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linux/drivers/scsi/bfa/bfa_ioc_ct.c
Jing Huang 5fbe25c7a6 [SCSI] bfa: fix comments for c files 
This patch addresses the comments from Randy Dunlap (Randy.Dunlap@oracle.com)
regarding comment blocks that begining with "/**". bfa driver comments
currently do not follow kernel-doc convention, we hence replace all
/** with /* and **/ with */.

Signed-off-by: Jing Huang <huangj@brocade.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-10-25 16:28:09 -05:00

405 lines
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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 "bfa_ioc.h"
#include "bfi_ctreg.h"
#include "bfa_defs.h"
BFA_TRC_FILE(CNA, IOC_CT);
/*
* 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_reg_init(struct bfa_ioc_s *ioc);
static void bfa_ioc_ct_map_port(struct bfa_ioc_s *ioc);
static void bfa_ioc_ct_isr_mode_set(struct bfa_ioc_s *ioc, bfa_boolean_t msix);
static void bfa_ioc_ct_notify_hbfail(struct bfa_ioc_s *ioc);
static void bfa_ioc_ct_ownership_reset(struct bfa_ioc_s *ioc);
struct bfa_ioc_hwif_s hwif_ct;
/*
* Called from bfa_ioc_attach() to map asic specific calls.
*/
void
bfa_ioc_set_ct_hwif(struct bfa_ioc_s *ioc)
{
hwif_ct.ioc_pll_init = bfa_ioc_ct_pll_init;
hwif_ct.ioc_firmware_lock = bfa_ioc_ct_firmware_lock;
hwif_ct.ioc_firmware_unlock = bfa_ioc_ct_firmware_unlock;
hwif_ct.ioc_reg_init = bfa_ioc_ct_reg_init;
hwif_ct.ioc_map_port = bfa_ioc_ct_map_port;
hwif_ct.ioc_isr_mode_set = bfa_ioc_ct_isr_mode_set;
hwif_ct.ioc_notify_hbfail = bfa_ioc_ct_notify_hbfail;
hwif_ct.ioc_ownership_reset = bfa_ioc_ct_ownership_reset;
ioc->ioc_hwif = &hwif_ct;
}
/*
* 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;
/*
* Firmware match check is relevant only for CNA.
*/
if (!ioc->cna)
return BFA_TRUE;
/*
* If bios boot (flash based) -- do not increment usage count
*/
if (bfa_cb_image_get_size(BFA_IOC_FWIMG_TYPE(ioc)) <
BFA_IOC_FWIMG_MINSZ)
return BFA_TRUE;
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);
bfa_ioc_sem_release(ioc->ioc_regs.ioc_usage_sem_reg);
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.
*/
bfa_assert(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)) {
bfa_ioc_sem_release(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);
bfa_ioc_sem_release(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;
/*
* Firmware lock is relevant only for CNA.
*/
if (!ioc->cna)
return;
/*
* If bios boot (flash based) -- do not decrement usage count
*/
if (bfa_cb_image_get_size(BFA_IOC_FWIMG_TYPE(ioc)) <
BFA_IOC_FWIMG_MINSZ)
return;
/*
* decrement usage count
*/
bfa_ioc_sem_get(ioc->ioc_regs.ioc_usage_sem_reg);
usecnt = readl(ioc->ioc_regs.ioc_usage_reg);
bfa_assert(usecnt > 0);
usecnt--;
writel(usecnt, ioc->ioc_regs.ioc_usage_reg);
bfa_trc(ioc, usecnt);
bfa_ioc_sem_release(ioc->ioc_regs.ioc_usage_sem_reg);
}
/*
* Notify other functions on HB failure.
