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alistair23-linux/drivers/scsi/bfa/bfa_ioc_cb.c
Thomas Gleixner 52fa7bf9ea treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 292 
Based on 1 normalized pattern(s):

  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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 66 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Alexios Zavras <alexios.zavras@intel.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190529141901.606369721@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-05 17:36:38 +02:00

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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2005-2014 Brocade Communications Systems, Inc.
* Copyright (c) 2014- QLogic Corporation.
* All rights reserved
* www.qlogic.com
*
* Linux driver for QLogic BR-series Fibre Channel Host Bus Adapter.
*/
#include "bfad_drv.h"
#include "bfa_ioc.h"
#include "bfi_reg.h"
#include "bfa_defs.h"
BFA_TRC_FILE(CNA, IOC_CB);
#define bfa_ioc_cb_join_pos(__ioc) ((u32) (1 << BFA_IOC_CB_JOIN_SH))
/*
* forward declarations
*/
static bfa_boolean_t bfa_ioc_cb_firmware_lock(struct bfa_ioc_s *ioc);
static void bfa_ioc_cb_firmware_unlock(struct bfa_ioc_s *ioc);
static void bfa_ioc_cb_reg_init(struct bfa_ioc_s *ioc);
static void bfa_ioc_cb_map_port(struct bfa_ioc_s *ioc);
static void bfa_ioc_cb_isr_mode_set(struct bfa_ioc_s *ioc, bfa_boolean_t msix);
static void bfa_ioc_cb_notify_fail(struct bfa_ioc_s *ioc);
static void bfa_ioc_cb_ownership_reset(struct bfa_ioc_s *ioc);
static bfa_boolean_t bfa_ioc_cb_sync_start(struct bfa_ioc_s *ioc);
static void bfa_ioc_cb_sync_join(struct bfa_ioc_s *ioc);
static void bfa_ioc_cb_sync_leave(struct bfa_ioc_s *ioc);
static void bfa_ioc_cb_sync_ack(struct bfa_ioc_s *ioc);
static bfa_boolean_t bfa_ioc_cb_sync_complete(struct bfa_ioc_s *ioc);
static void bfa_ioc_cb_set_cur_ioc_fwstate(
struct bfa_ioc_s *ioc, enum bfi_ioc_state fwstate);
static enum bfi_ioc_state bfa_ioc_cb_get_cur_ioc_fwstate(struct bfa_ioc_s *ioc);
static void bfa_ioc_cb_set_alt_ioc_fwstate(
struct bfa_ioc_s *ioc, enum bfi_ioc_state fwstate);
static enum bfi_ioc_state bfa_ioc_cb_get_alt_ioc_fwstate(struct bfa_ioc_s *ioc);
static struct bfa_ioc_hwif_s hwif_cb;
/*
* Called from bfa_ioc_attach() to map asic specific calls.
*/
void
bfa_ioc_set_cb_hwif(struct bfa_ioc_s *ioc)
{
hwif_cb.ioc_pll_init = bfa_ioc_cb_pll_init;
hwif_cb.ioc_firmware_lock = bfa_ioc_cb_firmware_lock;
hwif_cb.ioc_firmware_unlock = bfa_ioc_cb_firmware_unlock;
hwif_cb.ioc_reg_init = bfa_ioc_cb_reg_init;
hwif_cb.ioc_map_port = bfa_ioc_cb_map_port;
hwif_cb.ioc_isr_mode_set = bfa_ioc_cb_isr_mode_set;
hwif_cb.ioc_notify_fail = bfa_ioc_cb_notify_fail;
hwif_cb.ioc_ownership_reset = bfa_ioc_cb_ownership_reset;
hwif_cb.ioc_sync_start = bfa_ioc_cb_sync_start;
hwif_cb.ioc_sync_join = bfa_ioc_cb_sync_join;
hwif_cb.ioc_sync_leave = bfa_ioc_cb_sync_leave;
hwif_cb.ioc_sync_ack = bfa_ioc_cb_sync_ack;
hwif_cb.ioc_sync_complete = bfa_ioc_cb_sync_complete;
hwif_cb.ioc_set_fwstate = bfa_ioc_cb_set_cur_ioc_fwstate;
hwif_cb.ioc_get_fwstate = bfa_ioc_cb_get_cur_ioc_fwstate;
hwif_cb.ioc_set_alt_fwstate = bfa_ioc_cb_set_alt_ioc_fwstate;
hwif_cb.ioc_get_alt_fwstate = bfa_ioc_cb_get_alt_ioc_fwstate;
ioc->ioc_hwif = &hwif_cb;
}
/*
* Return true if firmware of current driver matches the running firmware.
