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 70e948693eSPhilip Paeps /* Set the block level to ensure there is space to generate a 71e948693eSPhilip Paeps * large number of descriptors for TSO. With minimum MSS and 72e948693eSPhilip Paeps * maximum mbuf length we might need more than a ring-ful of 73e948693eSPhilip Paeps * descriptors, but this should not happen in practice except 74e948693eSPhilip Paeps * due to deliberate attack. In that case we will truncate 75e948693eSPhilip Paeps * the output at a packet boundary. Allow for a reasonable 76e948693eSPhilip Paeps * minimum MSS of 512. 77e948693eSPhilip Paeps */ 78e948693eSPhilip Paeps #define SFXGE_TSO_MAX_DESC ((65535 / 512) * 2 + SFXGE_TX_MAPPING_MAX_SEG - 1) 79385b1d8eSGeorge V. Neville-Neil #define SFXGE_TXQ_BLOCK_LEVEL(_entries) ((_entries) - SFXGE_TSO_MAX_DESC) 80e948693eSPhilip Paeps 81060a95efSGeorge V. Neville-Neil #ifdef SFXGE_HAVE_MQ 82060a95efSGeorge V. Neville-Neil 83060a95efSGeorge V. Neville-Neil #define SFXGE_PARAM_TX_DPL_GET_MAX SFXGE_PARAM(tx_dpl_get_max) 84060a95efSGeorge V. Neville-Neil static int sfxge_tx_dpl_get_max = SFXGE_TX_DPL_GET_PKT_LIMIT_DEFAULT; 85060a95efSGeorge V. Neville-Neil TUNABLE_INT(SFXGE_PARAM_TX_DPL_GET_MAX, &sfxge_tx_dpl_get_max); 86060a95efSGeorge V. Neville-Neil SYSCTL_INT(_hw_sfxge, OID_AUTO, tx_dpl_get_max, CTLFLAG_RDTUN, 87060a95efSGeorge V. Neville-Neil &sfxge_tx_dpl_get_max, 0, 88060a95efSGeorge V. Neville-Neil "Maximum number of packets in deferred packet get-list"); 89060a95efSGeorge V. Neville-Neil 90060a95efSGeorge V. Neville-Neil #define SFXGE_PARAM_TX_DPL_PUT_MAX SFXGE_PARAM(tx_dpl_put_max) 91060a95efSGeorge V. Neville-Neil static int sfxge_tx_dpl_put_max = SFXGE_TX_DPL_PUT_PKT_LIMIT_DEFAULT; 92060a95efSGeorge V. Neville-Neil TUNABLE_INT(SFXGE_PARAM_TX_DPL_PUT_MAX, &sfxge_tx_dpl_put_max); 93060a95efSGeorge V. Neville-Neil SYSCTL_INT(_hw_sfxge, OID_AUTO, tx_dpl_put_max, CTLFLAG_RDTUN, 94060a95efSGeorge V. Neville-Neil &sfxge_tx_dpl_put_max, 0, 95060a95efSGeorge V. Neville-Neil "Maximum number of packets in deferred packet put-list"); 96060a95efSGeorge V. Neville-Neil 97060a95efSGeorge V. Neville-Neil #endif 98060a95efSGeorge V. Neville-Neil 99060a95efSGeorge V. Neville-Neil 100e948693eSPhilip Paeps /* Forward declarations. */ 101e948693eSPhilip Paeps static inline void sfxge_tx_qdpl_service(struct sfxge_txq *txq); 102e948693eSPhilip Paeps static void sfxge_tx_qlist_post(struct sfxge_txq *txq); 103e948693eSPhilip Paeps static void sfxge_tx_qunblock(struct sfxge_txq *txq); 104e948693eSPhilip Paeps static int sfxge_tx_queue_tso(struct sfxge_txq *txq, struct mbuf *mbuf, 105e948693eSPhilip Paeps const bus_dma_segment_t *dma_seg, int n_dma_seg); 106e948693eSPhilip Paeps 107e948693eSPhilip Paeps void 108e948693eSPhilip Paeps sfxge_tx_qcomplete(struct sfxge_txq *txq) 109e948693eSPhilip Paeps { 110e948693eSPhilip Paeps struct sfxge_softc *sc; 111e948693eSPhilip Paeps struct sfxge_evq *evq; 112e948693eSPhilip Paeps unsigned int completed; 113e948693eSPhilip Paeps 114e948693eSPhilip Paeps sc = txq->sc; 115e948693eSPhilip Paeps evq = sc->evq[txq->evq_index]; 116e948693eSPhilip Paeps 117e948693eSPhilip Paeps mtx_assert(&evq->lock, MA_OWNED); 118e948693eSPhilip Paeps 119e948693eSPhilip Paeps completed = txq->completed; 120e948693eSPhilip Paeps while (completed != txq->pending) { 121e948693eSPhilip Paeps struct sfxge_tx_mapping *stmp; 122e948693eSPhilip Paeps unsigned int id; 123e948693eSPhilip Paeps 124385b1d8eSGeorge V. Neville-Neil id = completed++ & txq->ptr_mask; 125e948693eSPhilip Paeps 126e948693eSPhilip Paeps stmp = &txq->stmp[id]; 127e948693eSPhilip Paeps if (stmp->flags & TX_BUF_UNMAP) { 128e948693eSPhilip Paeps bus_dmamap_unload(txq->packet_dma_tag, stmp->map); 129e948693eSPhilip Paeps if (stmp->flags & TX_BUF_MBUF) { 130e948693eSPhilip Paeps struct mbuf *m = stmp->u.mbuf; 131e948693eSPhilip Paeps do 132e948693eSPhilip Paeps m = m_free(m); 133e948693eSPhilip Paeps while (m != NULL); 134e948693eSPhilip Paeps } else { 135e948693eSPhilip Paeps free(stmp->u.heap_buf, M_SFXGE); 136e948693eSPhilip Paeps } 137e948693eSPhilip Paeps stmp->flags = 0; 138e948693eSPhilip Paeps } 139e948693eSPhilip Paeps } 140e948693eSPhilip Paeps txq->completed = completed; 141e948693eSPhilip Paeps 142e948693eSPhilip Paeps /* Check whether we need to unblock the queue. */ 143e948693eSPhilip Paeps mb(); 144e948693eSPhilip Paeps if (txq->blocked) { 145e948693eSPhilip Paeps unsigned int level; 146e948693eSPhilip Paeps 147e948693eSPhilip Paeps level = txq->added - txq->completed; 148385b1d8eSGeorge V. Neville-Neil if (level <= SFXGE_TXQ_UNBLOCK_LEVEL(txq->entries)) 149e948693eSPhilip Paeps sfxge_tx_qunblock(txq); 150e948693eSPhilip Paeps } 151e948693eSPhilip Paeps } 152e948693eSPhilip Paeps 153e948693eSPhilip Paeps #ifdef SFXGE_HAVE_MQ 154e948693eSPhilip Paeps 155e948693eSPhilip Paeps /* 156e948693eSPhilip Paeps * Reorder the put list and append it to the get list. 157e948693eSPhilip Paeps */ 158e948693eSPhilip Paeps static void 159e948693eSPhilip Paeps sfxge_tx_qdpl_swizzle(struct sfxge_txq *txq) 160e948693eSPhilip Paeps { 161e948693eSPhilip Paeps struct sfxge_tx_dpl *stdp; 162e948693eSPhilip Paeps struct mbuf *mbuf, *get_next, **get_tailp; 163e948693eSPhilip Paeps volatile uintptr_t *putp; 164e948693eSPhilip Paeps uintptr_t put; 165e948693eSPhilip Paeps unsigned int count; 166e948693eSPhilip Paeps 167e948693eSPhilip Paeps mtx_assert(&txq->lock, MA_OWNED); 168e948693eSPhilip Paeps 169e948693eSPhilip Paeps stdp = &txq->dpl; 170e948693eSPhilip Paeps 171e948693eSPhilip Paeps /* Acquire the put list. */ 172e948693eSPhilip Paeps putp = &stdp->std_put; 173fb8ccc78SMarius Strobl put = atomic_readandclear_ptr(putp); 174e948693eSPhilip Paeps mbuf = (void *)put; 175e948693eSPhilip Paeps 176e948693eSPhilip Paeps if (mbuf == NULL) 177e948693eSPhilip Paeps return; 178e948693eSPhilip Paeps 179e948693eSPhilip Paeps /* Reverse the put list. */ 180e948693eSPhilip Paeps get_tailp = &mbuf->m_nextpkt; 181e948693eSPhilip Paeps get_next = NULL; 182e948693eSPhilip Paeps 183e948693eSPhilip Paeps count = 0; 184e948693eSPhilip Paeps do { 185e948693eSPhilip Paeps struct mbuf *put_next; 186e948693eSPhilip Paeps 187e948693eSPhilip Paeps put_next = mbuf->m_nextpkt; 188e948693eSPhilip Paeps mbuf->m_nextpkt = get_next; 189e948693eSPhilip Paeps get_next = mbuf; 190e948693eSPhilip Paeps mbuf = put_next; 191e948693eSPhilip Paeps 192e948693eSPhilip Paeps count++; 193e948693eSPhilip Paeps } while (mbuf != NULL); 194e948693eSPhilip Paeps 195e948693eSPhilip Paeps /* Append the reversed put list to the get list. */ 196e948693eSPhilip Paeps KASSERT(*get_tailp == NULL, ("*get_tailp != NULL")); 197e948693eSPhilip Paeps *stdp->std_getp = get_next; 198e948693eSPhilip Paeps stdp->std_getp = get_tailp; 199bc85c897SGeorge V. Neville-Neil stdp->std_get_count += count; 200e948693eSPhilip Paeps } 201e948693eSPhilip Paeps 202e948693eSPhilip Paeps #endif /* SFXGE_HAVE_MQ */ 203e948693eSPhilip Paeps 204e948693eSPhilip Paeps static void 205e948693eSPhilip Paeps sfxge_tx_qreap(struct sfxge_txq *txq) 206e948693eSPhilip Paeps { 207e948693eSPhilip Paeps mtx_assert(SFXGE_TXQ_LOCK(txq), MA_OWNED); 208e948693eSPhilip Paeps 209e948693eSPhilip Paeps txq->reaped = txq->completed; 210e948693eSPhilip Paeps } 211e948693eSPhilip Paeps 212e948693eSPhilip Paeps static void 213e948693eSPhilip Paeps sfxge_tx_qlist_post(struct sfxge_txq *txq) 214e948693eSPhilip Paeps { 215e948693eSPhilip Paeps unsigned int old_added; 216e948693eSPhilip Paeps unsigned int level; 217e948693eSPhilip Paeps int rc; 218e948693eSPhilip Paeps 219e948693eSPhilip Paeps mtx_assert(SFXGE_TXQ_LOCK(txq), MA_OWNED); 220e948693eSPhilip Paeps 221e948693eSPhilip Paeps KASSERT(txq->n_pend_desc != 0, ("txq->n_pend_desc == 0")); 222e948693eSPhilip Paeps KASSERT(txq->n_pend_desc <= SFXGE_TSO_MAX_DESC, 223e948693eSPhilip Paeps ("txq->n_pend_desc too large")); 224e948693eSPhilip Paeps KASSERT(!txq->blocked, ("txq->blocked")); 225e948693eSPhilip Paeps 226e948693eSPhilip Paeps old_added = txq->added; 227e948693eSPhilip Paeps 228e948693eSPhilip Paeps /* Post the fragment list. */ 229e948693eSPhilip Paeps rc = efx_tx_qpost(txq->common, txq->pend_desc, txq->n_pend_desc, 230e948693eSPhilip Paeps txq->reaped, &txq->added); 231e948693eSPhilip Paeps KASSERT(rc == 0, ("efx_tx_qpost() failed")); 232e948693eSPhilip Paeps 233e948693eSPhilip Paeps /* If efx_tx_qpost() had to refragment, our information about 234e948693eSPhilip Paeps * buffers to free may be associated with the wrong 235e948693eSPhilip Paeps * descriptors. 236e948693eSPhilip Paeps */ 237e948693eSPhilip Paeps KASSERT(txq->added - old_added == txq->n_pend_desc, 238e948693eSPhilip Paeps ("efx_tx_qpost() refragmented descriptors")); 239e948693eSPhilip Paeps 240e948693eSPhilip Paeps level = txq->added - txq->reaped; 241385b1d8eSGeorge V. Neville-Neil KASSERT(level <= txq->entries, ("overfilled TX queue")); 242e948693eSPhilip Paeps 243e948693eSPhilip Paeps /* Clear the fragment list. */ 244e948693eSPhilip Paeps txq->n_pend_desc = 0; 245e948693eSPhilip Paeps 246e948693eSPhilip Paeps /* Have we reached the block level? */ 247385b1d8eSGeorge V. Neville-Neil if (level < SFXGE_TXQ_BLOCK_LEVEL(txq->entries)) 248e948693eSPhilip Paeps return; 249e948693eSPhilip Paeps 250e948693eSPhilip Paeps /* Reap, and check again */ 251e948693eSPhilip Paeps sfxge_tx_qreap(txq); 252e948693eSPhilip Paeps level = txq->added - txq->reaped; 253385b1d8eSGeorge V. Neville-Neil if (level < SFXGE_TXQ_BLOCK_LEVEL(txq->entries)) 254e948693eSPhilip Paeps return; 255e948693eSPhilip Paeps 256e948693eSPhilip Paeps txq->blocked = 1; 257e948693eSPhilip Paeps 258e948693eSPhilip Paeps /* 259e948693eSPhilip Paeps * Avoid a race with completion interrupt handling that could leave 260e948693eSPhilip Paeps * the queue blocked. 