drivers/scsi/bfa/bfa_hw_cb.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 <bfa_priv.h>
  19 #include <bfi/bfi_cbreg.h>
  20
  21 void
  22 bfa_hwcb_reginit(struct bfa_s *bfa)
  23 {
  24         struct bfa_iocfc_regs_s *bfa_regs = &bfa->iocfc.bfa_regs;
  25         bfa_os_addr_t           kva = bfa_ioc_bar0(&bfa->ioc);
  26         int                     i, q, fn = bfa_ioc_pcifn(&bfa->ioc);
  27
  28         if (fn == 0) {
  29                 bfa_regs->intr_status = (kva + HOSTFN0_INT_STATUS);
  30                 bfa_regs->intr_mask   = (kva + HOSTFN0_INT_MSK);
  31         } else {
  32                 bfa_regs->intr_status = (kva + HOSTFN1_INT_STATUS);
  33                 bfa_regs->intr_mask   = (kva + HOSTFN1_INT_MSK);
  34         }
  35
  36         for (i = 0; i < BFI_IOC_MAX_CQS; i++) {
  37                 /*
  38                  * CPE registers
  39                  */
  40                 q = CPE_Q_NUM(fn, i);
  41                 bfa_regs->cpe_q_pi[i] = (kva + CPE_Q_PI(q));
  42                 bfa_regs->cpe_q_ci[i] = (kva + CPE_Q_CI(q));
  43                 bfa_regs->cpe_q_depth[i] = (kva + CPE_Q_DEPTH(q));
  44
  45                 /*
  46                  * RME registers
  47                  */
  48                 q = CPE_Q_NUM(fn, i);
  49                 bfa_regs->rme_q_pi[i] = (kva + RME_Q_PI(q));
  50                 bfa_regs->rme_q_ci[i] = (kva + RME_Q_CI(q));
  51                 bfa_regs->rme_q_depth[i] = (kva + RME_Q_DEPTH(q));
  52         }
  53 }
  54
  55 void
  56 bfa_hwcb_rspq_ack(struct bfa_s *bfa, int rspq)
  57 {
  58 }
  59
  60 static void
  61 bfa_hwcb_rspq_ack_msix(struct bfa_s *bfa, int rspq)
  62 {
  63         bfa_reg_write(bfa->iocfc.bfa_regs.intr_status,
  64                 __HFN_INT_RME_Q0 << RME_Q_NUM(bfa_ioc_pcifn(&bfa->ioc), rspq));
  65 }
  66
  67 void
  68 bfa_hwcb_msix_getvecs(struct bfa_s *bfa, u32 *msix_vecs_bmap,
  69                  u32 *num_vecs, u32 *max_vec_bit)
  70 {
  71 #define __HFN_NUMINTS   13
  72         if (bfa_ioc_pcifn(&bfa->ioc) == 0) {
  73                 *msix_vecs_bmap = (__HFN_INT_CPE_Q0 | __HFN_INT_CPE_Q1 |
  74                                    __HFN_INT_CPE_Q2 | __HFN_INT_CPE_Q3 |
  75                                    __HFN_INT_RME_Q0 | __HFN_INT_RME_Q1 |
  76                                    __HFN_INT_RME_Q2 | __HFN_INT_RME_Q3 |
  77                                    __HFN_INT_MBOX_LPU0);
  78                 *max_vec_bit = __HFN_INT_MBOX_LPU0;
  79         } else {
  80                 *msix_vecs_bmap = (__HFN_INT_CPE_Q4 | __HFN_INT_CPE_Q5 |
  81                                    __HFN_INT_CPE_Q6 | __HFN_INT_CPE_Q7 |
  82                                    __HFN_INT_RME_Q4 | __HFN_INT_RME_Q5 |
  83                                    __HFN_INT_RME_Q6 | __HFN_INT_RME_Q7 |
  84                                    __HFN_INT_MBOX_LPU1);
  85                 *max_vec_bit = __HFN_INT_MBOX_LPU1;
  86         }
  87
  88         *msix_vecs_bmap |= (__HFN_INT_ERR_EMC | __HFN_INT_ERR_LPU0 |
  89                             __HFN_INT_ERR_LPU1 | __HFN_INT_ERR_PSS);
  90         *num_vecs = __HFN_NUMINTS;
  91 }
  92
  93 /**
  94  * No special setup required for crossbow -- vector assignments are implicit.
  95  */
  96 void
  97 bfa_hwcb_msix_init(struct bfa_s *bfa, int nvecs)
  98 {
  99         int i;
 100
 101         bfa_assert((nvecs == 1) || (nvecs == __HFN_NUMINTS));
 102
 103         bfa->msix.nvecs = nvecs;
 104         if (nvecs == 1) {
 105                 for (i = 0; i < BFA_MSIX_CB_MAX; i++)
 106                         bfa->msix.handler[i] = bfa_msix_all;
 107                 return;
 108         }
 109
 110         for (i = BFA_MSIX_CPE_Q0; i <= BFA_MSIX_CPE_Q7; i++)
 111                 bfa->msix.handler[i] = bfa_msix_reqq;
 112
 113         for (i = BFA_MSIX_RME_Q0; i <= BFA_MSIX_RME_Q7; i++)
 114                 bfa->msix.handler[i] = bfa_msix_rspq;
 115
 116         for (; i < BFA_MSIX_CB_MAX; i++)
 117                 bfa->msix.handler[i] = bfa_msix_lpu_err;
 118 }
 119
 120 /**
 121  * Crossbow -- dummy, interrupts are masked
 122  */
 123 void
 124 bfa_hwcb_msix_install(struct bfa_s *bfa)
 125 {
 126 }
 127
 128 void
 129 bfa_hwcb_msix_uninstall(struct bfa_s *bfa)
 130 {
 131 }
 132
 133 /**
 134  * No special enable/disable -- vector assignments are implicit.
 135  */
 136 void
 137 bfa_hwcb_isr_mode_set(struct bfa_s *bfa, bfa_boolean_t msix)
 138 {
 139         bfa->iocfc.hwif.hw_rspq_ack = bfa_hwcb_rspq_ack_msix;
 140 }
 141
 142