Commit message: [SCSI] pmcraid: reject negative request size

There's a code path in pmcraid that can be reached via device ioctl that
causes all sorts of ugliness, including heap corruption or triggering the
OOM killer due to consecutive allocation of large numbers of pages.

First, the user can call pmcraid_chr_ioctl(), with a type
PMCRAID_PASSTHROUGH_IOCTL.  This calls through to
pmcraid_ioctl_passthrough().  Next, a pmcraid_passthrough_ioctl_buffer
is copied in, and the request_size variable is set to
buffer->ioarcb.data_transfer_length, which is an arbitrary 32-bit
signed value provided by the user.  If a negative value is provided
here, bad things can happen.  For example,
pmcraid_build_passthrough_ioadls() is called with this request_size,
which immediately calls pmcraid_alloc_sglist() with a negative size.
The resulting math on allocating a scatter list can result in an
overflow in the kzalloc() call (if num_elem is 0, the sglist will be
smaller than expected), or if num_elem is unexpectedly large the
subsequent loop will call alloc_pages() repeatedly, a high number of
pages will be allocated and the OOM killer might be invoked.

It looks like preventing this value from being negative in
pmcraid_ioctl_passthrough() would be sufficient.

Signed-off-by: Dan Rosenberg <drosenberg@vsecurity.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
CVE: CVE-2011-2906
CWE: CWE-189
Vulnerability description: Integer signedness error in the pmcraid_ioctl_passthrough function in drivers/scsi/pmcraid.c in the Linux kernel before 3.1 might allow local users to cause a denial of service (memory consumption or memory corruption) via a negative size value in an ioctl call. NOTE: this may be a vulnerability only in unusual environments that provide a privileged program for obtaining the required file descriptor.

Project: linux
File: pmcraid.c

static void _pmcraid_fire_command(struct pmcraid_cmd *cmd)
{
	struct pmcraid_instance *pinstance = cmd->drv_inst;
	unsigned long lock_flags;

	/* Add this command block to pending cmd pool. We do this prior to
	 * writting IOARCB to ioarrin because IOA might complete the command
	 * by the time we are about to add it to the list. Response handler
	 * (isr/tasklet) looks for cmd block in the pending pending list.
	 */
	spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
	list_add_tail(&cmd->free_list, &pinstance->pending_cmd_pool);
	spin_unlock_irqrestore(&pinstance->pending_pool_lock, lock_flags);
	atomic_inc(&pinstance->outstanding_cmds);

	/* driver writes lower 32-bit value of IOARCB address only */
	mb();
	iowrite32(le32_to_cpu(cmd->ioa_cb->ioarcb.ioarcb_bus_addr),
		  pinstance->ioarrin);
}

Project: linux
File: pmcraid.c

static int _pmcraid_io_done(struct pmcraid_cmd *cmd, int reslen, int ioasc)
{
	struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
	int rc = 0;

	scsi_set_resid(scsi_cmd, reslen);

	pmcraid_info("response(%d) CDB[0] = %x ioasc:result: %x:%x\n",
		le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2,
		cmd->ioa_cb->ioarcb.cdb[0],
		ioasc, scsi_cmd->result);

	if (PMCRAID_IOASC_SENSE_KEY(ioasc) != 0)
		rc = pmcraid_error_handler(cmd);

	if (rc == 0) {
		scsi_dma_unmap(scsi_cmd);
		scsi_cmd->scsi_done(scsi_cmd);
	}

	return rc;
}

Project: linux
File: pmcraid.c

static struct pmcraid_cmd *pmcraid_abort_cmd(struct pmcraid_cmd *cmd)
{
	struct pmcraid_cmd *cancel_cmd;
	struct pmcraid_instance *pinstance;
	struct pmcraid_resource_entry *res;

	pinstance = (struct pmcraid_instance *)cmd->drv_inst;
	res = cmd->scsi_cmd->device->hostdata;

	cancel_cmd = pmcraid_get_free_cmd(pinstance);

	if (cancel_cmd == NULL) {
		pmcraid_err("%s: no cmd blocks are available\n", __func__);
		return NULL;
	}

	pmcraid_prepare_cancel_cmd(cancel_cmd, cmd);

	pmcraid_info("aborting command CDB[0]= %x with index = %d\n",
		cmd->ioa_cb->ioarcb.cdb[0],
		cmd->ioa_cb->ioarcb.response_handle >> 2);

	init_completion(&cancel_cmd->wait_for_completion);
	cancel_cmd->completion_req = 1;

	pmcraid_info("command (%d) CDB[0] = %x for %x\n",
		le32_to_cpu(cancel_cmd->ioa_cb->ioarcb.response_handle) >> 2,
		cancel_cmd->ioa_cb->ioarcb.cdb[0],
		le32_to_cpu(cancel_cmd->ioa_cb->ioarcb.resource_handle));

	pmcraid_send_cmd(cancel_cmd,
			 pmcraid_internal_done,
			 PMCRAID_INTERNAL_TIMEOUT,
			 pmcraid_timeout_handler);
	return cancel_cmd;
}

Project: linux
File: pmcraid.c

static int pmcraid_abort_complete(struct pmcraid_cmd *cancel_cmd)
{
	struct pmcraid_resource_entry *res;
	u32 ioasc;

	wait_for_completion(&cancel_cmd->wait_for_completion);
	res = cancel_cmd->res;
	cancel_cmd->res = NULL;
	ioasc = le32_to_cpu(cancel_cmd->ioa_cb->ioasa.ioasc);

	/* If the abort task is not timed out we will get a Good completion
	 * as sense_key, otherwise we may get one the following responses
	 * due to subsequent bus reset or device reset. In case IOASC is
	 * NR_SYNC_REQUIRED, set sync_reqd flag for the corresponding resource
	 */
	if (ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET ||
	    ioasc == PMCRAID_IOASC_NR_SYNC_REQUIRED) {
		if (ioasc == PMCRAID_IOASC_NR_SYNC_REQUIRED)
			res->sync_reqd = 1;
		ioasc = 0;
	}

	/* complete the command here itself */
	pmcraid_return_cmd(cancel_cmd);
	return PMCRAID_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS;
}

Project: linux
File: pmcraid.c

static struct pmcraid_sglist *pmcraid_alloc_sglist(int buflen)
{
	struct pmcraid_sglist *sglist;
	struct scatterlist *scatterlist;
	struct page *page;
	int num_elem, i, j;
	int sg_size;
	int order;
	int bsize_elem;

	sg_size = buflen / (PMCRAID_MAX_IOADLS - 1);
	order = (sg_size > 0) ? get_order(sg_size) : 0;
	bsize_elem = PAGE_SIZE * (1 << order);

	/* Determine the actual number of sg entries needed */
	if (buflen % bsize_elem)
		num_elem = (buflen / bsize_elem) + 1;
	else
		num_elem = buflen / bsize_elem;

	/* Allocate a scatter/gather list for the DMA */
	sglist = kzalloc(sizeof(struct pmcraid_sglist) +
			 (sizeof(struct scatterlist) * (num_elem - 1)),
			 GFP_KERNEL);

	if (sglist == NULL)
		return NULL;

	scatterlist = sglist->scatterlist;
	sg_init_table(scatterlist, num_elem);
	sglist->order = order;
	sglist->num_sg = num_elem;
	sg_size = buflen;

	for (i = 0; i < num_elem; i++) {
		page = alloc_pages(GFP_KERNEL|GFP_DMA|__GFP_ZERO, order);
		if (!page) {
			for (j = i - 1; j >= 0; j--)
				__free_pages(sg_page(&scatterlist[j]), order);
			kfree(sglist);
			return NULL;
		}

		sg_set_page(&scatterlist[i], page,
			sg_size < bsize_elem ? sg_size : bsize_elem, 0);
		sg_size -= bsize_elem;
	}

	return sglist;
}

Project: linux
File: pmcraid.c

pmcraid_allocate_cmd_blocks(struct pmcraid_instance *pinstance)
{
	int i;

	sprintf(pinstance->cmd_pool_name, "pmcraid_cmd_pool_%d",
		pinstance->host->unique_id);


	pinstance->cmd_cachep = kmem_cache_create(
					pinstance->cmd_pool_name,
					sizeof(struct pmcraid_cmd), 0,
					SLAB_HWCACHE_ALIGN, NULL);
	if (!pinstance->cmd_cachep)
		return -ENOMEM;

	for (i = 0; i < PMCRAID_MAX_CMD; i++) {
		pinstance->cmd_list[i] =
			kmem_cache_alloc(pinstance->cmd_cachep, GFP_KERNEL);
		if (!pinstance->cmd_list[i]) {
			pmcraid_release_cmd_blocks(pinstance, i);
			return -ENOMEM;
		}
	}
	return 0;
}

Project: linux
File: pmcraid.c

pmcraid_allocate_config_buffers(struct pmcraid_instance *pinstance)
{
	int i;

	pinstance->res_entries =
			kzalloc(sizeof(struct pmcraid_resource_entry) *
				PMCRAID_MAX_RESOURCES, GFP_KERNEL);

	if (NULL == pinstance->res_entries) {
		pmcraid_err("failed to allocate memory for resource table\n");
		return -ENOMEM;
	}

	for (i = 0; i < PMCRAID_MAX_RESOURCES; i++)
		list_add_tail(&pinstance->res_entries[i].queue,
			      &pinstance->free_res_q);

	pinstance->cfg_table =
		pci_alloc_consistent(pinstance->pdev,
				     sizeof(struct pmcraid_config_table),
				     &pinstance->cfg_table_bus_addr);

	if (NULL == pinstance->cfg_table) {
		pmcraid_err("couldn't alloc DMA memory for config table\n");
		pmcraid_release_config_buffers(pinstance);
		return -ENOMEM;
	}

	if (pmcraid_allocate_hcams(pinstance)) {
		pmcraid_err("could not alloc DMA memory for HCAMS\n");
		pmcraid_release_config_buffers(pinstance);
		return -ENOMEM;
	}

	return 0;
}

Project: linux
File: pmcraid.c

pmcraid_allocate_control_blocks(struct pmcraid_instance *pinstance)
{
	int i;

	sprintf(pinstance->ctl_pool_name, "pmcraid_control_pool_%d",
		pinstance->host->unique_id);

	pinstance->control_pool =
		pci_pool_create(pinstance->ctl_pool_name,
				pinstance->pdev,
				sizeof(struct pmcraid_control_block),
				PMCRAID_IOARCB_ALIGNMENT, 0);

	if (!pinstance->control_pool)
		return -ENOMEM;

	for (i = 0; i < PMCRAID_MAX_CMD; i++) {
		pinstance->cmd_list[i]->ioa_cb =
			pci_pool_alloc(
				pinstance->control_pool,
				GFP_KERNEL,
				&(pinstance->cmd_list[i]->ioa_cb_bus_addr));

		if (!pinstance->cmd_list[i]->ioa_cb) {
			pmcraid_release_control_blocks(pinstance, i);
			return -ENOMEM;
		}
		memset(pinstance->cmd_list[i]->ioa_cb, 0,
			sizeof(struct pmcraid_control_block));
	}
	return 0;
}

Project: linux
File: pmcraid.c

static int pmcraid_allocate_hcams(struct pmcraid_instance *pinstance)
{
	pinstance->ccn.msg = pci_alloc_consistent(
					pinstance->pdev,
					PMCRAID_AEN_HDR_SIZE +
					sizeof(struct pmcraid_hcam_ccn_ext),
					&(pinstance->ccn.baddr));

	pinstance->ldn.msg = pci_alloc_consistent(
					pinstance->pdev,
					PMCRAID_AEN_HDR_SIZE +
					sizeof(struct pmcraid_hcam_ldn),
					&(pinstance->ldn.baddr));

	if (pinstance->ldn.msg == NULL || pinstance->ccn.msg == NULL) {
		pmcraid_release_hcams(pinstance);
	} else {
		pinstance->ccn.hcam =
			(void *)pinstance->ccn.msg + PMCRAID_AEN_HDR_SIZE;
		pinstance->ldn.hcam =
			(void *)pinstance->ldn.msg + PMCRAID_AEN_HDR_SIZE;

		atomic_set(&pinstance->ccn.ignore, 0);
		atomic_set(&pinstance->ldn.ignore, 0);
	}

	return (pinstance->ldn.msg == NULL) ? -ENOMEM : 0;
}

Project: linux
File: pmcraid.c

pmcraid_allocate_host_rrqs(struct pmcraid_instance *pinstance)
{
	int i, buffer_size;

	buffer_size = HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD;

	for (i = 0; i < pinstance->num_hrrq; i++) {
		pinstance->hrrq_start[i] =
			pci_alloc_consistent(
					pinstance->pdev,
					buffer_size,
					&(pinstance->hrrq_start_bus_addr[i]));

		if (pinstance->hrrq_start[i] == 0) {
			pmcraid_err("pci_alloc failed for hrrq vector : %d\n",
				    i);
			pmcraid_release_host_rrqs(pinstance, i);
			return -ENOMEM;
		}

		memset(pinstance->hrrq_start[i], 0, buffer_size);
		pinstance->hrrq_curr[i] = pinstance->hrrq_start[i];
		pinstance->hrrq_end[i] =
			pinstance->hrrq_start[i] + PMCRAID_MAX_CMD - 1;
		pinstance->host_toggle_bit[i] = 1;
		spin_lock_init(&pinstance->hrrq_lock[i]);
	}
	return 0;
}

Project: linux
File: pmcraid.c

static int pmcraid_build_ioadl(
	struct pmcraid_instance *pinstance,
	struct pmcraid_cmd *cmd
)
{
	int i, nseg;
	struct scatterlist *sglist;

	struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
	struct pmcraid_ioarcb *ioarcb = &(cmd->ioa_cb->ioarcb);
	struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;

	u32 length = scsi_bufflen(scsi_cmd);

	if (!length)
		return 0;

	nseg = scsi_dma_map(scsi_cmd);

	if (nseg < 0) {
		scmd_printk(KERN_ERR, scsi_cmd, "scsi_map_dma failed!\n");
		return -1;
	} else if (nseg > PMCRAID_MAX_IOADLS) {
		scsi_dma_unmap(scsi_cmd);
		scmd_printk(KERN_ERR, scsi_cmd,
			"sg count is (%d) more than allowed!\n", nseg);
		return -1;
	}

	/* Initialize IOARCB data transfer length fields */
	if (scsi_cmd->sc_data_direction == DMA_TO_DEVICE)
		ioarcb->request_flags0 |= TRANSFER_DIR_WRITE;

	ioarcb->request_flags0 |= NO_LINK_DESCS;
	ioarcb->data_transfer_length = cpu_to_le32(length);
	ioadl = pmcraid_init_ioadls(cmd, nseg);

	/* Initialize IOADL descriptor addresses */
	scsi_for_each_sg(scsi_cmd, sglist, nseg, i) {
		ioadl[i].data_len = cpu_to_le32(sg_dma_len(sglist));
		ioadl[i].address = cpu_to_le64(sg_dma_address(sglist));
		ioadl[i].flags = 0;
	}
	/* setup last descriptor */
	ioadl[i - 1].flags = IOADL_FLAGS_LAST_DESC;

	return 0;
}

Project: linux
File: pmcraid.c

static int pmcraid_build_passthrough_ioadls(
	struct pmcraid_cmd *cmd,
	int buflen,
	int direction
)
{
	struct pmcraid_sglist *sglist = NULL;
	struct scatterlist *sg = NULL;
	struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
	struct pmcraid_ioadl_desc *ioadl;
	int i;

	sglist = pmcraid_alloc_sglist(buflen);

	if (!sglist) {
		pmcraid_err("can't allocate memory for passthrough SGls\n");
		return -ENOMEM;
	}

	sglist->num_dma_sg = pci_map_sg(cmd->drv_inst->pdev,
					sglist->scatterlist,
					sglist->num_sg, direction);

	if (!sglist->num_dma_sg || sglist->num_dma_sg > PMCRAID_MAX_IOADLS) {
		dev_err(&cmd->drv_inst->pdev->dev,
			"Failed to map passthrough buffer!\n");
		pmcraid_free_sglist(sglist);
		return -EIO;
	}

	cmd->sglist = sglist;
	ioarcb->request_flags0 |= NO_LINK_DESCS;

	ioadl = pmcraid_init_ioadls(cmd, sglist->num_dma_sg);

	/* Initialize IOADL descriptor addresses */
	for_each_sg(sglist->scatterlist, sg, sglist->num_dma_sg, i) {
		ioadl[i].data_len = cpu_to_le32(sg_dma_len(sg));
		ioadl[i].address = cpu_to_le64(sg_dma_address(sg));
		ioadl[i].flags = 0;
	}

	/* setup the last descriptor */
	ioadl[i - 1].flags = IOADL_FLAGS_LAST_DESC;

	return 0;
}

Project: linux
File: pmcraid.c

static void pmcraid_cancel_all(struct pmcraid_cmd *cmd, u32 sense)
{
	struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
	struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
	struct pmcraid_resource_entry *res = scsi_cmd->device->hostdata;
	void (*cmd_done) (struct pmcraid_cmd *) = sense ? pmcraid_erp_done
							: pmcraid_request_sense;

	memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
	ioarcb->request_flags0 = SYNC_OVERRIDE;
	ioarcb->request_type = REQ_TYPE_IOACMD;
	ioarcb->cdb[0] = PMCRAID_CANCEL_ALL_REQUESTS;

	if (RES_IS_GSCSI(res->cfg_entry))
		ioarcb->cdb[1] = PMCRAID_SYNC_COMPLETE_AFTER_CANCEL;

	ioarcb->ioadl_bus_addr = 0;
	ioarcb->ioadl_length = 0;
	ioarcb->data_transfer_length = 0;
	ioarcb->ioarcb_bus_addr &= (~0x1FULL);

	/* writing to IOARRIN must be protected by host_lock, as mid-layer
	 * schedule queuecommand while we are doing this
	 */
	pmcraid_send_cmd(cmd, cmd_done,
			 PMCRAID_REQUEST_SENSE_TIMEOUT,
			 pmcraid_timeout_handler);
}

Project: linux
File: pmcraid.c

static void pmcraid_cancel_hcam(
	struct pmcraid_cmd *cmd,
	u8 type,
	void (*cmd_done) (struct pmcraid_cmd *)
)
{
	struct pmcraid_instance *pinstance;
	struct pmcraid_hostrcb  *hcam;

	pinstance = cmd->drv_inst;
	hcam =  (type == PMCRAID_HCAM_CODE_LOG_DATA) ?
		&pinstance->ldn : &pinstance->ccn;

	/* prepare for cancelling previous hcam command. If the HCAM is
	 * currently not pending with IOA, we would have hcam->cmd as non-null
	 */
	if (hcam->cmd == NULL)
		return;

	pmcraid_prepare_cancel_cmd(cmd, hcam->cmd);

