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[SCSI] bfa: kdump fix on 815 and 825 adapters 

Root cause: When kernel crashes, On brocade 815/825 adapters,
 bfa IOC state machine and FW doesn't get a notification and
hence are not cleanly shutdown. So registers holding driver/IOC
state information are not reset back to valid disabled/parking
values. This causes subsequent driver initialization to fail
during kdump kernel boot.

Fix description: during the initialization of first PCI function, reset
corresponding register when unclean shutown is detect by reading chip
registers. This will make sure that ioc/fw gets clean re-initialization.

Signed-off-by: Vijaya Mohan Guvva <vmohan@brocade.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Vijaya Mohan Guvva 2013-05-13 02:33:26 -07:00 committed by James Bottomley
parent f2a0cc3ffd
commit c679b599af
5 changed files with 150 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

42
drivers/scsi/bfa/bfa_ioc.c
View File

@ -67,6 +67,14 @@ BFA_TRC_FILE(CNA, IOC);
((__ioc)->ioc_hwif->ioc_sync_ack(__ioc))
#define bfa_ioc_sync_complete(__ioc) \
((__ioc)->ioc_hwif->ioc_sync_complete(__ioc))
#define bfa_ioc_set_cur_ioc_fwstate(__ioc, __fwstate) \
((__ioc)->ioc_hwif->ioc_set_fwstate(__ioc, __fwstate))
#define bfa_ioc_get_cur_ioc_fwstate(__ioc) \
((__ioc)->ioc_hwif->ioc_get_fwstate(__ioc))
#define bfa_ioc_set_alt_ioc_fwstate(__ioc, __fwstate) \
((__ioc)->ioc_hwif->ioc_set_alt_fwstate(__ioc, __fwstate))
#define bfa_ioc_get_alt_ioc_fwstate(__ioc) \
((__ioc)->ioc_hwif->ioc_get_alt_fwstate(__ioc))
#define bfa_ioc_mbox_cmd_pending(__ioc) \
(!list_empty(&((__ioc)->mbox_mod.cmd_q)) || \
@ -698,7 +706,7 @@ bfa_iocpf_sm_fwcheck_entry(struct bfa_iocpf_s *iocpf)
}
/* h/w sem init */
fwstate = readl(iocpf->ioc->ioc_regs.ioc_fwstate);
fwstate = bfa_ioc_get_cur_ioc_fwstate(iocpf->ioc);
if (fwstate == BFI_IOC_UNINIT) {
writel(1, iocpf->ioc->ioc_regs.ioc_init_sem_reg);
goto sem_get;
@ -725,8 +733,8 @@ bfa_iocpf_sm_fwcheck_entry(struct bfa_iocpf_s *iocpf)
bfa_trc(iocpf->ioc, fwstate);
bfa_trc(iocpf->ioc, swab32(fwhdr.exec));
writel(BFI_IOC_UNINIT, iocpf->ioc->ioc_regs.ioc_fwstate);
writel(BFI_IOC_UNINIT, iocpf->ioc->ioc_regs.alt_ioc_fwstate);
bfa_ioc_set_cur_ioc_fwstate(iocpf->ioc, BFI_IOC_UNINIT);
bfa_ioc_set_alt_ioc_fwstate(iocpf->ioc, BFI_IOC_UNINIT);
/*
* Unlock the hw semaphore. Should be here only once per boot.
@ -1037,7 +1045,7 @@ bfa_iocpf_sm_disabling(struct bfa_iocpf_s *iocpf, enum iocpf_event event)
*/
case IOCPF_E_TIMEOUT:
writel(BFI_IOC_FAIL, ioc->ioc_regs.ioc_fwstate);
bfa_ioc_set_cur_ioc_fwstate(ioc, BFI_IOC_FAIL);
bfa_fsm_set_state(iocpf, bfa_iocpf_sm_disabling_sync);
break;
@ -1138,7 +1146,7 @@ bfa_iocpf_sm_initfail_sync(struct bfa_iocpf_s *iocpf, enum iocpf_event event)
case IOCPF_E_SEMLOCKED:
bfa_ioc_notify_fail(ioc);
bfa_ioc_sync_leave(ioc);
