Re: [PATCH v3 13/17] arcmsr: fix ioctl data read/write error for adapter type C
From: Ching Huang
Date: Wed Aug 27 2014 - 23:40:32 EST
On Wed, 2014-08-27 at 14:29 +0200, Tomas Henzl wrote:
> On 08/27/2014 10:19 PM, Ching Huang wrote:
> > On Tue, 2014-08-26 at 15:20 +0200, Tomas Henzl wrote:
> >> On 08/26/2014 10:27 PM, Ching Huang wrote:
> >>> On Mon, 2014-08-25 at 12:29 +0200, Tomas Henzl wrote:
> >>>> On 08/25/2014 07:59 PM, Ching Huang wrote:
> >>>>> On Fri, 2014-08-22 at 18:00 +0200, Tomas Henzl wrote:
> >>>>>> On 08/19/2014 09:17 AM, Ching Huang wrote:
> >>>>>>> From: Ching Huang <ching2048@xxxxxxxxxxxx>
> >>>>>>>
> >>>>>>> Rewrite ioctl entry and its relate function.
> >>>>>>> This patch fix ioctl data read/write error and change data I/O access from byte to Dword.
> >>>>>>>
> >>>>>>> Signed-off-by: Ching Huang <ching2048@xxxxxxxxxxxx>
> >>>>>>> ---
> >>>>>>>
> >>>>>>> diff -uprN a/drivers/scsi/arcmsr/arcmsr_attr.c b/drivers/scsi/arcmsr/arcmsr_attr.c
> >>>>>>> --- a/drivers/scsi/arcmsr/arcmsr_attr.c 2014-02-06 17:47:24.000000000 +0800
> >>>>>>> +++ b/drivers/scsi/arcmsr/arcmsr_attr.c 2014-04-29 17:10:42.000000000 +0800
> >>>>>>> @@ -70,40 +70,75 @@ static ssize_t arcmsr_sysfs_iop_message_
> >>>>>>> struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
> >>>>>>> uint8_t *pQbuffer,*ptmpQbuffer;
> >>>>>>> int32_t allxfer_len = 0;
> >>>>>>> + unsigned long flags;
> >>>>>>>
> >>>>>>> if (!capable(CAP_SYS_ADMIN))
> >>>>>>> return -EACCES;
> >>>>>>>
> >>>>>>> /* do message unit read. */
> >>>>>>> ptmpQbuffer = (uint8_t *)buf;
> >>>>>>> - while ((acb->rqbuf_firstindex != acb->rqbuf_lastindex)
> >>>>>>> - && (allxfer_len < 1031)) {
> >>>>>>> + spin_lock_irqsave(&acb->rqbuffer_lock, flags);
> >>>>>>> + if (acb->rqbuf_firstindex != acb->rqbuf_lastindex) {
> >>>>>> Hi - does this condition (acb->rqbuf_firstindex == acb->rqbuf_lastindex) mean we could just release
> >>>>>> the spinlock and return ?
> >>>>>>
> >>>>> NO. We have to check the input buffer that may have message data come
> >>>>> from IOP.
> >>>>>>> pQbuffer = &acb->rqbuffer[acb->rqbuf_firstindex];
> >>>>>>> - memcpy(ptmpQbuffer, pQbuffer, 1);
> >>>>>>> - acb->rqbuf_firstindex++;
> >>>>>>> - acb->rqbuf_firstindex %= ARCMSR_MAX_QBUFFER;
> >>>>>>> - ptmpQbuffer++;
> >>>>>>> - allxfer_len++;
> >>>>>>> + if (acb->rqbuf_firstindex > acb->rqbuf_lastindex) {
> >>>>>>> + if ((ARCMSR_MAX_QBUFFER - acb->rqbuf_firstindex) >= 1032) {
> >>>>>>> + memcpy(ptmpQbuffer, pQbuffer, 1032);
> >>>>>>> + acb->rqbuf_firstindex += 1032;
> >>>>>>> + acb->rqbuf_firstindex %= ARCMSR_MAX_QBUFFER;
> >>>>>>> + allxfer_len = 1032;
> >>>>>>> + } else {
> >>>>>>> + if (((ARCMSR_MAX_QBUFFER - acb->rqbuf_firstindex)
> >>>>>>> + + acb->rqbuf_lastindex) > 1032) {
> >>>>>>> + memcpy(ptmpQbuffer, pQbuffer,
> >>>>>>> + ARCMSR_MAX_QBUFFER
> >>>>>>> + - acb->rqbuf_firstindex);
> >>>>>>> + ptmpQbuffer += ARCMSR_MAX_QBUFFER
> >>>>>>> + - acb->rqbuf_firstindex;
> >>>>>>> + memcpy(ptmpQbuffer, acb->rqbuffer, 1032
> >>>>>>> + - (ARCMSR_MAX_QBUFFER -
> >>>>>>> + acb->rqbuf_firstindex));
> >>>>>> This code looks like you were copying some data from a ring buffer,
> >>>>>> in that case - shouldn't be acb->rqbuf_lastindex used instead of firstindex?
> >>>>>>
> >>>>> Yes, there copying data from a ring buffer. firstindex and lastindex are
> >>>>> bad name. For readability, I rename the firstindex to getIndex,
> >>>>> lastindex to putIndex.
> >>>> My comment is not about names, but in this path '(ARCMSR_MAX_QBUFFER - acb->rqbuf_firstindex)+ acb->rqbuf_lastindex) > 1032)'
> >>>> you copy something twice and in both cases the 'firstindex' is used and never the 'lastindex'.
> >>>> Is this correct?
> >>> The firstindex is a get index and lastindex is a put index of a ring buffer.
> >>> At here, firstindex > lastindex, so the data remain in buffer are (ARCMSR_MAX_QBUFFER - acb->rqbuf_firstindex)+ acb->rqbuf_lastindex
> >> Yes, it's correct, I misinterpreted the from value with the amount of bytes to copy.
> >> But well it's also still overcomplicated and I believe that a copy like this could be
> >> rearranged with just few lines of code as a result - have you looked at the code I sent?
> >>
> >> Let's go with this patch as it is otherwise we will never end, repost is not needed because
> >> of this and also not because of arcmsr_Read_iop_rqbuffer_in_DWORD.
> >>
> >> I'll continue with reviewing the remaining patches.
> >>
> >> tomas
> >>
> > I have test the code you sent. It works.
> > I will modify the code by your idea, then send the patch.
>
> I think that after so many repost, and because it is not a fix, wait till we get this series in
> and post a new patch later.
> Btw. a similar copying is in arcmsr_iop_message_xfer too, and whet you want rename the fields
> in your ring buffer, please use the more usual names 'head+tail'.
>
> Conclusion - post nothing right now, let the changes go in in a new patch.
>
> tomash
>
Thanks Tomas' reminding, I have already made a modification in
arcmsr_iop_message_xfer().
>
> >
> > Thanks,
> > Ching
> >>>>>> What does the 1032 mean is that a hw. limit, actually could you explain the code
> >>>>>> should do? Maybe I'm just wrong with my assumptions.
> >>>>> 1032 is the API data buffer limitation.
> >>>>>> Thanks,
> >>>>>> Tomas
> >>>>>>
> >>>>>>> + acb->rqbuf_firstindex = 1032 -
> >>>>>>> + (ARCMSR_MAX_QBUFFER -
> >>>>>>> + acb->rqbuf_firstindex);
> >>>>>>> + allxfer_len = 1032;
> >>>>>>> + } else {
> >>>>>>> + memcpy(ptmpQbuffer, pQbuffer,
> >>>>>>> + ARCMSR_MAX_QBUFFER -
> >>>>>>> + acb->rqbuf_firstindex);
> >>>>>>> + ptmpQbuffer += ARCMSR_MAX_QBUFFER -
> >>>>>>> + acb->rqbuf_firstindex;
> >>>>>>> + memcpy(ptmpQbuffer, acb->rqbuffer,
> >>>>>>> + acb->rqbuf_lastindex);
> >>>>>>> + allxfer_len = ARCMSR_MAX_QBUFFER -
> >>>>>>> + acb->rqbuf_firstindex +
> >>>>>>> + acb->rqbuf_lastindex;
> >>>>>>> + acb->rqbuf_firstindex =
> >>>>>>> + acb->rqbuf_lastindex;
> >>>>>>> + }
> >>>>>>> + }
> >>>>>>> + } else {
> >>>>>>> + if ((acb->rqbuf_lastindex - acb->rqbuf_firstindex) > 1032) {
> >>>>>>> + memcpy(ptmpQbuffer, pQbuffer, 1032);
> >>>>>>> + acb->rqbuf_firstindex += 1032;
> >>>>>>> + allxfer_len = 1032;
> >>>>>>> + } else {
> >>>>>>> + memcpy(ptmpQbuffer, pQbuffer, acb->rqbuf_lastindex
> >>>>>>> + - acb->rqbuf_firstindex);
> >>>>>>> + allxfer_len = acb->rqbuf_lastindex -
> >>>>>>> + acb->rqbuf_firstindex;
> >>>>>>> + acb->rqbuf_firstindex = acb->rqbuf_lastindex;
> >>>>>>> + }
> >>>>>>> + }
> >>>>>>> }
> >>>>>>> if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
> >>>>>>> struct QBUFFER __iomem *prbuffer;
> >>>>>>> - uint8_t __iomem *iop_data;
> >>>>>>> - int32_t iop_len;
> >>>>>>> -
> >>>>>>> acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
> >>>>>>> prbuffer = arcmsr_get_iop_rqbuffer(acb);
> >>>>>>> - iop_data = prbuffer->data;
> >>>>>>> - iop_len = readl(&prbuffer->data_len);
> >>>>>>> - while (iop_len > 0) {
> >>>>>>> - acb->rqbuffer[acb->rqbuf_lastindex] = readb(iop_data);
> >>>>>>> - acb->rqbuf_lastindex++;
> >>>>>>> - acb->rqbuf_lastindex %= ARCMSR_MAX_QBUFFER;
> >>>>>>> - iop_data++;
> >>>>>>> - iop_len--;
> >>>>>>> - }
> >>>>>>> - arcmsr_iop_message_read(acb);
> >>>>>>> + if (arcmsr_Read_iop_rqbuffer_data(acb, prbuffer) == 0)
> >>>>>>> + acb->acb_flags |= ACB_F_IOPDATA_OVERFLOW;
> >>>>>>> }
> >>>>>>> - return (allxfer_len);
> >>>>>>> + spin_unlock_irqrestore(&acb->rqbuffer_lock, flags);
> >>>>>>> + return allxfer_len;
> >>>>>>> }
> >>>>>>>
> >>>>>>> static ssize_t arcmsr_sysfs_iop_message_write(struct file *filp,
> >>>>>>> @@ -117,6 +152,7 @@ static ssize_t arcmsr_sysfs_iop_message_
> >>>>>>> struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
> >>>>>>> int32_t my_empty_len, user_len, wqbuf_firstindex, wqbuf_lastindex;
> >>>>>>> uint8_t *pQbuffer, *ptmpuserbuffer;
> >>>>>>> + unsigned long flags;
> >>>>>>>
> >>>>>>> if (!capable(CAP_SYS_ADMIN))
> >>>>>>> return -EACCES;
> >>>>>>> @@ -125,18 +161,19 @@ static ssize_t arcmsr_sysfs_iop_message_
> >>>>>>> /* do message unit write. */
> >>>>>>> ptmpuserbuffer = (uint8_t *)buf;
> >>>>>>> user_len = (int32_t)count;
> >>>>>>> + spin_lock_irqsave(&acb->wqbuffer_lock, flags);
> >>>>>>> wqbuf_lastindex = acb->wqbuf_lastindex;
> >>>>>>> wqbuf_firstindex = acb->wqbuf_firstindex;
> >>>>>>> if (wqbuf_lastindex != wqbuf_firstindex) {
> >>>>>>> - arcmsr_post_ioctldata2iop(acb);
> >>>>>>> + arcmsr_write_ioctldata2iop(acb);
