drivers/scsi/bfa/bfa_port.c

   1 /*
   2  * Copyright (c) 2005-2009 Brocade Communications Systems, Inc.
   3  * All rights reserved
   4  * www.brocade.com
   5  *
   6  * Linux driver for Brocade Fibre Channel Host Bus Adapter.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License (GPL) Version 2 as
  10  * published by the Free Software Foundation
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  */
  17
  18 #include <defs/bfa_defs_port.h>
  19 #include <cs/bfa_trc.h>
  20 #include <cs/bfa_log.h>
  21 #include <cs/bfa_debug.h>
  22 #include <port/bfa_port.h>
  23 #include <bfi/bfi.h>
  24 #include <bfi/bfi_port.h>
  25 #include <bfa_ioc.h>
  26 #include <cna/bfa_cna_trcmod.h>
  27
  28 BFA_TRC_FILE(CNA, PORT);
  29
  30 #define bfa_ioc_portid(__ioc) ((__ioc)->port_id)
  31 #define bfa_lpuid(__arg) bfa_ioc_portid(&(__arg)->ioc)
  32
  33 static void
  34 bfa_port_stats_swap(struct bfa_port_s *port, union bfa_pport_stats_u *stats)
  35 {
  36         u32       *dip = (u32 *) stats;
  37         u32        t0, t1;
  38         int             i;
  39
  40         for (i = 0; i < sizeof(union bfa_pport_stats_u) / sizeof(u32);
  41              i += 2) {
  42                 t0 = dip[i];
  43                 t1 = dip[i + 1];
  44 #ifdef __BIGENDIAN
  45                 dip[i] = bfa_os_ntohl(t0);
  46                 dip[i + 1] = bfa_os_ntohl(t1);
  47 #else
  48                 dip[i] = bfa_os_ntohl(t1);
  49                 dip[i + 1] = bfa_os_ntohl(t0);
  50 #endif
  51         }
  52
  53     /** todo
  54      * QoS stats r also swapped as 64bit; that structure also
  55      * has to use 64 bit counters
  56      */
  57 }
  58
  59 /**
  60  * bfa_port_enable_isr()
  61  *
  62  *
  63  * @param[in] port - Pointer to the port module
  64  *            status - Return status from the f/w
  65  *
  66  * @return void
  67  */
  68 static void
  69 bfa_port_enable_isr(struct bfa_port_s *port, bfa_status_t status)
  70 {
  71         bfa_assert(0);
  72 }
  73
  74 /**
  75  * bfa_port_disable_isr()
  76  *
  77  *
  78  * @param[in] port - Pointer to the port module
  79  *            status - Return status from the f/w
  80  *
  81  * @return void
  82  */
  83 static void
  84 bfa_port_disable_isr(struct bfa_port_s *port, bfa_status_t status)
  85 {
  86         bfa_assert(0);
  87 }
  88
  89 /**
  90  * bfa_port_get_stats_isr()
  91  *
  92  *
  93  * @param[in] port - Pointer to the Port module
  94  *            status - Return status from the f/w
  95  *
  96  * @return void
  97  */
  98 static void
  99 bfa_port_get_stats_isr(struct bfa_port_s *port, bfa_status_t status)
 100 {
 101         port->stats_status = status;
 102         port->stats_busy = BFA_FALSE;
 103
 104         if (status == BFA_STATUS_OK) {
 105                 memcpy(port->stats, port->stats_dma.kva,
 106                        sizeof(union bfa_pport_stats_u));
 107                 bfa_port_stats_swap(port, port->stats);
 108         }
 109
 110         if (port->stats_cbfn) {
 111                 port->stats_cbfn(port->stats_cbarg, status);
 112                 port->stats_cbfn = NULL;
 113         }
 114 }
 115
 116 /**
 117  * bfa_port_clear_stats_isr()
 118  *
 119  *
 120  * @param[in] port - Pointer to the Port module
 121  *            status - Return status from the f/w
 122  *
 123  * @return void
 124  */
 125 static void
 126 bfa_port_clear_stats_isr(struct bfa_port_s *port, bfa_status_t status)
 127 {
 128         port->stats_status = status;
 129         port->stats_busy = BFA_FALSE;
 130
 131         if (port->stats_cbfn) {
 132                 port->stats_cbfn(port->stats_cbarg, status);
 133                 port->stats_cbfn = NULL;
 134         }
 135 }
 136
 137 /**
 138  * bfa_port_isr()
 139  *
 140  *
 141  * @param[in] Pointer to the Port module data structure.