261e948693eSPhilip Paeps */ 262e948693eSPhilip Paeps mb(); 263e948693eSPhilip Paeps sfxge_tx_qreap(txq); 264e948693eSPhilip Paeps level = txq->added - txq->reaped; 265385b1d8eSGeorge V. Neville-Neil if (level < SFXGE_TXQ_BLOCK_LEVEL(txq->entries)) { 266e948693eSPhilip Paeps mb(); 267e948693eSPhilip Paeps txq->blocked = 0; 268e948693eSPhilip Paeps } 269e948693eSPhilip Paeps } 270e948693eSPhilip Paeps 271e948693eSPhilip Paeps static int sfxge_tx_queue_mbuf(struct sfxge_txq *txq, struct mbuf *mbuf) 272e948693eSPhilip Paeps { 273e948693eSPhilip Paeps bus_dmamap_t *used_map; 274e948693eSPhilip Paeps bus_dmamap_t map; 275e948693eSPhilip Paeps bus_dma_segment_t dma_seg[SFXGE_TX_MAPPING_MAX_SEG]; 276e948693eSPhilip Paeps unsigned int id; 277e948693eSPhilip Paeps struct sfxge_tx_mapping *stmp; 278e948693eSPhilip Paeps efx_buffer_t *desc; 279e948693eSPhilip Paeps int n_dma_seg; 280e948693eSPhilip Paeps int rc; 281e948693eSPhilip Paeps int i; 282e948693eSPhilip Paeps 283e948693eSPhilip Paeps KASSERT(!txq->blocked, ("txq->blocked")); 284e948693eSPhilip Paeps 285e948693eSPhilip Paeps if (mbuf->m_pkthdr.csum_flags & CSUM_TSO) 286e948693eSPhilip Paeps prefetch_read_many(mbuf->m_data); 287e948693eSPhilip Paeps 288e948693eSPhilip Paeps if (txq->init_state != SFXGE_TXQ_STARTED) { 289e948693eSPhilip Paeps rc = EINTR; 290e948693eSPhilip Paeps goto reject; 291e948693eSPhilip Paeps } 292e948693eSPhilip Paeps 293e948693eSPhilip Paeps /* Load the packet for DMA. */ 294385b1d8eSGeorge V. Neville-Neil id = txq->added & txq->ptr_mask; 295e948693eSPhilip Paeps stmp = &txq->stmp[id]; 296e948693eSPhilip Paeps rc = bus_dmamap_load_mbuf_sg(txq->packet_dma_tag, stmp->map, 297e948693eSPhilip Paeps mbuf, dma_seg, &n_dma_seg, 0); 298e948693eSPhilip Paeps if (rc == EFBIG) { 299e948693eSPhilip Paeps /* Try again. */ 300c6499eccSGleb Smirnoff struct mbuf *new_mbuf = m_collapse(mbuf, M_NOWAIT, 301e948693eSPhilip Paeps SFXGE_TX_MAPPING_MAX_SEG); 302e948693eSPhilip Paeps if (new_mbuf == NULL) 303e948693eSPhilip Paeps goto reject; 304e948693eSPhilip Paeps ++txq->collapses; 305e948693eSPhilip Paeps mbuf = new_mbuf; 306e948693eSPhilip Paeps rc = bus_dmamap_load_mbuf_sg(txq->packet_dma_tag, 307e948693eSPhilip Paeps stmp->map, mbuf, 308e948693eSPhilip Paeps dma_seg, &n_dma_seg, 0); 309e948693eSPhilip Paeps } 310e948693eSPhilip Paeps if (rc != 0) 311e948693eSPhilip Paeps goto reject; 312e948693eSPhilip Paeps 313e948693eSPhilip Paeps /* Make the packet visible to the hardware. */ 314e948693eSPhilip Paeps bus_dmamap_sync(txq->packet_dma_tag, stmp->map, BUS_DMASYNC_PREWRITE); 315e948693eSPhilip Paeps 316e948693eSPhilip Paeps used_map = &stmp->map; 317e948693eSPhilip Paeps 318e948693eSPhilip Paeps if (mbuf->m_pkthdr.csum_flags & CSUM_TSO) { 319e948693eSPhilip Paeps rc = sfxge_tx_queue_tso(txq, mbuf, dma_seg, n_dma_seg); 320e948693eSPhilip Paeps if (rc < 0) 321e948693eSPhilip Paeps goto reject_mapped; 322e948693eSPhilip Paeps stmp = &txq->stmp[rc]; 323e948693eSPhilip Paeps } else { 324e948693eSPhilip Paeps /* Add the mapping to the fragment list, and set flags 325e948693eSPhilip Paeps * for the buffer. 326e948693eSPhilip Paeps */ 327e948693eSPhilip Paeps i = 0; 328e948693eSPhilip Paeps for (;;) { 329e948693eSPhilip Paeps desc = &txq->pend_desc[i]; 330e948693eSPhilip Paeps desc->eb_addr = dma_seg[i].ds_addr; 331e948693eSPhilip Paeps desc->eb_size = dma_seg[i].ds_len; 332e948693eSPhilip Paeps if (i == n_dma_seg - 1) { 333e948693eSPhilip Paeps desc->eb_eop = 1; 334e948693eSPhilip Paeps break; 335e948693eSPhilip Paeps } 336e948693eSPhilip Paeps desc->eb_eop = 0; 337e948693eSPhilip Paeps i++; 338e948693eSPhilip Paeps 339e948693eSPhilip Paeps stmp->flags = 0; 340e948693eSPhilip Paeps if (__predict_false(stmp == 341385b1d8eSGeorge V. Neville-Neil &txq->stmp[txq->ptr_mask])) 342e948693eSPhilip Paeps stmp = &txq->stmp[0]; 343e948693eSPhilip Paeps else 344e948693eSPhilip Paeps stmp++; 345e948693eSPhilip Paeps } 346e948693eSPhilip Paeps txq->n_pend_desc = n_dma_seg; 347e948693eSPhilip Paeps } 348e948693eSPhilip Paeps 349e948693eSPhilip Paeps /* 350e948693eSPhilip Paeps * If the mapping required more than one descriptor 351e948693eSPhilip Paeps * then we need to associate the DMA map with the last 352e948693eSPhilip Paeps * descriptor, not the first. 353e948693eSPhilip Paeps */ 354e948693eSPhilip Paeps if (used_map != &stmp->map) { 355e948693eSPhilip Paeps map = stmp->map; 356e948693eSPhilip Paeps stmp->map = *used_map; 357e948693eSPhilip Paeps *used_map = map; 358e948693eSPhilip Paeps } 359e948693eSPhilip Paeps 360e948693eSPhilip Paeps stmp->u.mbuf = mbuf; 361e948693eSPhilip Paeps stmp->flags = TX_BUF_UNMAP | TX_BUF_MBUF; 362e948693eSPhilip Paeps 363e948693eSPhilip Paeps /* Post the fragment list. */ 364e948693eSPhilip Paeps sfxge_tx_qlist_post(txq); 365e948693eSPhilip Paeps 366b7b0edd1SGeorge V. Neville-Neil return (0); 367e948693eSPhilip Paeps 368e948693eSPhilip Paeps reject_mapped: 369e948693eSPhilip Paeps bus_dmamap_unload(txq->packet_dma_tag, *used_map); 370e948693eSPhilip Paeps reject: 371e948693eSPhilip Paeps /* Drop the packet on the floor. */ 372e948693eSPhilip Paeps m_freem(mbuf); 373e948693eSPhilip Paeps ++txq->drops; 374e948693eSPhilip Paeps 375b7b0edd1SGeorge V. Neville-Neil return (rc); 376e948693eSPhilip Paeps } 377e948693eSPhilip Paeps 378e948693eSPhilip Paeps #ifdef SFXGE_HAVE_MQ 379e948693eSPhilip Paeps 380e948693eSPhilip Paeps /* 381e948693eSPhilip Paeps * Drain the deferred packet list into the transmit queue. 382e948693eSPhilip Paeps */ 383e948693eSPhilip Paeps static void 384e948693eSPhilip Paeps sfxge_tx_qdpl_drain(struct sfxge_txq *txq) 385e948693eSPhilip Paeps { 386e948693eSPhilip Paeps struct sfxge_softc *sc; 387e948693eSPhilip Paeps struct sfxge_tx_dpl *stdp; 388e948693eSPhilip Paeps struct mbuf *mbuf, *next; 389e948693eSPhilip Paeps unsigned int count; 390e948693eSPhilip Paeps unsigned int pushed; 391e948693eSPhilip Paeps int rc; 392e948693eSPhilip Paeps 393e948693eSPhilip Paeps mtx_assert(&txq->lock, MA_OWNED); 394e948693eSPhilip Paeps 395e948693eSPhilip Paeps sc = txq->sc; 396e948693eSPhilip Paeps stdp = &txq->dpl; 397e948693eSPhilip Paeps pushed = txq->added; 398e948693eSPhilip Paeps 399e948693eSPhilip Paeps prefetch_read_many(sc->enp); 400e948693eSPhilip Paeps prefetch_read_many(txq->common); 401e948693eSPhilip Paeps 402e948693eSPhilip Paeps mbuf = stdp->std_get; 403bc85c897SGeorge V. Neville-Neil count = stdp->std_get_count; 404e948693eSPhilip Paeps 405e948693eSPhilip Paeps while (count != 0) { 406e948693eSPhilip Paeps KASSERT(mbuf != NULL, ("mbuf == NULL")); 407e948693eSPhilip Paeps 408e948693eSPhilip Paeps next = mbuf->m_nextpkt; 409e948693eSPhilip Paeps mbuf->m_nextpkt = NULL; 410e948693eSPhilip Paeps 411e948693eSPhilip Paeps ETHER_BPF_MTAP(sc->ifnet, mbuf); /* packet capture */ 412e948693eSPhilip Paeps 413e948693eSPhilip Paeps if (next != NULL) 414e948693eSPhilip Paeps prefetch_read_many(next); 415e948693eSPhilip Paeps 416e948693eSPhilip Paeps rc = sfxge_tx_queue_mbuf(txq, mbuf); 417e948693eSPhilip Paeps --count; 418e948693eSPhilip Paeps mbuf = next; 419e948693eSPhilip Paeps if (rc != 0) 420e948693eSPhilip Paeps continue; 421e948693eSPhilip Paeps 422e948693eSPhilip Paeps if (txq->blocked) 423e948693eSPhilip Paeps break; 424e948693eSPhilip Paeps 425e948693eSPhilip Paeps /* Push the fragments to the hardware in batches. */ 426e948693eSPhilip Paeps if (txq->added - pushed >= SFXGE_TX_BATCH) { 427e948693eSPhilip Paeps efx_tx_qpush(txq->common, txq->added); 428e948693eSPhilip Paeps pushed = txq->added; 429e948693eSPhilip Paeps } 430e948693eSPhilip Paeps } 431e948693eSPhilip Paeps 432e948693eSPhilip Paeps if (count == 0) { 433e948693eSPhilip Paeps KASSERT(mbuf == NULL, ("mbuf != NULL")); 434e948693eSPhilip Paeps stdp->std_get = NULL; 435bc85c897SGeorge V. Neville-Neil stdp->std_get_count = 0; 436e948693eSPhilip Paeps stdp->std_getp = &stdp->std_get; 437e948693eSPhilip Paeps } else { 438e948693eSPhilip Paeps stdp->std_get = mbuf; 439bc85c897SGeorge V. Neville-Neil stdp->std_get_count = count; 440e948693eSPhilip Paeps } 441e948693eSPhilip Paeps 442e948693eSPhilip Paeps if (txq->added != pushed) 443e948693eSPhilip Paeps efx_tx_qpush(txq->common, txq->added); 444e948693eSPhilip Paeps 445bc85c897SGeorge V. Neville-Neil KASSERT(txq->blocked || stdp->std_get_count == 0, 446e948693eSPhilip Paeps ("queue unblocked but count is non-zero")); 447e948693eSPhilip Paeps } 448e948693eSPhilip Paeps 449e948693eSPhilip Paeps #define SFXGE_TX_QDPL_PENDING(_txq) \ 450e948693eSPhilip Paeps ((_txq)->dpl.std_put != 0) 451e948693eSPhilip Paeps 452e948693eSPhilip Paeps /* 453e948693eSPhilip Paeps * Service the deferred packet list. 454e948693eSPhilip Paeps * 455e948693eSPhilip Paeps * NOTE: drops the txq mutex! 