	/* writing to IOARRIN must be protected by host_lock, as mid-layer
	 * schedule queuecommand while we are doing this
	 */
	pmcraid_send_cmd(cmd, cmd_done,
			 PMCRAID_INTERNAL_TIMEOUT,
			 pmcraid_timeout_handler);
}

Project: linux
File: pmcraid.c

static void pmcraid_cancel_ldn(struct pmcraid_cmd *cmd)
{
	pmcraid_cancel_hcam(cmd,
			    PMCRAID_HCAM_CODE_LOG_DATA,
			    pmcraid_cancel_ccn);
}

Project: linux
File: pmcraid.c

static int pmcraid_change_queue_depth(struct scsi_device *scsi_dev, int depth,
				      int reason)
{
	if (reason != SCSI_QDEPTH_DEFAULT)
		return -EOPNOTSUPP;

	if (depth > PMCRAID_MAX_CMD_PER_LUN)
		depth = PMCRAID_MAX_CMD_PER_LUN;

	scsi_adjust_queue_depth(scsi_dev, scsi_get_tag_type(scsi_dev), depth);

	return scsi_dev->queue_depth;
}

Project: linux
File: pmcraid.c

static int pmcraid_change_queue_type(struct scsi_device *scsi_dev, int tag)
{
	struct pmcraid_resource_entry *res;

	res = (struct pmcraid_resource_entry *)scsi_dev->hostdata;

	if ((res) && scsi_dev->tagged_supported &&
	    (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry))) {
		scsi_set_tag_type(scsi_dev, tag);

		if (tag)
			scsi_activate_tcq(scsi_dev, scsi_dev->queue_depth);
		else
			scsi_deactivate_tcq(scsi_dev, scsi_dev->queue_depth);
	} else
		tag = 0;

	return tag;
}

Project: linux
File: pmcraid.c

static int pmcraid_check_ioctl_buffer(
	int cmd,
	void __user *arg,
	struct pmcraid_ioctl_header *hdr
)
{
	int rc = 0;
	int access = VERIFY_READ;

	if (copy_from_user(hdr, arg, sizeof(struct pmcraid_ioctl_header))) {
		pmcraid_err("couldn't copy ioctl header from user buffer\n");
		return -EFAULT;
	}

	/* check for valid driver signature */
	rc = memcmp(hdr->signature,
		    PMCRAID_IOCTL_SIGNATURE,
		    sizeof(hdr->signature));
	if (rc) {
		pmcraid_err("signature verification failed\n");
		return -EINVAL;
	}

	/* check for appropriate buffer access */
	if ((_IOC_DIR(cmd) & _IOC_READ) == _IOC_READ)
		access = VERIFY_WRITE;

	rc = access_ok(access,
		       (arg + sizeof(struct pmcraid_ioctl_header)),
		       hdr->buffer_length);
	if (!rc) {
		pmcraid_err("access failed for user buffer of size %d\n",
			     hdr->buffer_length);
		return -EFAULT;
	}

	return 0;
}

Project: linux
File: pmcraid.c

static int pmcraid_chr_fasync(int fd, struct file *filep, int mode)
{
	struct pmcraid_instance *pinstance;
	int rc;

	pinstance = filep->private_data;
	mutex_lock(&pinstance->aen_queue_lock);
	rc = fasync_helper(fd, filep, mode, &pinstance->aen_queue);
	mutex_unlock(&pinstance->aen_queue_lock);

	return rc;
}

Project: linux
File: pmcraid.c

static long pmcraid_chr_ioctl(
	struct file *filep,
	unsigned int cmd,
	unsigned long arg
)
{
	struct pmcraid_instance *pinstance = NULL;
	struct pmcraid_ioctl_header *hdr = NULL;
	int retval = -ENOTTY;

	hdr = kmalloc(GFP_KERNEL, sizeof(struct pmcraid_ioctl_header));

	if (!hdr) {
		pmcraid_err("faile to allocate memory for ioctl header\n");
		return -ENOMEM;
	}

	retval = pmcraid_check_ioctl_buffer(cmd, (void *)arg, hdr);

	if (retval) {
		pmcraid_info("chr_ioctl: header check failed\n");
		kfree(hdr);
		return retval;
	}

	pinstance = filep->private_data;

	if (!pinstance) {
		pmcraid_info("adapter instance is not found\n");
		kfree(hdr);
		return -ENOTTY;
	}

	switch (_IOC_TYPE(cmd)) {

	case PMCRAID_PASSTHROUGH_IOCTL:
		/* If ioctl code is to download microcode, we need to block
		 * mid-layer requests.
		 */
		if (cmd == PMCRAID_IOCTL_DOWNLOAD_MICROCODE)
			scsi_block_requests(pinstance->host);

		retval = pmcraid_ioctl_passthrough(pinstance,
						   cmd,
						   hdr->buffer_length,
						   arg);

		if (cmd == PMCRAID_IOCTL_DOWNLOAD_MICROCODE)
			scsi_unblock_requests(pinstance->host);
		break;

	case PMCRAID_DRIVER_IOCTL:
		arg += sizeof(struct pmcraid_ioctl_header);
		retval = pmcraid_ioctl_driver(pinstance,
					      cmd,
					      hdr->buffer_length,
					      (void __user *)arg);
		break;

	default:
		retval = -ENOTTY;
		break;
	}

	kfree(hdr);

	return retval;
}

Project: linux
File: pmcraid.c

static int pmcraid_chr_open(struct inode *inode, struct file *filep)
{
	struct pmcraid_instance *pinstance;

	if (!capable(CAP_SYS_ADMIN))
		return -EACCES;

	/* Populate adapter instance * pointer for use by ioctl */
	pinstance = container_of(inode->i_cdev, struct pmcraid_instance, cdev);
	filep->private_data = pinstance;

	return 0;
}

Project: linux
File: pmcraid.c

static void pmcraid_clr_trans_op(
	struct pmcraid_instance *pinstance
)
{
	unsigned long lock_flags;

	if (!pinstance->interrupt_mode) {
		iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
			pinstance->int_regs.ioa_host_interrupt_mask_reg);
		ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
		iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
			pinstance->int_regs.ioa_host_interrupt_clr_reg);
		ioread32(pinstance->int_regs.ioa_host_interrupt_clr_reg);
	}

	if (pinstance->reset_cmd != NULL) {
		del_timer(&pinstance->reset_cmd->timer);
		spin_lock_irqsave(
			pinstance->host->host_lock, lock_flags);
		pinstance->reset_cmd->cmd_done(pinstance->reset_cmd);
		spin_unlock_irqrestore(
			pinstance->host->host_lock, lock_flags);
	}
}

Project: linux
File: pmcraid.c

static void pmcraid_complete_ioa_reset(struct pmcraid_cmd *cmd)
{
	struct pmcraid_instance *pinstance = cmd->drv_inst;
	unsigned long flags;

	spin_lock_irqsave(pinstance->host->host_lock, flags);
	pmcraid_ioa_reset(cmd);
	spin_unlock_irqrestore(pinstance->host->host_lock, flags);
	scsi_unblock_requests(pinstance->host);
	schedule_work(&pinstance->worker_q);
}

Project: linux
File: pmcraid.c

static int pmcraid_copy_sglist(
	struct pmcraid_sglist *sglist,
	unsigned long buffer,
	u32 len,
	int direction
)
{
	struct scatterlist *scatterlist;
	void *kaddr;
	int bsize_elem;
	int i;
	int rc = 0;

	/* Determine the actual number of bytes per element */
	bsize_elem = PAGE_SIZE * (1 << sglist->order);

	scatterlist = sglist->scatterlist;

	for (i = 0; i < (len / bsize_elem); i++, buffer += bsize_elem) {
		struct page *page = sg_page(&scatterlist[i]);

		kaddr = kmap(page);
		if (direction == DMA_TO_DEVICE)
			rc = __copy_from_user(kaddr,
					      (void *)buffer,
					      bsize_elem);
		else
			rc = __copy_to_user((void *)buffer, kaddr, bsize_elem);

		kunmap(page);

		if (rc) {
			pmcraid_err("failed to copy user data into sg list\n");
			return -EFAULT;
		}

		scatterlist[i].length = bsize_elem;
	}

	if (len % bsize_elem) {
		struct page *page = sg_page(&scatterlist[i]);

		kaddr = kmap(page);

		if (direction == DMA_TO_DEVICE)
			rc = __copy_from_user(kaddr,
					      (void *)buffer,
					      len % bsize_elem);
		else
			rc = __copy_to_user((void *)buffer,
					    kaddr,
					    len % bsize_elem);

		kunmap(page);

		scatterlist[i].length = len % bsize_elem;
	}

	if (rc) {
		pmcraid_err("failed to copy user data into sg list\n");
		rc = -EFAULT;
	}

	return rc;
}

Project: linux
File: pmcraid.c

static void pmcraid_disable_interrupts(
	struct pmcraid_instance *pinstance,
	u32 intrs
)
{
	u32 gmask = ioread32(pinstance->int_regs.global_interrupt_mask_reg);
	u32 nmask = gmask | GLOBAL_INTERRUPT_MASK;

	iowrite32(intrs, pinstance->int_regs.ioa_host_interrupt_clr_reg);
	iowrite32(nmask, pinstance->int_regs.global_interrupt_mask_reg);
	ioread32(pinstance->int_regs.global_interrupt_mask_reg);

	if (!pinstance->interrupt_mode) {
		iowrite32(intrs,
			pinstance->int_regs.ioa_host_interrupt_mask_reg);
		ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
	}
}

Project: linux
File: pmcraid.c

static int pmcraid_eh_abort_handler(struct scsi_cmnd *scsi_cmd)
{
	struct pmcraid_instance *pinstance;
	struct pmcraid_cmd *cmd;
	struct pmcraid_resource_entry *res;
	unsigned long host_lock_flags;
	unsigned long pending_lock_flags;
	struct pmcraid_cmd *cancel_cmd = NULL;
	int cmd_found = 0;
	int rc = FAILED;

	pinstance =
		(struct pmcraid_instance *)scsi_cmd->device->host->hostdata;

	scmd_printk(KERN_INFO, scsi_cmd,
		    "I/O command timed out, aborting it.\n");

	res = scsi_cmd->device->hostdata;

	if (res == NULL)
		return rc;

	/* If we are currently going through reset/reload, return failed.
	 * This will force the mid-layer to eventually call
	 * pmcraid_eh_host_reset which will then go to sleep and wait for the
	 * reset to complete
	 */
	spin_lock_irqsave(pinstance->host->host_lock, host_lock_flags);

	if (pinstance->ioa_reset_in_progress ||
	    pinstance->ioa_state == IOA_STATE_DEAD) {
		spin_unlock_irqrestore(pinstance->host->host_lock,
				       host_lock_flags);
		return rc;
	}

	/* loop over pending cmd list to find cmd corresponding to this
	 * scsi_cmd. Note that this command might not have been completed
	 * already. locking: all pending commands are protected with
	 * pending_pool_lock.
	 */
	spin_lock_irqsave(&pinstance->pending_pool_lock, pending_lock_flags);
	list_for_each_entry(cmd, &pinstance->pending_cmd_pool, free_list) {

		if (cmd->scsi_cmd == scsi_cmd) {
			cmd_found = 1;
			break;
		}
	}

	spin_unlock_irqrestore(&pinstance->pending_pool_lock,
				pending_lock_flags);

	/* If the command to be aborted was given to IOA and still pending with
	 * it, send ABORT_TASK to abort this and wait for its completion
	 */
	if (cmd_found)
		cancel_cmd = pmcraid_abort_cmd(cmd);

	spin_unlock_irqrestore(pinstance->host->host_lock,
			       host_lock_flags);

	if (cancel_cmd) {
		cancel_cmd->res = cmd->scsi_cmd->device->hostdata;
		rc = pmcraid_abort_complete(cancel_cmd);
	}

	return cmd_found ? rc : SUCCESS;
}

Project: linux
File: pmcraid.c

static int pmcraid_eh_bus_reset_handler(struct scsi_cmnd *scmd)
{
	scmd_printk(KERN_INFO, scmd,
		    "Doing bus reset due to an I/O command timeout.\n");
	return pmcraid_reset_device(scmd,
				    PMCRAID_RESET_BUS_TIMEOUT,
				    RESET_DEVICE_BUS);
}

Project: linux
File: pmcraid.c

static int pmcraid_eh_device_reset_handler(struct scsi_cmnd *scmd)
{
	scmd_printk(KERN_INFO, scmd,
		    "resetting device due to an I/O command timeout.\n");
	return pmcraid_reset_device(scmd,
				    PMCRAID_INTERNAL_TIMEOUT,
				    RESET_DEVICE_LUN);
}

Project: linux
File: pmcraid.c

static int pmcraid_eh_host_reset_handler(struct scsi_cmnd *scmd)
{
	unsigned long interval = 10000; /* 10 seconds interval */
	int waits = jiffies_to_msecs(PMCRAID_RESET_HOST_TIMEOUT) / interval;
	struct pmcraid_instance *pinstance =
		(struct pmcraid_instance *)(scmd->device->host->hostdata);


	/* wait for an additional 150 seconds just in case firmware could come
	 * up and if it could complete all the pending commands excluding the
	 * two HCAM (CCN and LDN).
	 */
	while (waits--) {
		if (atomic_read(&pinstance->outstanding_cmds) <=
		    PMCRAID_MAX_HCAM_CMD)
			return SUCCESS;
		msleep(interval);
	}

	dev_err(&pinstance->pdev->dev,
		"Adapter being reset due to an I/O command timeout.\n");
	return pmcraid_reset_bringup(pinstance) == 0 ? SUCCESS : FAILED;
}

Project: linux
File: pmcraid.c

static int pmcraid_eh_target_reset_handler(struct scsi_cmnd *scmd)
{
	scmd_printk(KERN_INFO, scmd,
		    "Doing target reset due to an I/O command timeout.\n");
	return pmcraid_reset_device(scmd,
				    PMCRAID_INTERNAL_TIMEOUT,
				    RESET_DEVICE_TARGET);
}

Project: linux
File: pmcraid.c

static void pmcraid_enable_interrupts(
	struct pmcraid_instance *pinstance,
	u32 intrs
)
{
	u32 gmask = ioread32(pinstance->int_regs.global_interrupt_mask_reg);
	u32 nmask = gmask & (~GLOBAL_INTERRUPT_MASK);

	iowrite32(nmask, pinstance->int_regs.global_interrupt_mask_reg);

	if (!pinstance->interrupt_mode) {
		iowrite32(~intrs,
			 pinstance->int_regs.ioa_host_interrupt_mask_reg);
		ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
	}

	pmcraid_info("enabled interrupts global mask = %x intr_mask = %x\n",
		ioread32(pinstance->int_regs.global_interrupt_mask_reg),
		ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg));
}

Project: linux
File: pmcraid.c

static void pmcraid_erp_done(struct pmcraid_cmd *cmd)
{
	struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
	struct pmcraid_instance *pinstance = cmd->drv_inst;
	u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);

	if (PMCRAID_IOASC_SENSE_KEY(ioasc) > 0) {
		scsi_cmd->result |= (DID_ERROR << 16);
		scmd_printk(KERN_INFO, scsi_cmd,
			    "command CDB[0] = %x failed with IOASC: 0x%08X\n",
			    cmd->ioa_cb->ioarcb.cdb[0], ioasc);
	}

	/* if we had allocated sense buffers for request sense, copy the sense
	 * release the buffers
	 */
	if (cmd->sense_buffer != NULL) {
		memcpy(scsi_cmd->sense_buffer,
		       cmd->sense_buffer,
		       SCSI_SENSE_BUFFERSIZE);
		pci_free_consistent(pinstance->pdev,
				    SCSI_SENSE_BUFFERSIZE,
				    cmd->sense_buffer, cmd->sense_buffer_dma);
		cmd->sense_buffer = NULL;
		cmd->sense_buffer_dma = 0;
	}

	scsi_dma_unmap(scsi_cmd);
	pmcraid_return_cmd(cmd);
	scsi_cmd->scsi_done(scsi_cmd);
}

Project: linux
File: pmcraid.c

static void __exit pmcraid_exit(void)
{
	pmcraid_netlink_release();
	unregister_chrdev_region(MKDEV(pmcraid_major, 0),
				 PMCRAID_MAX_ADAPTERS);
	pci_unregister_driver(&pmcraid_driver);
	class_destroy(pmcraid_class);
}

Project: linux
File: pmcraid.c

static int pmcraid_expose_resource(u16 fw_version,
				   struct pmcraid_config_table_entry *cfgte)
{
	int retval = 0;

	if (cfgte->resource_type == RES_TYPE_VSET) {
		if (fw_version <= PMCRAID_FW_VERSION_1)
			retval = ((cfgte->unique_flags1 & 0x80) == 0);
		else
			retval = ((cfgte->unique_flags0 & 0x80) == 0 &&
				  (cfgte->unique_flags1 & 0x80) == 0);

	} else if (cfgte->resource_type == RES_TYPE_GSCSI)
		retval = (RES_BUS(cfgte->resource_address) !=
				PMCRAID_VIRTUAL_ENCL_BUS_ID);
	return retval;
}

Project: linux
File: pmcraid.c

static void pmcraid_fail_outstanding_cmds(struct pmcraid_instance *pinstance)
{
	struct pmcraid_cmd *cmd, *temp;
	unsigned long lock_flags;

	/* pending command list is protected by pending_pool_lock. Its
	 * traversal must be done as within this lock
	 */
	spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
	list_for_each_entry_safe(cmd, temp, &pinstance->pending_cmd_pool,
				 free_list) {
		list_del(&cmd->free_list);
		spin_unlock_irqrestore(&pinstance->pending_pool_lock,
					lock_flags);
		cmd->ioa_cb->ioasa.ioasc =
			cpu_to_le32(PMCRAID_IOASC_IOA_WAS_RESET);
		cmd->ioa_cb->ioasa.ilid =
			cpu_to_be32(PMCRAID_DRIVER_ILID);

		/* In case the command timer is still running */
		del_timer(&cmd->timer);