*/
static void
bfa_ioc_ct_notify_hbfail(struct bfa_ioc_s *ioc)
{
if (ioc->cna) {
writel(__FW_INIT_HALT_P, ioc->ioc_regs.ll_halt);
/* Wait for halt to take effect */
readl(ioc->ioc_regs.ll_halt);
} else {
writel(__PSS_ERR_STATUS_SET, 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; } iocreg_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 },
{ HOSTFN2_LPU_MBOX0_0, LPU_HOSTFN2_MBOX0_0, HOST_PAGE_NUM_FN2 },
{ HOSTFN3_LPU_MBOX0_8, LPU_HOSTFN3_MBOX0_8, HOST_PAGE_NUM_FN3 }
};
/*
* Host <-> LPU mailbox command/status registers - port 0
*/
static struct { u32 hfn, lpu; } iocreg_mbcmd_p0[] = {
{ HOSTFN0_LPU0_MBOX0_CMD_STAT, LPU0_HOSTFN0_MBOX0_CMD_STAT },
{ HOSTFN1_LPU0_MBOX0_CMD_STAT, LPU0_HOSTFN1_MBOX0_CMD_STAT },
{ HOSTFN2_LPU0_MBOX0_CMD_STAT, LPU0_HOSTFN2_MBOX0_CMD_STAT },
{ HOSTFN3_LPU0_MBOX0_CMD_STAT, LPU0_HOSTFN3_MBOX0_CMD_STAT }
};
/*
* Host <-> LPU mailbox command/status registers - port 1
*/
static struct { u32 hfn, lpu; } iocreg_mbcmd_p1[] = {
{ HOSTFN0_LPU1_MBOX0_CMD_STAT, LPU1_HOSTFN0_MBOX0_CMD_STAT },
{ HOSTFN1_LPU1_MBOX0_CMD_STAT, LPU1_HOSTFN1_MBOX0_CMD_STAT },
{ HOSTFN2_LPU1_MBOX0_CMD_STAT, LPU1_HOSTFN2_MBOX0_CMD_STAT },
{ HOSTFN3_LPU1_MBOX0_CMD_STAT, LPU1_HOSTFN3_MBOX0_CMD_STAT }
};
static void
bfa_ioc_ct_reg_init(struct bfa_ioc_s *ioc)
{
void __iomem *rb;
int pcifn = bfa_ioc_pcifn(ioc);
rb = bfa_ioc_bar0(ioc);
ioc->ioc_regs.hfn_mbox = rb + iocreg_fnreg[pcifn].hfn_mbox;
ioc->ioc_regs.lpu_mbox = rb + iocreg_fnreg[pcifn].lpu_mbox;
ioc->ioc_regs.host_page_num_fn = rb + iocreg_fnreg[pcifn].hfn_pgn;
if (ioc->port_id == 0) {
ioc->ioc_regs.heartbeat = rb + BFA_IOC0_HBEAT_REG;
ioc->ioc_regs.ioc_fwstate = rb + BFA_IOC0_STATE_REG;
ioc->ioc_regs.hfn_mbox_cmd = rb + iocreg_mbcmd_p0[pcifn].hfn;
ioc->ioc_regs.lpu_mbox_cmd = rb + iocreg_mbcmd_p0[pcifn].lpu;
ioc->ioc_regs.ll_halt = rb + FW_INIT_HALT_P0;
} else {
ioc->ioc_regs.heartbeat = (rb + BFA_IOC1_HBEAT_REG);
ioc->ioc_regs.ioc_fwstate = (rb + BFA_IOC1_STATE_REG);
ioc->ioc_regs.hfn_mbox_cmd = rb + iocreg_mbcmd_p1[pcifn].hfn;
ioc->ioc_regs.lpu_mbox_cmd = rb + iocreg_mbcmd_p1[pcifn].lpu;
ioc->ioc_regs.ll_halt = rb + FW_INIT_HALT_P1;
}
/*
* PSS control registers
*/
ioc->ioc_regs.pss_ctl_reg = (rb + PSS_CTL_REG);
ioc->ioc_regs.pss_err_status_reg = (rb + PSS_ERR_STATUS_REG);
ioc->ioc_regs.app_pll_fast_ctl_reg = (rb + APP_PLL_425_CTL_REG);
ioc->ioc_regs.app_pll_slow_ctl_reg = (rb + APP_PLL_312_CTL_REG);
/*
* IOC semaphore registers and serialization
*/
ioc->ioc_regs.ioc_sem_reg = (rb + HOST_SEM0_REG);
ioc->ioc_regs.ioc_usage_sem_reg = (rb + HOST_SEM1_REG);
ioc->ioc_regs.ioc_init_sem_reg = (rb + HOST_SEM2_REG);
ioc->ioc_regs.ioc_usage_reg = (rb + BFA_FW_USE_COUNT);
/*
* sram memory access
*/
ioc->ioc_regs.smem_page_start = (rb + PSS_SMEM_PAGE_START);
ioc->ioc_regs.smem_pg0 = BFI_IOC_SMEM_PG0_CT;
/*
* err set reg : for notification of hb failure in fcmode
*/
ioc->ioc_regs.err_set = (rb + ERR_SET_REG);
}
/*
* Initialize IOC to port mapping.