*/
static bfa_boolean_t
bfa_ioc_cb_firmware_lock(struct bfa_ioc_s *ioc)
{
enum bfi_ioc_state alt_fwstate, cur_fwstate;
struct bfi_ioc_image_hdr_s fwhdr;
cur_fwstate = bfa_ioc_cb_get_cur_ioc_fwstate(ioc);
bfa_trc(ioc, cur_fwstate);
alt_fwstate = bfa_ioc_cb_get_alt_ioc_fwstate(ioc);
bfa_trc(ioc, alt_fwstate);
/*
* Uninit implies this is the only driver as of now.
*/
if (cur_fwstate == BFI_IOC_UNINIT)
return BFA_TRUE;
/*
* Check if another driver with a different firmware is active
*/
bfa_ioc_fwver_get(ioc, &fwhdr);
if (!bfa_ioc_fwver_cmp(ioc, &fwhdr) &&
alt_fwstate != BFI_IOC_DISABLED) {
bfa_trc(ioc, alt_fwstate);
return BFA_FALSE;
}
return BFA_TRUE;
}
static void
bfa_ioc_cb_firmware_unlock(struct bfa_ioc_s *ioc)
{
}
/*
* Notify other functions on HB failure.
*/
static void
bfa_ioc_cb_notify_fail(struct bfa_ioc_s *ioc)
{
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; } 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 }
};
/*
* Host <-> LPU mailbox command/status registers
*/
static struct { u32 hfn, lpu; } iocreg_mbcmd[] = {
{ HOSTFN0_LPU0_CMD_STAT, LPU0_HOSTFN0_CMD_STAT },
{ HOSTFN1_LPU1_CMD_STAT, LPU1_HOSTFN1_CMD_STAT }
};
static void
bfa_ioc_cb_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.alt_ioc_fwstate = rb + BFA_IOC1_STATE_REG;
} else {
ioc->ioc_regs.heartbeat = (rb + BFA_IOC1_HBEAT_REG);
ioc->ioc_regs.ioc_fwstate = (rb + BFA_IOC1_STATE_REG);
ioc->ioc_regs.alt_ioc_fwstate = (rb + BFA_IOC0_STATE_REG);
}
/*
* Host <-> LPU mailbox command/status registers
*/
ioc->ioc_regs.hfn_mbox_cmd = rb + iocreg_mbcmd[pcifn].hfn;
ioc->ioc_regs.lpu_mbox_cmd = rb + iocreg_mbcmd[pcifn].lpu;
/*
* 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_LCLK_CTL_REG);
ioc->ioc_regs.app_pll_slow_ctl_reg = (rb + APP_PLL_SCLK_CTL_REG);
/*
* IOC semaphore registers and serialization
*/
ioc->ioc_regs.ioc_sem_reg = (rb + HOST_SEM0_REG);
ioc->ioc_regs.ioc_init_sem_reg = (rb + HOST_SEM2_REG);
/*
* sram memory access
*/
ioc->ioc_regs.smem_page_start = (rb + PSS_SMEM_PAGE_START);
ioc->ioc_regs.smem_pg0 = BFI_IOC_SMEM_PG0_CB;
/*
* err set reg : for notification of hb failure
*/
ioc->ioc_regs.err_set = (rb + ERR_SET_REG);
}
/*
* Initialize IOC to port mapping.
*/
static void
bfa_ioc_cb_map_port(struct bfa_ioc_s *ioc)
{
/*
* For crossbow, port id is same as pci function.