		/* If this is an IO command, complete it by invoking scsi_done
		 * function. If this is one of the internal commands other
		 * than pmcraid_ioa_reset and HCAM commands invoke cmd_done to
		 * complete it
		 */
		if (cmd->scsi_cmd) {

			struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
			__le32 resp = cmd->ioa_cb->ioarcb.response_handle;

			scsi_cmd->result |= DID_ERROR << 16;

			scsi_dma_unmap(scsi_cmd);
			pmcraid_return_cmd(cmd);

			pmcraid_info("failing(%d) CDB[0] = %x result: %x\n",
				     le32_to_cpu(resp) >> 2,
				     cmd->ioa_cb->ioarcb.cdb[0],
				     scsi_cmd->result);
			scsi_cmd->scsi_done(scsi_cmd);
		} else if (cmd->cmd_done == pmcraid_internal_done ||
			   cmd->cmd_done == pmcraid_erp_done) {
			cmd->cmd_done(cmd);
		} else if (cmd->cmd_done != pmcraid_ioa_reset &&
			   cmd->cmd_done != pmcraid_ioa_shutdown_done) {
			pmcraid_return_cmd(cmd);
		}

		atomic_dec(&pinstance->outstanding_cmds);
		spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
	}

	spin_unlock_irqrestore(&pinstance->pending_pool_lock, lock_flags);
}

Project: linux
File: pmcraid.c

static void pmcraid_frame_auto_sense(struct pmcraid_cmd *cmd)
{
	u8 *sense_buf = cmd->scsi_cmd->sense_buffer;
	struct pmcraid_resource_entry *res = cmd->scsi_cmd->device->hostdata;
	struct pmcraid_ioasa *ioasa = &cmd->ioa_cb->ioasa;
	u32 ioasc = le32_to_cpu(ioasa->ioasc);
	u32 failing_lba = 0;

	memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE);
	cmd->scsi_cmd->result = SAM_STAT_CHECK_CONDITION;

	if (RES_IS_VSET(res->cfg_entry) &&
	    ioasc == PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC &&
	    ioasa->u.vset.failing_lba_hi != 0) {

		sense_buf[0] = 0x72;
		sense_buf[1] = PMCRAID_IOASC_SENSE_KEY(ioasc);
		sense_buf[2] = PMCRAID_IOASC_SENSE_CODE(ioasc);
		sense_buf[3] = PMCRAID_IOASC_SENSE_QUAL(ioasc);

		sense_buf[7] = 12;
		sense_buf[8] = 0;
		sense_buf[9] = 0x0A;
		sense_buf[10] = 0x80;

		failing_lba = le32_to_cpu(ioasa->u.vset.failing_lba_hi);

		sense_buf[12] = (failing_lba & 0xff000000) >> 24;
		sense_buf[13] = (failing_lba & 0x00ff0000) >> 16;
		sense_buf[14] = (failing_lba & 0x0000ff00) >> 8;
		sense_buf[15] = failing_lba & 0x000000ff;

		failing_lba = le32_to_cpu(ioasa->u.vset.failing_lba_lo);

		sense_buf[16] = (failing_lba & 0xff000000) >> 24;
		sense_buf[17] = (failing_lba & 0x00ff0000) >> 16;
		sense_buf[18] = (failing_lba & 0x0000ff00) >> 8;
		sense_buf[19] = failing_lba & 0x000000ff;
	} else {
		sense_buf[0] = 0x70;
		sense_buf[2] = PMCRAID_IOASC_SENSE_KEY(ioasc);
		sense_buf[12] = PMCRAID_IOASC_SENSE_CODE(ioasc);
		sense_buf[13] = PMCRAID_IOASC_SENSE_QUAL(ioasc);

		if (ioasc == PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC) {
			if (RES_IS_VSET(res->cfg_entry))
				failing_lba =
					le32_to_cpu(ioasa->u.
						 vset.failing_lba_lo);
			sense_buf[0] |= 0x80;
			sense_buf[3] = (failing_lba >> 24) & 0xff;
			sense_buf[4] = (failing_lba >> 16) & 0xff;
			sense_buf[5] = (failing_lba >> 8) & 0xff;
			sense_buf[6] = failing_lba & 0xff;
		}

		sense_buf[7] = 6; /* additional length */
	}
}

Project: linux
File: pmcraid.c

static void pmcraid_free_sglist(struct pmcraid_sglist *sglist)
{
	int i;

	for (i = 0; i < sglist->num_sg; i++)
		__free_pages(sg_page(&(sglist->scatterlist[i])),
			     sglist->order);

	kfree(sglist);
}

Project: linux
File: pmcraid.c

static void pmcraid_get_dump(struct pmcraid_instance *pinstance)
{
	pmcraid_info("%s is not yet implemented\n", __func__);
}

Project: linux
File: pmcraid.c

static struct pmcraid_ioasc_error *pmcraid_get_error_info(u32 ioasc)
{
	int i;
	for (i = 0; i < ARRAY_SIZE(pmcraid_ioasc_error_table); i++) {
		if (pmcraid_ioasc_error_table[i].ioasc_code == ioasc)
			return &pmcraid_ioasc_error_table[i];
	}
	return NULL;
}

Project: linux
File: pmcraid.c

static struct pmcraid_cmd *pmcraid_get_free_cmd(
	struct pmcraid_instance *pinstance
)
{
	struct pmcraid_cmd *cmd = NULL;
	unsigned long lock_flags;

	/* free cmd block list is protected by free_pool_lock */
	spin_lock_irqsave(&pinstance->free_pool_lock, lock_flags);

	if (!list_empty(&pinstance->free_cmd_pool)) {
		cmd = list_entry(pinstance->free_cmd_pool.next,
				 struct pmcraid_cmd, free_list);
		list_del(&cmd->free_list);
	}
	spin_unlock_irqrestore(&pinstance->free_pool_lock, lock_flags);

	/* Initialize the command block before giving it the caller */
	if (cmd != NULL)
		pmcraid_reinit_cmdblk(cmd);
	return cmd;
}

Project: linux
File: pmcraid.c

static void pmcraid_get_fwversion(struct pmcraid_cmd *cmd)
{
	struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
	struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
	struct pmcraid_instance *pinstance = cmd->drv_inst;
	u16 data_size = sizeof(struct pmcraid_inquiry_data);

	pmcraid_reinit_cmdblk(cmd);
	ioarcb->request_type = REQ_TYPE_SCSI;
	ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
	ioarcb->cdb[0] = INQUIRY;
	ioarcb->cdb[1] = 1;
	ioarcb->cdb[2] = 0xD0;
	ioarcb->cdb[3] = (data_size >> 8) & 0xFF;
	ioarcb->cdb[4] = data_size & 0xFF;

	/* Since entire inquiry data it can be part of IOARCB itself
	 */
	ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
					offsetof(struct pmcraid_ioarcb,
						add_data.u.ioadl[0]));
	ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
	ioarcb->ioarcb_bus_addr &= ~(0x1FULL);

	ioarcb->request_flags0 |= NO_LINK_DESCS;
	ioarcb->data_transfer_length = cpu_to_le32(data_size);
	ioadl = &(ioarcb->add_data.u.ioadl[0]);
	ioadl->flags = IOADL_FLAGS_LAST_DESC;
	ioadl->address = cpu_to_le64(pinstance->inq_data_baddr);
	ioadl->data_len = cpu_to_le32(data_size);

	pmcraid_send_cmd(cmd, pmcraid_get_fwversion_done,
			 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
}

Project: linux
File: pmcraid.c

static void pmcraid_get_fwversion_done(struct pmcraid_cmd *cmd)
{
	struct pmcraid_instance *pinstance = cmd->drv_inst;
	u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
	unsigned long lock_flags;

	/* configuration table entry size depends on firmware version. If fw
	 * version is not known, it is not possible to interpret IOA config
	 * table
	 */
	if (ioasc) {
		pmcraid_err("IOA Inquiry failed with %x\n", ioasc);
		spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
		pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
		pmcraid_reset_alert(cmd);
		spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
	} else  {
		pmcraid_querycfg(cmd);
	}
}

Project: linux
File: pmcraid.c

static unsigned short pmcraid_get_minor(void)
{
	int minor;

	minor = find_first_zero_bit(pmcraid_minor, sizeof(pmcraid_minor));
	__set_bit(minor, pmcraid_minor);
	return minor;
}

Project: linux
File: pmcraid.c

static void pmcraid_handle_config_change(struct pmcraid_instance *pinstance)
{
	struct pmcraid_config_table_entry *cfg_entry;
	struct pmcraid_hcam_ccn *ccn_hcam;
	struct pmcraid_cmd *cmd;
	struct pmcraid_cmd *cfgcmd;
	struct pmcraid_resource_entry *res = NULL;
	unsigned long lock_flags;
	unsigned long host_lock_flags;
	u32 new_entry = 1;
	u32 hidden_entry = 0;
	u16 fw_version;
	int rc;

	ccn_hcam = (struct pmcraid_hcam_ccn *)pinstance->ccn.hcam;
	cfg_entry = &ccn_hcam->cfg_entry;
	fw_version = be16_to_cpu(pinstance->inq_data->fw_version);

	pmcraid_info("CCN(%x): %x timestamp: %llx type: %x lost: %x flags: %x \
		 res: %x:%x:%x:%x\n",
		 pinstance->ccn.hcam->ilid,
		 pinstance->ccn.hcam->op_code,
		((pinstance->ccn.hcam->timestamp1) |
		((pinstance->ccn.hcam->timestamp2 & 0xffffffffLL) << 32)),
		 pinstance->ccn.hcam->notification_type,
		 pinstance->ccn.hcam->notification_lost,
		 pinstance->ccn.hcam->flags,
		 pinstance->host->unique_id,
		 RES_IS_VSET(*cfg_entry) ? PMCRAID_VSET_BUS_ID :
		 (RES_IS_GSCSI(*cfg_entry) ? PMCRAID_PHYS_BUS_ID :
			RES_BUS(cfg_entry->resource_address)),
		 RES_IS_VSET(*cfg_entry) ?
			(fw_version <= PMCRAID_FW_VERSION_1 ?
				cfg_entry->unique_flags1 :
					cfg_entry->array_id & 0xFF) :
			RES_TARGET(cfg_entry->resource_address),
		 RES_LUN(cfg_entry->resource_address));


	/* If this HCAM indicates a lost notification, read the config table */
	if (pinstance->ccn.hcam->notification_lost) {
		cfgcmd = pmcraid_get_free_cmd(pinstance);
		if (cfgcmd) {
			pmcraid_info("lost CCN, reading config table\b");
			pinstance->reinit_cfg_table = 1;
			pmcraid_querycfg(cfgcmd);
		} else {
			pmcraid_err("lost CCN, no free cmd for querycfg\n");
		}
		goto out_notify_apps;
	}

	/* If this resource is not going to be added to mid-layer, just notify
	 * applications and return. If this notification is about hiding a VSET
	 * resource, check if it was exposed already.
	 */
	if (pinstance->ccn.hcam->notification_type ==
	    NOTIFICATION_TYPE_ENTRY_CHANGED &&
	    cfg_entry->resource_type == RES_TYPE_VSET) {

		if (fw_version <= PMCRAID_FW_VERSION_1)
			hidden_entry = (cfg_entry->unique_flags1 & 0x80) != 0;
		else
			hidden_entry = (cfg_entry->unique_flags1 & 0x80) != 0;

	} else if (!pmcraid_expose_resource(fw_version, cfg_entry)) {
		goto out_notify_apps;
	}

	spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
	list_for_each_entry(res, &pinstance->used_res_q, queue) {
		rc = memcmp(&res->cfg_entry.resource_address,
			    &cfg_entry->resource_address,
			    sizeof(cfg_entry->resource_address));
		if (!rc) {
			new_entry = 0;
			break;
		}
	}

	if (new_entry) {

		if (hidden_entry) {
			spin_unlock_irqrestore(&pinstance->resource_lock,
						lock_flags);
			goto out_notify_apps;
		}

		/* If there are more number of resources than what driver can
		 * manage, do not notify the applications about the CCN. Just
		 * ignore this notifications and re-register the same HCAM
		 */
		if (list_empty(&pinstance->free_res_q)) {
			spin_unlock_irqrestore(&pinstance->resource_lock,
						lock_flags);
			pmcraid_err("too many resources attached\n");
			spin_lock_irqsave(pinstance->host->host_lock,
					  host_lock_flags);
			pmcraid_send_hcam(pinstance,
					  PMCRAID_HCAM_CODE_CONFIG_CHANGE);
			spin_unlock_irqrestore(pinstance->host->host_lock,
					       host_lock_flags);
			return;
		}

		res = list_entry(pinstance->free_res_q.next,
				 struct pmcraid_resource_entry, queue);

		list_del(&res->queue);
		res->scsi_dev = NULL;
		res->reset_progress = 0;
		list_add_tail(&res->queue, &pinstance->used_res_q);
	}

	memcpy(&res->cfg_entry, cfg_entry, pinstance->config_table_entry_size);

	if (pinstance->ccn.hcam->notification_type ==
	    NOTIFICATION_TYPE_ENTRY_DELETED || hidden_entry) {
		if (res->scsi_dev) {
			if (fw_version <= PMCRAID_FW_VERSION_1)
				res->cfg_entry.unique_flags1 &= 0x7F;
			else
				res->cfg_entry.array_id &= 0xFF;
			res->change_detected = RES_CHANGE_DEL;
			res->cfg_entry.resource_handle =
				PMCRAID_INVALID_RES_HANDLE;
			schedule_work(&pinstance->worker_q);
		} else {
			/* This may be one of the non-exposed resources */
			list_move_tail(&res->queue, &pinstance->free_res_q);
		}
	} else if (!res->scsi_dev) {
		res->change_detected = RES_CHANGE_ADD;
		schedule_work(&pinstance->worker_q);
	}
	spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);

out_notify_apps:

	/* Notify configuration changes to registered applications.*/
	if (!pmcraid_disable_aen)
		pmcraid_notify_ccn(pinstance);

	cmd = pmcraid_init_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
	if (cmd)
		pmcraid_send_hcam_cmd(cmd);
}

Project: linux
File: pmcraid.c

static void pmcraid_handle_error_log(struct pmcraid_instance *pinstance)
{
	struct pmcraid_hcam_ldn *hcam_ldn;
	u32 ioasc;

	hcam_ldn = (struct pmcraid_hcam_ldn *)pinstance->ldn.hcam;

	pmcraid_info
		("LDN(%x): %x type: %x lost: %x flags: %x overlay id: %x\n",
		 pinstance->ldn.hcam->ilid,
		 pinstance->ldn.hcam->op_code,
		 pinstance->ldn.hcam->notification_type,
		 pinstance->ldn.hcam->notification_lost,
		 pinstance->ldn.hcam->flags,
		 pinstance->ldn.hcam->overlay_id);

	/* log only the errors, no need to log informational log entries */
	if (pinstance->ldn.hcam->notification_type !=
	    NOTIFICATION_TYPE_ERROR_LOG)
		return;

	if (pinstance->ldn.hcam->notification_lost ==
	    HOSTRCB_NOTIFICATIONS_LOST)
		dev_info(&pinstance->pdev->dev, "Error notifications lost\n");

	ioasc = le32_to_cpu(hcam_ldn->error_log.fd_ioasc);

	if (ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET ||
		ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER) {
		dev_info(&pinstance->pdev->dev,
			"UnitAttention due to IOA Bus Reset\n");
		scsi_report_bus_reset(
			pinstance->host,
			RES_BUS(hcam_ldn->error_log.fd_ra));
	}

	return;
}

Project: linux
File: pmcraid.c

static void pmcraid_identify_hrrq(struct pmcraid_cmd *cmd)
{
	struct pmcraid_instance *pinstance = cmd->drv_inst;
	struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
	int index = cmd->hrrq_index;
	__be64 hrrq_addr = cpu_to_be64(pinstance->hrrq_start_bus_addr[index]);
	u32 hrrq_size = cpu_to_be32(sizeof(u32) * PMCRAID_MAX_CMD);
	void (*done_function)(struct pmcraid_cmd *);

	pmcraid_reinit_cmdblk(cmd);
	cmd->hrrq_index = index + 1;

	if (cmd->hrrq_index < pinstance->num_hrrq) {
		done_function = pmcraid_identify_hrrq;
	} else {
		cmd->hrrq_index = 0;
		done_function = pmcraid_get_fwversion;
	}

	/* Initialize ioarcb */
	ioarcb->request_type = REQ_TYPE_IOACMD;
	ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);

	/* initialize the hrrq number where IOA will respond to this command */
	ioarcb->hrrq_id = index;
	ioarcb->cdb[0] = PMCRAID_IDENTIFY_HRRQ;
	ioarcb->cdb[1] = index;

	/* IOA expects 64-bit pci address to be written in B.E format
	 * (i.e cdb[2]=MSByte..cdb[9]=LSB.
	 */
	pmcraid_info("HRRQ_IDENTIFY with hrrq:ioarcb:index => %llx:%llx:%x\n",
		     hrrq_addr, ioarcb->ioarcb_bus_addr, index);

	memcpy(&(ioarcb->cdb[2]), &hrrq_addr, sizeof(hrrq_addr));
	memcpy(&(ioarcb->cdb[10]), &hrrq_size, sizeof(hrrq_size));

	/* Subsequent commands require HRRQ identification to be successful.
	 * Note that this gets called even during reset from SCSI mid-layer
	 * or tasklet
	 */
	pmcraid_send_cmd(cmd, done_function,
			 PMCRAID_INTERNAL_TIMEOUT,
			 pmcraid_timeout_handler);
}

Project: linux
File: pmcraid.c

static int __init pmcraid_init(void)
{
	dev_t dev;
	int error;

	pmcraid_info("%s Device Driver version: %s\n",
			 PMCRAID_DRIVER_NAME, PMCRAID_DRIVER_VERSION);

	error = alloc_chrdev_region(&dev, 0,
				    PMCRAID_MAX_ADAPTERS,
				    PMCRAID_DEVFILE);

	if (error) {
		pmcraid_err("failed to get a major number for adapters\n");
		goto out_init;
	}

	pmcraid_major = MAJOR(dev);
	pmcraid_class = class_create(THIS_MODULE, PMCRAID_DEVFILE);

	if (IS_ERR(pmcraid_class)) {
		error = PTR_ERR(pmcraid_class);
		pmcraid_err("failed to register with with sysfs, error = %x\n",
			    error);
		goto out_unreg_chrdev;
	}

	error = pmcraid_netlink_init();

	if (error)
		goto out_unreg_chrdev;

	error = pci_register_driver(&pmcraid_driver);

	if (error == 0)
		goto out_init;

	pmcraid_err("failed to register pmcraid driver, error = %x\n",
		     error);
	class_destroy(pmcraid_class);
	pmcraid_netlink_release();

out_unreg_chrdev:
	unregister_chrdev_region(MKDEV(pmcraid_major, 0), PMCRAID_MAX_ADAPTERS);

out_init:
	return error;
}

Project: linux
File: pmcraid.c

static int __devinit pmcraid_init_buffers(struct pmcraid_instance *pinstance)
{
	int i;

	if (pmcraid_allocate_host_rrqs(pinstance)) {
		pmcraid_err("couldn't allocate memory for %d host rrqs\n",
			     pinstance->num_hrrq);
		return -ENOMEM;
	}

	if (pmcraid_allocate_config_buffers(pinstance)) {
		pmcraid_err("couldn't allocate memory for config buffers\n");
		pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
		return -ENOMEM;
	}

	if (pmcraid_allocate_cmd_blocks(pinstance)) {
		pmcraid_err("couldn't allocate memory for cmd blocks\n");
		pmcraid_release_config_buffers(pinstance);
		pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
		return -ENOMEM;
	}

	if (pmcraid_allocate_control_blocks(pinstance)) {
		pmcraid_err("couldn't allocate memory control blocks\n");
		pmcraid_release_config_buffers(pinstance);
		pmcraid_release_cmd_blocks(pinstance, PMCRAID_MAX_CMD);
		pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
		return -ENOMEM;
	}