*/
#define FNC_PERS_FN_SHIFT(__fn) ((__fn) * 8)
static void
bfa_ioc_ct_map_port(struct bfa_ioc_s *ioc)
{
void __iomem *rb = ioc->pcidev.pci_bar_kva;
u32 r32;
/*
* For catapult, base port id on personality register and IOC type
*/
r32 = readl(rb + FNC_PERS_REG);
r32 >>= FNC_PERS_FN_SHIFT(bfa_ioc_pcifn(ioc));
ioc->port_id = (r32 & __F0_PORT_MAP_MK) >> __F0_PORT_MAP_SH;
bfa_trc(ioc, bfa_ioc_pcifn(ioc));
bfa_trc(ioc, ioc->port_id);
}
/*
* Set interrupt mode for a function: INTX or MSIX
*/
static void
bfa_ioc_ct_isr_mode_set(struct bfa_ioc_s *ioc, bfa_boolean_t msix)
{
void __iomem *rb = ioc->pcidev.pci_bar_kva;
u32 r32, mode;
r32 = readl(rb + FNC_PERS_REG);
bfa_trc(ioc, r32);
mode = (r32 >> FNC_PERS_FN_SHIFT(bfa_ioc_pcifn(ioc))) &
__F0_INTX_STATUS;
/*
* If already in desired mode, do not change anything
*/
if (!msix && mode)
return;
if (msix)
mode = __F0_INTX_STATUS_MSIX;
else
mode = __F0_INTX_STATUS_INTA;
r32 &= ~(__F0_INTX_STATUS << FNC_PERS_FN_SHIFT(bfa_ioc_pcifn(ioc)));
r32 |= (mode << FNC_PERS_FN_SHIFT(bfa_ioc_pcifn(ioc)));
bfa_trc(ioc, r32);
writel(r32, rb + FNC_PERS_REG);
}
/*
* Cleanup hw semaphore and usecnt registers
*/
static void
bfa_ioc_ct_ownership_reset(struct bfa_ioc_s *ioc)
{
if (ioc->cna) {
bfa_ioc_sem_get(ioc->ioc_regs.ioc_usage_sem_reg);
writel(0, ioc->ioc_regs.ioc_usage_reg);
bfa_ioc_sem_release(ioc->ioc_regs.ioc_usage_sem_reg);
}
/*
* Read the hw sem reg to make sure that it is locked
* before we clear it. If it is not locked, writing 1
* will lock it instead of clearing it.
