Re: [PATCH v3 13/17] arcmsr: fix ioctl data read/write error for adapter type C

Tomas Henzl
2014-08-25T12:52:59Z

On 08/25/2014 12:29 PM, 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@areca.com.tw>
>>>>
>>>> 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@areca.com.tw>
>>>> ---
>>>>
>>>> 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?

And when it is copying from a ring buffer, maybe it could be made in a simpler way?
What do you think about this (not even compile tested, just an idea):
spin_lock_irqsave(&acb->rqbuffer_lock, flags);

unsigned int tail = acb->rqbuf_firstindex;
unsigned int head = acb->rqbuf_lastindex;
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 > 1032)
allxfer_len = 1032;

if (allxfer_len <= cnt_to_end)
memcpy(buf, acb->rqbuffer + tail, allxfer_len);
else {
memcpy(buf, acb->rqbuffer + tails, cnt_to_end);
memcpy(buf + cnt_to_end, acb->rqbuffer, allxfer_len - cnt_to_end);
}
acb->rqbuf_firstindex = (acb->rqbuf_firstindex + allxfer_len) % ARCMSR_MAX_QBUFFER;

>
>>> 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@vger.kernel.org
>>>> 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@areca.com.tw>
>> ---
>>
>> 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;
>> }
>> }
>> }
>> @@ -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;
>> }
>> }
>> }
>> @@ -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);
>>
>>
>>
>> --
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