 142  *
 143  * @return void
 144  */
 145 static void
 146 bfa_port_isr(void *cbarg, struct bfi_mbmsg_s *m)
 147 {
 148         struct bfa_port_s *port = (struct bfa_port_s *)cbarg;
 149         union bfi_port_i2h_msg_u *i2hmsg;
 150
 151         i2hmsg = (union bfi_port_i2h_msg_u *)m;
 152         bfa_trc(port, m->mh.msg_id);
 153
 154         switch (m->mh.msg_id) {
 155         case BFI_PORT_I2H_ENABLE_RSP:
 156                 if (port->endis_pending == BFA_FALSE)
 157                         break;
 158                 bfa_port_enable_isr(port, i2hmsg->enable_rsp.status);
 159                 break;
 160
 161         case BFI_PORT_I2H_DISABLE_RSP:
 162                 if (port->endis_pending == BFA_FALSE)
 163                         break;
 164                 bfa_port_disable_isr(port, i2hmsg->disable_rsp.status);
 165                 break;
 166
 167         case BFI_PORT_I2H_GET_STATS_RSP:
 168                 /*
 169                  * Stats busy flag is still set? (may be cmd timed out)
 170                  */
 171                 if (port->stats_busy == BFA_FALSE)
 172                         break;
 173                 bfa_port_get_stats_isr(port, i2hmsg->getstats_rsp.status);
 174                 break;
 175
 176         case BFI_PORT_I2H_CLEAR_STATS_RSP:
 177                 if (port->stats_busy == BFA_FALSE)
 178                         break;
 179                 bfa_port_clear_stats_isr(port, i2hmsg->clearstats_rsp.status);
 180                 break;
 181
 182         default:
 183                 bfa_assert(0);
 184         }
 185 }
 186
 187 /**
 188  * bfa_port_meminfo()
 189  *
 190  *
 191  * @param[in] void
 192  *
 193  * @return Size of DMA region
 194  */
 195 u32
 196 bfa_port_meminfo(void)
 197 {
 198         return BFA_ROUNDUP(sizeof(union bfa_pport_stats_u), BFA_DMA_ALIGN_SZ);
 199 }
 200
 201 /**
 202  * bfa_port_mem_claim()
 203  *
 204  *
 205  * @param[in] port Port module pointer
 206  *            dma_kva Kernel Virtual Address of Port DMA Memory
 207  *            dma_pa  Physical Address of Port DMA Memory
 208  *
 209  * @return void
 210  */
 211 void
 212 bfa_port_mem_claim(struct bfa_port_s *port, u8 *dma_kva, u64 dma_pa)
 213 {
 214         port->stats_dma.kva = dma_kva;
 215         port->stats_dma.pa = dma_pa;
 216 }
 217
 218 /**
 219  * bfa_port_enable()
 220  *
 221  *   Send the Port enable request to the f/w
 222  *
 223  * @param[in] Pointer to the Port module data structure.
