1e47937d1SCarl Delsey /*- 2e47937d1SCarl Delsey * Copyright (C) 2013 Intel Corporation 3e47937d1SCarl Delsey * All rights reserved. 4e47937d1SCarl Delsey * 5e47937d1SCarl Delsey * Redistribution and use in source and binary forms, with or without 6e47937d1SCarl Delsey * modification, are permitted provided that the following conditions 7e47937d1SCarl Delsey * are met: 8e47937d1SCarl Delsey * 1. Redistributions of source code must retain the above copyright 9e47937d1SCarl Delsey * notice, this list of conditions and the following disclaimer. 10e47937d1SCarl Delsey * 2. Redistributions in binary form must reproduce the above copyright 11e47937d1SCarl Delsey * notice, this list of conditions and the following disclaimer in the 12e47937d1SCarl Delsey * documentation and/or other materials provided with the distribution. 13e47937d1SCarl Delsey * 14e47937d1SCarl Delsey * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15e47937d1SCarl Delsey * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16e47937d1SCarl Delsey * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17e47937d1SCarl Delsey * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18e47937d1SCarl Delsey * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19e47937d1SCarl Delsey * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20e47937d1SCarl Delsey * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21e47937d1SCarl Delsey * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22e47937d1SCarl Delsey * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23e47937d1SCarl Delsey * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24e47937d1SCarl Delsey * SUCH DAMAGE. 25e47937d1SCarl Delsey */ 26e47937d1SCarl Delsey 27e47937d1SCarl Delsey #include <sys/cdefs.h> 28e47937d1SCarl Delsey __FBSDID("$FreeBSD$"); 29e47937d1SCarl Delsey 30e47937d1SCarl Delsey #include <sys/param.h> 31e47937d1SCarl Delsey #include <sys/kernel.h> 32e47937d1SCarl Delsey #include <sys/systm.h> 33e47937d1SCarl Delsey #include <sys/bus.h> 34e47937d1SCarl Delsey #include <sys/ktr.h> 35e47937d1SCarl Delsey #include <sys/lock.h> 36e47937d1SCarl Delsey #include <sys/malloc.h> 37e47937d1SCarl Delsey #include <sys/module.h> 38e47937d1SCarl Delsey #include <sys/mutex.h> 39e47937d1SCarl Delsey #include <sys/queue.h> 40e47937d1SCarl Delsey #include <sys/socket.h> 41e47937d1SCarl Delsey #include <sys/sockio.h> 42e47937d1SCarl Delsey #include <sys/taskqueue.h> 43e47937d1SCarl Delsey #include <net/if.h> 44e47937d1SCarl Delsey #include <net/if_media.h> 45e47937d1SCarl Delsey #include <net/if_types.h> 46e47937d1SCarl Delsey #include <net/if_var.h> 47e47937d1SCarl Delsey #include <net/bpf.h> 48e47937d1SCarl Delsey #include <net/ethernet.h> 49e47937d1SCarl Delsey #include <vm/vm.h> 50e47937d1SCarl Delsey #include <vm/pmap.h> 51e47937d1SCarl Delsey #include <machine/bus.h> 52e47937d1SCarl Delsey #include <machine/cpufunc.h> 53e47937d1SCarl Delsey #include <machine/pmap.h> 54e47937d1SCarl Delsey 55e47937d1SCarl Delsey #include "../ntb_hw/ntb_hw.h" 56e47937d1SCarl Delsey 57e47937d1SCarl Delsey /* 58e47937d1SCarl Delsey * The Non-Transparent Bridge (NTB) is a device on some Intel processors that 59e47937d1SCarl Delsey * allows you to connect two systems using a PCI-e link. 60e47937d1SCarl Delsey * 61e47937d1SCarl Delsey * This module contains a protocol for sending and receiving messages, and 62e47937d1SCarl Delsey * exposes that protocol through a simulated ethernet device called ntb. 63e47937d1SCarl Delsey * 64e47937d1SCarl Delsey * NOTE: Much of the code in this module is shared with Linux. Any patches may 65e47937d1SCarl Delsey * be picked up and redistributed in Linux with a dual GPL/BSD license. 66e47937d1SCarl Delsey */ 67e47937d1SCarl Delsey 68e47937d1SCarl Delsey /* TODO: These functions should really be part of the kernel */ 69e47937d1SCarl Delsey #define test_bit(pos, bitmap_addr) (*(bitmap_addr) & 1UL << (pos)) 70e47937d1SCarl Delsey #define set_bit(pos, bitmap_addr) *(bitmap_addr) |= 1UL << (pos) 71e47937d1SCarl Delsey #define clear_bit(pos, bitmap_addr) *(bitmap_addr) &= ~(1UL << (pos)) 72e47937d1SCarl Delsey 73e47937d1SCarl Delsey #define KTR_NTB KTR_SPARE3 74e47937d1SCarl Delsey 75e47937d1SCarl Delsey #define NTB_TRANSPORT_VERSION 3 76e47937d1SCarl Delsey #define NTB_RX_MAX_PKTS 64 77e47937d1SCarl Delsey #define NTB_RXQ_SIZE 300 78e47937d1SCarl Delsey 79e47937d1SCarl Delsey static unsigned int transport_mtu = 0x4000 + ETHER_HDR_LEN + ETHER_CRC_LEN; 80e47937d1SCarl Delsey static unsigned int max_num_clients = 1; 81e47937d1SCarl Delsey 82e47937d1SCarl Delsey STAILQ_HEAD(ntb_queue_list, ntb_queue_entry); 83e47937d1SCarl Delsey 84e47937d1SCarl Delsey struct ntb_queue_entry { 85e47937d1SCarl Delsey /* ntb_queue list reference */ 86e47937d1SCarl Delsey STAILQ_ENTRY(ntb_queue_entry) entry; 87e47937d1SCarl Delsey 88e47937d1SCarl Delsey /* info on data to be transfered */ 89e47937d1SCarl Delsey void *cb_data; 90e47937d1SCarl Delsey void *buf; 91e47937d1SCarl Delsey uint64_t len; 92e47937d1SCarl Delsey uint64_t flags; 93e47937d1SCarl Delsey }; 94e47937d1SCarl Delsey 95e47937d1SCarl Delsey struct ntb_rx_info { 96e47937d1SCarl Delsey unsigned int entry; 97e47937d1SCarl Delsey }; 98e47937d1SCarl Delsey 99e47937d1SCarl Delsey struct ntb_transport_qp { 100e47937d1SCarl Delsey struct ntb_netdev *transport; 101e47937d1SCarl Delsey struct ntb_softc *ntb; 102e47937d1SCarl Delsey 103e47937d1SCarl Delsey void *cb_data; 104e47937d1SCarl Delsey 105e47937d1SCarl Delsey bool client_ready; 106e47937d1SCarl Delsey bool qp_link; 107e47937d1SCarl Delsey uint8_t qp_num; /* Only 64 QP's are allowed. 0-63 */ 108e47937d1SCarl Delsey 109e47937d1SCarl Delsey struct ntb_rx_info *rx_info; 110e47937d1SCarl Delsey struct ntb_rx_info *remote_rx_info; 111e47937d1SCarl Delsey 112e47937d1SCarl Delsey void (*tx_handler) (struct ntb_transport_qp *qp, void *qp_data, 113e47937d1SCarl Delsey void *data, int len); 114e47937d1SCarl Delsey struct ntb_queue_list tx_free_q; 115e47937d1SCarl Delsey struct mtx ntb_tx_free_q_lock; 116e47937d1SCarl Delsey void *tx_mw; 117e47937d1SCarl Delsey uint64_t tx_index; 118e47937d1SCarl Delsey uint64_t tx_max_entry; 119e47937d1SCarl Delsey uint64_t tx_max_frame; 120e47937d1SCarl Delsey 121e47937d1SCarl Delsey void (*rx_handler) (struct ntb_transport_qp *qp, void *qp_data, 122e47937d1SCarl Delsey void *data, int len); 123e47937d1SCarl Delsey struct ntb_queue_list rx_pend_q; 124e47937d1SCarl Delsey struct ntb_queue_list rx_free_q; 125e47937d1SCarl Delsey struct mtx ntb_rx_pend_q_lock; 126e47937d1SCarl Delsey struct mtx ntb_rx_free_q_lock; 127e47937d1SCarl Delsey struct task rx_completion_task; 128e47937d1SCarl Delsey void *rx_buff; 129e47937d1SCarl Delsey uint64_t rx_index; 130e47937d1SCarl Delsey uint64_t rx_max_entry; 131e47937d1SCarl Delsey uint64_t rx_max_frame; 132e47937d1SCarl Delsey 133e47937d1SCarl Delsey void (*event_handler) (void *data, int status); 134e47937d1SCarl Delsey struct callout link_work; 135e47937d1SCarl Delsey struct callout queue_full; 136e47937d1SCarl Delsey struct callout rx_full; 137e47937d1SCarl Delsey 138e47937d1SCarl Delsey uint64_t last_rx_no_buf; 139e47937d1SCarl Delsey 140e47937d1SCarl Delsey /* Stats */ 141e47937d1SCarl Delsey uint64_t rx_bytes; 142e47937d1SCarl Delsey uint64_t rx_pkts; 143e47937d1SCarl Delsey uint64_t rx_ring_empty; 144e47937d1SCarl Delsey uint64_t rx_err_no_buf; 145e47937d1SCarl Delsey uint64_t rx_err_oflow; 146e47937d1SCarl Delsey uint64_t rx_err_ver; 147e47937d1SCarl Delsey uint64_t tx_bytes; 148e47937d1SCarl Delsey uint64_t tx_pkts; 149e47937d1SCarl Delsey uint64_t tx_ring_full; 150e47937d1SCarl Delsey }; 151e47937d1SCarl Delsey 152e47937d1SCarl Delsey struct ntb_queue_handlers { 153e47937d1SCarl Delsey void (*rx_handler) (struct ntb_transport_qp *qp, void *qp_data, 154e47937d1SCarl Delsey void *data, int len); 155e47937d1SCarl Delsey void (*tx_handler) (struct ntb_transport_qp *qp, void *qp_data, 156e47937d1SCarl Delsey void *data, int len); 157e47937d1SCarl Delsey void (*event_handler) (void *data, int status); 158e47937d1SCarl Delsey }; 159e47937d1SCarl Delsey 160e47937d1SCarl Delsey 161e47937d1SCarl Delsey struct ntb_transport_mw { 162e47937d1SCarl Delsey size_t size; 163e47937d1SCarl Delsey void *virt_addr; 164e47937d1SCarl Delsey vm_paddr_t dma_addr; 165e47937d1SCarl Delsey }; 166e47937d1SCarl Delsey 167e47937d1SCarl Delsey struct ntb_netdev { 168e47937d1SCarl Delsey struct ntb_softc *ntb; 169e47937d1SCarl Delsey struct ifnet *ifp; 170e47937d1SCarl Delsey struct ntb_transport_mw mw[NTB_NUM_MW]; 171e47937d1SCarl Delsey struct ntb_transport_qp *qps; 172e47937d1SCarl Delsey uint64_t max_qps; 173e47937d1SCarl Delsey uint64_t qp_bitmap; 174e47937d1SCarl Delsey bool transport_link; 175e47937d1SCarl Delsey struct callout link_work; 176e47937d1SCarl Delsey struct ntb_transport_qp *qp; 177e47937d1SCarl Delsey uint64_t bufsize; 178e47937d1SCarl Delsey u_char eaddr[ETHER_ADDR_LEN]; 179e47937d1SCarl Delsey struct mtx tx_lock; 180e47937d1SCarl Delsey struct mtx rx_lock; 181e47937d1SCarl Delsey }; 182e47937d1SCarl Delsey 183e47937d1SCarl Delsey static struct ntb_netdev net_softc; 184e47937d1SCarl Delsey 185e47937d1SCarl Delsey enum { 186e47937d1SCarl Delsey IF_NTB_DESC_DONE_FLAG = 1 << 0, 187e47937d1SCarl Delsey IF_NTB_LINK_DOWN_FLAG = 1 << 1, 188e47937d1SCarl Delsey }; 189e47937d1SCarl Delsey 190e47937d1SCarl Delsey struct ntb_payload_header { 191e47937d1SCarl Delsey uint64_t ver; 192e47937d1SCarl Delsey uint64_t len; 193e47937d1SCarl Delsey uint64_t flags; 194e47937d1SCarl Delsey }; 195e47937d1SCarl Delsey 196e47937d1SCarl Delsey enum { 197e47937d1SCarl Delsey IF_NTB_VERSION = 0, 198e47937d1SCarl Delsey IF_NTB_MW0_SZ, 199e47937d1SCarl Delsey IF_NTB_MW1_SZ, 200e47937d1SCarl Delsey IF_NTB_NUM_QPS, 201e47937d1SCarl Delsey IF_NTB_QP_LINKS, 202e47937d1SCarl Delsey IF_NTB_MAX_SPAD, 203e47937d1SCarl Delsey }; 204e47937d1SCarl Delsey 205e47937d1SCarl Delsey #define QP_TO_MW(qp) ((qp) % NTB_NUM_MW) 206e47937d1SCarl Delsey #define NTB_QP_DEF_NUM_ENTRIES 100 207e47937d1SCarl Delsey #define NTB_LINK_DOWN_TIMEOUT 10 208e47937d1SCarl Delsey 209e47937d1SCarl Delsey static int ntb_handle_module_events(struct module *m, int what, void *arg); 210e47937d1SCarl Delsey static int ntb_setup_interface(void); 211e47937d1SCarl Delsey static int ntb_teardown_interface(void); 212e47937d1SCarl Delsey static void ntb_net_init(void *arg); 213e47937d1SCarl Delsey static int ntb_ioctl(struct ifnet *ifp, u_long command, caddr_t data); 214e47937d1SCarl Delsey static void ntb_start(struct ifnet *ifp); 215e47937d1SCarl Delsey static void ntb_net_tx_handler(struct ntb_transport_qp *qp, void *qp_data, 216e47937d1SCarl Delsey void *data, int len); 217e47937d1SCarl Delsey static void ntb_net_rx_handler(struct ntb_transport_qp *qp, void *qp_data, 218e47937d1SCarl Delsey void *data, int len); 219e47937d1SCarl Delsey static void ntb_net_event_handler(void *data, int status); 220e47937d1SCarl Delsey static int ntb_transport_init(struct ntb_softc *ntb); 221e47937d1SCarl Delsey static void ntb_transport_free(void *transport); 222e47937d1SCarl Delsey static void ntb_transport_init_queue(struct ntb_netdev *nt, 223e47937d1SCarl Delsey unsigned int qp_num); 224e47937d1SCarl Delsey static void ntb_transport_free_queue(struct ntb_transport_qp *qp); 225e47937d1SCarl Delsey static struct ntb_transport_qp * ntb_transport_create_queue(void *data, 226e47937d1SCarl Delsey struct ntb_softc *pdev, const struct ntb_queue_handlers *handlers); 227e47937d1SCarl Delsey static void ntb_transport_link_up(struct ntb_transport_qp *qp); 228e47937d1SCarl Delsey static int ntb_transport_tx_enqueue(struct ntb_transport_qp *qp, void *cb, 229e47937d1SCarl Delsey void *data, unsigned int len); 230e47937d1SCarl Delsey static int ntb_process_tx(struct ntb_transport_qp *qp, 231e47937d1SCarl Delsey struct ntb_queue_entry *entry); 232e47937d1SCarl Delsey static void ntb_tx_copy_task(struct ntb_transport_qp *qp, 233e47937d1SCarl Delsey struct ntb_queue_entry *entry, void *offset); 234e47937d1SCarl Delsey static void ntb_qp_full(void *arg); 235e47937d1SCarl Delsey static void ntb_transport_rxc_db(void *data, int db_num); 236e47937d1SCarl Delsey static void ntb_rx_pendq_full(void *arg); 237e47937d1SCarl Delsey static void ntb_transport_rx(struct ntb_transport_qp *qp); 238e47937d1SCarl Delsey static int ntb_process_rxc(struct ntb_transport_qp *qp); 239e47937d1SCarl Delsey static void ntb_rx_copy_task(struct ntb_transport_qp *qp, 240e47937d1SCarl Delsey struct ntb_queue_entry *entry, void *offset); 241e47937d1SCarl Delsey static void ntb_rx_completion_task(void *arg, int pending); 242e47937d1SCarl Delsey static void ntb_transport_event_callback(void *data, enum ntb_hw_event event); 243e47937d1SCarl Delsey static void ntb_transport_link_work(void *arg); 244e47937d1SCarl Delsey static int ntb_set_mw(struct ntb_netdev *nt, int num_mw, unsigned int size); 245e47937d1SCarl Delsey static void ntb_transport_setup_qp_mw(struct ntb_netdev *nt, 246e47937d1SCarl Delsey unsigned int qp_num); 247e47937d1SCarl Delsey static void ntb_qp_link_work(void *arg); 248e47937d1SCarl Delsey static void ntb_transport_link_cleanup(struct ntb_netdev *nt); 249e47937d1SCarl Delsey static void ntb_qp_link_down(struct ntb_transport_qp *qp); 250e47937d1SCarl Delsey static void ntb_qp_link_cleanup(struct ntb_transport_qp *qp); 251e47937d1SCarl Delsey static void ntb_transport_link_down(struct ntb_transport_qp *qp); 252e47937d1SCarl Delsey static void ntb_send_link_down(struct ntb_transport_qp *qp); 253e47937d1SCarl Delsey static void ntb_list_add(struct mtx *lock, struct ntb_queue_entry *entry, 254e47937d1SCarl Delsey struct ntb_queue_list *list); 255e47937d1SCarl Delsey static struct ntb_queue_entry *ntb_list_rm(struct mtx *lock, 256e47937d1SCarl Delsey struct ntb_queue_list *list); 257e47937d1SCarl Delsey static void create_random_local_eui48(u_char *eaddr); 258e47937d1SCarl Delsey static unsigned int ntb_transport_max_size(struct ntb_transport_qp *qp); 259e47937d1SCarl Delsey 260e47937d1SCarl Delsey MALLOC_DEFINE(M_NTB_IF, "if_ntb", "ntb network driver"); 261e47937d1SCarl Delsey 262e47937d1SCarl Delsey /* Module setup and teardown */ 263e47937d1SCarl Delsey static int 264e47937d1SCarl Delsey ntb_handle_module_events(struct module *m, int what, void *arg) 265e47937d1SCarl Delsey { 266e47937d1SCarl Delsey int err = 0; 267e47937d1SCarl Delsey 268e47937d1SCarl Delsey switch (what) { 269e47937d1SCarl Delsey case MOD_LOAD: 270e47937d1SCarl Delsey err = ntb_setup_interface(); 271e47937d1SCarl Delsey break; 272e47937d1SCarl Delsey case MOD_UNLOAD: 273e47937d1SCarl Delsey err = ntb_teardown_interface(); 274e47937d1SCarl Delsey break; 275e47937d1SCarl Delsey default: 276e47937d1SCarl Delsey err = EOPNOTSUPP; 277e47937d1SCarl Delsey break; 278e47937d1SCarl Delsey } 279e47937d1SCarl Delsey return (err); 280e47937d1SCarl Delsey } 281e47937d1SCarl Delsey 282e47937d1SCarl Delsey static moduledata_t ntb_transport_mod = { 283e47937d1SCarl Delsey "ntb_transport", 284e47937d1SCarl Delsey ntb_handle_module_events, 285e47937d1SCarl Delsey NULL 286e47937d1SCarl Delsey }; 287e47937d1SCarl Delsey 288e47937d1SCarl Delsey DECLARE_MODULE(ntb_transport, ntb_transport_mod, SI_SUB_KLD, SI_ORDER_ANY); 289e47937d1SCarl Delsey MODULE_DEPEND(ntb_transport, ntb_hw, 1, 1, 1); 290e47937d1SCarl Delsey 291e47937d1SCarl Delsey static int 292e47937d1SCarl Delsey ntb_setup_interface() 293e47937d1SCarl Delsey { 294e47937d1SCarl Delsey struct ifnet *ifp; 295e47937d1SCarl Delsey struct ntb_queue_handlers handlers = { ntb_net_rx_handler, 296e47937d1SCarl Delsey ntb_net_tx_handler, ntb_net_event_handler }; 297e47937d1SCarl Delsey 298e47937d1SCarl Delsey net_softc.ntb = devclass_get_softc(devclass_find("ntb_hw"), 0); 299e47937d1SCarl Delsey if (net_softc.ntb == NULL) { 300e47937d1SCarl Delsey printf("ntb: Can't find devclass\n"); 301e47937d1SCarl Delsey return (ENXIO); 302e47937d1SCarl Delsey } 303e47937d1SCarl Delsey 304e47937d1SCarl Delsey ntb_transport_init(net_softc.ntb); 305e47937d1SCarl Delsey 306e47937d1SCarl Delsey ifp = net_softc.ifp = if_alloc(IFT_ETHER); 307e47937d1SCarl Delsey if (ifp == NULL) { 308e47937d1SCarl Delsey printf("ntb: cannot allocate ifnet structure\n"); 309e47937d1SCarl Delsey return (ENOMEM); 310e47937d1SCarl Delsey } 311e47937d1SCarl Delsey 312e47937d1SCarl Delsey net_softc.qp = ntb_transport_create_queue(ifp, net_softc.ntb, 313e47937d1SCarl Delsey &handlers); 314e47937d1SCarl Delsey if_initname(ifp, "ntb", 0); 315e47937d1SCarl Delsey ifp->if_init = ntb_net_init; 316e47937d1SCarl Delsey ifp->if_softc = &net_softc; 317e47937d1SCarl Delsey ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX; 318e47937d1SCarl Delsey ifp->if_ioctl = ntb_ioctl; 319e47937d1SCarl Delsey ifp->if_start = ntb_start; 320e47937d1SCarl Delsey IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN); 321e47937d1SCarl Delsey ifp->if_snd.ifq_drv_maxlen = IFQ_MAXLEN; 322e47937d1SCarl Delsey IFQ_SET_READY(&ifp->if_snd); 323e47937d1SCarl Delsey create_random_local_eui48(net_softc.eaddr); 324e47937d1SCarl Delsey ether_ifattach(ifp, net_softc.eaddr); 325e47937d1SCarl Delsey ifp->if_capabilities = IFCAP_HWCSUM | IFCAP_JUMBO_MTU; 326e47937d1SCarl Delsey ifp->if_capenable = ifp->if_capabilities; 327e47937d1SCarl Delsey 328e47937d1SCarl Delsey ntb_transport_link_up(net_softc.qp); 329e47937d1SCarl Delsey net_softc.bufsize = ntb_transport_max_size(net_softc.qp) + 330e47937d1SCarl Delsey sizeof(struct ether_header); 331e47937d1SCarl Delsey return (0); 332e47937d1SCarl Delsey } 333e47937d1SCarl Delsey 334e47937d1SCarl Delsey static int 335e47937d1SCarl Delsey ntb_teardown_interface() 336e47937d1SCarl Delsey { 337e47937d1SCarl Delsey struct ifnet *ifp = net_softc.ifp; 338e47937d1SCarl Delsey 339e47937d1SCarl Delsey ntb_transport_link_down(net_softc.qp); 340e47937d1SCarl Delsey 341e47937d1SCarl Delsey ether_ifdetach(ifp); 342e47937d1SCarl Delsey if_free(ifp); 343e47937d1SCarl Delsey ntb_transport_free_queue(net_softc.qp); 344e47937d1SCarl Delsey ntb_transport_free(&net_softc); 345e47937d1SCarl Delsey 346e47937d1SCarl Delsey return (0); 347e47937d1SCarl Delsey } 348e47937d1SCarl Delsey 349e47937d1SCarl Delsey /* Network device interface */ 350e47937d1SCarl Delsey 351e47937d1SCarl Delsey static void 352e47937d1SCarl Delsey ntb_net_init(void *arg) 353e47937d1SCarl Delsey { 354e47937d1SCarl Delsey struct ntb_netdev *ntb_softc = arg; 355e47937d1SCarl Delsey struct ifnet *ifp = ntb_softc->ifp; 356e47937d1SCarl Delsey 357e47937d1SCarl Delsey ifp->if_drv_flags |= IFF_DRV_RUNNING; 358e47937d1SCarl Delsey ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 359e47937d1SCarl Delsey ifp->if_flags |= IFF_UP; 360e47937d1SCarl Delsey if_link_state_change(ifp, LINK_STATE_UP); 361e47937d1SCarl Delsey } 362e47937d1SCarl Delsey 363e47937d1SCarl Delsey static int 364e47937d1SCarl Delsey ntb_ioctl(struct ifnet *ifp, u_long command, caddr_t data) 365e47937d1SCarl Delsey { 366e47937d1SCarl Delsey struct ntb_netdev *nt = ifp->if_softc; 367e47937d1SCarl Delsey struct ifreq *ifr = (struct ifreq *)data; 368e47937d1SCarl Delsey int error = 0; 369e47937d1SCarl Delsey 370e47937d1SCarl Delsey switch (command) { 371e47937d1SCarl Delsey case SIOCSIFMTU: 372e47937d1SCarl Delsey { 373e47937d1SCarl Delsey if (ifr->ifr_mtu > ntb_transport_max_size(nt->qp) - 374e47937d1SCarl Delsey ETHER_HDR_LEN - ETHER_CRC_LEN) { 375e47937d1SCarl Delsey error = EINVAL; 376e47937d1SCarl Delsey break; 377e47937d1SCarl Delsey } 378e47937d1SCarl Delsey 379e47937d1SCarl Delsey ifp->if_mtu = ifr->ifr_mtu; 380e47937d1SCarl Delsey break; 381e47937d1SCarl Delsey } 382e47937d1SCarl Delsey default: 383e47937d1SCarl Delsey error = ether_ioctl(ifp, command, data); 384e47937d1SCarl Delsey break; 385e47937d1SCarl Delsey } 386e47937d1SCarl Delsey 387e47937d1SCarl Delsey return (error); 388e47937d1SCarl Delsey } 389e47937d1SCarl Delsey 390e47937d1SCarl Delsey 391e47937d1SCarl Delsey static void 392e47937d1SCarl Delsey ntb_start(struct ifnet *ifp) 393e47937d1SCarl Delsey { 394e47937d1SCarl Delsey struct mbuf *m_head; 395e47937d1SCarl Delsey struct ntb_netdev *nt = ifp->if_softc; 396e47937d1SCarl Delsey int rc; 397e47937d1SCarl Delsey 398e47937d1SCarl Delsey mtx_lock(&nt->tx_lock); 399e47937d1SCarl Delsey ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 400e47937d1SCarl Delsey CTR0(KTR_NTB, "TX: ntb_start"); 401e47937d1SCarl Delsey while (!IFQ_DRV_IS_EMPTY(&ifp->if_snd)) { 402e47937d1SCarl Delsey IFQ_DRV_DEQUEUE(&ifp->if_snd, m_head); 403e47937d1SCarl Delsey CTR1(KTR_NTB, "TX: start mbuf %p", m_head); 404e47937d1SCarl Delsey rc = ntb_transport_tx_enqueue(nt->qp, m_head, m_head, 405e47937d1SCarl Delsey m_length(m_head, NULL)); 406e47937d1SCarl Delsey if (rc != 0) { 407e47937d1SCarl Delsey CTR1(KTR_NTB, 408e47937d1SCarl Delsey "TX: couldn't tx mbuf %p. Returning to snd q", 409e47937d1SCarl Delsey m_head); 410e47937d1SCarl Delsey if (rc == EAGAIN) { 411e47937d1SCarl Delsey ifp->if_drv_flags |= IFF_DRV_OACTIVE; 412e47937d1SCarl Delsey IFQ_DRV_PREPEND(&ifp->if_snd, m_head); 413e47937d1SCarl Delsey callout_reset(&nt->qp->queue_full, hz / 1000, 414e47937d1SCarl Delsey ntb_qp_full, ifp); 415e47937d1SCarl Delsey } 416e47937d1SCarl Delsey break; 417e47937d1SCarl Delsey } 418e47937d1SCarl Delsey 419e47937d1SCarl Delsey } 420e47937d1SCarl Delsey mtx_unlock(&nt->tx_lock); 421e47937d1SCarl Delsey } 422e47937d1SCarl Delsey 423e47937d1SCarl Delsey /* Network Device Callbacks */ 424e47937d1SCarl Delsey static void 425e47937d1SCarl Delsey ntb_net_tx_handler(struct ntb_transport_qp *qp, void *qp_data, void *data, 426e47937d1SCarl Delsey int len) 427e47937d1SCarl Delsey { 428e47937d1SCarl Delsey 429e47937d1SCarl Delsey m_freem(data); 430e47937d1SCarl Delsey CTR1(KTR_NTB, "TX: tx_handler freeing mbuf %p", data); 431e47937d1SCarl Delsey } 432e47937d1SCarl Delsey 433e47937d1SCarl Delsey static void 434e47937d1SCarl Delsey ntb_net_rx_handler(struct ntb_transport_qp *qp, void *qp_data, void *data, 435e47937d1SCarl Delsey int len) 436e47937d1SCarl Delsey { 437e47937d1SCarl Delsey struct mbuf *m = data; 438e47937d1SCarl Delsey struct ifnet *ifp = qp_data; 439e47937d1SCarl Delsey 440e47937d1SCarl Delsey CTR0(KTR_NTB, "RX: rx handler"); 441e47937d1SCarl Delsey (*ifp->if_input)(ifp, m); 442e47937d1SCarl Delsey } 443e47937d1SCarl Delsey 444e47937d1SCarl Delsey static void 445e47937d1SCarl Delsey ntb_net_event_handler(void *data, int status) 446e47937d1SCarl Delsey { 447e47937d1SCarl Delsey 448e47937d1SCarl Delsey } 449e47937d1SCarl Delsey 450e47937d1SCarl Delsey /* Transport Init and teardown */ 451e47937d1SCarl Delsey 452e47937d1SCarl Delsey static int 453e47937d1SCarl Delsey ntb_transport_init(struct ntb_softc *ntb) 454e47937d1SCarl Delsey { 455e47937d1SCarl Delsey struct ntb_netdev *nt = &net_softc; 456e47937d1SCarl Delsey int rc, i; 457e47937d1SCarl Delsey 458e47937d1SCarl Delsey nt->max_qps = max_num_clients; 459e47937d1SCarl Delsey ntb_register_transport(ntb, nt); 460e47937d1SCarl Delsey mtx_init(&nt->tx_lock, "ntb transport tx", NULL, MTX_DEF); 461e47937d1SCarl Delsey mtx_init(&nt->rx_lock, "ntb transport rx", NULL, MTX_DEF); 462e47937d1SCarl Delsey 463e47937d1SCarl Delsey nt->qps = malloc(nt->max_qps * sizeof(struct ntb_transport_qp), 464e47937d1SCarl Delsey M_NTB_IF, M_WAITOK|M_ZERO); 465e47937d1SCarl Delsey 466e47937d1SCarl Delsey nt->qp_bitmap = ((uint64_t) 1 << nt->max_qps) - 1; 467e47937d1SCarl Delsey 468e47937d1SCarl Delsey for (i = 0; i < nt->max_qps; i++) 469e47937d1SCarl Delsey ntb_transport_init_queue(nt, i); 470e47937d1SCarl Delsey 471e47937d1SCarl Delsey callout_init(&nt->link_work, 0); 472e47937d1SCarl Delsey 473e47937d1SCarl Delsey rc = ntb_register_event_callback(ntb, 474e47937d1SCarl Delsey ntb_transport_event_callback); 475e47937d1SCarl Delsey if (rc != 0) 476e47937d1SCarl Delsey goto err; 477e47937d1SCarl Delsey 478e47937d1SCarl Delsey if (ntb_query_link_status(ntb)) 479e47937d1SCarl Delsey callout_reset(&nt->link_work, 0, ntb_transport_link_work, nt); 480e47937d1SCarl Delsey 481e47937d1SCarl Delsey return (0); 482e47937d1SCarl Delsey 483e47937d1SCarl Delsey err: 484e47937d1SCarl Delsey free(nt->qps, M_NTB_IF); 485e47937d1SCarl Delsey ntb_unregister_transport(ntb); 486e47937d1SCarl Delsey return (rc); 487e47937d1SCarl Delsey } 488e47937d1SCarl Delsey 489e47937d1SCarl Delsey static void 490e47937d1SCarl Delsey ntb_transport_free(void *transport) 491e47937d1SCarl Delsey { 492e47937d1SCarl Delsey struct ntb_netdev *nt = transport; 493e47937d1SCarl Delsey struct ntb_softc *ntb = nt->ntb; 494e47937d1SCarl Delsey int i; 495e47937d1SCarl Delsey 496e47937d1SCarl Delsey nt->transport_link = NTB_LINK_DOWN; 497e47937d1SCarl Delsey 498e47937d1SCarl Delsey callout_drain(&nt->link_work); 499e47937d1SCarl Delsey 500e47937d1SCarl Delsey /* verify that all the qp's are freed */ 501e47937d1SCarl Delsey for (i = 0; i < nt->max_qps; i++) 502e47937d1SCarl Delsey if (!test_bit(i, &nt->qp_bitmap)) 503e47937d1SCarl Delsey ntb_transport_free_queue(&nt->qps[i]); 