	/* allocate DMAable memory for page D0 INQUIRY buffer */
	pinstance->inq_data = pci_alloc_consistent(
					pinstance->pdev,
					sizeof(struct pmcraid_inquiry_data),
					&pinstance->inq_data_baddr);

	if (pinstance->inq_data == NULL) {
		pmcraid_err("couldn't allocate DMA memory for INQUIRY\n");
		pmcraid_release_buffers(pinstance);
		return -ENOMEM;
	}

	/* allocate DMAable memory for set timestamp data buffer */
	pinstance->timestamp_data = pci_alloc_consistent(
					pinstance->pdev,
					sizeof(struct pmcraid_timestamp_data),
					&pinstance->timestamp_data_baddr);

	if (pinstance->timestamp_data == NULL) {
		pmcraid_err("couldn't allocate DMA memory for \
				set time_stamp \n");
		pmcraid_release_buffers(pinstance);
		return -ENOMEM;
	}


	/* Initialize all the command blocks and add them to free pool. No
	 * need to lock (free_pool_lock) as this is done in initialization
	 * itself
	 */
	for (i = 0; i < PMCRAID_MAX_CMD; i++) {
		struct pmcraid_cmd *cmdp = pinstance->cmd_list[i];
		pmcraid_init_cmdblk(cmdp, i);
		cmdp->drv_inst = pinstance;
		list_add_tail(&cmdp->free_list, &pinstance->free_cmd_pool);
	}

	return 0;
}

Project: linux
File: pmcraid.c

void pmcraid_init_cmdblk(struct pmcraid_cmd *cmd, int index)
{
	struct pmcraid_ioarcb *ioarcb = &(cmd->ioa_cb->ioarcb);
	dma_addr_t dma_addr = cmd->ioa_cb_bus_addr;

	if (index >= 0) {
		/* first time initialization (called from  probe) */
		u32 ioasa_offset =
			offsetof(struct pmcraid_control_block, ioasa);

		cmd->index = index;
		ioarcb->response_handle = cpu_to_le32(index << 2);
		ioarcb->ioarcb_bus_addr = cpu_to_le64(dma_addr);
		ioarcb->ioasa_bus_addr = cpu_to_le64(dma_addr + ioasa_offset);
		ioarcb->ioasa_len = cpu_to_le16(sizeof(struct pmcraid_ioasa));
	} else {
		/* re-initialization of various lengths, called once command is
		 * processed by IOA
		 */
		memset(&cmd->ioa_cb->ioarcb.cdb, 0, PMCRAID_MAX_CDB_LEN);
		ioarcb->hrrq_id = 0;
		ioarcb->request_flags0 = 0;
		ioarcb->request_flags1 = 0;
		ioarcb->cmd_timeout = 0;
		ioarcb->ioarcb_bus_addr &= (~0x1FULL);
		ioarcb->ioadl_bus_addr = 0;
		ioarcb->ioadl_length = 0;
		ioarcb->data_transfer_length = 0;
		ioarcb->add_cmd_param_length = 0;
		ioarcb->add_cmd_param_offset = 0;
		cmd->ioa_cb->ioasa.ioasc = 0;
		cmd->ioa_cb->ioasa.residual_data_length = 0;
		cmd->time_left = 0;
	}

	cmd->cmd_done = NULL;
	cmd->scsi_cmd = NULL;
	cmd->release = 0;
	cmd->completion_req = 0;
	cmd->sense_buffer = 0;
	cmd->sense_buffer_dma = 0;
	cmd->dma_handle = 0;
	init_timer(&cmd->timer);
}

Project: linux
File: pmcraid.c

static struct pmcraid_cmd *pmcraid_init_hcam
(
	struct pmcraid_instance *pinstance,
	u8 type
)
{
	struct pmcraid_cmd *cmd;
	struct pmcraid_ioarcb *ioarcb;
	struct pmcraid_ioadl_desc *ioadl;
	struct pmcraid_hostrcb *hcam;
	void (*cmd_done) (struct pmcraid_cmd *);
	dma_addr_t dma;
	int rcb_size;

	cmd = pmcraid_get_free_cmd(pinstance);

	if (!cmd) {
		pmcraid_err("no free command blocks for hcam\n");
		return cmd;
	}

	if (type == PMCRAID_HCAM_CODE_CONFIG_CHANGE) {
		rcb_size = sizeof(struct pmcraid_hcam_ccn_ext);
		cmd_done = pmcraid_process_ccn;
		dma = pinstance->ccn.baddr + PMCRAID_AEN_HDR_SIZE;
		hcam = &pinstance->ccn;
	} else {
		rcb_size = sizeof(struct pmcraid_hcam_ldn);
		cmd_done = pmcraid_process_ldn;
		dma = pinstance->ldn.baddr + PMCRAID_AEN_HDR_SIZE;
		hcam = &pinstance->ldn;
	}

	/* initialize command pointer used for HCAM registration */
	hcam->cmd = cmd;

	ioarcb = &cmd->ioa_cb->ioarcb;
	ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
					offsetof(struct pmcraid_ioarcb,
						add_data.u.ioadl[0]));
	ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
	ioadl = ioarcb->add_data.u.ioadl;

	/* Initialize ioarcb */
	ioarcb->request_type = REQ_TYPE_HCAM;
	ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
	ioarcb->cdb[0] = PMCRAID_HOST_CONTROLLED_ASYNC;
	ioarcb->cdb[1] = type;
	ioarcb->cdb[7] = (rcb_size >> 8) & 0xFF;
	ioarcb->cdb[8] = (rcb_size) & 0xFF;

	ioarcb->data_transfer_length = cpu_to_le32(rcb_size);

	ioadl[0].flags |= IOADL_FLAGS_READ_LAST;
	ioadl[0].data_len = cpu_to_le32(rcb_size);
	ioadl[0].address = cpu_to_le32(dma);

	cmd->cmd_done = cmd_done;
	return cmd;
}

Project: linux
File: pmcraid.c

static int __devinit pmcraid_init_instance(
	struct pci_dev *pdev,
	struct Scsi_Host *host,
	void __iomem *mapped_pci_addr
)
{
	struct pmcraid_instance *pinstance =
		(struct pmcraid_instance *)host->hostdata;

	pinstance->host = host;
	pinstance->pdev = pdev;

	/* Initialize register addresses */
	pinstance->mapped_dma_addr = mapped_pci_addr;

	/* Initialize chip-specific details */
	{
		struct pmcraid_chip_details *chip_cfg = pinstance->chip_cfg;
		struct pmcraid_interrupts *pint_regs = &pinstance->int_regs;

		pinstance->ioarrin = mapped_pci_addr + chip_cfg->ioarrin;

		pint_regs->ioa_host_interrupt_reg =
			mapped_pci_addr + chip_cfg->ioa_host_intr;
		pint_regs->ioa_host_interrupt_clr_reg =
			mapped_pci_addr + chip_cfg->ioa_host_intr_clr;
		pint_regs->ioa_host_msix_interrupt_reg =
			mapped_pci_addr + chip_cfg->ioa_host_msix_intr;
		pint_regs->host_ioa_interrupt_reg =
			mapped_pci_addr + chip_cfg->host_ioa_intr;
		pint_regs->host_ioa_interrupt_clr_reg =
			mapped_pci_addr + chip_cfg->host_ioa_intr_clr;

		/* Current version of firmware exposes interrupt mask set
		 * and mask clr registers through memory mapped bar0.
		 */
		pinstance->mailbox = mapped_pci_addr + chip_cfg->mailbox;
		pinstance->ioa_status = mapped_pci_addr + chip_cfg->ioastatus;
		pint_regs->ioa_host_interrupt_mask_reg =
			mapped_pci_addr + chip_cfg->ioa_host_mask;
		pint_regs->ioa_host_interrupt_mask_clr_reg =
			mapped_pci_addr + chip_cfg->ioa_host_mask_clr;
		pint_regs->global_interrupt_mask_reg =
			mapped_pci_addr + chip_cfg->global_intr_mask;
	};

	pinstance->ioa_reset_attempts = 0;
	init_waitqueue_head(&pinstance->reset_wait_q);

	atomic_set(&pinstance->outstanding_cmds, 0);
	atomic_set(&pinstance->last_message_id, 0);
	atomic_set(&pinstance->expose_resources, 0);

	INIT_LIST_HEAD(&pinstance->free_res_q);
	INIT_LIST_HEAD(&pinstance->used_res_q);
	INIT_LIST_HEAD(&pinstance->free_cmd_pool);
	INIT_LIST_HEAD(&pinstance->pending_cmd_pool);

	spin_lock_init(&pinstance->free_pool_lock);
	spin_lock_init(&pinstance->pending_pool_lock);
	spin_lock_init(&pinstance->resource_lock);
	mutex_init(&pinstance->aen_queue_lock);

	/* Work-queue (Shared) for deferred processing error handling */
	INIT_WORK(&pinstance->worker_q, pmcraid_worker_function);

	/* Initialize the default log_level */
	pinstance->current_log_level = pmcraid_log_level;

	/* Setup variables required for reset engine */
	pinstance->ioa_state = IOA_STATE_UNKNOWN;
	pinstance->reset_cmd = NULL;
	return 0;
}

Project: linux
File: pmcraid.c

pmcraid_init_ioadls(struct pmcraid_cmd *cmd, int sgcount)
{
	struct pmcraid_ioadl_desc *ioadl;
	struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
	int ioadl_count = 0;

	if (ioarcb->add_cmd_param_length)
		ioadl_count = DIV_ROUND_UP(ioarcb->add_cmd_param_length, 16);
	ioarcb->ioadl_length =
		sizeof(struct pmcraid_ioadl_desc) * sgcount;

	if ((sgcount + ioadl_count) > (ARRAY_SIZE(ioarcb->add_data.u.ioadl))) {
		/* external ioadls start at offset 0x80 from control_block
		 * structure, re-using 24 out of 27 ioadls part of IOARCB.
		 * It is necessary to indicate to firmware that driver is
		 * using ioadls to be treated as external to IOARCB.
		 */
		ioarcb->ioarcb_bus_addr &= ~(0x1FULL);
		ioarcb->ioadl_bus_addr =
			cpu_to_le64((cmd->ioa_cb_bus_addr) +
				offsetof(struct pmcraid_ioarcb,
					add_data.u.ioadl[3]));
		ioadl = &ioarcb->add_data.u.ioadl[3];
	} else {
		ioarcb->ioadl_bus_addr =
			cpu_to_le64((cmd->ioa_cb_bus_addr) +
				offsetof(struct pmcraid_ioarcb,
					add_data.u.ioadl[ioadl_count]));

		ioadl = &ioarcb->add_data.u.ioadl[ioadl_count];
		ioarcb->ioarcb_bus_addr |=
				DIV_ROUND_CLOSEST(sgcount + ioadl_count, 8);
	}

	return ioadl;
}

Project: linux
File: pmcraid.c

static void pmcraid_init_res_table(struct pmcraid_cmd *cmd)
{
	struct pmcraid_instance *pinstance = cmd->drv_inst;
	struct pmcraid_resource_entry *res, *temp;
	struct pmcraid_config_table_entry *cfgte;
	unsigned long lock_flags;
	int found, rc, i;
	u16 fw_version;
	LIST_HEAD(old_res);

	if (pinstance->cfg_table->flags & MICROCODE_UPDATE_REQUIRED)
		pmcraid_err("IOA requires microcode download\n");

	fw_version = be16_to_cpu(pinstance->inq_data->fw_version);

	/* resource list is protected by pinstance->resource_lock.
	 * init_res_table can be called from probe (user-thread) or runtime
	 * reset (timer/tasklet)
	 */
	spin_lock_irqsave(&pinstance->resource_lock, lock_flags);

	list_for_each_entry_safe(res, temp, &pinstance->used_res_q, queue)
		list_move_tail(&res->queue, &old_res);

	for (i = 0; i < pinstance->cfg_table->num_entries; i++) {
		if (be16_to_cpu(pinstance->inq_data->fw_version) <=
						PMCRAID_FW_VERSION_1)
			cfgte = &pinstance->cfg_table->entries[i];
		else
			cfgte = (struct pmcraid_config_table_entry *)
					&pinstance->cfg_table->entries_ext[i];

		if (!pmcraid_expose_resource(fw_version, cfgte))
			continue;

		found = 0;

		/* If this entry was already detected and initialized */
		list_for_each_entry_safe(res, temp, &old_res, queue) {

			rc = memcmp(&res->cfg_entry.resource_address,
				    &cfgte->resource_address,
				    sizeof(cfgte->resource_address));
			if (!rc) {
				list_move_tail(&res->queue,
						&pinstance->used_res_q);
				found = 1;
				break;
			}
		}

		/* If this is new entry, initialize it and add it the queue */
		if (!found) {

			if (list_empty(&pinstance->free_res_q)) {
				pmcraid_err("Too many devices attached\n");
				break;
			}

			found = 1;
			res = list_entry(pinstance->free_res_q.next,
					 struct pmcraid_resource_entry, queue);

			res->scsi_dev = NULL;
			res->change_detected = RES_CHANGE_ADD;
			res->reset_progress = 0;
			list_move_tail(&res->queue, &pinstance->used_res_q);
		}

		/* copy new configuration table entry details into driver
		 * maintained resource entry
		 */
		if (found) {
			memcpy(&res->cfg_entry, cfgte,
					pinstance->config_table_entry_size);
			pmcraid_info("New res type:%x, vset:%x, addr:%x:\n",
				 res->cfg_entry.resource_type,
				 (fw_version <= PMCRAID_FW_VERSION_1 ?
					res->cfg_entry.unique_flags1 :
						res->cfg_entry.array_id & 0xFF),
				 le32_to_cpu(res->cfg_entry.resource_address));
		}
	}

	/* Detect any deleted entries, mark them for deletion from mid-layer */
	list_for_each_entry_safe(res, temp, &old_res, queue) {

		if (res->scsi_dev) {
			res->change_detected = RES_CHANGE_DEL;
			res->cfg_entry.resource_handle =
				PMCRAID_INVALID_RES_HANDLE;
			list_move_tail(&res->queue, &pinstance->used_res_q);
		} else {
			list_move_tail(&res->queue, &pinstance->free_res_q);
		}
	}

	/* release the resource list lock */
	spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
	pmcraid_set_timestamp(cmd);
}

Project: linux
File: pmcraid.c

static void pmcraid_init_tasklets(struct pmcraid_instance *pinstance)
{
	int i;
	for (i = 0; i < pinstance->num_hrrq; i++)
		tasklet_init(&pinstance->isr_tasklet[i],
			     pmcraid_tasklet_function,
			     (unsigned long)&pinstance->hrrq_vector[i]);
}

Project: linux
File: pmcraid.c

static void pmcraid_initiate_reset(struct pmcraid_instance *pinstance)
{
	struct pmcraid_cmd *cmd;

	/* If the reset is already in progress, just return, otherwise start
	 * reset sequence and return
	 */
	if (!pinstance->ioa_reset_in_progress) {
		scsi_block_requests(pinstance->host);
		cmd = pmcraid_get_free_cmd(pinstance);

		if (cmd == NULL) {
			pmcraid_err("no cmnd blocks for initiate_reset\n");
			return;
		}

		pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
		pinstance->reset_cmd = cmd;
		pinstance->force_ioa_reset = 1;
		pmcraid_notify_ioastate(pinstance,
					PMC_DEVICE_EVENT_RESET_START);
		pmcraid_ioa_reset(cmd);
	}
}

Project: linux
File: pmcraid.c

static void pmcraid_internal_done(struct pmcraid_cmd *cmd)
{
	pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n",
		     cmd->ioa_cb->ioarcb.cdb[0],
		     le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));

	/* Some of the internal commands are sent with callers blocking for the
	 * response. Same will be indicated as part of cmd->completion_req
	 * field. Response path needs to wake up any waiters waiting for cmd
	 * completion if this flag is set.
	 */
	if (cmd->completion_req) {
		cmd->completion_req = 0;
		complete(&cmd->wait_for_completion);
	}

	/* most of the internal commands are completed by caller itself, so
	 * no need to return the command block back to free pool until we are
	 * required to do so (e.g once done with initialization).
	 */
	if (cmd->release) {
		cmd->release = 0;
		pmcraid_return_cmd(cmd);
	}
}

Project: linux
File: pmcraid.c

static void pmcraid_io_done(struct pmcraid_cmd *cmd)
{
	u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
	u32 reslen = le32_to_cpu(cmd->ioa_cb->ioasa.residual_data_length);

	if (_pmcraid_io_done(cmd, reslen, ioasc) == 0)
		pmcraid_return_cmd(cmd);
}

Project: linux
File: pmcraid.c

static void pmcraid_ioa_reset(struct pmcraid_cmd *cmd)
{
	struct pmcraid_instance *pinstance = cmd->drv_inst;
	u8 reset_complete = 0;

	pinstance->ioa_reset_in_progress = 1;

	if (pinstance->reset_cmd != cmd) {
		pmcraid_err("reset is called with different command block\n");
		pinstance->reset_cmd = cmd;
	}

	pmcraid_info("reset_engine: state = %d, command = %p\n",
		      pinstance->ioa_state, cmd);

	switch (pinstance->ioa_state) {

	case IOA_STATE_DEAD:
		/* If IOA is offline, whatever may be the reset reason, just
		 * return. callers might be waiting on the reset wait_q, wake
		 * up them
		 */
		pmcraid_err("IOA is offline no reset is possible\n");
		reset_complete = 1;
		break;

	case IOA_STATE_IN_BRINGDOWN:
		/* we enter here, once ioa shutdown command is processed by IOA
		 * Alert IOA for a possible reset. If reset alert fails, IOA
		 * goes through hard-reset
		 */
		pmcraid_disable_interrupts(pinstance, ~0);
		pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
		pmcraid_reset_alert(cmd);
		break;

	case IOA_STATE_UNKNOWN:
		/* We may be called during probe or resume. Some pre-processing
		 * is required for prior to reset
		 */
		scsi_block_requests(pinstance->host);

