drivers/net/ethernet/brocade/bna/bfa_cee.c

   1 /*
   2  * Linux network driver for Brocade Converged Network Adapter.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License (GPL) Version 2 as
   6  * published by the Free Software Foundation
   7  *
   8  * This program is distributed in the hope that it will be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  */
  13 /*
  14  * Copyright (c) 2005-2010 Brocade Communications Systems, Inc.
  15  * All rights reserved
  16  * www.brocade.com
  17  */
  18
  19 #include "bfa_cee.h"
  20 #include "bfi_cna.h"
  21 #include "bfa_ioc.h"
  22
  23 static void bfa_cee_format_lldp_cfg(struct bfa_cee_lldp_cfg *lldp_cfg);
  24 static void bfa_cee_format_cee_cfg(void *buffer);
  25
  26 static void
  27 bfa_cee_format_cee_cfg(void *buffer)
  28 {
  29         struct bfa_cee_attr *cee_cfg = buffer;
  30         bfa_cee_format_lldp_cfg(&cee_cfg->lldp_remote);
  31 }
  32
  33 static void
  34 bfa_cee_stats_swap(struct bfa_cee_stats *stats)
  35 {
  36         u32 *buffer = (u32 *)stats;
  37         int i;
  38
  39         for (i = 0; i < (sizeof(struct bfa_cee_stats) / sizeof(u32));
  40                 i++) {
  41                 buffer[i] = ntohl(buffer[i]);
  42         }
  43 }
  44
  45 static void
  46 bfa_cee_format_lldp_cfg(struct bfa_cee_lldp_cfg *lldp_cfg)
  47 {
  48         lldp_cfg->time_to_live =
  49                         ntohs(lldp_cfg->time_to_live);
  50         lldp_cfg->enabled_system_cap =
  51                         ntohs(lldp_cfg->enabled_system_cap);
  52 }
  53
  54 /**
  55  * bfa_cee_attr_meminfo()
  56  *
  57  * @brief Returns the size of the DMA memory needed by CEE attributes
  58  *
  59  * @param[in] void
  60  *
  61  * @return Size of DMA region
  62  */
  63 static u32
  64 bfa_cee_attr_meminfo(void)
  65 {
  66         return roundup(sizeof(struct bfa_cee_attr), BFA_DMA_ALIGN_SZ);
  67 }
  68 /**
  69  * bfa_cee_stats_meminfo()
  70  *
  71  * @brief Returns the size of the DMA memory needed by CEE stats
  72  *
  73  * @param[in] void
  74  *
  75  * @return Size of DMA region
  76  */
  77 static u32
  78 bfa_cee_stats_meminfo(void)
  79 {
  80         return roundup(sizeof(struct bfa_cee_stats), BFA_DMA_ALIGN_SZ);
  81 }
  82
  83 /**
  84  * bfa_cee_get_attr_isr()
  85  *
  86  * @brief CEE ISR for get-attributes responses from f/w
  87  *
  88  * @param[in] cee - Pointer to the CEE module
  89  *            status - Return status from the f/w
  90  *
  91  * @return void
  92  */
  93 static void
  94 bfa_cee_get_attr_isr(struct bfa_cee *cee, enum bfa_status status)
  95 {
  96         cee->get_attr_status = status;
  97         if (status == BFA_STATUS_OK) {
  98                 memcpy(cee->attr, cee->attr_dma.kva,
  99                     sizeof(struct bfa_cee_attr));
 100                 bfa_cee_format_cee_cfg(cee->attr);
 101         }
 102         cee->get_attr_pending = false;
 103         if (cee->cbfn.get_attr_cbfn)
 104                 cee->cbfn.get_attr_cbfn(cee->cbfn.get_attr_cbarg, status);
 105 }
 106
 107 /**
 108  * bfa_cee_get_attr_isr()
 109  *
 110  * @brief CEE ISR for get-stats responses from f/w
 111  *
 112  * @param[in] cee - Pointer to the CEE module
 113  *            status - Return status from the f/w
 114  *
 115  * @return void
 116  */
 117 static void
 118 bfa_cee_get_stats_isr(struct bfa_cee *cee, enum bfa_status status)
 119 {
 120         cee->get_stats_status = status;
 121         if (status == BFA_STATUS_OK) {
 122                 memcpy(cee->stats, cee->stats_dma.kva,
 123                         sizeof(struct bfa_cee_stats));
 124                 bfa_cee_stats_swap(cee->stats);
 125         }
 126         cee->get_stats_pending = false;
 127         if (cee->cbfn.get_stats_cbfn)
 128                 cee->cbfn.get_stats_cbfn(cee->cbfn.get_stats_cbarg, status);
 129 }
 130
 131 /**
 132  * bfa_cee_get_attr_isr()
 133  *
 134  * @brief CEE ISR for reset-stats responses from f/w
 135  *
 136  * @param[in] cee - Pointer to the CEE module
 137  *            status - Return status from the f/w
 138  *
 139  * @return void
 140  */
 141 static void
 142 bfa_cee_reset_stats_isr(struct bfa_cee *cee, enum bfa_status status)
 143 {
 144         cee->reset_stats_status = status;
 145         cee->reset_stats_pending = false;
 146         if (cee->cbfn.reset_stats_cbfn)
 147                 cee->cbfn.reset_stats_cbfn(cee->cbfn.reset_stats_cbarg, status);
 148 }
 149 /**
 150  * bfa_nw_cee_meminfo()
 151  *
 152  * @brief Returns the size of the DMA memory needed by CEE module
 153  *
 154  * @param[in] void
 155  *
 156  * @return Size of DMA region
 157  */
 158 u32
 159 bfa_nw_cee_meminfo(void)
 160 {
 161         return bfa_cee_attr_meminfo() + bfa_cee_stats_meminfo();
 162 }
 163
 164 /**
 165  * bfa_nw_cee_mem_claim()
 166  *
 167  * @brief Initialized CEE DMA Memory
 168  *
 169  * @param[in] cee CEE module pointer
 170  *            dma_kva Kernel Virtual Address of CEE DMA Memory
 171  *            dma_pa  Physical Address of CEE DMA Memory
 172  *
 173  * @return void
 174  */
 175 void
 176 bfa_nw_cee_mem_claim(struct bfa_cee *cee, u8 *dma_kva, u64 dma_pa)
 177 {
 178         cee->attr_dma.kva = dma_kva;
 179         cee->attr_dma.pa = dma_pa;
 180         cee->stats_dma.kva = dma_kva + bfa_cee_attr_meminfo();
 181         cee->stats_dma.pa = dma_pa + bfa_cee_attr_meminfo();
 182         cee->attr = (struct bfa_cee_attr *) dma_kva;
 183         cee->stats = (struct bfa_cee_stats *)
 184                 (dma_kva + bfa_cee_attr_meminfo());
 185 }
 186
 187 /**
 188  * bfa_cee_isrs()
 189  *
 190  * @brief Handles Mail-box interrupts for CEE module.
