-list. 525e948693eSPhilip Paeps */ 5260b28bbdcSAndrew Rybchenko static int 527d6e9f736SAndrew Rybchenko sfxge_tx_qdpl_put_locked(struct sfxge_txq *txq, struct mbuf *mbuf) 528e948693eSPhilip Paeps { 529e948693eSPhilip Paeps struct sfxge_tx_dpl *stdp; 530e948693eSPhilip Paeps 531e948693eSPhilip Paeps stdp = &txq->dpl; 532e948693eSPhilip Paeps 533e948693eSPhilip Paeps KASSERT(mbuf->m_nextpkt == NULL, ("mbuf->m_nextpkt != NULL")); 534e948693eSPhilip Paeps 535763cab71SAndrew Rybchenko SFXGE_TXQ_LOCK_ASSERT_OWNED(txq); 536e948693eSPhilip Paeps 53793929f25SAndrew Rybchenko if (stdp->std_get_count >= stdp->std_get_max) { 53893929f25SAndrew Rybchenko txq->get_overflow++; 539c1974e29SGleb Smirnoff return (ENOBUFS); 54093929f25SAndrew Rybchenko } 54193929f25SAndrew Rybchenko if (sfxge_is_mbuf_non_tcp(mbuf)) { 54293929f25SAndrew Rybchenko if (stdp->std_get_non_tcp_count >= 54393929f25SAndrew Rybchenko stdp->std_get_non_tcp_max) { 54493929f25SAndrew Rybchenko txq->get_non_tcp_overflow++; 54593929f25SAndrew Rybchenko return (ENOBUFS); 54693929f25SAndrew Rybchenko } 54793929f25SAndrew Rybchenko stdp->std_get_non_tcp_count++; 54893929f25SAndrew Rybchenko } 549c1974e29SGleb Smirnoff 550e948693eSPhilip Paeps *(stdp->std_getp) = mbuf; 551e948693eSPhilip Paeps stdp->std_getp = &mbuf->m_nextpkt; 552bc85c897SGeorge V. Neville-Neil stdp->std_get_count++; 553d6e9f736SAndrew Rybchenko 554d6e9f736SAndrew Rybchenko return (0); 555d6e9f736SAndrew Rybchenko } 556d6e9f736SAndrew Rybchenko 557d6e9f736SAndrew Rybchenko /* 558d6e9f736SAndrew Rybchenko * Put a packet on the deferred packet put-list. 559d6e9f736SAndrew Rybchenko * 560d6e9f736SAndrew Rybchenko * We overload the csum_data field in the mbuf to keep track of this length 561d6e9f736SAndrew Rybchenko * because there is no cheap alternative to avoid races. 562d6e9f736SAndrew Rybchenko */ 563d6e9f736SAndrew Rybchenko static int 564d6e9f736SAndrew Rybchenko sfxge_tx_qdpl_put_unlocked(struct sfxge_txq *txq, struct mbuf *mbuf) 565d6e9f736SAndrew Rybchenko { 566d6e9f736SAndrew Rybchenko struct sfxge_tx_dpl *stdp; 567e948693eSPhilip Paeps volatile uintptr_t *putp; 568e948693eSPhilip Paeps uintptr_t old; 569e948693eSPhilip Paeps uintptr_t new; 570e948693eSPhilip Paeps unsigned old_len; 571e948693eSPhilip Paeps 572d6e9f736SAndrew Rybchenko KASSERT(mbuf->m_nextpkt == NULL, ("mbuf->m_nextpkt != NULL")); 573d6e9f736SAndrew Rybchenko 574d6e9f736SAndrew Rybchenko SFXGE_TXQ_LOCK_ASSERT_NOTOWNED(txq); 575d6e9f736SAndrew Rybchenko 576d6e9f736SAndrew Rybchenko stdp = &txq->dpl; 577e948693eSPhilip Paeps putp = &stdp->std_put; 578e948693eSPhilip Paeps new = (uintptr_t)mbuf; 579e948693eSPhilip Paeps 580e948693eSPhilip Paeps do { 581e948693eSPhilip Paeps old = *putp; 582b7b0edd1SGeorge V. Neville-Neil if (old != 0) { 583e948693eSPhilip Paeps struct mbuf *mp = (struct mbuf *)old; 584e948693eSPhilip Paeps old_len = mp->m_pkthdr.csum_data; 585e948693eSPhilip Paeps } else 586e948693eSPhilip Paeps old_len = 0; 58793929f25SAndrew Rybchenko if (old_len >= stdp->std_put_max) { 58893929f25SAndrew Rybchenko atomic_add_long(&txq->put_overflow, 1); 589c1974e29SGleb Smirnoff return (ENOBUFS); 59093929f25SAndrew Rybchenko } 591e948693eSPhilip Paeps mbuf->m_pkthdr.csum_data = old_len + 1; 592e948693eSPhilip Paeps mbuf->m_nextpkt = (void *)old; 593fb8ccc78SMarius Strobl } while (atomic_cmpset_ptr(putp, old, new) == 0); 594e948693eSPhilip Paeps 595e948693eSPhilip Paeps return (0); 596e948693eSPhilip Paeps } 597e948693eSPhilip Paeps 598e948693eSPhilip Paeps /* 599e948693eSPhilip Paeps * Called from if_transmit - will try to grab the txq lock and enqueue to the 600c071447aSAndrew Rybchenko * put list if it succeeds, otherwise try to push onto the defer list if space. 601e948693eSPhilip Paeps */ 602e948693eSPhilip Paeps int 603e948693eSPhilip Paeps sfxge_tx_packet_add(struct sfxge_txq *txq, struct mbuf *m) 604e948693eSPhilip Paeps { 605e948693eSPhilip Paeps int rc; 606e948693eSPhilip Paeps 607d7ac87d3SGleb Smirnoff if (!SFXGE_LINK_UP(txq->sc)) { 60893929f25SAndrew Rybchenko atomic_add_long(&txq->netdown_drops, 1); 6090e4ebe6cSAndrew Rybchenko return (ENETDOWN); 610d7ac87d3SGleb Smirnoff } 611d7ac87d3SGleb Smirnoff 612e948693eSPhilip Paeps /* 613e948693eSPhilip Paeps * Try to grab the txq lock. If we are able to get the lock, 614e948693eSPhilip Paeps * the packet will be appended to the "get list" of the deferred 615e948693eSPhilip Paeps * packet list. Otherwise, it will be pushed on the "put list". 616e948693eSPhilip Paeps */ 617deee1de4SAndrew Rybchenko if (SFXGE_TXQ_TRYLOCK(txq)) { 618d6e9f736SAndrew Rybchenko /* First swizzle put-list to get-list to keep order */ 619d6e9f736SAndrew Rybchenko sfxge_tx_qdpl_swizzle(txq); 620d6e9f736SAndrew Rybchenko 621d6e9f736SAndrew Rybchenko rc = sfxge_tx_qdpl_put_locked(txq, m); 622deee1de4SAndrew Rybchenko 623deee1de4SAndrew Rybchenko /* Try to service the list. */ 624deee1de4SAndrew Rybchenko sfxge_tx_qdpl_service(txq); 625deee1de4SAndrew Rybchenko /* Lock has been dropped. */ 626d6e9f736SAndrew Rybchenko } else { 627d6e9f736SAndrew Rybchenko rc = sfxge_tx_qdpl_put_unlocked(txq, m); 628e948693eSPhilip Paeps 629e948693eSPhilip Paeps /* 630e948693eSPhilip Paeps * Try to grab the lock again. 631e948693eSPhilip Paeps * 632d6e9f736SAndrew Rybchenko * If we are able to get the lock, we need to process 633d6e9f736SAndrew Rybchenko * the deferred packet list. If we are not able to get 634d6e9f736SAndrew Rybchenko * the lock, another thread is processing the list. 635e948693eSPhilip Paeps */ 636f080384cSAndrew Rybchenko if ((rc == 0) && SFXGE_TXQ_TRYLOCK(txq)) { 637e948693eSPhilip Paeps sfxge_tx_qdpl_service(txq); 638e948693eSPhilip Paeps /* Lock has been dropped. */ 639e948693eSPhilip Paeps } 640deee1de4SAndrew Rybchenko } 641deee1de4SAndrew Rybchenko 642deee1de4SAndrew Rybchenko SFXGE_TXQ_LOCK_ASSERT_NOTOWNED(txq); 643e948693eSPhilip Paeps 644f080384cSAndrew Rybchenko return (rc); 645e948693eSPhilip Paeps } 646e948693eSPhilip Paeps 647e948693eSPhilip Paeps static void 648e948693eSPhilip Paeps sfxge_tx_qdpl_flush(struct sfxge_txq *txq) 649e948693eSPhilip Paeps { 650e948693eSPhilip Paeps struct sfxge_tx_dpl *stdp = &txq->dpl; 651e948693eSPhilip Paeps struct mbuf *mbuf, *next; 652e948693eSPhilip Paeps 653763cab71SAndrew Rybchenko SFXGE_TXQ_LOCK(txq); 654e948693eSPhilip Paeps 655e948693eSPhilip Paeps sfxge_tx_qdpl_swizzle(txq); 656e948693eSPhilip Paeps for (mbuf = stdp->std_get; mbuf != NULL; mbuf = next) { 657e948693eSPhilip Paeps next = mbuf->m_nextpkt; 658e948693eSPhilip Paeps m_freem(mbuf); 659e948693eSPhilip Paeps } 660e948693eSPhilip Paeps stdp->std_get = NULL; 661bc85c897SGeorge V. Neville-Neil stdp->std_get_count = 0; 66293929f25SAndrew Rybchenko stdp->std_get_non_tcp_count = 0; 663e948693eSPhilip Paeps stdp->std_getp = &stdp->std_get; 664e948693eSPhilip Paeps 665763cab71SAndrew Rybchenko SFXGE_TXQ_UNLOCK(txq); 666e948693eSPhilip Paeps } 667e948693eSPhilip Paeps 668e948693eSPhilip Paeps void 669e948693eSPhilip Paeps sfxge_if_qflush(struct ifnet *ifp) 670e948693eSPhilip Paeps { 671e948693eSPhilip Paeps struct sfxge_softc *sc; 672cb552e88SAndrew Rybchenko unsigned int i; 673e948693eSPhilip Paeps 674e948693eSPhilip Paeps sc = ifp->if_softc; 675e948693eSPhilip Paeps 676e2b05fe2SAndrew Rybchenko for (i = 0; i < sc->txq_count; i++) 677e948693eSPhilip Paeps sfxge_tx_qdpl_flush(sc->txq[i]); 678e948693eSPhilip Paeps } 679e948693eSPhilip Paeps 680e948693eSPhilip Paeps /* 681e948693eSPhilip Paeps * TX start -- called by the stack. 