 224  *
 225  * @return Status
 226  */
 227 bfa_status_t
 228 bfa_port_enable(struct bfa_port_s *port, bfa_port_endis_cbfn_t cbfn,
 229                 void *cbarg)
 230 {
 231         struct bfi_port_generic_req_s *m;
 232
 233         /** todo Not implemented */
 234         bfa_assert(0);
 235
 236         if (!bfa_ioc_is_operational(port->ioc)) {
 237                 bfa_trc(port, BFA_STATUS_IOC_FAILURE);
 238                 return BFA_STATUS_IOC_FAILURE;
 239         }
 240
 241         if (port->endis_pending) {
 242                 bfa_trc(port, BFA_STATUS_DEVBUSY);
 243                 return BFA_STATUS_DEVBUSY;
 244         }
 245
 246         m = (struct bfi_port_generic_req_s *)port->endis_mb.msg;
 247
 248         port->msgtag++;
 249         port->endis_cbfn = cbfn;
 250         port->endis_cbarg = cbarg;
 251         port->endis_pending = BFA_TRUE;
 252
 253         bfi_h2i_set(m->mh, BFI_MC_PORT, BFI_PORT_H2I_ENABLE_REQ,
 254                     bfa_ioc_portid(port->ioc));
 255         bfa_ioc_mbox_queue(port->ioc, &port->endis_mb);
 256
 257         return BFA_STATUS_OK;
 258 }
 259
 260 /**
 261  * bfa_port_disable()
 262  *
 263  *   Send the Port disable request to the f/w
 264  *
 265  * @param[in] Pointer to the Port module data structure.
 266  *
 267  * @return Status
 268  */
 269 bfa_status_t
 270 bfa_port_disable(struct bfa_port_s *port, bfa_port_endis_cbfn_t cbfn,
 271                  void *cbarg)
 272 {
 273         struct bfi_port_generic_req_s *m;
 274
 275         /** todo Not implemented */
 276         bfa_assert(0);
 277
 278         if (!bfa_ioc_is_operational(port->ioc)) {
 279                 bfa_trc(port, BFA_STATUS_IOC_FAILURE);
 280                 return BFA_STATUS_IOC_FAILURE;
 281         }
 282
 283         if (port->endis_pending) {
 284                 bfa_trc(port, BFA_STATUS_DEVBUSY);
 285                 return BFA_STATUS_DEVBUSY;
 286         }
 287
 288         m = (struct bfi_port_generic_req_s *)port->endis_mb.msg;
 289
 290         port->msgtag++;
 291         port->endis_cbfn = cbfn;
 292         port->endis_cbarg = cbarg;
 293         port->endis_pending = BFA_TRUE;
 294
 295         bfi_h2i_set(m->mh, BFI_MC_PORT, BFI_PORT_H2I_DISABLE_REQ,
 296                     bfa_ioc_portid(port->ioc));
 297         bfa_ioc_mbox_queue(port->ioc, &port->endis_mb);
 298
 299         return BFA_STATUS_OK;
 300 }
 301
 302 /**
 303  * bfa_port_get_stats()
 304  *
 305  *   Send the request to the f/w to fetch Port statistics.
 306  *
 307  * @param[in] Pointer to the Port module data structure.
 308  *
 309  * @return Status
 310  */
 311 bfa_status_t
 312 bfa_port_get_stats(struct bfa_port_s *port, union bfa_pport_stats_u *stats,
 313                    bfa_port_stats_cbfn_t cbfn, void *cbarg)
 314 {
 315         struct bfi_port_get_stats_req_s *m;
 316
 317         if (!bfa_ioc_is_operational(port->ioc)) {
 318                 bfa_trc(port, BFA_STATUS_IOC_FAILURE);
 319                 return BFA_STATUS_IOC_FAILURE;
 320         }
 321
 322         if (port->stats_busy) {
 323                 bfa_trc(port, BFA_STATUS_DEVBUSY);
 324                 return BFA_STATUS_DEVBUSY;
 325         }
 326
 327         m = (struct bfi_port_get_stats_req_s *)port->stats_mb.msg;
 328
 329         port->stats = stats;
 330         port->stats_cbfn = cbfn;
 331         port->stats_cbarg = cbarg;
 332         port->stats_busy = BFA_TRUE;
 333         bfa_dma_be_addr_set(m->dma_addr, port->stats_dma.pa);
 334
 335         bfi_h2i_set(m->mh, BFI_MC_PORT, BFI_PORT_H2I_GET_STATS_REQ,
 336                     bfa_ioc_portid(port->ioc));
 337         bfa_ioc_mbox_queue(port->ioc, &port->stats_mb);
 338
 339         return BFA_STATUS_OK;
 340 }
 341
 342 /**
 343  * bfa_port_clear_stats()
 344  *
 345  *
 346  * @param[in] Pointer to the Port module data structure.
