/*
* Copyright (c) 2005-2009 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 <bfa.h>
#include <bfi/bfi_ctreg.h>
#include <bfa_port_priv.h>
#include <bfa_intr_priv.h>
#include <cs/bfa_debug.h>
BFA_TRC_FILE(HAL, INTR);
static void
bfa_msix_errint(struct bfa_s *bfa, u32 intr)
{
bfa_ioc_error_isr(&bfa->ioc);
}
static void
bfa_msix_lpu(struct bfa_s *bfa)
{
bfa_ioc_mbox_isr(&bfa->ioc);
}
static void
bfa_reqq_resume(struct bfa_s *bfa, int qid)
{
struct list_head *waitq, *qe, *qen;
struct bfa_reqq_wait_s *wqe;
waitq = bfa_reqq(bfa, qid);
list_for_each_safe(qe, qen, waitq) {
/**
* Callback only as long as there is room in request queue
*/
if (bfa_reqq_full(bfa, qid))
break;
list_del(qe);
wqe = (struct bfa_reqq_wait_s *) qe;
wqe->qresume(wqe->cbarg);
}
}
void
bfa_msix_all(struct bfa_s *bfa, int vec)
{
bfa_intx(bfa);
}
/**
* hal_intr_api
*/
bfa_boolean_t
bfa_intx(struct bfa_s *bfa)
{
u32 intr, qintr;
int queue;
intr = bfa_reg_read(bfa->iocfc.bfa_regs.intr_status);
if (!intr)
return BFA_FALSE;
/**
* RME completion queue interrupt
*/
qintr = intr & __HFN_INT_RME_MASK;
bfa_reg_write(bfa->iocfc.bfa_regs.intr_status, qintr);
for (queue = 0; queue < BFI_IOC_MAX_CQS_ASIC; queue++) {
if (intr & (__HFN_INT_RME_Q0 << queue))
bfa_msix_rspq(bfa, queue & (BFI_IOC_MAX_CQS - 1));
}
intr &= ~qintr;
if (!intr)
return BFA_TRUE;
/**
* CPE completion queue interrupt
*/
qintr = intr & __HFN_INT_CPE_MASK;
bfa_reg_write(bfa->iocfc.bfa_regs.intr_status, qintr);
for (queue = 0; queue < BFI_IOC_MAX_CQS_ASIC; queue++) {
if (intr & (__HFN_INT_CPE_Q0 << queue))
bfa_msix_reqq(bfa, queue & (BFI_IOC_MAX_CQS - 1));
}
intr &= ~qintr;
if (!intr)
return BFA_TRUE;
bfa_msix_lpu_err(bfa, intr);
return BFA_TRUE;
}
void
bfa_isr_enable(struct bfa_s *bfa)
{
u32 intr_unmask;
int pci_func = bfa_ioc_pcifn(&bfa->ioc);
bfa_trc(bfa, pci_func);
bfa_msix_install(bfa);
intr_unmask = (__HFN_INT_ERR_EMC | __HFN_INT_ERR_LPU0 |
__HFN_INT_ERR_LPU1 | __HFN_INT_ERR_PSS |
__HFN_INT_LL_HALT);
if (pci_func == 0)
intr_unmask |= (__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);
else
intr_unmask |= (__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);
bfa_reg_write(bfa->iocfc.bfa_regs.intr_status, intr_unmask);
bfa_reg_write(bfa->iocfc.bfa_regs.intr_mask, ~intr_unmask);
bfa_isr_mode_set(bfa, bfa->msix.nvecs != 0);
}
void
bfa_isr_disable(struct bfa_s *bfa)
{
bfa_isr_mode_set(bfa, BFA_FALSE);
bfa_reg_write(bfa->iocfc.bfa_regs.intr_mask, -1L);
bfa_msix_uninstall(bfa);
}
void
bfa_msix_reqq(struct bfa_s *bfa, int qid)
{
struct list_head *waitq;
qid &= (BFI_IOC_MAX_CQS - 1);
bfa->iocfc.hwif.hw_reqq_ack(bfa, qid);
/**
* Resume any pending requests in the corresponding reqq.
