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Commit 0c9f5ba7 authored by Stephen M. Cameron's avatar Stephen M. Cameron Committed by Jens Axboe
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cciss: factor out cciss_big_passthru 

Signed-off-by: default avatarStephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: default avatarJens Axboe <jaxboe@fusionio.com>
parent f32f125b
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Showing with 151 additions and 156 deletions
drivers/block/cciss.c
View file @ 0c9f5ba7
......@@ -1498,6 +1498,155 @@ static int cciss_passthru(ctlr_info_t *h, void __user *argp)
return 0;
}
static int cciss_bigpassthru(ctlr_info_t *h, void __user *argp)
{
BIG_IOCTL_Command_struct *ioc;
CommandList_struct *c;
unsigned char **buff = NULL;
int *buff_size = NULL;
u64bit temp64;
BYTE sg_used = 0;
int status = 0;
int i;
DECLARE_COMPLETION_ONSTACK(wait);
__u32 left;
__u32 sz;
BYTE __user *data_ptr;
if (!argp)
return -EINVAL;
if (!capable(CAP_SYS_RAWIO))
return -EPERM;
ioc = (BIG_IOCTL_Command_struct *)
kmalloc(sizeof(*ioc), GFP_KERNEL);
if (!ioc) {
status = -ENOMEM;
goto cleanup1;
}
if (copy_from_user(ioc, argp, sizeof(*ioc))) {
status = -EFAULT;
goto cleanup1;
}
if ((ioc->buf_size < 1) &&
(ioc->Request.Type.Direction != XFER_NONE)) {
status = -EINVAL;
goto cleanup1;
}
/* Check kmalloc limits using all SGs */
if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
status = -EINVAL;
goto cleanup1;
}
if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
status = -EINVAL;
goto cleanup1;
}
buff = kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
if (!buff) {
status = -ENOMEM;
goto cleanup1;
}
buff_size = kmalloc(MAXSGENTRIES * sizeof(int), GFP_KERNEL);
if (!buff_size) {
status = -ENOMEM;
goto cleanup1;
}
left = ioc->buf_size;
data_ptr = ioc->buf;
while (left) {
sz = (left > ioc->malloc_size) ? ioc->malloc_size : left;
buff_size[sg_used] = sz;
buff[sg_used] = kmalloc(sz, GFP_KERNEL);
if (buff[sg_used] == NULL) {
status = -ENOMEM;
goto cleanup1;
}
if (ioc->Request.Type.Direction == XFER_WRITE) {
if (copy_from_user(buff[sg_used], data_ptr, sz)) {
status = -EFAULT;
goto cleanup1;
}
} else {
memset(buff[sg_used], 0, sz);
}
left -= sz;
data_ptr += sz;
sg_used++;
}
c = cmd_special_alloc(h);
if (!c) {
status = -ENOMEM;
goto cleanup1;
}
c->cmd_type = CMD_IOCTL_PEND;
c->Header.ReplyQueue = 0;
if (ioc->buf_size > 0) {
c->Header.SGList = sg_used;
c->Header.SGTotal = sg_used;
} else {
c->Header.SGList = 0;
c->Header.SGTotal = 0;
}
c->Header.LUN = ioc->LUN_info;
c->Header.Tag.lower = c->busaddr;
c->Request = ioc->Request;
if (ioc->buf_size > 0) {
for (i = 0; i < sg_used; i++) {
temp64.val =
pci_map_single(h->pdev, buff[i], buff_size[i],
PCI_DMA_BIDIRECTIONAL);
c->SG[i].Addr.lower = temp64.val32.lower;
c->SG[i].Addr.upper = temp64.val32.upper;
c->SG[i].Len = buff_size[i];
c->SG[i].Ext = 0; /* we are not chaining */
}
}
c->waiting = &wait;
enqueue_cmd_and_start_io(h, c);
wait_for_completion(&wait);
/* unlock the buffers from DMA */
for (i = 0; i < sg_used; i++) {
temp64.val32.lower = c->SG[i].Addr.lower;
temp64.val32.upper = c->SG[i].Addr.upper;
pci_unmap_single(h->pdev,
(dma_addr_t) temp64.val, buff_size[i],
PCI_DMA_BIDIRECTIONAL);
}
check_ioctl_unit_attention(h, c);
/* Copy the error information out */
ioc->error_info = *(c->err_info);
if (copy_to_user(argp, ioc, sizeof(*ioc))) {
cmd_special_free(h, c);
status = -EFAULT;
goto cleanup1;
}
if (ioc->Request.Type.Direction == XFER_READ) {
/* Copy the data out of the buffer we created */
BYTE __user *ptr = ioc->buf;
for (i = 0; i < sg_used; i++) {
if (copy_to_user(ptr, buff[i], buff_size[i])) {
cmd_special_free(h, c);
status = -EFAULT;
goto cleanup1;
}
ptr += buff_size[i];
}
}
cmd_special_free(h, c);
status = 0;
cleanup1:
if (buff) {
for (i = 0; i < sg_used; i++)