		/* If asked to reset while IOA was processing responses or
		 * there are any error responses then IOA may require
		 * hard-reset.
		 */
		if (pinstance->ioa_hard_reset == 0) {
			if (ioread32(pinstance->ioa_status) &
			    INTRS_TRANSITION_TO_OPERATIONAL) {
				pmcraid_info("sticky bit set, bring-up\n");
				pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
				pmcraid_reinit_cmdblk(cmd);
				pmcraid_identify_hrrq(cmd);
			} else {
				pinstance->ioa_state = IOA_STATE_IN_SOFT_RESET;
				pmcraid_soft_reset(cmd);
			}
		} else {
			/* Alert IOA of a possible reset and wait for critical
			 * operation in progress bit to reset
			 */
			pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
			pmcraid_reset_alert(cmd);
		}
		break;

	case IOA_STATE_IN_RESET_ALERT:
		/* If critical operation in progress bit is reset or wait gets
		 * timed out, reset proceeds with starting BIST on the IOA.
		 * pmcraid_ioa_hard_reset keeps a count of reset attempts. If
		 * they are 3 or more, reset engine marks IOA dead and returns
		 */
		pinstance->ioa_state = IOA_STATE_IN_HARD_RESET;
		pmcraid_start_bist(cmd);
		break;

	case IOA_STATE_IN_HARD_RESET:
		pinstance->ioa_reset_attempts++;

		/* retry reset if we haven't reached maximum allowed limit */
		if (pinstance->ioa_reset_attempts > PMCRAID_RESET_ATTEMPTS) {
			pinstance->ioa_reset_attempts = 0;
			pmcraid_err("IOA didn't respond marking it as dead\n");
			pinstance->ioa_state = IOA_STATE_DEAD;

			if (pinstance->ioa_bringdown)
				pmcraid_notify_ioastate(pinstance,
					PMC_DEVICE_EVENT_SHUTDOWN_FAILED);
			else
				pmcraid_notify_ioastate(pinstance,
						PMC_DEVICE_EVENT_RESET_FAILED);
			reset_complete = 1;
			break;
		}

		/* Once either bist or pci reset is done, restore PCI config
		 * space. If this fails, proceed with hard reset again
		 */
		pci_restore_state(pinstance->pdev);

		/* fail all pending commands */
		pmcraid_fail_outstanding_cmds(pinstance);

		/* check if unit check is active, if so extract dump */
		if (pinstance->ioa_unit_check) {
			pmcraid_info("unit check is active\n");
			pinstance->ioa_unit_check = 0;
			pmcraid_get_dump(pinstance);
			pinstance->ioa_reset_attempts--;
			pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
			pmcraid_reset_alert(cmd);
			break;
		}

		/* if the reset reason is to bring-down the ioa, we might be
		 * done with the reset restore pci_config_space and complete
		 * the reset
		 */
		if (pinstance->ioa_bringdown) {
			pmcraid_info("bringing down the adapter\n");
			pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
			pinstance->ioa_bringdown = 0;
			pinstance->ioa_state = IOA_STATE_UNKNOWN;
			pmcraid_notify_ioastate(pinstance,
					PMC_DEVICE_EVENT_SHUTDOWN_SUCCESS);
			reset_complete = 1;
		} else {
			/* bring-up IOA, so proceed with soft reset
			 * Reinitialize hrrq_buffers and their indices also
			 * enable interrupts after a pci_restore_state
			 */
			if (pmcraid_reset_enable_ioa(pinstance)) {
				pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
				pmcraid_info("bringing up the adapter\n");
				pmcraid_reinit_cmdblk(cmd);
				pmcraid_identify_hrrq(cmd);
			} else {
				pinstance->ioa_state = IOA_STATE_IN_SOFT_RESET;
				pmcraid_soft_reset(cmd);
			}
		}
		break;

	case IOA_STATE_IN_SOFT_RESET:
		/* TRANSITION TO OPERATIONAL is on so start initialization
		 * sequence
		 */
		pmcraid_info("In softreset proceeding with bring-up\n");
		pinstance->ioa_state = IOA_STATE_IN_BRINGUP;

		/* Initialization commands start with HRRQ identification. From
		 * now on tasklet completes most of the commands as IOA is up
		 * and intrs are enabled
		 */
		pmcraid_identify_hrrq(cmd);
		break;

	case IOA_STATE_IN_BRINGUP:
		/* we are done with bringing up of IOA, change the ioa_state to
		 * operational and wake up any waiters
		 */
		pinstance->ioa_state = IOA_STATE_OPERATIONAL;
		reset_complete = 1;
		break;

	case IOA_STATE_OPERATIONAL:
	default:
		/* When IOA is operational and a reset is requested, check for
		 * the reset reason. If reset is to bring down IOA, unregister
		 * HCAMs and initiate shutdown; if adapter reset is forced then
		 * restart reset sequence again
		 */
		if (pinstance->ioa_shutdown_type == SHUTDOWN_NONE &&
		    pinstance->force_ioa_reset == 0) {
			pmcraid_notify_ioastate(pinstance,
						PMC_DEVICE_EVENT_RESET_SUCCESS);
			reset_complete = 1;
		} else {
			if (pinstance->ioa_shutdown_type != SHUTDOWN_NONE)
				pinstance->ioa_state = IOA_STATE_IN_BRINGDOWN;
			pmcraid_reinit_cmdblk(cmd);
			pmcraid_unregister_hcams(cmd);
		}
		break;
	}

	/* reset will be completed if ioa_state is either DEAD or UNKNOWN or
	 * OPERATIONAL. Reset all control variables used during reset, wake up
	 * any waiting threads and let the SCSI mid-layer send commands. Note
	 * that host_lock must be held before invoking scsi_report_bus_reset.
	 */
	if (reset_complete) {
		pinstance->ioa_reset_in_progress = 0;
		pinstance->ioa_reset_attempts = 0;
		pinstance->reset_cmd = NULL;
		pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
		pinstance->ioa_bringdown = 0;
		pmcraid_return_cmd(cmd);

		/* If target state is to bring up the adapter, proceed with
		 * hcam registration and resource exposure to mid-layer.
		 */
		if (pinstance->ioa_state == IOA_STATE_OPERATIONAL)
			pmcraid_register_hcams(pinstance);

		wake_up_all(&pinstance->reset_wait_q);
	}

	return;
}

Project: linux
File: pmcraid.c

static void pmcraid_ioa_shutdown_done(struct pmcraid_cmd *cmd)
{
	struct pmcraid_instance *pinstance = cmd->drv_inst;
	unsigned long lock_flags;

	spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
	pmcraid_ioa_reset(cmd);
	spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
}

Project: linux
File: pmcraid.c

static long pmcraid_ioctl_driver(
	struct pmcraid_instance *pinstance,
	unsigned int cmd,
	unsigned int buflen,
	void __user *user_buffer
)
{
	int rc = -ENOSYS;

	if (!access_ok(VERIFY_READ, user_buffer, _IOC_SIZE(cmd))) {
		pmcraid_err("ioctl_driver: access fault in request buffer\n");
		return -EFAULT;
	}

	switch (cmd) {
	case PMCRAID_IOCTL_RESET_ADAPTER:
		pmcraid_reset_bringup(pinstance);
		rc = 0;
		break;

	default:
		break;
	}

	return rc;
}

Project: linux
File: pmcraid.c

static irqreturn_t pmcraid_isr(int irq, void *dev_id)
{
	struct pmcraid_isr_param *hrrq_vector;
	struct pmcraid_instance *pinstance;
	u32 intrs;
	unsigned long lock_flags;
	int hrrq_id = 0;

	/* In case of legacy interrupt mode where interrupts are shared across
	 * isrs, it may be possible that the current interrupt is not from IOA
	 */
	if (!dev_id) {
		printk(KERN_INFO "%s(): NULL host pointer\n", __func__);
		return IRQ_NONE;
	}
	hrrq_vector = (struct pmcraid_isr_param *)dev_id;
	pinstance = hrrq_vector->drv_inst;

	intrs = pmcraid_read_interrupts(pinstance);

	if (unlikely((intrs & PMCRAID_PCI_INTERRUPTS) == 0))
		return IRQ_NONE;

	/* Any error interrupts including unit_check, initiate IOA reset.
	 * In case of unit check indicate to reset_sequence that IOA unit
	 * checked and prepare for a dump during reset sequence
	 */
	if (intrs & PMCRAID_ERROR_INTERRUPTS) {

		if (intrs & INTRS_IOA_UNIT_CHECK)
			pinstance->ioa_unit_check = 1;

		iowrite32(intrs,
			  pinstance->int_regs.ioa_host_interrupt_clr_reg);
		pmcraid_err("ISR: error interrupts: %x initiating reset\n",
			    intrs);
		intrs = ioread32(
				pinstance->int_regs.ioa_host_interrupt_clr_reg);
		spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
		pmcraid_initiate_reset(pinstance);
		spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
	} else {
		/* If interrupt was as part of the ioa initialization,
		 * clear. Delete the timer and wakeup the
		 * reset engine to proceed with reset sequence
		 */
		if (intrs & INTRS_TRANSITION_TO_OPERATIONAL) {
			pmcraid_clr_trans_op(pinstance);
		} else {
			iowrite32(intrs,
				pinstance->int_regs.ioa_host_interrupt_clr_reg);
			ioread32(
				pinstance->int_regs.ioa_host_interrupt_clr_reg);

			tasklet_schedule(
					&(pinstance->isr_tasklet[hrrq_id]));
		}
	}

	return IRQ_HANDLED;
}

Project: linux
File: pmcraid.c

static irqreturn_t pmcraid_isr_msix(int irq, void *dev_id)
{
	struct pmcraid_isr_param *hrrq_vector;
	struct pmcraid_instance *pinstance;
	unsigned long lock_flags;
	u32 intrs_val;
	int hrrq_id;

	hrrq_vector = (struct pmcraid_isr_param *)dev_id;
	hrrq_id = hrrq_vector->hrrq_id;
	pinstance = hrrq_vector->drv_inst;

	if (!hrrq_id) {
		/* Read the interrupt */
		intrs_val = pmcraid_read_interrupts(pinstance);
		if (intrs_val &&
			((ioread32(pinstance->int_regs.host_ioa_interrupt_reg)
			& DOORBELL_INTR_MSIX_CLR) == 0)) {
			/* Any error interrupts including unit_check,
			 * initiate IOA reset.In case of unit check indicate
			 * to reset_sequence that IOA unit checked and prepare
			 * for a dump during reset sequence
			 */
			if (intrs_val & PMCRAID_ERROR_INTERRUPTS) {
				if (intrs_val & INTRS_IOA_UNIT_CHECK)
					pinstance->ioa_unit_check = 1;

				pmcraid_err("ISR: error interrupts: %x \
					initiating reset\n", intrs_val);
				spin_lock_irqsave(pinstance->host->host_lock,
					lock_flags);
				pmcraid_initiate_reset(pinstance);
				spin_unlock_irqrestore(
					pinstance->host->host_lock,
					lock_flags);
			}
			/* If interrupt was as part of the ioa initialization,
			 * clear it. Delete the timer and wakeup the
			 * reset engine to proceed with reset sequence
			 */
			if (intrs_val & INTRS_TRANSITION_TO_OPERATIONAL)
				pmcraid_clr_trans_op(pinstance);

			/* Clear the interrupt register by writing
			 * to host to ioa doorbell. Once done
			 * FW will clear the interrupt.
			 */
			iowrite32(DOORBELL_INTR_MSIX_CLR,
				pinstance->int_regs.host_ioa_interrupt_reg);
			ioread32(pinstance->int_regs.host_ioa_interrupt_reg);


		}
	}

	tasklet_schedule(&(pinstance->isr_tasklet[hrrq_id]));

	return IRQ_HANDLED;
}

Project: linux
File: pmcraid.c

static void pmcraid_kill_tasklets(struct pmcraid_instance *pinstance)
{
	int i;
	for (i = 0; i < pinstance->num_hrrq; i++)
		tasklet_kill(&pinstance->isr_tasklet[i]);
}

Project: linux
File: pmcraid.c

static int pmcraid_netlink_init(void)
{
	int result;

	result = genl_register_family(&pmcraid_event_family);

	if (result)
		return result;

	pmcraid_info("registered NETLINK GENERIC group: %d\n",
		     pmcraid_event_family.id);

	return result;
}

Project: linux
File: pmcraid.c

static void pmcraid_notify_ioastate(struct pmcraid_instance *pinstance, u32 evt)
{
	pinstance->scn.ioa_state = evt;
	pmcraid_notify_aen(pinstance,
			  &pinstance->scn.msg,
			  sizeof(u32));
}

Project: linux
File: pmcraid.c

static int pmcraid_notify_ldn(struct pmcraid_instance *pinstance)
{
	return pmcraid_notify_aen(pinstance,
				pinstance->ldn.msg,
				pinstance->ldn.hcam->data_len +
				sizeof(struct pmcraid_hcam_hdr));
}

Project: linux
File: pmcraid.c

static void pmcraid_prepare_cancel_cmd(
	struct pmcraid_cmd *cmd,
	struct pmcraid_cmd *cmd_to_cancel
)
{
	struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
	__be64 ioarcb_addr = cmd_to_cancel->ioa_cb->ioarcb.ioarcb_bus_addr;

	/* Get the resource handle to where the command to be aborted has been
	 * sent.
	 */
	ioarcb->resource_handle = cmd_to_cancel->ioa_cb->ioarcb.resource_handle;
	ioarcb->request_type = REQ_TYPE_IOACMD;
	memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
	ioarcb->cdb[0] = PMCRAID_ABORT_CMD;

	/* IOARCB address of the command to be cancelled is given in
	 * cdb[2]..cdb[9] is Big-Endian format. Note that length bits in
	 * IOARCB address are not masked.
	 */
	ioarcb_addr = cpu_to_be64(ioarcb_addr);
	memcpy(&(ioarcb->cdb[2]), &ioarcb_addr, sizeof(ioarcb_addr));
}

Project: linux
File: pmcraid.c

static int __devinit pmcraid_probe(
	struct pci_dev *pdev,
	const struct pci_device_id *dev_id
)
{
	struct pmcraid_instance *pinstance;
	struct Scsi_Host *host;
	void __iomem *mapped_pci_addr;
	int rc = PCIBIOS_SUCCESSFUL;

	if (atomic_read(&pmcraid_adapter_count) >= PMCRAID_MAX_ADAPTERS) {
		pmcraid_err
			("maximum number(%d) of supported adapters reached\n",
			 atomic_read(&pmcraid_adapter_count));
		return -ENOMEM;
	}

	atomic_inc(&pmcraid_adapter_count);
	rc = pci_enable_device(pdev);

	if (rc) {
		dev_err(&pdev->dev, "Cannot enable adapter\n");
		atomic_dec(&pmcraid_adapter_count);
		return rc;
	}

	dev_info(&pdev->dev,
		"Found new IOA(%x:%x), Total IOA count: %d\n",
		 pdev->vendor, pdev->device,
		 atomic_read(&pmcraid_adapter_count));

	rc = pci_request_regions(pdev, PMCRAID_DRIVER_NAME);

	if (rc < 0) {
		dev_err(&pdev->dev,
			"Couldn't register memory range of registers\n");
		goto out_disable_device;
	}

	mapped_pci_addr = pci_iomap(pdev, 0, 0);

	if (!mapped_pci_addr) {
		dev_err(&pdev->dev, "Couldn't map PCI registers memory\n");
		rc = -ENOMEM;
		goto out_release_regions;
	}

	pci_set_master(pdev);

	/* Firmware requires the system bus address of IOARCB to be within
	 * 32-bit addressable range though it has 64-bit IOARRIN register.
	 * However, firmware supports 64-bit streaming DMA buffers, whereas
	 * coherent buffers are to be 32-bit. Since pci_alloc_consistent always
	 * returns memory within 4GB (if not, change this logic), coherent
	 * buffers are within firmware acceptable address ranges.
	 */
	if ((sizeof(dma_addr_t) == 4) ||
	    pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
		rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));

	/* firmware expects 32-bit DMA addresses for IOARRIN register; set 32
	 * bit mask for pci_alloc_consistent to return addresses within 4GB
	 */
	if (rc == 0)
		rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));

	if (rc != 0) {
		dev_err(&pdev->dev, "Failed to set PCI DMA mask\n");
		goto cleanup_nomem;
	}

	host = scsi_host_alloc(&pmcraid_host_template,
				sizeof(struct pmcraid_instance));

	if (!host) {
		dev_err(&pdev->dev, "scsi_host_alloc failed!\n");
		rc = -ENOMEM;
		goto cleanup_nomem;
	}

	host->max_id = PMCRAID_MAX_NUM_TARGETS_PER_BUS;
	host->max_lun = PMCRAID_MAX_NUM_LUNS_PER_TARGET;
	host->unique_id = host->host_no;
	host->max_channel = PMCRAID_MAX_BUS_TO_SCAN;
	host->max_cmd_len = PMCRAID_MAX_CDB_LEN;

	/* zero out entire instance structure */
	pinstance = (struct pmcraid_instance *)host->hostdata;
	memset(pinstance, 0, sizeof(*pinstance));

	pinstance->chip_cfg =
		(struct pmcraid_chip_details *)(dev_id->driver_data);

	rc = pmcraid_init_instance(pdev, host, mapped_pci_addr);

	if (rc < 0) {
		dev_err(&pdev->dev, "failed to initialize adapter instance\n");
		goto out_scsi_host_put;
	}

	pci_set_drvdata(pdev, pinstance);

	/* Save PCI config-space for use following the reset */
	rc = pci_save_state(pinstance->pdev);

	if (rc != 0) {
		dev_err(&pdev->dev, "Failed to save PCI config space\n");
		goto out_scsi_host_put;
	}

	pmcraid_disable_interrupts(pinstance, ~0);

	rc = pmcraid_register_interrupt_handler(pinstance);

	if (rc) {
		dev_err(&pdev->dev, "couldn't register interrupt handler\n");
		goto out_scsi_host_put;
	}

	pmcraid_init_tasklets(pinstance);

	/* allocate verious buffers used by LLD.*/
	rc = pmcraid_init_buffers(pinstance);

	if (rc) {
		pmcraid_err("couldn't allocate memory blocks\n");
		goto out_unregister_isr;
	}

	/* check the reset type required */
	pmcraid_reset_type(pinstance);

	pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);

	/* Start IOA firmware initialization and bring card to Operational
	 * state.
	 */
	pmcraid_info("starting IOA initialization sequence\n");
	if (pmcraid_reset_bringup(pinstance)) {
		dev_err(&pdev->dev, "couldn't initialize IOA\n");
		rc = 1;
		goto out_release_bufs;
	}

	/* Add adapter instance into mid-layer list */
	rc = scsi_add_host(pinstance->host, &pdev->dev);
	if (rc != 0) {
		pmcraid_err("couldn't add host into mid-layer: %d\n", rc);
		goto out_release_bufs;
	}

	scsi_scan_host(pinstance->host);

	rc = pmcraid_setup_chrdev(pinstance);

	if (rc != 0) {
		pmcraid_err("couldn't create mgmt interface, error: %x\n",
			     rc);
		goto out_remove_host;
	}