 191  *
 192  * @param[in] Pointer to the CEE module data structure.
 193  *
 194  * @return void
 195  */
 196
 197 static void
 198 bfa_cee_isr(void *cbarg, struct bfi_mbmsg *m)
 199 {
 200         union bfi_cee_i2h_msg_u *msg;
 201         struct bfi_cee_get_rsp *get_rsp;
 202         struct bfa_cee *cee = (struct bfa_cee *) cbarg;
 203         msg = (union bfi_cee_i2h_msg_u *) m;
 204         get_rsp = (struct bfi_cee_get_rsp *) m;
 205         switch (msg->mh.msg_id) {
 206         case BFI_CEE_I2H_GET_CFG_RSP:
 207                 bfa_cee_get_attr_isr(cee, get_rsp->cmd_status);
 208                 break;
 209         case BFI_CEE_I2H_GET_STATS_RSP:
 210                 bfa_cee_get_stats_isr(cee, get_rsp->cmd_status);
 211                 break;
 212         case BFI_CEE_I2H_RESET_STATS_RSP:
 213                 bfa_cee_reset_stats_isr(cee, get_rsp->cmd_status);
 214                 break;
 215         default:
 216                 BUG_ON(1);
 217         }
 218 }
 219
 220 /**
 221  * bfa_cee_notify()
 222  *
 223  * @brief CEE module heart-beat failure handler.
 224  * @brief CEE module IOC event handler.
 225  *
 226  * @param[in] IOC event type
 227  *
 228  * @return void
 229  */
 230
 231 static void
 232 bfa_cee_notify(void *arg, enum bfa_ioc_event event)
 233 {
 234         struct bfa_cee *cee;
 235         cee = (struct bfa_cee *) arg;
 236
 237         switch (event) {
 238         case BFA_IOC_E_DISABLED:
 239         case BFA_IOC_E_FAILED:
 240                 if (cee->get_attr_pending == true) {
 241                         cee->get_attr_status = BFA_STATUS_FAILED;
 242                         cee->get_attr_pending  = false;
 243                         if (cee->cbfn.get_attr_cbfn) {
 244                                 cee->cbfn.get_attr_cbfn(
 245                                         cee->cbfn.get_attr_cbarg,
 246                                         BFA_STATUS_FAILED);
 247                         }
 248                 }
 249                 if (cee->get_stats_pending == true) {
 250                         cee->get_stats_status = BFA_STATUS_FAILED;
 251                         cee->get_stats_pending  = false;
 252                         if (cee->cbfn.get_stats_cbfn) {
 253                                 cee->cbfn.get_stats_cbfn(
 254                                         cee->cbfn.get_stats_cbarg,
 255                                         BFA_STATUS_FAILED);
 256                         }
 257                 }
 258                 if (cee->reset_stats_pending == true) {
 259                         cee->reset_stats_status = BFA_STATUS_FAILED;
 260                         cee->reset_stats_pending  = false;
 261                         if (cee->cbfn.reset_stats_cbfn) {
 262                                 cee->cbfn.reset_stats_cbfn(
 263                                         cee->cbfn.reset_stats_cbarg,
 264                                         BFA_STATUS_FAILED);
 265                         }
 266                 }
 267                 break;
 268
 269         default:
 270                 break;
 271         }
 272 }
 273
 274 /**
 275  * bfa_nw_cee_attach()
 276  *
 277  * @brief CEE module-attach API
 278  *
 279  * @param[in] cee - Pointer to the CEE module data structure
 280  *            ioc - Pointer to the ioc module data structure
 281  *            dev - Pointer to the device driver module data structure
 282  *                  The device driver specific mbox ISR functions have
 283  *                  this pointer as one of the parameters.
 284  *
 285  * @return void
 286  */
 287 void
 288 bfa_nw_cee_attach(struct bfa_cee *cee, struct bfa_ioc *ioc,
 289                 void *dev)
 290 {
 291         BUG_ON(!(cee != NULL));
 292         cee->dev = dev;
 293         cee->ioc = ioc;
 294
 295         bfa_nw_ioc_mbox_regisr(cee->ioc, BFI_MC_CEE, bfa_cee_isr, cee);
 296         bfa_q_qe_init(&cee->ioc_notify);
 297         bfa_ioc_notify_init(&cee->ioc_notify, bfa_cee_notify, cee);
 298         bfa_nw_ioc_notify_register(cee->ioc, &cee->ioc_notify);
 299 }