456e948693eSPhilip Paeps */ 457e948693eSPhilip Paeps static inline void 458e948693eSPhilip Paeps sfxge_tx_qdpl_service(struct sfxge_txq *txq) 459e948693eSPhilip Paeps { 460e948693eSPhilip Paeps mtx_assert(&txq->lock, MA_OWNED); 461e948693eSPhilip Paeps 462e948693eSPhilip Paeps do { 463e948693eSPhilip Paeps if (SFXGE_TX_QDPL_PENDING(txq)) 464e948693eSPhilip Paeps sfxge_tx_qdpl_swizzle(txq); 465e948693eSPhilip Paeps 466e948693eSPhilip Paeps if (!txq->blocked) 467e948693eSPhilip Paeps sfxge_tx_qdpl_drain(txq); 468e948693eSPhilip Paeps 469e948693eSPhilip Paeps mtx_unlock(&txq->lock); 470e948693eSPhilip Paeps } while (SFXGE_TX_QDPL_PENDING(txq) && 471e948693eSPhilip Paeps mtx_trylock(&txq->lock)); 472e948693eSPhilip Paeps } 473e948693eSPhilip Paeps 474e948693eSPhilip Paeps /* 475e948693eSPhilip Paeps * Put a packet on the deferred packet list. 476e948693eSPhilip Paeps * 477e948693eSPhilip Paeps * If we are called with the txq lock held, we put the packet on the "get 478e948693eSPhilip Paeps * list", otherwise we atomically push it on the "put list". The swizzle 479e948693eSPhilip Paeps * function takes care of ordering. 480e948693eSPhilip Paeps * 481e948693eSPhilip Paeps * The length of the put list is bounded by SFXGE_TX_MAX_DEFFERED. We 482e948693eSPhilip Paeps * overload the csum_data field in the mbuf to keep track of this length 483e948693eSPhilip Paeps * because there is no cheap alternative to avoid races. 484e948693eSPhilip Paeps */ 485e948693eSPhilip Paeps static inline int 486e948693eSPhilip Paeps sfxge_tx_qdpl_put(struct sfxge_txq *txq, struct mbuf *mbuf, int locked) 487e948693eSPhilip Paeps { 488e948693eSPhilip Paeps struct sfxge_tx_dpl *stdp; 489e948693eSPhilip Paeps 490e948693eSPhilip Paeps stdp = &txq->dpl; 491e948693eSPhilip Paeps 492e948693eSPhilip Paeps KASSERT(mbuf->m_nextpkt == NULL, ("mbuf->m_nextpkt != NULL")); 493e948693eSPhilip Paeps 494e948693eSPhilip Paeps if (locked) { 495e948693eSPhilip Paeps mtx_assert(&txq->lock, MA_OWNED); 496e948693eSPhilip Paeps 497e948693eSPhilip Paeps sfxge_tx_qdpl_swizzle(txq); 498e948693eSPhilip Paeps 499060a95efSGeorge V. Neville-Neil if (stdp->std_get_count >= stdp->std_get_max) 500c1974e29SGleb Smirnoff return (ENOBUFS); 501c1974e29SGleb Smirnoff 502e948693eSPhilip Paeps *(stdp->std_getp) = mbuf; 503e948693eSPhilip Paeps stdp->std_getp = &mbuf->m_nextpkt; 504bc85c897SGeorge V. Neville-Neil stdp->std_get_count++; 505e948693eSPhilip Paeps } else { 506e948693eSPhilip Paeps volatile uintptr_t *putp; 507e948693eSPhilip Paeps uintptr_t old; 508e948693eSPhilip Paeps uintptr_t new; 509e948693eSPhilip Paeps unsigned old_len; 510e948693eSPhilip Paeps 511e948693eSPhilip Paeps putp = &stdp->std_put; 512e948693eSPhilip Paeps new = (uintptr_t)mbuf; 513e948693eSPhilip Paeps 514e948693eSPhilip Paeps do { 515e948693eSPhilip Paeps old = *putp; 516b7b0edd1SGeorge V. Neville-Neil if (old != 0) { 517e948693eSPhilip Paeps struct mbuf *mp = (struct mbuf *)old; 518e948693eSPhilip Paeps old_len = mp->m_pkthdr.csum_data; 519e948693eSPhilip Paeps } else 520e948693eSPhilip Paeps old_len = 0; 521060a95efSGeorge V. Neville-Neil if (old_len >= stdp->std_put_max) 522c1974e29SGleb Smirnoff return (ENOBUFS); 523e948693eSPhilip Paeps mbuf->m_pkthdr.csum_data = old_len + 1; 524e948693eSPhilip Paeps mbuf->m_nextpkt = (void *)old; 525fb8ccc78SMarius Strobl } while (atomic_cmpset_ptr(putp, old, new) == 0); 526e948693eSPhilip Paeps } 527e948693eSPhilip Paeps 528e948693eSPhilip Paeps return (0); 529e948693eSPhilip Paeps } 530e948693eSPhilip Paeps 531e948693eSPhilip Paeps /* 532e948693eSPhilip Paeps * Called from if_transmit - will try to grab the txq lock and enqueue to the 533e948693eSPhilip Paeps * put list if it succeeds, otherwise will push onto the defer list. 534e948693eSPhilip Paeps */ 535e948693eSPhilip Paeps int 536e948693eSPhilip Paeps sfxge_tx_packet_add(struct sfxge_txq *txq, struct mbuf *m) 537e948693eSPhilip Paeps { 538e948693eSPhilip Paeps int locked; 539e948693eSPhilip Paeps int rc; 540e948693eSPhilip Paeps 541d7ac87d3SGleb Smirnoff if (!SFXGE_LINK_UP(txq->sc)) { 542d7ac87d3SGleb Smirnoff rc = ENETDOWN; 543d7ac87d3SGleb Smirnoff goto fail; 544d7ac87d3SGleb Smirnoff } 545d7ac87d3SGleb Smirnoff 546e948693eSPhilip Paeps /* 547e948693eSPhilip Paeps * Try to grab the txq lock. If we are able to get the lock, 548e948693eSPhilip Paeps * the packet will be appended to the "get list" of the deferred 549e948693eSPhilip Paeps * packet list. Otherwise, it will be pushed on the "put list". 550e948693eSPhilip Paeps */ 551e948693eSPhilip Paeps locked = mtx_trylock(&txq->lock); 552e948693eSPhilip Paeps 553e948693eSPhilip Paeps if (sfxge_tx_qdpl_put(txq, m, locked) != 0) { 554c1974e29SGleb Smirnoff if (locked) 555c1974e29SGleb Smirnoff mtx_unlock(&txq->lock); 556e948693eSPhilip Paeps rc = ENOBUFS; 557e948693eSPhilip Paeps goto fail; 558e948693eSPhilip Paeps } 559e948693eSPhilip Paeps 560e948693eSPhilip Paeps /* 561e948693eSPhilip Paeps * Try to grab the lock again. 562e948693eSPhilip Paeps * 563e948693eSPhilip Paeps * If we are able to get the lock, we need to process the deferred 564e948693eSPhilip Paeps * packet list. If we are not able to get the lock, another thread 565e948693eSPhilip Paeps * is processing the list. 566e948693eSPhilip Paeps */ 567e948693eSPhilip Paeps if (!locked) 568e948693eSPhilip Paeps locked = mtx_trylock(&txq->lock); 569e948693eSPhilip Paeps 570e948693eSPhilip Paeps if (locked) { 571e948693eSPhilip Paeps /* Try to service the list. */ 572e948693eSPhilip Paeps sfxge_tx_qdpl_service(txq); 573e948693eSPhilip Paeps /* Lock has been dropped. */ 574e948693eSPhilip Paeps } 575e948693eSPhilip Paeps 576e948693eSPhilip Paeps return (0); 577e948693eSPhilip Paeps 578e948693eSPhilip Paeps fail: 57910d0bdcaSGeorge V. Neville-Neil m_freem(m); 580d7ac87d3SGleb Smirnoff atomic_add_long(&txq->early_drops, 1); 581e948693eSPhilip Paeps return (rc); 582e948693eSPhilip Paeps } 583e948693eSPhilip Paeps 584e948693eSPhilip Paeps static void 585e948693eSPhilip Paeps sfxge_tx_qdpl_flush(struct sfxge_txq *txq) 586e948693eSPhilip Paeps { 587e948693eSPhilip Paeps struct sfxge_tx_dpl *stdp = &txq->dpl; 588e948693eSPhilip Paeps struct mbuf *mbuf, *next; 589e948693eSPhilip Paeps 590e948693eSPhilip Paeps mtx_lock(&txq->lock); 591e948693eSPhilip Paeps 592e948693eSPhilip Paeps sfxge_tx_qdpl_swizzle(txq); 593e948693eSPhilip Paeps for (mbuf = stdp->std_get; mbuf != NULL; mbuf = next) { 594e948693eSPhilip Paeps next = mbuf->m_nextpkt; 595e948693eSPhilip Paeps m_freem(mbuf); 596e948693eSPhilip Paeps } 597e948693eSPhilip Paeps stdp->std_get = NULL; 598bc85c897SGeorge V. Neville-Neil stdp->std_get_count = 0; 599e948693eSPhilip Paeps stdp->std_getp = &stdp->std_get; 600e948693eSPhilip Paeps 601e948693eSPhilip Paeps mtx_unlock(&txq->lock); 602e948693eSPhilip Paeps } 603e948693eSPhilip Paeps 604e948693eSPhilip Paeps void 605e948693eSPhilip Paeps sfxge_if_qflush(struct ifnet *ifp) 606e948693eSPhilip Paeps { 607e948693eSPhilip Paeps struct sfxge_softc *sc; 608e948693eSPhilip Paeps int i; 609e948693eSPhilip Paeps 610e948693eSPhilip Paeps sc = ifp->if_softc; 611e948693eSPhilip Paeps 612e948693eSPhilip Paeps for (i = 0; i < SFXGE_TX_SCALE(sc); i++) 613e948693eSPhilip Paeps sfxge_tx_qdpl_flush(sc->txq[i]); 614e948693eSPhilip Paeps } 615e948693eSPhilip Paeps 616e948693eSPhilip Paeps /* 617e948693eSPhilip Paeps * TX start -- called by the stack. 618e948693eSPhilip Paeps */ 619e948693eSPhilip Paeps int 620e948693eSPhilip Paeps sfxge_if_transmit(struct ifnet *ifp, struct mbuf *m) 621e948693eSPhilip Paeps { 622e948693eSPhilip Paeps struct sfxge_softc *sc; 623e948693eSPhilip Paeps struct sfxge_txq *txq; 624e948693eSPhilip Paeps int rc; 625e948693eSPhilip Paeps 626e948693eSPhilip Paeps sc = (struct sfxge_softc *)ifp->if_softc; 627e948693eSPhilip Paeps 628e948693eSPhilip Paeps KASSERT(ifp->if_flags & IFF_UP, ("interface not up")); 629e948693eSPhilip Paeps 630e948693eSPhilip Paeps /* Pick the desired transmit queue. */ 631e948693eSPhilip Paeps if (m->m_pkthdr.csum_flags & (CSUM_DELAY_DATA | CSUM_TSO)) { 632e948693eSPhilip Paeps int index = 0; 633e948693eSPhilip Paeps 634c2529042SHans Petter Selasky /* check if flowid is set */ 635c2529042SHans Petter Selasky if (M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) { 636e948693eSPhilip Paeps uint32_t hash = m->m_pkthdr.flowid; 637e948693eSPhilip Paeps 638e948693eSPhilip Paeps index = sc->rx_indir_table[hash % SFXGE_RX_SCALE_MAX]; 639e948693eSPhilip Paeps } 640e948693eSPhilip Paeps txq = sc->txq[SFXGE_TXQ_IP_TCP_UDP_CKSUM + index]; 641e948693eSPhilip Paeps } else if (m->m_pkthdr.csum_flags & CSUM_DELAY_IP) { 642e948693eSPhilip Paeps txq = sc->txq[SFXGE_TXQ_IP_CKSUM]; 643e948693eSPhilip Paeps } else { 644e948693eSPhilip Paeps txq = sc->txq[SFXGE_TXQ_NON_CKSUM]; 645e948693eSPhilip Paeps } 646e948693eSPhilip Paeps 647e948693eSPhilip Paeps rc = sfxge_tx_packet_add(txq, m); 648e948693eSPhilip Paeps 649e948693eSPhilip Paeps return (rc); 650e948693eSPhilip Paeps } 651e948693eSPhilip Paeps 652e948693eSPhilip Paeps #else /* !SFXGE_HAVE_MQ */ 653e948693eSPhilip Paeps 654e948693eSPhilip Paeps static void sfxge_if_start_locked(struct ifnet *ifp) 655e948693eSPhilip Paeps { 656e948693eSPhilip Paeps struct sfxge_softc *sc = ifp->if_softc; 657e948693eSPhilip Paeps struct sfxge_txq *txq; 658e948693eSPhilip Paeps struct mbuf *mbuf; 659e948693eSPhilip Paeps unsigned int pushed[SFXGE_TXQ_NTYPES]; 660e948693eSPhilip Paeps unsigned int q_index; 661e948693eSPhilip Paeps 662e948693eSPhilip Paeps if ((ifp->if_drv_flags & (IFF_DRV_RUNNING|IFF_DRV_OACTIVE)) != 663e948693eSPhilip Paeps IFF_DRV_RUNNING) 664e948693eSPhilip Paeps return; 665e948693eSPhilip Paeps 666e948693eSPhilip Paeps if (!sc->port.link_up) 667e948693eSPhilip Paeps return; 668e948693eSPhilip Paeps 669e948693eSPhilip Paeps for (q_index = 0; q_index < SFXGE_TXQ_NTYPES; q_index++) { 670e948693eSPhilip Paeps txq = sc->txq[q_index]; 671e948693eSPhilip Paeps pushed[q_index] = txq->added; 672e948693eSPhilip Paeps } 673e948693eSPhilip Paeps 674e948693eSPhilip Paeps while (!IFQ_DRV_IS_EMPTY(&ifp->if_snd)) { 675e948693eSPhilip Paeps IFQ_DRV_DEQUEUE(&ifp->if_snd, mbuf); 676e948693eSPhilip Paeps if (mbuf == NULL) 677e948693eSPhilip Paeps break; 678e948693eSPhilip Paeps 679e948693eSPhilip Paeps ETHER_BPF_MTAP(ifp, mbuf); /* packet capture */ 680e948693eSPhilip Paeps 681e948693eSPhilip Paeps /* Pick the desired transmit queue. */ 682e948693eSPhilip Paeps if (mbuf->m_pkthdr.csum_flags & (CSUM_DELAY_DATA | CSUM_TSO)) 683e948693eSPhilip Paeps q_index = SFXGE_TXQ_IP_TCP_UDP_CKSUM; 684e948693eSPhilip Paeps else if (mbuf->m_pkthdr.csum_flags & CSUM_DELAY_IP) 685e948693eSPhilip Paeps q_index = SFXGE_TXQ_IP_CKSUM; 686e948693eSPhilip Paeps else 687e948693eSPhilip Paeps q_index = SFXGE_TXQ_NON_CKSUM; 688e948693eSPhilip Paeps txq = sc->txq[q_index]; 689e948693eSPhilip Paeps 690e948693eSPhilip Paeps if (sfxge_tx_queue_mbuf(txq, mbuf) != 0) 691e948693eSPhilip Paeps continue; 692e948693eSPhilip Paeps 693e948693eSPhilip Paeps if (txq->blocked) { 694e948693eSPhilip Paeps ifp->if_drv_flags |= IFF_DRV_OACTIVE; 695e948693eSPhilip Paeps break; 696e948693eSPhilip Paeps } 697e948693eSPhilip Paeps 698e948693eSPhilip Paeps /* Push the fragments to the hardware in batches. */ 699e948693eSPhilip Paeps if (txq->added - pushed[q_index] >= SFXGE_TX_BATCH) { 700e948693eSPhilip Paeps efx_tx_qpush(txq->common, txq->added); 701e948693eSPhilip Paeps pushed[q_index] = txq->added; 702e948693eSPhilip Paeps } 703e948693eSPhilip Paeps } 704e948693eSPhilip Paeps 705e948693eSPhilip Paeps for (q_index = 0; q_index < SFXGE_TXQ_NTYPES; q_index++) { 706e948693eSPhilip Paeps txq = sc->txq[q_index]; 707e948693eSPhilip Paeps if (txq->added != pushed[q_index]) 708e948693eSPhilip Paeps efx_tx_qpush(txq->common, txq->added); 709e948693eSPhilip Paeps } 710e948693eSPhilip Paeps } 711e948693eSPhilip Paeps 712e948693eSPhilip Paeps void sfxge_if_start(struct ifnet *ifp) 713e948693eSPhilip Paeps { 714e948693eSPhilip Paeps struct sfxge_softc *sc = ifp->if_softc; 715e948693eSPhilip Paeps 716e948693eSPhilip Paeps mtx_lock(&sc->tx_lock); 717e948693eSPhilip Paeps sfxge_if_start_locked(ifp); 718e948693eSPhilip Paeps mtx_unlock(&sc->tx_lock); 719e948693eSPhilip Paeps } 720e948693eSPhilip Paeps 721e948693eSPhilip Paeps static inline void 722e948693eSPhilip Paeps sfxge_tx_qdpl_service(struct sfxge_txq *txq) 723e948693eSPhilip Paeps { 724e948693eSPhilip Paeps struct sfxge_softc *sc = txq->sc; 725e948693eSPhilip Paeps struct ifnet *ifp = sc->ifnet; 726e948693eSPhilip Paeps 727e948693eSPhilip Paeps mtx_assert(&sc->tx_lock, MA_OWNED); 728e948693eSPhilip Paeps ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 729e948693eSPhilip Paeps sfxge_if_start_locked(ifp); 730e948693eSPhilip Paeps mtx_unlock(&sc->tx_lock); 731e948693eSPhilip Paeps } 732e948693eSPhilip Paeps 733e948693eSPhilip Paeps #endif /* SFXGE_HAVE_MQ */ 734e948693eSPhilip Paeps 735e948693eSPhilip Paeps /* 736e948693eSPhilip Paeps * Software "TSO". Not quite as good as doing it in hardware, but 737e948693eSPhilip Paeps * still faster than segmenting in the stack. 738e948693eSPhilip Paeps */ 739e948693eSPhilip Paeps 740e948693eSPhilip Paeps struct sfxge_tso_state { 741e948693eSPhilip Paeps /* Output position */ 742e948693eSPhilip Paeps unsigned out_len; /* Remaining length in current segment */ 743e948693eSPhilip Paeps unsigned seqnum; /* Current sequence number */ 744e948693eSPhilip Paeps unsigned packet_space; /* Remaining space in current packet */ 745e948693eSPhilip Paeps 746e948693eSPhilip Paeps /* Input position */ 747e948693eSPhilip Paeps unsigned dma_seg_i; /* Current DMA segment number */ 748e948693eSPhilip Paeps uint64_t dma_addr; /* DMA address of current position */ 749e948693eSPhilip Paeps unsigned in_len; /* Remaining length in current mbuf */ 750e948693eSPhilip Paeps 751e948693eSPhilip Paeps const struct mbuf *mbuf; /* Input mbuf (head of chain) */ 752e948693eSPhilip Paeps u_short protocol; /* Network protocol (after VLAN decap) */ 753e948693eSPhilip Paeps ssize_t nh_off; /* Offset of network header */ 754e948693eSPhilip Paeps ssize_t tcph_off; /* Offset of TCP header */ 755e948693eSPhilip Paeps unsigned header_len; /* Number of bytes of header */ 756e948693eSPhilip Paeps int full_packet_size; /* Number of bytes to put in each outgoing 757e948693eSPhilip Paeps * segment */ 758e948693eSPhilip Paeps }; 759e948693eSPhilip Paeps 760e948693eSPhilip Paeps static inline const struct ip *tso_iph(const struct sfxge_tso_state *tso) 761e948693eSPhilip Paeps { 762e948693eSPhilip Paeps KASSERT(tso->protocol == htons(ETHERTYPE_IP), 763e948693eSPhilip Paeps ("tso_iph() in non-IPv4 state")); 764e948693eSPhilip Paeps return (const struct ip *)(tso->mbuf->m_data + tso->nh_off); 765e948693eSPhilip Paeps } 766e948693eSPhilip Paeps static inline const struct ip6_hdr *tso_ip6h(const struct sfxge_tso_state *tso) 767e948693eSPhilip Paeps { 768e948693eSPhilip Paeps KASSERT(tso->protocol == htons(ETHERTYPE_IPV6), 769e948693eSPhilip Paeps ("tso_ip6h() in non-IPv6 state")); 770e948693eSPhilip Paeps return (const struct ip6_hdr *)(tso->mbuf->m_data + tso->nh_off); 771e948693eSPhilip Paeps } 772e948693eSPhilip Paeps static inline const struct tcphdr *tso_tcph(const struct sfxge_tso_state *tso) 773e948693eSPhilip Paeps { 774e948693eSPhilip Paeps return (const struct tcphdr *)(tso->mbuf->m_data + tso->tcph_off); 775e948693eSPhilip Paeps } 776e948693eSPhilip Paeps 777e948693eSPhilip Paeps /* Size of preallocated TSO header buffers. Larger blocks must be 778e948693eSPhilip Paeps * allocated from the heap. 779e948693eSPhilip Paeps */ 780e948693eSPhilip Paeps #define TSOH_STD_SIZE 128 781e948693eSPhilip Paeps 782e948693eSPhilip Paeps /* At most half the descriptors in the queue at any time will refer to 783e948693eSPhilip Paeps * a TSO header buffer, since they must always be followed by a 784e948693eSPhilip Paeps * payload descriptor referring to an mbuf. 785e948693eSPhilip Paeps */ 786385b1d8eSGeorge V. Neville-Neil #define TSOH_COUNT(_txq_entries) ((_txq_entries) / 2u) 787e948693eSPhilip Paeps #define TSOH_PER_PAGE (PAGE_SIZE / TSOH_STD_SIZE) 788385b1d8eSGeorge V. Neville-Neil #define TSOH_PAGE_COUNT(_txq_entries) \ 789385b1d8eSGeorge V. Neville-Neil ((TSOH_COUNT(_txq_entries) + TSOH_PER_PAGE - 1) / TSOH_PER_PAGE) 790e948693eSPhilip Paeps 791e948693eSPhilip Paeps static int tso_init(struct sfxge_txq *txq) 792e948693eSPhilip Paeps { 793e948693eSPhilip Paeps struct sfxge_softc *sc = txq->sc; 794385b1d8eSGeorge V. Neville-Neil unsigned int tsoh_page_count = TSOH_PAGE_COUNT(sc->txq_entries); 795e948693eSPhilip Paeps int i, rc; 796e948693eSPhilip Paeps 797e948693eSPhilip Paeps /* Allocate TSO header buffers */ 798385b1d8eSGeorge V. Neville-Neil txq->tsoh_buffer = malloc(tsoh_page_count * sizeof(txq->tsoh_buffer[0]), 799e948693eSPhilip Paeps M_SFXGE, M_WAITOK); 800e948693eSPhilip Paeps 801385b1d8eSGeorge V. Neville-Neil for (i = 0; i < tsoh_page_count; i++) { 802e948693eSPhilip Paeps rc = sfxge_dma_alloc(sc, PAGE_SIZE, &txq->tsoh_buffer[i]); 803b7b0edd1SGeorge V. Neville-Neil if (rc != 0) 804e948693eSPhilip Paeps goto fail; 805e948693eSPhilip Paeps } 806e948693eSPhilip Paeps 807b7b0edd1SGeorge V. Neville-Neil return (0); 808e948693eSPhilip Paeps 809e948693eSPhilip Paeps fail: 810e948693eSPhilip Paeps while (i-- > 0) 811e948693eSPhilip Paeps sfxge_dma_free(&txq->tsoh_buffer[i]); 812e948693eSPhilip Paeps free(txq->tsoh_buffer, M_SFXGE); 813e948693eSPhilip Paeps txq->tsoh_buffer = NULL; 814b7b0edd1SGeorge V. Neville-Neil return (rc); 815e948693eSPhilip Paeps } 816e948693eSPhilip Paeps 817e948693eSPhilip Paeps static void tso_fini(struct sfxge_txq *txq) 818e948693eSPhilip Paeps { 819e948693eSPhilip Paeps int i; 820e948693eSPhilip Paeps 821b7b0edd1SGeorge V. Neville-Neil if (txq->tsoh_buffer != NULL) { 822385b1d8eSGeorge V. Neville-Neil for (i = 0; i < TSOH_PAGE_COUNT(txq->sc->txq_entries); i++) 823e948693eSPhilip Paeps sfxge_dma_free(&txq->tsoh_buffer[i]); 824e948693eSPhilip Paeps free(txq->tsoh_buffer, M_SFXGE); 825e948693eSPhilip Paeps } 826e948693eSPhilip Paeps } 827e948693eSPhilip Paeps 828e948693eSPhilip Paeps static void tso_start(struct sfxge_tso_state *tso, struct mbuf *mbuf) 829e948693eSPhilip Paeps { 830e948693eSPhilip Paeps struct ether_header *eh = mtod(mbuf, struct ether_header *); 831e948693eSPhilip Paeps 832e948693eSPhilip Paeps tso->mbuf = mbuf; 833e948693eSPhilip Paeps 834e948693eSPhilip Paeps /* Find network protocol and header */ 835e948693eSPhilip Paeps tso->protocol = eh->ether_type; 836e948693eSPhilip Paeps if (tso->protocol == htons(ETHERTYPE_VLAN)) { 837e948693eSPhilip Paeps struct ether_vlan_header *veh = 838e948693eSPhilip Paeps mtod(mbuf, struct ether_vlan_header *); 839e948693eSPhilip Paeps tso->protocol = veh->evl_proto; 840e948693eSPhilip Paeps tso->nh_off = sizeof(*veh); 841e948693eSPhilip Paeps } else { 842e948693eSPhilip Paeps tso->nh_off = sizeof(*eh); 843e948693eSPhilip Paeps } 844e948693eSPhilip Paeps 845e948693eSPhilip Paeps /* Find TCP header */ 846e948693eSPhilip Paeps if (tso->protocol == htons(ETHERTYPE_IP)) { 847e948693eSPhilip Paeps KASSERT(tso_iph(tso)->ip_p == IPPROTO_TCP, 848e948693eSPhilip Paeps ("TSO required on non-TCP packet")); 849e948693eSPhilip Paeps tso->tcph_off = tso->nh_off + 4 * tso_iph(tso)->ip_hl; 850e948693eSPhilip Paeps } else { 851e948693eSPhilip Paeps KASSERT(tso->protocol == htons(ETHERTYPE_IPV6), 852e948693eSPhilip Paeps ("TSO required on non-IP packet")); 853e948693eSPhilip Paeps KASSERT(tso_ip6h(tso)->ip6_nxt == IPPROTO_TCP, 854e948693eSPhilip Paeps ("TSO required on non-TCP packet")); 855e948693eSPhilip Paeps tso->tcph_off = tso->nh_off + sizeof(struct ip6_hdr); 856e948693eSPhilip Paeps } 857e948693eSPhilip Paeps 858e948693eSPhilip Paeps tso->header_len = tso->tcph_off + 4 * tso_tcph(tso)->th_off; 859e948693eSPhilip Paeps tso->full_packet_size = tso->header_len + mbuf->m_pkthdr.tso_segsz; 860e948693eSPhilip Paeps 861e948693eSPhilip Paeps tso->seqnum = ntohl(tso_tcph(tso)->th_seq); 862e948693eSPhilip Paeps 863e948693eSPhilip Paeps /* These flags must not be duplicated */ 864e948693eSPhilip Paeps KASSERT(!(tso_tcph(tso)->th_flags & (TH_URG | TH_SYN | TH_RST)), 865e948693eSPhilip Paeps ("incompatible TCP flag on TSO packet")); 866e948693eSPhilip Paeps 867e948693eSPhilip Paeps tso->out_len = mbuf->m_pkthdr.len - tso->header_len; 868e948693eSPhilip Paeps } 869e948693eSPhilip Paeps 870e948693eSPhilip Paeps /* 871e948693eSPhilip Paeps * tso_fill_packet_with_fragment - form descriptors for the current fragment 872e948693eSPhilip Paeps * 873e948693eSPhilip Paeps * Form descriptors for the current fragment, until we reach the end 874e948693eSPhilip Paeps * of fragment or end-of-packet. Return 0 on success, 1 if not enough 875e948693eSPhilip Paeps * space. 876e948693eSPhilip Paeps */ 877e948693eSPhilip Paeps static void tso_fill_packet_with_fragment(struct sfxge_txq *txq, 878e948693eSPhilip Paeps struct sfxge_tso_state *tso) 879e948693eSPhilip Paeps { 880e948693eSPhilip Paeps efx_buffer_t *desc; 881e948693eSPhilip Paeps int n; 882e948693eSPhilip Paeps 883e948693eSPhilip Paeps if (tso->in_len == 0 || tso->packet_space == 0) 884e948693eSPhilip Paeps return; 885e948693eSPhilip Paeps 886e948693eSPhilip Paeps KASSERT(tso->in_len > 0, ("TSO input length went negative")); 887e948693eSPhilip Paeps KASSERT(tso->packet_space > 0, ("TSO packet space went negative")); 888e948693eSPhilip Paeps 889e948693eSPhilip Paeps n = min(tso->in_len, tso->packet_space); 890e948693eSPhilip Paeps 891e948693eSPhilip Paeps tso->packet_space -= n; 892e948693eSPhilip Paeps tso->out_len -= n; 893e948693eSPhilip Paeps tso->in_len -= n; 894e948693eSPhilip Paeps 895e948693eSPhilip Paeps desc = &txq->pend_desc[txq->n_pend_desc++]; 896e948693eSPhilip Paeps desc->eb_addr = tso->dma_addr; 897e948693eSPhilip Paeps desc->eb_size = n; 898e948693eSPhilip Paeps desc->eb_eop = tso->out_len == 0 || tso->packet_space == 0; 899e948693eSPhilip Paeps 900e948693eSPhilip Paeps tso->dma_addr += n; 901e948693eSPhilip Paeps } 902e948693eSPhilip Paeps 903e948693eSPhilip Paeps /* Callback from bus_dmamap_load() for long TSO headers. */ 904e948693eSPhilip Paeps static void tso_map_long_header(void *dma_addr_ret, 905e948693eSPhilip Paeps bus_dma_segment_t *segs, int nseg, 906e948693eSPhilip Paeps int error) 907e948693eSPhilip Paeps { 908e948693eSPhilip Paeps *(uint64_t *)dma_addr_ret = ((__predict_true(error == 0) && 909e948693eSPhilip Paeps __predict_true(nseg == 1)) ? 910e948693eSPhilip Paeps segs->ds_addr : 0); 911e948693eSPhilip Paeps } 912e948693eSPhilip Paeps 913e948693eSPhilip Paeps /* 914e948693eSPhilip Paeps * tso_start_new_packet - generate a new header and prepare for the new packet 915e948693eSPhilip Paeps * 916e948693eSPhilip Paeps * Generate a new header and prepare for the new packet. Return 0 on 917e948693eSPhilip Paeps * success, or an error code if failed to alloc header. 918e948693eSPhilip Paeps */ 919e948693eSPhilip Paeps static int tso_start_new_packet(struct sfxge_txq *txq, 920e948693eSPhilip Paeps struct sfxge_tso_state *tso, 921e948693eSPhilip Paeps unsigned int id) 922e948693eSPhilip Paeps { 923e948693eSPhilip Paeps struct sfxge_tx_mapping *stmp = &txq->stmp[id]; 924e948693eSPhilip Paeps struct tcphdr *tsoh_th; 925e948693eSPhilip Paeps unsigned ip_length; 926e948693eSPhilip Paeps caddr_t header; 927e948693eSPhilip Paeps uint64_t dma_addr; 928e948693eSPhilip Paeps bus_dmamap_t map; 929e948693eSPhilip Paeps efx_buffer_t *desc; 930e948693eSPhilip Paeps int rc; 931e948693eSPhilip Paeps 932e948693eSPhilip Paeps /* Allocate a DMA-mapped header buffer. */ 933e948693eSPhilip Paeps if (__predict_true(tso->header_len <= TSOH_STD_SIZE)) { 934e948693eSPhilip Paeps unsigned int page_index = (id / 2) / TSOH_PER_PAGE; 935e948693eSPhilip Paeps unsigned int buf_index = (id / 2) % TSOH_PER_PAGE; 936e948693eSPhilip Paeps 937e948693eSPhilip Paeps header = (txq->tsoh_buffer[page_index].esm_base + 938e948693eSPhilip Paeps buf_index * TSOH_STD_SIZE); 939e948693eSPhilip Paeps dma_addr = (txq->tsoh_buffer[page_index].esm_addr + 940e948693eSPhilip Paeps buf_index * TSOH_STD_SIZE); 941e948693eSPhilip Paeps map = txq->tsoh_buffer[page_index].esm_map; 942e948693eSPhilip Paeps 943e948693eSPhilip Paeps stmp->flags = 0; 944e948693eSPhilip Paeps } else { 945e948693eSPhilip Paeps /* We cannot use bus_dmamem_alloc() as that may sleep */ 946e948693eSPhilip Paeps header = malloc(tso->header_len, M_SFXGE, M_NOWAIT); 947e948693eSPhilip Paeps if (__predict_false(!header)) 948b7b0edd1SGeorge V. Neville-Neil return (ENOMEM); 949e948693eSPhilip Paeps rc = bus_dmamap_load(txq->packet_dma_tag, stmp->map, 950e948693eSPhilip Paeps header, tso->header_len, 951e948693eSPhilip Paeps tso_map_long_header, &dma_addr, 952e948693eSPhilip Paeps BUS_DMA_NOWAIT); 953e948693eSPhilip Paeps if (__predict_false(dma_addr == 0)) { 954e948693eSPhilip Paeps if (rc == 0) { 955e948693eSPhilip Paeps /* Succeeded but got >1 segment */ 956e948693eSPhilip Paeps bus_dmamap_unload(txq->packet_dma_tag, 957e948693eSPhilip Paeps stmp->map); 958e948693eSPhilip Paeps rc = EINVAL; 959e948693eSPhilip Paeps } 960e948693eSPhilip Paeps free(header, M_SFXGE); 961b7b0edd1SGeorge V. Neville-Neil return (rc); 962e948693eSPhilip Paeps } 963e948693eSPhilip Paeps map = stmp->map; 964e948693eSPhilip Paeps 965e948693eSPhilip Paeps txq->tso_long_headers++; 966e948693eSPhilip Paeps stmp->u.heap_buf = header; 967e948693eSPhilip Paeps stmp->flags = TX_BUF_UNMAP; 968e948693eSPhilip Paeps } 969e948693eSPhilip Paeps 970e948693eSPhilip Paeps tsoh_th = (struct tcphdr *)(header + tso->tcph_off); 971e948693eSPhilip Paeps 972e948693eSPhilip Paeps /* Copy and update the headers. */ 973a35485aaSAndrew Rybchenko m_copydata(tso->mbuf, 0, tso->header_len, header); 974e948693eSPhilip Paeps 975e948693eSPhilip Paeps tsoh_th->th_seq = htonl(tso->seqnum); 976e948693eSPhilip Paeps tso->seqnum += tso->mbuf->m_pkthdr.tso_segsz; 977e948693eSPhilip Paeps if (tso->out_len > tso->mbuf->m_pkthdr.tso_segsz) { 978e948693eSPhilip Paeps /* This packet will not finish the TSO burst. */ 979e948693eSPhilip Paeps ip_length = tso->full_packet_size - tso->nh_off; 980e948693eSPhilip Paeps tsoh_th->th_flags &= ~(TH_FIN | TH_PUSH); 981e948693eSPhilip Paeps } else { 982e948693eSPhilip Paeps /* This packet will be the last in the TSO burst. */ 983e948693eSPhilip Paeps ip_length = tso->header_len - tso->nh_off + tso->out_len; 984e948693eSPhilip Paeps } 985e948693eSPhilip Paeps 986e948693eSPhilip Paeps if (tso->protocol == htons(ETHERTYPE_IP)) { 987e948693eSPhilip Paeps struct ip *tsoh_iph = (struct ip *)(header + tso->nh_off); 988e948693eSPhilip Paeps tsoh_iph->ip_len = htons(ip_length); 989e948693eSPhilip Paeps /* XXX We should increment ip_id, but FreeBSD doesn't 990e948693eSPhilip Paeps * currently allocate extra IDs for multiple segments. 