diff options
| -rw-r--r-- | drivers/pci/hotplug/cpqphp.h | 8 | ||||
| -rw-r--r-- | drivers/pci/hotplug/cpqphp_core.c | 6 | ||||
| -rw-r--r-- | drivers/pci/hotplug/cpqphp_sysfs.c | 138 |
3 files changed, 127 insertions, 25 deletions
diff --git a/drivers/pci/hotplug/cpqphp.h b/drivers/pci/hotplug/cpqphp.h index 092491e..cb88404 100644 --- a/drivers/pci/hotplug/cpqphp.h +++ b/drivers/pci/hotplug/cpqphp.h @@ -317,6 +317,7 @@ struct controller { u16 vendor_id; struct work_struct int_task_event; wait_queue_head_t queue; /* sleep & wake process */ + struct dentry *dentry; /* debugfs dentry */ }; struct irq_mapping { @@ -399,8 +400,11 @@ struct resource_lists { #define msg_button_ignore "PCI slot #%d - button press ignored. (action in progress...)\n" -/* sysfs functions for the hotplug controller info */ -extern void cpqhp_create_ctrl_files (struct controller *ctrl); +/* debugfs functions for the hotplug controller info */ +extern void cpqhp_initialize_debugfs (void); +extern void cpqhp_shutdown_debugfs (void); +extern void cpqhp_create_debugfs_files (struct controller *ctrl); +extern void cpqhp_remove_debugfs_files (struct controller *ctrl); /* controller functions */ extern void cpqhp_pushbutton_thread (unsigned long event_pointer); diff --git a/drivers/pci/hotplug/cpqphp_core.c b/drivers/pci/hotplug/cpqphp_core.c index d364470..b3659ff 100644 --- a/drivers/pci/hotplug/cpqphp_core.c +++ b/drivers/pci/hotplug/cpqphp_core.c @@ -479,6 +479,8 @@ static int ctrl_slot_cleanup (struct controller * ctrl) old_slot = next_slot; } + cpqhp_remove_debugfs_files(ctrl); + //Free IRQ associated with hot plug device free_irq(ctrl->interrupt, ctrl); //Unmap the memory @@ -1275,7 +1277,7 @@ static int cpqhpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent) // Done with exclusive hardware access up(&ctrl->crit_sect); - cpqhp_create_ctrl_files(ctrl); + cpqhp_create_debugfs_files(ctrl); return 0; @@ -1515,6 +1517,7 @@ static int __init cpqhpc_init(void) cpqhp_debug = debug; info (DRIVER_DESC " version: " DRIVER_VERSION "\n"); + cpqhp_initialize_debugfs(); result = pci_register_driver(&cpqhpc_driver); dbg("pci_register_driver = %d\n", result); return result; @@ -1528,6 +1531,7 @@ static void __exit cpqhpc_cleanup(void) dbg("pci_unregister_driver\n"); pci_unregister_driver(&cpqhpc_driver); + cpqhp_shutdown_debugfs(); } diff --git a/drivers/pci/hotplug/cpqphp_sysfs.c b/drivers/pci/hotplug/cpqphp_sysfs.c index 4c11048..bbfeed7 100644 --- a/drivers/pci/hotplug/cpqphp_sysfs.c +++ b/drivers/pci/hotplug/cpqphp_sysfs.c @@ -33,22 +33,15 @@ #include <linux/proc_fs.h> #include <linux/workqueue.h> #include <linux/pci.h> +#include <linux/debugfs.h> #include "cpqphp.h" - -/* A few routines that create sysfs entries for the hot plug controller */ - -static ssize_t show_ctrl (struct device *dev, struct device_attribute *attr, char *buf) +static int show_ctrl (struct controller *ctrl, char *buf) { - struct pci_dev *pci_dev; - struct controller *ctrl; - char * out = buf; + char *out = buf; int index; struct pci_resource *res; - pci_dev = container_of (dev, struct pci_dev, dev); - ctrl = pci_get_drvdata(pci_dev); - out += sprintf(buf, "Free resources: memory\n"); index = 11; res = ctrl->mem_head; @@ -80,22 +73,16 @@ static