 347  *
 348  * @return Status
 349  */
 350 bfa_status_t
 351 bfa_port_clear_stats(struct bfa_port_s *port, bfa_port_stats_cbfn_t cbfn,
 352                      void *cbarg)
 353 {
 354         struct bfi_port_generic_req_s *m;
 355
 356         if (!bfa_ioc_is_operational(port->ioc)) {
 357                 bfa_trc(port, BFA_STATUS_IOC_FAILURE);
 358                 return BFA_STATUS_IOC_FAILURE;
 359         }
 360
 361         if (port->stats_busy) {
 362                 bfa_trc(port, BFA_STATUS_DEVBUSY);
 363                 return BFA_STATUS_DEVBUSY;
 364         }
 365
 366         m = (struct bfi_port_generic_req_s *)port->stats_mb.msg;
 367
 368         port->stats_cbfn = cbfn;
 369         port->stats_cbarg = cbarg;
 370         port->stats_busy = BFA_TRUE;
 371
 372         bfi_h2i_set(m->mh, BFI_MC_PORT, BFI_PORT_H2I_CLEAR_STATS_REQ,
 373                     bfa_ioc_portid(port->ioc));
 374         bfa_ioc_mbox_queue(port->ioc, &port->stats_mb);
 375
 376         return BFA_STATUS_OK;
 377 }
 378
 379 /**
 380  * bfa_port_hbfail()
 381  *
 382  *
 383  * @param[in] Pointer to the Port module data structure.
 384  *
 385  * @return void
 386  */
 387 void
 388 bfa_port_hbfail(void *arg)
 389 {
 390         struct bfa_port_s *port = (struct bfa_port_s *)arg;
 391
 392         /*
 393          * Fail any pending get_stats/clear_stats requests
 394          */
 395         if (port->stats_busy) {
 396                 if (port->stats_cbfn)
 397                         port->stats_cbfn(port->dev, BFA_STATUS_FAILED);
 398                 port->stats_cbfn = NULL;
 399                 port->stats_busy = BFA_FALSE;
 400         }
 401
 402         /*
 403          * Clear any enable/disable is pending
 404          */
 405         if (port->endis_pending) {
 406                 if (port->endis_cbfn)
 407                         port->endis_cbfn(port->dev, BFA_STATUS_FAILED);
 408                 port->endis_cbfn = NULL;
 409                 port->endis_pending = BFA_FALSE;
 410         }
 411 }
 412
 413 /**
 414  * bfa_port_attach()
 415  *
 416  *
 417  * @param[in] port - Pointer to the Port module data structure
 418  *            ioc  - Pointer to the ioc module data structure
 419  *            dev  - Pointer to the device driver module data structure
 420  *                   The device driver specific mbox ISR functions have
 421  *                   this pointer as one of the parameters.
 422  *            trcmod -
 423  *            logmod -
 424  *
 425  * @return void
 426  */
 427 void
 428 bfa_port_attach(struct bfa_port_s *port, struct bfa_ioc_s *ioc, void *dev,
 429                 struct bfa_trc_mod_s *trcmod, struct bfa_log_mod_s *logmod)
 430 {
 431         bfa_assert(port);
 432
 433         port->dev = dev;
 434         port->ioc = ioc;
 435         port->trcmod = trcmod;
 436         port->logmod = logmod;
 437
 438         port->stats_busy = port->endis_pending = BFA_FALSE;
 439         port->stats_cbfn = port->endis_cbfn = NULL;
 440
 441         bfa_ioc_mbox_regisr(port->ioc, BFI_MC_PORT, bfa_port_isr, port);
 442         bfa_ioc_hbfail_init(&port->hbfail, bfa_port_hbfail, port);
 443         bfa_ioc_hbfail_register(port->ioc, &port->hbfail);
 444
 445         bfa_trc(port, 0);
 446 }
 447
 448 /**
 449  * bfa_port_detach()
 450  *
 451  *
 452  * @param[in] port - Pointer to the Port module data structure
 453  *
 454  * @return void
 455  */
 456 void
 457 bfa_port_detach(struct bfa_port_s *port)
 458 {
 459         bfa_trc(port, 0);
 460 }