	/* Schedule worker thread to handle CCN and take care of adding and
	 * removing devices to OS
	 */
	atomic_set(&pinstance->expose_resources, 1);
	schedule_work(&pinstance->worker_q);
	return rc;

out_remove_host:
	scsi_remove_host(host);

out_release_bufs:
	pmcraid_release_buffers(pinstance);

out_unregister_isr:
	pmcraid_kill_tasklets(pinstance);
	pmcraid_unregister_interrupt_handler(pinstance);

out_scsi_host_put:
	scsi_host_put(host);

cleanup_nomem:
	iounmap(mapped_pci_addr);

out_release_regions:
	pci_release_regions(pdev);

out_disable_device:
	atomic_dec(&pmcraid_adapter_count);
	pci_set_drvdata(pdev, NULL);
	pci_disable_device(pdev);
	return -ENODEV;
}

Project: linux
File: pmcraid.c

static void pmcraid_process_ccn(struct pmcraid_cmd *cmd)
{
	struct pmcraid_instance *pinstance = cmd->drv_inst;
	u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
	unsigned long lock_flags;

	pinstance->ccn.cmd = NULL;
	pmcraid_return_cmd(cmd);

	/* If driver initiated IOA reset happened while this hcam was pending
	 * with IOA, or IOA bringdown sequence is in progress, no need to
	 * re-register the hcam
	 */
	if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET ||
	    atomic_read(&pinstance->ccn.ignore) == 1) {
		return;
	} else if (ioasc) {
		dev_info(&pinstance->pdev->dev,
			"Host RCB (CCN) failed with IOASC: 0x%08X\n", ioasc);
		spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
		pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
		spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
	} else {
		pmcraid_handle_config_change(pinstance);
	}
}

Project: linux
File: pmcraid.c

static void pmcraid_process_ldn(struct pmcraid_cmd *cmd)
{
	struct pmcraid_instance *pinstance = cmd->drv_inst;
	struct pmcraid_hcam_ldn *ldn_hcam =
			(struct pmcraid_hcam_ldn *)pinstance->ldn.hcam;
	u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
	u32 fd_ioasc = le32_to_cpu(ldn_hcam->error_log.fd_ioasc);
	unsigned long lock_flags;

	/* return the command block back to freepool */
	pinstance->ldn.cmd = NULL;
	pmcraid_return_cmd(cmd);

	/* If driver initiated IOA reset happened while this hcam was pending
	 * with IOA, no need to re-register the hcam as reset engine will do it
	 * once reset sequence is complete
	 */
	if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET ||
	    atomic_read(&pinstance->ccn.ignore) == 1) {
		return;
	} else if (!ioasc) {
		pmcraid_handle_error_log(pinstance);
		if (fd_ioasc == PMCRAID_IOASC_NR_IOA_RESET_REQUIRED) {
			spin_lock_irqsave(pinstance->host->host_lock,
					  lock_flags);
			pmcraid_initiate_reset(pinstance);
			spin_unlock_irqrestore(pinstance->host->host_lock,
					       lock_flags);
			return;
		}
		if (fd_ioasc == PMCRAID_IOASC_TIME_STAMP_OUT_OF_SYNC) {
			pinstance->timestamp_error = 1;
			pmcraid_set_timestamp(cmd);
		}
	} else {
		dev_info(&pinstance->pdev->dev,
			"Host RCB(LDN) failed with IOASC: 0x%08X\n", ioasc);
	}
	/* send netlink message for HCAM notification if enabled */
	if (!pmcraid_disable_aen)
		pmcraid_notify_ldn(pinstance);

	cmd = pmcraid_init_hcam(pinstance, PMCRAID_HCAM_CODE_LOG_DATA);
	if (cmd)
		pmcraid_send_hcam_cmd(cmd);
}

Project: linux
File: pmcraid.c

static void pmcraid_querycfg(struct pmcraid_cmd *cmd)
{
	struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
	struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
	struct pmcraid_instance *pinstance = cmd->drv_inst;
	int cfg_table_size = cpu_to_be32(sizeof(struct pmcraid_config_table));

	if (be16_to_cpu(pinstance->inq_data->fw_version) <=
					PMCRAID_FW_VERSION_1)
		pinstance->config_table_entry_size =
			sizeof(struct pmcraid_config_table_entry);
	else
		pinstance->config_table_entry_size =
			sizeof(struct pmcraid_config_table_entry_ext);

	ioarcb->request_type = REQ_TYPE_IOACMD;
	ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);

	ioarcb->cdb[0] = PMCRAID_QUERY_IOA_CONFIG;

	/* firmware requires 4-byte length field, specified in B.E format */
	memcpy(&(ioarcb->cdb[10]), &cfg_table_size, sizeof(cfg_table_size));

	/* Since entire config table can be described by single IOADL, it can
	 * be part of IOARCB itself
	 */
	ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
					offsetof(struct pmcraid_ioarcb,
						add_data.u.ioadl[0]));
	ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
	ioarcb->ioarcb_bus_addr &= ~(0x1FULL);

	ioarcb->request_flags0 |= NO_LINK_DESCS;
	ioarcb->data_transfer_length =
		cpu_to_le32(sizeof(struct pmcraid_config_table));

	ioadl = &(ioarcb->add_data.u.ioadl[0]);
	ioadl->flags = IOADL_FLAGS_LAST_DESC;
	ioadl->address = cpu_to_le64(pinstance->cfg_table_bus_addr);
	ioadl->data_len = cpu_to_le32(sizeof(struct pmcraid_config_table));

	pmcraid_send_cmd(cmd, pmcraid_init_res_table,
			 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
}

Project: linux
File: pmcraid.c

static int pmcraid_queuecommand_lck(
	struct scsi_cmnd *scsi_cmd,
	void (*done) (struct scsi_cmnd *)
)
{
	struct pmcraid_instance *pinstance;
	struct pmcraid_resource_entry *res;
	struct pmcraid_ioarcb *ioarcb;
	struct pmcraid_cmd *cmd;
	u32 fw_version;
	int rc = 0;

	pinstance =
		(struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
	fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
	scsi_cmd->scsi_done = done;
	res = scsi_cmd->device->hostdata;
	scsi_cmd->result = (DID_OK << 16);

	/* if adapter is marked as dead, set result to DID_NO_CONNECT complete
	 * the command
	 */
	if (pinstance->ioa_state == IOA_STATE_DEAD) {
		pmcraid_info("IOA is dead, but queuecommand is scheduled\n");
		scsi_cmd->result = (DID_NO_CONNECT << 16);
		scsi_cmd->scsi_done(scsi_cmd);
		return 0;
	}

	/* If IOA reset is in progress, can't queue the commands */
	if (pinstance->ioa_reset_in_progress)
		return SCSI_MLQUEUE_HOST_BUSY;

	/* Firmware doesn't support SYNCHRONIZE_CACHE command (0x35), complete
	 * the command here itself with success return
	 */
	if (scsi_cmd->cmnd[0] == SYNCHRONIZE_CACHE) {
		pmcraid_info("SYNC_CACHE(0x35), completing in driver itself\n");
		scsi_cmd->scsi_done(scsi_cmd);
		return 0;
	}

	/* initialize the command and IOARCB to be sent to IOA */
	cmd = pmcraid_get_free_cmd(pinstance);

	if (cmd == NULL) {
		pmcraid_err("free command block is not available\n");
		return SCSI_MLQUEUE_HOST_BUSY;
	}

	cmd->scsi_cmd = scsi_cmd;
	ioarcb = &(cmd->ioa_cb->ioarcb);
	memcpy(ioarcb->cdb, scsi_cmd->cmnd, scsi_cmd->cmd_len);
	ioarcb->resource_handle = res->cfg_entry.resource_handle;
	ioarcb->request_type = REQ_TYPE_SCSI;

	/* set hrrq number where the IOA should respond to. Note that all cmds
	 * generated internally uses hrrq_id 0, exception to this is the cmd
	 * block of scsi_cmd which is re-used (e.g. cancel/abort), which uses
	 * hrrq_id assigned here in queuecommand
	 */
	ioarcb->hrrq_id = atomic_add_return(1, &(pinstance->last_message_id)) %
			  pinstance->num_hrrq;
	cmd->cmd_done = pmcraid_io_done;

	if (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry)) {
		if (scsi_cmd->underflow == 0)
			ioarcb->request_flags0 |= INHIBIT_UL_CHECK;

		if (res->sync_reqd) {
			ioarcb->request_flags0 |= SYNC_COMPLETE;
			res->sync_reqd = 0;
		}

		ioarcb->request_flags0 |= NO_LINK_DESCS;
		ioarcb->request_flags1 |= pmcraid_task_attributes(scsi_cmd);

		if (RES_IS_GSCSI(res->cfg_entry))
			ioarcb->request_flags1 |= DELAY_AFTER_RESET;
	}

	rc = pmcraid_build_ioadl(pinstance, cmd);

	pmcraid_info("command (%d) CDB[0] = %x for %x:%x:%x:%x\n",
		     le32_to_cpu(ioarcb->response_handle) >> 2,
		     scsi_cmd->cmnd[0], pinstance->host->unique_id,
		     RES_IS_VSET(res->cfg_entry) ? PMCRAID_VSET_BUS_ID :
			PMCRAID_PHYS_BUS_ID,
		     RES_IS_VSET(res->cfg_entry) ?
			(fw_version <= PMCRAID_FW_VERSION_1 ?
				res->cfg_entry.unique_flags1 :
					res->cfg_entry.array_id & 0xFF) :
			RES_TARGET(res->cfg_entry.resource_address),
		     RES_LUN(res->cfg_entry.resource_address));

	if (likely(rc == 0)) {
		_pmcraid_fire_command(cmd);
	} else {
		pmcraid_err("queuecommand could not build ioadl\n");
		pmcraid_return_cmd(cmd);
		rc = SCSI_MLQUEUE_HOST_BUSY;
	}

	return rc;
}

Project: linux
File: pmcraid.c

static u32 pmcraid_read_interrupts(struct pmcraid_instance *pinstance)
{
	return (pinstance->interrupt_mode) ?
		ioread32(pinstance->int_regs.ioa_host_msix_interrupt_reg) :
		ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
}

Project: linux
File: pmcraid.c

static void pmcraid_register_hcams(struct pmcraid_instance *pinstance)
{
	pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
	pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_LOG_DATA);
}

Project: linux
File: pmcraid.c

pmcraid_register_interrupt_handler(struct pmcraid_instance *pinstance)
{
	int rc;
	struct pci_dev *pdev = pinstance->pdev;

	if ((pmcraid_enable_msix) &&
		(pci_find_capability(pdev, PCI_CAP_ID_MSIX))) {
		int num_hrrq = PMCRAID_NUM_MSIX_VECTORS;
		struct msix_entry entries[PMCRAID_NUM_MSIX_VECTORS];
		int i;
		for (i = 0; i < PMCRAID_NUM_MSIX_VECTORS; i++)
			entries[i].entry = i;

		rc = pci_enable_msix(pdev, entries, num_hrrq);
		if (rc < 0)
			goto pmcraid_isr_legacy;

		/* Check how many MSIX vectors are allocated and register
		 * msi-x handlers for each of them giving appropriate buffer
		 */
		if (rc > 0) {
			num_hrrq = rc;
			if (pci_enable_msix(pdev, entries, num_hrrq))
				goto pmcraid_isr_legacy;
		}

		for (i = 0; i < num_hrrq; i++) {
			pinstance->hrrq_vector[i].hrrq_id = i;
			pinstance->hrrq_vector[i].drv_inst = pinstance;
			pinstance->hrrq_vector[i].vector = entries[i].vector;
			rc = request_irq(pinstance->hrrq_vector[i].vector,
					pmcraid_isr_msix, 0,
					PMCRAID_DRIVER_NAME,
					&(pinstance->hrrq_vector[i]));

			if (rc) {
				int j;
				for (j = 0; j < i; j++)
					free_irq(entries[j].vector,
						 &(pinstance->hrrq_vector[j]));
				pci_disable_msix(pdev);
				goto pmcraid_isr_legacy;
			}
		}

		pinstance->num_hrrq = num_hrrq;
		pinstance->interrupt_mode = 1;
		iowrite32(DOORBELL_INTR_MODE_MSIX,
			  pinstance->int_regs.host_ioa_interrupt_reg);
		ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
		goto pmcraid_isr_out;
	}

pmcraid_isr_legacy:
	/* If MSI-X registration failed fallback to legacy mode, where
	 * only one hrrq entry will be used
	 */
	pinstance->hrrq_vector[0].hrrq_id = 0;
	pinstance->hrrq_vector[0].drv_inst = pinstance;
	pinstance->hrrq_vector[0].vector = pdev->irq;
	pinstance->num_hrrq = 1;
	rc = 0;

	rc = request_irq(pdev->irq, pmcraid_isr, IRQF_SHARED,
			 PMCRAID_DRIVER_NAME, &pinstance->hrrq_vector[0]);
pmcraid_isr_out:
	return rc;
}

Project: linux
File: pmcraid.c

static void pmcraid_reinit_cfgtable_done(struct pmcraid_cmd *cmd)
{
	pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n",
		     cmd->ioa_cb->ioarcb.cdb[0],
		     le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));

	if (cmd->release) {
		cmd->release = 0;
		pmcraid_return_cmd(cmd);
	}
	pmcraid_info("scheduling worker for config table reinitialization\n");
	schedule_work(&cmd->drv_inst->worker_q);
}

Project: linux
File: pmcraid.c

static void pmcraid_reinit_cmdblk(struct pmcraid_cmd *cmd)
{
	pmcraid_init_cmdblk(cmd, -1);
}

Project: linux
File: pmcraid.c

static void pmcraid_release_buffers(struct pmcraid_instance *pinstance)
{
	pmcraid_release_config_buffers(pinstance);
	pmcraid_release_control_blocks(pinstance, PMCRAID_MAX_CMD);
	pmcraid_release_cmd_blocks(pinstance, PMCRAID_MAX_CMD);
	pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);

	if (pinstance->inq_data != NULL) {
		pci_free_consistent(pinstance->pdev,
				    sizeof(struct pmcraid_inquiry_data),
				    pinstance->inq_data,
				    pinstance->inq_data_baddr);

		pinstance->inq_data = NULL;
		pinstance->inq_data_baddr = 0;
	}

	if (pinstance->timestamp_data != NULL) {
		pci_free_consistent(pinstance->pdev,
				    sizeof(struct pmcraid_timestamp_data),
				    pinstance->timestamp_data,
				    pinstance->timestamp_data_baddr);

		pinstance->timestamp_data = NULL;
		pinstance->timestamp_data_baddr = 0;
	}
}

Project: linux
File: pmcraid.c

pmcraid_release_cmd_blocks(struct pmcraid_instance *pinstance, int max_index)
{
	int i;
	for (i = 0; i < max_index; i++) {
		kmem_cache_free(pinstance->cmd_cachep, pinstance->cmd_list[i]);
		pinstance->cmd_list[i] = NULL;
	}
	kmem_cache_destroy(pinstance->cmd_cachep);
	pinstance->cmd_cachep = NULL;
}

Project: linux
File: pmcraid.c

static void pmcraid_release_config_buffers(struct pmcraid_instance *pinstance)
{
	if (pinstance->cfg_table != NULL &&
	    pinstance->cfg_table_bus_addr != 0) {
		pci_free_consistent(pinstance->pdev,
				    sizeof(struct pmcraid_config_table),
				    pinstance->cfg_table,
				    pinstance->cfg_table_bus_addr);
		pinstance->cfg_table = NULL;
		pinstance->cfg_table_bus_addr = 0;
	}

	if (pinstance->res_entries != NULL) {
		int i;

		for (i = 0; i < PMCRAID_MAX_RESOURCES; i++)
			list_del(&pinstance->res_entries[i].queue);
		kfree(pinstance->res_entries);
		pinstance->res_entries = NULL;
	}

	pmcraid_release_hcams(pinstance);
}

Project: linux
File: pmcraid.c

pmcraid_release_control_blocks(
	struct pmcraid_instance *pinstance,
	int max_index
)
{
	int i;

	if (pinstance->control_pool == NULL)
		return;

	for (i = 0; i < max_index; i++) {
		pci_pool_free(pinstance->control_pool,
			      pinstance->cmd_list[i]->ioa_cb,
			      pinstance->cmd_list[i]->ioa_cb_bus_addr);
		pinstance->cmd_list[i]->ioa_cb = NULL;
		pinstance->cmd_list[i]->ioa_cb_bus_addr = 0;
	}
	pci_pool_destroy(pinstance->control_pool);
	pinstance->control_pool = NULL;
}

Project: linux
File: pmcraid.c

static void pmcraid_release_hcams(struct pmcraid_instance *pinstance)
{
	if (pinstance->ccn.msg != NULL) {
		pci_free_consistent(pinstance->pdev,
				    PMCRAID_AEN_HDR_SIZE +
				    sizeof(struct pmcraid_hcam_ccn_ext),
				    pinstance->ccn.msg,
				    pinstance->ccn.baddr);

		pinstance->ccn.msg = NULL;
		pinstance->ccn.hcam = NULL;
		pinstance->ccn.baddr = 0;
	}

	if (pinstance->ldn.msg != NULL) {
		pci_free_consistent(pinstance->pdev,
				    PMCRAID_AEN_HDR_SIZE +
				    sizeof(struct pmcraid_hcam_ldn),
				    pinstance->ldn.msg,
				    pinstance->ldn.baddr);

		pinstance->ldn.msg = NULL;
		pinstance->ldn.hcam = NULL;
		pinstance->ldn.baddr = 0;
	}
}

Project: linux
File: pmcraid.c

pmcraid_release_host_rrqs(struct pmcraid_instance *pinstance, int maxindex)
{
	int i;
	for (i = 0; i < maxindex; i++) {

		pci_free_consistent(pinstance->pdev,
				    HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD,
				    pinstance->hrrq_start[i],
				    pinstance->hrrq_start_bus_addr[i]);

		/* reset pointers and toggle bit to zeros */
		pinstance->hrrq_start[i] = NULL;
		pinstance->hrrq_start_bus_addr[i] = 0;
		pinstance->host_toggle_bit[i] = 0;
	}
}

Project: linux
File: pmcraid.c

static void pmcraid_release_passthrough_ioadls(
	struct pmcraid_cmd *cmd,
	int buflen,
	int direction
)
{
	struct pmcraid_sglist *sglist = cmd->sglist;

	if (buflen > 0) {
		pci_unmap_sg(cmd->drv_inst->pdev,
			     sglist->scatterlist,
			     sglist->num_sg,
			     direction);
		pmcraid_free_sglist(sglist);
		cmd->sglist = NULL;
	}
}

Project: linux
File: pmcraid.c

static void __devexit pmcraid_remove(struct pci_dev *pdev)
{
	struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);

	/* remove the management interface (/dev file) for this device */
	pmcraid_release_chrdev(pinstance);

