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Date: Tue, 26 Aug 2014 15:20:58 +0200
From: Tomas Henzl <thenzl@...hat.com>
To: Ching Huang <ching2048@...ca.com.tw>
CC: hch@...radead.org, jbottomley@...allels.com,
dan.carpenter@...cle.com, agordeev@...hat.com,
linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 13/17] arcmsr: fix ioctl data read/write error for
adapter type C
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@...ca.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@...ca.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?
> 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
>
>>>> 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@...r.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@...ca.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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