682e948693eSPhilip Paeps */ 683e948693eSPhilip Paeps int 684e948693eSPhilip Paeps sfxge_if_transmit(struct ifnet *ifp, struct mbuf *m) 685e948693eSPhilip Paeps { 686e948693eSPhilip Paeps struct sfxge_softc *sc; 687e948693eSPhilip Paeps struct sfxge_txq *txq; 688e948693eSPhilip Paeps int rc; 689e948693eSPhilip Paeps 690e948693eSPhilip Paeps sc = (struct sfxge_softc *)ifp->if_softc; 691e948693eSPhilip Paeps 69287581ab8SAndrew Rybchenko /* 69387581ab8SAndrew Rybchenko * Transmit may be called when interface is up from the kernel 69487581ab8SAndrew Rybchenko * point of view, but not yet up (in progress) from the driver 69587581ab8SAndrew Rybchenko * point of view. I.e. link aggregation bring up. 69687581ab8SAndrew Rybchenko * Transmit may be called when interface is up from the driver 69787581ab8SAndrew Rybchenko * point of view, but already down from the kernel point of 69887581ab8SAndrew Rybchenko * view. I.e. Rx when interface shutdown is in progress. 69987581ab8SAndrew Rybchenko */ 70087581ab8SAndrew Rybchenko KASSERT((ifp->if_flags & IFF_UP) || (sc->if_flags & IFF_UP), 70187581ab8SAndrew Rybchenko ("interface not up")); 702e948693eSPhilip Paeps 703e948693eSPhilip Paeps /* Pick the desired transmit queue. */ 704db7e53aaSAndrew Rybchenko if (m->m_pkthdr.csum_flags & 705db7e53aaSAndrew Rybchenko (CSUM_DELAY_DATA | CSUM_TCP_IPV6 | CSUM_UDP_IPV6 | CSUM_TSO)) { 706e948693eSPhilip Paeps int index = 0; 707e948693eSPhilip Paeps 708c2529042SHans Petter Selasky /* check if flowid is set */ 709c2529042SHans Petter Selasky if (M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) { 710e948693eSPhilip Paeps uint32_t hash = m->m_pkthdr.flowid; 711e948693eSPhilip Paeps 712e948693eSPhilip Paeps index = sc->rx_indir_table[hash % SFXGE_RX_SCALE_MAX]; 713e948693eSPhilip Paeps } 714e948693eSPhilip Paeps txq = sc->txq[SFXGE_TXQ_IP_TCP_UDP_CKSUM + index]; 715e948693eSPhilip Paeps } else if (m->m_pkthdr.csum_flags & CSUM_DELAY_IP) { 716e948693eSPhilip Paeps txq = sc->txq[SFXGE_TXQ_IP_CKSUM]; 717e948693eSPhilip Paeps } else { 718e948693eSPhilip Paeps txq = sc->txq[SFXGE_TXQ_NON_CKSUM]; 719e948693eSPhilip Paeps } 720e948693eSPhilip Paeps 721e948693eSPhilip Paeps rc = sfxge_tx_packet_add(txq, m); 7220e4ebe6cSAndrew Rybchenko if (rc != 0) 7230e4ebe6cSAndrew Rybchenko m_freem(m); 724e948693eSPhilip Paeps 725e948693eSPhilip Paeps return (rc); 726e948693eSPhilip Paeps } 727e948693eSPhilip Paeps 728e948693eSPhilip Paeps /* 729e948693eSPhilip Paeps * Software "TSO". Not quite as good as doing it in hardware, but 730e948693eSPhilip Paeps * still faster than segmenting in the stack. 731e948693eSPhilip Paeps */ 732e948693eSPhilip Paeps 733e948693eSPhilip Paeps struct sfxge_tso_state { 734e948693eSPhilip Paeps /* Output position */ 735e948693eSPhilip Paeps unsigned out_len; /* Remaining length in current segment */ 736e948693eSPhilip Paeps unsigned seqnum; /* Current sequence number */ 737e948693eSPhilip Paeps unsigned packet_space; /* Remaining space in current packet */ 738e948693eSPhilip Paeps 739e948693eSPhilip Paeps /* Input position */ 740e948693eSPhilip Paeps uint64_t dma_addr; /* DMA address of current position */ 741e948693eSPhilip Paeps unsigned in_len; /* Remaining length in current mbuf */ 742e948693eSPhilip Paeps 743e948693eSPhilip Paeps const struct mbuf *mbuf; /* Input mbuf (head of chain) */ 744e948693eSPhilip Paeps u_short protocol; /* Network protocol (after VLAN decap) */ 745e948693eSPhilip Paeps ssize_t nh_off; /* Offset of network header */ 746e948693eSPhilip Paeps ssize_t tcph_off; /* Offset of TCP header */ 747e948693eSPhilip Paeps unsigned header_len; /* Number of bytes of header */ 748d0f73877SAndrew Rybchenko unsigned seg_size; /* TCP segment size */ 749e948693eSPhilip Paeps }; 750e948693eSPhilip Paeps 7510b28bbdcSAndrew Rybchenko static const struct ip *tso_iph(const struct sfxge_tso_state *tso) 752e948693eSPhilip Paeps { 753e948693eSPhilip Paeps KASSERT(tso->protocol == htons(ETHERTYPE_IP), 754e948693eSPhilip Paeps ("tso_iph() in non-IPv4 state")); 755e948693eSPhilip Paeps return (const struct ip *)(tso->mbuf->m_data + tso->nh_off); 756e948693eSPhilip Paeps } 7570b28bbdcSAndrew Rybchenko static __unused const struct ip6_hdr *tso_ip6h(const struct sfxge_tso_state *tso) 758e948693eSPhilip Paeps { 759e948693eSPhilip Paeps KASSERT(tso->protocol == htons(ETHERTYPE_IPV6), 760e948693eSPhilip Paeps ("tso_ip6h() in non-IPv6 state")); 761e948693eSPhilip Paeps return (const struct ip6_hdr *)(tso->mbuf->m_data + tso->nh_off); 762e948693eSPhilip Paeps } 7630b28bbdcSAndrew Rybchenko static const struct tcphdr *tso_tcph(const struct sfxge_tso_state *tso) 764e948693eSPhilip Paeps { 765e948693eSPhilip Paeps return (const struct tcphdr *)(tso->mbuf->m_data + tso->tcph_off); 766e948693eSPhilip Paeps } 767e948693eSPhilip Paeps 768e948693eSPhilip Paeps /* Size of preallocated TSO header buffers. Larger blocks must be 769e948693eSPhilip Paeps * allocated from the heap. 770e948693eSPhilip Paeps */ 771e948693eSPhilip Paeps #define TSOH_STD_SIZE 128 772e948693eSPhilip Paeps 773e948693eSPhilip Paeps /* At most half the descriptors in the queue at any time will refer to 774e948693eSPhilip Paeps * a TSO header buffer, since they must always be followed by a 775e948693eSPhilip Paeps * payload descriptor referring to an mbuf. 776e948693eSPhilip Paeps */ 777385b1d8eSGeorge V. Neville-Neil #define TSOH_COUNT(_txq_entries) ((_txq_entries) / 2u) 778e948693eSPhilip Paeps #define TSOH_PER_PAGE (PAGE_SIZE / TSOH_STD_SIZE) 779385b1d8eSGeorge V. Neville-Neil #define TSOH_PAGE_COUNT(_txq_entries) \ 780385b1d8eSGeorge V. Neville-Neil ((TSOH_COUNT(_txq_entries) + TSOH_PER_PAGE - 1) / TSOH_PER_PAGE) 781e948693eSPhilip Paeps 782e948693eSPhilip Paeps static int tso_init(struct sfxge_txq *txq) 783e948693eSPhilip Paeps { 784e948693eSPhilip Paeps struct sfxge_softc *sc = txq->sc; 785385b1d8eSGeorge V. Neville-Neil unsigned int tsoh_page_count = TSOH_PAGE_COUNT(sc->txq_entries); 786e948693eSPhilip Paeps int i, rc; 787e948693eSPhilip Paeps 788e948693eSPhilip Paeps /* Allocate TSO header buffers */ 789385b1d8eSGeorge V. Neville-Neil txq->tsoh_buffer = malloc(tsoh_page_count * sizeof(txq->tsoh_buffer[0]), 790e948693eSPhilip Paeps M_SFXGE, M_WAITOK); 791e948693eSPhilip Paeps 792385b1d8eSGeorge V. Neville-Neil for (i = 0; i < tsoh_page_count; i++) { 793e948693eSPhilip Paeps rc = sfxge_dma_alloc(sc, PAGE_SIZE, &txq->tsoh_buffer[i]); 794b7b0edd1SGeorge V. Neville-Neil if (rc != 0) 795e948693eSPhilip Paeps goto fail; 796e948693eSPhilip Paeps } 797e948693eSPhilip Paeps 798b7b0edd1SGeorge V. Neville-Neil return (0); 799e948693eSPhilip Paeps 800e948693eSPhilip Paeps fail: 801e948693eSPhilip Paeps while (i-- > 0) 802e948693eSPhilip Paeps sfxge_dma_free(&txq->tsoh_buffer[i]); 803e948693eSPhilip Paeps free(txq->tsoh_buffer, M_SFXGE); 804e948693eSPhilip Paeps txq->tsoh_buffer = NULL; 805b7b0edd1SGeorge V. Neville-Neil return (rc); 806e948693eSPhilip Paeps } 807e948693eSPhilip Paeps 808e948693eSPhilip Paeps static void tso_fini(struct sfxge_txq *txq) 809e948693eSPhilip Paeps { 810e948693eSPhilip Paeps int i; 811e948693eSPhilip Paeps 812b7b0edd1SGeorge V. Neville-Neil if (txq->tsoh_buffer != NULL) { 813385b1d8eSGeorge V. Neville-Neil for (i = 0; i < TSOH_PAGE_COUNT(txq->sc->txq_entries); i++) 814e948693eSPhilip Paeps sfxge_dma_free(&txq->tsoh_buffer[i]); 815e948693eSPhilip Paeps free(txq->tsoh_buffer, M_SFXGE); 816e948693eSPhilip Paeps } 817e948693eSPhilip Paeps } 818e948693eSPhilip Paeps 819e948693eSPhilip Paeps static void tso_start(struct sfxge_tso_state *tso, struct mbuf *mbuf) 820e948693eSPhilip Paeps { 821e948693eSPhilip Paeps struct ether_header *eh = mtod(mbuf, struct ether_header *); 822b2c43c38SAndrew Rybchenko const struct tcphdr *th; 823b2c43c38SAndrew Rybchenko struct tcphdr th_copy; 824e948693eSPhilip Paeps 825e948693eSPhilip Paeps tso->mbuf = mbuf; 826e948693eSPhilip Paeps 827e948693eSPhilip Paeps /* Find network protocol and header */ 828e948693eSPhilip Paeps tso->protocol = eh->ether_type; 829e948693eSPhilip Paeps if (tso->protocol == htons(ETHERTYPE_VLAN)) { 830e948693eSPhilip Paeps struct ether_vlan_header *veh = 831e948693eSPhilip Paeps mtod(mbuf, struct ether_vlan_header *); 832e948693eSPhilip Paeps tso->protocol = veh->evl_proto; 833e948693eSPhilip Paeps tso->nh_off = sizeof(*veh); 834e948693eSPhilip Paeps } else { 835e948693eSPhilip Paeps tso->nh_off = sizeof(*eh); 836e948693eSPhilip Paeps } 837e948693eSPhilip Paeps 838e948693eSPhilip Paeps /* Find TCP header */ 839e948693eSPhilip Paeps if (tso->protocol == htons(ETHERTYPE_IP)) { 840e948693eSPhilip Paeps KASSERT(tso_iph(tso)->ip_p == IPPROTO_TCP, 841e948693eSPhilip Paeps ("TSO required on non-TCP packet")); 842e948693eSPhilip Paeps tso->tcph_off = tso->nh_off + 4 * tso_iph(tso)->ip_hl; 843e948693eSPhilip Paeps } else { 844e948693eSPhilip Paeps KASSERT(tso->protocol == htons(ETHERTYPE_IPV6), 845e948693eSPhilip Paeps ("TSO required on non-IP packet")); 846e948693eSPhilip Paeps KASSERT(tso_ip6h(tso)->ip6_nxt == IPPROTO_TCP, 847e948693eSPhilip Paeps ("TSO required on non-TCP packet")); 848e948693eSPhilip Paeps tso->tcph_off = tso->nh_off + sizeof(struct ip6_hdr); 849e948693eSPhilip Paeps } 850e948693eSPhilip Paeps 851b2c43c38SAndrew Rybchenko KASSERT(mbuf->m_len >= tso->tcph_off, 852b2c43c38SAndrew Rybchenko ("network header is fragmented in mbuf")); 853b2c43c38SAndrew Rybchenko /* We need TCP header including flags (window is the next) */ 854b2c43c38SAndrew Rybchenko if (mbuf->m_len < tso->tcph_off + offsetof(struct tcphdr, th_win)) { 855b2c43c38SAndrew Rybchenko m_copydata(tso->mbuf, tso->tcph_off, sizeof(th_copy), 856b2c43c38SAndrew Rybchenko (caddr_t)&th_copy); 857b2c43c38SAndrew Rybchenko th = &th_copy; 858b2c43c38SAndrew Rybchenko } else { 859b2c43c38SAndrew Rybchenko th = tso_tcph(tso); 860b2c43c38SAndrew Rybchenko } 861b2c43c38SAndrew Rybchenko 862b2c43c38SAndrew Rybchenko tso->header_len = tso->tcph_off + 4 * th->th_off; 863d0f73877SAndrew Rybchenko tso->seg_size = mbuf->m_pkthdr.tso_segsz; 864e948693eSPhilip Paeps 865b2c43c38SAndrew Rybchenko tso->seqnum = ntohl(th->th_seq); 866e948693eSPhilip Paeps 867e948693eSPhilip Paeps /* These flags must not be duplicated */ 868b2c43c38SAndrew Rybchenko KASSERT(!(th->th_flags & (TH_URG | TH_SYN | TH_RST)), 869e948693eSPhilip Paeps ("incompatible TCP flag on TSO packet")); 870e948693eSPhilip Paeps 871e948693eSPhilip Paeps tso->out_len = mbuf->m_pkthdr.len - tso->header_len; 872e948693eSPhilip Paeps } 873e948693eSPhilip Paeps 874e948693eSPhilip Paeps /* 875e948693eSPhilip Paeps * tso_fill_packet_with_fragment - form descriptors for the current fragment 876e948693eSPhilip Paeps * 877e948693eSPhilip Paeps * Form descriptors for the current fragment, until we reach the end 878e948693eSPhilip Paeps * of fragment or end-of-packet. Return 0 on success, 1 if not enough 879e948693eSPhilip Paeps * space. 880e948693eSPhilip Paeps */ 881e948693eSPhilip Paeps static void tso_fill_packet_with_fragment(struct sfxge_txq *txq, 882e948693eSPhilip Paeps struct sfxge_tso_state *tso) 883e948693eSPhilip Paeps { 884e948693eSPhilip Paeps efx_buffer_t *desc; 885e948693eSPhilip Paeps int n; 886e948693eSPhilip Paeps 887e948693eSPhilip Paeps if (tso->in_len == 0 || tso->packet_space == 0) 888e948693eSPhilip Paeps return; 889e948693eSPhilip Paeps 890e948693eSPhilip Paeps KASSERT(tso->in_len > 0, ("TSO input length went negative")); 891e948693eSPhilip Paeps KASSERT(tso->packet_space > 0, ("TSO packet space went negative")); 892e948693eSPhilip Paeps 893e948693eSPhilip Paeps n = min(tso->in_len, tso->packet_space); 894e948693eSPhilip Paeps 895e948693eSPhilip Paeps tso->packet_space -= n; 896e948693eSPhilip Paeps tso->out_len -= n; 897e948693eSPhilip Paeps tso->in_len -= n; 898e948693eSPhilip Paeps 899e948693eSPhilip Paeps desc = &txq->pend_desc[txq->n_pend_desc++]; 900e948693eSPhilip Paeps desc->eb_addr = tso->dma_addr; 901e948693eSPhilip Paeps desc->eb_size = n; 902e948693eSPhilip Paeps desc->eb_eop = tso->out_len == 0 || tso->packet_space == 0; 903e948693eSPhilip Paeps 904e948693eSPhilip Paeps tso->dma_addr += n; 905e948693eSPhilip Paeps } 906e948693eSPhilip Paeps 907e948693eSPhilip Paeps /* Callback from bus_dmamap_load() for long TSO headers. */ 908e948693eSPhilip Paeps static void tso_map_long_header(void *dma_addr_ret, 909e948693eSPhilip Paeps bus_dma_segment_t *segs, int nseg, 910e948693eSPhilip Paeps int error) 911e948693eSPhilip Paeps { 912e948693eSPhilip Paeps *(uint64_t *)dma_addr_ret = ((__predict_true(error == 0) && 913e948693eSPhilip Paeps __predict_true(nseg == 1)) ? 914e948693eSPhilip Paeps segs->ds_addr : 0); 915e948693eSPhilip Paeps } 916e948693eSPhilip Paeps 917e948693eSPhilip Paeps /* 918e948693eSPhilip Paeps * tso_start_new_packet - generate a new header and prepare for the new packet 919e948693eSPhilip Paeps * 920e948693eSPhilip Paeps * Generate a new header and prepare for the new packet. Return 0 on 921e948693eSPhilip Paeps * success, or an error code if failed to alloc header. 