	/* remove host template from scsi midlayer */
	scsi_remove_host(pinstance->host);

	/* block requests from mid-layer */
	scsi_block_requests(pinstance->host);

	/* initiate shutdown adapter */
	pmcraid_shutdown(pdev);

	pmcraid_disable_interrupts(pinstance, ~0);
	flush_work_sync(&pinstance->worker_q);

	pmcraid_kill_tasklets(pinstance);
	pmcraid_unregister_interrupt_handler(pinstance);
	pmcraid_release_buffers(pinstance);
	iounmap(pinstance->mapped_dma_addr);
	pci_release_regions(pdev);
	scsi_host_put(pinstance->host);
	pci_disable_device(pdev);

	return;
}

Project: linux
File: pmcraid.c

static void pmcraid_request_sense(struct pmcraid_cmd *cmd)
{
	struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
	struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;

	/* allocate DMAable memory for sense buffers */
	cmd->sense_buffer = pci_alloc_consistent(cmd->drv_inst->pdev,
						 SCSI_SENSE_BUFFERSIZE,
						 &cmd->sense_buffer_dma);

	if (cmd->sense_buffer == NULL) {
		pmcraid_err
			("couldn't allocate sense buffer for request sense\n");
		pmcraid_erp_done(cmd);
		return;
	}

	/* re-use the command block */
	memset(&cmd->ioa_cb->ioasa, 0, sizeof(struct pmcraid_ioasa));
	memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
	ioarcb->request_flags0 = (SYNC_COMPLETE |
				  NO_LINK_DESCS |
				  INHIBIT_UL_CHECK);
	ioarcb->request_type = REQ_TYPE_SCSI;
	ioarcb->cdb[0] = REQUEST_SENSE;
	ioarcb->cdb[4] = SCSI_SENSE_BUFFERSIZE;

	ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
					offsetof(struct pmcraid_ioarcb,
						add_data.u.ioadl[0]));
	ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));

	ioarcb->data_transfer_length = cpu_to_le32(SCSI_SENSE_BUFFERSIZE);

	ioadl->address = cpu_to_le64(cmd->sense_buffer_dma);
	ioadl->data_len = cpu_to_le32(SCSI_SENSE_BUFFERSIZE);
	ioadl->flags = IOADL_FLAGS_LAST_DESC;

	/* request sense might be called as part of error response processing
	 * which runs in tasklets context. It is possible that mid-layer might
	 * schedule queuecommand during this time, hence, writting to IOARRIN
	 * must be protect by host_lock
	 */
	pmcraid_send_cmd(cmd, pmcraid_erp_done,
			 PMCRAID_REQUEST_SENSE_TIMEOUT,
			 pmcraid_timeout_handler);
}

Project: linux
File: pmcraid.c

static void pmcraid_reset_alert(struct pmcraid_cmd *cmd)
{
	struct pmcraid_instance *pinstance = cmd->drv_inst;
	u32 doorbells;
	int rc;
	u16 pci_reg;

	/* If we are able to access IOA PCI config space, alert IOA that we are
	 * going to reset it soon. This enables IOA to preserv persistent error
	 * data if any. In case memory space is not accessible, proceed with
	 * BIST or slot_reset
	 */
	rc = pci_read_config_word(pinstance->pdev, PCI_COMMAND, &pci_reg);
	if ((rc == PCIBIOS_SUCCESSFUL) && (pci_reg & PCI_COMMAND_MEMORY)) {

		/* wait for IOA permission i.e until CRITICAL_OPERATION bit is
		 * reset IOA doesn't generate any interrupts when CRITICAL
		 * OPERATION bit is reset. A timer is started to wait for this
		 * bit to be reset.
		 */
		cmd->time_left = PMCRAID_RESET_TIMEOUT;
		cmd->timer.data = (unsigned long)cmd;
		cmd->timer.expires = jiffies + PMCRAID_CHECK_FOR_RESET_TIMEOUT;
		cmd->timer.function =
			(void (*)(unsigned long))pmcraid_reset_alert_done;
		add_timer(&cmd->timer);

		iowrite32(DOORBELL_IOA_RESET_ALERT,
			pinstance->int_regs.host_ioa_interrupt_reg);
		doorbells =
			ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
		pmcraid_info("doorbells after reset alert: %x\n", doorbells);
	} else {
		pmcraid_info("PCI config is not accessible starting BIST\n");
		pinstance->ioa_state = IOA_STATE_IN_HARD_RESET;
		pmcraid_start_bist(cmd);
	}
}

Project: linux
File: pmcraid.c

static void pmcraid_reset_alert_done(struct pmcraid_cmd *cmd)
{
	struct pmcraid_instance *pinstance = cmd->drv_inst;
	u32 status = ioread32(pinstance->ioa_status);
	unsigned long lock_flags;

	/* if the critical operation in progress bit is set or the wait times
	 * out, invoke reset engine to proceed with hard reset. If there is
	 * some more time to wait, restart the timer
	 */
	if (((status & INTRS_CRITICAL_OP_IN_PROGRESS) == 0) ||
	    cmd->time_left <= 0) {
		pmcraid_info("critical op is reset proceeding with reset\n");
		spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
		pmcraid_ioa_reset(cmd);
		spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
	} else {
		pmcraid_info("critical op is not yet reset waiting again\n");
		/* restart timer if some more time is available to wait */
		cmd->time_left -= PMCRAID_CHECK_FOR_RESET_TIMEOUT;
		cmd->timer.data = (unsigned long)cmd;
		cmd->timer.expires = jiffies + PMCRAID_CHECK_FOR_RESET_TIMEOUT;
		cmd->timer.function =
			(void (*)(unsigned long))pmcraid_reset_alert_done;
		add_timer(&cmd->timer);
	}
}

Project: linux
File: pmcraid.c

static int pmcraid_reset_bringdown(struct pmcraid_instance *pinstance)
{
	return pmcraid_reset_reload(pinstance,
				    SHUTDOWN_NORMAL,
				    IOA_STATE_UNKNOWN);
}

Project: linux
File: pmcraid.c

static int pmcraid_reset_bringup(struct pmcraid_instance *pinstance)
{
	pmcraid_notify_ioastate(pinstance, PMC_DEVICE_EVENT_RESET_START);

	return pmcraid_reset_reload(pinstance,
				    SHUTDOWN_NONE,
				    IOA_STATE_OPERATIONAL);
}

Project: linux
File: pmcraid.c

static int pmcraid_reset_device(
	struct scsi_cmnd *scsi_cmd,
	unsigned long timeout,
	u8 modifier
)
{
	struct pmcraid_cmd *cmd;
	struct pmcraid_instance *pinstance;
	struct pmcraid_resource_entry *res;
	struct pmcraid_ioarcb *ioarcb;
	unsigned long lock_flags;
	u32 ioasc;

	pinstance =
		(struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
	res = scsi_cmd->device->hostdata;

	if (!res) {
		sdev_printk(KERN_ERR, scsi_cmd->device,
			    "reset_device: NULL resource pointer\n");
		return FAILED;
	}

	/* If adapter is currently going through reset/reload, return failed.
	 * This will force the mid-layer to call _eh_bus/host reset, which
	 * will then go to sleep and wait for the reset to complete
	 */
	spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
	if (pinstance->ioa_reset_in_progress ||
	    pinstance->ioa_state == IOA_STATE_DEAD) {
		spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
		return FAILED;
	}

	res->reset_progress = 1;
	pmcraid_info("Resetting %s resource with addr %x\n",
		     ((modifier & RESET_DEVICE_LUN) ? "LUN" :
		     ((modifier & RESET_DEVICE_TARGET) ? "TARGET" : "BUS")),
		     le32_to_cpu(res->cfg_entry.resource_address));

	/* get a free cmd block */
	cmd = pmcraid_get_free_cmd(pinstance);

	if (cmd == NULL) {
		spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
		pmcraid_err("%s: no cmd blocks are available\n", __func__);
		return FAILED;
	}

	ioarcb = &cmd->ioa_cb->ioarcb;
	ioarcb->resource_handle = res->cfg_entry.resource_handle;
	ioarcb->request_type = REQ_TYPE_IOACMD;
	ioarcb->cdb[0] = PMCRAID_RESET_DEVICE;

	/* Initialize reset modifier bits */
	if (modifier)
		modifier = ENABLE_RESET_MODIFIER | modifier;

	ioarcb->cdb[1] = modifier;

	init_completion(&cmd->wait_for_completion);
	cmd->completion_req = 1;

	pmcraid_info("cmd(CDB[0] = %x) for %x with index = %d\n",
		     cmd->ioa_cb->ioarcb.cdb[0],
		     le32_to_cpu(cmd->ioa_cb->ioarcb.resource_handle),
		     le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2);

	pmcraid_send_cmd(cmd,
			 pmcraid_internal_done,
			 timeout,
			 pmcraid_timeout_handler);

	spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);

	/* RESET_DEVICE command completes after all pending IOARCBs are
	 * completed. Once this command is completed, pmcraind_internal_done
	 * will wake up the 'completion' queue.
	 */
	wait_for_completion(&cmd->wait_for_completion);

	/* complete the command here itself and return the command block
	 * to free list
	 */
	pmcraid_return_cmd(cmd);
	res->reset_progress = 0;
	ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);

	/* set the return value based on the returned ioasc */
	return PMCRAID_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS;
}

Project: linux
File: pmcraid.c

static int pmcraid_reset_enable_ioa(struct pmcraid_instance *pinstance)
{
	u32 intrs;

	pmcraid_reinit_buffers(pinstance);
	intrs = pmcraid_read_interrupts(pinstance);

	pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);

	if (intrs & INTRS_TRANSITION_TO_OPERATIONAL) {
		if (!pinstance->interrupt_mode) {
			iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
				pinstance->int_regs.
				ioa_host_interrupt_mask_reg);
			iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
				pinstance->int_regs.ioa_host_interrupt_clr_reg);
		}
		return 1;
	} else {
		return 0;
	}
}

Project: linux
File: pmcraid.c

static int pmcraid_resume(struct pci_dev *pdev)
{
	struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
	struct Scsi_Host *host = pinstance->host;
	int rc;

	pci_set_power_state(pdev, PCI_D0);
	pci_enable_wake(pdev, PCI_D0, 0);
	pci_restore_state(pdev);

	rc = pci_enable_device(pdev);

	if (rc) {
		dev_err(&pdev->dev, "resume: Enable device failed\n");
		return rc;
	}

	pci_set_master(pdev);

	if ((sizeof(dma_addr_t) == 4) ||
	     pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
		rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));

	if (rc == 0)
		rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));

	if (rc != 0) {
		dev_err(&pdev->dev, "resume: Failed to set PCI DMA mask\n");
		goto disable_device;
	}

	pmcraid_disable_interrupts(pinstance, ~0);
	atomic_set(&pinstance->outstanding_cmds, 0);
	rc = pmcraid_register_interrupt_handler(pinstance);

	if (rc) {
		dev_err(&pdev->dev,
			"resume: couldn't register interrupt handlers\n");
		rc = -ENODEV;
		goto release_host;
	}

	pmcraid_init_tasklets(pinstance);
	pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);

	/* Start with hard reset sequence which brings up IOA to operational
	 * state as well as completes the reset sequence.
	 */
	pinstance->ioa_hard_reset = 1;

	/* Start IOA firmware initialization and bring card to Operational
	 * state.
	 */
	if (pmcraid_reset_bringup(pinstance)) {
		dev_err(&pdev->dev, "couldn't initialize IOA\n");
		rc = -ENODEV;
		goto release_tasklets;
	}

	return 0;

release_tasklets:
	pmcraid_disable_interrupts(pinstance, ~0);
	pmcraid_kill_tasklets(pinstance);
	pmcraid_unregister_interrupt_handler(pinstance);

release_host:
	scsi_host_put(host);

disable_device:
	pci_disable_device(pdev);

	return rc;
}

Project: linux
File: pmcraid.c

void pmcraid_return_cmd(struct pmcraid_cmd *cmd)
{
	struct pmcraid_instance *pinstance = cmd->drv_inst;
	unsigned long lock_flags;

	spin_lock_irqsave(&pinstance->free_pool_lock, lock_flags);
	list_add_tail(&cmd->free_list, &pinstance->free_cmd_pool);
	spin_unlock_irqrestore(&pinstance->free_pool_lock, lock_flags);
}

Project: linux
File: pmcraid.c

static void pmcraid_send_cmd(
	struct pmcraid_cmd *cmd,
	void (*cmd_done) (struct pmcraid_cmd *),
	unsigned long timeout,
	void (*timeout_func) (struct pmcraid_cmd *)
)
{
	/* initialize done function */
	cmd->cmd_done = cmd_done;

	if (timeout_func) {
		/* setup timeout handler */
		cmd->timer.data = (unsigned long)cmd;
		cmd->timer.expires = jiffies + timeout;
		cmd->timer.function = (void (*)(unsigned long))timeout_func;
		add_timer(&cmd->timer);
	}

	/* fire the command to IOA */
	_pmcraid_fire_command(cmd);
}

Project: linux
File: pmcraid.c

static void pmcraid_send_hcam(struct pmcraid_instance *pinstance, u8 type)
{
	struct pmcraid_cmd *cmd = pmcraid_init_hcam(pinstance, type);
	pmcraid_send_hcam_cmd(cmd);
}

Project: linux
File: pmcraid.c

static void pmcraid_send_hcam_cmd(struct pmcraid_cmd *cmd)
{
	if (cmd->ioa_cb->ioarcb.cdb[1] == PMCRAID_HCAM_CODE_CONFIG_CHANGE)
		atomic_set(&(cmd->drv_inst->ccn.ignore), 0);
	else
		atomic_set(&(cmd->drv_inst->ldn.ignore), 0);

	pmcraid_send_cmd(cmd, cmd->cmd_done, 0, NULL);
}

Project: linux
File: pmcraid.c

static void pmcraid_set_supported_devs(struct pmcraid_cmd *cmd)
{
	struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
	void (*cmd_done) (struct pmcraid_cmd *) = pmcraid_complete_ioa_reset;

	pmcraid_reinit_cmdblk(cmd);

	ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
	ioarcb->request_type = REQ_TYPE_IOACMD;
	ioarcb->cdb[0] = PMCRAID_SET_SUPPORTED_DEVICES;
	ioarcb->cdb[1] = ALL_DEVICES_SUPPORTED;

	/* If this was called as part of resource table reinitialization due to
	 * lost CCN, it is enough to return the command block back to free pool
	 * as part of set_supported_devs completion function.
	 */
	if (cmd->drv_inst->reinit_cfg_table) {
		cmd->drv_inst->reinit_cfg_table = 0;
		cmd->release = 1;
		cmd_done = pmcraid_reinit_cfgtable_done;
	}

	/* we will be done with the reset sequence after set supported devices,
	 * setup the done function to return the command block back to free
	 * pool
	 */
	pmcraid_send_cmd(cmd,
			 cmd_done,
			 PMCRAID_SET_SUP_DEV_TIMEOUT,
			 pmcraid_timeout_handler);
	return;
}

Project: linux
File: pmcraid.c

static void pmcraid_set_timestamp(struct pmcraid_cmd *cmd)
{
	struct pmcraid_instance *pinstance = cmd->drv_inst;
	struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
	__be32 time_stamp_len = cpu_to_be32(PMCRAID_TIMESTAMP_LEN);
	struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;

	struct timeval tv;
	__le64 timestamp;

	do_gettimeofday(&tv);
	timestamp = tv.tv_sec * 1000;

	pinstance->timestamp_data->timestamp[0] = (__u8)(timestamp);
	pinstance->timestamp_data->timestamp[1] = (__u8)((timestamp) >> 8);
	pinstance->timestamp_data->timestamp[2] = (__u8)((timestamp) >> 16);
	pinstance->timestamp_data->timestamp[3] = (__u8)((timestamp) >> 24);
	pinstance->timestamp_data->timestamp[4] = (__u8)((timestamp) >> 32);
	pinstance->timestamp_data->timestamp[5] = (__u8)((timestamp)  >> 40);

	pmcraid_reinit_cmdblk(cmd);
	ioarcb->request_type = REQ_TYPE_SCSI;
	ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
	ioarcb->cdb[0] = PMCRAID_SCSI_SET_TIMESTAMP;
	ioarcb->cdb[1] = PMCRAID_SCSI_SERVICE_ACTION;
	memcpy(&(ioarcb->cdb[6]), &time_stamp_len, sizeof(time_stamp_len));

	ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
					offsetof(struct pmcraid_ioarcb,
						add_data.u.ioadl[0]));
	ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
	ioarcb->ioarcb_bus_addr &= ~(0x1FULL);

	ioarcb->request_flags0 |= NO_LINK_DESCS;
	ioarcb->request_flags0 |= TRANSFER_DIR_WRITE;
	ioarcb->data_transfer_length =
		cpu_to_le32(sizeof(struct pmcraid_timestamp_data));
	ioadl = &(ioarcb->add_data.u.ioadl[0]);
	ioadl->flags = IOADL_FLAGS_LAST_DESC;
	ioadl->address = cpu_to_le64(pinstance->timestamp_data_baddr);
	ioadl->data_len = cpu_to_le32(sizeof(struct pmcraid_timestamp_data));

	if (!pinstance->timestamp_error) {
		pinstance->timestamp_error = 0;
		pmcraid_send_cmd(cmd, pmcraid_set_supported_devs,
			 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
	} else {
		pmcraid_send_cmd(cmd, pmcraid_return_cmd,
			 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
		return;
	}
}

Project: linux
File: pmcraid.c

static int pmcraid_setup_chrdev(struct pmcraid_instance *pinstance)
{
	int minor;
	int error;

	minor = pmcraid_get_minor();
	cdev_init(&pinstance->cdev, &pmcraid_fops);
	pinstance->cdev.owner = THIS_MODULE;

	error = cdev_add(&pinstance->cdev, MKDEV(pmcraid_major, minor), 1);

	if (error)
		pmcraid_release_minor(minor);
	else
		device_create(pmcraid_class, NULL, MKDEV(pmcraid_major, minor),
			      NULL, "%s%u", PMCRAID_DEVFILE, minor);
	return error;
}

Project: linux
File: pmcraid.c

static ssize_t pmcraid_show_adapter_id(
	struct device *dev,
	struct device_attribute *attr,
	char *buf
)
{
	struct Scsi_Host *shost = class_to_shost(dev);
	struct pmcraid_instance *pinstance =
		(struct pmcraid_instance *)shost->hostdata;
	u32 adapter_id = (pinstance->pdev->bus->number << 8) |
		pinstance->pdev->devfn;
	u32 aen_group = pmcraid_event_family.id;

	return snprintf(buf, PAGE_SIZE,
			"adapter id: %d\nminor: %d\naen group: %d\n",
			adapter_id, MINOR(pinstance->cdev.dev), aen_group);
}