991e948693eSPhilip Paeps */ 992e948693eSPhilip Paeps } else { 993e948693eSPhilip Paeps struct ip6_hdr *tsoh_iph = 994e948693eSPhilip Paeps (struct ip6_hdr *)(header + tso->nh_off); 995e948693eSPhilip Paeps tsoh_iph->ip6_plen = htons(ip_length - sizeof(*tsoh_iph)); 996e948693eSPhilip Paeps } 997e948693eSPhilip Paeps 998e948693eSPhilip Paeps /* Make the header visible to the hardware. */ 999e948693eSPhilip Paeps bus_dmamap_sync(txq->packet_dma_tag, map, BUS_DMASYNC_PREWRITE); 1000e948693eSPhilip Paeps 1001e948693eSPhilip Paeps tso->packet_space = tso->mbuf->m_pkthdr.tso_segsz; 1002e948693eSPhilip Paeps txq->tso_packets++; 1003e948693eSPhilip Paeps 1004e948693eSPhilip Paeps /* Form a descriptor for this header. */ 1005e948693eSPhilip Paeps desc = &txq->pend_desc[txq->n_pend_desc++]; 1006e948693eSPhilip Paeps desc->eb_addr = dma_addr; 1007e948693eSPhilip Paeps desc->eb_size = tso->header_len; 1008e948693eSPhilip Paeps desc->eb_eop = 0; 1009e948693eSPhilip Paeps 1010b7b0edd1SGeorge V. Neville-Neil return (0); 1011e948693eSPhilip Paeps } 1012e948693eSPhilip Paeps 1013e948693eSPhilip Paeps static int 1014e948693eSPhilip Paeps sfxge_tx_queue_tso(struct sfxge_txq *txq, struct mbuf *mbuf, 1015e948693eSPhilip Paeps const bus_dma_segment_t *dma_seg, int n_dma_seg) 1016e948693eSPhilip Paeps { 1017e948693eSPhilip Paeps struct sfxge_tso_state tso; 1018e948693eSPhilip Paeps unsigned int id, next_id; 1019a35485aaSAndrew Rybchenko unsigned skipped = 0; 1020e948693eSPhilip Paeps 1021e948693eSPhilip Paeps tso_start(&tso, mbuf); 1022e948693eSPhilip Paeps 1023a35485aaSAndrew Rybchenko while (dma_seg->ds_len + skipped <= tso.header_len) { 1024a35485aaSAndrew Rybchenko skipped += dma_seg->ds_len; 1025e948693eSPhilip Paeps --n_dma_seg; 1026e948693eSPhilip Paeps KASSERT(n_dma_seg, ("no payload found in TSO packet")); 1027e948693eSPhilip Paeps ++dma_seg; 1028e948693eSPhilip Paeps } 1029a35485aaSAndrew Rybchenko tso.in_len = dma_seg->ds_len + (tso.header_len - skipped); 1030a35485aaSAndrew Rybchenko tso.dma_addr = dma_seg->ds_addr + (tso.header_len - skipped); 1031e948693eSPhilip Paeps 1032385b1d8eSGeorge V. Neville-Neil id = txq->added & txq->ptr_mask; 1033e948693eSPhilip Paeps if (__predict_false(tso_start_new_packet(txq, &tso, id))) 1034385b1d8eSGeorge V. Neville-Neil return (-1); 1035e948693eSPhilip Paeps 1036e948693eSPhilip Paeps while (1) { 1037385b1d8eSGeorge V. Neville-Neil id = (id + 1) & txq->ptr_mask; 1038e948693eSPhilip Paeps tso_fill_packet_with_fragment(txq, &tso); 1039e948693eSPhilip Paeps 1040e948693eSPhilip Paeps /* Move onto the next fragment? */ 1041e948693eSPhilip Paeps if (tso.in_len == 0) { 1042e948693eSPhilip Paeps --n_dma_seg; 1043e948693eSPhilip Paeps if (n_dma_seg == 0) 1044e948693eSPhilip Paeps break; 1045e948693eSPhilip Paeps ++dma_seg; 1046e948693eSPhilip Paeps tso.in_len = dma_seg->ds_len; 1047e948693eSPhilip Paeps tso.dma_addr = dma_seg->ds_addr; 1048e948693eSPhilip Paeps } 1049e948693eSPhilip Paeps 1050e948693eSPhilip Paeps /* End of packet? */ 1051e948693eSPhilip Paeps if (tso.packet_space == 0) { 1052e948693eSPhilip Paeps /* If the queue is now full due to tiny MSS, 1053e948693eSPhilip Paeps * or we can't create another header, discard 1054e948693eSPhilip Paeps * the remainder of the input mbuf but do not 1055e948693eSPhilip Paeps * roll back the work we have done. 1056e948693eSPhilip Paeps */ 1057e948693eSPhilip Paeps if (txq->n_pend_desc > 1058e948693eSPhilip Paeps SFXGE_TSO_MAX_DESC - (1 + SFXGE_TX_MAPPING_MAX_SEG)) 1059e948693eSPhilip Paeps break; 1060385b1d8eSGeorge V. Neville-Neil next_id = (id + 1) & txq->ptr_mask; 1061e948693eSPhilip Paeps if (__predict_false(tso_start_new_packet(txq, &tso, 1062e948693eSPhilip Paeps next_id))) 1063e948693eSPhilip Paeps break; 1064e948693eSPhilip Paeps id = next_id; 1065e948693eSPhilip Paeps } 1066e948693eSPhilip Paeps } 1067e948693eSPhilip Paeps 1068e948693eSPhilip Paeps txq->tso_bursts++; 1069b7b0edd1SGeorge V. Neville-Neil return (id); 1070e948693eSPhilip Paeps } 1071e948693eSPhilip Paeps 1072e948693eSPhilip Paeps static void 1073e948693eSPhilip Paeps sfxge_tx_qunblock(struct sfxge_txq *txq) 1074e948693eSPhilip Paeps { 1075e948693eSPhilip Paeps struct sfxge_softc *sc; 1076e948693eSPhilip Paeps struct sfxge_evq *evq; 1077e948693eSPhilip Paeps 1078e948693eSPhilip Paeps sc = txq->sc; 1079e948693eSPhilip Paeps evq = sc->evq[txq->evq_index]; 1080e948693eSPhilip Paeps 1081e948693eSPhilip Paeps mtx_assert(&evq->lock, MA_OWNED); 1082e948693eSPhilip Paeps 1083e948693eSPhilip Paeps if (txq->init_state != SFXGE_TXQ_STARTED) 1084e948693eSPhilip Paeps return; 1085e948693eSPhilip Paeps 1086e948693eSPhilip Paeps mtx_lock(SFXGE_TXQ_LOCK(txq)); 1087e948693eSPhilip Paeps 1088e948693eSPhilip Paeps if (txq->blocked) { 1089e948693eSPhilip Paeps unsigned int level; 1090e948693eSPhilip Paeps 1091e948693eSPhilip Paeps level = txq->added - txq->completed; 1092385b1d8eSGeorge V. Neville-Neil if (level <= SFXGE_TXQ_UNBLOCK_LEVEL(txq->entries)) 1093e948693eSPhilip Paeps txq->blocked = 0; 1094e948693eSPhilip Paeps } 1095e948693eSPhilip Paeps 1096e948693eSPhilip Paeps sfxge_tx_qdpl_service(txq); 1097e948693eSPhilip Paeps /* note: lock has been dropped */ 1098e948693eSPhilip Paeps } 1099e948693eSPhilip Paeps 1100e948693eSPhilip Paeps void 1101e948693eSPhilip Paeps sfxge_tx_qflush_done(struct sfxge_txq *txq) 1102e948693eSPhilip Paeps { 1103e948693eSPhilip Paeps 1104e948693eSPhilip Paeps txq->flush_state = SFXGE_FLUSH_DONE; 1105e948693eSPhilip Paeps } 1106e948693eSPhilip Paeps 1107e948693eSPhilip Paeps static void 1108e948693eSPhilip Paeps sfxge_tx_qstop(struct sfxge_softc *sc, unsigned int index) 1109e948693eSPhilip Paeps { 1110e948693eSPhilip Paeps struct sfxge_txq *txq; 1111e948693eSPhilip Paeps struct sfxge_evq *evq; 1112e948693eSPhilip Paeps unsigned int count; 1113e948693eSPhilip Paeps 1114e948693eSPhilip Paeps txq = sc->txq[index]; 1115e948693eSPhilip Paeps evq = sc->evq[txq->evq_index]; 1116e948693eSPhilip Paeps 1117e948693eSPhilip Paeps mtx_lock(SFXGE_TXQ_LOCK(txq)); 1118e948693eSPhilip Paeps 1119e948693eSPhilip Paeps KASSERT(txq->init_state == SFXGE_TXQ_STARTED, 1120e948693eSPhilip Paeps ("txq->init_state != SFXGE_TXQ_STARTED")); 1121e948693eSPhilip Paeps 1122e948693eSPhilip Paeps txq->init_state = SFXGE_TXQ_INITIALIZED; 1123e948693eSPhilip Paeps txq->flush_state = SFXGE_FLUSH_PENDING; 1124e948693eSPhilip Paeps 1125e948693eSPhilip Paeps /* Flush the transmit queue. */ 1126e948693eSPhilip Paeps efx_tx_qflush(txq->common); 1127e948693eSPhilip Paeps 1128e948693eSPhilip Paeps mtx_unlock(SFXGE_TXQ_LOCK(txq)); 1129e948693eSPhilip Paeps 1130e948693eSPhilip Paeps count = 0; 1131e948693eSPhilip Paeps do { 1132e948693eSPhilip Paeps /* Spin for 100ms. */ 1133e948693eSPhilip Paeps DELAY(100000); 1134e948693eSPhilip Paeps 1135e948693eSPhilip Paeps if (txq->flush_state != SFXGE_FLUSH_PENDING) 1136e948693eSPhilip Paeps break; 1137e948693eSPhilip Paeps } while (++count < 20); 1138e948693eSPhilip Paeps 1139e948693eSPhilip Paeps mtx_lock(&evq->lock); 1140e948693eSPhilip Paeps mtx_lock(SFXGE_TXQ_LOCK(txq)); 1141e948693eSPhilip Paeps 1142e948693eSPhilip Paeps KASSERT(txq->flush_state != SFXGE_FLUSH_FAILED, 1143e948693eSPhilip Paeps ("txq->flush_state == SFXGE_FLUSH_FAILED")); 1144e948693eSPhilip Paeps 1145e948693eSPhilip Paeps txq->flush_state = SFXGE_FLUSH_DONE; 1146e948693eSPhilip Paeps 1147e948693eSPhilip Paeps txq->blocked = 0; 1148e948693eSPhilip Paeps txq->pending = txq->added; 1149e948693eSPhilip Paeps 1150e948693eSPhilip Paeps sfxge_tx_qcomplete(txq); 1151e948693eSPhilip Paeps KASSERT(txq->completed == txq->added, 1152e948693eSPhilip Paeps ("txq->completed != txq->added")); 1153e948693eSPhilip Paeps 1154e948693eSPhilip Paeps sfxge_tx_qreap(txq); 1155e948693eSPhilip Paeps KASSERT(txq->reaped == txq->completed, 1156e948693eSPhilip Paeps ("txq->reaped != txq->completed")); 1157e948693eSPhilip Paeps 1158e948693eSPhilip Paeps txq->added = 0; 1159e948693eSPhilip Paeps txq->pending = 0; 1160e948693eSPhilip Paeps txq->completed = 0; 1161e948693eSPhilip Paeps txq->reaped = 0; 1162e948693eSPhilip Paeps 1163e948693eSPhilip Paeps /* Destroy the common code transmit queue. */ 1164e948693eSPhilip Paeps efx_tx_qdestroy(txq->common); 1165e948693eSPhilip Paeps txq->common = NULL; 1166e948693eSPhilip Paeps 1167e948693eSPhilip Paeps efx_sram_buf_tbl_clear(sc->enp, txq->buf_base_id, 1168385b1d8eSGeorge V. Neville-Neil EFX_TXQ_NBUFS(sc->txq_entries)); 1169e948693eSPhilip Paeps 1170e948693eSPhilip Paeps mtx_unlock(&evq->lock); 1171e948693eSPhilip Paeps mtx_unlock(SFXGE_TXQ_LOCK(txq)); 1172e948693eSPhilip Paeps } 1173e948693eSPhilip Paeps 1174e948693eSPhilip Paeps static int 1175e948693eSPhilip Paeps sfxge_tx_qstart(struct sfxge_softc *sc, unsigned int index) 1176e948693eSPhilip Paeps { 1177e948693eSPhilip Paeps struct sfxge_txq *txq; 1178e948693eSPhilip Paeps efsys_mem_t *esmp; 1179e948693eSPhilip Paeps uint16_t flags; 1180e948693eSPhilip Paeps struct sfxge_evq *evq; 1181e948693eSPhilip Paeps int rc; 1182e948693eSPhilip Paeps 1183e948693eSPhilip Paeps txq = sc->txq[index]; 1184e948693eSPhilip Paeps esmp = &txq->mem; 1185e948693eSPhilip Paeps evq = sc->evq[txq->evq_index]; 1186e948693eSPhilip Paeps 1187e948693eSPhilip Paeps KASSERT(txq->init_state == SFXGE_TXQ_INITIALIZED, 1188e948693eSPhilip Paeps ("txq->init_state != SFXGE_TXQ_INITIALIZED")); 1189e948693eSPhilip Paeps KASSERT(evq->init_state == SFXGE_EVQ_STARTED, 1190e948693eSPhilip Paeps ("evq->init_state != SFXGE_EVQ_STARTED")); 1191e948693eSPhilip Paeps 1192e948693eSPhilip Paeps /* Program the buffer table. */ 1193e948693eSPhilip Paeps if ((rc = efx_sram_buf_tbl_set(sc->enp, txq->buf_base_id, esmp, 1194385b1d8eSGeorge V. Neville-Neil EFX_TXQ_NBUFS(sc->txq_entries))) != 0) 1195385b1d8eSGeorge V. Neville-Neil return (rc); 1196e948693eSPhilip Paeps 1197e948693eSPhilip Paeps /* Determine the kind of queue we are creating. */ 1198e948693eSPhilip Paeps switch (txq->type) { 1199e948693eSPhilip Paeps case SFXGE_TXQ_NON_CKSUM: 1200e948693eSPhilip Paeps flags = 0; 1201e948693eSPhilip Paeps break; 1202e948693eSPhilip Paeps