504e47937d1SCarl Delsey 505e47937d1SCarl Delsey 506e47937d1SCarl Delsey ntb_unregister_event_callback(ntb); 507e47937d1SCarl Delsey 508e47937d1SCarl Delsey for (i = 0; i < NTB_NUM_MW; i++) 509e47937d1SCarl Delsey if (nt->mw[i].virt_addr != NULL) 510e47937d1SCarl Delsey contigfree(nt->mw[i].virt_addr, nt->mw[i].size, 511e47937d1SCarl Delsey M_NTB_IF); 512e47937d1SCarl Delsey 513e47937d1SCarl Delsey free(nt->qps, M_NTB_IF); 514e47937d1SCarl Delsey ntb_unregister_transport(ntb); 515e47937d1SCarl Delsey } 516e47937d1SCarl Delsey 517e47937d1SCarl Delsey static void 518e47937d1SCarl Delsey ntb_transport_init_queue(struct ntb_netdev *nt, unsigned int qp_num) 519e47937d1SCarl Delsey { 520e47937d1SCarl Delsey struct ntb_transport_qp *qp; 521e47937d1SCarl Delsey unsigned int num_qps_mw, tx_size; 522e47937d1SCarl Delsey uint8_t mw_num = QP_TO_MW(qp_num); 523e47937d1SCarl Delsey 524e47937d1SCarl Delsey qp = &nt->qps[qp_num]; 525e47937d1SCarl Delsey qp->qp_num = qp_num; 526e47937d1SCarl Delsey qp->transport = nt; 527e47937d1SCarl Delsey qp->ntb = nt->ntb; 528e47937d1SCarl Delsey qp->qp_link = NTB_LINK_DOWN; 529e47937d1SCarl Delsey qp->client_ready = NTB_LINK_DOWN; 530e47937d1SCarl Delsey qp->event_handler = NULL; 531e47937d1SCarl Delsey 532e47937d1SCarl Delsey if (nt->max_qps % NTB_NUM_MW && mw_num < nt->max_qps % NTB_NUM_MW) 533e47937d1SCarl Delsey num_qps_mw = nt->max_qps / NTB_NUM_MW + 1; 534e47937d1SCarl Delsey else 535e47937d1SCarl Delsey num_qps_mw = nt->max_qps / NTB_NUM_MW; 536e47937d1SCarl Delsey 537e47937d1SCarl Delsey tx_size = (unsigned int) ntb_get_mw_size(qp->ntb, mw_num) / num_qps_mw; 538e47937d1SCarl Delsey qp->rx_info = (struct ntb_rx_info *) 539e47937d1SCarl Delsey ((char *)ntb_get_mw_vbase(qp->ntb, mw_num) + 540e47937d1SCarl Delsey (qp_num / NTB_NUM_MW * tx_size)); 541e47937d1SCarl Delsey tx_size -= sizeof(struct ntb_rx_info); 542e47937d1SCarl Delsey 543e47937d1SCarl Delsey qp->tx_mw = qp->rx_info + sizeof(struct ntb_rx_info); 544e47937d1SCarl Delsey qp->tx_max_frame = min(transport_mtu + sizeof(struct ntb_payload_header), 545e47937d1SCarl Delsey tx_size); 546e47937d1SCarl Delsey qp->tx_max_entry = tx_size / qp->tx_max_frame; 547e47937d1SCarl Delsey qp->tx_index = 0; 548e47937d1SCarl Delsey 549e47937d1SCarl Delsey callout_init(&qp->link_work, 0); 550e47937d1SCarl Delsey callout_init(&qp->queue_full, CALLOUT_MPSAFE); 551e47937d1SCarl Delsey callout_init(&qp->rx_full, CALLOUT_MPSAFE); 552e47937d1SCarl Delsey 553e47937d1SCarl Delsey mtx_init(&qp->ntb_rx_pend_q_lock, "ntb rx pend q", NULL, MTX_SPIN); 554e47937d1SCarl Delsey mtx_init(&qp->ntb_rx_free_q_lock, "ntb rx free q", NULL, MTX_SPIN); 555e47937d1SCarl Delsey mtx_init(&qp->ntb_tx_free_q_lock, "ntb tx free q", NULL, MTX_SPIN); 556e47937d1SCarl Delsey TASK_INIT(&qp->rx_completion_task, 0, ntb_rx_completion_task, qp); 557e47937d1SCarl Delsey 558e47937d1SCarl Delsey STAILQ_INIT(&qp->rx_pend_q); 559e47937d1SCarl Delsey STAILQ_INIT(&qp->rx_free_q); 560e47937d1SCarl Delsey STAILQ_INIT(&qp->tx_free_q); 561e47937d1SCarl Delsey } 562e47937d1SCarl Delsey 563e47937d1SCarl Delsey static void 564e47937d1SCarl Delsey ntb_transport_free_queue(struct ntb_transport_qp *qp) 565e47937d1SCarl Delsey { 566e47937d1SCarl Delsey struct ntb_queue_entry *entry; 567e47937d1SCarl Delsey 568e47937d1SCarl Delsey if (qp == NULL) 569e47937d1SCarl Delsey return; 570e47937d1SCarl Delsey 571e47937d1SCarl Delsey callout_drain(&qp->link_work); 572e47937d1SCarl Delsey 573e47937d1SCarl Delsey ntb_unregister_db_callback(qp->ntb, qp->qp_num); 574e47937d1SCarl Delsey 575e47937d1SCarl Delsey while ((entry = ntb_list_rm(&qp->ntb_rx_free_q_lock, &qp->rx_free_q))) 576e47937d1SCarl Delsey free(entry, M_NTB_IF); 577e47937d1SCarl Delsey 578e47937d1SCarl Delsey while ((entry = ntb_list_rm(&qp->ntb_rx_pend_q_lock, &qp->rx_pend_q))) 579e47937d1SCarl Delsey free(entry, M_NTB_IF); 580e47937d1SCarl Delsey 581e47937d1SCarl Delsey while ((entry = ntb_list_rm(&qp->ntb_tx_free_q_lock, &qp->tx_free_q))) 582e47937d1SCarl Delsey free(entry, M_NTB_IF); 583e47937d1SCarl Delsey 584e47937d1SCarl Delsey set_bit(qp->qp_num, &qp->transport->qp_bitmap); 585e47937d1SCarl Delsey } 586e47937d1SCarl Delsey 587e47937d1SCarl Delsey /** 588e47937d1SCarl Delsey * ntb_transport_create_queue - Create a new NTB transport layer queue 589e47937d1SCarl Delsey * @rx_handler: receive callback function 590e47937d1SCarl Delsey * @tx_handler: transmit callback function 591e47937d1SCarl Delsey * @event_handler: event callback function 592e47937d1SCarl Delsey * 593e47937d1SCarl Delsey * Create a new NTB transport layer queue and provide the queue with a callback 594e47937d1SCarl Delsey * routine for both transmit and receive. The receive callback routine will be 595e47937d1SCarl Delsey * used to pass up data when the transport has received it on the queue. The 596e47937d1SCarl Delsey * transmit callback routine will be called when the transport has completed the 597e47937d1SCarl Delsey * transmission of the data on the queue and the data is ready to be freed. 598e47937d1SCarl Delsey * 599e47937d1SCarl Delsey * RETURNS: pointer to newly created ntb_queue, NULL on error. 600e47937d1SCarl Delsey */ 601e47937d1SCarl Delsey static struct ntb_transport_qp * 602e47937d1SCarl Delsey ntb_transport_create_queue(void *data, struct ntb_softc *pdev, 603e47937d1SCarl Delsey const struct ntb_queue_handlers *handlers) 604e47937d1SCarl Delsey { 605e47937d1SCarl Delsey struct ntb_queue_entry *entry; 606e47937d1SCarl Delsey struct ntb_transport_qp *qp; 607e47937d1SCarl Delsey struct ntb_netdev *nt; 608e47937d1SCarl Delsey unsigned int free_queue; 609e47937d1SCarl Delsey int rc, i; 610e47937d1SCarl Delsey 611e47937d1SCarl Delsey nt = ntb_find_transport(pdev); 612e47937d1SCarl Delsey if (nt == NULL) 613e47937d1SCarl Delsey goto err; 614e47937d1SCarl Delsey 615e47937d1SCarl Delsey free_queue = ffs(nt->qp_bitmap); 616e47937d1SCarl Delsey if (free_queue == 0) 617e47937d1SCarl Delsey goto err; 618e47937d1SCarl Delsey 619e47937d1SCarl Delsey /* decrement free_queue to make it zero based */ 620e47937d1SCarl Delsey free_queue--; 621e47937d1SCarl Delsey 622e47937d1SCarl Delsey clear_bit(free_queue, &nt->qp_bitmap); 623e47937d1SCarl Delsey 624e47937d1SCarl Delsey qp = &nt->qps[free_queue]; 625e47937d1SCarl Delsey qp->cb_data = data; 626e47937d1SCarl Delsey qp->rx_handler = handlers->rx_handler; 627e47937d1SCarl Delsey qp->tx_handler = handlers->tx_handler; 628e47937d1SCarl Delsey qp->event_handler = handlers->event_handler; 629e47937d1SCarl Delsey 630e47937d1SCarl Delsey for (i = 0; i < NTB_QP_DEF_NUM_ENTRIES; i++) { 631e47937d1SCarl Delsey entry = malloc(sizeof(struct ntb_queue_entry), M_NTB_IF, 632e47937d1SCarl Delsey M_WAITOK|M_ZERO); 633e47937d1SCarl Delsey entry->cb_data = nt->ifp; 634e47937d1SCarl Delsey entry->buf = NULL; 635e47937d1SCarl Delsey entry->len = transport_mtu; 636e47937d1SCarl Delsey ntb_list_add(&qp->ntb_rx_pend_q_lock, entry, &qp->rx_pend_q); 637e47937d1SCarl Delsey } 638e47937d1SCarl Delsey 639e47937d1SCarl Delsey for (i = 0; i < NTB_QP_DEF_NUM_ENTRIES; i++) { 640e47937d1SCarl Delsey entry = malloc(sizeof(struct ntb_queue_entry), M_NTB_IF, 641e47937d1SCarl Delsey M_WAITOK|M_ZERO); 642e47937d1SCarl Delsey ntb_list_add(&qp->ntb_tx_free_q_lock, entry, &qp->tx_free_q); 643e47937d1SCarl Delsey } 644e47937d1SCarl Delsey 645e47937d1SCarl Delsey rc = ntb_register_db_callback(qp->ntb, free_queue, qp, 646e47937d1SCarl Delsey ntb_transport_rxc_db); 647e47937d1SCarl Delsey if (rc != 0) 648e47937d1SCarl Delsey goto err1; 649e47937d1SCarl Delsey 650e47937d1SCarl Delsey return (qp); 651e47937d1SCarl Delsey 652e47937d1SCarl Delsey err1: 653e47937d1SCarl Delsey while ((entry = ntb_list_rm(&qp->ntb_tx_free_q_lock, &qp->tx_free_q))) 654e47937d1SCarl Delsey free(entry, M_NTB_IF); 655e47937d1SCarl Delsey while ((entry = ntb_list_rm(&qp->ntb_rx_free_q_lock, &qp->rx_free_q))) 656e47937d1SCarl Delsey free(entry, M_NTB_IF); 657e47937d1SCarl Delsey set_bit(free_queue, &nt->qp_bitmap); 658e47937d1SCarl Delsey err: 659e47937d1SCarl Delsey return (NULL); 660e47937d1SCarl Delsey } 661e47937d1SCarl Delsey 662e47937d1SCarl Delsey /** 663e47937d1SCarl Delsey * ntb_transport_link_up - Notify NTB transport of client readiness to use queue 664e47937d1SCarl Delsey * @qp: NTB transport layer queue to be enabled 