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Date: Mon, 25 Aug 2014 12:29:40 +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 08/25/2014 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?
>> 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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