*/
ioc->port_id = bfa_ioc_pcifn(ioc);
bfa_trc(ioc, ioc->port_id);
}
/*
* Set interrupt mode for a function: INTX or MSIX
*/
static void
bfa_ioc_cb_isr_mode_set(struct bfa_ioc_s *ioc, bfa_boolean_t msix)
{
}
/*
* Synchronized IOC failure processing routines
*/
static bfa_boolean_t
bfa_ioc_cb_sync_start(struct bfa_ioc_s *ioc)
{
u32 ioc_fwstate = readl(ioc->ioc_regs.ioc_fwstate);
/**
* Driver load time. If the join bit is set,
* it is due to an unclean exit by the driver for this
* PCI fn in the previous incarnation. Whoever comes here first
* should clean it up, no matter which PCI fn.
*/
if (ioc_fwstate & BFA_IOC_CB_JOIN_MASK) {
writel(BFI_IOC_UNINIT, ioc->ioc_regs.ioc_fwstate);
writel(BFI_IOC_UNINIT, ioc->ioc_regs.alt_ioc_fwstate);
return BFA_TRUE;
}
return bfa_ioc_cb_sync_complete(ioc);
}
/*
* Cleanup hw semaphore and usecnt registers
*/
static void
bfa_ioc_cb_ownership_reset(struct bfa_ioc_s *ioc)
{
/*
* 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);
writel(1, ioc->ioc_regs.ioc_sem_reg);
}
/*
* Synchronized IOC failure processing routines
*/
static void
bfa_ioc_cb_sync_join(struct bfa_ioc_s *ioc)
{
u32 r32 = readl(ioc->ioc_regs.ioc_fwstate);
u32 join_pos = bfa_ioc_cb_join_pos(ioc);
writel((r32 | join_pos), ioc->ioc_regs.ioc_fwstate);
}
static void
bfa_ioc_cb_sync_leave(struct bfa_ioc_s *ioc)
{
u32 r32 = readl(ioc->ioc_regs.ioc_fwstate);
u32 join_pos = bfa_ioc_cb_join_pos(ioc);
writel((r32 & ~join_pos), ioc->ioc_regs.ioc_fwstate);
}
static void
bfa_ioc_cb_set_cur_ioc_fwstate(struct bfa_ioc_s *ioc,
enum bfi_ioc_state fwstate)
{
u32 r32 = readl(ioc->ioc_regs.ioc_fwstate);
writel((fwstate | (r32 & BFA_IOC_CB_JOIN_MASK)),
ioc->ioc_regs.ioc_fwstate);
}
static enum bfi_ioc_state
bfa_ioc_cb_get_cur_ioc_fwstate(struct bfa_ioc_s *ioc)
{
return (enum bfi_ioc_state)(readl(ioc->ioc_regs.ioc_fwstate) &
BFA_IOC_CB_FWSTATE_MASK);
}
static void
bfa_ioc_cb_set_alt_ioc_fwstate(struct bfa_ioc_s *ioc,
enum bfi_ioc_state fwstate)
{
u32 r32 = readl(ioc->ioc_regs.alt_ioc_fwstate);
writel((fwstate | (r32 & BFA_IOC_CB_JOIN_MASK)),
ioc->ioc_regs.alt_ioc_fwstate);
}
static enum bfi_ioc_state
bfa_ioc_cb_get_alt_ioc_fwstate(struct bfa_ioc_s *ioc)
{
return (enum bfi_ioc_state)(readl(ioc->ioc_regs.alt_ioc_fwstate) &
BFA_IOC_CB_FWSTATE_MASK);
}
static void
bfa_ioc_cb_sync_ack(struct bfa_ioc_s *ioc)
{
bfa_ioc_cb_set_cur_ioc_fwstate(ioc, BFI_IOC_FAIL);
}
static bfa_boolean_t
bfa_ioc_cb_sync_complete(struct bfa_ioc_s *ioc)
{
u32 fwstate, alt_fwstate;
fwstate = bfa_ioc_cb_get_cur_ioc_fwstate(ioc);
/*
* At this point, this IOC is hoding the hw sem in the
* start path (fwcheck) OR in the disable/enable path
* OR to check if the other IOC has acknowledged failure.
*
* So, this IOC can be in UNINIT, INITING, DISABLED, FAIL
* or in MEMTEST states. In a normal scenario, this IOC
* can not be in OP state when this function is called.
