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/*
* 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_reg.h"
void
bfa_hwcb_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 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);
}
}
static void
bfa_hwcb_reqq_ack_msix(struct bfa_s *bfa, int reqq)
{
writel(__HFN_INT_CPE_Q0 << CPE_Q_NUM(bfa_ioc_pcifn(&bfa->ioc), reqq),
bfa->iocfc.bfa_regs.intr_status);
}
/*
* Actions to respond RME Interrupt for Crossbow ASIC:
* - Write 1 to Interrupt Status register
* INTX - done in bfa_intx()
* MSIX - done in bfa_hwcb_rspq_ack_msix()
* - Update CI (only if new CI)
*/
static void
bfa_hwcb_rspq_ack_msix(struct bfa_s *bfa, int rspq, u32 ci)
{
writel(__HFN_INT_RME_Q0 << RME_Q_NUM(bfa_ioc_pcifn(&bfa->ioc), rspq),
bfa->iocfc.bfa_regs.intr_status);
if (bfa_rspq_ci(bfa, rspq) == ci)
return;
bfa_rspq_ci(bfa, rspq) = ci;
writel(ci, bfa->iocfc.bfa_regs.rme_q_ci[rspq]);
mmiowb();
}
void
bfa_hwcb_rspq_ack(struct bfa_s *bfa, int rspq, u32 ci)
{
if (bfa_rspq_ci(bfa, rspq) == ci)
return;
bfa_rspq_ci(bfa, rspq) = ci;
writel(ci, bfa->iocfc.bfa_regs.rme_q_ci[rspq]);
mmiowb();
}
void
bfa_hwcb_msix_getvecs(struct bfa_s *bfa, u32 *msix_vecs_bmap,
u32 *num_vecs, u32 *max_vec_bit)
{
#define __HFN_NUMINTS 13
if (bfa_ioc_pcifn(&bfa->ioc) == 0) {
*msix_vecs_bmap = (__HFN_INT_CPE_Q0 | __HFN_INT_CPE_Q1 |
__HFN_INT_CPE_Q2 | __HFN_INT_CPE_Q3 |
__HFN_INT_RME_Q0 | __HFN_INT_RME_Q1 |
__HFN_INT_RME_Q2 | __HFN_INT_RME_Q3 |
__HFN_INT_MBOX_LPU0);
*max_vec_bit = __HFN_INT_MBOX_LPU0;
} else {
*msix_vecs_bmap = (__HFN_INT_CPE_Q4 | __HFN_INT_CPE_Q5 |
__HFN_INT_CPE_Q6 | __HFN_INT_CPE_Q7 |
__HFN_INT_RME_Q4 | __HFN_INT_RME_Q5 |
__HFN_INT_RME_Q6 | __HFN_INT_RME_Q7 |
__HFN_INT_MBOX_LPU1);
*max_vec_bit = __HFN_INT_MBOX_LPU1;
}
*msix_vecs_bmap |= (__HFN_INT_ERR_EMC | __HFN_INT_ERR_LPU0 |
__HFN_INT_ERR_LPU1 | __HFN_INT_ERR_PSS);
*num_vecs = __HFN_NUMINTS;
}
/*
* Dummy interrupt handler for handling spurious interrupts.
*/
static void
bfa_hwcb_msix_dummy(struct bfa_s *bfa, int vec)
{
}
/*
* No special setup required for crossbow -- vector assignments are implicit.
*/
void
bfa_hwcb_msix_init(struct bfa_s *bfa, int nvecs)
{
WARN_ON((nvecs != 1) && (nvecs != __HFN_NUMINTS));
bfa->msix.nvecs = nvecs;
bfa_hwcb_msix_uninstall(bfa);
}
void
bfa_hwcb_msix_ctrl_install(struct bfa_s *bfa)
{
int i;
if (bfa->msix.nvecs == 0)
return;
if (bfa->msix.nvecs == 1) {
for (i = BFI_MSIX_CPE_QMIN_CB; i < BFI_MSIX_CB_MAX; i++)
bfa->msix.handler[i] = bfa_msix_all;
return;
}
for (i = BFI_MSIX_RME_QMAX_CB+1; i < BFI_MSIX_CB_MAX; i++)
bfa->msix.handler[i] = bfa_msix_lpu_err;
}
void
bfa_hwcb_msix_queue_install(struct bfa_s *bfa)
{
int i;
if (bfa->msix.nvecs == 0)
return;
if (bfa->msix.nvecs == 1) {
for (i = BFI_MSIX_CPE_QMIN_CB; i <= BFI_MSIX_RME_QMAX_CB; i++)
bfa->msix.handler[i] = bfa_msix_all;
return;
}
for (i = BFI_MSIX_CPE_QMIN_CB; i <= BFI_MSIX_CPE_QMAX_CB; i++)
bfa->msix.handler[i] = bfa_msix_reqq;
for (i = BFI_MSIX_RME_QMIN_CB; i <= BFI_MSIX_RME_QMAX_CB; i++)
bfa->msix.handler[i] = bfa_msix_rspq;
}
void
bfa_hwcb_msix_uninstall(struct bfa_s *bfa)
{
int i;
for (i = 0; i < BFI_MSIX_CB_MAX; i++)
bfa->msix.handler[i] = bfa_hwcb_msix_dummy;
}
/*
* No special enable/disable -- vector assignments are implicit.
*/
void
bfa_hwcb_isr_mode_set(struct bfa_s *bfa, bfa_boolean_t msix)
{
if (msix) {
bfa->iocfc.hwif.hw_reqq_ack = bfa_hwcb_reqq_ack_msix;
bfa->iocfc.hwif.hw_rspq_ack = bfa_hwcb_rspq_ack_msix;
} else {
bfa->iocfc.hwif.hw_reqq_ack = NULL;
bfa->iocfc.hwif.hw_rspq_ack = bfa_hwcb_rspq_ack;
}
}
void
bfa_hwcb_msix_get_rme_range(struct bfa_s *bfa, u32 *start, u32 *end)
{
*start = BFI_MSIX_RME_QMIN_CB;
*end = BFI_MSIX_RME_QMAX_CB;
}
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