665e47937d1SCarl Delsey * 666e47937d1SCarl Delsey * Notify NTB transport layer of client readiness to use queue 667e47937d1SCarl Delsey */ 668e47937d1SCarl Delsey static void 669e47937d1SCarl Delsey ntb_transport_link_up(struct ntb_transport_qp *qp) 670e47937d1SCarl Delsey { 671e47937d1SCarl Delsey 672e47937d1SCarl Delsey if (qp == NULL) 673e47937d1SCarl Delsey return; 674e47937d1SCarl Delsey 675e47937d1SCarl Delsey qp->client_ready = NTB_LINK_UP; 676e47937d1SCarl Delsey 677e47937d1SCarl Delsey if (qp->transport->transport_link == NTB_LINK_UP) 678e47937d1SCarl Delsey callout_reset(&qp->link_work, 0, ntb_qp_link_work, qp); 679e47937d1SCarl Delsey } 680e47937d1SCarl Delsey 681e47937d1SCarl Delsey 682e47937d1SCarl Delsey 683e47937d1SCarl Delsey /* Transport Tx */ 684e47937d1SCarl Delsey 685e47937d1SCarl Delsey /** 686e47937d1SCarl Delsey * ntb_transport_tx_enqueue - Enqueue a new NTB queue entry 687e47937d1SCarl Delsey * @qp: NTB transport layer queue the entry is to be enqueued on 688e47937d1SCarl Delsey * @cb: per buffer pointer for callback function to use 689e47937d1SCarl Delsey * @data: pointer to data buffer that will be sent 690e47937d1SCarl Delsey * @len: length of the data buffer 691e47937d1SCarl Delsey * 692e47937d1SCarl Delsey * Enqueue a new transmit buffer onto the transport queue from which a NTB 693e47937d1SCarl Delsey * payload will be transmitted. This assumes that a lock is behing held to 694e47937d1SCarl Delsey * serialize access to the qp. 695e47937d1SCarl Delsey * 696e47937d1SCarl Delsey * RETURNS: An appropriate ERRNO error value on error, or zero for success. 697e47937d1SCarl Delsey */ 698e47937d1SCarl Delsey static int 699e47937d1SCarl Delsey ntb_transport_tx_enqueue(struct ntb_transport_qp *qp, void *cb, void *data, 700e47937d1SCarl Delsey unsigned int len) 701e47937d1SCarl Delsey { 702e47937d1SCarl Delsey struct ntb_queue_entry *entry; 703e47937d1SCarl Delsey int rc; 704e47937d1SCarl Delsey 705e47937d1SCarl Delsey if (qp == NULL || qp->qp_link != NTB_LINK_UP || len == 0) { 706e47937d1SCarl Delsey CTR0(KTR_NTB, "TX: link not up"); 707e47937d1SCarl Delsey return (EINVAL); 708e47937d1SCarl Delsey } 709e47937d1SCarl Delsey 710e47937d1SCarl Delsey entry = ntb_list_rm(&qp->ntb_tx_free_q_lock, &qp->tx_free_q); 711e47937d1SCarl Delsey if (entry == NULL) { 712e47937d1SCarl Delsey CTR0(KTR_NTB, "TX: couldn't get entry from tx_free_q"); 713e47937d1SCarl Delsey return (ENOMEM); 714e47937d1SCarl Delsey } 715e47937d1SCarl Delsey CTR1(KTR_NTB, "TX: got entry %p from tx_free_q", entry); 716e47937d1SCarl Delsey 717e47937d1SCarl Delsey entry->cb_data = cb; 718e47937d1SCarl Delsey entry->buf = data; 719e47937d1SCarl Delsey entry->len = len; 720e47937d1SCarl Delsey entry->flags = 0; 721e47937d1SCarl Delsey 722e47937d1SCarl Delsey rc = ntb_process_tx(qp, entry); 723e47937d1SCarl Delsey if (rc != 0) { 724e47937d1SCarl Delsey ntb_list_add(&qp->ntb_tx_free_q_lock, entry, &qp->tx_free_q); 725e47937d1SCarl Delsey CTR1(KTR_NTB, 726e47937d1SCarl Delsey "TX: process_tx failed. Returning entry %p to tx_free_q", 727e47937d1SCarl Delsey entry); 728e47937d1SCarl Delsey } 729e47937d1SCarl Delsey return (rc); 730e47937d1SCarl Delsey } 731e47937d1SCarl Delsey 732e47937d1SCarl Delsey static int 733e47937d1SCarl Delsey ntb_process_tx(struct ntb_transport_qp *qp, struct ntb_queue_entry *entry) 734e47937d1SCarl Delsey { 735e47937d1SCarl Delsey void *offset; 736e47937d1SCarl Delsey 737e47937d1SCarl Delsey offset = (char *)qp->tx_mw + qp->tx_max_frame * qp->tx_index; 738e47937d1SCarl Delsey CTR3(KTR_NTB, 739e47937d1SCarl Delsey "TX: process_tx: tx_pkts=%u, tx_index=%u, remote entry=%u", 740e47937d1SCarl Delsey qp->tx_pkts, qp->tx_index, qp->remote_rx_info->entry); 741e47937d1SCarl Delsey if (qp->tx_index == qp->remote_rx_info->entry) { 742e47937d1SCarl Delsey CTR0(KTR_NTB, "TX: ring full"); 743e47937d1SCarl Delsey qp->tx_ring_full++; 744e47937d1SCarl Delsey return (EAGAIN); 745e47937d1SCarl Delsey } 746e47937d1SCarl Delsey 747e47937d1SCarl Delsey if (entry->len > qp->tx_max_frame - sizeof(struct ntb_payload_header)) { 748e47937d1SCarl Delsey if (qp->tx_handler != NULL) 749e47937d1SCarl Delsey qp->tx_handler(qp, qp->cb_data, entry->buf, 750e47937d1SCarl Delsey EIO); 751e47937d1SCarl Delsey 752e47937d1SCarl Delsey ntb_list_add(&qp->ntb_tx_free_q_lock, entry, &qp->tx_free_q); 753e47937d1SCarl Delsey CTR1(KTR_NTB, 754e47937d1SCarl Delsey "TX: frame too big. returning entry %p to tx_free_q", 755e47937d1SCarl Delsey entry); 756e47937d1SCarl Delsey return (0); 757e47937d1SCarl Delsey } 758e47937d1SCarl Delsey CTR2(KTR_NTB, "TX: copying entry %p to offset %p", entry, offset); 759e47937d1SCarl Delsey ntb_tx_copy_task(qp, entry, offset); 760e47937d1SCarl Delsey 761e47937d1SCarl Delsey qp->tx_index++; 762e47937d1SCarl Delsey qp->tx_index %= qp->tx_max_entry; 763e47937d1SCarl Delsey 764e47937d1SCarl Delsey qp->tx_pkts++; 765e47937d1SCarl Delsey 766e47937d1SCarl Delsey return (0); 767e47937d1SCarl Delsey } 768e47937d1SCarl Delsey 769e47937d1SCarl Delsey static void 770e47937d1SCarl Delsey ntb_tx_copy_task(struct ntb_transport_qp *qp, struct ntb_queue_entry *entry, 771e47937d1SCarl Delsey void *offset) 772e47937d1SCarl Delsey { 773e47937d1SCarl Delsey struct ntb_payload_header *hdr; 774e47937d1SCarl Delsey 775e47937d1SCarl Delsey CTR2(KTR_NTB, "TX: copying %d bytes to offset %p", entry->len, offset); 776e47937d1SCarl Delsey if (entry->buf != NULL) 777e47937d1SCarl Delsey m_copydata((struct mbuf *)entry->buf, 0, entry->len, offset); 778e47937d1SCarl Delsey 779e47937d1SCarl Delsey hdr = (struct ntb_payload_header *)((char *)offset + qp->tx_max_frame - 780e47937d1SCarl Delsey sizeof(struct ntb_payload_header)); 781e47937d1SCarl Delsey hdr->len = entry->len; /* TODO: replace with bus_space_write */ 782e47937d1SCarl Delsey hdr->ver = qp->tx_pkts; /* TODO: replace with bus_space_write */ 783e47937d1SCarl Delsey wmb(); 784e47937d1SCarl Delsey /* TODO: replace with bus_space_write */ 785e47937d1SCarl Delsey hdr->flags = entry->flags | IF_NTB_DESC_DONE_FLAG; 786e47937d1SCarl Delsey 787e47937d1SCarl Delsey ntb_ring_sdb(qp->ntb, qp->qp_num); 788e47937d1SCarl Delsey 789e47937d1SCarl Delsey /* 790e47937d1SCarl Delsey * The entry length can only be zero if the packet is intended to be a 791e47937d1SCarl Delsey * "link down" or similar. Since no payload is being sent in these 792e47937d1SCarl Delsey * cases, there is nothing to add to the completion queue. 793e47937d1SCarl Delsey */ 794e47937d1SCarl Delsey if (entry->len > 0) { 795e47937d1SCarl Delsey qp->tx_bytes += entry->len; 796e47937d1SCarl Delsey 797e47937d1SCarl Delsey if (qp->tx_handler) 798e47937d1SCarl Delsey qp->tx_handler(qp, qp->cb_data, entry->cb_data, 799e47937d1SCarl Delsey entry->len); 800e47937d1SCarl Delsey } 801e47937d1SCarl Delsey 802e47937d1SCarl Delsey CTR2(KTR_NTB, 803e47937d1SCarl Delsey "TX: entry %p sent. hdr->ver = %d, Returning to tx_free_q", entry, 804e47937d1SCarl Delsey hdr->ver); 805e47937d1SCarl Delsey ntb_list_add(&qp->ntb_tx_free_q_lock, entry, &qp->tx_free_q); 806e47937d1SCarl Delsey } 807e47937d1SCarl Delsey 808e47937d1SCarl Delsey static void 809e47937d1SCarl Delsey ntb_qp_full(void *arg) 810e47937d1SCarl Delsey { 811e47937d1SCarl Delsey 812e47937d1SCarl Delsey CTR0(KTR_NTB, "TX: qp_full callout"); 813e47937d1SCarl Delsey ntb_start(arg); 814e47937d1SCarl Delsey } 815e47937d1SCarl Delsey 816e47937d1SCarl Delsey /* Transport Rx */ 817e47937d1SCarl Delsey static void 818e47937d1SCarl Delsey ntb_transport_rxc_db(void *data, int db_num) 819e47937d1SCarl Delsey { 820e47937d1SCarl Delsey struct ntb_transport_qp *qp = data; 821e47937d1SCarl Delsey 822e47937d1SCarl Delsey ntb_transport_rx(qp); 823e47937d1SCarl Delsey } 824e47937d1SCarl Delsey 825e47937d1SCarl Delsey static void 826e47937d1SCarl Delsey ntb_rx_pendq_full(void *arg) 827e47937d1SCarl Delsey { 828e47937d1SCarl Delsey 829e47937d1SCarl Delsey CTR0(KTR_NTB, "RX: ntb_rx_pendq_full callout"); 830e47937d1SCarl Delsey ntb_transport_rx(arg); 831e47937d1SCarl Delsey } 832e47937d1SCarl Delsey 833e47937d1SCarl Delsey static void 834e47937d1SCarl Delsey ntb_transport_rx(struct ntb_transport_qp *qp) 835e47937d1SCarl Delsey { 836e47937d1SCarl Delsey int rc, i; 837e47937d1SCarl Delsey 838e47937d1SCarl Delsey /* 839e47937d1SCarl Delsey * Limit the number of packets processed