*
* However, this IOC could still be in OP state when
* the OS driver is starting up, if the OptROM code has
* left it in that state.
*
* If we had marked this IOC's fwstate as BFI_IOC_FAIL
* in the failure case and now, if the fwstate is not
* BFI_IOC_FAIL it implies that the other PCI fn have
* reinitialized the ASIC or this IOC got disabled, so
* return TRUE.
*/
if (fwstate == BFI_IOC_UNINIT ||
fwstate == BFI_IOC_INITING ||
fwstate == BFI_IOC_DISABLED ||
fwstate == BFI_IOC_MEMTEST ||
fwstate == BFI_IOC_OP)
return BFA_TRUE;
else {
alt_fwstate = bfa_ioc_cb_get_alt_ioc_fwstate(ioc);
if (alt_fwstate == BFI_IOC_FAIL ||
alt_fwstate == BFI_IOC_DISABLED ||
alt_fwstate == BFI_IOC_UNINIT ||
alt_fwstate == BFI_IOC_INITING ||
alt_fwstate == BFI_IOC_MEMTEST)
return BFA_TRUE;
else
return BFA_FALSE;
}
}
bfa_status_t
bfa_ioc_cb_pll_init(void __iomem *rb, enum bfi_asic_mode fcmode)
{
u32 pll_sclk, pll_fclk, join_bits;
pll_sclk = __APP_PLL_SCLK_ENABLE | __APP_PLL_SCLK_LRESETN |
__APP_PLL_SCLK_P0_1(3U) |
__APP_PLL_SCLK_JITLMT0_1(3U) |
__APP_PLL_SCLK_CNTLMT0_1(3U);
pll_fclk = __APP_PLL_LCLK_ENABLE | __APP_PLL_LCLK_LRESETN |
__APP_PLL_LCLK_RSEL200500 | __APP_PLL_LCLK_P0_1(3U) |
__APP_PLL_LCLK_JITLMT0_1(3U) |
__APP_PLL_LCLK_CNTLMT0_1(3U);
join_bits = readl(rb + BFA_IOC0_STATE_REG) &
BFA_IOC_CB_JOIN_MASK;
writel((BFI_IOC_UNINIT | join_bits), (rb + BFA_IOC0_STATE_REG));
join_bits = readl(rb + BFA_IOC1_STATE_REG) &
BFA_IOC_CB_JOIN_MASK;
writel((BFI_IOC_UNINIT | join_bits), (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(__APP_PLL_SCLK_LOGIC_SOFT_RESET, rb + APP_PLL_SCLK_CTL_REG);
writel(__APP_PLL_SCLK_BYPASS | __APP_PLL_SCLK_LOGIC_SOFT_RESET,
rb + APP_PLL_SCLK_CTL_REG);
writel(__APP_PLL_LCLK_LOGIC_SOFT_RESET, rb + APP_PLL_LCLK_CTL_REG);
writel(__APP_PLL_LCLK_BYPASS | __APP_PLL_LCLK_LOGIC_SOFT_RESET,
rb + APP_PLL_LCLK_CTL_REG);
udelay(2);
writel(__APP_PLL_SCLK_LOGIC_SOFT_RESET, rb + APP_PLL_SCLK_CTL_REG);
writel(__APP_PLL_LCLK_LOGIC_SOFT_RESET, rb + APP_PLL_LCLK_CTL_REG);
writel(pll_sclk | __APP_PLL_SCLK_LOGIC_SOFT_RESET,
rb + APP_PLL_SCLK_CTL_REG);
writel(pll_fclk | __APP_PLL_LCLK_LOGIC_SOFT_RESET,
rb + APP_PLL_LCLK_CTL_REG);
udelay(2000);
writel(0xffffffffU, (rb + HOSTFN0_INT_STATUS));
writel(0xffffffffU, (rb + HOSTFN1_INT_STATUS));
writel(pll_sclk, (rb + APP_PLL_SCLK_CTL_REG));
writel(pll_fclk, (rb + APP_PLL_LCLK_CTL_REG));
return BFA_STATUS_OK;
}
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