> >>>>>>> + spin_unlock_irqrestore(&acb->wqbuffer_lock, flags);
> >>>>>>> return 0; /*need retry*/
> >>>>>>> } else {
> >>>>>>> my_empty_len = (wqbuf_firstindex-wqbuf_lastindex - 1)
> >>>>>>> - &(ARCMSR_MAX_QBUFFER - 1);
> >>>>>>> + &(ARCMSR_MAX_QBUFFER - 1);
> >>>>>>> if (my_empty_len >= user_len) {
> >>>>>>> while (user_len > 0) {
> >>>>>>> - pQbuffer =
> >>>>>>> - &acb->wqbuffer[acb->wqbuf_lastindex];
> >>>>>>> + pQbuffer = &acb->wqbuffer[acb->wqbuf_lastindex];
> >>>>>>> memcpy(pQbuffer, ptmpuserbuffer, 1);
> >>>>>>> acb->wqbuf_lastindex++;
> >>>>>>> acb->wqbuf_lastindex %= ARCMSR_MAX_QBUFFER;
> >>>>>>> @@ -146,10 +183,12 @@ static ssize_t arcmsr_sysfs_iop_message_
> >>>>>>> if (acb->acb_flags & ACB_F_MESSAGE_WQBUFFER_CLEARED) {
> >>>>>>> acb->acb_flags &=
> >>>>>>> ~ACB_F_MESSAGE_WQBUFFER_CLEARED;
> >>>>>>> - arcmsr_post_ioctldata2iop(acb);
> >>>>>>> + arcmsr_write_ioctldata2iop(acb);
> >>>>>>> }
> >>>>>>> + spin_unlock_irqrestore(&acb->wqbuffer_lock, flags);
> >>>>>>> return count;
> >>>>>>> } else {
> >>>>>>> + spin_unlock_irqrestore(&acb->wqbuffer_lock, flags);
> >>>>>>> return 0; /*need retry*/
> >>>>>>> }
> >>>>>>> }
> >>>>>>> @@ -165,22 +204,24 @@ static ssize_t arcmsr_sysfs_iop_message_
> >>>>>>> struct Scsi_Host *host = class_to_shost(dev);
> >>>>>>> struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
> >>>>>>> uint8_t *pQbuffer;
> >>>>>>> + unsigned long flags;
> >>>>>>>
> >>>>>>> if (!capable(CAP_SYS_ADMIN))
> >>>>>>> return -EACCES;
> >>>>>>>
> >>>>>>> - if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
> >>>>>>> - acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
> >>>>>>> - arcmsr_iop_message_read(acb);
> >>>>>>> - }
> >>>>>>> + arcmsr_clear_iop2drv_rqueue_buffer(acb);
> >>>>>>> acb->acb_flags |=
> >>>>>>> (ACB_F_MESSAGE_WQBUFFER_CLEARED
> >>>>>>> | ACB_F_MESSAGE_RQBUFFER_CLEARED
> >>>>>>> | ACB_F_MESSAGE_WQBUFFER_READED);
> >>>>>>> + spin_lock_irqsave(&acb->rqbuffer_lock, flags);
> >>>>>>> acb->rqbuf_firstindex = 0;
> >>>>>>> acb->rqbuf_lastindex = 0;
> >>>>>>> + spin_unlock_irqrestore(&acb->rqbuffer_lock, flags);
> >>>>>>> + spin_lock_irqsave(&acb->wqbuffer_lock, flags);
> >>>>>>> acb->wqbuf_firstindex = 0;
> >>>>>>> acb->wqbuf_lastindex = 0;
> >>>>>>> + spin_unlock_irqrestore(&acb->wqbuffer_lock, flags);
> >>>>>>> pQbuffer = acb->rqbuffer;
> >>>>>>> memset(pQbuffer, 0, sizeof (struct QBUFFER));
> >>>>>>> pQbuffer = acb->wqbuffer;
> >>>>>>> diff -uprN a/drivers/scsi/arcmsr/arcmsr.h b/drivers/scsi/arcmsr/arcmsr.h
> >>>>>>> --- a/drivers/scsi/arcmsr/arcmsr.h 2014-05-06 15:28:38.000000000 +0800
> >>>>>>> +++ b/drivers/scsi/arcmsr/arcmsr.h 2014-05-06 15:28:58.000000000 +0800
> >>>>>>> @@ -518,6 +518,8 @@ struct AdapterControlBlock
> >>>>>>> uint32_t reg_mu_acc_handle0;
> >>>>>>> spinlock_t eh_lock;
> >>>>>>> spinlock_t ccblist_lock;
> >>>>>>> + spinlock_t rqbuffer_lock;
> >>>>>>> + spinlock_t wqbuffer_lock;
> >>>>>>> union {
> >>>>>>> struct MessageUnit_A __iomem *pmuA;
> >>>>>>> struct MessageUnit_B *pmuB;
> >>>>>>> @@ -693,8 +695,10 @@ struct SENSE_DATA
> >>>>>>> #define ARCMSR_MU_OUTBOUND_MESSAGE0_INTMASKENABLE 0x01
> >>>>>>> #define ARCMSR_MU_OUTBOUND_ALL_INTMASKENABLE 0x1F
> >>>>>>>
> >>>>>>> -extern void arcmsr_post_ioctldata2iop(struct AdapterControlBlock *);
> >>>>>>> -extern void arcmsr_iop_message_read(struct AdapterControlBlock *);
> >>>>>>> +extern void arcmsr_write_ioctldata2iop(struct AdapterControlBlock *);
> >>>>>>> +extern uint32_t arcmsr_Read_iop_rqbuffer_data(struct AdapterControlBlock *,
> >>>>>>> + struct QBUFFER __iomem *);
> >>>>>>> +extern void arcmsr_clear_iop2drv_rqueue_buffer(struct AdapterControlBlock *);
> >>>>>>> extern struct QBUFFER __iomem *arcmsr_get_iop_rqbuffer(struct AdapterControlBlock *);
> >>>>>>> extern struct device_attribute *arcmsr_host_attrs[];
> >>>>>>> extern int arcmsr_alloc_sysfs_attr(struct AdapterControlBlock *);
> >>>>>>> diff -uprN a/drivers/scsi/arcmsr/arcmsr_hba.c b/drivers/scsi/arcmsr/arcmsr_hba.c
> >>>>>>> --- a/drivers/scsi/arcmsr/arcmsr_hba.c 2014-08-14 18:40:38.000000000 +0800
> >>>>>>> +++ b/drivers/scsi/arcmsr/arcmsr_hba.c 2014-08-14 18:40:48.000000000 +0800
> >>>>>>> @@ -627,6 +627,8 @@ static int arcmsr_probe(struct pci_dev *
> >>>>>>> }
> >>>>>>> spin_lock_init(&acb->eh_lock);
> >>>>>>> spin_lock_init(&acb->ccblist_lock);
> >>>>>>> + spin_lock_init(&acb->rqbuffer_lock);
> >>>>>>> + spin_lock_init(&acb->wqbuffer_lock);
> >>>>>>> acb->acb_flags |= (ACB_F_MESSAGE_WQBUFFER_CLEARED |
> >>>>>>> ACB_F_MESSAGE_RQBUFFER_CLEARED |
> >>>>>>> ACB_F_MESSAGE_WQBUFFER_READED);
> >>>>>>> @@ -1423,68 +1425,174 @@ static struct QBUFFER __iomem *arcmsr_ge
> >>>>>>> return pqbuffer;
> >>>>>>> }
> >>>>>>>
> >>>>>>> -static void arcmsr_iop2drv_data_wrote_handle(struct AdapterControlBlock *acb)
> >>>>>>> -{
> >>>>>>> - struct QBUFFER __iomem *prbuffer;
> >>>>>>> - struct QBUFFER *pQbuffer;
> >>>>>>> - uint8_t __iomem *iop_data;
> >>>>>>> - int32_t my_empty_len, iop_len, rqbuf_firstindex, rqbuf_lastindex;
> >>>>>>> - rqbuf_lastindex = acb->rqbuf_lastindex;
> >>>>>>> - rqbuf_firstindex = acb->rqbuf_firstindex;
> >>>>>>> - prbuffer = arcmsr_get_iop_rqbuffer(acb);
> >>>>>>> - iop_data = (uint8_t __iomem *)prbuffer->data;
> >>>>>>> - iop_len = prbuffer->data_len;
> >>>>>>> - my_empty_len = (rqbuf_firstindex - rqbuf_lastindex - 1) & (ARCMSR_MAX_QBUFFER - 1);
> >>>>>>> +static uint32_t arcmsr_Read_iop_rqbuffer_in_DWORD(struct AdapterControlBlock *acb,
> >>>>>>> + struct QBUFFER __iomem *prbuffer) {
> >>>>>>>
> >>>>>>> - if (my_empty_len >= iop_len)
> >>>>>>> - {
> >>>>>>> - while (iop_len > 0) {
> >>>>>>> - pQbuffer = (struct QBUFFER *)&acb->rqbuffer[rqbuf_lastindex];
> >>>>>>> - memcpy(pQbuffer, iop_data, 1);
> >>>>>>> - rqbuf_lastindex++;
> >>>>>>> - rqbuf_lastindex %= ARCMSR_MAX_QBUFFER;
> >>>>>>> + uint8_t *pQbuffer;
> >>>>>>> + uint8_t *buf1 = NULL;
> >>>>>>> + uint32_t __iomem *iop_data;
> >>>>>>> + uint32_t iop_len, data_len, *buf2 = NULL;
> >>>>>>> +
> >>>>>>> + iop_data = (uint32_t __iomem *)prbuffer->data;
> >>>>>>> + iop_len = readl(&prbuffer->data_len);
> >>>>>>> + if (iop_len > 0) {
> >>>>>>> + buf1 = kmalloc(128, GFP_ATOMIC);
> >>>>>>> + buf2 = (uint32_t *)buf1;
> >>>>>>> + if (buf1 == NULL)
> >>>>>>> + return 0;
> >>>>>>> + data_len = iop_len;
> >>>>>>> + while (data_len >= 4) {
> >>>>>>> + *buf2++ = readl(iop_data);
> >>>>>>> iop_data++;
> >>>>>>> - iop_len--;
> >>>>>>> + data_len -= 4;
> >>>>>>> }
> >>>>>>> - acb->rqbuf_lastindex = rqbuf_lastindex;
> >>>>>>> - arcmsr_iop_message_read(acb);
> >>>>>>> + if (data_len)
> >>>>>>> + *buf2 = readl(iop_data);
> >>>>>>> + buf2 = (uint32_t *)buf1;
> >>>>>>> + }
> >>>>>>> + while (iop_len > 0) {
> >>>>>>> + pQbuffer = &acb->rqbuffer[acb->rqbuf_lastindex];
> >>>>>>> + *pQbuffer = *buf1;
> >>>>>>> + acb->rqbuf_lastindex++;
> >>>>>>> + /* if last, index number set it to 0 */
> >>>>>>> + acb->rqbuf_lastindex %= ARCMSR_MAX_QBUFFER;
> >>>>>>> + buf1++;
> >>>>>>> + iop_len--;
> >>>>>>> + }
> >>>>>>> + if (buf2)
> >>>>>> This test is not needed.
> >>>>>>
> >>>>>>> + kfree(buf2);
> >>>>>>> + /* let IOP know data has been read */
> >>>>>>> + arcmsr_iop_message_read(acb);
> >>>>>>> + return 1;
> >>>>>>> +}
> >>>>>>> +
> >>>>>>> +uint32_t
> >>>>>>> +arcmsr_Read_iop_rqbuffer_data(struct AdapterControlBlock *acb,
> >>>>>>> + struct QBUFFER __iomem *prbuffer) {
> >>>>>>> +
> >>>>>>> + uint8_t *pQbuffer;
> >>>>>>> + uint8_t __iomem *iop_data;
> >>>>>>> + uint32_t iop_len;
> >>>>>>> +
> >>>>>>> + if (acb->adapter_type & ACB_ADAPTER_TYPE_C)
> >>>>>>> + return arcmsr_Read_iop_rqbuffer_in_DWORD(acb, prbuffer);
> >>>>>>> + iop_data = (uint8_t __iomem *)prbuffer->data;
> >>>>>>> + iop_len = readl(&prbuffer->data_len);
> >>>>>>> + while (iop_len > 0) {
> >>>>>>> + pQbuffer = &acb->rqbuffer[acb->rqbuf_lastindex];
> >>>>>>> + *pQbuffer = readb(iop_data);
> >>>>>>> + acb->rqbuf_lastindex++;
> >>>>>>> + acb->rqbuf_lastindex %= ARCMSR_MAX_QBUFFER;
> >>>>>>> + iop_data++;
> >>>>>>> + iop_len--;
> >>>>>>> }
> >>>>>>> + arcmsr_iop_message_read(acb);
> >>>>>>> + return 1;
> >>>>>>> +}
> >>>>>>> +
> >>>>>>> +static void arcmsr_iop2drv_data_wrote_handle(struct AdapterControlBlock *acb)
> >>>>>>> +{
> >>>>>>> + unsigned long flags;
> >>>>>>> + struct QBUFFER __iomem *prbuffer;
> >>>>>>> + int32_t buf_empty_len;
> >>>>>>>
> >>>>>>> - else {
> >>>>>>> + spin_lock_irqsave(&acb->rqbuffer_lock, flags);
> >>>>>>> + prbuffer = arcmsr_get_iop_rqbuffer(acb);
