drivers/scsi/bfa/bfa_hw_ct.c

   1 /*
   2  * Copyright (c) 2005-2010 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 "bfad_drv.h"
  19 #include "bfa_modules.h"
  20 #include "bfi_ctreg.h"
  21
  22 BFA_TRC_FILE(HAL, IOCFC_CT);
  23
  24 static u32 __ct_msix_err_vec_reg[] = {
  25         HOST_MSIX_ERR_INDEX_FN0,
  26         HOST_MSIX_ERR_INDEX_FN1,
  27         HOST_MSIX_ERR_INDEX_FN2,
  28         HOST_MSIX_ERR_INDEX_FN3,
  29 };
  30
  31 static void
  32 bfa_hwct_msix_lpu_err_set(struct bfa_s *bfa, bfa_boolean_t msix, int vec)
  33 {
  34         int fn = bfa_ioc_pcifn(&bfa->ioc);
  35         void __iomem *kva = bfa_ioc_bar0(&bfa->ioc);
  36
  37         if (msix)
  38                 writel(vec, kva + __ct_msix_err_vec_reg[fn]);
  39         else
  40                 writel(0, kva + __ct_msix_err_vec_reg[fn]);
  41 }
  42
  43 /*
  44  * Dummy interrupt handler for handling spurious interrupt during chip-reinit.
  45  */
  46 static void
  47 bfa_hwct_msix_dummy(struct bfa_s *bfa, int vec)
  48 {
  49 }
  50
  51 void
  52 bfa_hwct_reginit(struct bfa_s *bfa)
  53 {
  54         struct bfa_iocfc_regs_s *bfa_regs = &bfa->iocfc.bfa_regs;
  55         void __iomem *kva = bfa_ioc_bar0(&bfa->ioc);
  56         int                     i, q, fn = bfa_ioc_pcifn(&bfa->ioc);
  57
  58         if (fn == 0) {
  59                 bfa_regs->intr_status = (kva + HOSTFN0_INT_STATUS);
  60                 bfa_regs->intr_mask   = (kva + HOSTFN0_INT_MSK);
  61         } else {
  62                 bfa_regs->intr_status = (kva + HOSTFN1_INT_STATUS);
  63                 bfa_regs->intr_mask   = (kva + HOSTFN1_INT_MSK);
  64         }
  65
  66         for (i = 0; i < BFI_IOC_MAX_CQS; i++) {
  67                 /*
  68                  * CPE registers
  69                  */
  70                 q = CPE_Q_NUM(fn, i);
  71                 bfa_regs->cpe_q_pi[i] = (kva + CPE_PI_PTR_Q(q << 5));
  72                 bfa_regs->cpe_q_ci[i] = (kva + CPE_CI_PTR_Q(q << 5));
  73                 bfa_regs->cpe_q_depth[i] = (kva + CPE_DEPTH_Q(q << 5));
  74                 bfa_regs->cpe_q_ctrl[i] = (kva + CPE_QCTRL_Q(q << 5));
  75
  76                 /*
  77                  * RME registers
  78                  */
  79                 q = CPE_Q_NUM(fn, i);
  80                 bfa_regs->rme_q_pi[i] = (kva + RME_PI_PTR_Q(q << 5));
  81                 bfa_regs->rme_q_ci[i] = (kva + RME_CI_PTR_Q(q << 5));
  82                 bfa_regs->rme_q_depth[i] = (kva + RME_DEPTH_Q(q << 5));
  83                 bfa_regs->rme_q_ctrl[i] = (kva + RME_QCTRL_Q(q << 5));
  84         }
  85 }
  86
  87 void
  88 bfa_hwct_reqq_ack(struct bfa_s *bfa, int reqq)
  89 {
  90         u32     r32;
  91
  92         r32 = readl(bfa->iocfc.bfa_regs.cpe_q_ctrl[reqq]);
  93         writel(r32, bfa->iocfc.bfa_regs.cpe_q_ctrl[reqq]);
  94 }
  95
  96 void
  97 bfa_hwct_rspq_ack(struct bfa_s *bfa, int rspq)
  98 {
  99         u32     r32;
 100
 101         r32 = readl(bfa->iocfc.bfa_regs.rme_q_ctrl[rspq]);
 102         writel(r32, bfa->iocfc.bfa_regs.rme_q_ctrl[rspq]);
 103 }
 104
 105 void
 106 bfa_hwct_msix_getvecs(struct bfa_s *bfa, u32 *msix_vecs_bmap,
 107                  u32 *num_vecs, u32 *max_vec_bit)
 108 {
 109         *msix_vecs_bmap = (1 << BFA_MSIX_CT_MAX) - 1;
 110         *max_vec_bit = (1 << (BFA_MSIX_CT_MAX - 1));
 111         *num_vecs = BFA_MSIX_CT_MAX;
 112 }
 113
 114 /*
 115  * Setup MSI-X vector for catapult
 116  */
 117 void
 118 bfa_hwct_msix_init(struct bfa_s *bfa, int nvecs)
 119 {
 120         WARN_ON((nvecs != 1) && (nvecs != BFA_MSIX_CT_MAX));
 121         bfa_trc(bfa, nvecs);
 122
 123         bfa->msix.nvecs = nvecs;
 124         bfa_hwct_msix_uninstall(bfa);
 125 }
 126
 127 void
 128 bfa_hwct_msix_install(struct bfa_s *bfa)
 129 {
 130         int i;
 131
 132         if (bfa->msix.nvecs == 0)
 133                 return;
 134
 135         if (bfa->msix.nvecs == 1) {
 136                 for (i = 0; i < BFA_MSIX_CT_MAX; i++)
 137                         bfa->msix.handler[i] = bfa_msix_all;
 138                 return;
 139         }
 140
 141         for (i = BFA_MSIX_CPE_Q0; i <= BFA_MSIX_CPE_Q3; i++)
 142                 bfa->msix.handler[i] = bfa_msix_reqq;
 143
 144         for (; i <= BFA_MSIX_RME_Q3; i++)
 145                 bfa->msix.handler[i] = bfa_msix_rspq;
 146
 147         WARN_ON(i != BFA_MSIX_LPU_ERR);
 148         bfa->msix.handler[BFA_MSIX_LPU_ERR] = bfa_msix_lpu_err;
 149 }
 150
 151 void
 152 bfa_hwct_msix_uninstall(struct bfa_s *bfa)
 153 {
 154         int i;
 155
 156         for (i = 0; i < BFA_MSIX_CT_MAX; i++)
 157                 bfa->msix.handler[i] = bfa_hwct_msix_dummy;
 158 }
 159
 160 /*
 161  * Enable MSI-X vectors
 162  */
 163 void
 164 bfa_hwct_isr_mode_set(struct bfa_s *bfa, bfa_boolean_t msix)
 165 {
 166         bfa_trc(bfa, 0);
 167         bfa_hwct_msix_lpu_err_set(bfa, msix, BFA_MSIX_LPU_ERR);
 168         bfa_ioc_isr_mode_set(&bfa->ioc, msix);
 169 }
 170
 171 void
 172 bfa_hwct_msix_get_rme_range(struct bfa_s *bfa, u32 *start, u32 *end)
 173 {
 174         *start = BFA_MSIX_RME_Q0;
 175         *end = BFA_MSIX_RME_Q3;
 176 }