case SFXGE_TXQ_IP_CKSUM: 1203e948693eSPhilip Paeps flags = EFX_CKSUM_IPV4; 1204e948693eSPhilip Paeps break; 1205e948693eSPhilip Paeps case SFXGE_TXQ_IP_TCP_UDP_CKSUM: 1206e948693eSPhilip Paeps flags = EFX_CKSUM_IPV4 | EFX_CKSUM_TCPUDP; 1207e948693eSPhilip Paeps break; 1208e948693eSPhilip Paeps default: 1209e948693eSPhilip Paeps KASSERT(0, ("Impossible TX queue")); 1210e948693eSPhilip Paeps flags = 0; 1211e948693eSPhilip Paeps break; 1212e948693eSPhilip Paeps } 1213e948693eSPhilip Paeps 1214e948693eSPhilip Paeps /* Create the common code transmit queue. */ 1215cf07c70dSGeorge V. Neville-Neil if ((rc = efx_tx_qcreate(sc->enp, index, txq->type, esmp, 1216385b1d8eSGeorge V. Neville-Neil sc->txq_entries, txq->buf_base_id, flags, evq->common, 1217e948693eSPhilip Paeps &txq->common)) != 0) 1218e948693eSPhilip Paeps goto fail; 1219e948693eSPhilip Paeps 1220e948693eSPhilip Paeps mtx_lock(SFXGE_TXQ_LOCK(txq)); 1221e948693eSPhilip Paeps 1222e948693eSPhilip Paeps /* Enable the transmit queue. */ 1223e948693eSPhilip Paeps efx_tx_qenable(txq->common); 1224e948693eSPhilip Paeps 1225e948693eSPhilip Paeps txq->init_state = SFXGE_TXQ_STARTED; 1226e948693eSPhilip Paeps 1227e948693eSPhilip Paeps mtx_unlock(SFXGE_TXQ_LOCK(txq)); 1228e948693eSPhilip Paeps 1229e948693eSPhilip Paeps return (0); 1230e948693eSPhilip Paeps 1231e948693eSPhilip Paeps fail: 1232e948693eSPhilip Paeps efx_sram_buf_tbl_clear(sc->enp, txq->buf_base_id, 1233385b1d8eSGeorge V. Neville-Neil EFX_TXQ_NBUFS(sc->txq_entries)); 1234385b1d8eSGeorge V. Neville-Neil return (rc); 1235e948693eSPhilip Paeps } 1236e948693eSPhilip Paeps 1237e948693eSPhilip Paeps void 1238e948693eSPhilip Paeps sfxge_tx_stop(struct sfxge_softc *sc) 1239e948693eSPhilip Paeps { 1240e948693eSPhilip Paeps const efx_nic_cfg_t *encp; 1241e948693eSPhilip Paeps int index; 1242e948693eSPhilip Paeps 1243e948693eSPhilip Paeps index = SFXGE_TX_SCALE(sc); 1244e948693eSPhilip Paeps while (--index >= 0) 1245e948693eSPhilip Paeps sfxge_tx_qstop(sc, SFXGE_TXQ_IP_TCP_UDP_CKSUM + index); 1246e948693eSPhilip Paeps 1247e948693eSPhilip Paeps sfxge_tx_qstop(sc, SFXGE_TXQ_IP_CKSUM); 1248e948693eSPhilip Paeps 1249e948693eSPhilip Paeps encp = efx_nic_cfg_get(sc->enp); 1250e948693eSPhilip Paeps sfxge_tx_qstop(sc, SFXGE_TXQ_NON_CKSUM); 1251e948693eSPhilip Paeps 1252e948693eSPhilip Paeps /* Tear down the transmit module */ 1253e948693eSPhilip Paeps efx_tx_fini(sc->enp); 1254e948693eSPhilip Paeps } 1255e948693eSPhilip Paeps 1256e948693eSPhilip Paeps int 1257e948693eSPhilip Paeps sfxge_tx_start(struct sfxge_softc *sc) 1258e948693eSPhilip Paeps { 1259e948693eSPhilip Paeps int index; 1260e948693eSPhilip Paeps int rc; 1261e948693eSPhilip Paeps 1262e948693eSPhilip Paeps /* Initialize the common code transmit module. */ 1263e948693eSPhilip Paeps if ((rc = efx_tx_init(sc->enp)) != 0) 1264e948693eSPhilip Paeps return (rc); 1265e948693eSPhilip Paeps 1266e948693eSPhilip Paeps if ((rc = sfxge_tx_qstart(sc, SFXGE_TXQ_NON_CKSUM)) != 0) 1267e948693eSPhilip Paeps goto fail; 1268e948693eSPhilip Paeps 1269e948693eSPhilip Paeps if ((rc = sfxge_tx_qstart(sc, SFXGE_TXQ_IP_CKSUM)) != 0) 1270e948693eSPhilip Paeps goto fail2; 1271e948693eSPhilip Paeps 1272e948693eSPhilip Paeps for (index = 0; index < SFXGE_TX_SCALE(sc); index++) { 1273e948693eSPhilip Paeps if ((rc = sfxge_tx_qstart(sc, SFXGE_TXQ_IP_TCP_UDP_CKSUM + 1274e948693eSPhilip Paeps index)) != 0) 1275e948693eSPhilip Paeps goto fail3; 1276e948693eSPhilip Paeps } 1277e948693eSPhilip Paeps 1278e948693eSPhilip Paeps return (0); 1279e948693eSPhilip Paeps 1280e948693eSPhilip Paeps fail3: 1281e948693eSPhilip Paeps while (--index >= 0) 1282e948693eSPhilip Paeps sfxge_tx_qstop(sc, SFXGE_TXQ_IP_TCP_UDP_CKSUM + index); 1283e948693eSPhilip Paeps 1284e948693eSPhilip Paeps sfxge_tx_qstop(sc, SFXGE_TXQ_IP_CKSUM); 1285e948693eSPhilip Paeps 1286e948693eSPhilip Paeps fail2: 1287e948693eSPhilip Paeps sfxge_tx_qstop(sc, SFXGE_TXQ_NON_CKSUM); 1288e948693eSPhilip Paeps 1289e948693eSPhilip Paeps fail: 1290e948693eSPhilip Paeps efx_tx_fini(sc->enp); 1291e948693eSPhilip Paeps 1292e948693eSPhilip Paeps return (rc); 1293e948693eSPhilip Paeps } 1294e948693eSPhilip Paeps 1295e948693eSPhilip Paeps /** 1296e948693eSPhilip Paeps * Destroy a transmit queue. 1297e948693eSPhilip Paeps */ 1298e948693eSPhilip Paeps static void 1299e948693eSPhilip Paeps sfxge_tx_qfini(struct sfxge_softc *sc, unsigned int index) 1300e948693eSPhilip Paeps { 1301e948693eSPhilip Paeps struct sfxge_txq *txq; 1302385b1d8eSGeorge V. Neville-Neil unsigned int nmaps; 1303e948693eSPhilip Paeps 1304e948693eSPhilip Paeps txq = sc->txq[index]; 1305e948693eSPhilip Paeps 1306e948693eSPhilip Paeps KASSERT(txq->init_state == SFXGE_TXQ_INITIALIZED, 1307e948693eSPhilip Paeps ("txq->init_state != SFXGE_TXQ_INITIALIZED")); 1308e948693eSPhilip Paeps 1309e948693eSPhilip Paeps if (txq->type == SFXGE_TXQ_IP_TCP_UDP_CKSUM) 1310e948693eSPhilip Paeps tso_fini(txq); 1311e948693eSPhilip Paeps 1312e948693eSPhilip Paeps /* Free the context arrays. */ 1313e948693eSPhilip Paeps free(txq->pend_desc, M_SFXGE); 1314385b1d8eSGeorge V. Neville-Neil nmaps = sc->txq_entries; 1315b7b0edd1SGeorge V. Neville-Neil while (nmaps-- != 0) 1316e948693eSPhilip Paeps bus_dmamap_destroy(txq->packet_dma_tag, txq->stmp[nmaps].map); 1317e948693eSPhilip Paeps free(txq->stmp, M_SFXGE); 1318e948693eSPhilip Paeps 1319e948693eSPhilip Paeps /* Release DMA memory mapping. */ 1320e948693eSPhilip Paeps sfxge_dma_free(&txq->mem); 1321e948693eSPhilip Paeps 1322e948693eSPhilip Paeps sc->txq[index] = NULL; 1323e948693eSPhilip Paeps 1324e948693eSPhilip Paeps #ifdef SFXGE_HAVE_MQ 1325e948693eSPhilip Paeps mtx_destroy(&txq->lock); 1326e948693eSPhilip Paeps #endif 1327e948693eSPhilip Paeps 1328e948693eSPhilip Paeps free(txq, M_SFXGE); 1329e948693eSPhilip Paeps } 1330e948693eSPhilip Paeps 1331e948693eSPhilip Paeps static int 1332e948693eSPhilip Paeps sfxge_tx_qinit(struct sfxge_softc *sc, unsigned int txq_index, 1333e948693eSPhilip Paeps enum sfxge_txq_type type, unsigned int evq_index) 1334e948693eSPhilip Paeps { 1335bc85c897SGeorge V. Neville-Neil char name[16]; 1336bc85c897SGeorge V. Neville-Neil struct sysctl_oid *txq_node; 1337e948693eSPhilip Paeps struct sfxge_txq *txq; 1338e948693eSPhilip Paeps struct sfxge_evq *evq; 1339e948693eSPhilip Paeps #ifdef SFXGE_HAVE_MQ 1340e948693eSPhilip Paeps struct sfxge_tx_dpl *stdp; 1341e948693eSPhilip Paeps #endif 1342e948693eSPhilip Paeps efsys_mem_t *esmp; 1343e948693eSPhilip Paeps unsigned int nmaps; 1344e948693eSPhilip Paeps int rc; 1345e948693eSPhilip Paeps 1346e948693eSPhilip Paeps txq = malloc(sizeof(struct sfxge_txq), M_SFXGE, M_ZERO | M_WAITOK); 1347e948693eSPhilip Paeps txq->sc = sc; 1348385b1d8eSGeorge V. Neville-Neil txq->entries = sc->txq_entries; 1349385b1d8eSGeorge V. Neville-Neil txq->ptr_mask = txq->entries - 1; 1350e948693eSPhilip Paeps 1351e948693eSPhilip Paeps sc->txq[txq_index] = txq; 1352e948693eSPhilip Paeps esmp = &txq->mem; 1353e948693eSPhilip Paeps 1354e948693eSPhilip Paeps evq = sc->evq[evq_index]; 1355e948693eSPhilip Paeps 1356e948693eSPhilip Paeps /* Allocate and zero DMA space for the descriptor ring. */ 1357385b1d8eSGeorge V. Neville-Neil if ((rc = sfxge_dma_alloc(sc, EFX_TXQ_SIZE(sc->txq_entries), esmp)) != 0) 1358e948693eSPhilip Paeps return (rc); 1359385b1d8eSGeorge V. Neville-Neil (void)memset(esmp->esm_base, 0, EFX_TXQ_SIZE(sc->txq_entries)); 1360e948693eSPhilip Paeps 1361e948693eSPhilip Paeps /* Allocate buffer table entries. */ 1362385b1d8eSGeorge V. Neville-Neil sfxge_sram_buf_tbl_alloc(sc, EFX_TXQ_NBUFS(sc->txq_entries), 1363e948693eSPhilip Paeps &txq->buf_base_id); 1364e948693eSPhilip Paeps 1365e948693eSPhilip Paeps /* Create a DMA tag for packet mappings. */ 1366fb8ccc78SMarius Strobl if (bus_dma_tag_create(sc->parent_dma_tag, 1, 0x1000, 1367fb8ccc78SMarius Strobl MIN(0x3FFFFFFFFFFFUL, BUS_SPACE_MAXADDR), BUS_SPACE_MAXADDR, NULL, 1368fb8ccc78SMarius Strobl NULL, 0x11000, SFXGE_TX_MAPPING_MAX_SEG, 0x1000, 0, NULL, NULL, 1369e948693eSPhilip Paeps &txq->packet_dma_tag) != 0) { 1370e948693eSPhilip Paeps device_printf(sc->dev, "Couldn't allocate txq DMA tag\n"); 1371e948693eSPhilip Paeps rc = ENOMEM; 1372e948693eSPhilip Paeps goto fail; 1373e948693eSPhilip Paeps } 1374e948693eSPhilip Paeps 1375e948693eSPhilip Paeps /* Allocate pending descriptor array for batching writes. */ 1376385b1d8eSGeorge V. Neville-Neil txq->pend_desc = malloc(sizeof(efx_buffer_t) * sc->txq_entries, 1377e948693eSPhilip Paeps M_SFXGE, M_ZERO | M_WAITOK); 1378e948693eSPhilip Paeps 1379e948693eSPhilip Paeps /* Allocate and initialise mbuf DMA mapping array. */ 1380385b1d8eSGeorge V. Neville-Neil txq->stmp = malloc(sizeof(struct sfxge_tx_mapping) * sc->txq_entries, 1381e948693eSPhilip Paeps M_SFXGE, M_ZERO | M_WAITOK); 1382385b1d8eSGeorge V. Neville-Neil for (nmaps = 0; nmaps < sc->txq_entries; nmaps++) { 1383e948693eSPhilip Paeps rc = bus_dmamap_create(txq->packet_dma_tag, 0, 1384e948693eSPhilip Paeps &txq->stmp[nmaps].map); 1385e948693eSPhilip Paeps if (rc != 0) 1386e948693eSPhilip Paeps goto fail2; 1387e948693eSPhilip Paeps } 1388e948693eSPhilip Paeps 1389bc85c897SGeorge V. Neville-Neil snprintf(name, sizeof(name), "%u", txq_index); 1390bc85c897SGeorge V. Neville-Neil txq_node = SYSCTL_ADD_NODE( 