-----Original Message----- From: Tomas Henzl [mailto:thenzl@xxxxxxxxxx] Sent: Friday, May 22, 2015 7:02 AM To: Rajinikanth Pandurangan; jbottomley@xxxxxxxxxxxxx; linux-scsi@xxxxxxxxxxxxxxx Cc: aacraid@xxxxxxxxxxxxxx; Harry Yang; Rich Bono; Achim Leubner; Murthy Bhat Subject: Re: [PATCH 4/9] [SCSI] aacraid: Enable 64-bit write to controller register On 05/14/2015 02:12 AM, rajinikanth.pandurangan@xxxxxxxx wrote: > From: Rajinikanth Pandurangan <rajinikanth.pandurangan@xxxxxxxx> > > Description: > If writeq() not supported, then do atomic two 32bit write > > Signed-off-by: Rajinikanth Pandurangan > <rajinikanth.pandurangan@xxxxxxxx> > --- > drivers/scsi/aacraid/aacraid.h | 12 ++++++++++++ > drivers/scsi/aacraid/comminit.c | 1 + > drivers/scsi/aacraid/src.c | 12 ++++++++++-- > 3 files changed, 23 insertions(+), 2 deletions(-) > > diff --git a/drivers/scsi/aacraid/aacraid.h > b/drivers/scsi/aacraid/aacraid.h index 62b0999..9e69e3e 100644 > --- a/drivers/scsi/aacraid/aacraid.h > +++ b/drivers/scsi/aacraid/aacraid.h > @@ -719,6 +719,9 @@ struct sa_registers { > #define sa_readl(AEP, CSR) readl(&((AEP)->regs.sa->CSR)) > #define sa_writew(AEP, CSR, value) writew(value, &((AEP)->regs.sa->CSR)) > #define sa_writel(AEP, CSR, value) writel(value, &((AEP)->regs.sa->CSR)) > +#if defined(writeq) > +#define sa_writeq(AEP, CSR, value) writeq(value, &((AEP)->regs.sa->CSR)) This^ is used nowhere, is it needed? [rajp] Yes, it's not needed. > +#endif > > /* > * Rx Message Unit Registers > @@ -844,6 +847,10 @@ struct src_registers { > &((AEP)->regs.src.bar0->CSR)) > #define src_writel(AEP, CSR, value) writel(value, \ > &((AEP)->regs.src.bar0->CSR)) > +#if defined(writeq) > +#define src_writeq(AEP, CSR, value) writeq(value, \ > + &((AEP)->regs.src.bar0->CSR)) > +#endif > > #define SRC_ODR_SHIFT 12 > #define SRC_IDR_SHIFT 9 > @@ -1163,6 +1170,11 @@ struct aac_dev > struct fsa_dev_info *fsa_dev; > struct task_struct *thread; > int cardtype; > + /* > + *This lock will protect the two 32-bit > + *writes to the Inbound Queue > + */ > + spinlock_t iq_lock; > > /* > * The following is the device specific extension. > diff --git a/drivers/scsi/aacraid/comminit.c > b/drivers/scsi/aacraid/comminit.c index 45a0a04..4043245 100644 > --- a/drivers/scsi/aacraid/comminit.c > +++ b/drivers/scsi/aacraid/comminit.c > @@ -424,6 +424,7 @@ struct aac_dev *aac_init_adapter(struct aac_dev *dev) > dev->management_fib_count = 0; > spin_lock_init(&dev->manage_lock); > spin_lock_init(&dev->sync_lock); > + spin_lock_init(&dev->iq_lock); > dev->max_fib_size = sizeof(struct hw_fib); > dev->sg_tablesize = host->sg_tablesize = (dev->max_fib_size > - sizeof(struct aac_fibhdr) > diff --git a/drivers/scsi/aacraid/src.c b/drivers/scsi/aacraid/src.c > index ae494c5..109863a 100644 > --- a/drivers/scsi/aacraid/src.c > +++ b/drivers/scsi/aacraid/src.c > @@ -447,6 +447,10 @@ static int aac_src_deliver_message(struct fib *fib) > u32 fibsize; > dma_addr_t address; > struct aac_fib_xporthdr *pFibX; > +#if !defined(writeq) > + unsigned long flags; > +#endif > + > u16 hdr_size = le16_to_cpu(fib->hw_fib_va->header.Size); > > atomic_inc(&q->numpending); > @@ -511,10 +515,14 @@ static int aac_src_deliver_message(struct fib *fib) > return -EINVAL; > address |= fibsize; > } > - > +#if defined(writeq) > + src_writeq(dev, MUnit.IQ_L, (u64)address); What about just using the writeq directly without the macro ? writeq(value, address); ? [Rajp] All other place we have macro. This is just for the uniformity. > +#else > + spin_lock_irqsave(&fib->dev->iq_lock, flags); > src_writel(dev, MUnit.IQ_H, upper_32_bits(address) & 0xffffffff); > src_writel(dev, MUnit.IQ_L, address & 0xffffffff); > - > + spin_unlock_irqrestore(&fib->dev->iq_lock, flags); #endif > return 0; > } > > -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