> >>>>>>> + buf_empty_len = (acb->rqbuf_lastindex - acb->rqbuf_firstindex - 1) &
> >>>>>>> + (ARCMSR_MAX_QBUFFER - 1);
> >>>>>>> + if (buf_empty_len >= readl(&prbuffer->data_len)) {
> >>>>>>> + if (arcmsr_Read_iop_rqbuffer_data(acb, prbuffer) == 0)
> >>>>>>> + acb->acb_flags |= ACB_F_IOPDATA_OVERFLOW;
> >>>>>>> + } else
> >>>>>>> acb->acb_flags |= ACB_F_IOPDATA_OVERFLOW;
> >>>>>>> + spin_unlock_irqrestore(&acb->rqbuffer_lock, flags);
> >>>>>>> +}
> >>>>>>> +
> >>>>>>> +static void arcmsr_write_ioctldata2iop_in_DWORD(struct AdapterControlBlock *acb)
> >>>>>>> +{
> >>>>>>> + uint8_t *pQbuffer;
> >>>>>>> + struct QBUFFER __iomem *pwbuffer;
> >>>>>>> + uint8_t *buf1 = NULL;
> >>>>>>> + uint32_t __iomem *iop_data;
> >>>>>>> + uint32_t allxfer_len = 0, data_len, *buf2 = NULL, data;
> >>>>>>> +
> >>>>>>> + if (acb->acb_flags & ACB_F_MESSAGE_WQBUFFER_READED) {
> >>>>>>> + buf1 = kmalloc(128, GFP_ATOMIC);
> >>>>>>> + buf2 = (uint32_t *)buf1;
> >>>>>>> + if (buf1 == NULL)
> >>>>>>> + return;
> >>>>>>> +
> >>>>>>> + acb->acb_flags &= (~ACB_F_MESSAGE_WQBUFFER_READED);
> >>>>>>> + pwbuffer = arcmsr_get_iop_wqbuffer(acb);
> >>>>>>> + iop_data = (uint32_t __iomem *)pwbuffer->data;
> >>>>>>> + while ((acb->wqbuf_firstindex != acb->wqbuf_lastindex)
> >>>>>>> + && (allxfer_len < 124)) {
> >>>>>>> + pQbuffer = &acb->wqbuffer[acb->wqbuf_firstindex];
> >>>>>>> + *buf1 = *pQbuffer;
> >>>>>>> + acb->wqbuf_firstindex++;
> >>>>>>> + acb->wqbuf_firstindex %= ARCMSR_MAX_QBUFFER;
> >>>>>>> + buf1++;
> >>>>>>> + allxfer_len++;
> >>>>>>> + }
> >>>>>>> + data_len = allxfer_len;
> >>>>>>> + buf1 = (uint8_t *)buf2;
> >>>>>>> + while (data_len >= 4) {
> >>>>>>> + data = *buf2++;
> >>>>>>> + writel(data, iop_data);
> >>>>>>> + iop_data++;
> >>>>>>> + data_len -= 4;
> >>>>>>> + }
> >>>>>>> + if (data_len) {
> >>>>>>> + data = *buf2;
> >>>>>>> + writel(data, iop_data);
> >>>>>>> + }
> >>>>>>> + writel(allxfer_len, &pwbuffer->data_len);
> >>>>>>> + kfree(buf1);
> >>>>>>> + arcmsr_iop_message_wrote(acb);
> >>>>>>> }
> >>>>>>> }
> >>>>>>>
> >>>>>>> -static void arcmsr_iop2drv_data_read_handle(struct AdapterControlBlock *acb)
> >>>>>>> +void
> >>>>>>> +arcmsr_write_ioctldata2iop(struct AdapterControlBlock *acb)
> >>>>>>> {
> >>>>>>> - acb->acb_flags |= ACB_F_MESSAGE_WQBUFFER_READED;
> >>>>>>> - if (acb->wqbuf_firstindex != acb->wqbuf_lastindex) {
> >>>>>>> - uint8_t *pQbuffer;
> >>>>>>> - struct QBUFFER __iomem *pwbuffer;
> >>>>>>> - uint8_t __iomem *iop_data;
> >>>>>>> - int32_t allxfer_len = 0;
> >>>>>>> + uint8_t *pQbuffer;
> >>>>>>> + struct QBUFFER __iomem *pwbuffer;
> >>>>>>> + uint8_t __iomem *iop_data;
> >>>>>>> + int32_t allxfer_len = 0;
> >>>>>>>
> >>>>>>> + if (acb->adapter_type & ACB_ADAPTER_TYPE_C) {
> >>>>>>> + arcmsr_write_ioctldata2iop_in_DWORD(acb);
> >>>>>>> + return;
> >>>>>>> + }
> >>>>>>> + if (acb->acb_flags & ACB_F_MESSAGE_WQBUFFER_READED) {
> >>>>>>> acb->acb_flags &= (~ACB_F_MESSAGE_WQBUFFER_READED);
> >>>>>>> pwbuffer = arcmsr_get_iop_wqbuffer(acb);
> >>>>>>> iop_data = (uint8_t __iomem *)pwbuffer->data;
> >>>>>>> -
> >>>>>>> - while ((acb->wqbuf_firstindex != acb->wqbuf_lastindex) && \
> >>>>>>> - (allxfer_len < 124)) {
> >>>>>>> + while ((acb->wqbuf_firstindex != acb->wqbuf_lastindex)
> >>>>>>> + && (allxfer_len < 124)) {
> >>>>>>> pQbuffer = &acb->wqbuffer[acb->wqbuf_firstindex];
> >>>>>>> - memcpy(iop_data, pQbuffer, 1);
> >>>>>>> + writeb(*pQbuffer, iop_data);
> >>>>>>> acb->wqbuf_firstindex++;
> >>>>>>> acb->wqbuf_firstindex %= ARCMSR_MAX_QBUFFER;
> >>>>>>> iop_data++;
> >>>>>>> allxfer_len++;
> >>>>>>> }
> >>>>>>> - pwbuffer->data_len = allxfer_len;
> >>>>>>> -
> >>>>>>> + writel(allxfer_len, &pwbuffer->data_len);
> >>>>>>> arcmsr_iop_message_wrote(acb);
> >>>>>>> }
> >>>>>>> +}
> >>>>>>>
> >>>>>>> - if (acb->wqbuf_firstindex == acb->wqbuf_lastindex) {
> >>>>>>> +static void arcmsr_iop2drv_data_read_handle(struct AdapterControlBlock *acb)
> >>>>>>> +{
> >>>>>>> + unsigned long flags;
> >>>>>>> +
> >>>>>>> + spin_lock_irqsave(&acb->wqbuffer_lock, flags);
> >>>>>>> + acb->acb_flags |= ACB_F_MESSAGE_WQBUFFER_READED;
> >>>>>>> + if (acb->wqbuf_firstindex != acb->wqbuf_lastindex)
> >>>>>>> + arcmsr_write_ioctldata2iop(acb);
> >>>>>>> + if (acb->wqbuf_firstindex == acb->wqbuf_lastindex)
> >>>>>>> acb->acb_flags |= ACB_F_MESSAGE_WQBUFFER_CLEARED;
> >>>>>>> - }
> >>>>>>> + spin_unlock_irqrestore(&acb->wqbuffer_lock, flags);
> >>>>>>> }
> >>>>>>>
> >>>>>>> static void arcmsr_hbaA_doorbell_isr(struct AdapterControlBlock *acb)
> >>>>>>> @@ -1742,296 +1850,344 @@ static void arcmsr_iop_parking(struct Ad
> >>>>>>> }
> >>>>>>> }
> >>>>>>>
> >>>>>>> -void arcmsr_post_ioctldata2iop(struct AdapterControlBlock *acb)
> >>>>>>> +
> >>>>>>> +void arcmsr_clear_iop2drv_rqueue_buffer(struct AdapterControlBlock *acb)
> >>>>>>> {
> >>>>>>> - int32_t wqbuf_firstindex, wqbuf_lastindex;
> >>>>>>> - uint8_t *pQbuffer;
> >>>>>>> - struct QBUFFER __iomem *pwbuffer;
> >>>>>>> - uint8_t __iomem *iop_data;
> >>>>>>> - int32_t allxfer_len = 0;
> >>>>>>> - pwbuffer = arcmsr_get_iop_wqbuffer(acb);
> >>>>>>> - iop_data = (uint8_t __iomem *)pwbuffer->data;
> >>>>>>> - if (acb->acb_flags & ACB_F_MESSAGE_WQBUFFER_READED) {
> >>>>>>> - acb->acb_flags &= (~ACB_F_MESSAGE_WQBUFFER_READED);
> >>>>>>> - wqbuf_firstindex = acb->wqbuf_firstindex;
> >>>>>>> - wqbuf_lastindex = acb->wqbuf_lastindex;
> >>>>>>> - while ((wqbuf_firstindex != wqbuf_lastindex) && (allxfer_len < 124)) {
> >>>>>>> - pQbuffer = &acb->wqbuffer[wqbuf_firstindex];
> >>>>>>> - memcpy(iop_data, pQbuffer, 1);
> >>>>>>> - wqbuf_firstindex++;
> >>>>>>> - wqbuf_firstindex %= ARCMSR_MAX_QBUFFER;
> >>>>>>> - iop_data++;
> >>>>>>> - allxfer_len++;
> >>>>>>> + uint32_t i;
> >>>>>>> +
> >>>>>>> + if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
> >>>>>>> + for (i = 0; i < 15; i++) {
> >>>>>>> + if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
> >>>>>>> + acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
> >>>>>>> + acb->rqbuf_firstindex = 0;
> >>>>>>> + acb->rqbuf_lastindex = 0;
> >>>>>>> + arcmsr_iop_message_read(acb);
> >>>>>>> + mdelay(30);
> >>>>>>> + } else if (acb->rqbuf_firstindex != acb->rqbuf_lastindex) {
> >>>>>>> + acb->rqbuf_firstindex = 0;
> >>>>>>> + acb->rqbuf_lastindex = 0;
> >>>>>>> + mdelay(30);
> >>>>>>> + } else
> >>>>>>> + break;
> >>>>>>> }
> >>>>>>> - acb->wqbuf_firstindex = wqbuf_firstindex;
> >>>>>>> - pwbuffer->data_len = allxfer_len;
> >>>>>>> - arcmsr_iop_message_wrote(acb);
> >>>>>>> }
> >>>>>>> }
> >>>>>>>
> >>>>>>> -static int arcmsr_iop_message_xfer(struct AdapterControlBlock *acb,
> >>>>>>> - struct scsi_cmnd *cmd)
> >>>>>>> +static int arcmsr_iop_message_xfer(struct AdapterControlBlock *acb, struct scsi_cmnd *cmd)
> >>>>>>> {
> >>>>>>> - struct CMD_MESSAGE_FIELD *pcmdmessagefld;
> >>>>>>> - int retvalue = 0, transfer_len = 0;
> >>>>>>> char *buffer;
> >>>>>>> + unsigned short use_sg;
> >>>>>>> + int retvalue = 0, transfer_len = 0;
> >>>>>>> + unsigned long flags;
> >>>>>>> + struct CMD_MESSAGE_FIELD *pcmdmessagefld;
> >>>>>>> + uint32_t controlcode = (uint32_t)cmd->cmnd[5] << 24 |
> >>>>>>> + (uint32_t)cmd->cmnd[6] << 16 |
> >>>>>>> + (uint32_t)cmd->cmnd[7] << 8 |
> >>>>>>> + (uint32_t)cmd->cmnd[8];
> >>>>>>> struct scatterlist *sg;
> >>>>>>> - uint32_t controlcode = (uint32_t ) cmd->cmnd[5] << 24 |
> >>>>>>> - (uint32_t ) cmd->cmnd[6] << 16 |
> >>>>>>> - (uint32_t ) cmd->cmnd[7] << 8 |
> >>>>>>> - (uint32_t ) cmd->cmnd[8];
> >>>>>>> - /* 4 bytes: Areca io control code */
> >>>>>>> +
> >>>>>>> + use_sg = scsi_sg_count(cmd);
> >>>>>>> sg = scsi_sglist(cmd);
> >>>>>>> buffer = kmap_atomic(sg_page(sg)) + sg->offset;
> >>>>>>> - if (scsi_sg_count(cmd) > 1) {
> >>>>>>> + if (use_sg > 1) {
> >>>>>>> retvalue = ARCMSR_MESSAGE_FAIL;
> >>>>>>> goto message_out;
> >>>>>>> }
> >>>>>>> transfer_len += sg->length;
> >>>>>>> -
> >>>>>>> if (transfer_len > sizeof(struct CMD_MESSAGE_FIELD)) {
> >>>>>>> retvalue = ARCMSR_MESSAGE_FAIL;
> >>>>>>> + pr_info("%s: ARCMSR_MESSAGE_FAIL!\n", __func__);
> >>>>>>> goto message_out;
> >>>>>>> }
> >>>>>>> - pcmdmessagefld = (struct CMD_MESSAGE_FIELD *) buffer;
> >>>>>>> - switch(controlcode) {
> >>>>>>> -
> >>>>>>> + pcmdmessagefld = (struct CMD_MESSAGE_FIELD *)buffer;
> >>>>>>> + switch (controlcode) {
> >>>>>>> case ARCMSR_MESSAGE_READ_RQBUFFER: {
> >>>>>>> unsigned char *ver_addr;
> >>>>>>> uint8_t *pQbuffer, *ptmpQbuffer;
> >>>>>>> - int32_t allxfer_len = 0;
