Implement the following suggestions and add two new attributes
to allow for debugging the port LUN table.
- use scnprintf() instead of snprintf()
- use DEVICE_ATTR_RO and DEVICE_ATTR_RW
Suggested-by: Shane Seymour
Signed-off-by: Matthew R. Ochs
Signed-off-by: Manoj N. Kumar
Reviewed-by: Brian King
---
drivers/scsi/cxlflash/main.c | 180 +--
1 file changed, 138 insertions(+), 42 deletions(-)
diff --git a/drivers/scsi/cxlflash/main.c b/drivers/scsi/cxlflash/main.c
index 226cefe..b44212b 100644
--- a/drivers/scsi/cxlflash/main.c
+++ b/drivers/scsi/cxlflash/main.c
@@ -1995,33 +1995,24 @@ static int cxlflash_change_queue_depth(struct
scsi_device *sdev, int qdepth)
/**
* cxlflash_show_port_status() - queries and presents the current port status
- * @dev: Generic device associated with the host owning the port.
- * @attr: Device attribute representing the port.
+ * @port: Desired port for status reporting.
+ * @afu: AFU owning the specified port.
* @buf: Buffer of length PAGE_SIZE to report back port status in ASCII.
*
* Return: The size of the ASCII string returned in @buf.
*/
-static ssize_t cxlflash_show_port_status(struct device *dev,
-struct device_attribute *attr,
-char *buf)
+static ssize_t cxlflash_show_port_status(u32 port, struct afu *afu, char *buf)
{
- struct Scsi_Host *shost = class_to_shost(dev);
- struct cxlflash_cfg *cfg = (struct cxlflash_cfg *)shost->hostdata;
- struct afu *afu = cfg->afu;
-
char *disp_status;
- int rc;
- u32 port;
u64 status;
- u64 *fc_regs;
+ __be64 __iomem *fc_regs;
- rc = kstrtouint((attr->attr.name + 4), 10, &port);
- if (rc || (port >= NUM_FC_PORTS))
+ if (port >= NUM_FC_PORTS)
return 0;
fc_regs = &afu->afu_map->global.fc_regs[port][0];
- status =
- (readq_be(&fc_regs[FC_MTIP_STATUS / 8]) & FC_MTIP_STATUS_MASK);
+ status = readq_be(&fc_regs[FC_MTIP_STATUS / 8]);
+ status &= FC_MTIP_STATUS_MASK;
if (status == FC_MTIP_STATUS_ONLINE)
disp_status = "online";
@@ -2030,31 +2021,69 @@ static ssize_t cxlflash_show_port_status(struct device
*dev,
else
disp_status = "unknown";
- return snprintf(buf, PAGE_SIZE, "%s\n", disp_status);
+ return scnprintf(buf, PAGE_SIZE, "%s\n", disp_status);
+}
+
+/**
+ * port0_show() - queries and presents the current status of port 0
+ * @dev: Generic device associated with the host owning the port.
+ * @attr: Device attribute representing the port.
+ * @buf: Buffer of length PAGE_SIZE to report back port status in ASCII.
+ *
+ * Return: The size of the ASCII string returned in @buf.
+ */
+static ssize_t port0_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct Scsi_Host *shost = class_to_shost(dev);
+ struct cxlflash_cfg *cfg = (struct cxlflash_cfg *)shost->hostdata;
+ struct afu *afu = cfg->afu;
+
+ return cxlflash_show_port_status(0, afu, buf);
}
/**
- * cxlflash_show_lun_mode() - presents the current LUN mode of the host
+ * port1_show() - queries and presents the current status of port 1
+ * @dev: Generic device associated with the host owning the port.
+ * @attr: Device attribute representing the port.
+ * @buf: Buffer of length PAGE_SIZE to report back port status in ASCII.
+ *
+ * Return: The size of the ASCII string returned in @buf.
+ */
+static ssize_t port1_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct Scsi_Host *shost = class_to_shost(dev);
+ struct cxlflash_cfg *cfg = (struct cxlflash_cfg *)shost->hostdata;
+ struct afu *afu = cfg->afu;
+
+ return cxlflash_show_port_status(1, afu, buf);
+}
+
+/**
+ * lun_mode_show() - presents the current LUN mode of the host
* @dev: Generic device associated with the host.
- * @attr: Device attribute representing the lun mode.
+ * @attr: Device attribute representing the LUN mode.
* @buf: Buffer of length PAGE_SIZE to report back the LUN mode in ASCII.
*
* Return: The size of the ASCII string returned in @buf.
*/
-static ssize_t cxlflash_show_lun_mode(struct device *dev,
- struct device_attribute *attr, char *buf)
+static ssize_t lun_mode_show(struct device *dev,
+struct device_attribute *attr, char *buf)
{
struct Scsi_Host *shost = class_to_shost(dev);
struct cxlflash_cfg *cfg = (struct cxlflash_cfg *)shost->hostdata;
struct afu *afu = cfg->afu;
- return snprintf(buf, PAGE_SIZE, "%u\n", afu->internal_lun);
+ return scnprintf(buf, PAGE_SIZE, "%u\n", afu->internal