in a single interrupt to 840e47937d1SCarl Delsey * provide fairness to others 841e47937d1SCarl Delsey */ 842e47937d1SCarl Delsey mtx_lock(&qp->transport->rx_lock); 843e47937d1SCarl Delsey CTR0(KTR_NTB, "RX: transport_rx"); 844e47937d1SCarl Delsey for (i = 0; i < NTB_RX_MAX_PKTS; i++) { 845e47937d1SCarl Delsey rc = ntb_process_rxc(qp); 846e47937d1SCarl Delsey if (rc != 0) { 847e47937d1SCarl Delsey CTR0(KTR_NTB, "RX: process_rxc failed"); 848e47937d1SCarl Delsey break; 849e47937d1SCarl Delsey } 850e47937d1SCarl Delsey } 851e47937d1SCarl Delsey mtx_unlock(&qp->transport->rx_lock); 852e47937d1SCarl Delsey } 853e47937d1SCarl Delsey 854e47937d1SCarl Delsey static int 855e47937d1SCarl Delsey ntb_process_rxc(struct ntb_transport_qp *qp) 856e47937d1SCarl Delsey { 857e47937d1SCarl Delsey struct ntb_payload_header *hdr; 858e47937d1SCarl Delsey struct ntb_queue_entry *entry; 859e47937d1SCarl Delsey void *offset; 860e47937d1SCarl Delsey 861e47937d1SCarl Delsey offset = (void *) 862e47937d1SCarl Delsey ((char *)qp->rx_buff + qp->rx_max_frame * qp->rx_index); 863e47937d1SCarl Delsey hdr = (void *) 864e47937d1SCarl Delsey ((char *)offset + qp->rx_max_frame - 865e47937d1SCarl Delsey sizeof(struct ntb_payload_header)); 866e47937d1SCarl Delsey 867e47937d1SCarl Delsey CTR1(KTR_NTB, "RX: process_rxc rx_index = %u", qp->rx_index); 868e47937d1SCarl Delsey entry = ntb_list_rm(&qp->ntb_rx_pend_q_lock, &qp->rx_pend_q); 869e47937d1SCarl Delsey if (entry == NULL) { 870e47937d1SCarl Delsey qp->rx_err_no_buf++; 871e47937d1SCarl Delsey CTR0(KTR_NTB, "RX: No entries in rx_pend_q"); 872e47937d1SCarl Delsey return (ENOMEM); 873e47937d1SCarl Delsey } 874e47937d1SCarl Delsey callout_stop(&qp->rx_full); 875e47937d1SCarl Delsey CTR1(KTR_NTB, "RX: rx entry %p from rx_pend_q", entry); 876e47937d1SCarl Delsey 877e47937d1SCarl Delsey if ((hdr->flags & IF_NTB_DESC_DONE_FLAG) == 0) { 878e47937d1SCarl Delsey CTR1(KTR_NTB, 879e47937d1SCarl Delsey "RX: hdr not done. Returning entry %p to rx_pend_q", entry); 880e47937d1SCarl Delsey ntb_list_add(&qp->ntb_rx_pend_q_lock, entry, &qp->rx_pend_q); 881e47937d1SCarl Delsey qp->rx_ring_empty++; 882e47937d1SCarl Delsey return (EAGAIN); 883e47937d1SCarl Delsey } 884e47937d1SCarl Delsey 885e47937d1SCarl Delsey if (hdr->ver != (uint32_t) qp->rx_pkts) { 886e47937d1SCarl Delsey CTR3(KTR_NTB,"RX: ver != rx_pkts (%x != %lx). " 887e47937d1SCarl Delsey "Returning entry %p to rx_pend_q", hdr->ver, qp->rx_pkts, 888e47937d1SCarl Delsey entry); 889e47937d1SCarl Delsey ntb_list_add(&qp->ntb_rx_pend_q_lock, entry, &qp->rx_pend_q); 890e47937d1SCarl Delsey qp->rx_err_ver++; 891e47937d1SCarl Delsey return (EIO); 892e47937d1SCarl Delsey } 893e47937d1SCarl Delsey 894e47937d1SCarl Delsey if ((hdr->flags & IF_NTB_LINK_DOWN_FLAG) != 0) { 895e47937d1SCarl Delsey ntb_qp_link_down(qp); 896e47937d1SCarl Delsey CTR1(KTR_NTB, 897e47937d1SCarl Delsey "RX: link down. adding entry %p back to rx_pend_q", entry); 898e47937d1SCarl Delsey ntb_list_add(&qp->ntb_rx_pend_q_lock, entry, &qp->rx_pend_q); 899e47937d1SCarl Delsey goto out; 900e47937d1SCarl Delsey } 901e47937d1SCarl Delsey 902e47937d1SCarl Delsey if (hdr->len <= entry->len) { 903e47937d1SCarl Delsey entry->len = hdr->len; 904e47937d1SCarl Delsey ntb_rx_copy_task(qp, entry, offset); 905e47937d1SCarl Delsey } else { 906e47937d1SCarl Delsey CTR1(KTR_NTB, 907e47937d1SCarl Delsey "RX: len too long. Returning entry %p to rx_pend_q", entry); 908e47937d1SCarl Delsey ntb_list_add(&qp->ntb_rx_pend_q_lock, entry, &qp->rx_pend_q); 909e47937d1SCarl Delsey 910e47937d1SCarl Delsey qp->rx_err_oflow++; 911e47937d1SCarl Delsey } 912e47937d1SCarl Delsey 913e47937d1SCarl Delsey qp->rx_bytes += hdr->len; 914e47937d1SCarl Delsey qp->rx_pkts++; 915e47937d1SCarl Delsey CTR1(KTR_NTB, "RX: received %ld rx_pkts", qp->rx_pkts); 916e47937d1SCarl Delsey 917e47937d1SCarl Delsey 918e47937d1SCarl Delsey out: 919e47937d1SCarl Delsey /* Ensure that the data is globally visible before clearing the flag */ 920e47937d1SCarl Delsey wmb(); 921e47937d1SCarl Delsey hdr->flags = 0; 922e47937d1SCarl Delsey /* TODO: replace with bus_space_write */ 923e47937d1SCarl Delsey qp->rx_info->entry = qp->rx_index; 924e47937d1SCarl Delsey 925e47937d1SCarl Delsey qp->rx_index++; 926e47937d1SCarl Delsey qp->rx_index %= qp->rx_max_entry; 927e47937d1SCarl Delsey 928e47937d1SCarl Delsey return (0); 929e47937d1SCarl Delsey } 930e47937d1SCarl Delsey 931e47937d1SCarl Delsey static void 932e47937d1SCarl Delsey ntb_rx_copy_task(struct ntb_transport_qp *qp, struct ntb_queue_entry *entry, 933e47937d1SCarl Delsey void *offset) 934e47937d1SCarl Delsey { 935e47937d1SCarl Delsey struct ifnet *ifp = entry->cb_data; 936e47937d1SCarl Delsey unsigned int len = entry->len; 937e47937d1SCarl Delsey struct mbuf *m; 938e47937d1SCarl Delsey 939e47937d1SCarl Delsey CTR2(KTR_NTB, "RX: copying %d bytes from offset %p", len, offset); 940e47937d1SCarl Delsey m = m_devget(offset, len, 0, ifp, NULL); 941e47937d1SCarl Delsey m->m_pkthdr.csum_flags = CSUM_IP_CHECKED | CSUM_IP_VALID; 942e47937d1SCarl Delsey 943e47937d1SCarl Delsey entry->buf = (void *)m; 944e47937d1SCarl Delsey 945e47937d1SCarl Delsey CTR2(KTR_NTB, 946e47937d1SCarl Delsey "RX: copied entry %p to mbuf %p. Adding entry to rx_free_q", entry, 947e47937d1SCarl Delsey m); 948e47937d1SCarl Delsey ntb_list_add(&qp->ntb_rx_free_q_lock, entry, &qp->rx_free_q); 949e47937d1SCarl Delsey 950e47937d1SCarl Delsey taskqueue_enqueue(taskqueue_swi, &qp->rx_completion_task); 951e47937d1SCarl Delsey } 952e47937d1SCarl Delsey 953e47937d1SCarl Delsey static void 954e47937d1SCarl Delsey ntb_rx_completion_task(void *arg, int pending) 955e47937d1SCarl Delsey { 956e47937d1SCarl Delsey struct ntb_transport_qp *qp = arg; 957e47937d1SCarl Delsey struct mbuf *m; 958e47937d1SCarl Delsey struct ntb_queue_entry *entry; 959e47937d1SCarl Delsey 960e47937d1SCarl Delsey CTR0(KTR_NTB, "RX: rx_completion_task"); 961e47937d1SCarl Delsey 962e47937d1SCarl Delsey while ((entry = ntb_list_rm(&qp->ntb_rx_free_q_lock, &qp->rx_free_q))) { 963e47937d1SCarl Delsey m = entry->buf; 964e47937d1SCarl Delsey CTR2(KTR_NTB, "RX: completing entry %p, mbuf %p", entry, m); 965e47937d1SCarl Delsey if (qp->rx_handler && qp->client_ready == NTB_LINK_UP) 966e47937d1SCarl Delsey qp->rx_handler(qp, qp->cb_data, m, entry->len); 967e47937d1SCarl Delsey 968e47937d1SCarl Delsey entry->buf = NULL; 969e47937d1SCarl Delsey entry->len = qp->transport->bufsize; 970e47937d1SCarl Delsey 971e47937d1SCarl Delsey CTR1(KTR_NTB,"RX: entry %p removed from rx_free_q " 972e47937d1SCarl Delsey "and added to rx_pend_q", entry); 973e47937d1SCarl Delsey ntb_list_add(&qp->ntb_rx_pend_q_lock, entry, &qp->rx_pend_q); 974e47937d1SCarl Delsey if (qp->rx_err_no_buf > qp->last_rx_no_buf) { 975e47937d1SCarl Delsey qp->last_rx_no_buf = qp->rx_err_no_buf; 976e47937d1SCarl Delsey CTR0(KTR_NTB, "RX: could spawn rx task"); 977e47937d1SCarl Delsey callout_reset(&qp->rx_full, hz / 1000, ntb_rx_pendq_full, 978e47937d1SCarl Delsey qp); 979e47937d1SCarl Delsey } 980e47937d1SCarl Delsey } 981e47937d1SCarl Delsey } 982e47937d1SCarl Delsey 983e47937d1SCarl Delsey /* Link Event handler */ 984e47937d1SCarl Delsey static void 985e47937d1SCarl Delsey ntb_transport_event_callback(void *data, enum ntb_hw_event event) 986e47937d1SCarl Delsey { 987e47937d1SCarl Delsey struct ntb_netdev *nt = data; 988e47937d1SCarl Delsey 989e47937d1SCarl Delsey switch (event) { 990e47937d1SCarl Delsey case NTB_EVENT_HW_LINK_UP: 991e47937d1SCarl Delsey callout_reset(&nt->link_work, 0, ntb_transport_link_work, nt); 992e47937d1SCarl Delsey break; 993e47937d1SCarl Delsey case NTB_EVENT_HW_LINK_DOWN: 994e47937d1SCarl Delsey ntb_transport_link_cleanup(nt); 995e47937d1SCarl Delsey break; 996e47937d1SCarl Delsey default: 997e47937d1SCarl Delsey panic("ntb: Unknown NTB event"); 998e47937d1SCarl Delsey } 999e47937d1SCarl Delsey } 1000e47937d1SCarl Delsey 1001e47937d1SCarl Delsey /* Link bring up */ 1002e47937d1SCarl Delsey static void 1003e47937d1SCarl Delsey ntb_transport_link_work(void *arg) 1004e47937d1SCarl Delsey { 1005e47937d1SCarl Delsey struct ntb_netdev *nt = arg; 1006e47937d1SCarl Delsey struct ntb_softc *ntb = nt->ntb; 1007e47937d1SCarl Delsey struct ntb_transport_qp *qp; 1008e47937d1SCarl Delsey uint32_t val; 1009e47937d1SCarl Delsey int rc, i; 1010e47937d1SCarl Delsey 1011e47937d1SCarl