> >>>>>>> -
> >>>>>>> + uint32_t allxfer_len = 0;
> >>>>>>> ver_addr = kmalloc(1032, GFP_ATOMIC);
> >>>>>>> if (!ver_addr) {
> >>>>>>> retvalue = ARCMSR_MESSAGE_FAIL;
> >>>>>>> + pr_info("%s: memory not enough!\n", __func__);
> >>>>>>> goto message_out;
> >>>>>>> }
> >>>>>>> -
> >>>>>>> ptmpQbuffer = ver_addr;
> >>>>>>> - while ((acb->rqbuf_firstindex != acb->rqbuf_lastindex)
> >>>>>>> - && (allxfer_len < 1031)) {
> >>>>>>> + spin_lock_irqsave(&acb->rqbuffer_lock, flags);
> >>>>>>> + if (acb->rqbuf_firstindex != acb->rqbuf_lastindex) {
> >>>>>>> pQbuffer = &acb->rqbuffer[acb->rqbuf_firstindex];
> >>>>>>> - memcpy(ptmpQbuffer, pQbuffer, 1);
> >>>>>>> - acb->rqbuf_firstindex++;
> >>>>>>> - acb->rqbuf_firstindex %= ARCMSR_MAX_QBUFFER;
> >>>>>>> - ptmpQbuffer++;
> >>>>>>> - allxfer_len++;
> >>>>>>> + if (acb->rqbuf_firstindex > acb->rqbuf_lastindex) {
> >>>>>>> + if ((ARCMSR_MAX_QBUFFER -
> >>>>>>> + acb->rqbuf_firstindex) >= 1032) {
> >>>>>>> + memcpy(ptmpQbuffer, pQbuffer, 1032);
> >>>>>>> + acb->rqbuf_firstindex += 1032;
> >>>>>>> + acb->rqbuf_firstindex %= ARCMSR_MAX_QBUFFER;
> >>>>>>> + allxfer_len = 1032;
> >>>>>>> + } else {
> >>>>>>> + if (((ARCMSR_MAX_QBUFFER -
> >>>>>>> + acb->rqbuf_firstindex) +
> >>>>>>> + acb->rqbuf_lastindex) > 1032) {
> >>>>>>> + memcpy(ptmpQbuffer,
> >>>>>>> + pQbuffer, ARCMSR_MAX_QBUFFER
> >>>>>>> + - acb->rqbuf_firstindex);
> >>>>>>> + ptmpQbuffer +=
> >>>>>>> + ARCMSR_MAX_QBUFFER -
> >>>>>>> + acb->rqbuf_firstindex;
> >>>>>>> + memcpy(ptmpQbuffer,
> >>>>>>> + acb->rqbuffer, 1032 -
> >>>>>>> + (ARCMSR_MAX_QBUFFER
> >>>>>>> + - acb->rqbuf_firstindex));
> >>>>>>> + acb->rqbuf_firstindex =
> >>>>>>> + 1032 - (ARCMSR_MAX_QBUFFER
> >>>>>>> + - acb->rqbuf_firstindex);
> >>>>>>> + allxfer_len = 1032;
> >>>>>>> + } else {
> >>>>>>> + memcpy(ptmpQbuffer,
> >>>>>>> + pQbuffer, ARCMSR_MAX_QBUFFER
> >>>>>>> + - acb->rqbuf_firstindex);
> >>>>>>> + ptmpQbuffer +=
> >>>>>>> + ARCMSR_MAX_QBUFFER -
> >>>>>>> + acb->rqbuf_firstindex;
> >>>>>>> + memcpy(ptmpQbuffer,
> >>>>>>> + acb->rqbuffer,
> >>>>>>> + acb->rqbuf_lastindex);
> >>>>>>> + allxfer_len = ARCMSR_MAX_QBUFFER
> >>>>>>> + - acb->rqbuf_firstindex +
> >>>>>>> + acb->rqbuf_lastindex;
> >>>>>>> + acb->rqbuf_firstindex =
> >>>>>>> + acb->rqbuf_lastindex;
> >>>>>>> + }
> >>>>>>> + }
> >>>>>>> + } else {
> >>>>>>> + if ((acb->rqbuf_lastindex -
> >>>>>>> + acb->rqbuf_firstindex) > 1032) {
> >>>>>>> + memcpy(ptmpQbuffer, pQbuffer, 1032);
> >>>>>>> + acb->rqbuf_firstindex += 1032;
> >>>>>>> + allxfer_len = 1032;
> >>>>>>> + } else {
> >>>>>>> + memcpy(ptmpQbuffer, pQbuffer,
> >>>>>>> + acb->rqbuf_lastindex -
> >>>>>>> + acb->rqbuf_firstindex);
> >>>>>>> + allxfer_len = acb->rqbuf_lastindex
> >>>>>>> + - acb->rqbuf_firstindex;
> >>>>>>> + acb->rqbuf_firstindex =
> >>>>>>> + acb->rqbuf_lastindex;
> >>>>>>> + }
> >>>>>>> + }
> >>>>>>> }
> >>>>>>> + memcpy(pcmdmessagefld->messagedatabuffer, ver_addr,
> >>>>>>> + allxfer_len);
> >>>>>>> if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
> >>>>>>> -
> >>>>>>> struct QBUFFER __iomem *prbuffer;
> >>>>>>> - uint8_t __iomem *iop_data;
> >>>>>>> - int32_t iop_len;
> >>>>>>> -
> >>>>>>> acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
> >>>>>>> prbuffer = arcmsr_get_iop_rqbuffer(acb);
> >>>>>>> - iop_data = prbuffer->data;
> >>>>>>> - iop_len = readl(&prbuffer->data_len);
> >>>>>>> - while (iop_len > 0) {
> >>>>>>> - acb->rqbuffer[acb->rqbuf_lastindex] = readb(iop_data);
> >>>>>>> - acb->rqbuf_lastindex++;
> >>>>>>> - acb->rqbuf_lastindex %= ARCMSR_MAX_QBUFFER;
> >>>>>>> - iop_data++;
> >>>>>>> - iop_len--;
> >>>>>>> - }
> >>>>>>> - arcmsr_iop_message_read(acb);
> >>>>>>> - }
> >>>>>>> - memcpy(pcmdmessagefld->messagedatabuffer, ver_addr, allxfer_len);
> >>>>>>> - pcmdmessagefld->cmdmessage.Length = allxfer_len;
> >>>>>>> - if(acb->fw_flag == FW_DEADLOCK) {
> >>>>>>> - pcmdmessagefld->cmdmessage.ReturnCode = ARCMSR_MESSAGE_RETURNCODE_BUS_HANG_ON;
> >>>>>>> - }else{
> >>>>>>> - pcmdmessagefld->cmdmessage.ReturnCode = ARCMSR_MESSAGE_RETURNCODE_OK;
> >>>>>>> + if (arcmsr_Read_iop_rqbuffer_data(acb, prbuffer) == 0)
> >>>>>>> + acb->acb_flags |= ACB_F_IOPDATA_OVERFLOW;
> >>>>>>> }
> >>>>>>> + spin_unlock_irqrestore(&acb->rqbuffer_lock, flags);
> >>>>>>> kfree(ver_addr);
> >>>>>>> - }
> >>>>>>> + pcmdmessagefld->cmdmessage.Length = allxfer_len;
> >>>>>>> + if (acb->fw_flag == FW_DEADLOCK)
> >>>>>>> + pcmdmessagefld->cmdmessage.ReturnCode =
> >>>>>>> + ARCMSR_MESSAGE_RETURNCODE_BUS_HANG_ON;
> >>>>>>> + else
> >>>>>>> + pcmdmessagefld->cmdmessage.ReturnCode =
> >>>>>>> + ARCMSR_MESSAGE_RETURNCODE_OK;
> >>>>>>> break;
> >>>>>>> -
> >>>>>>> + }
> >>>>>>> case ARCMSR_MESSAGE_WRITE_WQBUFFER: {
> >>>>>>> unsigned char *ver_addr;
> >>>>>>> int32_t my_empty_len, user_len, wqbuf_firstindex, wqbuf_lastindex;
> >>>>>>> uint8_t *pQbuffer, *ptmpuserbuffer;
> >>>>>>> -
> >>>>>>> ver_addr = kmalloc(1032, GFP_ATOMIC);
> >>>>>>> if (!ver_addr) {
> >>>>>>> retvalue = ARCMSR_MESSAGE_FAIL;
> >>>>>>> goto message_out;
> >>>>>>> }
> >>>>>>> - if(acb->fw_flag == FW_DEADLOCK) {
> >>>>>>> - pcmdmessagefld->cmdmessage.ReturnCode =
> >>>>>>> - ARCMSR_MESSAGE_RETURNCODE_BUS_HANG_ON;
> >>>>>>> - }else{
> >>>>>>> - pcmdmessagefld->cmdmessage.ReturnCode =
> >>>>>>> - ARCMSR_MESSAGE_RETURNCODE_OK;
> >>>>>>> - }
> >>>>>>> ptmpuserbuffer = ver_addr;
> >>>>>>> user_len = pcmdmessagefld->cmdmessage.Length;
> >>>>>>> - memcpy(ptmpuserbuffer, pcmdmessagefld->messagedatabuffer, user_len);
> >>>>>>> + memcpy(ptmpuserbuffer,
> >>>>>>> + pcmdmessagefld->messagedatabuffer, user_len);
> >>>>>>> + spin_lock_irqsave(&acb->wqbuffer_lock, flags);
> >>>>>>> wqbuf_lastindex = acb->wqbuf_lastindex;
> >>>>>>> wqbuf_firstindex = acb->wqbuf_firstindex;
> >>>>>>> if (wqbuf_lastindex != wqbuf_firstindex) {
> >>>>>>> struct SENSE_DATA *sensebuffer =
> >>>>>>> (struct SENSE_DATA *)cmd->sense_buffer;
> >>>>>>> - arcmsr_post_ioctldata2iop(acb);
> >>>>>>> + arcmsr_write_ioctldata2iop(acb);
> >>>>>>> /* has error report sensedata */
> >>>>>>> - sensebuffer->ErrorCode = 0x70;
> >>>>>>> + sensebuffer->ErrorCode = SCSI_SENSE_CURRENT_ERRORS;
> >>>>>>> sensebuffer->SenseKey = ILLEGAL_REQUEST;
> >>>>>>> sensebuffer->AdditionalSenseLength = 0x0A;
> >>>>>>> sensebuffer->AdditionalSenseCode = 0x20;
> >>>>>>> sensebuffer->Valid = 1;
> >>>>>>> retvalue = ARCMSR_MESSAGE_FAIL;
> >>>>>>> } else {
> >>>>>>> - my_empty_len = (wqbuf_firstindex-wqbuf_lastindex - 1)
> >>>>>>> - &(ARCMSR_MAX_QBUFFER - 1);
> >>>>>>> + my_empty_len = (wqbuf_firstindex - wqbuf_lastindex - 1)
> >>>>>>> + & (ARCMSR_MAX_QBUFFER - 1);
> >>>>>>> if (my_empty_len >= user_len) {
> >>>>>>> while (user_len > 0) {
> >>>>>>> - pQbuffer =
> >>>>>>> - &acb->wqbuffer[acb->wqbuf_lastindex];
> >>>>>>> - memcpy(pQbuffer, ptmpuserbuffer, 1);
> >>>>>>> - acb->wqbuf_lastindex++;
> >>>>>>> - acb->wqbuf_lastindex %= ARCMSR_MAX_QBUFFER;
> >>>>>>> - ptmpuserbuffer++;
> >>>>>>> - user_len--;
> >>>>>>> + pQbuffer = &acb->wqbuffer[acb->wqbuf_lastindex];
> >>>>>>> + if ((acb->wqbuf_lastindex + user_len)
> >>>>>>> + > ARCMSR_MAX_QBUFFER) {
> >>>>>>> + memcpy(pQbuffer, ptmpuserbuffer,
> >>>>>>> + ARCMSR_MAX_QBUFFER -
> >>>>>>> + acb->wqbuf_lastindex);
> >>>>>>> + ptmpuserbuffer +=
> >>>>>>> + (ARCMSR_MAX_QBUFFER
> >>>>>>> + - acb->wqbuf_lastindex);
> >>>>>>> + user_len -= (ARCMSR_MAX_QBUFFER
> >>>>>>> + - acb->wqbuf_lastindex);
> >>>>>>> + acb->wqbuf_lastindex = 0;
> >>>>>>> + } else {
> >>>>>>> + memcpy(pQbuffer, ptmpuserbuffer,
> >>>>>>> + user_len);
> >>>>>>> + acb->wqbuf_lastindex += user_len;
> >>>>>>> + acb->wqbuf_lastindex %=
> >>>>>>> + ARCMSR_MAX_QBUFFER;
> >>>>>>> + user_len = 0;
> >>>>>>> + }
> >>>>>>> }
> >>>>>>> - if (acb->acb_flags & ACB_F_MESSAGE_WQBUFFER_CLEARED) {
> >>>>>>> + if (acb->acb_flags &
> >>>>>>> + ACB_F_MESSAGE_WQBUFFER_CLEARED) {
> >>>>>>> acb->acb_flags &=
> >>>>>>> ~ACB_F_MESSAGE_WQBUFFER_CLEARED;
> >>>>>>> - arcmsr_post_ioctldata2iop(acb);
> >>>>>>> + arcmsr_write_ioctldata2iop(acb);
> >>>>>>> }
> >>>>>>> } else {
> >>>>>>> - /* has error report sensedata */
> >>>>>>> struct SENSE_DATA *sensebuffer =
> >>>>>>> (struct SENSE_DATA *)cmd->sense_buffer;
> >>>>>>> - sensebuffer->ErrorCode = 0x70;
> >>>>>>> + /* has error report sensedata */
> >>>>>>> + sensebuffer->ErrorCode =
> >>>>>>> + SCSI_SENSE_CURRENT_ERRORS;
> >>>>>>> sensebuffer->SenseKey = ILLEGAL_REQUEST;
> >>>>>>> sensebuffer->AdditionalSenseLength = 0x0A;
