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 } 177