writel(BFI_IOC_FAIL, ioc->ioc_regs.ioc_fwstate);
bfa_ioc_set_cur_ioc_fwstate(ioc, BFI_IOC_FAIL);
writel(1, ioc->ioc_regs.ioc_sem_reg);
bfa_fsm_set_state(iocpf, bfa_iocpf_sm_initfail);
break;
@ -1227,7 +1235,7 @@ bfa_iocpf_sm_fail_sync(struct bfa_iocpf_s *iocpf, enum iocpf_event event)
bfa_ioc_notify_fail(ioc);
if (!iocpf->auto_recover) {
bfa_ioc_sync_leave(ioc);
writel(BFI_IOC_FAIL, ioc->ioc_regs.ioc_fwstate);
bfa_ioc_set_cur_ioc_fwstate(ioc, BFI_IOC_FAIL);
writel(1, ioc->ioc_regs.ioc_sem_reg);
bfa_fsm_set_state(iocpf, bfa_iocpf_sm_fail);
} else {
@ -1519,7 +1527,7 @@ bfa_ioc_hwinit(struct bfa_ioc_s *ioc, bfa_boolean_t force)
u32 boot_type;
u32 boot_env;
ioc_fwstate = readl(ioc->ioc_regs.ioc_fwstate);
ioc_fwstate = bfa_ioc_get_cur_ioc_fwstate(ioc);
if (force)
ioc_fwstate = BFI_IOC_UNINIT;
@ -2006,11 +2014,11 @@ bfa_ioc_boot(struct bfa_ioc_s *ioc, u32 boot_type, u32 boot_env)
* Initialize IOC state of all functions on a chip reset.
*/
if (boot_type == BFI_FWBOOT_TYPE_MEMTEST) {
writel(BFI_IOC_MEMTEST, ioc->ioc_regs.ioc_fwstate);
writel(BFI_IOC_MEMTEST, ioc->ioc_regs.alt_ioc_fwstate);
bfa_ioc_set_cur_ioc_fwstate(ioc, BFI_IOC_MEMTEST);
bfa_ioc_set_alt_ioc_fwstate(ioc, BFI_IOC_MEMTEST);
} else {
writel(BFI_IOC_INITING, ioc->ioc_regs.ioc_fwstate);
writel(BFI_IOC_INITING, ioc->ioc_regs.alt_ioc_fwstate);
bfa_ioc_set_cur_ioc_fwstate(ioc, BFI_IOC_INITING);
bfa_ioc_set_alt_ioc_fwstate(ioc, BFI_IOC_INITING);
}
bfa_ioc_msgflush(ioc);
@ -2038,7 +2046,7 @@ bfa_ioc_is_operational(struct bfa_ioc_s *ioc)
bfa_boolean_t
bfa_ioc_is_initialized(struct bfa_ioc_s *ioc)
{
u32 r32 = readl(ioc->ioc_regs.ioc_fwstate);
u32 r32 = bfa_ioc_get_cur_ioc_fwstate(ioc);
return ((r32 != BFI_IOC_UNINIT) &&
(r32 != BFI_IOC_INITING) &&
@ -2430,12 +2438,12 @@ bfa_ioc_adapter_is_disabled(struct bfa_ioc_s *ioc)
if (!bfa_fsm_cmp_state(ioc, bfa_ioc_sm_disabled))
return BFA_FALSE;
ioc_state = readl(ioc->ioc_regs.ioc_fwstate);
ioc_state = bfa_ioc_get_cur_ioc_fwstate(ioc);
if (!bfa_ioc_state_disabled(ioc_state))
return BFA_FALSE;
if (ioc->pcidev.device_id != BFA_PCI_DEVICE_ID_FC_8G1P) {
ioc_state = readl(ioc->ioc_regs.alt_ioc_fwstate);
ioc_state = bfa_ioc_get_cur_ioc_fwstate(ioc);
if (!bfa_ioc_state_disabled(ioc_state))
return BFA_FALSE;
}
@ -2449,8 +2457,8 @@ bfa_ioc_adapter_is_disabled(struct bfa_ioc_s *ioc)
void
bfa_ioc_reset_fwstate(struct bfa_ioc_s *ioc)
{
writel(BFI_IOC_UNINIT, ioc->ioc_regs.ioc_fwstate);
writel(BFI_IOC_UNINIT, ioc->ioc_regs.alt_ioc_fwstate);
bfa_ioc_set_cur_ioc_fwstate(ioc, BFI_IOC_UNINIT);
bfa_ioc_set_alt_ioc_fwstate(ioc, BFI_IOC_UNINIT);
}
#define BFA_MFG_NAME "Brocade"
@ -2917,7 +2925,7 @@ bfa_iocpf_sem_timeout(void *ioc_arg)
static void
bfa_ioc_poll_fwinit(struct bfa_ioc_s *ioc)
{
u32 fwstate = readl(ioc->ioc_regs.ioc_fwstate);
u32 fwstate = bfa_ioc_get_cur_ioc_fwstate(ioc);
bfa_trc(ioc, fwstate);

