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[SCSI] bfa: Serialize the IOC hw semaphore unlock logic. 

Made changes to ensure only the function that comes first will execute
the IOC hw semaphore unlock logic.
Used IOC init sem register to serialize execution of the unlock logic.

Signed-off-by: Krishna Gudipati <kgudipat@brocade.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Krishna Gudipati 2012-03-13 17:38:56 -07:00 committed by James Bottomley
parent 1f67096ca5
commit 8919678eaa
1 changed files with 49 additions and 15 deletions
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64
drivers/scsi/bfa/bfa_ioc.c
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@ -97,7 +97,6 @@ static void bfa_ioc_debug_save_ftrc(struct bfa_ioc_s *ioc);
static void bfa_ioc_fail_notify(struct bfa_ioc_s *ioc);
static void bfa_ioc_pf_fwmismatch(struct bfa_ioc_s *ioc);
/*
* IOC state machine definitions/declarations
*/
@ -738,26 +737,60 @@ static void
bfa_iocpf_sm_fwcheck_entry(struct bfa_iocpf_s *iocpf)
{
struct bfi_ioc_image_hdr_s fwhdr;
u32 fwstate = readl(iocpf->ioc->ioc_regs.ioc_fwstate);
u32 r32, fwstate, pgnum, pgoff, loff = 0;
int i;
/*
* Spin on init semaphore to serialize.
*/
r32 = readl(iocpf->ioc->ioc_regs.ioc_init_sem_reg);
while (r32 & 0x1) {
udelay(20);
r32 = readl(iocpf->ioc->ioc_regs.ioc_init_sem_reg);
}
/* h/w sem init */
if (fwstate == BFI_IOC_UNINIT)
fwstate = readl(iocpf->ioc->ioc_regs.ioc_fwstate);
if (fwstate == BFI_IOC_UNINIT) {
writel(1, iocpf->ioc->ioc_regs.ioc_init_sem_reg);
goto sem_get;
}
bfa_ioc_fwver_get(iocpf->ioc, &fwhdr);
if (swab32(fwhdr.exec) == BFI_FWBOOT_TYPE_NORMAL)
if (swab32(fwhdr.exec) == BFI_FWBOOT_TYPE_NORMAL) {
writel(1, iocpf->ioc->ioc_regs.ioc_init_sem_reg);
goto sem_get;
bfa_trc(iocpf->ioc, fwstate);
bfa_trc(iocpf->ioc, fwhdr.exec);
writel(BFI_IOC_UNINIT, iocpf->ioc->ioc_regs.ioc_fwstate);
}
/*
* Try to lock and then unlock the semaphore.
* Clear fwver hdr
*/
pgnum = PSS_SMEM_PGNUM(iocpf->ioc->ioc_regs.smem_pg0, loff);
pgoff = PSS_SMEM_PGOFF(loff);
writel(pgnum, iocpf->ioc->ioc_regs.host_page_num_fn);
for (i = 0; i < sizeof(struct bfi_ioc_image_hdr_s) / sizeof(u32); i++) {
bfa_mem_write(iocpf->ioc->ioc_regs.smem_page_start, loff, 0);
loff += sizeof(u32);
}
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);
/*
* Unlock the hw semaphore. Should be here only once per boot.
*/
readl(iocpf->ioc->ioc_regs.ioc_sem_reg);
writel(1, iocpf->ioc->ioc_regs.ioc_sem_reg);
/*
* unlock init semaphore.
*/
writel(1, iocpf->ioc->ioc_regs.ioc_init_sem_reg);
sem_get:
bfa_ioc_hw_sem_get(iocpf->ioc);
}
@ -1707,11 +1740,6 @@ bfa_ioc_download_fw(struct bfa_ioc_s *ioc, u32 boot_type,
u32 i;
u32 asicmode;
/*
* Initialize LMEM first before code download
*/
bfa_ioc_lmem_init(ioc);
bfa_trc(ioc, bfa_cb_image_get_size(bfa_ioc_asic_gen(ioc)));
fwimg = bfa_cb_image_get_chunk(bfa_ioc_asic_gen(ioc), chunkno);
@ -1999,6 +2027,12 @@ bfa_ioc_pll_init(struct bfa_ioc_s *ioc)
bfa_ioc_pll_init_asic(ioc);
ioc->pllinit = BFA_TRUE;
/*
* Initialize LMEM
*/
bfa_ioc_lmem_init(ioc);
/*
* release semaphore.
*/
@ -4772,7 +4806,7 @@ diag_ledtest_send(struct bfa_diag_s *diag, struct bfa_diag_ledtest_s *ledtest)
}
static void
diag_ledtest_comp(struct bfa_diag_s *diag, struct bfi_diag_ledtest_rsp_s * msg)
diag_ledtest_comp(struct bfa_diag_s *diag, struct bfi_diag_ledtest_rsp_s *msg)
{
bfa_trc(diag, diag->ledtest.lock);
diag->ledtest.lock = BFA_FALSE;