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scsi: hisi_sas: Create root and device debugfs directories 

This patch creates root directory at hisi_sas_init() and generates device
directory when we probe device driver.

And we remove the root directory at hisi_sas_exit(), but recursively
delete device directory when we remove device driver.

Signed-off-by: Luo Jiaxing <luojiaxing@huawei.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Luo Jiaxing 2018-12-19 23:56:39 +08:00 committed by Martin K. Petersen
parent ad796f790c
commit ef63464bcf
3 changed files with 41 additions and 0 deletions
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9
drivers/scsi/hisi_sas/hisi_sas.h
View File

@ -14,6 +14,7 @@
#include <linux/acpi.h>
#include <linux/clk.h>
#include <linux/debugfs.h>
#include <linux/dmapool.h>
#include <linux/iopoll.h>
#include <linux/lcm.h>
@ -332,6 +333,8 @@ struct hisi_hba {
u32 phy_state;
u32 intr_coal_ticks; /* Time of interrupt coalesce in us */
u32 intr_coal_count; /* Interrupt count to coalesce */
struct dentry *debugfs_dir;
};
/* Generic HW DMA host memory structures */
@ -461,6 +464,10 @@ struct hisi_sas_slot_buf_table {
};
extern struct scsi_transport_template *hisi_sas_stt;
extern bool hisi_sas_debugfs_enable;
extern struct dentry *hisi_sas_debugfs_dir;
extern void hisi_sas_stop_phys(struct hisi_hba *hisi_hba);
extern int hisi_sas_alloc(struct hisi_hba *hisi_hba, struct Scsi_Host *shost);
extern void hisi_sas_free(struct hisi_hba *hisi_hba);
@ -493,4 +500,6 @@ extern void hisi_sas_release_tasks(struct hisi_hba *hisi_hba);
extern u8 hisi_sas_get_prog_phy_linkrate_mask(enum sas_linkrate max);
extern void hisi_sas_controller_reset_prepare(struct hisi_hba *hisi_hba);
extern void hisi_sas_controller_reset_done(struct hisi_hba *hisi_hba);
extern void hisi_sas_debugfs_init(struct hisi_hba *hisi_hba);
extern void hisi_sas_debugfs_exit(struct hisi_hba *hisi_hba);
#endif

27
drivers/scsi/hisi_sas/hisi_sas_main.c
View File

@ -2457,6 +2457,23 @@ err_out_ha:
}
EXPORT_SYMBOL_GPL(hisi_sas_probe);
struct dentry *hisi_sas_debugfs_dir;
void hisi_sas_debugfs_init(struct hisi_hba *hisi_hba)
{
struct device *dev = hisi_hba->dev;
hisi_hba->debugfs_dir = debugfs_create_dir(dev_name(dev),
hisi_sas_debugfs_dir);
}
EXPORT_SYMBOL_GPL(hisi_sas_debugfs_init);
void hisi_sas_debugfs_exit(struct hisi_hba *hisi_hba)
{
debugfs_remove_recursive(hisi_hba->debugfs_dir);
}
EXPORT_SYMBOL_GPL(hisi_sas_debugfs_exit);
int hisi_sas_remove(struct platform_device *pdev)
{
struct sas_ha_struct *sha = platform_get_drvdata(pdev);
@ -2475,18 +2492,28 @@ int hisi_sas_remove(struct platform_device *pdev)
}
EXPORT_SYMBOL_GPL(hisi_sas_remove);
bool hisi_sas_debugfs_enable;
EXPORT_SYMBOL_GPL(hisi_sas_debugfs_enable);
module_param_named(debugfs_enable, hisi_sas_debugfs_enable, bool, 0444);
MODULE_PARM_DESC(hisi_sas_debugfs_enable, "Enable driver debugfs (default disabled)");
static __init int hisi_sas_init(void)
{
hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
if (!hisi_sas_stt)
return -ENOMEM;
if (hisi_sas_debugfs_enable)
hisi_sas_debugfs_dir = debugfs_create_dir("hisi_sas", NULL);
return 0;
}
static __exit void hisi_sas_exit(void)
{
sas_release_transport(hisi_sas_stt);
debugfs_remove(hisi_sas_debugfs_dir);
}
module_init(hisi_sas_init);

5
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
View File

@ -2507,6 +2507,9 @@ hisi_sas_v3_probe(struct pci_dev *pdev, const struct pci_device_id *id)
sha->sas_port[i] = &hisi_hba->port[i].sas_port;
}
if (hisi_sas_debugfs_enable)
hisi_sas_debugfs_init(hisi_hba);
rc = scsi_add_host(shost, dev);
if (rc)
goto err_out_ha;
@ -2565,6 +2568,8 @@ static void hisi_sas_v3_remove(struct pci_dev *pdev)
struct hisi_hba *hisi_hba = sha->lldd_ha;
struct Scsi_Host *shost = sha->core.shost;
hisi_sas_debugfs_exit(hisi_hba);
if (timer_pending(&hisi_hba->timer))
del_timer(&hisi_hba->timer);