6
drivers/scsi/bfa/bfa_ioc.h
View File

@ -346,6 +346,12 @@ struct bfa_ioc_hwif_s {
void (*ioc_sync_ack) (struct bfa_ioc_s *ioc);
bfa_boolean_t (*ioc_sync_complete) (struct bfa_ioc_s *ioc);
bfa_boolean_t (*ioc_lpu_read_stat) (struct bfa_ioc_s *ioc);
void (*ioc_set_fwstate) (struct bfa_ioc_s *ioc,
enum bfi_ioc_state fwstate);
enum bfi_ioc_state (*ioc_get_fwstate) (struct bfa_ioc_s *ioc);
void (*ioc_set_alt_fwstate) (struct bfa_ioc_s *ioc,
enum bfi_ioc_state fwstate);
enum bfi_ioc_state (*ioc_get_alt_fwstate) (struct bfa_ioc_s *ioc);
};
/*

86
drivers/scsi/bfa/bfa_ioc_cb.c
View File

@ -22,6 +22,8 @@
BFA_TRC_FILE(CNA, IOC_CB);
#define bfa_ioc_cb_join_pos(__ioc) ((u32) (1 << BFA_IOC_CB_JOIN_SH))
/*
* forward declarations
*/
@ -37,6 +39,12 @@ 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;
@ -59,6 +67,10 @@ bfa_ioc_set_cb_hwif(struct bfa_ioc_s *ioc)
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;
}
@ -187,6 +199,20 @@ bfa_ioc_cb_isr_mode_set(struct bfa_ioc_s *ioc, bfa_boolean_t msix)
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);
}
@ -212,24 +238,66 @@ bfa_ioc_cb_ownership_reset(struct bfa_ioc_s *ioc)
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)
{
writel(BFI_IOC_FAIL, ioc->ioc_regs.ioc_fwstate);
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)
{
uint32_t fwstate, alt_fwstate;
fwstate = readl(ioc->ioc_regs.ioc_fwstate);
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
@ -257,7 +325,7 @@ bfa_ioc_cb_sync_complete(struct bfa_ioc_s *ioc)
fwstate == BFI_IOC_OP)
return BFA_TRUE;
else {
alt_fwstate = readl(ioc->ioc_regs.alt_ioc_fwstate);
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 ||
@ -272,7 +340,7 @@ bfa_ioc_cb_sync_complete(struct bfa_ioc_s *ioc)
bfa_status_t
bfa_ioc_cb_pll_init(void __iomem *rb, enum bfi_asic_mode fcmode)
{
u32 pll_sclk, pll_fclk;
u32 pll_sclk, pll_fclk, join_bits;
pll_sclk = __APP_PLL_SCLK_ENABLE | __APP_PLL_SCLK_LRESETN |
__APP_PLL_SCLK_P0_1(3U) |
@ -282,8 +350,12 @@ bfa_ioc_cb_pll_init(void __iomem *rb, enum bfi_asic_mode fcmode)
__APP_PLL_LCLK_RSEL200500 | __APP_PLL_LCLK_P0_1(3U) |
__APP_PLL_LCLK_JITLMT0_1(3U) |
__APP_PLL_LCLK_CNTLMT0_1(3U);
writel(BFI_IOC_UNINIT, (rb + BFA_IOC0_STATE_REG));
writel(BFI_IOC_UNINIT, (rb + BFA_IOC1_STATE_REG));
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));

36
drivers/scsi/bfa/bfa_ioc_ct.c
View File

@ -43,6 +43,12 @@ 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;
@ -512,6 +518,10 @@ bfa_ioc_set_ctx_hwif(struct bfa_ioc_s *ioc, struct bfa_ioc_hwif_s *hwif)
hwif->ioc_sync_leave = bfa_ioc_ct_sync_leave;
hwif->ioc_sync_ack = bfa_ioc_ct_sync_ack;
hwif->ioc_sync_complete = bfa_ioc_ct_sync_complete;
hwif->ioc_set_fwstate = bfa_ioc_ct_set_cur_ioc_fwstate;
hwif->ioc_get_fwstate = bfa_ioc_ct_get_cur_ioc_fwstate;
hwif->ioc_set_alt_fwstate = bfa_ioc_ct_set_alt_ioc_fwstate;
hwif->ioc_get_alt_fwstate = bfa_ioc_ct_get_alt_ioc_fwstate;
}
/**
@ -959,3 +969,29 @@ bfa_ioc_ct2_pll_init(void __iomem *rb, enum bfi_asic_mode mode)
return BFA_STATUS_OK;
}
static void
bfa_ioc_ct_set_cur_ioc_fwstate(struct bfa_ioc_s *ioc,
enum bfi_ioc_state fwstate)
{
writel(fwstate, ioc->ioc_regs.ioc_fwstate);
}
static enum bfi_ioc_state
bfa_ioc_ct_get_cur_ioc_fwstate(struct bfa_ioc_s *ioc)
{
return (enum bfi_ioc_state)readl(ioc->ioc_regs.ioc_fwstate);
}
static void
bfa_ioc_ct_set_alt_ioc_fwstate(struct bfa_ioc_s *ioc,
enum bfi_ioc_state fwstate)
{
writel(fwstate, ioc->ioc_regs.alt_ioc_fwstate);
}
static enum bfi_ioc_state
bfa_ioc_ct_get_alt_ioc_fwstate(struct bfa_ioc_s *ioc)
{
return (enum bfi_ioc_state) readl(ioc->ioc_regs.alt_ioc_fwstate);
}

4
drivers/scsi/bfa/bfi.h
View File

@ -374,6 +374,10 @@ enum bfi_ioc_state {
BFI_IOC_MEMTEST = 9, /* IOC is doing memtest */
};
#define BFA_IOC_CB_JOIN_SH 16
#define BFA_IOC_CB_FWSTATE_MASK 0x0000ffff
#define BFA_IOC_CB_JOIN_MASK 0xffff0000
#define BFI_IOC_ENDIAN_SIG 0x12345678
enum {