922e948693eSPhilip Paeps */ 923e948693eSPhilip Paeps static int tso_start_new_packet(struct sfxge_txq *txq, 924e948693eSPhilip Paeps struct sfxge_tso_state *tso, 925e948693eSPhilip Paeps unsigned int id) 926e948693eSPhilip Paeps { 927e948693eSPhilip Paeps struct sfxge_tx_mapping *stmp = &txq->stmp[id]; 928e948693eSPhilip Paeps struct tcphdr *tsoh_th; 929e948693eSPhilip Paeps unsigned ip_length; 930e948693eSPhilip Paeps caddr_t header; 931e948693eSPhilip Paeps uint64_t dma_addr; 932e948693eSPhilip Paeps bus_dmamap_t map; 933e948693eSPhilip Paeps efx_buffer_t *desc; 934e948693eSPhilip Paeps int rc; 935e948693eSPhilip Paeps 936e948693eSPhilip Paeps /* Allocate a DMA-mapped header buffer. */ 937e948693eSPhilip Paeps if (__predict_true(tso->header_len <= TSOH_STD_SIZE)) { 938e948693eSPhilip Paeps unsigned int page_index = (id / 2) / TSOH_PER_PAGE; 939e948693eSPhilip Paeps unsigned int buf_index = (id / 2) % TSOH_PER_PAGE; 940e948693eSPhilip Paeps 941e948693eSPhilip Paeps header = (txq->tsoh_buffer[page_index].esm_base + 942e948693eSPhilip Paeps buf_index * TSOH_STD_SIZE); 943e948693eSPhilip Paeps dma_addr = (txq->tsoh_buffer[page_index].esm_addr + 944e948693eSPhilip Paeps buf_index * TSOH_STD_SIZE); 945e948693eSPhilip Paeps map = txq->tsoh_buffer[page_index].esm_map; 946e948693eSPhilip Paeps 947e948693eSPhilip Paeps stmp->flags = 0; 948e948693eSPhilip Paeps } else { 949e948693eSPhilip Paeps /* We cannot use bus_dmamem_alloc() as that may sleep */ 950e948693eSPhilip Paeps header = malloc(tso->header_len, M_SFXGE, M_NOWAIT); 951e948693eSPhilip Paeps if (__predict_false(!header)) 952b7b0edd1SGeorge V. Neville-Neil return (ENOMEM); 953e948693eSPhilip Paeps rc = bus_dmamap_load(txq->packet_dma_tag, stmp->map, 954e948693eSPhilip Paeps header, tso->header_len, 955e948693eSPhilip Paeps tso_map_long_header, &dma_addr, 956e948693eSPhilip Paeps BUS_DMA_NOWAIT); 957e948693eSPhilip Paeps if (__predict_false(dma_addr == 0)) { 958e948693eSPhilip Paeps if (rc == 0) { 959e948693eSPhilip Paeps /* Succeeded but got >1 segment */ 960e948693eSPhilip Paeps bus_dmamap_unload(txq->packet_dma_tag, 961e948693eSPhilip Paeps stmp->map); 962e948693eSPhilip Paeps rc = EINVAL; 963e948693eSPhilip Paeps } 964e948693eSPhilip Paeps free(header, M_SFXGE); 965b7b0edd1SGeorge V. Neville-Neil return (rc); 966e948693eSPhilip Paeps } 967e948693eSPhilip Paeps map = stmp->map; 968e948693eSPhilip Paeps 969e948693eSPhilip Paeps txq->tso_long_headers++; 970e948693eSPhilip Paeps stmp->u.heap_buf = header; 971e948693eSPhilip Paeps stmp->flags = TX_BUF_UNMAP; 972e948693eSPhilip Paeps } 973e948693eSPhilip Paeps 974e948693eSPhilip Paeps tsoh_th = (struct tcphdr *)(header + tso->tcph_off); 975e948693eSPhilip Paeps 976e948693eSPhilip Paeps /* Copy and update the headers. */ 977a35485aaSAndrew Rybchenko m_copydata(tso->mbuf, 0, tso->header_len, header); 978e948693eSPhilip Paeps 979e948693eSPhilip Paeps tsoh_th->th_seq = htonl(tso->seqnum); 980d0f73877SAndrew Rybchenko tso->seqnum += tso->seg_size; 981d0f73877SAndrew Rybchenko if (tso->out_len > tso->seg_size) { 982e948693eSPhilip Paeps /* This packet will not finish the TSO burst. */ 983d0f73877SAndrew Rybchenko ip_length = tso->header_len - tso->nh_off + tso->seg_size; 984e948693eSPhilip Paeps tsoh_th->th_flags &= ~(TH_FIN | TH_PUSH); 985e948693eSPhilip Paeps } else { 986e948693eSPhilip Paeps /* This packet will be the last in the TSO burst. */ 987e948693eSPhilip Paeps ip_length = tso->header_len - tso->nh_off + tso->out_len; 988e948693eSPhilip Paeps } 989e948693eSPhilip Paeps 990e948693eSPhilip Paeps if (tso->protocol == htons(ETHERTYPE_IP)) { 991e948693eSPhilip Paeps struct ip *tsoh_iph = (struct ip *)(header + tso->nh_off); 992e948693eSPhilip Paeps tsoh_iph->ip_len = htons(ip_length); 993e948693eSPhilip Paeps /* XXX We should increment ip_id, but FreeBSD doesn't 994e948693eSPhilip Paeps * currently allocate extra IDs for multiple segments. 995e948693eSPhilip Paeps */ 996e948693eSPhilip Paeps } else { 997e948693eSPhilip Paeps struct ip6_hdr *tsoh_iph = 998e948693eSPhilip Paeps (struct ip6_hdr *)(header + tso->nh_off); 999e948693eSPhilip Paeps tsoh_iph->ip6_plen = htons(ip_length - sizeof(*tsoh_iph)); 1000e948693eSPhilip Paeps } 1001e948693eSPhilip Paeps 1002e948693eSPhilip Paeps /* Make the header visible to the hardware. */ 1003e948693eSPhilip Paeps bus_dmamap_sync(txq->packet_dma_tag, map, BUS_DMASYNC_PREWRITE); 1004e948693eSPhilip Paeps 1005d0f73877SAndrew Rybchenko tso->packet_space = tso->seg_size; 1006e948693eSPhilip Paeps txq->tso_packets++; 1007e948693eSPhilip Paeps 1008e948693eSPhilip Paeps /* Form a descriptor for this header. */ 1009e948693eSPhilip Paeps desc = &txq->pend_desc[txq->n_pend_desc++]; 1010e948693eSPhilip Paeps desc->eb_addr = dma_addr; 1011e948693eSPhilip Paeps desc->eb_size = tso->header_len; 1012e948693eSPhilip Paeps desc->eb_eop = 0; 1013e948693eSPhilip Paeps 1014b7b0edd1SGeorge V. Neville-Neil return (0); 1015e948693eSPhilip Paeps } 1016e948693eSPhilip Paeps 1017e948693eSPhilip Paeps static int 1018e948693eSPhilip Paeps sfxge_tx_queue_tso(struct sfxge_txq *txq, struct mbuf *mbuf, 1019e948693eSPhilip Paeps const bus_dma_segment_t *dma_seg, int n_dma_seg) 1020e948693eSPhilip Paeps { 1021e948693eSPhilip Paeps struct sfxge_tso_state tso; 1022e948693eSPhilip Paeps unsigned int id, next_id; 1023a35485aaSAndrew Rybchenko unsigned skipped = 0; 1024e948693eSPhilip Paeps 1025e948693eSPhilip Paeps tso_start(&tso, mbuf); 1026e948693eSPhilip Paeps 1027a35485aaSAndrew Rybchenko while (dma_seg->ds_len + skipped <= tso.header_len) { 1028a35485aaSAndrew Rybchenko skipped += dma_seg->ds_len; 1029e948693eSPhilip Paeps --n_dma_seg; 1030e948693eSPhilip Paeps KASSERT(n_dma_seg, ("no payload found in TSO packet")); 1031e948693eSPhilip Paeps ++dma_seg; 1032e948693eSPhilip Paeps } 1033cfaf34ffSAndrew Rybchenko tso.in_len = dma_seg->ds_len - (tso.header_len - skipped); 1034a35485aaSAndrew Rybchenko tso.dma_addr = dma_seg->ds_addr + (tso.header_len - skipped); 1035e948693eSPhilip Paeps 1036385b1d8eSGeorge V. Neville-Neil id = txq->added & txq->ptr_mask; 1037e948693eSPhilip Paeps if (__predict_false(tso_start_new_packet(txq, &tso, id))) 1038385b1d8eSGeorge V. Neville-Neil return (-1); 1039e948693eSPhilip Paeps 1040e948693eSPhilip Paeps while (1) { 1041385b1d8eSGeorge V. Neville-Neil id = (id + 1) & txq->ptr_mask; 1042e948693eSPhilip Paeps tso_fill_packet_with_fragment(txq, &tso); 1043e948693eSPhilip Paeps 1044e948693eSPhilip Paeps /* Move onto the next fragment? */ 1045e948693eSPhilip Paeps if (tso.in_len == 0) { 1046e948693eSPhilip Paeps --n_dma_seg; 1047e948693eSPhilip Paeps if (n_dma_seg == 0) 1048e948693eSPhilip Paeps break; 1049e948693eSPhilip Paeps ++dma_seg; 1050e948693eSPhilip Paeps tso.in_len = dma_seg->ds_len; 1051e948693eSPhilip Paeps tso.dma_addr = dma_seg->ds_addr; 1052e948693eSPhilip Paeps } 1053e948693eSPhilip Paeps 1054e948693eSPhilip Paeps /* End of packet? */ 1055e948693eSPhilip Paeps if (tso.packet_space == 0) { 1056e948693eSPhilip Paeps /* If the queue is now full due to tiny MSS, 1057e948693eSPhilip Paeps * or we can't create another header, discard 1058e948693eSPhilip Paeps * the remainder of the input mbuf but do not 1059e948693eSPhilip Paeps * roll back the work we have done. 1060e948693eSPhilip Paeps */ 10614d0b294bSAndrew Rybchenko if (txq->n_pend_desc + 1 /* header */ + n_dma_seg > 10624d0b294bSAndrew Rybchenko