kfree(buff[i]);
kfree(buff);
}
kfree(buff_size);
kfree(ioc);
return status;
}
static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
unsigned int cmd, unsigned long arg)
{
......@@ -1534,162 +1683,8 @@ static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
return cciss_getluninfo(h, disk, argp);
case CCISS_PASSTHRU:
return cciss_passthru(h, argp);
case CCISS_BIG_PASSTHRU:{
BIG_IOCTL_Command_struct *ioc;
CommandList_struct *c;
unsigned char **buff = NULL;
int *buff_size = NULL;
u64bit temp64;
BYTE sg_used = 0;
int status = 0;
int i;
DECLARE_COMPLETION_ONSTACK(wait);
__u32 left;
__u32 sz;
BYTE __user *data_ptr;
if (!arg)
return -EINVAL;
if (!capable(CAP_SYS_RAWIO))
return -EPERM;
ioc = (BIG_IOCTL_Command_struct *)
kmalloc(sizeof(*ioc), GFP_KERNEL);
if (!ioc) {
status = -ENOMEM;
goto cleanup1;
}
if (copy_from_user(ioc, argp, sizeof(*ioc))) {
status = -EFAULT;
goto cleanup1;
}
if ((ioc->buf_size < 1) &&
(ioc->Request.Type.Direction != XFER_NONE)) {
status = -EINVAL;
goto cleanup1;
}
/* Check kmalloc limits using all SGs */
if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
status = -EINVAL;
goto cleanup1;
}
if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
status = -EINVAL;
goto cleanup1;
}
buff =
kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
if (!buff) {
status = -ENOMEM;
goto cleanup1;
}
buff_size = kmalloc(MAXSGENTRIES * sizeof(int),
GFP_KERNEL);
if (!buff_size) {
status = -ENOMEM;
goto cleanup1;
}
left = ioc->buf_size;
data_ptr = ioc->buf;
while (left) {
sz = (left >
ioc->malloc_size) ? ioc->
malloc_size : left;
buff_size[sg_used] = sz;
buff[sg_used] = kmalloc(sz, GFP_KERNEL);
if (buff[sg_used] == NULL) {
status = -ENOMEM;
goto cleanup1;
}
if (ioc->Request.Type.Direction == XFER_WRITE) {
if (copy_from_user
(buff[sg_used], data_ptr, sz)) {
status = -EFAULT;
goto cleanup1;
}
} else {
memset(buff[sg_used], 0, sz);
}
left -= sz;
data_ptr += sz;
sg_used++;
}
c = cmd_special_alloc(h);
if (!c) {
status = -ENOMEM;
goto cleanup1;
}
c->cmd_type = CMD_IOCTL_PEND;
c->Header.ReplyQueue = 0;
if (ioc->buf_size > 0) {
c->Header.SGList = sg_used;
c->Header.SGTotal = sg_used;
} else {
c->Header.SGList = 0;
c->Header.SGTotal = 0;
}
c->Header.LUN = ioc->LUN_info;
c->Header.Tag.lower = c->busaddr;
c->Request = ioc->Request;
if (ioc->buf_size > 0) {
for (i = 0; i < sg_used; i++) {
temp64.val =
pci_map_single(h->pdev, buff[i],
buff_size[i],
PCI_DMA_BIDIRECTIONAL);
c->SG[i].Addr.lower =
temp64.val32.lower;
c->SG[i].Addr.upper =
temp64.val32.upper;
c->SG[i].Len = buff_size[i];
c->SG[i].Ext = 0; /* we are not chaining */
}
}
c->waiting = &wait;
enqueue_cmd_and_start_io(h, c);
wait_for_completion(&wait);
/* unlock the buffers from DMA */
for (i = 0; i < sg_used; i++) {
temp64.val32.lower = c->SG[i].Addr.lower;
temp64.val32.upper = c->SG[i].Addr.upper;
pci_unmap_single(h->pdev,
(dma_addr_t) temp64.val, buff_size[i],
PCI_DMA_BIDIRECTIONAL);
}
check_ioctl_unit_attention(h, c);
/* Copy the error information out */
ioc->error_info = *(c->err_info);
if (copy_to_user(argp, ioc, sizeof(*ioc))) {
cmd_special_free(h, c);
status = -EFAULT;
goto cleanup1;
}
if (ioc->Request.Type.Direction == XFER_READ) {
/* Copy the data out of the buffer we created */
BYTE __user *ptr = ioc->buf;
for (i = 0; i < sg_used; i++) {
if (copy_to_user
(ptr, buff[i], buff_size[i])) {
cmd_special_free(h, c);
status = -EFAULT;
goto cleanup1;
}
ptr += buff_size[i];
}
}
cmd_special_free(h, c);
status = 0;
cleanup1:
if (buff) {
for (i = 0; i < sg_used; i++)
kfree(buff[i]);
kfree(buff);
}
kfree(buff_size);
kfree(ioc);
return status;
}
case CCISS_BIG_PASSTHRU:
return cciss_bigpassthru(h, argp);
/* scsi_cmd_ioctl handles these, below, though some are not */
/* very meaningful for cciss. SG_IO is the main one people want. */
......
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