ssize_t show_ctrl (struct device *dev, struct device_attribute *attr, cha return out - buf; } -static DEVICE_ATTR (ctrl, S_IRUGO, show_ctrl, NULL); -static ssize_t show_dev (struct device *dev, struct device_attribute *attr, char *buf) +static int show_dev (struct controller *ctrl, char *buf) { - struct pci_dev *pci_dev; - struct controller *ctrl; char * out = buf; int index; struct pci_resource *res; struct pci_func *new_slot; struct slot *slot; - pci_dev = container_of (dev, struct pci_dev, dev); - ctrl = pci_get_drvdata(pci_dev); - - slot=ctrl->slot; + slot = ctrl->slot; while (slot) { new_slot = cpqhp_slot_find(slot->bus, slot->device, 0); @@ -134,10 +121,117 @@ static ssize_t show_dev (struct device *dev, struct device_attribute *attr, char return out - buf; } -static DEVICE_ATTR (dev, S_IRUGO, show_dev, NULL); -void cpqhp_create_ctrl_files (struct controller *ctrl) +static int spew_debug_info(struct controller *ctrl, char *data, int size) { - device_create_file (&ctrl->pci_dev->dev, &dev_attr_ctrl); - device_create_file (&ctrl->pci_dev->dev, &dev_attr_dev); + int used; + + used = size - show_ctrl(ctrl, data); + used = (size - used) - show_dev(ctrl, &data[used]); + return used; +} + +struct ctrl_dbg { + int size; + char *data; + struct controller *ctrl; +}; + +#define MAX_OUTPUT (4*PAGE_SIZE) + +static int open(struct inode *inode, struct file *file) +{ + struct controller *ctrl = inode->u.generic_ip; + struct ctrl_dbg *dbg; + int retval = -ENOMEM; + + lock_kernel(); + dbg = kmalloc(sizeof(*dbg), GFP_KERNEL); + if (!dbg) + goto exit; + dbg->data = kmalloc(MAX_OUTPUT, GFP_KERNEL); + if (!dbg->data) { + kfree(dbg); + goto exit; + } + dbg->size = spew_debug_info(ctrl, dbg->data, MAX_OUTPUT); + file->private_data = dbg; + retval = 0; +exit: + unlock_kernel(); + return retval; +} + +static loff_t lseek(struct file *file, loff_t off, int whence) +{ + struct ctrl_dbg *dbg; + loff_t new = -1; + + lock_kernel(); + dbg = file->private_data; + + switch (whence) { + case 0: + new = off; + break; + case 1: + new = file->f_pos + off; + break; + } + if (new < 0 || new > dbg->size) { + unlock_kernel(); + return -EINVAL; + } + unlock_kernel(); + return (file->f_pos = new); } + +static ssize_t read(struct file *file, char __user *buf, + size_t nbytes, loff_t *ppos) +{ + struct ctrl_dbg *dbg = file->private_data; + return simple_read_from_buffer(buf, nbytes, ppos, dbg->data, dbg->size); +} + +static int release(struct inode *inode, struct file *file) +{ + struct ctrl_dbg *dbg = file->private_data; + + kfree(dbg->data); + kfree(dbg); + return 0; +} + +static struct file_operations debug_ops = { + .owner = THIS_MODULE, + .open = open, + .llseek = lseek, + .read = read, + .release = release, +}; + +static struct dentry *root; + +void cpqhp_initialize_debugfs(void) +{ + if (!root) + root = debugfs_create_dir("cpqhp", NULL); +} + +void cpqhp_shutdown_debugfs(void) +{ + debugfs_remove(root); +} + +void cpqhp_create_debugfs_files(struct controller *ctrl) +{ + ctrl->dentry = debugfs_create_file(ctrl->pci_dev->dev.bus_id, S_IRUGO, root, ctrl, &debug_ops); +} + +void cpqhp_remove_debugfs_files(struct controller *ctrl) +{ + if (ctrl->dentry) + debugfs_remove(ctrl->dentry); + ctrl->dentry = NULL; +} + |