SFXGE_TSO_MAX_DESC) { 1063e1a3d10eSAndrew Rybchenko txq->tso_pdrop_too_many++; 1064e948693eSPhilip Paeps break; 1065e1a3d10eSAndrew Rybchenko } 1066385b1d8eSGeorge V. Neville-Neil next_id = (id + 1) & txq->ptr_mask; 1067e948693eSPhilip Paeps if (__predict_false(tso_start_new_packet(txq, &tso, 1068e1a3d10eSAndrew Rybchenko next_id))) { 1069e1a3d10eSAndrew Rybchenko txq->tso_pdrop_no_rsrc++; 1070e948693eSPhilip Paeps break; 1071e1a3d10eSAndrew Rybchenko } 1072e948693eSPhilip Paeps id = next_id; 1073e948693eSPhilip Paeps } 1074e948693eSPhilip Paeps } 1075e948693eSPhilip Paeps 1076e948693eSPhilip Paeps txq->tso_bursts++; 1077b7b0edd1SGeorge V. Neville-Neil return (id); 1078e948693eSPhilip Paeps } 1079e948693eSPhilip Paeps 1080e948693eSPhilip Paeps static void 1081e948693eSPhilip Paeps sfxge_tx_qunblock(struct sfxge_txq *txq) 1082e948693eSPhilip Paeps { 1083e948693eSPhilip Paeps struct sfxge_softc *sc; 1084e948693eSPhilip Paeps struct sfxge_evq *evq; 1085e948693eSPhilip Paeps 1086e948693eSPhilip Paeps sc = txq->sc; 1087e948693eSPhilip Paeps evq = sc->evq[txq->evq_index]; 1088e948693eSPhilip Paeps 1089763cab71SAndrew Rybchenko SFXGE_EVQ_LOCK_ASSERT_OWNED(evq); 1090e948693eSPhilip Paeps 1091851128b8SAndrew Rybchenko if (__predict_false(txq->init_state != SFXGE_TXQ_STARTED)) 1092e948693eSPhilip Paeps return; 1093e948693eSPhilip Paeps 1094763cab71SAndrew Rybchenko SFXGE_TXQ_LOCK(txq); 1095e948693eSPhilip Paeps 1096e948693eSPhilip Paeps if (txq->blocked) { 1097e948693eSPhilip Paeps unsigned int level; 1098e948693eSPhilip Paeps 1099e948693eSPhilip Paeps level = txq->added - txq->completed; 11006d73545eSAndrew Rybchenko if (level <= SFXGE_TXQ_UNBLOCK_LEVEL(txq->entries)) { 11016d73545eSAndrew Rybchenko /* reaped must be in sync with blocked */ 11026d73545eSAndrew Rybchenko sfxge_tx_qreap(txq); 1103e948693eSPhilip Paeps txq->blocked = 0; 1104e948693eSPhilip Paeps } 11056d73545eSAndrew Rybchenko } 1106e948693eSPhilip Paeps 1107e948693eSPhilip Paeps sfxge_tx_qdpl_service(txq); 1108e948693eSPhilip Paeps /* note: lock has been dropped */ 1109e948693eSPhilip Paeps } 1110e948693eSPhilip Paeps 1111e948693eSPhilip Paeps void 1112e948693eSPhilip Paeps sfxge_tx_qflush_done(struct sfxge_txq *txq) 1113e948693eSPhilip Paeps { 1114e948693eSPhilip Paeps 1115e948693eSPhilip Paeps txq->flush_state = SFXGE_FLUSH_DONE; 1116e948693eSPhilip Paeps } 1117e948693eSPhilip Paeps 1118e948693eSPhilip Paeps static void 1119e948693eSPhilip Paeps sfxge_tx_qstop(struct sfxge_softc *sc, unsigned int index) 1120e948693eSPhilip Paeps { 1121e948693eSPhilip Paeps struct sfxge_txq *txq; 1122e948693eSPhilip Paeps struct sfxge_evq *evq; 1123e948693eSPhilip Paeps unsigned int count; 1124e948693eSPhilip Paeps 1125e948693eSPhilip Paeps txq = sc->txq[index]; 1126e948693eSPhilip Paeps evq = sc->evq[txq->evq_index]; 1127e948693eSPhilip Paeps 1128763cab71SAndrew Rybchenko SFXGE_TXQ_LOCK(txq); 1129e948693eSPhilip Paeps 1130e948693eSPhilip Paeps KASSERT(txq->init_state == SFXGE_TXQ_STARTED, 1131e948693eSPhilip Paeps ("txq->init_state != SFXGE_TXQ_STARTED")); 1132e948693eSPhilip Paeps 1133e948693eSPhilip Paeps txq->init_state = SFXGE_TXQ_INITIALIZED; 1134e948693eSPhilip Paeps txq->flush_state = SFXGE_FLUSH_PENDING; 1135e948693eSPhilip Paeps 1136e948693eSPhilip Paeps /* Flush the transmit queue. */ 1137e948693eSPhilip Paeps efx_tx_qflush(txq->common); 1138e948693eSPhilip Paeps 1139763cab71SAndrew Rybchenko SFXGE_TXQ_UNLOCK(txq); 1140e948693eSPhilip Paeps 1141e948693eSPhilip Paeps count = 0; 1142e948693eSPhilip Paeps do { 1143e948693eSPhilip Paeps /* Spin for 100ms. */ 1144e948693eSPhilip Paeps DELAY(100000); 1145e948693eSPhilip Paeps 1146e948693eSPhilip Paeps if (txq->flush_state != SFXGE_FLUSH_PENDING) 1147e948693eSPhilip Paeps break; 1148e948693eSPhilip Paeps } while (++count < 20); 1149e948693eSPhilip Paeps 1150763cab71SAndrew Rybchenko SFXGE_EVQ_LOCK(evq); 1151763cab71SAndrew Rybchenko SFXGE_TXQ_LOCK(txq); 1152e948693eSPhilip Paeps 1153e948693eSPhilip Paeps KASSERT(txq->flush_state != SFXGE_FLUSH_FAILED, 1154e948693eSPhilip Paeps ("txq->flush_state == SFXGE_FLUSH_FAILED")); 1155e948693eSPhilip Paeps 1156e948693eSPhilip Paeps txq->flush_state = SFXGE_FLUSH_DONE; 1157e948693eSPhilip Paeps 1158e948693eSPhilip Paeps txq->blocked = 0; 1159e948693eSPhilip Paeps txq->pending = txq->added; 1160e948693eSPhilip Paeps 1161cc933626SAndrew Rybchenko sfxge_tx_qcomplete(txq, evq); 1162e948693eSPhilip Paeps KASSERT(txq->completed == txq->added, 1163e948693eSPhilip Paeps ("txq->completed != txq->added")); 1164e948693eSPhilip Paeps 1165e948693eSPhilip Paeps sfxge_tx_qreap(txq); 1166e948693eSPhilip Paeps KASSERT(txq->reaped == txq->completed, 1167e948693eSPhilip Paeps ("txq->reaped != txq->completed")); 1168e948693eSPhilip Paeps 1169e948693eSPhilip Paeps txq->added = 0; 1170e948693eSPhilip Paeps txq->pending = 0; 1171e948693eSPhilip Paeps txq->completed = 0; 1172e948693eSPhilip Paeps txq->reaped = 0; 1173e948693eSPhilip Paeps 1174e948693eSPhilip Paeps /* Destroy the common code transmit queue. */ 1175e948693eSPhilip Paeps efx_tx_qdestroy(txq->common); 1176e948693eSPhilip Paeps txq->common = NULL; 1177e948693eSPhilip Paeps 1178e948693eSPhilip Paeps efx_sram_buf_tbl_clear(sc->enp, txq->buf_base_id, 1179385b1d8eSGeorge V. Neville-Neil EFX_TXQ_NBUFS(sc->txq_entries)); 1180e948693eSPhilip Paeps 1181763cab71SAndrew Rybchenko SFXGE_EVQ_UNLOCK(evq); 1182763cab71SAndrew Rybchenko SFXGE_TXQ_UNLOCK(txq); 1183e948693eSPhilip Paeps } 1184e948693eSPhilip Paeps 1185e948693eSPhilip Paeps static int 1186e948693eSPhilip Paeps sfxge_tx_qstart(struct sfxge_softc *sc, unsigned int index) 1187e948693eSPhilip Paeps { 1188e948693eSPhilip Paeps struct sfxge_txq *txq; 1189e948693eSPhilip Paeps efsys_mem_t *esmp; 1190e948693eSPhilip Paeps uint16_t flags; 1191e948693eSPhilip Paeps struct sfxge_evq *evq; 1192e948693eSPhilip Paeps int rc; 1193e948693eSPhilip Paeps 1194e948693eSPhilip Paeps txq = sc->txq[index]; 1195e948693eSPhilip Paeps esmp = &txq->mem; 1196e948693eSPhilip Paeps evq = sc->evq[txq->evq_index]; 1197e948693eSPhilip Paeps 1198e948693eSPhilip Paeps KASSERT(txq->init_state == SFXGE_TXQ_INITIALIZED, 1199e948693eSPhilip Paeps ("txq->init_state != SFXGE_TXQ_INITIALIZED")); 1200e948693eSPhilip Paeps KASSERT(evq->init_state == SFXGE_EVQ_STARTED, 1201e948693eSPhilip Paeps ("evq->init_state != SFXGE_EVQ_STARTED")); 1202e948693eSPhilip Paeps 1203e948693eSPhilip Paeps /* Program the buffer table. */ 1204e948693eSPhilip Paeps if ((rc = efx_sram_buf_tbl_set(sc->enp, txq->buf_base_id, esmp, 1205385b1d8eSGeorge V. Neville-Neil EFX_TXQ_NBUFS(sc->txq_entries))) != 0) 1206385b1d8eSGeorge V. Neville-Neil return (rc); 1207e948693eSPhilip Paeps 1208e948693eSPhilip Paeps /* Determine the kind of queue we are creating. */ 1209e948693eSPhilip Paeps switch (txq->type) { 1210e948693eSPhilip Paeps case SFXGE_TXQ_NON_CKSUM: 1211e948693eSPhilip Paeps flags = 0; 1212e948693eSPhilip Paeps break; 1213e948693eSPhilip Paeps case SFXGE_TXQ_IP_CKSUM: 1214e948693eSPhilip