/*
* 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_ioc.h"
#include "bfi_reg.h"
#include "bfa_defs.h"
BFA_TRC_FILE(CNA, IOC_CT);
#define bfa_ioc_ct_sync_pos(__ioc) \
((uint32_t) (1 << bfa_ioc_pcifn(__ioc)))
#define BFA_IOC_SYNC_REQD_SH 16
#define bfa_ioc_ct_get_sync_ackd(__val) (__val & 0x0000ffff)
#define bfa_ioc_ct_clear_sync_ackd(__val) (__val & 0xffff0000)
#define bfa_ioc_ct_get_sync_reqd(__val) (__val >> BFA_IOC_SYNC_REQD_SH)
#define bfa_ioc_ct_sync_reqd_pos(__ioc) \
(bfa_ioc_ct_sync_pos(__ioc) << BFA_IOC_SYNC_REQD_SH)
/*
* forward declarations
*/
static bfa_boolean_t bfa_ioc_ct_firmware_lock(struct bfa_ioc_s *ioc);
static void bfa_ioc_ct_firmware_unlock(struct bfa_ioc_s *ioc);
static void bfa_ioc_ct_notify_fail(struct bfa_ioc_s *ioc);
static void bfa_ioc_ct_ownership_reset(struct bfa_ioc_s *ioc);
static bfa_boolean_t bfa_ioc_ct_sync_start(struct bfa_ioc_s *ioc);
static void bfa_ioc_ct_sync_join(struct bfa_ioc_s *ioc);
static void bfa_ioc_ct_sync_leave(struct bfa_ioc_s *ioc);
static void bfa_ioc_ct_sync_ack(struct bfa_ioc_s *ioc);
static bfa_boolean_t bfa_ioc_ct_sync_complete(struct bfa_ioc_s *ioc);
static void bfa_ioc_ct_set_cur_ioc_fwstate(
struct bfa_ioc_s *ioc, enum bfi_ioc_state fwstate);
static enum bfi_ioc_state bfa_ioc_ct_get_cur_ioc_fwstate(struct bfa_ioc_s *ioc);
static void bfa_ioc_ct_set_alt_ioc_fwstate(
struct bfa_ioc_s *ioc, enum bfi_ioc_state fwstate);
static enum bfi_ioc_state bfa_ioc_ct_get_alt_ioc_fwstate(struct bfa_ioc_s *ioc);
static struct bfa_ioc_hwif_s hwif_ct;
static struct bfa_ioc_hwif_s hwif_ct2;
/*
* Return true if firmware of current driver matches the running firmware.
*/
static bfa_boolean_t
bfa_ioc_ct_firmware_lock(struct bfa_ioc_s *ioc)
{
enum bfi_ioc_state ioc_fwstate;
u32 usecnt;
struct bfi_ioc_image_hdr_s fwhdr;
bfa_ioc_sem_get(ioc->ioc_regs.ioc_usage_sem_reg);
usecnt = readl(ioc->ioc_regs.ioc_usage_reg);
/*
* If usage count is 0, always return TRUE.
*/
if (usecnt == 0) {
writel(1, ioc->ioc_regs.ioc_usage_reg);
readl(ioc->ioc_regs.ioc_usage_sem_reg);
writel(1, ioc->ioc_regs.ioc_usage_sem_reg);
writel(0, ioc->ioc_regs.ioc_fail_sync);
bfa_trc(ioc, usecnt);
return BFA_TRUE;
}
ioc_fwstate = readl(ioc->ioc_regs.ioc_fwstate);
bfa_trc(ioc, ioc_fwstate);
/*
* Use count cannot be non-zero and chip in uninitialized state.
*/
WARN_ON(ioc_fwstate == BFI_IOC_UNINIT);
/*
* Check if another driver with a different firmware is active
*/
bfa_ioc_fwver_get(ioc, &fwhdr);
if (!bfa_ioc_fwver_cmp(ioc, &fwhdr)) {
readl(ioc->ioc_regs.ioc_usage_sem_reg);
writel(1, ioc->ioc_regs.ioc_usage_sem_reg);
bfa_trc(ioc, usecnt);
return BFA_FALSE;
}
/*
* Same firmware version. Increment the reference count.
*/
usecnt++;
writel(usecnt, ioc->ioc_regs.ioc_usage_reg);
readl(ioc->ioc_regs.ioc_usage_sem_reg);
writel(1, ioc->ioc_regs.ioc_usage_sem_reg);
bfa_trc(ioc, usecnt);
return BFA_TRUE;
}
static void
bfa_ioc_ct_firmware_unlock(struct bfa_ioc_s *ioc)
{
u32 usecnt;
/*
* decrement usage count
*/
bfa_ioc_sem_get(ioc->ioc_regs.ioc_usage_sem_reg);
usecnt = readl(ioc->ioc_regs.ioc_usage_reg);
WARN_ON(usecnt <= 0);
usecnt--;
writel(usecnt, ioc->ioc_regs.ioc_usage_reg);
bfa_trc(ioc, usecnt);
readl(ioc->ioc_regs.ioc_usage_sem_reg);
writel(1, ioc->ioc_regs.ioc_usage_sem_reg);
}
/*
* Notify other functions on HB failure.
*/
static void
bfa_ioc_ct_notify_fail(struct bfa_ioc_s *ioc)
{
if (bfa_ioc_is_cna(ioc)) {
writel(__FW_INIT_HALT_P, ioc->ioc_regs.ll_halt);
writel(__FW_INIT_HALT_P, ioc->ioc_regs.alt_ll_halt);
/* Wait for halt to take effect */
readl(ioc->ioc_regs.ll_halt);
readl(ioc->ioc_regs.alt_ll_halt);
} else {
writel(~0U, ioc->ioc_regs.err_set);
readl(ioc->ioc_regs.err_set);
}
}
/*
* Host to LPU mailbox message addresses
*/
static struct { u32 hfn_mbox, lpu_mbox, hfn_pgn; } ct_fnreg[] = {
{ HOSTFN0_LPU_MBOX0_0, LPU_HOSTFN0_MBOX0_0, HOST_PAGE_NUM_FN0 },
{ HOSTFN1_LPU_MBOX0_8, LPU_HOSTFN1_MBOX0_8, HOST_PAGE_NUM_FN1