*/
readl(ioc->ioc_regs.ioc_sem_reg);
bfa_ioc_hw_sem_release(ioc);
}
/*
* Check the firmware state to know if pll_init has been completed already
*/
bfa_boolean_t
bfa_ioc_ct_pll_init_complete(void __iomem *rb)
{
if ((readl(rb + BFA_IOC0_STATE_REG) == BFI_IOC_OP) ||
(readl(rb + BFA_IOC1_STATE_REG) == BFI_IOC_OP))
return BFA_TRUE;
return BFA_FALSE;
}
bfa_status_t
bfa_ioc_ct_pll_init(void __iomem *rb, bfa_boolean_t fcmode)
{
u32 pll_sclk, pll_fclk, r32;
pll_sclk = __APP_PLL_312_LRESETN | __APP_PLL_312_ENARST |
__APP_PLL_312_RSEL200500 | __APP_PLL_312_P0_1(3U) |
__APP_PLL_312_JITLMT0_1(3U) |
__APP_PLL_312_CNTLMT0_1(1U);
pll_fclk = __APP_PLL_425_LRESETN | __APP_PLL_425_ENARST |
__APP_PLL_425_RSEL200500 | __APP_PLL_425_P0_1(3U) |
__APP_PLL_425_JITLMT0_1(3U) |
__APP_PLL_425_CNTLMT0_1(1U);
if (fcmode) {
writel(0, (rb + OP_MODE));
writel(__APP_EMS_CMLCKSEL | __APP_EMS_REFCKBUFEN2 |
__APP_EMS_CHANNEL_SEL, (rb + ETH_MAC_SER_REG));
} else {
writel(__GLOBAL_FCOE_MODE, (rb + OP_MODE));
writel(__APP_EMS_REFCKBUFEN1, (rb + ETH_MAC_SER_REG));
}
writel(BFI_IOC_UNINIT, (rb + BFA_IOC0_STATE_REG));
writel(BFI_IOC_UNINIT, (rb + BFA_IOC1_STATE_REG));
writel(0xffffffffU, (rb + HOSTFN0_INT_MSK));
writel(0xffffffffU, (rb + HOSTFN1_INT_MSK));
writel(0xffffffffU, (rb + HOSTFN0_INT_STATUS));
writel(0xffffffffU, (rb + HOSTFN1_INT_STATUS));
writel(0xffffffffU, (rb + HOSTFN0_INT_MSK));
writel(0xffffffffU, (rb + HOSTFN1_INT_MSK));
writel(pll_sclk | __APP_PLL_312_LOGIC_SOFT_RESET,
rb + APP_PLL_312_CTL_REG);
writel(pll_fclk | __APP_PLL_425_LOGIC_SOFT_RESET,
rb + APP_PLL_425_CTL_REG);
writel(pll_sclk | __APP_PLL_312_LOGIC_SOFT_RESET | __APP_PLL_312_ENABLE,
rb + APP_PLL_312_CTL_REG);
writel(pll_fclk | __APP_PLL_425_LOGIC_SOFT_RESET | __APP_PLL_425_ENABLE,
rb + APP_PLL_425_CTL_REG);
readl(rb + HOSTFN0_INT_MSK);
udelay(2000);
writel(0xffffffffU, (rb + HOSTFN0_INT_STATUS));
writel(0xffffffffU, (rb + HOSTFN1_INT_STATUS));
writel(pll_sclk | __APP_PLL_312_ENABLE, rb + APP_PLL_312_CTL_REG);
writel(pll_fclk | __APP_PLL_425_ENABLE, rb + APP_PLL_425_CTL_REG);
if (!fcmode) {
writel(__PMM_1T_RESET_P, (rb + PMM_1T_RESET_REG_P0));
writel(__PMM_1T_RESET_P, (rb + PMM_1T_RESET_REG_P1));
}
r32 = readl((rb + PSS_CTL_REG));
r32 &= ~__PSS_LMEM_RESET;
writel(r32, (rb + PSS_CTL_REG));
udelay(1000);
if (!fcmode) {
writel(0, (rb + PMM_1T_RESET_REG_P0));
writel(0, (rb + PMM_1T_RESET_REG_P1));
}
writel(__EDRAM_BISTR_START, (rb + MBIST_CTL_REG));
udelay(1000);
r32 = readl((rb + MBIST_STAT_REG));
writel(0, (rb + MBIST_CTL_REG));
return BFA_STATUS_OK;
}
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