> >>>>>>> sensebuffer->AdditionalSenseCode = 0x20;
> >>>>>>> sensebuffer->Valid = 1;
> >>>>>>> retvalue = ARCMSR_MESSAGE_FAIL;
> >>>>>>> }
> >>>>>>> - }
> >>>>>>> - kfree(ver_addr);
> >>>>>>> }
> >>>>>>> + spin_unlock_irqrestore(&acb->wqbuffer_lock, flags);
> >>>>>>> + kfree(ver_addr);
> >>>>>>> + if (acb->fw_flag == FW_DEADLOCK)
> >>>>>>> + pcmdmessagefld->cmdmessage.ReturnCode =
> >>>>>>> + ARCMSR_MESSAGE_RETURNCODE_BUS_HANG_ON;
> >>>>>>> + else
> >>>>>>> + pcmdmessagefld->cmdmessage.ReturnCode =
> >>>>>>> + ARCMSR_MESSAGE_RETURNCODE_OK;
> >>>>>>> break;
> >>>>>>> -
> >>>>>>> + }
> >>>>>>> case ARCMSR_MESSAGE_CLEAR_RQBUFFER: {
> >>>>>>> uint8_t *pQbuffer = acb->rqbuffer;
> >>>>>>> - if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
> >>>>>>> - acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
> >>>>>>> - arcmsr_iop_message_read(acb);
> >>>>>>> - }
> >>>>>>> +
> >>>>>>> + arcmsr_clear_iop2drv_rqueue_buffer(acb);
> >>>>>>> + spin_lock_irqsave(&acb->rqbuffer_lock, flags);
> >>>>>>> acb->acb_flags |= ACB_F_MESSAGE_RQBUFFER_CLEARED;
> >>>>>>> acb->rqbuf_firstindex = 0;
> >>>>>>> acb->rqbuf_lastindex = 0;
> >>>>>>> memset(pQbuffer, 0, ARCMSR_MAX_QBUFFER);
> >>>>>>> - if(acb->fw_flag == FW_DEADLOCK) {
> >>>>>>> + spin_unlock_irqrestore(&acb->rqbuffer_lock, flags);
> >>>>>>> + if (acb->fw_flag == FW_DEADLOCK)
> >>>>>>> pcmdmessagefld->cmdmessage.ReturnCode =
> >>>>>>> - ARCMSR_MESSAGE_RETURNCODE_BUS_HANG_ON;
> >>>>>>> - }else{
> >>>>>>> + ARCMSR_MESSAGE_RETURNCODE_BUS_HANG_ON;
> >>>>>>> + else
> >>>>>>> pcmdmessagefld->cmdmessage.ReturnCode =
> >>>>>>> - ARCMSR_MESSAGE_RETURNCODE_OK;
> >>>>>>> - }
> >>>>>>> - }
> >>>>>>> + ARCMSR_MESSAGE_RETURNCODE_OK;
> >>>>>>> break;
> >>>>>>> -
> >>>>>>> + }
> >>>>>>> case ARCMSR_MESSAGE_CLEAR_WQBUFFER: {
> >>>>>>> uint8_t *pQbuffer = acb->wqbuffer;
> >>>>>>> - if(acb->fw_flag == FW_DEADLOCK) {
> >>>>>>> - pcmdmessagefld->cmdmessage.ReturnCode =
> >>>>>>> - ARCMSR_MESSAGE_RETURNCODE_BUS_HANG_ON;
> >>>>>>> - }else{
> >>>>>>> - pcmdmessagefld->cmdmessage.ReturnCode =
> >>>>>>> - ARCMSR_MESSAGE_RETURNCODE_OK;
> >>>>>>> - }
> >>>>>>> -
> >>>>>>> - if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
> >>>>>>> - acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
> >>>>>>> - arcmsr_iop_message_read(acb);
> >>>>>>> - }
> >>>>>>> - acb->acb_flags |=
> >>>>>>> - (ACB_F_MESSAGE_WQBUFFER_CLEARED |
> >>>>>>> - ACB_F_MESSAGE_WQBUFFER_READED);
> >>>>>>> + spin_lock_irqsave(&acb->wqbuffer_lock, flags);
> >>>>>>> + acb->acb_flags |= (ACB_F_MESSAGE_WQBUFFER_CLEARED |
> >>>>>>> + ACB_F_MESSAGE_WQBUFFER_READED);
> >>>>>>> acb->wqbuf_firstindex = 0;
> >>>>>>> acb->wqbuf_lastindex = 0;
> >>>>>>> memset(pQbuffer, 0, ARCMSR_MAX_QBUFFER);
> >>>>>>> - }
> >>>>>>> + spin_unlock_irqrestore(&acb->wqbuffer_lock, flags);
> >>>>>>> + if (acb->fw_flag == FW_DEADLOCK)
> >>>>>>> + pcmdmessagefld->cmdmessage.ReturnCode =
> >>>>>>> + ARCMSR_MESSAGE_RETURNCODE_BUS_HANG_ON;
> >>>>>>> + else
> >>>>>>> + pcmdmessagefld->cmdmessage.ReturnCode =
> >>>>>>> + ARCMSR_MESSAGE_RETURNCODE_OK;
> >>>>>>> break;
> >>>>>>> -
> >>>>>>> + }
> >>>>>>> case ARCMSR_MESSAGE_CLEAR_ALLQBUFFER: {
> >>>>>>> uint8_t *pQbuffer;
> >>>>>>> -
> >>>>>>> - if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
> >>>>>>> - acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
> >>>>>>> - arcmsr_iop_message_read(acb);
> >>>>>>> - }
> >>>>>>> - acb->acb_flags |=
> >>>>>>> - (ACB_F_MESSAGE_WQBUFFER_CLEARED
> >>>>>>> - | ACB_F_MESSAGE_RQBUFFER_CLEARED
> >>>>>>> - | ACB_F_MESSAGE_WQBUFFER_READED);
> >>>>>>> + arcmsr_clear_iop2drv_rqueue_buffer(acb);
> >>>>>>> + spin_lock_irqsave(&acb->rqbuffer_lock, flags);
> >>>>>>> + acb->acb_flags |= ACB_F_MESSAGE_RQBUFFER_CLEARED;
> >>>>>>> acb->rqbuf_firstindex = 0;
> >>>>>>> acb->rqbuf_lastindex = 0;
> >>>>>>> - acb->wqbuf_firstindex = 0;
> >>>>>>> - acb->wqbuf_lastindex = 0;
> >>>>>>> pQbuffer = acb->rqbuffer;
> >>>>>>> memset(pQbuffer, 0, sizeof(struct QBUFFER));
> >>>>>>> + spin_unlock_irqrestore(&acb->rqbuffer_lock, flags);
> >>>>>>> + spin_lock_irqsave(&acb->wqbuffer_lock, flags);
> >>>>>>> + acb->acb_flags |= (ACB_F_MESSAGE_WQBUFFER_CLEARED |
> >>>>>>> + ACB_F_MESSAGE_WQBUFFER_READED);
> >>>>>>> + acb->wqbuf_firstindex = 0;
> >>>>>>> + acb->wqbuf_lastindex = 0;
> >>>>>>> pQbuffer = acb->wqbuffer;
> >>>>>>> memset(pQbuffer, 0, sizeof(struct QBUFFER));
> >>>>>>> - if(acb->fw_flag == FW_DEADLOCK) {
> >>>>>>> + spin_unlock_irqrestore(&acb->wqbuffer_lock, flags);
> >>>>>>> + if (acb->fw_flag == FW_DEADLOCK)
> >>>>>>> pcmdmessagefld->cmdmessage.ReturnCode =
> >>>>>>> - ARCMSR_MESSAGE_RETURNCODE_BUS_HANG_ON;
> >>>>>>> - }else{
> >>>>>>> + ARCMSR_MESSAGE_RETURNCODE_BUS_HANG_ON;
> >>>>>>> + else
> >>>>>>> pcmdmessagefld->cmdmessage.ReturnCode =
> >>>>>>> - ARCMSR_MESSAGE_RETURNCODE_OK;
> >>>>>>> - }
> >>>>>>> - }
> >>>>>>> + ARCMSR_MESSAGE_RETURNCODE_OK;
> >>>>>>> break;
> >>>>>>> -
> >>>>>>> + }
> >>>>>>> case ARCMSR_MESSAGE_RETURN_CODE_3F: {
> >>>>>>> - if(acb->fw_flag == FW_DEADLOCK) {
> >>>>>>> + if (acb->fw_flag == FW_DEADLOCK)
> >>>>>>> pcmdmessagefld->cmdmessage.ReturnCode =
> >>>>>>> - ARCMSR_MESSAGE_RETURNCODE_BUS_HANG_ON;
> >>>>>>> - }else{
> >>>>>>> + ARCMSR_MESSAGE_RETURNCODE_BUS_HANG_ON;
> >>>>>>> + else
> >>>>>>> pcmdmessagefld->cmdmessage.ReturnCode =
> >>>>>>> - ARCMSR_MESSAGE_RETURNCODE_3F;
> >>>>>>> - }
> >>>>>>> + ARCMSR_MESSAGE_RETURNCODE_3F;
> >>>>>>> break;
> >>>>>>> - }
> >>>>>>> + }
> >>>>>>> case ARCMSR_MESSAGE_SAY_HELLO: {
> >>>>>>> int8_t *hello_string = "Hello! I am ARCMSR";
> >>>>>>> - if(acb->fw_flag == FW_DEADLOCK) {
> >>>>>>> + if (acb->fw_flag == FW_DEADLOCK)
> >>>>>>> pcmdmessagefld->cmdmessage.ReturnCode =
> >>>>>>> - ARCMSR_MESSAGE_RETURNCODE_BUS_HANG_ON;
> >>>>>>> - }else{
> >>>>>>> + ARCMSR_MESSAGE_RETURNCODE_BUS_HANG_ON;
> >>>>>>> + else
> >>>>>>> pcmdmessagefld->cmdmessage.ReturnCode =
> >>>>>>> - ARCMSR_MESSAGE_RETURNCODE_OK;
> >>>>>>> - }
> >>>>>>> - memcpy(pcmdmessagefld->messagedatabuffer, hello_string
> >>>>>>> - , (int16_t)strlen(hello_string));
> >>>>>>> - }
> >>>>>>> + ARCMSR_MESSAGE_RETURNCODE_OK;
> >>>>>>> + memcpy(pcmdmessagefld->messagedatabuffer,
> >>>>>>> + hello_string, (int16_t)strlen(hello_string));
> >>>>>>> break;
> >>>>>>> -
> >>>>>>> - case ARCMSR_MESSAGE_SAY_GOODBYE:
> >>>>>>> - if(acb->fw_flag == FW_DEADLOCK) {
> >>>>>>> + }
> >>>>>>> + case ARCMSR_MESSAGE_SAY_GOODBYE: {
> >>>>>>> + if (acb->fw_flag == FW_DEADLOCK)
> >>>>>>> pcmdmessagefld->cmdmessage.ReturnCode =
> >>>>>>> - ARCMSR_MESSAGE_RETURNCODE_BUS_HANG_ON;
> >>>>>>> - }
> >>>>>>> + ARCMSR_MESSAGE_RETURNCODE_BUS_HANG_ON;
> >>>>>>> + else
> >>>>>>> + pcmdmessagefld->cmdmessage.ReturnCode =
> >>>>>>> + ARCMSR_MESSAGE_RETURNCODE_OK;
> >>>>>>> arcmsr_iop_parking(acb);
> >>>>>>> break;
> >>>>>>> -
> >>>>>>> - case ARCMSR_MESSAGE_FLUSH_ADAPTER_CACHE:
> >>>>>>> - if(acb->fw_flag == FW_DEADLOCK) {
> >>>>>>> + }
> >>>>>>> + case ARCMSR_MESSAGE_FLUSH_ADAPTER_CACHE: {
> >>>>>>> + if (acb->fw_flag == FW_DEADLOCK)
> >>>>>>> pcmdmessagefld->cmdmessage.ReturnCode =
> >>>>>>> - ARCMSR_MESSAGE_RETURNCODE_BUS_HANG_ON;
> >>>>>>> - }
> >>>>>>> + ARCMSR_MESSAGE_RETURNCODE_BUS_HANG_ON;
> >>>>>>> + else
> >>>>>>> + pcmdmessagefld->cmdmessage.ReturnCode =
> >>>>>>> + ARCMSR_MESSAGE_RETURNCODE_OK;
> >>>>>>> arcmsr_flush_adapter_cache(acb);
> >>>>>>> break;
> >>>>>>> -
> >>>>>>> + }
> >>>>>>> default:
> >>>>>>> retvalue = ARCMSR_MESSAGE_FAIL;
> >>>>>>> + pr_info("%s: unknown controlcode!\n", __func__);
> >>>>>>> + }
> >>>>>>> +message_out:
> >>>>>>> + if (use_sg) {
> >>>>>>> + struct scatterlist *sg;
> >>>>>>> + sg = scsi_sglist(cmd);
> >>>>>>> + kunmap_atomic(buffer - sg->offset);
> >>>>>>> }
> >>>>>>> - message_out:
> >>>>>>> - sg = scsi_sglist(cmd);
> >>>>>>> - kunmap_atomic(buffer - sg->offset);
> >>>>>>> return retvalue;
> >>>>>>> }
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>> --
> >>>>>>> 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
> >>>>> This patch is relative to branch:
> >>>>>
> >>>>> git://git.infradead.org/users/hch/scsi-queue.git arcmsr-for-3.18
> >>>>>
> >>>>> change log:
> >>>>> 1. rename rqbuf_firstindex to rqbuf_getIndex, rqbuf_lastindex to
> >>>>> rqbuf_putIndex.
> >>>>> 2. rename wqbuf_firstindex to wqbuf_getIndex, wqbuf_lastindex to
> >>>>> wqbuf_putIndex.
> >>>>> 3. replace 1032 by define ARCMSR_API_DATA_BUFLEN
> >>>>> 4. remove a NULL pointer checking before kfree.