Paeps flags = EFX_CKSUM_IPV4; 1215e948693eSPhilip Paeps break; 1216e948693eSPhilip Paeps case SFXGE_TXQ_IP_TCP_UDP_CKSUM: 1217e948693eSPhilip Paeps flags = EFX_CKSUM_IPV4 | EFX_CKSUM_TCPUDP; 1218e948693eSPhilip Paeps break; 1219e948693eSPhilip Paeps default: 1220e948693eSPhilip Paeps KASSERT(0, ("Impossible TX queue")); 1221e948693eSPhilip Paeps flags = 0; 1222e948693eSPhilip Paeps break; 1223e948693eSPhilip Paeps } 1224e948693eSPhilip Paeps 1225e948693eSPhilip Paeps /* Create the common code transmit queue. */ 1226cf07c70dSGeorge V. Neville-Neil if ((rc = efx_tx_qcreate(sc->enp, index, txq->type, esmp, 1227385b1d8eSGeorge V. Neville-Neil sc->txq_entries, txq->buf_base_id, flags, evq->common, 1228e948693eSPhilip Paeps &txq->common)) != 0) 1229e948693eSPhilip Paeps goto fail; 1230e948693eSPhilip Paeps 1231763cab71SAndrew Rybchenko SFXGE_TXQ_LOCK(txq); 1232e948693eSPhilip Paeps 1233e948693eSPhilip Paeps /* Enable the transmit queue. */ 1234e948693eSPhilip Paeps efx_tx_qenable(txq->common); 1235e948693eSPhilip Paeps 1236e948693eSPhilip Paeps txq->init_state = SFXGE_TXQ_STARTED; 1237e948693eSPhilip Paeps 1238763cab71SAndrew Rybchenko SFXGE_TXQ_UNLOCK(txq); 1239e948693eSPhilip Paeps 1240e948693eSPhilip Paeps return (0); 1241e948693eSPhilip Paeps 1242e948693eSPhilip Paeps fail: 1243e948693eSPhilip Paeps efx_sram_buf_tbl_clear(sc->enp, txq->buf_base_id, 1244385b1d8eSGeorge V. Neville-Neil EFX_TXQ_NBUFS(sc->txq_entries)); 1245385b1d8eSGeorge V. Neville-Neil return (rc); 1246e948693eSPhilip Paeps } 1247e948693eSPhilip Paeps 1248e948693eSPhilip Paeps void 1249e948693eSPhilip Paeps sfxge_tx_stop(struct sfxge_softc *sc) 1250e948693eSPhilip Paeps { 1251e948693eSPhilip Paeps int index; 1252e948693eSPhilip Paeps 1253e2b05fe2SAndrew Rybchenko index = sc->txq_count; 1254e948693eSPhilip Paeps while (--index >= 0) 1255e2b05fe2SAndrew Rybchenko sfxge_tx_qstop(sc, index); 1256e948693eSPhilip Paeps 1257e948693eSPhilip Paeps /* Tear down the transmit module */ 1258e948693eSPhilip Paeps efx_tx_fini(sc->enp); 1259e948693eSPhilip Paeps } 1260e948693eSPhilip Paeps 1261e948693eSPhilip Paeps int 1262e948693eSPhilip Paeps sfxge_tx_start(struct sfxge_softc *sc) 1263e948693eSPhilip Paeps { 1264e948693eSPhilip Paeps int index; 1265e948693eSPhilip Paeps int rc; 1266e948693eSPhilip Paeps 1267e948693eSPhilip Paeps /* Initialize the common code transmit module. */ 1268e948693eSPhilip Paeps if ((rc = efx_tx_init(sc->enp)) != 0) 1269e948693eSPhilip Paeps return (rc); 1270e948693eSPhilip Paeps 1271e2b05fe2SAndrew Rybchenko for (index = 0; index < sc->txq_count; index++) { 1272e2b05fe2SAndrew Rybchenko if ((rc = sfxge_tx_qstart(sc, index)) != 0) 1273e948693eSPhilip Paeps goto fail; 1274e948693eSPhilip Paeps } 1275e948693eSPhilip Paeps 1276e948693eSPhilip Paeps return (0); 1277e948693eSPhilip Paeps 1278e948693eSPhilip Paeps fail: 1279e2b05fe2SAndrew Rybchenko while (--index >= 0) 1280e2b05fe2SAndrew Rybchenko sfxge_tx_qstop(sc, index); 1281e2b05fe2SAndrew Rybchenko 1282e948693eSPhilip Paeps efx_tx_fini(sc->enp); 1283e948693eSPhilip Paeps 1284e948693eSPhilip Paeps return (rc); 1285e948693eSPhilip Paeps } 1286e948693eSPhilip Paeps 1287f6222d7bSAndrew Rybchenko static int 1288f6222d7bSAndrew Rybchenko sfxge_txq_stat_init(struct sfxge_txq *txq, struct sysctl_oid *txq_node) 1289f6222d7bSAndrew Rybchenko { 1290f6222d7bSAndrew Rybchenko struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(txq->sc->dev); 1291f6222d7bSAndrew Rybchenko struct sysctl_oid *stat_node; 1292f6222d7bSAndrew Rybchenko unsigned int id; 1293f6222d7bSAndrew Rybchenko 1294f6222d7bSAndrew Rybchenko stat_node = SYSCTL_ADD_NODE(ctx, SYSCTL_CHILDREN(txq_node), OID_AUTO, 1295f6222d7bSAndrew Rybchenko "stats", CTLFLAG_RD, NULL, 1296f6222d7bSAndrew Rybchenko "Tx queue statistics"); 1297f6222d7bSAndrew Rybchenko if (stat_node == NULL) 1298f6222d7bSAndrew Rybchenko return (ENOMEM); 1299f6222d7bSAndrew Rybchenko 1300f6222d7bSAndrew Rybchenko for (id = 0; id < nitems(sfxge_tx_stats); id++) { 1301f6222d7bSAndrew Rybchenko SYSCTL_ADD_ULONG( 1302f6222d7bSAndrew Rybchenko ctx, SYSCTL_CHILDREN(stat_node), OID_AUTO, 1303f6222d7bSAndrew Rybchenko sfxge_tx_stats[id].name, CTLFLAG_RD | CTLFLAG_STATS, 1304f6222d7bSAndrew Rybchenko (unsigned long *)((caddr_t)txq + sfxge_tx_stats[id].offset), 1305f6222d7bSAndrew Rybchenko ""); 1306f6222d7bSAndrew Rybchenko } 1307f6222d7bSAndrew Rybchenko 1308f6222d7bSAndrew Rybchenko return (0); 1309f6222d7bSAndrew Rybchenko } 1310f6222d7bSAndrew Rybchenko 1311e948693eSPhilip Paeps /** 1312e948693eSPhilip Paeps * Destroy a transmit queue. 1313e948693eSPhilip Paeps */ 1314e948693eSPhilip Paeps static void 1315e948693eSPhilip Paeps sfxge_tx_qfini(struct sfxge_softc *sc, unsigned int index) 1316e948693eSPhilip Paeps { 1317e948693eSPhilip Paeps struct sfxge_txq *txq; 1318385b1d8eSGeorge V. Neville-Neil unsigned int nmaps; 1319e948693eSPhilip Paeps 1320e948693eSPhilip Paeps txq = sc->txq[index]; 1321e948693eSPhilip Paeps 1322e948693eSPhilip Paeps KASSERT(txq->init_state == SFXGE_TXQ_INITIALIZED, 1323e948693eSPhilip Paeps ("txq->init_state != SFXGE_TXQ_INITIALIZED")); 1324e948693eSPhilip Paeps 1325e948693eSPhilip Paeps if (txq->type == SFXGE_TXQ_IP_TCP_UDP_CKSUM) 1326e948693eSPhilip Paeps tso_fini(txq); 1327e948693eSPhilip Paeps 1328e948693eSPhilip Paeps /* Free the context arrays. */ 1329e948693eSPhilip Paeps free(txq->pend_desc, M_SFXGE); 1330385b1d8eSGeorge V. Neville-Neil nmaps = sc->txq_entries; 1331b7b0edd1SGeorge V. Neville-Neil while (nmaps-- != 0) 1332e948693eSPhilip Paeps bus_dmamap_destroy(txq->packet_dma_tag, txq->stmp[nmaps].map); 1333e948693eSPhilip Paeps free(txq->stmp, M_SFXGE); 1334e948693eSPhilip Paeps 1335e948693eSPhilip Paeps /* Release DMA memory mapping. */ 1336e948693eSPhilip Paeps sfxge_dma_free(&txq->mem); 1337e948693eSPhilip Paeps 1338e948693eSPhilip Paeps sc->txq[index] = NULL; 1339e948693eSPhilip Paeps 1340763cab71SAndrew Rybchenko SFXGE_TXQ_LOCK_DESTROY(txq); 1341e948693eSPhilip Paeps 1342e948693eSPhilip Paeps free(txq, M_SFXGE); 1343e948693eSPhilip Paeps } 1344e948693eSPhilip Paeps 1345e948693eSPhilip Paeps static int 1346e948693eSPhilip Paeps sfxge_tx_qinit(struct sfxge_softc *sc, unsigned int txq_index, 1347e948693eSPhilip Paeps enum sfxge_txq_type type, unsigned int evq_index) 1348e948693eSPhilip Paeps { 1349bc85c897SGeorge V. Neville-Neil char name[16]; 135095caaf0fSAndrew Rybchenko struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(sc->dev); 1351bc85c897SGeorge V. Neville-Neil struct sysctl_oid *txq_node; 1352e948693eSPhilip Paeps struct sfxge_txq *txq; 1353e948693eSPhilip Paeps struct sfxge_evq *evq; 1354e948693eSPhilip Paeps struct sfxge_tx_dpl *stdp; 135595caaf0fSAndrew Rybchenko struct sysctl_oid *dpl_node; 1356e948693eSPhilip Paeps efsys_mem_t *esmp; 1357e948693eSPhilip Paeps unsigned int nmaps; 1358e948693eSPhilip Paeps int rc; 1359e948693eSPhilip Paeps 1360e948693eSPhilip Paeps txq = malloc(sizeof(struct sfxge_txq), M_SFXGE, M_ZERO | M_WAITOK); 