*/
waitq = bfa_reqq(bfa, qid);
if (!list_empty(waitq))
bfa_reqq_resume(bfa, qid);
}
void
bfa_isr_unhandled(struct bfa_s *bfa, struct bfi_msg_s *m)
{
bfa_trc(bfa, m->mhdr.msg_class);
bfa_trc(bfa, m->mhdr.msg_id);
bfa_trc(bfa, m->mhdr.mtag.i2htok);
bfa_assert(0);
bfa_trc_stop(bfa->trcmod);
}
void
bfa_msix_rspq(struct bfa_s *bfa, int qid)
{
struct bfi_msg_s *m;
u32 pi, ci;
struct list_head *waitq;
bfa_trc_fp(bfa, qid);
qid &= (BFI_IOC_MAX_CQS - 1);
bfa->iocfc.hwif.hw_rspq_ack(bfa, qid);
ci = bfa_rspq_ci(bfa, qid);
pi = bfa_rspq_pi(bfa, qid);
bfa_trc_fp(bfa, ci);
bfa_trc_fp(bfa, pi);
if (bfa->rme_process) {
while (ci != pi) {
m = bfa_rspq_elem(bfa, qid, ci);
bfa_assert_fp(m->mhdr.msg_class < BFI_MC_MAX);
bfa_isrs[m->mhdr.msg_class] (bfa, m);
CQ_INCR(ci, bfa->iocfc.cfg.drvcfg.num_rspq_elems);
}
}
/**
* update CI
*/
bfa_rspq_ci(bfa, qid) = pi;
bfa_reg_write(bfa->iocfc.bfa_regs.rme_q_ci[qid], pi);
bfa_os_mmiowb();
/**
* Resume any pending requests in the corresponding reqq.
*/
waitq = bfa_reqq(bfa, qid);
if (!list_empty(waitq))
bfa_reqq_resume(bfa, qid);
}
void
bfa_msix_lpu_err(struct bfa_s *bfa, int vec)
{
u32 intr, curr_value;
intr = bfa_reg_read(bfa->iocfc.bfa_regs.intr_status);
if (intr & (__HFN_INT_MBOX_LPU0 | __HFN_INT_MBOX_LPU1))
bfa_msix_lpu(bfa);
intr &= (__HFN_INT_ERR_EMC | __HFN_INT_ERR_LPU0 |
__HFN_INT_ERR_LPU1 | __HFN_INT_ERR_PSS | __HFN_INT_LL_HALT);
if (intr) {
if (intr & __HFN_INT_LL_HALT) {
/**
* If LL_HALT bit is set then FW Init Halt LL Port
* Register needs to be cleared as well so Interrupt
* Status Register will be cleared.
*/
curr_value = bfa_reg_read(bfa->ioc.ioc_regs.ll_halt);
curr_value &= ~__FW_INIT_HALT_P;
bfa_reg_write(bfa->ioc.ioc_regs.ll_halt, curr_value);
}
if (intr & __HFN_INT_ERR_PSS) {
/**
* ERR_PSS bit needs to be cleared as well in case
* interrups are shared so driver's interrupt handler is
* still called eventhough it is already masked out.
*/
curr_value = bfa_reg_read(
bfa->ioc.ioc_regs.pss_err_status_reg);
curr_value &= __PSS_ERR_STATUS_SET;
bfa_reg_write(bfa->ioc.ioc_regs.pss_err_status_reg,
curr_value);
}
bfa_reg_write(bfa->iocfc.bfa_regs.intr_status, intr);
bfa_msix_errint(bfa, intr);
}
}
void
bfa_isr_bind(enum bfi_mclass mc, bfa_isr_func_t isr_func)
{
bfa_isrs[mc] = isr_func;
}