> >>>>>
> >>>>> Signed-off-by: Ching Huang <ching2048@xxxxxxxxxxxx>
> >>>>> ---
> >>>>>
> >>>>> diff -uprN a/drivers/scsi/arcmsr/arcmsr_attr.c b/drivers/scsi/arcmsr/arcmsr_attr.c
> >>>>> --- a/drivers/scsi/arcmsr/arcmsr_attr.c 2014-08-21 12:14:27.000000000 +0800
> >>>>> +++ b/drivers/scsi/arcmsr/arcmsr_attr.c 2014-08-25 17:24:54.000000000 +0800
> >>>>> @@ -78,55 +78,55 @@ static ssize_t arcmsr_sysfs_iop_message_
> >>>>> /* do message unit read. */
> >>>>> ptmpQbuffer = (uint8_t *)buf;
> >>>>> spin_lock_irqsave(&acb->rqbuffer_lock, flags);
> >>>>> - if (acb->rqbuf_firstindex != acb->rqbuf_lastindex) {
> >>>>> - pQbuffer = &acb->rqbuffer[acb->rqbuf_firstindex];
> >>>>> - if (acb->rqbuf_firstindex > acb->rqbuf_lastindex) {
> >>>>> - if ((ARCMSR_MAX_QBUFFER - acb->rqbuf_firstindex) >= 1032) {
> >>>>> - memcpy(ptmpQbuffer, pQbuffer, 1032);
> >>>>> - acb->rqbuf_firstindex += 1032;
> >>>>> - acb->rqbuf_firstindex %= ARCMSR_MAX_QBUFFER;
> >>>>> - allxfer_len = 1032;
> >>>>> + if (acb->rqbuf_getIndex != acb->rqbuf_putIndex) {
> >>>>> + pQbuffer = &acb->rqbuffer[acb->rqbuf_getIndex];
> >>>>> + if (acb->rqbuf_getIndex > acb->rqbuf_putIndex) {
> >>>>> + if ((ARCMSR_MAX_QBUFFER - acb->rqbuf_getIndex) >= ARCMSR_API_DATA_BUFLEN) {
> >>>>> + memcpy(ptmpQbuffer, pQbuffer, ARCMSR_API_DATA_BUFLEN);
> >>>>> + acb->rqbuf_getIndex += ARCMSR_API_DATA_BUFLEN;
> >>>>> + acb->rqbuf_getIndex %= ARCMSR_MAX_QBUFFER;
> >>>>> + allxfer_len = ARCMSR_API_DATA_BUFLEN;
> >>>>> } else {
> >>>>> - if (((ARCMSR_MAX_QBUFFER - acb->rqbuf_firstindex)
> >>>>> - + acb->rqbuf_lastindex) > 1032) {
> >>>>> + if (((ARCMSR_MAX_QBUFFER - acb->rqbuf_getIndex)
> >>>>> + + acb->rqbuf_putIndex) > ARCMSR_API_DATA_BUFLEN) {
> >>>>> memcpy(ptmpQbuffer, pQbuffer,
> >>>>> ARCMSR_MAX_QBUFFER
> >>>>> - - acb->rqbuf_firstindex);
> >>>>> + - acb->rqbuf_getIndex);
> >>>>> ptmpQbuffer += ARCMSR_MAX_QBUFFER
> >>>>> - - acb->rqbuf_firstindex;
> >>>>> - memcpy(ptmpQbuffer, acb->rqbuffer, 1032
> >>>>> + - acb->rqbuf_getIndex;
> >>>>> + memcpy(ptmpQbuffer, acb->rqbuffer, ARCMSR_API_DATA_BUFLEN
> >>>>> - (ARCMSR_MAX_QBUFFER -
> >>>>> - acb->rqbuf_firstindex));
> >>>>> - acb->rqbuf_firstindex = 1032 -
> >>>>> + acb->rqbuf_getIndex));
> >>>>> + acb->rqbuf_getIndex = ARCMSR_API_DATA_BUFLEN -
> >>>>> (ARCMSR_MAX_QBUFFER -
> >>>>> - acb->rqbuf_firstindex);
> >>>>> - allxfer_len = 1032;
> >>>>> + acb->rqbuf_getIndex);
> >>>>> + allxfer_len = ARCMSR_API_DATA_BUFLEN;
> >>>>> } else {
> >>>>> memcpy(ptmpQbuffer, pQbuffer,
> >>>>> ARCMSR_MAX_QBUFFER -
> >>>>> - acb->rqbuf_firstindex);
> >>>>> + acb->rqbuf_getIndex);
> >>>>> ptmpQbuffer += ARCMSR_MAX_QBUFFER -
> >>>>> - acb->rqbuf_firstindex;
> >>>>> + acb->rqbuf_getIndex;
> >>>>> memcpy(ptmpQbuffer, acb->rqbuffer,
> >>>>> - acb->rqbuf_lastindex);
> >>>>> + acb->rqbuf_putIndex);
> >>>>> allxfer_len = ARCMSR_MAX_QBUFFER -
> >>>>> - acb->rqbuf_firstindex +
> >>>>> - acb->rqbuf_lastindex;
> >>>>> - acb->rqbuf_firstindex =
> >>>>> - acb->rqbuf_lastindex;
> >>>>> + acb->rqbuf_getIndex +
> >>>>> + acb->rqbuf_putIndex;
> >>>>> + acb->rqbuf_getIndex =
> >>>>> + acb->rqbuf_putIndex;
> >>>>> }
> >>>>> }
> >>>>> } else {
> >>>>> - if ((acb->rqbuf_lastindex - acb->rqbuf_firstindex) > 1032) {
> >>>>> - memcpy(ptmpQbuffer, pQbuffer, 1032);
> >>>>> - acb->rqbuf_firstindex += 1032;
> >>>>> - allxfer_len = 1032;
> >>>>> + if ((acb->rqbuf_putIndex - acb->rqbuf_getIndex) > ARCMSR_API_DATA_BUFLEN) {
> >>>>> + memcpy(ptmpQbuffer, pQbuffer, ARCMSR_API_DATA_BUFLEN);
> >>>>> + acb->rqbuf_getIndex += ARCMSR_API_DATA_BUFLEN;
> >>>>> + allxfer_len = ARCMSR_API_DATA_BUFLEN;
> >>>>> } else {
> >>>>> - memcpy(ptmpQbuffer, pQbuffer, acb->rqbuf_lastindex
> >>>>> - - acb->rqbuf_firstindex);
> >>>>> - allxfer_len = acb->rqbuf_lastindex -
> >>>>> - acb->rqbuf_firstindex;
> >>>>> - acb->rqbuf_firstindex = acb->rqbuf_lastindex;
> >>>>> + memcpy(ptmpQbuffer, pQbuffer, acb->rqbuf_putIndex
> >>>>> + - acb->rqbuf_getIndex);
> >>>>> + allxfer_len = acb->rqbuf_putIndex -
> >>>>> + acb->rqbuf_getIndex;
> >>>>> + acb->rqbuf_getIndex = acb->rqbuf_putIndex;
> >>>>> }
> >>>>> }
- if (acb->rqbuf_firstindex != acb->rqbuf_lastindex) {
- pQbuffer = &acb->rqbuffer[acb->rqbuf_firstindex];
- if (acb->rqbuf_firstindex > acb->rqbuf_lastindex) {
- if ((ARCMSR_MAX_QBUFFER - acb->rqbuf_firstindex) >= 1032) {
- memcpy(ptmpQbuffer, pQbuffer, 1032);
- acb->rqbuf_firstindex += 1032;
- acb->rqbuf_firstindex %= ARCMSR_MAX_QBUFFER;
- allxfer_len = 1032;
- } else {
- if (((ARCMSR_MAX_QBUFFER - acb->rqbuf_firstindex)
- + acb->rqbuf_lastindex) > 1032) {
- memcpy(ptmpQbuffer, pQbuffer,
- ARCMSR_MAX_QBUFFER
- - acb->rqbuf_firstindex);
- ptmpQbuffer += ARCMSR_MAX_QBUFFER
- - acb->rqbuf_firstindex;
- memcpy(ptmpQbuffer, acb->rqbuffer, 1032
- - (ARCMSR_MAX_QBUFFER -
- acb->rqbuf_firstindex));
- acb->rqbuf_firstindex = 1032 -
- (ARCMSR_MAX_QBUFFER -
- acb->rqbuf_firstindex);
- allxfer_len = 1032;
- } else {
- memcpy(ptmpQbuffer, pQbuffer,
- ARCMSR_MAX_QBUFFER -
- acb->rqbuf_firstindex);
- ptmpQbuffer += ARCMSR_MAX_QBUFFER -
- acb->rqbuf_firstindex;
- memcpy(ptmpQbuffer, acb->rqbuffer,
- acb->rqbuf_lastindex);
- allxfer_len = ARCMSR_MAX_QBUFFER -
- acb->rqbuf_firstindex +
- acb->rqbuf_lastindex;
- acb->rqbuf_firstindex =
- acb->rqbuf_lastindex;
- }
- }
- } else {
- if ((acb->rqbuf_lastindex - acb->rqbuf_firstindex) > 1032) {
- memcpy(ptmpQbuffer, pQbuffer, 1032);
- acb->rqbuf_firstindex += 1032;
- allxfer_len = 1032;
- } else {
- memcpy(ptmpQbuffer, pQbuffer, acb->rqbuf_lastindex
- - acb->rqbuf_firstindex);
- allxfer_len = acb->rqbuf_lastindex -
- acb->rqbuf_firstindex;
- acb->rqbuf_firstindex = acb->rqbuf_lastindex;
- }
+ if (acb->rqbuf_getIndex != acb->rqbuf_putIndex) {
+ unsigned int tail = acb->rqbuf_getIndex;
+ unsigned int head = acb->rqbuf_putIndex;
+ unsigned int cnt_to_end = CIRC_CNT_TO_END(head, tail, ARCMSR_MAX_QBUFFER);
+
+ allxfer_len = CIRC_CNT(head, tail, ARCMSR_MAX_QBUFFER);
+ if (allxfer_len > ARCMSR_API_DATA_BUFLEN)
+ allxfer_len = ARCMSR_API_DATA_BUFLEN;
+
+ if (allxfer_len <= cnt_to_end)
+ memcpy(ptmpQbuffer, acb->rqbuffer + tail, allxfer_len);
+ else {
+ memcpy(ptmpQbuffer, acb->rqbuffer + tail, cnt_to_end);
+ memcpy(ptmpQbuffer + cnt_to_end, acb->rqbuffer, allxfer_len - cnt_to_end);
}
+ acb->rqbuf_getIndex = (acb->rqbuf_getIndex + allxfer_len) % ARCMSR_MAX_QBUFFER;
> >>>>> }
> >>>>> @@ -150,33 +150,33 @@ static ssize_t arcmsr_sysfs_iop_message_
> >>>>> struct device *dev = container_of(kobj,struct device,kobj);
> >>>>> struct Scsi_Host *host = class_to_shost(dev);
> >>>>> struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
> >>>>> - int32_t my_empty_len, user_len, wqbuf_firstindex, wqbuf_lastindex;
> >>>>> + int32_t my_empty_len, user_len, wqbuf_getIndex, wqbuf_putIndex;
> >>>>> uint8_t *pQbuffer, *ptmpuserbuffer;
> >>>>> unsigned long flags;
> >>>>>
> >>>>> if (!capable(CAP_SYS_ADMIN))
> >>>>> return -EACCES;
> >>>>> - if (count > 1032)
> >>>>> + if (count > ARCMSR_API_DATA_BUFLEN)
> >>>>> return -EINVAL;
> >>>>> /* do message unit write. */
> >>>>> ptmpuserbuffer = (uint8_t *)buf;
> >>>>> user_len = (int32_t)count;
> >>>>> spin_lock_irqsave(&acb->wqbuffer_lock, flags);
> >>>>> - wqbuf_lastindex = acb->wqbuf_lastindex;
> >>>>> - wqbuf_firstindex = acb->wqbuf_firstindex;
> >>>>> - if (wqbuf_lastindex != wqbuf_firstindex) {
> >>>>> + wqbuf_putIndex = acb->wqbuf_putIndex;
> >>>>> + wqbuf_getIndex = acb->wqbuf_getIndex;
> >>>>> + if (wqbuf_putIndex != wqbuf_getIndex) {
> >>>>> arcmsr_write_ioctldata2iop(acb);
> >>>>> spin_unlock_irqrestore(&acb->wqbuffer_lock, flags);
> >>>>> return 0; /*need retry*/
> >>>>> } else {
> >>>>> - my_empty_len = (wqbuf_firstindex-wqbuf_lastindex - 1)
> >>>>> + my_empty_len = (wqbuf_getIndex-wqbuf_putIndex - 1)
> >>>>> &(ARCMSR_MAX_QBUFFER - 1);
> >>>>> if (my_empty_len >= user_len) {
> >>>>> while (user_len > 0) {
> >>>>> - pQbuffer = &acb->wqbuffer[acb->wqbuf_lastindex];
> >>>>> + pQbuffer = &acb->wqbuffer[acb->wqbuf_putIndex];
> >>>>> memcpy(pQbuffer, ptmpuserbuffer, 1);
> >>>>> - acb->wqbuf_lastindex++;
> >>>>> - acb->wqbuf_lastindex %= ARCMSR_MAX_QBUFFER;
> >>>>> + acb->wqbuf_putIndex++;
> >>>>> + acb->wqbuf_putIndex %= ARCMSR_MAX_QBUFFER;
> >>>>> ptmpuserbuffer++;
> >>>>> user_len--;
> >>>>> }
> >>>>> @@ -215,12 +215,12 @@ static ssize_t arcmsr_sysfs_iop_message_
> >>>>> | ACB_F_MESSAGE_RQBUFFER_CLEARED
> >>>>> | ACB_F_MESSAGE_WQBUFFER_READED);
> >>>>> spin_lock_irqsave(&acb->rqbuffer_lock, flags);
> >>>>> - acb->rqbuf_firstindex = 0;
> >>>>> - acb->rqbuf_lastindex = 0;
> >>>>> + acb->rqbuf_getIndex = 0;
> >>>>> + acb->rqbuf_putIndex = 0;
> >>>>> spin_unlock_irqrestore(&acb->rqbuffer_lock, flags);
> >>>>> spin_lock_irqsave(&acb->wqbuffer_lock, flags);
> >>>>> - acb->wqbuf_firstindex = 0;
> >>>>> - acb->wqbuf_lastindex = 0;
> >>>>> + acb->wqbuf_getIndex = 0;
> >>>>> + acb->wqbuf_putIndex = 0;
> >>>>> spin_unlock_irqrestore(&acb->wqbuffer_lock, flags);
> >>>>> pQbuffer = acb->rqbuffer;
> >>>>> memset(pQbuffer, 0, sizeof (struct QBUFFER));
> >>>>> @@ -234,7 +234,7 @@ static struct bin_attribute arcmsr_sysfs
> >>>>> .name = "mu_read",
> >>>>> .mode = S_IRUSR ,
> >>>>> },