Delsey /* send the local info */ 1012e47937d1SCarl Delsey rc = ntb_write_remote_spad(ntb, IF_NTB_VERSION, NTB_TRANSPORT_VERSION); 1013e47937d1SCarl Delsey if (rc != 0) 1014e47937d1SCarl Delsey goto out; 1015e47937d1SCarl Delsey 1016e47937d1SCarl Delsey rc = ntb_write_remote_spad(ntb, IF_NTB_MW0_SZ, ntb_get_mw_size(ntb, 0)); 1017e47937d1SCarl Delsey if (rc != 0) 1018e47937d1SCarl Delsey goto out; 1019e47937d1SCarl Delsey 1020e47937d1SCarl Delsey rc = ntb_write_remote_spad(ntb, IF_NTB_MW1_SZ, ntb_get_mw_size(ntb, 1)); 1021e47937d1SCarl Delsey if (rc != 0) 1022e47937d1SCarl Delsey goto out; 1023e47937d1SCarl Delsey 1024e47937d1SCarl Delsey rc = ntb_write_remote_spad(ntb, IF_NTB_NUM_QPS, nt->max_qps); 1025e47937d1SCarl Delsey if (rc != 0) 1026e47937d1SCarl Delsey goto out; 1027e47937d1SCarl Delsey 1028e47937d1SCarl Delsey rc = ntb_read_remote_spad(ntb, IF_NTB_QP_LINKS, &val); 1029e47937d1SCarl Delsey if (rc != 0) 1030e47937d1SCarl Delsey goto out; 1031e47937d1SCarl Delsey 1032e47937d1SCarl Delsey rc = ntb_write_remote_spad(ntb, IF_NTB_QP_LINKS, val); 1033e47937d1SCarl Delsey if (rc != 0) 1034e47937d1SCarl Delsey goto out; 1035e47937d1SCarl Delsey 1036e47937d1SCarl Delsey /* Query the remote side for its info */ 1037e47937d1SCarl Delsey rc = ntb_read_local_spad(ntb, IF_NTB_VERSION, &val); 1038e47937d1SCarl Delsey if (rc != 0) 1039e47937d1SCarl Delsey goto out; 1040e47937d1SCarl Delsey 1041e47937d1SCarl Delsey if (val != NTB_TRANSPORT_VERSION) 1042e47937d1SCarl Delsey goto out; 1043e47937d1SCarl Delsey 1044e47937d1SCarl Delsey rc = ntb_read_local_spad(ntb, IF_NTB_NUM_QPS, &val); 1045e47937d1SCarl Delsey if (rc != 0) 1046e47937d1SCarl Delsey goto out; 1047e47937d1SCarl Delsey 1048e47937d1SCarl Delsey if (val != nt->max_qps) 1049e47937d1SCarl Delsey goto out; 1050e47937d1SCarl Delsey 1051e47937d1SCarl Delsey rc = ntb_read_local_spad(ntb, IF_NTB_MW0_SZ, &val); 1052e47937d1SCarl Delsey if (rc != 0) 1053e47937d1SCarl Delsey goto out; 1054e47937d1SCarl Delsey 1055e47937d1SCarl Delsey if (val == 0) 1056e47937d1SCarl Delsey goto out; 1057e47937d1SCarl Delsey 1058e47937d1SCarl Delsey rc = ntb_set_mw(nt, 0, val); 1059e47937d1SCarl Delsey if (rc != 0) 1060e47937d1SCarl Delsey return; 1061e47937d1SCarl Delsey 1062e47937d1SCarl Delsey rc = ntb_read_local_spad(ntb, IF_NTB_MW1_SZ, &val); 1063e47937d1SCarl Delsey if (rc != 0) 1064e47937d1SCarl Delsey goto out; 1065e47937d1SCarl Delsey 1066e47937d1SCarl Delsey if (val == 0) 1067e47937d1SCarl Delsey goto out; 1068e47937d1SCarl Delsey 1069e47937d1SCarl Delsey rc = ntb_set_mw(nt, 1, val); 1070e47937d1SCarl Delsey if (rc != 0) 1071e47937d1SCarl Delsey return; 1072e47937d1SCarl Delsey 1073e47937d1SCarl Delsey nt->transport_link = NTB_LINK_UP; 1074e47937d1SCarl Delsey 1075e47937d1SCarl Delsey for (i = 0; i < nt->max_qps; i++) { 1076e47937d1SCarl Delsey qp = &nt->qps[i]; 1077e47937d1SCarl Delsey 1078e47937d1SCarl Delsey ntb_transport_setup_qp_mw(nt, i); 1079e47937d1SCarl Delsey 1080e47937d1SCarl Delsey if (qp->client_ready == NTB_LINK_UP) 1081e47937d1SCarl Delsey callout_reset(&qp->link_work, 0, ntb_qp_link_work, qp); 1082e47937d1SCarl Delsey } 1083e47937d1SCarl Delsey 1084e47937d1SCarl Delsey return; 1085e47937d1SCarl Delsey 1086e47937d1SCarl Delsey out: 1087e47937d1SCarl Delsey if (ntb_query_link_status(ntb)) 1088e47937d1SCarl Delsey callout_reset(&nt->link_work, 1089e47937d1SCarl Delsey NTB_LINK_DOWN_TIMEOUT * hz / 1000, ntb_transport_link_work, nt); 1090e47937d1SCarl Delsey } 1091e47937d1SCarl Delsey 1092e47937d1SCarl Delsey static int 1093e47937d1SCarl Delsey ntb_set_mw(struct ntb_netdev *nt, int num_mw, unsigned int size) 1094e47937d1SCarl Delsey { 1095e47937d1SCarl Delsey struct ntb_transport_mw *mw = &nt->mw[num_mw]; 1096e47937d1SCarl Delsey 1097e47937d1SCarl Delsey /* Alloc memory for receiving data. Must be 4k aligned */ 1098e47937d1SCarl Delsey mw->size = size; 1099e47937d1SCarl Delsey 1100e47937d1SCarl Delsey mw->virt_addr = contigmalloc(mw->size, M_NTB_IF, M_ZERO, 0, 1101e47937d1SCarl Delsey BUS_SPACE_MAXADDR, mw->size, 0); 1102e47937d1SCarl Delsey if (mw->virt_addr == NULL) { 1103e47937d1SCarl Delsey printf("ntb: Unable to allocate MW buffer of size %d\n", 1104e47937d1SCarl Delsey (int)mw->size); 1105e47937d1SCarl Delsey return (ENOMEM); 1106e47937d1SCarl Delsey } 1107e47937d1SCarl Delsey /* TODO: replace with bus_space_* functions */ 1108e47937d1SCarl Delsey mw->dma_addr = vtophys(mw->virt_addr); 1109e47937d1SCarl Delsey 1110e47937d1SCarl Delsey /* Notify HW the memory location of the receive buffer */ 1111e47937d1SCarl Delsey ntb_set_mw_addr(nt->ntb, num_mw, mw->dma_addr); 1112e47937d1SCarl Delsey 1113e47937d1SCarl Delsey return (0); 1114e47937d1SCarl Delsey } 1115e47937d1SCarl Delsey 1116e47937d1SCarl Delsey static void 1117e47937d1SCarl Delsey ntb_transport_setup_qp_mw(struct ntb_netdev *nt, unsigned int qp_num) 1118e47937d1SCarl Delsey { 1119e47937d1SCarl Delsey struct ntb_transport_qp *qp = &nt->qps[qp_num]; 1120e47937d1SCarl Delsey void *offset; 1121e47937d1SCarl Delsey unsigned int rx_size, num_qps_mw; 1122e47937d1SCarl Delsey uint8_t mw_num = QP_TO_MW(qp_num); 1123e47937d1SCarl Delsey unsigned int i; 1124e47937d1SCarl Delsey 1125e47937d1SCarl Delsey if (nt->max_qps % NTB_NUM_MW && mw_num < nt->max_qps % NTB_NUM_MW) 1126e47937d1SCarl Delsey num_qps_mw = nt->max_qps / NTB_NUM_MW + 1; 1127e47937d1SCarl Delsey else 1128e47937d1SCarl Delsey num_qps_mw = nt->max_qps / NTB_NUM_MW; 1129e47937d1SCarl Delsey 1130e47937d1SCarl Delsey rx_size = (unsigned int) nt->mw[mw_num].size / num_qps_mw; 1131e47937d1SCarl Delsey qp->remote_rx_info = (void *)((uint8_t *)nt->mw[mw_num].virt_addr + 1132e47937d1SCarl Delsey (qp_num / NTB_NUM_MW * rx_size)); 1133e47937d1SCarl Delsey rx_size -= sizeof(struct ntb_rx_info); 1134e47937d1SCarl Delsey 1135e47937d1SCarl Delsey qp->rx_buff = qp->remote_rx_info + sizeof(struct ntb_rx_info); 1136e47937d1SCarl Delsey qp->rx_max_frame = min(transport_mtu + sizeof(struct ntb_payload_header), 1137e47937d1SCarl Delsey rx_size); 1138e47937d1SCarl Delsey qp->rx_max_entry = rx_size / qp->rx_max_frame; 1139e47937d1SCarl Delsey qp->rx_index = 0; 1140e47937d1SCarl Delsey qp->tx_index = 0; 1141e47937d1SCarl Delsey 1142e47937d1SCarl Delsey qp->remote_rx_info->entry = qp->rx_max_entry; 1143e47937d1SCarl Delsey 1144e47937d1SCarl Delsey /* setup the hdr offsets with 0's */ 1145e47937d1SCarl Delsey for (i = 0; i < qp->rx_max_entry; i++) { 1146e47937d1SCarl Delsey offset = (void *)((uint8_t *)qp->rx_buff + 1147e47937d1SCarl Delsey qp->rx_max_frame * (i + 1) - 1148e47937d1SCarl Delsey sizeof(struct ntb_payload_header)); 1149e47937d1SCarl Delsey memset(offset, 0, sizeof(struct ntb_payload_header)); 1150e47937d1SCarl Delsey } 1151e47937d1SCarl Delsey 1152e47937d1SCarl Delsey qp->rx_pkts = 0; 1153e47937d1SCarl Delsey qp->tx_pkts = 0; 1154e47937d1SCarl Delsey } 1155e47937d1SCarl Delsey 1156e47937d1SCarl Delsey static void 1157e47937d1SCarl Delsey ntb_qp_link_work(void *arg) 1158e47937d1SCarl Delsey { 1159e47937d1SCarl Delsey struct ntb_transport_qp *qp = arg; 1160e47937d1SCarl Delsey struct ntb_softc *ntb = qp->ntb; 1161e47937d1SCarl Delsey struct ntb_netdev *nt = qp->transport; 1162e47937d1SCarl Delsey int rc, val; 1163e47937d1SCarl Delsey 1164e47937d1SCarl Delsey 1165e47937d1SCarl Delsey rc = ntb_read_remote_spad(ntb, IF_NTB_QP_LINKS, &val); 1166e47937d1SCarl Delsey if (rc != 0) 1167e47937d1SCarl Delsey return; 1168e47937d1SCarl Delsey 1169e47937d1SCarl Delsey rc = ntb_write_remote_spad(ntb, IF_NTB_QP_LINKS, val | 1 << qp->qp_num); 1170e47937d1SCarl Delsey 1171e47937d1SCarl Delsey /* query remote spad for qp ready bits */ 1172e47937d1SCarl Delsey rc = ntb_read_local_spad(ntb, IF_NTB_QP_LINKS, &val); 1173e47937d1SCarl Delsey 1174e47937d1SCarl Delsey /* See if the remote side is up */ 1175e47937d1SCarl Delsey if ((1 << qp->qp_num & val) != 0) { 1176e47937d1SCarl Delsey qp->qp_link = NTB_LINK_UP; 1177e47937d1SCarl Delsey if (qp->event_handler != NULL) 1178e47937d1SCarl Delsey qp->event_handler(qp->cb_data, NTB_LINK_UP); 1179e47937d1SCarl Delsey } else if (nt->transport_link == NTB_LINK_UP) { 1180e47937d1SCarl Delsey callout_reset(&qp->link_work, 1181e47937d1SCarl Delsey NTB_LINK_DOWN_TIMEOUT * hz / 1000, ntb_qp_link_work, qp); 1182e47937d1SCarl Delsey } 1183e47937d1SCarl Delsey } 1184e47937d1SCarl Delsey 