drivers/scsi/bfa/bfa_hw_ct.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (c) 2005-2014 Brocade Communications Systems, Inc.
   4  * Copyright (c) 2014- QLogic Corporation.
   5  * All rights reserved
   6  * www.qlogic.com
   7  *
   8  * Linux driver for QLogic BR-series Fibre Channel Host Bus Adapter.
   9  */
  10
  11 #include "bfad_drv.h"
  12 #include "bfa_modules.h"
  13 #include "bfi_reg.h"
  14
  15 BFA_TRC_FILE(HAL, IOCFC_CT);
  16
  17 /*
  18  * Dummy interrupt handler for handling spurious interrupt during chip-reinit.
  19  */
  20 static void
  21 bfa_hwct_msix_dummy(struct bfa_s *bfa, int vec)
  22 {
  23 }
  24
  25 void
  26 bfa_hwct_reginit(struct bfa_s *bfa)
  27 {
  28         struct bfa_iocfc_regs_s *bfa_regs = &bfa->iocfc.bfa_regs;
  29         void __iomem *kva = bfa_ioc_bar0(&bfa->ioc);
  30         int     fn = bfa_ioc_pcifn(&bfa->ioc);
  31
  32         if (fn == 0) {
  33                 bfa_regs->intr_status = (kva + HOSTFN0_INT_STATUS);
  34                 bfa_regs->intr_mask   = (kva + HOSTFN0_INT_MSK);
  35         } else {
  36                 bfa_regs->intr_status = (kva + HOSTFN1_INT_STATUS);
  37                 bfa_regs->intr_mask   = (kva + HOSTFN1_INT_MSK);
  38         }
  39 }
  40
  41 void
  42 bfa_hwct2_reginit(struct bfa_s *bfa)
  43 {
  44         struct bfa_iocfc_regs_s *bfa_regs = &bfa->iocfc.bfa_regs;
  45         void __iomem    *kva = bfa_ioc_bar0(&bfa->ioc);
  46
  47         bfa_regs->intr_status = (kva + CT2_HOSTFN_INT_STATUS);
  48         bfa_regs->intr_mask   = (kva + CT2_HOSTFN_INTR_MASK);
  49 }
  50
  51 void
  52 bfa_hwct_reqq_ack(struct bfa_s *bfa, int reqq)
  53 {
  54         u32     r32;
  55
  56         r32 = readl(bfa->iocfc.bfa_regs.cpe_q_ctrl[reqq]);
  57         writel(r32, bfa->iocfc.bfa_regs.cpe_q_ctrl[reqq]);
  58 }
  59
  60 /*
  61  * Actions to respond RME Interrupt for Catapult ASIC:
  62  * - Write 1 to Interrupt Status register (INTx only - done in bfa_intx())
  63  * - Acknowledge by writing to RME Queue Control register
  64  * - Update CI
  65  */
  66 void
  67 bfa_hwct_rspq_ack(struct bfa_s *bfa, int rspq, u32 ci)
  68 {
  69         u32     r32;
  70
  71         r32 = readl(bfa->iocfc.bfa_regs.rme_q_ctrl[rspq]);
  72         writel(r32, bfa->iocfc.bfa_regs.rme_q_ctrl[rspq]);
  73
  74         bfa_rspq_ci(bfa, rspq) = ci;
  75         writel(ci, bfa->iocfc.bfa_regs.rme_q_ci[rspq]);
  76 }
  77
  78 /*
  79  * Actions to respond RME Interrupt for Catapult2 ASIC:
  80  * - Write 1 to Interrupt Status register (INTx only - done in bfa_intx())
  81  * - Update CI
  82  */
  83 void
  84 bfa_hwct2_rspq_ack(struct bfa_s *bfa, int rspq, u32 ci)
  85 {
  86         bfa_rspq_ci(bfa, rspq) = ci;
  87         writel(ci, bfa->iocfc.bfa_regs.rme_q_ci[rspq]);
  88 }
  89
  90 void
  91 bfa_hwct_msix_getvecs(struct bfa_s *bfa, u32 *msix_vecs_bmap,
  92                  u32 *num_vecs, u32 *max_vec_bit)
  93 {
  94         *msix_vecs_bmap = (1 << BFI_MSIX_CT_MAX) - 1;
  95         *max_vec_bit = (1 << (BFI_MSIX_CT_MAX - 1));
  96         *num_vecs = BFI_MSIX_CT_MAX;
  97 }
  98
  99 /*
 100  * Setup MSI-X vector for catapult
 101  */
 102 void
 103 bfa_hwct_msix_init(struct bfa_s *bfa, int nvecs)
 104 {
 105         WARN_ON((nvecs != 1) && (nvecs != BFI_MSIX_CT_MAX));
 106         bfa_trc(bfa, nvecs);
 107
 108         bfa->msix.nvecs = nvecs;
 109         bfa_hwct_msix_uninstall(bfa);
 110 }
 111
 112 void
 113 bfa_hwct_msix_ctrl_install(struct bfa_s *bfa)
 114 {
 115         if (bfa->msix.nvecs == 0)
 116                 return;
 117
 118         if (bfa->msix.nvecs == 1)
 119                 bfa->msix.handler[BFI_MSIX_LPU_ERR_CT] = bfa_msix_all;
 120         else
 121                 bfa->msix.handler[BFI_MSIX_LPU_ERR_CT] = bfa_msix_lpu_err;
 122 }
 123
 124 void
 125 bfa_hwct_msix_queue_install(struct bfa_s *bfa)
 126 {
 127         int i;
 128
 129         if (bfa->msix.nvecs == 0)
 130                 return;
 131
 132         if (bfa->msix.nvecs == 1) {
 133                 for (i = BFI_MSIX_CPE_QMIN_CT; i < BFI_MSIX_CT_MAX; i++)
 134                         bfa->msix.handler[i] = bfa_msix_all;
 135                 return;
 136         }
 137
 138         for (i = BFI_MSIX_CPE_QMIN_CT; i <= BFI_MSIX_CPE_QMAX_CT; i++)
 139                 bfa->msix.handler[i] = bfa_msix_reqq;
 140
 141         for (i = BFI_MSIX_RME_QMIN_CT; i <= BFI_MSIX_RME_QMAX_CT; i++)
 142                 bfa->msix.handler[i] = bfa_msix_rspq;
 143 }
 144
 145 void
 146 bfa_hwct_msix_uninstall(struct bfa_s *bfa)
 147 {
 148         int i;
 149
 150         for (i = 0; i < BFI_MSIX_CT_MAX; i++)
 151                 bfa->msix.handler[i] = bfa_hwct_msix_dummy;
 152 }
 153
 154 /*
 155  * Enable MSI-X vectors
 156  */
 157 void
 158 bfa_hwct_isr_mode_set(struct bfa_s *bfa, bfa_boolean_t msix)
 159 {
 160         bfa_trc(bfa, 0);
 161         bfa_ioc_isr_mode_set(&bfa->ioc, msix);
 162 }
 163
 164 void
 165 bfa_hwct_msix_get_rme_range(struct bfa_s *bfa, u32 *start, u32 *end)
 166 {
 167         *start = BFI_MSIX_RME_QMIN_CT;
 168         *end = BFI_MSIX_RME_QMAX_CT;
 169 }