> >>>>> - .size = 1032,
> >>>>> + .size = ARCMSR_API_DATA_BUFLEN,
> >>>>> .read = arcmsr_sysfs_iop_message_read,
> >>>>> };
> >>>>>
> >>>>> @@ -243,7 +243,7 @@ static struct bin_attribute arcmsr_sysfs
> >>>>> .name = "mu_write",
> >>>>> .mode = S_IWUSR,
> >>>>> },
> >>>>> - .size = 1032,
> >>>>> + .size = ARCMSR_API_DATA_BUFLEN,
> >>>>> .write = arcmsr_sysfs_iop_message_write,
> >>>>> };
> >>>>>
> >>>>> diff -uprN a/drivers/scsi/arcmsr/arcmsr.h b/drivers/scsi/arcmsr/arcmsr.h
> >>>>> --- a/drivers/scsi/arcmsr/arcmsr.h 2014-08-21 12:14:27.000000000 +0800
> >>>>> +++ b/drivers/scsi/arcmsr/arcmsr.h 2014-08-25 17:25:20.000000000 +0800
> >>>>> @@ -107,10 +107,11 @@ struct CMD_MESSAGE
> >>>>> ** IOP Message Transfer Data for user space
> >>>>> *******************************************************************************
> >>>>> */
> >>>>> +#define ARCMSR_API_DATA_BUFLEN 1032
> >>>>> struct CMD_MESSAGE_FIELD
> >>>>> {
> >>>>> struct CMD_MESSAGE cmdmessage;
> >>>>> - uint8_t messagedatabuffer[1032];
> >>>>> + uint8_t messagedatabuffer[ARCMSR_API_DATA_BUFLEN];
> >>>>> };
> >>>>> /* IOP message transfer */
> >>>>> #define ARCMSR_MESSAGE_FAIL 0x0001
> >>>>> @@ -678,15 +679,15 @@ struct AdapterControlBlock
> >>>>> unsigned int uncache_size;
> >>>>> uint8_t rqbuffer[ARCMSR_MAX_QBUFFER];
> >>>>> /* data collection buffer for read from 80331 */
> >>>>> - int32_t rqbuf_firstindex;
> >>>>> + int32_t rqbuf_getIndex;
> >>>>> /* first of read buffer */
> >>>>> - int32_t rqbuf_lastindex;
> >>>>> + int32_t rqbuf_putIndex;
> >>>>> /* last of read buffer */
> >>>>> uint8_t wqbuffer[ARCMSR_MAX_QBUFFER];
> >>>>> /* data collection buffer for write to 80331 */
> >>>>> - int32_t wqbuf_firstindex;
> >>>>> + int32_t wqbuf_getIndex;
> >>>>> /* first of write buffer */
> >>>>> - int32_t wqbuf_lastindex;
> >>>>> + int32_t wqbuf_putIndex;
> >>>>> /* last of write buffer */
> >>>>> uint8_t devstate[ARCMSR_MAX_TARGETID][ARCMSR_MAX_TARGETLUN];
> >>>>> /* id0 ..... id15, lun0...lun7 */
> >>>>> diff -uprN a/drivers/scsi/arcmsr/arcmsr_hba.c b/drivers/scsi/arcmsr/arcmsr_hba.c
> >>>>> --- a/drivers/scsi/arcmsr/arcmsr_hba.c 2014-08-21 12:14:27.000000000 +0800
> >>>>> +++ b/drivers/scsi/arcmsr/arcmsr_hba.c 2014-08-25 17:25:14.000000000 +0800
> >>>>> @@ -1724,16 +1724,15 @@ arcmsr_Read_iop_rqbuffer_in_DWORD(struct
> >>>>> buf2 = (uint32_t *)buf1;
> >>>>> }
> >>>>> while (iop_len > 0) {
> >>>>> - pQbuffer = &acb->rqbuffer[acb->rqbuf_lastindex];
> >>>>> + pQbuffer = &acb->rqbuffer[acb->rqbuf_putIndex];
> >>>>> *pQbuffer = *buf1;
> >>>>> - acb->rqbuf_lastindex++;
> >>>>> + acb->rqbuf_putIndex++;
> >>>>> /* if last, index number set it to 0 */
> >>>>> - acb->rqbuf_lastindex %= ARCMSR_MAX_QBUFFER;
> >>>>> + acb->rqbuf_putIndex %= ARCMSR_MAX_QBUFFER;
> >>>>> buf1++;
> >>>>> iop_len--;
> >>>>> }
> >>>>> - if (buf2)
> >>>>> - kfree(buf2);
> >>>>> + kfree(buf2);
> >>>>> /* let IOP know data has been read */
> >>>>> arcmsr_iop_message_read(acb);
> >>>>> return 1;
> >>>>> @@ -1752,10 +1751,10 @@ arcmsr_Read_iop_rqbuffer_data(struct Ada
> >>>>> iop_data = (uint8_t __iomem *)prbuffer->data;
> >>>>> iop_len = readl(&prbuffer->data_len);
> >>>>> while (iop_len > 0) {
> >>>>> - pQbuffer = &acb->rqbuffer[acb->rqbuf_lastindex];
> >>>>> + pQbuffer = &acb->rqbuffer[acb->rqbuf_putIndex];
> >>>>> *pQbuffer = readb(iop_data);
> >>>>> - acb->rqbuf_lastindex++;
> >>>>> - acb->rqbuf_lastindex %= ARCMSR_MAX_QBUFFER;
> >>>>> + acb->rqbuf_putIndex++;
> >>>>> + acb->rqbuf_putIndex %= ARCMSR_MAX_QBUFFER;
> >>>>> iop_data++;
> >>>>> iop_len--;
> >>>>> }
> >>>>> @@ -1771,7 +1770,7 @@ static void arcmsr_iop2drv_data_wrote_ha
> >>>>>
> >>>>> spin_lock_irqsave(&acb->rqbuffer_lock, flags);
> >>>>> prbuffer = arcmsr_get_iop_rqbuffer(acb);
> >>>>> - buf_empty_len = (acb->rqbuf_lastindex - acb->rqbuf_firstindex - 1) &
> >>>>> + buf_empty_len = (acb->rqbuf_putIndex - acb->rqbuf_getIndex - 1) &
> >>>>> (ARCMSR_MAX_QBUFFER - 1);
> >>>>> if (buf_empty_len >= readl(&prbuffer->data_len)) {
> >>>>> if (arcmsr_Read_iop_rqbuffer_data(acb, prbuffer) == 0)
> >>>>> @@ -1798,12 +1797,12 @@ static void arcmsr_write_ioctldata2iop_i
> >>>>> acb->acb_flags &= (~ACB_F_MESSAGE_WQBUFFER_READED);
> >>>>> pwbuffer = arcmsr_get_iop_wqbuffer(acb);
> >>>>> iop_data = (uint32_t __iomem *)pwbuffer->data;
> >>>>> - while ((acb->wqbuf_firstindex != acb->wqbuf_lastindex)
> >>>>> + while ((acb->wqbuf_getIndex != acb->wqbuf_putIndex)
> >>>>> && (allxfer_len < 124)) {
> >>>>> - pQbuffer = &acb->wqbuffer[acb->wqbuf_firstindex];
> >>>>> + pQbuffer = &acb->wqbuffer[acb->wqbuf_getIndex];
> >>>>> *buf1 = *pQbuffer;
> >>>>> - acb->wqbuf_firstindex++;
> >>>>> - acb->wqbuf_firstindex %= ARCMSR_MAX_QBUFFER;
> >>>>> + acb->wqbuf_getIndex++;
> >>>>> + acb->wqbuf_getIndex %= ARCMSR_MAX_QBUFFER;
> >>>>> buf1++;
> >>>>> allxfer_len++;
> >>>>> }
> >>>>> @@ -1841,12 +1840,12 @@ arcmsr_write_ioctldata2iop(struct Adapte
> >>>>> acb->acb_flags &= (~ACB_F_MESSAGE_WQBUFFER_READED);
> >>>>> pwbuffer = arcmsr_get_iop_wqbuffer(acb);
> >>>>> iop_data = (uint8_t __iomem *)pwbuffer->data;
> >>>>> - while ((acb->wqbuf_firstindex != acb->wqbuf_lastindex)
> >>>>> + while ((acb->wqbuf_getIndex != acb->wqbuf_putIndex)
> >>>>> && (allxfer_len < 124)) {
> >>>>> - pQbuffer = &acb->wqbuffer[acb->wqbuf_firstindex];
> >>>>> + pQbuffer = &acb->wqbuffer[acb->wqbuf_getIndex];
> >>>>> writeb(*pQbuffer, iop_data);
> >>>>> - acb->wqbuf_firstindex++;
> >>>>> - acb->wqbuf_firstindex %= ARCMSR_MAX_QBUFFER;
> >>>>> + acb->wqbuf_getIndex++;
> >>>>> + acb->wqbuf_getIndex %= ARCMSR_MAX_QBUFFER;
> >>>>> iop_data++;
> >>>>> allxfer_len++;
> >>>>> }
> >>>>> @@ -1861,9 +1860,9 @@ static void arcmsr_iop2drv_data_read_han
> >>>>>
> >>>>> spin_lock_irqsave(&acb->wqbuffer_lock, flags);
> >>>>> acb->acb_flags |= ACB_F_MESSAGE_WQBUFFER_READED;
> >>>>> - if (acb->wqbuf_firstindex != acb->wqbuf_lastindex)
> >>>>> + if (acb->wqbuf_getIndex != acb->wqbuf_putIndex)
> >>>>> arcmsr_write_ioctldata2iop(acb);
> >>>>> - if (acb->wqbuf_firstindex == acb->wqbuf_lastindex)
> >>>>> + if (acb->wqbuf_getIndex == acb->wqbuf_putIndex)
> >>>>> acb->acb_flags |= ACB_F_MESSAGE_WQBUFFER_CLEARED;
> >>>>> spin_unlock_irqrestore(&acb->wqbuffer_lock, flags);
> >>>>> }
> >>>>> @@ -2243,14 +2242,14 @@ void arcmsr_clear_iop2drv_rqueue_buffer(
> >>>>> for (i = 0; i < 15; i++) {
> >>>>> if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
> >>>>> acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
> >>>>> - acb->rqbuf_firstindex = 0;
> >>>>> - acb->rqbuf_lastindex = 0;
> >>>>> + acb->rqbuf_getIndex = 0;
> >>>>> + acb->rqbuf_putIndex = 0;
> >>>>> arcmsr_iop_message_read(acb);
> >>>>> mdelay(30);
> >>>>> - } else if (acb->rqbuf_firstindex !=
> >>>>> - acb->rqbuf_lastindex) {
> >>>>> - acb->rqbuf_firstindex = 0;
> >>>>> - acb->rqbuf_lastindex = 0;
> >>>>> + } else if (acb->rqbuf_getIndex !=
> >>>>> + acb->rqbuf_putIndex) {
> >>>>> + acb->rqbuf_getIndex = 0;
> >>>>> + acb->rqbuf_putIndex = 0;
> >>>>> mdelay(30);
> >>>>> } else
> >>>>> break;
> >>>>> @@ -2291,7 +2290,7 @@ static int arcmsr_iop_message_xfer(struc
> >>>>> unsigned char *ver_addr;
> >>>>> uint8_t *pQbuffer, *ptmpQbuffer;
> >>>>> uint32_t allxfer_len = 0;
> >>>>> - ver_addr = kmalloc(1032, GFP_ATOMIC);
> >>>>> + ver_addr = kmalloc(ARCMSR_API_DATA_BUFLEN, GFP_ATOMIC);
> >>>>> if (!ver_addr) {
> >>>>> retvalue = ARCMSR_MESSAGE_FAIL;
> >>>>> pr_info("%s: memory not enough!\n", __func__);
> >>>>> @@ -2299,64 +2298,64 @@ static int arcmsr_iop_message_xfer(struc
> >>>>> }
> >>>>> ptmpQbuffer = ver_addr;
> >>>>> spin_lock_irqsave(&acb->rqbuffer_lock, flags);
> >>>>> - if (acb->rqbuf_firstindex != acb->rqbuf_lastindex) {
> >>>>> - pQbuffer = &acb->rqbuffer[acb->rqbuf_firstindex];
> >>>>> - if (acb->rqbuf_firstindex > acb->rqbuf_lastindex) {
> >>>>> + if (acb->rqbuf_getIndex != acb->rqbuf_putIndex) {
> >>>>> + pQbuffer = &acb->rqbuffer[acb->rqbuf_getIndex];
> >>>>> + if (acb->rqbuf_getIndex > acb->rqbuf_putIndex) {
> >>>>> if ((ARCMSR_MAX_QBUFFER -
> >>>>> - acb->rqbuf_firstindex) >= 1032) {
> >>>>> - memcpy(ptmpQbuffer, pQbuffer, 1032);
> >>>>> - acb->rqbuf_firstindex += 1032;
> >>>>> - acb->rqbuf_firstindex %= ARCMSR_MAX_QBUFFER;
> >>>>> - allxfer_len = 1032;
> >>>>> + acb->rqbuf_getIndex) >= ARCMSR_API_DATA_BUFLEN) {
> >>>>> + memcpy(ptmpQbuffer, pQbuffer, ARCMSR_API_DATA_BUFLEN);
> >>>>> + acb->rqbuf_getIndex += ARCMSR_API_DATA_BUFLEN;
> >>>>> + acb->rqbuf_getIndex %= ARCMSR_MAX_QBUFFER;
> >>>>> + allxfer_len = ARCMSR_API_DATA_BUFLEN;
> >>>>> } else {
> >>>>> if (((ARCMSR_MAX_QBUFFER -
> >>>>> - acb->rqbuf_firstindex) +
> >>>>> - acb->rqbuf_lastindex) > 1032) {
> >>>>> + acb->rqbuf_getIndex) +
> >>>>> + acb->rqbuf_putIndex) > ARCMSR_API_DATA_BUFLEN) {
> >>>>> memcpy(ptmpQbuffer,
> >>>>> pQbuffer, ARCMSR_MAX_QBUFFER
> >>>>> - - acb->rqbuf_firstindex);
> >>>>> + - acb->rqbuf_getIndex);
> >>>>> ptmpQbuffer +=
> >>>>> ARCMSR_MAX_QBUFFER -
> >>>>> - acb->rqbuf_firstindex;
> >>>>> + acb->rqbuf_getIndex;
> >>>>> memcpy(ptmpQbuffer,
> >>>>> - acb->rqbuffer, 1032 -
> >>>>> + acb->rqbuffer, ARCMSR_API_DATA_BUFLEN -
> >>>>> (ARCMSR_MAX_QBUFFER
> >>>>> - - acb->rqbuf_firstindex));
