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scsi: ibmvfc: Track max and desired queue size in ibmvfc_channels

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Add fields for desired and max number of queues to ibmvfc_channels. With
support for NVMeoF protocol coming these sorts of values should be tracked
in the protocol specific channel struct instead of the overarching host
adapter.

Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
Link: https://lore.kernel.org/r/20230921225435.3537728-8-tyreld@linux.ibm.com
Reviewed-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Tyrel Datwyler 2023-09-21 17:54:31 -05:00 committed by Martin K. Petersen
parent d3558ca8a0
commit 9e5605404b
2 changed files with 11 additions and 7 deletions
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13
drivers/scsi/ibmvscsi/ibmvfc.c
View File

@ -1489,7 +1489,7 @@ static void ibmvfc_set_login_info(struct ibmvfc_host *vhost)
max_cmds = scsi_qdepth + IBMVFC_NUM_INTERNAL_REQ;
if (mq_enabled)
max_cmds += (scsi_qdepth + IBMVFC_NUM_INTERNAL_SUBQ_REQ) *
vhost->client_scsi_channels;
vhost->scsi_scrqs.desired_queues;
memset(login_info, 0, sizeof(*login_info));
@ -3578,11 +3578,12 @@ static ssize_t ibmvfc_show_scsi_channels(struct device *dev,
{
struct Scsi_Host *shost = class_to_shost(dev);
struct ibmvfc_host *vhost = shost_priv(shost);
struct ibmvfc_channels *scsi = &vhost->scsi_scrqs;
unsigned long flags = 0;
int len;
spin_lock_irqsave(shost->host_lock, flags);
len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->client_scsi_channels);
len = snprintf(buf, PAGE_SIZE, "%d\n", scsi->desired_queues);
spin_unlock_irqrestore(shost->host_lock, flags);
return len;
}
@ -3593,12 +3594,13 @@ static ssize_t ibmvfc_store_scsi_channels(struct device *dev,
{
struct Scsi_Host *shost = class_to_shost(dev);
struct ibmvfc_host *vhost = shost_priv(shost);
struct ibmvfc_channels *scsi = &vhost->scsi_scrqs;
unsigned long flags = 0;
unsigned int channels;
spin_lock_irqsave(shost->host_lock, flags);
channels = simple_strtoul(buf, NULL, 10);
vhost->client_scsi_channels = min(channels, nr_scsi_hw_queues);
scsi->desired_queues = min(channels, shost->nr_hw_queues);
ibmvfc_hard_reset_host(vhost);
spin_unlock_irqrestore(shost->host_lock, flags);
return strlen(buf);
@ -5066,7 +5068,7 @@ static void ibmvfc_channel_setup(struct ibmvfc_host *vhost)
struct ibmvfc_event *evt = ibmvfc_get_reserved_event(&vhost->crq);
struct ibmvfc_channels *scrqs = &vhost->scsi_scrqs;
unsigned int num_channels =
min(vhost->client_scsi_channels, vhost->max_vios_scsi_channels);
min(scrqs->desired_queues, vhost->max_vios_scsi_channels);
int level = IBMVFC_DEFAULT_LOG_LEVEL;
int i;
@ -6290,7 +6292,8 @@ static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id)
vhost->task_set = 1;
vhost->mq_enabled = mq_enabled;
vhost->client_scsi_channels = min(shost->nr_hw_queues, nr_scsi_channels);
vhost->scsi_scrqs.desired_queues = min(shost->nr_hw_queues, nr_scsi_channels);
vhost->scsi_scrqs.max_queues = shost->nr_hw_queues;
vhost->using_channels = 0;
vhost->do_enquiry = 1;
vhost->scan_timeout = 0;

5
drivers/scsi/ibmvscsi/ibmvfc.h
View File

@ -818,6 +818,8 @@ struct ibmvfc_queue {
struct ibmvfc_channels {
struct ibmvfc_queue *scrqs;
unsigned int active_queues;
unsigned int desired_queues;
unsigned int max_queues;
};
enum ibmvfc_host_action {
@ -876,8 +878,7 @@ struct ibmvfc_host {
int log_level;
struct ibmvfc_discover_targets_entry *disc_buf;
struct mutex passthru_mutex;
int max_vios_scsi_channels;
int client_scsi_channels;
unsigned int max_vios_scsi_channels;
int task_set;
int init_retries;
int discovery_threads;