1361e948693eSPhilip Paeps txq->sc = sc; 1362385b1d8eSGeorge V. Neville-Neil txq->entries = sc->txq_entries; 1363385b1d8eSGeorge V. Neville-Neil txq->ptr_mask = txq->entries - 1; 1364e948693eSPhilip Paeps 1365e948693eSPhilip Paeps sc->txq[txq_index] = txq; 1366e948693eSPhilip Paeps esmp = &txq->mem; 1367e948693eSPhilip Paeps 1368e948693eSPhilip Paeps evq = sc->evq[evq_index]; 1369e948693eSPhilip Paeps 1370e948693eSPhilip Paeps /* Allocate and zero DMA space for the descriptor ring. */ 1371385b1d8eSGeorge V. Neville-Neil if ((rc = sfxge_dma_alloc(sc, EFX_TXQ_SIZE(sc->txq_entries), esmp)) != 0) 1372e948693eSPhilip Paeps return (rc); 1373e948693eSPhilip Paeps 1374e948693eSPhilip Paeps /* Allocate buffer table entries. */ 1375385b1d8eSGeorge V. Neville-Neil sfxge_sram_buf_tbl_alloc(sc, EFX_TXQ_NBUFS(sc->txq_entries), 1376e948693eSPhilip Paeps &txq->buf_base_id); 1377e948693eSPhilip Paeps 1378e948693eSPhilip Paeps /* Create a DMA tag for packet mappings. */ 1379fb8ccc78SMarius Strobl if (bus_dma_tag_create(sc->parent_dma_tag, 1, 0x1000, 1380fb8ccc78SMarius Strobl MIN(0x3FFFFFFFFFFFUL, BUS_SPACE_MAXADDR), BUS_SPACE_MAXADDR, NULL, 1381fb8ccc78SMarius Strobl NULL, 0x11000, SFXGE_TX_MAPPING_MAX_SEG, 0x1000, 0, NULL, NULL, 1382e948693eSPhilip Paeps &txq->packet_dma_tag) != 0) { 1383e948693eSPhilip Paeps device_printf(sc->dev, "Couldn't allocate txq DMA tag\n"); 1384e948693eSPhilip Paeps rc = ENOMEM; 1385e948693eSPhilip Paeps goto fail; 1386e948693eSPhilip Paeps } 1387e948693eSPhilip Paeps 1388e948693eSPhilip Paeps /* Allocate pending descriptor array for batching writes. */ 1389385b1d8eSGeorge V. Neville-Neil txq->pend_desc = malloc(sizeof(efx_buffer_t) * sc->txq_entries, 1390e948693eSPhilip Paeps M_SFXGE, M_ZERO | M_WAITOK); 1391e948693eSPhilip Paeps 1392e948693eSPhilip Paeps /* Allocate and initialise mbuf DMA mapping array. */ 1393385b1d8eSGeorge V. Neville-Neil txq->stmp = malloc(sizeof(struct sfxge_tx_mapping) * sc->txq_entries, 1394e948693eSPhilip Paeps M_SFXGE, M_ZERO | M_WAITOK); 1395385b1d8eSGeorge V. Neville-Neil for (nmaps = 0; nmaps < sc->txq_entries; nmaps++) { 1396e948693eSPhilip Paeps rc = bus_dmamap_create(txq->packet_dma_tag, 0, 1397e948693eSPhilip Paeps &txq->stmp[nmaps].map); 1398e948693eSPhilip Paeps if (rc != 0) 1399e948693eSPhilip Paeps goto fail2; 1400e948693eSPhilip Paeps } 1401e948693eSPhilip Paeps 1402bc85c897SGeorge V. Neville-Neil snprintf(name, sizeof(name), "%u", txq_index); 140395caaf0fSAndrew Rybchenko txq_node = SYSCTL_ADD_NODE(ctx, SYSCTL_CHILDREN(sc->txqs_node), 1404bc85c897SGeorge V. Neville-Neil OID_AUTO, name, CTLFLAG_RD, NULL, ""); 1405bc85c897SGeorge V. Neville-Neil if (txq_node == NULL) { 1406bc85c897SGeorge V. Neville-Neil rc = ENOMEM; 1407bc85c897SGeorge V. Neville-Neil goto fail_txq_node; 1408bc85c897SGeorge V. Neville-Neil } 1409bc85c897SGeorge V. Neville-Neil 1410e948693eSPhilip Paeps if (type == SFXGE_TXQ_IP_TCP_UDP_CKSUM && 1411e948693eSPhilip Paeps (rc = tso_init(txq)) != 0) 1412e948693eSPhilip Paeps goto fail3; 1413e948693eSPhilip Paeps 1414060a95efSGeorge V. Neville-Neil if (sfxge_tx_dpl_get_max <= 0) { 1415060a95efSGeorge V. Neville-Neil log(LOG_ERR, "%s=%d must be greater than 0", 1416060a95efSGeorge V. Neville-Neil SFXGE_PARAM_TX_DPL_GET_MAX, sfxge_tx_dpl_get_max); 1417060a95efSGeorge V. Neville-Neil rc = EINVAL; 1418060a95efSGeorge V. Neville-Neil goto fail_tx_dpl_get_max; 1419060a95efSGeorge V. Neville-Neil } 142093929f25SAndrew Rybchenko if (sfxge_tx_dpl_get_non_tcp_max <= 0) { 142193929f25SAndrew Rybchenko log(LOG_ERR, "%s=%d must be greater than 0", 142293929f25SAndrew Rybchenko SFXGE_PARAM_TX_DPL_GET_NON_TCP_MAX, 142393929f25SAndrew Rybchenko sfxge_tx_dpl_get_non_tcp_max); 142493929f25SAndrew Rybchenko rc = EINVAL; 142593929f25SAndrew Rybchenko goto fail_tx_dpl_get_max; 142693929f25SAndrew Rybchenko } 1427060a95efSGeorge V. Neville-Neil if (sfxge_tx_dpl_put_max < 0) { 1428060a95efSGeorge V. Neville-Neil log(LOG_ERR, "%s=%d must be greater or equal to 0", 1429060a95efSGeorge V. Neville-Neil SFXGE_PARAM_TX_DPL_PUT_MAX, sfxge_tx_dpl_put_max); 1430060a95efSGeorge V. Neville-Neil rc = EINVAL; 1431060a95efSGeorge V. Neville-Neil goto fail_tx_dpl_put_max; 1432060a95efSGeorge V. Neville-Neil } 1433060a95efSGeorge V. Neville-Neil 1434e948693eSPhilip Paeps /* Initialize the deferred packet list. */ 1435e948693eSPhilip Paeps stdp = &txq->dpl; 1436060a95efSGeorge V. Neville-Neil stdp->std_put_max = sfxge_tx_dpl_put_max; 1437060a95efSGeorge V. Neville-Neil stdp->std_get_max = sfxge_tx_dpl_get_max; 143893929f25SAndrew Rybchenko stdp->std_get_non_tcp_max = sfxge_tx_dpl_get_non_tcp_max; 1439e948693eSPhilip Paeps stdp->std_getp = &stdp->std_get; 1440e948693eSPhilip Paeps 144133d45dc5SAndrew Rybchenko SFXGE_TXQ_LOCK_INIT(txq, device_get_nameunit(sc->dev), txq_index); 1442bc85c897SGeorge V. Neville-Neil 144395caaf0fSAndrew Rybchenko dpl_node = SYSCTL_ADD_NODE(ctx, SYSCTL_CHILDREN(txq_node), OID_AUTO, 144495caaf0fSAndrew Rybchenko "dpl", CTLFLAG_RD, NULL, 144595caaf0fSAndrew Rybchenko "Deferred packet list statistics"); 144695caaf0fSAndrew Rybchenko if (dpl_node == NULL) { 144795caaf0fSAndrew Rybchenko rc = ENOMEM; 144895caaf0fSAndrew Rybchenko goto fail_dpl_node; 144995caaf0fSAndrew Rybchenko } 145095caaf0fSAndrew Rybchenko 145195caaf0fSAndrew Rybchenko SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(dpl_node), OID_AUTO, 145295caaf0fSAndrew Rybchenko "get_count", CTLFLAG_RD | CTLFLAG_STATS, 1453bc85c897SGeorge V. Neville-Neil &stdp->std_get_count, 0, ""); 145495caaf0fSAndrew Rybchenko SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(dpl_node), OID_AUTO, 145595caaf0fSAndrew Rybchenko "get_non_tcp_count", CTLFLAG_RD | CTLFLAG_STATS, 145693929f25SAndrew Rybchenko &stdp->std_get_non_tcp_count, 0, ""); 145795caaf0fSAndrew Rybchenko SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(dpl_node), OID_AUTO, 145895caaf0fSAndrew Rybchenko "get_hiwat", CTLFLAG_RD | CTLFLAG_STATS, 145993929f25SAndrew Rybchenko &stdp->std_get_hiwat, 0, ""); 146095caaf0fSAndrew Rybchenko SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(dpl_node), OID_AUTO, 146195caaf0fSAndrew Rybchenko "put_hiwat", CTLFLAG_RD | CTLFLAG_STATS, 1462bce6d281SAndrew Rybchenko &stdp->std_put_hiwat, 0, ""); 1463e948693eSPhilip Paeps 1464f6222d7bSAndrew Rybchenko rc = sfxge_txq_stat_init(txq, txq_node); 1465f6222d7bSAndrew Rybchenko if (rc != 0) 1466f6222d7bSAndrew Rybchenko goto fail_txq_stat_init; 1467f6222d7bSAndrew Rybchenko 1468e948693eSPhilip Paeps txq->type = type; 1469e948693eSPhilip Paeps txq->evq_index = evq_index; 1470e948693eSPhilip Paeps txq->txq_index = txq_index; 1471e948693eSPhilip Paeps txq->init_state = SFXGE_TXQ_INITIALIZED; 1472e948693eSPhilip Paeps 1473e948693eSPhilip Paeps return (0); 1474e948693eSPhilip Paeps 1475f6222d7bSAndrew Rybchenko fail_txq_stat_init: 147695caaf0fSAndrew Rybchenko fail_dpl_node: 1477060a95efSGeorge V. Neville-Neil fail_tx_dpl_put_max: 1478060a95efSGeorge V. Neville-Neil fail_tx_dpl_get_max: 