1185e47937d1SCarl Delsey /* Link down event*/ 1186e47937d1SCarl Delsey static void 1187e47937d1SCarl Delsey ntb_transport_link_cleanup(struct ntb_netdev *nt) 1188e47937d1SCarl Delsey { 1189e47937d1SCarl Delsey int i; 1190e47937d1SCarl Delsey 1191e47937d1SCarl Delsey if (nt->transport_link == NTB_LINK_DOWN) 1192e47937d1SCarl Delsey callout_drain(&nt->link_work); 1193e47937d1SCarl Delsey else 1194e47937d1SCarl Delsey nt->transport_link = NTB_LINK_DOWN; 1195e47937d1SCarl Delsey 1196e47937d1SCarl Delsey /* Pass along the info to any clients */ 1197e47937d1SCarl Delsey for (i = 0; i < nt->max_qps; i++) 1198e47937d1SCarl Delsey if (!test_bit(i, &nt->qp_bitmap)) 1199e47937d1SCarl Delsey ntb_qp_link_down(&nt->qps[i]); 1200e47937d1SCarl Delsey 1201e47937d1SCarl Delsey /* 1202e47937d1SCarl Delsey * The scratchpad registers keep the values if the remote side 1203e47937d1SCarl Delsey * goes down, blast them now to give them a sane value the next 1204e47937d1SCarl Delsey * time they are accessed 1205e47937d1SCarl Delsey */ 1206e47937d1SCarl Delsey for (i = 0; i < IF_NTB_MAX_SPAD; i++) 1207e47937d1SCarl Delsey ntb_write_local_spad(nt->ntb, i, 0); 1208e47937d1SCarl Delsey } 1209e47937d1SCarl Delsey 1210e47937d1SCarl Delsey 1211e47937d1SCarl Delsey static void 1212e47937d1SCarl Delsey ntb_qp_link_down(struct ntb_transport_qp *qp) 1213e47937d1SCarl Delsey { 1214e47937d1SCarl Delsey 1215e47937d1SCarl Delsey ntb_qp_link_cleanup(qp); 1216e47937d1SCarl Delsey } 1217e47937d1SCarl Delsey 1218e47937d1SCarl Delsey static void 1219e47937d1SCarl Delsey ntb_qp_link_cleanup(struct ntb_transport_qp *qp) 1220e47937d1SCarl Delsey { 1221e47937d1SCarl Delsey struct ntb_netdev *nt = qp->transport; 1222e47937d1SCarl Delsey 1223e47937d1SCarl Delsey if (qp->qp_link == NTB_LINK_DOWN) { 1224e47937d1SCarl Delsey callout_drain(&qp->link_work); 1225e47937d1SCarl Delsey return; 1226e47937d1SCarl Delsey } 1227e47937d1SCarl Delsey 1228e47937d1SCarl Delsey if (qp->event_handler != NULL) 1229e47937d1SCarl Delsey qp->event_handler(qp->cb_data, NTB_LINK_DOWN); 1230e47937d1SCarl Delsey 1231e47937d1SCarl Delsey qp->qp_link = NTB_LINK_DOWN; 1232e47937d1SCarl Delsey 1233e47937d1SCarl Delsey if (nt->transport_link == NTB_LINK_UP) 1234e47937d1SCarl Delsey callout_reset(&qp->link_work, 1235e47937d1SCarl Delsey NTB_LINK_DOWN_TIMEOUT * hz / 1000, ntb_qp_link_work, qp); 1236e47937d1SCarl Delsey } 1237e47937d1SCarl Delsey 1238e47937d1SCarl Delsey /* Link commanded down */ 1239e47937d1SCarl Delsey /** 1240e47937d1SCarl Delsey * ntb_transport_link_down - Notify NTB transport to no longer enqueue data 1241e47937d1SCarl Delsey * @qp: NTB transport layer queue to be disabled 1242e47937d1SCarl Delsey * 1243e47937d1SCarl Delsey * Notify NTB transport layer of client's desire to no longer receive data on 1244e47937d1SCarl Delsey * transport queue specified. It is the client's responsibility to ensure all 1245e47937d1SCarl Delsey * entries on queue are purged or otherwise handled appropraitely. 1246e47937d1SCarl Delsey */ 1247e47937d1SCarl Delsey static void 1248e47937d1SCarl Delsey ntb_transport_link_down(struct ntb_transport_qp *qp) 1249e47937d1SCarl Delsey { 1250e47937d1SCarl Delsey int rc, val; 1251e47937d1SCarl Delsey 1252e47937d1SCarl Delsey if (qp == NULL) 1253e47937d1SCarl Delsey return; 1254e47937d1SCarl Delsey 1255e47937d1SCarl Delsey qp->client_ready = NTB_LINK_DOWN; 1256e47937d1SCarl Delsey 1257e47937d1SCarl Delsey rc = ntb_read_remote_spad(qp->ntb, IF_NTB_QP_LINKS, &val); 1258e47937d1SCarl Delsey if (rc != 0) 1259e47937d1SCarl Delsey return; 1260e47937d1SCarl Delsey 1261e47937d1SCarl Delsey rc = ntb_write_remote_spad(qp->ntb, IF_NTB_QP_LINKS, 1262e47937d1SCarl Delsey val & ~(1 << qp->qp_num)); 1263e47937d1SCarl Delsey 1264e47937d1SCarl Delsey if (qp->qp_link == NTB_LINK_UP) 1265e47937d1SCarl Delsey ntb_send_link_down(qp); 1266e47937d1SCarl Delsey else 1267e47937d1SCarl Delsey callout_drain(&qp->link_work); 1268e47937d1SCarl Delsey 1269e47937d1SCarl Delsey } 1270e47937d1SCarl Delsey 1271e47937d1SCarl Delsey static void 1272e47937d1SCarl Delsey ntb_send_link_down(struct ntb_transport_qp *qp) 1273e47937d1SCarl Delsey { 1274e47937d1SCarl Delsey struct ntb_queue_entry *entry; 1275e47937d1SCarl Delsey int i, rc; 1276e47937d1SCarl Delsey 1277e47937d1SCarl Delsey if (qp->qp_link == NTB_LINK_DOWN) 1278e47937d1SCarl Delsey return; 1279e47937d1SCarl Delsey 1280e47937d1SCarl Delsey qp->qp_link = NTB_LINK_DOWN; 1281e47937d1SCarl Delsey 1282e47937d1SCarl Delsey for (i = 0; i < NTB_LINK_DOWN_TIMEOUT; i++) { 1283e47937d1SCarl Delsey entry = ntb_list_rm(&qp->ntb_tx_free_q_lock, &qp->tx_free_q); 1284e47937d1SCarl Delsey if (entry != NULL) 1285e47937d1SCarl Delsey break; 1286e47937d1SCarl Delsey pause("NTB Wait for link down", hz / 10); 1287e47937d1SCarl Delsey } 1288e47937d1SCarl Delsey 1289e47937d1SCarl Delsey if (entry == NULL) 1290e47937d1SCarl Delsey return; 1291e47937d1SCarl Delsey 1292e47937d1SCarl Delsey entry->cb_data = NULL; 1293e47937d1SCarl Delsey entry->buf = NULL; 1294e47937d1SCarl Delsey entry->len = 0; 1295e47937d1SCarl Delsey entry->flags = IF_NTB_LINK_DOWN_FLAG; 1296e47937d1SCarl Delsey 1297e47937d1SCarl Delsey mtx_lock(&qp->transport->tx_lock); 1298e47937d1SCarl Delsey rc = ntb_process_tx(qp, entry); 1299e47937d1SCarl Delsey if (rc != 0) 1300e47937d1SCarl Delsey printf("ntb: Failed to send link down\n"); 1301e47937d1SCarl Delsey mtx_unlock(&qp->transport->tx_lock); 1302e47937d1SCarl Delsey } 1303e47937d1SCarl Delsey 1304e47937d1SCarl Delsey 1305e47937d1SCarl Delsey /* List Management */ 1306e47937d1SCarl Delsey 1307e47937d1SCarl Delsey static void 1308e47937d1SCarl Delsey ntb_list_add(struct mtx *lock, struct ntb_queue_entry *entry, 1309e47937d1SCarl Delsey struct ntb_queue_list *list) 1310e47937d1SCarl Delsey { 1311e47937d1SCarl Delsey 1312e47937d1SCarl Delsey mtx_lock_spin(lock); 1313e47937d1SCarl Delsey STAILQ_INSERT_TAIL(list, entry, entry); 1314e47937d1SCarl Delsey mtx_unlock_spin(lock); 1315e47937d1SCarl Delsey } 1316e47937d1SCarl Delsey 1317e47937d1SCarl Delsey static struct ntb_queue_entry * 1318e47937d1SCarl Delsey ntb_list_rm(struct mtx *lock, struct ntb_queue_list *list) 1319e47937d1SCarl Delsey { 1320e47937d1SCarl Delsey struct ntb_queue_entry *entry; 1321e47937d1SCarl Delsey 1322e47937d1SCarl Delsey mtx_lock_spin(lock); 1323e47937d1SCarl Delsey if (STAILQ_EMPTY(list)) { 1324e47937d1SCarl Delsey entry = NULL; 1325e47937d1SCarl Delsey goto out; 1326e47937d1SCarl Delsey } 1327e47937d1SCarl Delsey entry = STAILQ_FIRST(list); 1328e47937d1SCarl Delsey STAILQ_REMOVE_HEAD(list, entry); 1329e47937d1SCarl Delsey out: 1330e47937d1SCarl Delsey mtx_unlock_spin(lock); 1331e47937d1SCarl Delsey 1332e47937d1SCarl Delsey return (entry); 1333e47937d1SCarl Delsey } 1334e47937d1SCarl Delsey 1335e47937d1SCarl Delsey /* Helper functions */ 1336e47937d1SCarl Delsey /* TODO: This too should really be part of the kernel */ 1337e47937d1SCarl Delsey #define EUI48_MULTICAST 1 << 0 1338e47937d1SCarl Delsey #define EUI48_LOCALLY_ADMINISTERED 1 << 1 1339e47937d1SCarl Delsey static void 1340e47937d1SCarl Delsey create_random_local_eui48(u_char *eaddr) 1341e47937d1SCarl Delsey { 1342e47937d1SCarl Delsey static uint8_t counter = 0; 1343e47937d1SCarl Delsey uint32_t seed = ticks; 1344e47937d1SCarl Delsey 1345e47937d1SCarl Delsey eaddr[0] = EUI48_LOCALLY_ADMINISTERED; 1346e47937d1SCarl Delsey memcpy(&eaddr[1], &seed, sizeof(uint32_t)); 1347e47937d1SCarl Delsey eaddr[5] = counter++; 1348e47937d1SCarl Delsey } 1349e47937d1SCarl Delsey 1350e47937d1SCarl Delsey /** 1351e47937d1SCarl Delsey * ntb_transport_max_size - Query the max payload size of a qp 1352e47937d1SCarl Delsey * @qp: NTB transport layer queue to be queried 1353e47937d1SCarl Delsey * 1354e47937d1SCarl Delsey * Query the maximum payload size permissible on the given qp 1355e47937d1SCarl Delsey * 1356e47937d1SCarl Delsey * RETURNS: the max payload size of a qp 1357e47937d1SCarl Delsey */ 1358e47937d1SCarl Delsey static unsigned int 1359e47937d1SCarl Delsey ntb_transport_max_size(struct ntb_transport_qp *qp) 1360e47937d1SCarl Delsey { 1361e47937d1SCarl Delsey 1362e47937d1SCarl Delsey if (qp == NULL) 1363e47937d1SCarl Delsey return (0); 1364e47937d1SCarl Delsey 1365e47937d1SCarl Delsey return (qp->tx_max_frame - sizeof(struct ntb_payload_header)); 1366e47937d1SCarl Delsey } 1367