> >>>>> - acb->rqbuf_firstindex =
> >>>>> - 1032 - (ARCMSR_MAX_QBUFFER
> >>>>> - - acb->rqbuf_firstindex);
> >>>>> - allxfer_len = 1032;
> >>>>> + - acb->rqbuf_getIndex));
> >>>>> + acb->rqbuf_getIndex =
> >>>>> + ARCMSR_API_DATA_BUFLEN - (ARCMSR_MAX_QBUFFER
> >>>>> + - acb->rqbuf_getIndex);
> >>>>> + allxfer_len = ARCMSR_API_DATA_BUFLEN;
> >>>>> } else {
> >>>>> memcpy(ptmpQbuffer,
> >>>>> pQbuffer, ARCMSR_MAX_QBUFFER
> >>>>> - - acb->rqbuf_firstindex);
> >>>>> + - acb->rqbuf_getIndex);
> >>>>> ptmpQbuffer +=
> >>>>> ARCMSR_MAX_QBUFFER -
> >>>>> - acb->rqbuf_firstindex;
> >>>>> + acb->rqbuf_getIndex;
> >>>>> memcpy(ptmpQbuffer,
> >>>>> acb->rqbuffer,
> >>>>> - acb->rqbuf_lastindex);
> >>>>> + acb->rqbuf_putIndex);
> >>>>> allxfer_len = ARCMSR_MAX_QBUFFER
> >>>>> - - acb->rqbuf_firstindex +
> >>>>> - acb->rqbuf_lastindex;
> >>>>> - acb->rqbuf_firstindex =
> >>>>> - acb->rqbuf_lastindex;
> >>>>> + - acb->rqbuf_getIndex +
> >>>>> + acb->rqbuf_putIndex;
> >>>>> + acb->rqbuf_getIndex =
> >>>>> + acb->rqbuf_putIndex;
> >>>>> }
> >>>>> }
> >>>>> } else {
> >>>>> - if ((acb->rqbuf_lastindex -
> >>>>> - acb->rqbuf_firstindex) > 1032) {
> >>>>> - memcpy(ptmpQbuffer, pQbuffer, 1032);
> >>>>> - acb->rqbuf_firstindex += 1032;
> >>>>> - allxfer_len = 1032;
> >>>>> + if ((acb->rqbuf_putIndex -
> >>>>> + acb->rqbuf_getIndex) > ARCMSR_API_DATA_BUFLEN) {
> >>>>> + memcpy(ptmpQbuffer, pQbuffer, ARCMSR_API_DATA_BUFLEN);
> >>>>> + acb->rqbuf_getIndex += ARCMSR_API_DATA_BUFLEN;
> >>>>> + allxfer_len = ARCMSR_API_DATA_BUFLEN;
> >>>>> } else {
> >>>>> memcpy(ptmpQbuffer, pQbuffer,
> >>>>> - acb->rqbuf_lastindex -
> >>>>> - acb->rqbuf_firstindex);
> >>>>> - allxfer_len = acb->rqbuf_lastindex
> >>>>> - - acb->rqbuf_firstindex;
> >>>>> - acb->rqbuf_firstindex =
> >>>>> - acb->rqbuf_lastindex;
> >>>>> + acb->rqbuf_putIndex -
> >>>>> + acb->rqbuf_getIndex);
> >>>>> + allxfer_len = acb->rqbuf_putIndex
> >>>>> + - acb->rqbuf_getIndex;
> >>>>> + acb->rqbuf_getIndex =
> >>>>> + acb->rqbuf_putIndex;
> >>>>> }
> >>>>> }
- if (acb->rqbuf_firstindex != acb->rqbuf_lastindex) {
- pQbuffer = &acb->rqbuffer[acb->rqbuf_firstindex];
- if (acb->rqbuf_firstindex > acb->rqbuf_lastindex) {
- if ((ARCMSR_MAX_QBUFFER -
- acb->rqbuf_firstindex) >= 1032) {
- memcpy(ptmpQbuffer, pQbuffer, 1032);
- acb->rqbuf_firstindex += 1032;
- acb->rqbuf_firstindex %= ARCMSR_MAX_QBUFFER;
- allxfer_len = 1032;
- } else {
- if (((ARCMSR_MAX_QBUFFER -
- acb->rqbuf_firstindex) +
- acb->rqbuf_lastindex) > 1032) {
- memcpy(ptmpQbuffer,
- pQbuffer, ARCMSR_MAX_QBUFFER
- - acb->rqbuf_firstindex);
- ptmpQbuffer +=
- ARCMSR_MAX_QBUFFER -
- acb->rqbuf_firstindex;
- memcpy(ptmpQbuffer,
- acb->rqbuffer, 1032 -
- (ARCMSR_MAX_QBUFFER
- - acb->rqbuf_firstindex));
- acb->rqbuf_firstindex =
- 1032 - (ARCMSR_MAX_QBUFFER
- - acb->rqbuf_firstindex);
- allxfer_len = 1032;
- } else {
- memcpy(ptmpQbuffer,
- pQbuffer, ARCMSR_MAX_QBUFFER
- - acb->rqbuf_firstindex);
- ptmpQbuffer +=
- ARCMSR_MAX_QBUFFER -
- acb->rqbuf_firstindex;
- memcpy(ptmpQbuffer,
- acb->rqbuffer,
- acb->rqbuf_lastindex);
- allxfer_len = ARCMSR_MAX_QBUFFER
- - acb->rqbuf_firstindex +
- acb->rqbuf_lastindex;
- acb->rqbuf_firstindex =
- acb->rqbuf_lastindex;
- }
- }
- } else {
- if ((acb->rqbuf_lastindex -
- acb->rqbuf_firstindex) > 1032) {
- memcpy(ptmpQbuffer, pQbuffer, 1032);
- acb->rqbuf_firstindex += 1032;
- allxfer_len = 1032;
- } else {
- memcpy(ptmpQbuffer, pQbuffer,
- acb->rqbuf_lastindex -
- acb->rqbuf_firstindex);
- allxfer_len = acb->rqbuf_lastindex
- - acb->rqbuf_firstindex;
- acb->rqbuf_firstindex =
- acb->rqbuf_lastindex;
- }
+ if (acb->rqbuf_getIndex != acb->rqbuf_putIndex) {
+ unsigned int tail = acb->rqbuf_getIndex;
+ unsigned int head = acb->rqbuf_putIndex;
+ unsigned int cnt_to_end = CIRC_CNT_TO_END(head, tail, ARCMSR_MAX_QBUFFER);
+
+ allxfer_len = CIRC_CNT(head, tail, ARCMSR_MAX_QBUFFER);
+ if (allxfer_len > ARCMSR_API_DATA_BUFLEN)
+ allxfer_len = ARCMSR_API_DATA_BUFLEN;
+
+ if (allxfer_len <= cnt_to_end)
+ memcpy(ptmpQbuffer, acb->rqbuffer + tail, allxfer_len);
+ else {
+ memcpy(ptmpQbuffer, acb->rqbuffer + tail, cnt_to_end);
+ memcpy(ptmpQbuffer + cnt_to_end, acb->rqbuffer, allxfer_len - cnt_to_end);
}
+ acb->rqbuf_getIndex = (acb->rqbuf_getIndex + allxfer_len) % ARCMSR_MAX_QBUFFER;
> >>>>> }
> >>>>> @@ -2382,9 +2381,9 @@ static int arcmsr_iop_message_xfer(struc
> >>>>> }
> >>>>> case ARCMSR_MESSAGE_WRITE_WQBUFFER: {
> >>>>> unsigned char *ver_addr;
> >>>>> - int32_t my_empty_len, user_len, wqbuf_firstindex, wqbuf_lastindex;
> >>>>> + int32_t my_empty_len, user_len, wqbuf_getIndex, wqbuf_putIndex;
> >>>>> uint8_t *pQbuffer, *ptmpuserbuffer;
> >>>>> - ver_addr = kmalloc(1032, GFP_ATOMIC);
> >>>>> + ver_addr = kmalloc(ARCMSR_API_DATA_BUFLEN, GFP_ATOMIC);
> >>>>> if (!ver_addr) {
> >>>>> retvalue = ARCMSR_MESSAGE_FAIL;
> >>>>> goto message_out;
> >>>>> @@ -2394,9 +2393,9 @@ static int arcmsr_iop_message_xfer(struc
> >>>>> memcpy(ptmpuserbuffer,
> >>>>> pcmdmessagefld->messagedatabuffer, user_len);
> >>>>> spin_lock_irqsave(&acb->wqbuffer_lock, flags);
> >>>>> - wqbuf_lastindex = acb->wqbuf_lastindex;
> >>>>> - wqbuf_firstindex = acb->wqbuf_firstindex;
> >>>>> - if (wqbuf_lastindex != wqbuf_firstindex) {
> >>>>> + wqbuf_putIndex = acb->wqbuf_putIndex;
> >>>>> + wqbuf_getIndex = acb->wqbuf_getIndex;
> >>>>> + if (wqbuf_putIndex != wqbuf_getIndex) {
> >>>>> struct SENSE_DATA *sensebuffer =
> >>>>> (struct SENSE_DATA *)cmd->sense_buffer;
> >>>>> arcmsr_write_ioctldata2iop(acb);
> >>>>> @@ -2408,27 +2407,27 @@ static int arcmsr_iop_message_xfer(struc
> >>>>> sensebuffer->Valid = 1;
> >>>>> retvalue = ARCMSR_MESSAGE_FAIL;
> >>>>> } else {
> >>>>> - my_empty_len = (wqbuf_firstindex - wqbuf_lastindex - 1)
> >>>>> + my_empty_len = (wqbuf_getIndex - wqbuf_putIndex - 1)
> >>>>> & (ARCMSR_MAX_QBUFFER - 1);
> >>>>> if (my_empty_len >= user_len) {
> >>>>> while (user_len > 0) {
> >>>>> - pQbuffer = &acb->wqbuffer[acb->wqbuf_lastindex];
> >>>>> - if ((acb->wqbuf_lastindex + user_len)
> >>>>> + pQbuffer = &acb->wqbuffer[acb->wqbuf_putIndex];
> >>>>> + if ((acb->wqbuf_putIndex + user_len)
> >>>>> > ARCMSR_MAX_QBUFFER) {
> >>>>> memcpy(pQbuffer, ptmpuserbuffer,
> >>>>> ARCMSR_MAX_QBUFFER -
> >>>>> - acb->wqbuf_lastindex);
> >>>>> + acb->wqbuf_putIndex);
> >>>>> ptmpuserbuffer +=
> >>>>> (ARCMSR_MAX_QBUFFER
> >>>>> - - acb->wqbuf_lastindex);
> >>>>> + - acb->wqbuf_putIndex);
> >>>>> user_len -= (ARCMSR_MAX_QBUFFER
> >>>>> - - acb->wqbuf_lastindex);
> >>>>> - acb->wqbuf_lastindex = 0;
> >>>>> + - acb->wqbuf_putIndex);
> >>>>> + acb->wqbuf_putIndex = 0;
> >>>>> } else {
> >>>>> memcpy(pQbuffer, ptmpuserbuffer,
> >>>>> user_len);
> >>>>> - acb->wqbuf_lastindex += user_len;
> >>>>> - acb->wqbuf_lastindex %=
> >>>>> + acb->wqbuf_putIndex += user_len;
> >>>>> + acb->wqbuf_putIndex %=
> >>>>> ARCMSR_MAX_QBUFFER;
> >>>>> user_len = 0;
> >>>>> }
> >>>>> @@ -2468,8 +2467,8 @@ static int arcmsr_iop_message_xfer(struc
> >>>>> arcmsr_clear_iop2drv_rqueue_buffer(acb);
> >>>>> spin_lock_irqsave(&acb->rqbuffer_lock, flags);
> >>>>> acb->acb_flags |= ACB_F_MESSAGE_RQBUFFER_CLEARED;
> >>>>> - acb->rqbuf_firstindex = 0;
> >>>>> - acb->rqbuf_lastindex = 0;
> >>>>> + acb->rqbuf_getIndex = 0;
> >>>>> + acb->rqbuf_putIndex = 0;
> >>>>> memset(pQbuffer, 0, ARCMSR_MAX_QBUFFER);
> >>>>> spin_unlock_irqrestore(&acb->rqbuffer_lock, flags);
> >>>>> if (acb->fw_flag == FW_DEADLOCK)
> >>>>> @@ -2485,8 +2484,8 @@ static int arcmsr_iop_message_xfer(struc
> >>>>> spin_lock_irqsave(&acb->wqbuffer_lock, flags);
> >>>>> acb->acb_flags |= (ACB_F_MESSAGE_WQBUFFER_CLEARED |
> >>>>> ACB_F_MESSAGE_WQBUFFER_READED);
> >>>>> - acb->wqbuf_firstindex = 0;
> >>>>> - acb->wqbuf_lastindex = 0;
> >>>>> + acb->wqbuf_getIndex = 0;
> >>>>> + acb->wqbuf_putIndex = 0;
> >>>>> memset(pQbuffer, 0, ARCMSR_MAX_QBUFFER);
> >>>>> spin_unlock_irqrestore(&acb->wqbuffer_lock, flags);
> >>>>> if (acb->fw_flag == FW_DEADLOCK)
> >>>>> @@ -2502,16 +2501,16 @@ static int arcmsr_iop_message_xfer(struc
> >>>>> arcmsr_clear_iop2drv_rqueue_buffer(acb);
> >>>>> spin_lock_irqsave(&acb->rqbuffer_lock, flags);
> >>>>> acb->acb_flags |= ACB_F_MESSAGE_RQBUFFER_CLEARED;
> >>>>> - acb->rqbuf_firstindex = 0;
> >>>>> - acb->rqbuf_lastindex = 0;
> >>>>> + acb->rqbuf_getIndex = 0;
> >>>>> + acb->rqbuf_putIndex = 0;
> >>>>> pQbuffer = acb->rqbuffer;
> >>>>> memset(pQbuffer, 0, sizeof(struct QBUFFER));
> >>>>> spin_unlock_irqrestore(&acb->rqbuffer_lock, flags);
> >>>>> spin_lock_irqsave(&acb->wqbuffer_lock, flags);
> >>>>> acb->acb_flags |= (ACB_F_MESSAGE_WQBUFFER_CLEARED |
> >>>>> ACB_F_MESSAGE_WQBUFFER_READED);
> >>>>> - acb->wqbuf_firstindex = 0;
> >>>>> - acb->wqbuf_lastindex = 0;
> >>>>> + acb->wqbuf_getIndex = 0;
> >>>>> + acb->wqbuf_putIndex = 0;
> >>>>> pQbuffer = acb->wqbuffer;
> >>>>> memset(pQbuffer, 0, sizeof(struct QBUFFER));
> >>>>> spin_unlock_irqrestore(&acb->wqbuffer_lock, flags);
> >>>>>
> >>>>>
> >>>>>
> >>>>> --
> >>>>> 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
> >>> --
> >>> 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
> >
>
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