1391bc85c897SGeorge V. Neville-Neil device_get_sysctl_ctx(sc->dev), 1392bc85c897SGeorge V. Neville-Neil SYSCTL_CHILDREN(sc->txqs_node), 1393bc85c897SGeorge V. Neville-Neil OID_AUTO, name, CTLFLAG_RD, NULL, ""); 1394bc85c897SGeorge V. Neville-Neil if (txq_node == NULL) { 1395bc85c897SGeorge V. Neville-Neil rc = ENOMEM; 1396bc85c897SGeorge V. Neville-Neil goto fail_txq_node; 1397bc85c897SGeorge V. Neville-Neil } 1398bc85c897SGeorge V. Neville-Neil 1399e948693eSPhilip Paeps if (type == SFXGE_TXQ_IP_TCP_UDP_CKSUM && 1400e948693eSPhilip Paeps (rc = tso_init(txq)) != 0) 1401e948693eSPhilip Paeps goto fail3; 1402e948693eSPhilip Paeps 1403e948693eSPhilip Paeps #ifdef SFXGE_HAVE_MQ 1404060a95efSGeorge V. Neville-Neil if (sfxge_tx_dpl_get_max <= 0) { 1405060a95efSGeorge V. Neville-Neil log(LOG_ERR, "%s=%d must be greater than 0", 1406060a95efSGeorge V. Neville-Neil SFXGE_PARAM_TX_DPL_GET_MAX, sfxge_tx_dpl_get_max); 1407060a95efSGeorge V. Neville-Neil rc = EINVAL; 1408060a95efSGeorge V. Neville-Neil goto fail_tx_dpl_get_max; 1409060a95efSGeorge V. Neville-Neil } 1410060a95efSGeorge V. Neville-Neil if (sfxge_tx_dpl_put_max < 0) { 1411060a95efSGeorge V. Neville-Neil log(LOG_ERR, "%s=%d must be greater or equal to 0", 1412060a95efSGeorge V. Neville-Neil SFXGE_PARAM_TX_DPL_PUT_MAX, sfxge_tx_dpl_put_max); 1413060a95efSGeorge V. Neville-Neil rc = EINVAL; 1414060a95efSGeorge V. Neville-Neil goto fail_tx_dpl_put_max; 1415060a95efSGeorge V. Neville-Neil } 1416060a95efSGeorge V. Neville-Neil 1417e948693eSPhilip Paeps /* Initialize the deferred packet list. */ 1418e948693eSPhilip Paeps stdp = &txq->dpl; 1419060a95efSGeorge V. Neville-Neil stdp->std_put_max = sfxge_tx_dpl_put_max; 1420060a95efSGeorge V. Neville-Neil stdp->std_get_max = sfxge_tx_dpl_get_max; 1421e948693eSPhilip Paeps stdp->std_getp = &stdp->std_get; 1422e948693eSPhilip Paeps 1423e948693eSPhilip Paeps mtx_init(&txq->lock, "txq", NULL, MTX_DEF); 1424bc85c897SGeorge V. Neville-Neil 1425bc85c897SGeorge V. Neville-Neil SYSCTL_ADD_UINT(device_get_sysctl_ctx(sc->dev), 1426bc85c897SGeorge V. Neville-Neil SYSCTL_CHILDREN(txq_node), OID_AUTO, 1427bc85c897SGeorge V. Neville-Neil "dpl_get_count", CTLFLAG_RD | CTLFLAG_STATS, 1428bc85c897SGeorge V. Neville-Neil &stdp->std_get_count, 0, ""); 1429e948693eSPhilip Paeps #endif 1430e948693eSPhilip Paeps 1431e948693eSPhilip Paeps txq->type = type; 1432e948693eSPhilip Paeps txq->evq_index = evq_index; 1433e948693eSPhilip Paeps txq->txq_index = txq_index; 1434e948693eSPhilip Paeps txq->init_state = SFXGE_TXQ_INITIALIZED; 1435e948693eSPhilip Paeps 1436e948693eSPhilip Paeps return (0); 1437e948693eSPhilip Paeps 1438060a95efSGeorge V. Neville-Neil fail_tx_dpl_put_max: 1439060a95efSGeorge V. Neville-Neil fail_tx_dpl_get_max: 1440e948693eSPhilip Paeps fail3: 1441bc85c897SGeorge V. Neville-Neil fail_txq_node: 1442e948693eSPhilip Paeps free(txq->pend_desc, M_SFXGE); 1443e948693eSPhilip Paeps fail2: 1444b7b0edd1SGeorge V. Neville-Neil while (nmaps-- != 0) 1445e948693eSPhilip Paeps bus_dmamap_destroy(txq->packet_dma_tag, txq->stmp[nmaps].map); 1446e948693eSPhilip Paeps free(txq->stmp, M_SFXGE); 1447e948693eSPhilip Paeps bus_dma_tag_destroy(txq->packet_dma_tag); 1448e948693eSPhilip Paeps 1449e948693eSPhilip Paeps fail: 1450e948693eSPhilip Paeps sfxge_dma_free(esmp); 1451e948693eSPhilip Paeps 1452e948693eSPhilip Paeps return (rc); 1453e948693eSPhilip Paeps } 1454e948693eSPhilip Paeps 1455e948693eSPhilip Paeps static const struct { 1456e948693eSPhilip Paeps const char *name; 1457e948693eSPhilip Paeps size_t offset; 1458e948693eSPhilip Paeps } sfxge_tx_stats[] = { 1459e948693eSPhilip Paeps #define SFXGE_TX_STAT(name, member) \ 1460e948693eSPhilip Paeps { #name, offsetof(struct sfxge_txq, member) } 1461e948693eSPhilip Paeps SFXGE_TX_STAT(tso_bursts, tso_bursts), 1462e948693eSPhilip Paeps SFXGE_TX_STAT(tso_packets, tso_packets), 1463e948693eSPhilip Paeps SFXGE_TX_STAT(tso_long_headers, tso_long_headers), 1464e948693eSPhilip Paeps SFXGE_TX_STAT(tx_collapses, collapses), 1465e948693eSPhilip Paeps SFXGE_TX_STAT(tx_drops, drops), 1466d7ac87d3SGleb Smirnoff SFXGE_TX_STAT(tx_early_drops, early_drops), 1467e948693eSPhilip Paeps }; 1468e948693eSPhilip Paeps 1469e948693eSPhilip Paeps static int 1470e948693eSPhilip Paeps sfxge_tx_stat_handler(SYSCTL_HANDLER_ARGS) 1471e948693eSPhilip Paeps { 1472e948693eSPhilip Paeps struct sfxge_softc *sc = arg1; 1473e948693eSPhilip Paeps unsigned int id = arg2; 1474e948693eSPhilip Paeps unsigned long sum; 1475e948693eSPhilip Paeps unsigned int index; 1476e948693eSPhilip Paeps 1477e948693eSPhilip Paeps /* Sum across all TX queues */ 1478e948693eSPhilip Paeps sum = 0; 1479e948693eSPhilip Paeps for (index = 0; 1480e948693eSPhilip Paeps index < SFXGE_TXQ_IP_TCP_UDP_CKSUM + SFXGE_TX_SCALE(sc); 1481e948693eSPhilip Paeps index++) 1482e948693eSPhilip Paeps sum += *(unsigned long *)((caddr_t)sc->txq[index] + 1483e948693eSPhilip Paeps sfxge_tx_stats[id].offset); 1484e948693eSPhilip Paeps 1485b7b0edd1SGeorge V. Neville-Neil return (SYSCTL_OUT(req, &sum, sizeof(sum))); 1486e948693eSPhilip Paeps } 1487e948693eSPhilip Paeps 1488e948693eSPhilip Paeps static void 1489e948693eSPhilip Paeps sfxge_tx_stat_init(struct sfxge_softc *sc) 1490e948693eSPhilip Paeps { 1491e948693eSPhilip Paeps struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(sc->dev); 1492e948693eSPhilip Paeps struct sysctl_oid_list *stat_list; 1493e948693eSPhilip Paeps unsigned int id; 1494e948693eSPhilip Paeps 1495e948693eSPhilip Paeps stat_list = SYSCTL_CHILDREN(sc->stats_node); 1496e948693eSPhilip Paeps 1497e948693eSPhilip Paeps for (id = 0; 1498e948693eSPhilip Paeps id < sizeof(sfxge_tx_stats) / sizeof(sfxge_tx_stats[0]); 1499e948693eSPhilip Paeps id++) { 1500e948693eSPhilip Paeps SYSCTL_ADD_PROC( 1501e948693eSPhilip Paeps ctx, stat_list, 1502e948693eSPhilip Paeps OID_AUTO, sfxge_tx_stats[id].name, 1503e948693eSPhilip Paeps CTLTYPE_ULONG|CTLFLAG_RD, 1504e948693eSPhilip Paeps sc, id, sfxge_tx_stat_handler, "LU", 1505e948693eSPhilip Paeps ""); 1506e948693eSPhilip Paeps } 1507e948693eSPhilip Paeps } 1508e948693eSPhilip Paeps 1509e948693eSPhilip Paeps void 1510e948693eSPhilip Paeps sfxge_tx_fini(struct sfxge_softc *sc) 1511e948693eSPhilip Paeps { 1512e948693eSPhilip Paeps int index; 1513e948693eSPhilip Paeps 1514e948693eSPhilip Paeps index = SFXGE_TX_SCALE(sc); 1515e948693eSPhilip Paeps while (--index >= 0) 1516e948693eSPhilip Paeps sfxge_tx_qfini(sc, SFXGE_TXQ_IP_TCP_UDP_CKSUM + index); 1517e948693eSPhilip Paeps 1518e948693eSPhilip Paeps sfxge_tx_qfini(sc, SFXGE_TXQ_IP_CKSUM); 1519e948693eSPhilip Paeps sfxge_tx_qfini(sc, SFXGE_TXQ_NON_CKSUM); 1520e948693eSPhilip Paeps } 1521e948693eSPhilip Paeps 1522e948693eSPhilip Paeps 1523e948693eSPhilip Paeps int 1524e948693eSPhilip Paeps sfxge_tx_init(struct sfxge_softc *sc) 1525e948693eSPhilip Paeps { 1526e948693eSPhilip Paeps struct sfxge_intr *intr; 1527e948693eSPhilip Paeps int index; 1528e948693eSPhilip Paeps int rc; 1529e948693eSPhilip Paeps 1530e948693eSPhilip Paeps intr = &sc->intr; 1531e948693eSPhilip Paeps 1532e948693eSPhilip Paeps KASSERT(intr->state == SFXGE_INTR_INITIALIZED, 1533e948693eSPhilip Paeps ("intr->state != SFXGE_INTR_INITIALIZED")); 1534e948693eSPhilip Paeps 1535bc85c897SGeorge V. Neville-Neil sc->txqs_node = SYSCTL_ADD_NODE( 1536bc85c897SGeorge V. Neville-Neil device_get_sysctl_ctx(sc->dev), 1537bc85c897SGeorge V. Neville-Neil SYSCTL_CHILDREN(device_get_sysctl_tree(sc->dev)), 1538bc85c897SGeorge V. Neville-Neil OID_AUTO, "txq", CTLFLAG_RD, NULL, "Tx queues"); 1539bc85c897SGeorge V. Neville-Neil if (sc->txqs_node == NULL) { 1540bc85c897SGeorge V. Neville-Neil rc = ENOMEM; 1541bc85c897SGeorge V. Neville-Neil goto fail_txq_node; 1542bc85c897SGeorge V. Neville-Neil } 1543bc85c897SGeorge V. Neville-Neil 1544e948693eSPhilip Paeps /* Initialize the transmit queues */ 1545e948693eSPhilip Paeps if ((rc = sfxge_tx_qinit(sc, SFXGE_TXQ_NON_CKSUM, 1546e948693eSPhilip Paeps SFXGE_TXQ_NON_CKSUM, 0)) != 0) 1547e948693eSPhilip Paeps goto fail; 1548e948693eSPhilip Paeps 1549e948693eSPhilip Paeps if ((rc = sfxge_tx_qinit(sc, SFXGE_TXQ_IP_CKSUM, 1550e948693eSPhilip Paeps SFXGE_TXQ_IP_CKSUM, 0)) != 0) 1551e948693eSPhilip Paeps goto fail2; 1552e948693eSPhilip Paeps 1553e948693eSPhilip Paeps for (index = 0; index < SFXGE_TX_SCALE(sc); index++) { 1554e948693eSPhilip Paeps if ((rc = sfxge_tx_qinit(sc, SFXGE_TXQ_IP_TCP_UDP_CKSUM + index, 1555e948693eSPhilip Paeps SFXGE_TXQ_IP_TCP_UDP_CKSUM, index)) != 0) 1556e948693eSPhilip Paeps goto fail3; 1557e948693eSPhilip Paeps } 1558e948693eSPhilip Paeps 1559e948693eSPhilip Paeps sfxge_tx_stat_init(sc); 1560e948693eSPhilip Paeps 1561e948693eSPhilip Paeps return (0); 1562e948693eSPhilip Paeps 1563e948693eSPhilip Paeps fail3: 1564e948693eSPhilip Paeps sfxge_tx_qfini(sc, SFXGE_TXQ_IP_CKSUM); 1565e948693eSPhilip Paeps 1566e948693eSPhilip Paeps while (--index >= 0) 1567e948693eSPhilip Paeps sfxge_tx_qfini(sc, SFXGE_TXQ_IP_TCP_UDP_CKSUM + index); 1568e948693eSPhilip Paeps 1569e948693eSPhilip Paeps fail2: 1570e948693eSPhilip Paeps sfxge_tx_qfini(sc, SFXGE_TXQ_NON_CKSUM); 1571e948693eSPhilip Paeps 1572e948693eSPhilip Paeps fail: 1573bc85c897SGeorge V. Neville-Neil fail_txq_node: 1574e948693eSPhilip Paeps return (rc); 1575e948693eSPhilip Paeps } 1576