Project: linux
File: pmcraid.c

static ssize_t pmcraid_show_drv_version(
	struct device *dev,
	struct device_attribute *attr,
	char *buf
)
{
	return snprintf(buf, PAGE_SIZE, "version: %s\n",
			PMCRAID_DRIVER_VERSION);
}

Project: linux
File: pmcraid.c

static ssize_t pmcraid_show_log_level(
	struct device *dev,
	struct device_attribute *attr,
	char *buf)
{
	struct Scsi_Host *shost = class_to_shost(dev);
	struct pmcraid_instance *pinstance =
		(struct pmcraid_instance *)shost->hostdata;
	return snprintf(buf, PAGE_SIZE, "%d\n", pinstance->current_log_level);
}

Project: linux
File: pmcraid.c

static int pmcraid_slave_alloc(struct scsi_device *scsi_dev)
{
	struct pmcraid_resource_entry *temp, *res = NULL;
	struct pmcraid_instance *pinstance;
	u8 target, bus, lun;
	unsigned long lock_flags;
	int rc = -ENXIO;
	u16 fw_version;

	pinstance = shost_priv(scsi_dev->host);

	fw_version = be16_to_cpu(pinstance->inq_data->fw_version);

	/* Driver exposes VSET and GSCSI resources only; all other device types
	 * are not exposed. Resource list is synchronized using resource lock
	 * so any traversal or modifications to the list should be done inside
	 * this lock
	 */
	spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
	list_for_each_entry(temp, &pinstance->used_res_q, queue) {

		/* do not expose VSETs with order-ids > MAX_VSET_TARGETS */
		if (RES_IS_VSET(temp->cfg_entry)) {
			if (fw_version <= PMCRAID_FW_VERSION_1)
				target = temp->cfg_entry.unique_flags1;
			else
				target = temp->cfg_entry.array_id & 0xFF;

			if (target > PMCRAID_MAX_VSET_TARGETS)
				continue;
			bus = PMCRAID_VSET_BUS_ID;
			lun = 0;
		} else if (RES_IS_GSCSI(temp->cfg_entry)) {
			target = RES_TARGET(temp->cfg_entry.resource_address);
			bus = PMCRAID_PHYS_BUS_ID;
			lun = RES_LUN(temp->cfg_entry.resource_address);
		} else {
			continue;
		}

		if (bus == scsi_dev->channel &&
		    target == scsi_dev->id &&
		    lun == scsi_dev->lun) {
			res = temp;
			break;
		}
	}

	if (res) {
		res->scsi_dev = scsi_dev;
		scsi_dev->hostdata = res;
		res->change_detected = 0;
		atomic_set(&res->read_failures, 0);
		atomic_set(&res->write_failures, 0);
		rc = 0;
	}
	spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
	return rc;
}

Project: linux
File: pmcraid.c

static int pmcraid_slave_configure(struct scsi_device *scsi_dev)
{
	struct pmcraid_resource_entry *res = scsi_dev->hostdata;

	if (!res)
		return 0;

	/* LLD exposes VSETs and Enclosure devices only */
	if (RES_IS_GSCSI(res->cfg_entry) &&
	    scsi_dev->type != TYPE_ENCLOSURE)
		return -ENXIO;

	pmcraid_info("configuring %x:%x:%x:%x\n",
		     scsi_dev->host->unique_id,
		     scsi_dev->channel,
		     scsi_dev->id,
		     scsi_dev->lun);

	if (RES_IS_GSCSI(res->cfg_entry)) {
		scsi_dev->allow_restart = 1;
	} else if (RES_IS_VSET(res->cfg_entry)) {
		scsi_dev->allow_restart = 1;
		blk_queue_rq_timeout(scsi_dev->request_queue,
				     PMCRAID_VSET_IO_TIMEOUT);
		blk_queue_max_hw_sectors(scsi_dev->request_queue,
				      PMCRAID_VSET_MAX_SECTORS);
	}

	if (scsi_dev->tagged_supported &&
	    (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry))) {
		scsi_activate_tcq(scsi_dev, scsi_dev->queue_depth);
		scsi_adjust_queue_depth(scsi_dev, MSG_SIMPLE_TAG,
					scsi_dev->host->cmd_per_lun);
	} else {
		scsi_adjust_queue_depth(scsi_dev, 0,
					scsi_dev->host->cmd_per_lun);
	}

	return 0;
}

Project: linux
File: pmcraid.c

static void pmcraid_slave_destroy(struct scsi_device *scsi_dev)
{
	struct pmcraid_resource_entry *res;

	res = (struct pmcraid_resource_entry *)scsi_dev->hostdata;

	if (res)
		res->scsi_dev = NULL;

	scsi_dev->hostdata = NULL;
}

Project: linux
File: pmcraid.c

static void pmcraid_soft_reset(struct pmcraid_cmd *cmd)
{
	struct pmcraid_instance *pinstance = cmd->drv_inst;
	u32 int_reg;
	u32 doorbell;

	/* There will be an interrupt when Transition to Operational bit is
	 * set so tasklet would execute next reset task. The timeout handler
	 * would re-initiate a reset
	 */
	cmd->cmd_done = pmcraid_ioa_reset;
	cmd->timer.data = (unsigned long)cmd;
	cmd->timer.expires = jiffies +
			     msecs_to_jiffies(PMCRAID_TRANSOP_TIMEOUT);
	cmd->timer.function = (void (*)(unsigned long))pmcraid_timeout_handler;

	if (!timer_pending(&cmd->timer))
		add_timer(&cmd->timer);

	/* Enable destructive diagnostics on IOA if it is not yet in
	 * operational state
	 */
	doorbell = DOORBELL_RUNTIME_RESET |
		   DOORBELL_ENABLE_DESTRUCTIVE_DIAGS;

	/* Since we do RESET_ALERT and Start BIST we have to again write
	 * MSIX Doorbell to indicate the interrupt mode
	 */
	if (pinstance->interrupt_mode) {
		iowrite32(DOORBELL_INTR_MODE_MSIX,
			  pinstance->int_regs.host_ioa_interrupt_reg);
		ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
	}

	iowrite32(doorbell, pinstance->int_regs.host_ioa_interrupt_reg);
	ioread32(pinstance->int_regs.host_ioa_interrupt_reg),
	int_reg = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);

	pmcraid_info("Waiting for IOA to become operational %x:%x\n",
		     ioread32(pinstance->int_regs.host_ioa_interrupt_reg),
		     int_reg);
}

Project: linux
File: pmcraid.c

static void pmcraid_start_bist(struct pmcraid_cmd *cmd)
{
	struct pmcraid_instance *pinstance = cmd->drv_inst;
	u32 doorbells, intrs;

	/* proceed with bist and wait for 2 seconds */
	iowrite32(DOORBELL_IOA_START_BIST,
		pinstance->int_regs.host_ioa_interrupt_reg);
	doorbells = ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
	intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
	pmcraid_info("doorbells after start bist: %x intrs: %x\n",
		      doorbells, intrs);

	cmd->time_left = msecs_to_jiffies(PMCRAID_BIST_TIMEOUT);
	cmd->timer.data = (unsigned long)cmd;
	cmd->timer.expires = jiffies + msecs_to_jiffies(PMCRAID_BIST_TIMEOUT);
	cmd->timer.function = (void (*)(unsigned long))pmcraid_bist_done;
	add_timer(&cmd->timer);
}

Project: linux
File: pmcraid.c

static ssize_t pmcraid_store_log_level(
	struct device *dev,
	struct device_attribute *attr,
	const char *buf,
	size_t count
)
{
	struct Scsi_Host *shost;
	struct pmcraid_instance *pinstance;
	unsigned long val;

	if (strict_strtoul(buf, 10, &val))
		return -EINVAL;
	/* log-level should be from 0 to 2 */
	if (val > 2)
		return -EINVAL;

	shost = class_to_shost(dev);
	pinstance = (struct pmcraid_instance *)shost->hostdata;
	pinstance->current_log_level = val;

	return strlen(buf);
}

Project: linux
File: pmcraid.c

static int pmcraid_suspend(struct pci_dev *pdev, pm_message_t state)
{
	struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);

	pmcraid_shutdown(pdev);
	pmcraid_disable_interrupts(pinstance, ~0);
	pmcraid_kill_tasklets(pinstance);
	pci_set_drvdata(pinstance->pdev, pinstance);
	pmcraid_unregister_interrupt_handler(pinstance);
	pci_save_state(pdev);
	pci_disable_device(pdev);
	pci_set_power_state(pdev, pci_choose_state(pdev, state));

	return 0;
}

Project: linux
File: pmcraid.c

static u8 pmcraid_task_attributes(struct scsi_cmnd *scsi_cmd)
{
	char tag[2];
	u8 rc = 0;

	if (scsi_populate_tag_msg(scsi_cmd, tag)) {
		switch (tag[0]) {
		case MSG_SIMPLE_TAG:
			rc = TASK_TAG_SIMPLE;
			break;
		case MSG_HEAD_TAG:
			rc = TASK_TAG_QUEUE_HEAD;
			break;
		case MSG_ORDERED_TAG:
			rc = TASK_TAG_ORDERED;
			break;
		};
	}

	return rc;
}

Project: linux
File: pmcraid.c

static void pmcraid_tasklet_function(unsigned long instance)
{
	struct pmcraid_isr_param *hrrq_vector;
	struct pmcraid_instance *pinstance;
	unsigned long hrrq_lock_flags;
	unsigned long pending_lock_flags;
	unsigned long host_lock_flags;
	spinlock_t *lockp; /* hrrq buffer lock */
	int id;
	__le32 resp;

	hrrq_vector = (struct pmcraid_isr_param *)instance;
	pinstance = hrrq_vector->drv_inst;
	id = hrrq_vector->hrrq_id;
	lockp = &(pinstance->hrrq_lock[id]);

	/* loop through each of the commands responded by IOA. Each HRRQ buf is
	 * protected by its own lock. Traversals must be done within this lock
	 * as there may be multiple tasklets running on multiple CPUs. Note
	 * that the lock is held just for picking up the response handle and
	 * manipulating hrrq_curr/toggle_bit values.
	 */
	spin_lock_irqsave(lockp, hrrq_lock_flags);

	resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));

	while ((resp & HRRQ_TOGGLE_BIT) ==
		pinstance->host_toggle_bit[id]) {

		int cmd_index = resp >> 2;
		struct pmcraid_cmd *cmd = NULL;

		if (pinstance->hrrq_curr[id] < pinstance->hrrq_end[id]) {
			pinstance->hrrq_curr[id]++;
		} else {
			pinstance->hrrq_curr[id] = pinstance->hrrq_start[id];
			pinstance->host_toggle_bit[id] ^= 1u;
		}

		if (cmd_index >= PMCRAID_MAX_CMD) {
			/* In case of invalid response handle, log message */
			pmcraid_err("Invalid response handle %d\n", cmd_index);
			resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
			continue;
		}

		cmd = pinstance->cmd_list[cmd_index];
		spin_unlock_irqrestore(lockp, hrrq_lock_flags);

		spin_lock_irqsave(&pinstance->pending_pool_lock,
				   pending_lock_flags);
		list_del(&cmd->free_list);
		spin_unlock_irqrestore(&pinstance->pending_pool_lock,
					pending_lock_flags);
		del_timer(&cmd->timer);
		atomic_dec(&pinstance->outstanding_cmds);

		if (cmd->cmd_done == pmcraid_ioa_reset) {
			spin_lock_irqsave(pinstance->host->host_lock,
					  host_lock_flags);
			cmd->cmd_done(cmd);
			spin_unlock_irqrestore(pinstance->host->host_lock,
					       host_lock_flags);
		} else if (cmd->cmd_done != NULL) {
			cmd->cmd_done(cmd);
		}
		/* loop over until we are done with all responses */
		spin_lock_irqsave(lockp, hrrq_lock_flags);
		resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
	}

	spin_unlock_irqrestore(lockp, hrrq_lock_flags);
}

Project: linux
File: pmcraid.c

static void pmcraid_timeout_handler(struct pmcraid_cmd *cmd)
{
	struct pmcraid_instance *pinstance = cmd->drv_inst;
	unsigned long lock_flags;

	dev_info(&pinstance->pdev->dev,
		"Adapter being reset due to cmd(CDB[0] = %x) timeout\n",
		cmd->ioa_cb->ioarcb.cdb[0]);

	/* Command timeouts result in hard reset sequence. The command that got
	 * timed out may be the one used as part of reset sequence. In this
	 * case restart reset sequence using the same command block even if
	 * reset is in progress. Otherwise fail this command and get a free
	 * command block to restart the reset sequence.
	 */
	spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
	if (!pinstance->ioa_reset_in_progress) {
		pinstance->ioa_reset_attempts = 0;
		cmd = pmcraid_get_free_cmd(pinstance);

		/* If we are out of command blocks, just return here itself.
		 * Some other command's timeout handler can do the reset job
		 */
		if (cmd == NULL) {
			spin_unlock_irqrestore(pinstance->host->host_lock,
					       lock_flags);
			pmcraid_err("no free cmnd block for timeout handler\n");
			return;
		}

		pinstance->reset_cmd = cmd;
		pinstance->ioa_reset_in_progress = 1;
	} else {
		pmcraid_info("reset is already in progress\n");

		if (pinstance->reset_cmd != cmd) {
			/* This command should have been given to IOA, this
			 * command will be completed by fail_outstanding_cmds
			 * anyway
			 */
			pmcraid_err("cmd is pending but reset in progress\n");
		}

		/* If this command was being used as part of the reset
		 * sequence, set cmd_done pointer to pmcraid_ioa_reset. This
		 * causes fail_outstanding_commands not to return the command
		 * block back to free pool
		 */
		if (cmd == pinstance->reset_cmd)
			cmd->cmd_done = pmcraid_ioa_reset;
	}

	/* Notify apps of important IOA bringup/bringdown sequences */
	if (pinstance->scn.ioa_state != PMC_DEVICE_EVENT_RESET_START &&
	    pinstance->scn.ioa_state != PMC_DEVICE_EVENT_SHUTDOWN_START)
		pmcraid_notify_ioastate(pinstance,
					PMC_DEVICE_EVENT_RESET_START);

	pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
	scsi_block_requests(pinstance->host);
	pmcraid_reset_alert(cmd);
	spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
}

Project: linux
File: pmcraid.c

static void pmcraid_unregister_hcams(struct pmcraid_cmd *cmd)
{
	struct pmcraid_instance *pinstance = cmd->drv_inst;

	/* During IOA bringdown, HCAM gets fired and tasklet proceeds with
	 * handling hcam response though it is not necessary. In order to
	 * prevent this, set 'ignore', so that bring-down sequence doesn't
	 * re-send any more hcams
	 */
	atomic_set(&pinstance->ccn.ignore, 1);
	atomic_set(&pinstance->ldn.ignore, 1);

	/* If adapter reset was forced as part of runtime reset sequence,
	 * start the reset sequence. Reset will be triggered even in case
	 * IOA unit_check.
	 */
	if ((pinstance->force_ioa_reset && !pinstance->ioa_bringdown) ||
	     pinstance->ioa_unit_check) {
		pinstance->force_ioa_reset = 0;
		pinstance->ioa_unit_check = 0;
		pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
		pmcraid_reset_alert(cmd);
		return;
	}

	/* Driver tries to cancel HCAMs by sending ABORT TASK for each HCAM
	 * one after the other. So CCN cancellation will be triggered by
	 * pmcraid_cancel_ldn itself.
	 */
	pmcraid_cancel_ldn(cmd);
}

Project: linux
File: pmcraid.c

void pmcraid_unregister_interrupt_handler(struct pmcraid_instance *pinstance)
{
	int i;

	for (i = 0; i < pinstance->num_hrrq; i++)
		free_irq(pinstance->hrrq_vector[i].vector,
			 &(pinstance->hrrq_vector[i]));

	if (pinstance->interrupt_mode) {
		pci_disable_msix(pinstance->pdev);
		pinstance->interrupt_mode = 0;
	}
}

Project: linux
File: pmcraid.c

static void pmcraid_worker_function(struct work_struct *workp)
{
	struct pmcraid_instance *pinstance;
	struct pmcraid_resource_entry *res;
	struct pmcraid_resource_entry *temp;
	struct scsi_device *sdev;
	unsigned long lock_flags;
	unsigned long host_lock_flags;
	u16 fw_version;
	u8 bus, target, lun;

	pinstance = container_of(workp, struct pmcraid_instance, worker_q);
	/* add resources only after host is added into system */
	if (!atomic_read(&pinstance->expose_resources))
		return;

	fw_version = be16_to_cpu(pinstance->inq_data->fw_version);

	spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
	list_for_each_entry_safe(res, temp, &pinstance->used_res_q, queue) {

		if (res->change_detected == RES_CHANGE_DEL && res->scsi_dev) {
			sdev = res->scsi_dev;

			/* host_lock must be held before calling
			 * scsi_device_get
			 */
			spin_lock_irqsave(pinstance->host->host_lock,
					  host_lock_flags);
			if (!scsi_device_get(sdev)) {
				spin_unlock_irqrestore(
						pinstance->host->host_lock,
						host_lock_flags);
				pmcraid_info("deleting %x from midlayer\n",
					     res->cfg_entry.resource_address);
				list_move_tail(&res->queue,
						&pinstance->free_res_q);
				spin_unlock_irqrestore(
					&pinstance->resource_lock,
					lock_flags);
				scsi_remove_device(sdev);
				scsi_device_put(sdev);
				spin_lock_irqsave(&pinstance->resource_lock,
						   lock_flags);
				res->change_detected = 0;
			} else {
				spin_unlock_irqrestore(
						pinstance->host->host_lock,
						host_lock_flags);
			}
		}
	}

	list_for_each_entry(res, &pinstance->used_res_q, queue) {

		if (res->change_detected == RES_CHANGE_ADD) {

			if (!pmcraid_expose_resource(fw_version,
						     &res->cfg_entry))
				continue;

			if (RES_IS_VSET(res->cfg_entry)) {
				bus = PMCRAID_VSET_BUS_ID;
				if (fw_version <= PMCRAID_FW_VERSION_1)
					target = res->cfg_entry.unique_flags1;
				else
					target = res->cfg_entry.array_id & 0xFF;
				lun = PMCRAID_VSET_LUN_ID;
			} else {
				bus = PMCRAID_PHYS_BUS_ID;
				target =
				     RES_TARGET(
					res->cfg_entry.resource_address);
				lun = RES_LUN(res->cfg_entry.resource_address);
			}

			res->change_detected = 0;
			spin_unlock_irqrestore(&pinstance->resource_lock,
						lock_flags);
			scsi_add_device(pinstance->host, bus, target, lun);
			spin_lock_irqsave(&pinstance->resource_lock,
					   lock_flags);
		}
	}

	spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
}