1479e948693eSPhilip Paeps fail3: 1480bc85c897SGeorge V. Neville-Neil fail_txq_node: 1481e948693eSPhilip Paeps free(txq->pend_desc, M_SFXGE); 1482e948693eSPhilip Paeps fail2: 1483b7b0edd1SGeorge V. Neville-Neil while (nmaps-- != 0) 1484e948693eSPhilip Paeps bus_dmamap_destroy(txq->packet_dma_tag, txq->stmp[nmaps].map); 1485e948693eSPhilip Paeps free(txq->stmp, M_SFXGE); 1486e948693eSPhilip Paeps bus_dma_tag_destroy(txq->packet_dma_tag); 1487e948693eSPhilip Paeps 1488e948693eSPhilip Paeps fail: 1489e948693eSPhilip Paeps sfxge_dma_free(esmp); 1490e948693eSPhilip Paeps 1491e948693eSPhilip Paeps return (rc); 1492e948693eSPhilip Paeps } 1493e948693eSPhilip Paeps 1494e948693eSPhilip Paeps static int 1495e948693eSPhilip Paeps sfxge_tx_stat_handler(SYSCTL_HANDLER_ARGS) 1496e948693eSPhilip Paeps { 1497e948693eSPhilip Paeps struct sfxge_softc *sc = arg1; 1498e948693eSPhilip Paeps unsigned int id = arg2; 1499e948693eSPhilip Paeps unsigned long sum; 1500e948693eSPhilip Paeps unsigned int index; 1501e948693eSPhilip Paeps 1502e948693eSPhilip Paeps /* Sum across all TX queues */ 1503e948693eSPhilip Paeps sum = 0; 1504e2b05fe2SAndrew Rybchenko for (index = 0; index < sc->txq_count; index++) 1505e948693eSPhilip Paeps sum += *(unsigned long *)((caddr_t)sc->txq[index] + 1506e948693eSPhilip Paeps sfxge_tx_stats[id].offset); 1507e948693eSPhilip Paeps 1508b7b0edd1SGeorge V. Neville-Neil return (SYSCTL_OUT(req, &sum, sizeof(sum))); 1509e948693eSPhilip Paeps } 1510e948693eSPhilip Paeps 1511e948693eSPhilip Paeps static void 1512e948693eSPhilip Paeps sfxge_tx_stat_init(struct sfxge_softc *sc) 1513e948693eSPhilip Paeps { 1514e948693eSPhilip Paeps struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(sc->dev); 1515e948693eSPhilip Paeps struct sysctl_oid_list *stat_list; 1516e948693eSPhilip Paeps unsigned int id; 1517e948693eSPhilip Paeps 1518e948693eSPhilip Paeps stat_list = SYSCTL_CHILDREN(sc->stats_node); 1519e948693eSPhilip Paeps 1520612d8e28SAndrew Rybchenko for (id = 0; id < nitems(sfxge_tx_stats); id++) { 1521e948693eSPhilip Paeps SYSCTL_ADD_PROC( 1522e948693eSPhilip Paeps ctx, stat_list, 1523e948693eSPhilip Paeps OID_AUTO, sfxge_tx_stats[id].name, 1524e948693eSPhilip Paeps CTLTYPE_ULONG|CTLFLAG_RD, 1525e948693eSPhilip Paeps sc, id, sfxge_tx_stat_handler, "LU", 1526e948693eSPhilip Paeps ""); 1527e948693eSPhilip Paeps } 1528e948693eSPhilip Paeps } 1529e948693eSPhilip Paeps 15303d8fce27SAndrew Rybchenko uint64_t 15313d8fce27SAndrew Rybchenko sfxge_tx_get_drops(struct sfxge_softc *sc) 15323d8fce27SAndrew Rybchenko { 15333d8fce27SAndrew Rybchenko unsigned int index; 15343d8fce27SAndrew Rybchenko uint64_t drops = 0; 15353d8fce27SAndrew Rybchenko struct sfxge_txq *txq; 15363d8fce27SAndrew Rybchenko 15373d8fce27SAndrew Rybchenko /* Sum across all TX queues */ 15383d8fce27SAndrew Rybchenko for (index = 0; index < sc->txq_count; index++) { 15393d8fce27SAndrew Rybchenko txq = sc->txq[index]; 15403d8fce27SAndrew Rybchenko /* 15413d8fce27SAndrew Rybchenko * In theory, txq->put_overflow and txq->netdown_drops 15423d8fce27SAndrew Rybchenko * should use atomic operation and other should be 15433d8fce27SAndrew Rybchenko * obtained under txq lock, but it is just statistics. 15443d8fce27SAndrew Rybchenko */ 15453d8fce27SAndrew Rybchenko drops += txq->drops + txq->get_overflow + 15463d8fce27SAndrew Rybchenko txq->get_non_tcp_overflow + 15473d8fce27SAndrew Rybchenko txq->put_overflow + txq->netdown_drops + 15483d8fce27SAndrew Rybchenko txq->tso_pdrop_too_many + txq->tso_pdrop_no_rsrc; 15493d8fce27SAndrew Rybchenko } 15503d8fce27SAndrew Rybchenko return (drops); 15513d8fce27SAndrew Rybchenko } 15523d8fce27SAndrew Rybchenko 1553e948693eSPhilip Paeps void 1554e948693eSPhilip Paeps sfxge_tx_fini(struct sfxge_softc *sc) 1555e948693eSPhilip Paeps { 1556e948693eSPhilip Paeps int index; 1557e948693eSPhilip Paeps 1558e2b05fe2SAndrew Rybchenko index = sc->txq_count; 1559e948693eSPhilip Paeps while (--index >= 0) 1560e2b05fe2SAndrew Rybchenko sfxge_tx_qfini(sc, index); 1561e948693eSPhilip Paeps 1562e2b05fe2SAndrew Rybchenko sc->txq_count = 0; 1563e948693eSPhilip Paeps } 1564e948693eSPhilip Paeps 1565e948693eSPhilip Paeps 1566e948693eSPhilip Paeps int 1567e948693eSPhilip Paeps sfxge_tx_init(struct sfxge_softc *sc) 1568e948693eSPhilip Paeps { 1569e948693eSPhilip Paeps struct sfxge_intr *intr; 1570e948693eSPhilip Paeps int index; 1571e948693eSPhilip Paeps int rc; 1572e948693eSPhilip Paeps 1573e948693eSPhilip Paeps intr = &sc->intr; 1574e948693eSPhilip Paeps 1575e948693eSPhilip Paeps KASSERT(intr->state == SFXGE_INTR_INITIALIZED, 1576e948693eSPhilip Paeps ("intr->state != SFXGE_INTR_INITIALIZED")); 1577e948693eSPhilip Paeps 1578e2b05fe2SAndrew Rybchenko sc->txq_count = SFXGE_TXQ_NTYPES - 1 + sc->intr.n_alloc; 1579e2b05fe2SAndrew Rybchenko 1580bc85c897SGeorge V. Neville-Neil sc->txqs_node = SYSCTL_ADD_NODE( 1581bc85c897SGeorge V. Neville-Neil device_get_sysctl_ctx(sc->dev), 1582bc85c897SGeorge V. Neville-Neil SYSCTL_CHILDREN(device_get_sysctl_tree(sc->dev)), 1583bc85c897SGeorge V. Neville-Neil OID_AUTO, "txq", CTLFLAG_RD, NULL, "Tx queues"); 1584bc85c897SGeorge V. Neville-Neil if (sc->txqs_node == NULL) { 1585bc85c897SGeorge V. Neville-Neil rc = ENOMEM; 1586bc85c897SGeorge V. Neville-Neil goto fail_txq_node; 1587bc85c897SGeorge V. Neville-Neil } 1588bc85c897SGeorge V. Neville-Neil 1589e948693eSPhilip Paeps /* Initialize the transmit queues */ 1590e948693eSPhilip Paeps if ((rc = sfxge_tx_qinit(sc, SFXGE_TXQ_NON_CKSUM, 1591e948693eSPhilip Paeps SFXGE_TXQ_NON_CKSUM, 0)) != 0) 1592e948693eSPhilip Paeps goto fail; 1593e948693eSPhilip Paeps 1594e948693eSPhilip Paeps if ((rc = sfxge_tx_qinit(sc, SFXGE_TXQ_IP_CKSUM, 1595e948693eSPhilip Paeps SFXGE_TXQ_IP_CKSUM, 0)) != 0) 1596e948693eSPhilip Paeps goto fail2; 1597e948693eSPhilip Paeps 1598e2b05fe2SAndrew Rybchenko for (index = 0; 1599e2b05fe2SAndrew Rybchenko index < sc->txq_count - SFXGE_TXQ_NTYPES + 1; 1600e2b05fe2SAndrew Rybchenko index++) { 1601e2b05fe2SAndrew Rybchenko if ((rc = sfxge_tx_qinit(sc, SFXGE_TXQ_NTYPES - 1 + index, 1602e948693eSPhilip Paeps SFXGE_TXQ_IP_TCP_UDP_CKSUM, index)) != 0) 1603e948693eSPhilip Paeps goto fail3; 1604e948693eSPhilip Paeps } 1605e948693eSPhilip Paeps 1606e948693eSPhilip Paeps sfxge_tx_stat_init(sc); 1607e948693eSPhilip Paeps 1608e948693eSPhilip Paeps return (0); 1609e948693eSPhilip Paeps 1610e948693eSPhilip Paeps fail3: 1611e948693eSPhilip Paeps while (--index >= 0) 1612e948693eSPhilip Paeps sfxge_tx_qfini(sc, SFXGE_TXQ_IP_TCP_UDP_CKSUM + index); 1613e948693eSPhilip Paeps 1614e2b05fe2SAndrew Rybchenko sfxge_tx_qfini(sc, SFXGE_TXQ_IP_CKSUM); 1615e2b05fe2SAndrew Rybchenko 1616e948693eSPhilip Paeps fail2: 1617e948693eSPhilip Paeps sfxge_tx_qfini(sc, SFXGE_TXQ_NON_CKSUM); 1618e948693eSPhilip Paeps 1619e948693eSPhilip Paeps fail: 1620bc85c897SGeorge V. Neville-Neil fail_txq_node: 1621e2b05fe2SAndrew Rybchenko sc->txq_count = 0; 1622e948693eSPhilip Paeps return (rc); 1623e948693eSPhilip Paeps } 1624