summaryrefslogtreecommitdiffstats
path: root/drivers/scsi/bfa/bfa_hw_ct.c
blob: 21018d98a07bb002bffe063e4c8650b8f3cc6263 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
/*
 * Copyright (c) 2005-2010 Brocade Communications Systems, Inc.
 * All rights reserved
 * www.brocade.com
 *
 * Linux driver for Brocade Fibre Channel Host Bus Adapter.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License (GPL) Version 2 as
 * published by the Free Software Foundation
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 */

#include "bfad_drv.h"
#include "bfa_modules.h"
#include "bfi_ctreg.h"

BFA_TRC_FILE(HAL, IOCFC_CT);

static u32 __ct_msix_err_vec_reg[] = {
	HOST_MSIX_ERR_INDEX_FN0,
	HOST_MSIX_ERR_INDEX_FN1,
	HOST_MSIX_ERR_INDEX_FN2,
	HOST_MSIX_ERR_INDEX_FN3,
};

static void
bfa_hwct_msix_lpu_err_set(struct bfa_s *bfa, bfa_boolean_t msix, int vec)
{
	int fn = bfa_ioc_pcifn(&bfa->ioc);
	void __iomem *kva = bfa_ioc_bar0(&bfa->ioc);

	if (msix)
		writel(vec, kva + __ct_msix_err_vec_reg[fn]);
	else
		writel(0, kva + __ct_msix_err_vec_reg[fn]);
}

/*
 * Dummy interrupt handler for handling spurious interrupt during chip-reinit.
 */
static void
bfa_hwct_msix_dummy(struct bfa_s *bfa, int vec)
{
}

void
bfa_hwct_reginit(struct bfa_s *bfa)
{
	struct bfa_iocfc_regs_s	*bfa_regs = &bfa->iocfc.bfa_regs;
	void __iomem *kva = bfa_ioc_bar0(&bfa->ioc);
	int			i, q, fn = bfa_ioc_pcifn(&bfa->ioc);

	if (fn == 0) {
		bfa_regs->intr_status = (kva + HOSTFN0_INT_STATUS);
		bfa_regs->intr_mask   = (kva + HOSTFN0_INT_MSK);
	} else {
		bfa_regs->intr_status = (kva + HOSTFN1_INT_STATUS);
		bfa_regs->intr_mask   = (kva + HOSTFN1_INT_MSK);
	}

	for (i = 0; i < BFI_IOC_MAX_CQS; i++) {
		/*
		 * CPE registers
		 */
		q = CPE_Q_NUM(fn, i);
		bfa_regs->cpe_q_pi[i] = (kva + CPE_PI_PTR_Q(q << 5));
		bfa_regs->cpe_q_ci[i] = (kva + CPE_CI_PTR_Q(q << 5));
		bfa_regs->cpe_q_depth[i] = (kva + CPE_DEPTH_Q(q << 5));
		bfa_regs->cpe_q_ctrl[i] = (kva + CPE_QCTRL_Q(q << 5));

		/*
		 * RME registers
		 */
		q = CPE_Q_NUM(fn, i);
		bfa_regs->rme_q_pi[i] = (kva + RME_PI_PTR_Q(q << 5));
		bfa_regs->rme_q_ci[i] = (kva + RME_CI_PTR_Q(q << 5));
		bfa_regs->rme_q_depth[i] = (kva + RME_DEPTH_Q(q << 5));
		bfa_regs->rme_q_ctrl[i] = (kva + RME_QCTRL_Q(q << 5));
	}
}

void
bfa_hwct_reqq_ack(struct bfa_s *bfa, int reqq)
{
	u32	r32;

	r32 = readl(bfa->iocfc.bfa_regs.cpe_q_ctrl[reqq]);
	writel(r32, bfa->iocfc.bfa_regs.cpe_q_ctrl[reqq]);
}

void
bfa_hwct_rspq_ack(struct bfa_s *bfa, int rspq)
{
	u32	r32;

	r32 = readl(bfa->iocfc.bfa_regs.rme_q_ctrl[rspq]);
	writel(r32, bfa->iocfc.bfa_regs.rme_q_ctrl[rspq]);
}

void
bfa_hwct_msix_getvecs(struct bfa_s *bfa, u32 *msix_vecs_bmap,
		 u32 *num_vecs, u32 *max_vec_bit)
{
	*msix_vecs_bmap = (1 << BFA_MSIX_CT_MAX) - 1;
	*max_vec_bit = (1 << (BFA_MSIX_CT_MAX - 1));
	*num_vecs = BFA_MSIX_CT_MAX;
}

/*
 * Setup MSI-X vector for catapult
 */
void
bfa_hwct_msix_init(struct bfa_s *bfa, int nvecs)
{
	WARN_ON((nvecs != 1) && (nvecs != BFA_MSIX_CT_MAX));
	bfa_trc(bfa, nvecs);

	bfa->msix.nvecs = nvecs;
	bfa_hwct_msix_uninstall(bfa);
}

void
bfa_hwct_msix_install(struct bfa_s *bfa)
{
	int i;

	if (bfa->msix.nvecs == 0)
		return;

	if (bfa->msix.nvecs == 1) {
		for (i = 0; i < BFA_MSIX_CT_MAX; i++)
			bfa->msix.handler[i] = bfa_msix_all;
		return;
	}

	for (i = BFA_MSIX_CPE_Q0; i <= BFA_MSIX_CPE_Q3; i++)
		bfa->msix.handler[i] = bfa_msix_reqq;

	for (; i <= BFA_MSIX_RME_Q3; i++)
		bfa->msix.handler[i] = bfa_msix_rspq;

	WARN_ON(i != BFA_MSIX_LPU_ERR);
	bfa->msix.handler[BFA_MSIX_LPU_ERR] = bfa_msix_lpu_err;
}

void
bfa_hwct_msix_uninstall(struct bfa_s *bfa)
{
	int i;

	for (i = 0; i < BFA_MSIX_CT_MAX; i++)
		bfa->msix.handler[i] = bfa_hwct_msix_dummy;
}

/*
 * Enable MSI-X vectors
 */
void
bfa_hwct_isr_mode_set(struct bfa_s *bfa, bfa_boolean_t msix)
{
	bfa_trc(bfa, 0);
	bfa_hwct_msix_lpu_err_set(bfa, msix, BFA_MSIX_LPU_ERR);
	bfa_ioc_isr_mode_set(&bfa->ioc, msix);
}

void
bfa_hwct_msix_get_rme_range(struct bfa_s *bfa, u32 *start, u32 *end)
{
	*start = BFA_MSIX_RME_Q0;
	*end = BFA_MSIX_RME_Q3;
}