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
15void
16bfa_hwcb_reginit(struct bfa_s *bfa)
17{
18 struct bfa_iocfc_regs_s *bfa_regs = &bfa->iocfc.bfa_regs;
19 void __iomem *kva = bfa_ioc_bar0(&bfa->ioc);
20 int fn = bfa_ioc_pcifn(&bfa->ioc);
21
22 if (fn == 0) {
23 bfa_regs->intr_status = (kva + HOSTFN0_INT_STATUS);
24 bfa_regs->intr_mask = (kva + HOSTFN0_INT_MSK);
25 } else {
26 bfa_regs->intr_status = (kva + HOSTFN1_INT_STATUS);
27 bfa_regs->intr_mask = (kva + HOSTFN1_INT_MSK);
28 }
29}
30
31static void
32bfa_hwcb_reqq_ack_msix(struct bfa_s *bfa, int reqq)
33{
34 writel(__HFN_INT_CPE_Q0 << CPE_Q_NUM(bfa_ioc_pcifn(&bfa->ioc), reqq),
35 addr: bfa->iocfc.bfa_regs.intr_status);
36}
37
38/*
39 * Actions to respond RME Interrupt for Crossbow ASIC:
40 * - Write 1 to Interrupt Status register
41 * INTX - done in bfa_intx()
42 * MSIX - done in bfa_hwcb_rspq_ack_msix()
43 * - Update CI (only if new CI)
44 */
45static void
46bfa_hwcb_rspq_ack_msix(struct bfa_s *bfa, int rspq, u32 ci)
47{
48 writel(__HFN_INT_RME_Q0 << RME_Q_NUM(bfa_ioc_pcifn(&bfa->ioc), rspq),
49 addr: bfa->iocfc.bfa_regs.intr_status);
50
51 if (bfa_rspq_ci(bfa, rspq) == ci)
52 return;
53
54 bfa_rspq_ci(bfa, rspq) = ci;
55 writel(val: ci, addr: bfa->iocfc.bfa_regs.rme_q_ci[rspq]);
56}
57
58void
59bfa_hwcb_rspq_ack(struct bfa_s *bfa, int rspq, u32 ci)
60{
61 if (bfa_rspq_ci(bfa, rspq) == ci)
62 return;
63
64 bfa_rspq_ci(bfa, rspq) = ci;
65 writel(val: ci, addr: bfa->iocfc.bfa_regs.rme_q_ci[rspq]);
66}
67
68void
69bfa_hwcb_msix_getvecs(struct bfa_s *bfa, u32 *msix_vecs_bmap,
70 u32 *num_vecs, u32 *max_vec_bit)
71{
72#define __HFN_NUMINTS 13
73 if (bfa_ioc_pcifn(&bfa->ioc) == 0) {
74 *msix_vecs_bmap = (__HFN_INT_CPE_Q0 | __HFN_INT_CPE_Q1 |
75 __HFN_INT_CPE_Q2 | __HFN_INT_CPE_Q3 |
76 __HFN_INT_RME_Q0 | __HFN_INT_RME_Q1 |
77 __HFN_INT_RME_Q2 | __HFN_INT_RME_Q3 |
78 __HFN_INT_MBOX_LPU0);
79 *max_vec_bit = __HFN_INT_MBOX_LPU0;
80 } else {
81 *msix_vecs_bmap = (__HFN_INT_CPE_Q4 | __HFN_INT_CPE_Q5 |
82 __HFN_INT_CPE_Q6 | __HFN_INT_CPE_Q7 |
83 __HFN_INT_RME_Q4 | __HFN_INT_RME_Q5 |
84 __HFN_INT_RME_Q6 | __HFN_INT_RME_Q7 |
85 __HFN_INT_MBOX_LPU1);
86 *max_vec_bit = __HFN_INT_MBOX_LPU1;
87 }
88
89 *msix_vecs_bmap |= (__HFN_INT_ERR_EMC | __HFN_INT_ERR_LPU0 |
90 __HFN_INT_ERR_LPU1 | __HFN_INT_ERR_PSS);
91 *num_vecs = __HFN_NUMINTS;
92}
93
94/*
95 * Dummy interrupt handler for handling spurious interrupts.
96 */
97static void
98bfa_hwcb_msix_dummy(struct bfa_s *bfa, int vec)
99{
100}
101
102/*
103 * No special setup required for crossbow -- vector assignments are implicit.
104 */
105void
106bfa_hwcb_msix_init(struct bfa_s *bfa, int nvecs)
107{
108 WARN_ON((nvecs != 1) && (nvecs != __HFN_NUMINTS));
109
110 bfa->msix.nvecs = nvecs;
111 bfa_hwcb_msix_uninstall(bfa);
112}
113
114void
115bfa_hwcb_msix_ctrl_install(struct bfa_s *bfa)
116{
117 int i;
118
119 if (bfa->msix.nvecs == 0)
120 return;
121
122 if (bfa->msix.nvecs == 1) {
123 for (i = BFI_MSIX_CPE_QMIN_CB; i < BFI_MSIX_CB_MAX; i++)
124 bfa->msix.handler[i] = bfa_msix_all;
125 return;
126 }
127
128 for (i = BFI_MSIX_RME_QMAX_CB+1; i < BFI_MSIX_CB_MAX; i++)
129 bfa->msix.handler[i] = bfa_msix_lpu_err;
130}
131
132void
133bfa_hwcb_msix_queue_install(struct bfa_s *bfa)
134{
135 int i;
136
137 if (bfa->msix.nvecs == 0)
138 return;
139
140 if (bfa->msix.nvecs == 1) {
141 for (i = BFI_MSIX_CPE_QMIN_CB; i <= BFI_MSIX_RME_QMAX_CB; i++)
142 bfa->msix.handler[i] = bfa_msix_all;
143 return;
144 }
145
146 for (i = BFI_MSIX_CPE_QMIN_CB; i <= BFI_MSIX_CPE_QMAX_CB; i++)
147 bfa->msix.handler[i] = bfa_msix_reqq;
148
149 for (i = BFI_MSIX_RME_QMIN_CB; i <= BFI_MSIX_RME_QMAX_CB; i++)
150 bfa->msix.handler[i] = bfa_msix_rspq;
151}
152
153void
154bfa_hwcb_msix_uninstall(struct bfa_s *bfa)
155{
156 int i;
157
158 for (i = 0; i < BFI_MSIX_CB_MAX; i++)
159 bfa->msix.handler[i] = bfa_hwcb_msix_dummy;
160}
161
162/*
163 * No special enable/disable -- vector assignments are implicit.
164 */
165void
166bfa_hwcb_isr_mode_set(struct bfa_s *bfa, bfa_boolean_t msix)
167{
168 if (msix) {
169 bfa->iocfc.hwif.hw_reqq_ack = bfa_hwcb_reqq_ack_msix;
170 bfa->iocfc.hwif.hw_rspq_ack = bfa_hwcb_rspq_ack_msix;
171 } else {
172 bfa->iocfc.hwif.hw_reqq_ack = NULL;
173 bfa->iocfc.hwif.hw_rspq_ack = bfa_hwcb_rspq_ack;
174 }
175}
176
177void
178bfa_hwcb_msix_get_rme_range(struct bfa_s *bfa, u32 *start, u32 *end)
179{
180 *start = BFI_MSIX_RME_QMIN_CB;
181 *end = BFI_MSIX_RME_QMAX_CB;
182}
183

source code of linux/drivers/scsi/bfa/bfa_hw_cb.c