[PATCH 44 of 53] ipath - allow diags on any unit

From: Bryan O'Sullivan
Date: Fri May 12 2006 - 19:52:32 EST

Previously, we hardwired all diags to unit 0.

Signed-off-by: Bryan O'Sullivan <bos@xxxxxxxxxxxxx>

diff -r 7634b2f0fc40 -r 28d938eb0463 drivers/infiniband/hw/ipath/ipath_diag.c
--- a/drivers/infiniband/hw/ipath/ipath_diag.c Fri May 12 15:55:29 2006 -0700
+++ b/drivers/infiniband/hw/ipath/ipath_diag.c Fri May 12 15:55:29 2006 -0700
@@ -66,18 +66,20 @@ static struct file_operations diag_file_
.release = ipath_diag_release
};

-static struct cdev *diag_cdev;
-static struct class_device *diag_class_dev;
-
-int ipath_diag_init(void)
-{
- return ipath_cdev_init(IPATH_DIAG_MINOR, "ipath_diag",
- &diag_file_ops, &diag_cdev, &diag_class_dev);
-}
-
-void ipath_diag_cleanup(void)
-{
- ipath_cdev_cleanup(&diag_cdev, &diag_class_dev);
+int ipath_diag_add(struct ipath_devdata *dd)
+{
+ char name[16];
+
+ snprintf(name, sizeof(name), "ipath_diag%d", dd->ipath_unit);
+
+ return ipath_cdev_init(IPATH_DIAG_MINOR_BASE + dd->ipath_unit, name,
+ &diag_file_ops, &dd->diag_cdev,
+ &dd->diag_class_dev);
+}
+
+void ipath_diag_remove(struct ipath_devdata *dd)
+{
+ ipath_cdev_cleanup(&dd->diag_cdev, &dd->diag_class_dev);
}

/**
@@ -101,8 +103,7 @@ static int ipath_read_umem64(struct ipat
int ret;

/* not very efficient, but it works for now */
- if (reg_addr < dd->ipath_kregbase ||
- reg_end > dd->ipath_kregend) {
+ if (reg_addr < dd->ipath_kregbase || reg_end > dd->ipath_kregend) {
ret = -EINVAL;
goto bail;
}
@@ -139,8 +140,7 @@ static int ipath_write_umem64(struct ipa
int ret;

/* not very efficient, but it works for now */
- if (reg_addr < dd->ipath_kregbase ||
- reg_end > dd->ipath_kregend) {
+ if (reg_addr < dd->ipath_kregbase || reg_end > dd->ipath_kregend) {
ret = -EINVAL;
goto bail;
}
@@ -240,59 +240,45 @@ bail:

static int ipath_diag_open(struct inode *in, struct file *fp)
{
+ int unit = iminor(in) - IPATH_DIAG_MINOR_BASE;
struct ipath_devdata *dd;
- int unit = 0; /* XXX this is bogus */
- unsigned long flags;
- int ret;
-
- dd = ipath_lookup(unit);
+ int ret;

mutex_lock(&ipath_mutex);
- spin_lock_irqsave(&ipath_devs_lock, flags);

if (ipath_diag_inuse) {
ret = -EBUSY;
goto bail;
}

- list_for_each_entry(dd, &ipath_dev_list, ipath_list) {
- /*
- * we need at least one infinipath device to be present
- * (don't use INITTED, because we want to be able to open
- * even if device is in freeze mode, which cleared INITTED).
- * There is a small amount of risk to this, which is why we
- * also verify kregbase is set.
- */
-
- if (!(dd->ipath_flags & IPATH_PRESENT) ||
- !dd->ipath_kregbase)
- continue;
-
- ipath_diag_inuse = 1;
- diag_set_link = 0;
- ret = 0;
- goto bail;
- }
-
- ret = -ENODEV;
-
-bail:
- spin_unlock_irqrestore(&ipath_devs_lock, flags);
+ dd = ipath_lookup(unit);
+
+ if (dd == NULL || !(dd->ipath_flags & IPATH_PRESENT) ||
+ !dd->ipath_kregbase) {
+ ret = -ENODEV;
+ goto bail;
+ }
+
+ fp->private_data = dd;
+ ipath_diag_inuse = 1;
+ diag_set_link = 0;
+ ret = 0;

/* Only expose a way to reset the device if we
make it into diag mode. */
- if (ret == 0)
- ipath_expose_reset(&dd->pcidev->dev);
-
+ ipath_expose_reset(&dd->pcidev->dev);
+
+bail:
mutex_unlock(&ipath_mutex);

return ret;
}

-static int ipath_diag_release(struct inode *i, struct file *f)
+static int ipath_diag_release(struct inode *in, struct file *fp)
{
mutex_lock(&ipath_mutex);
ipath_diag_inuse = 0;
+ fp->private_data = NULL;
mutex_unlock(&ipath_mutex);
return 0;
}
@@ -300,16 +286,9 @@ static ssize_t ipath_diag_read(struct fi
static ssize_t ipath_diag_read(struct file *fp, char __user *data,
size_t count, loff_t *off)
{
- int unit = 0; /* XXX provide for reads on other units some day */
- struct ipath_devdata *dd;
+ struct ipath_devdata *dd = fp->private_data;
void __iomem *kreg_base;
ssize_t ret;
-
- dd = ipath_lookup(unit);
- if (!dd) {
- ret = -ENODEV;
- goto bail;
- }

kreg_base = dd->ipath_kregbase;

@@ -329,23 +308,16 @@ static ssize_t ipath_diag_read(struct fi
ret = count;
}

-bail:
return ret;
}

static ssize_t ipath_diag_write(struct file *fp, const char __user *data,
size_t count, loff_t *off)
{
- int unit = 0; /* XXX this is bogus */
- struct ipath_devdata *dd;
+ struct ipath_devdata *dd = fp->private_data;
void __iomem *kreg_base;
ssize_t ret;

- dd = ipath_lookup(unit);
- if (!dd) {
- ret = -ENODEV;
- goto bail;
- }
kreg_base = dd->ipath_kregbase;

if (count == 0)
@@ -364,6 +336,6 @@ static ssize_t ipath_diag_write(struct f
ret = count;
}

-bail:
- return ret;
-}
+ return ret;
+}
+
diff -r 7634b2f0fc40 -r 28d938eb0463 drivers/infiniband/hw/ipath/ipath_driver.c
--- a/drivers/infiniband/hw/ipath/ipath_driver.c Fri May 12 15:55:29 2006 -0700
+++ b/drivers/infiniband/hw/ipath/ipath_driver.c Fri May 12 15:55:29 2006 -0700
@@ -488,6 +488,7 @@ static int __devinit ipath_init_one(stru
ipath_device_create_group(&pdev->dev, dd);
ipathfs_add_device(dd);
ipath_user_add(dd);
+ ipath_diag_add(dd);
ipath_layer_add(dd);

goto bail;
@@ -517,8 +518,9 @@ static void __devexit ipath_remove_one(s
return;

dd = pci_get_drvdata(pdev);
- ipath_layer_del(dd);
- ipath_user_del(dd);
+ ipath_layer_remove(dd);
+ ipath_diag_remove(dd);
+ ipath_user_remove(dd);
ipathfs_remove_device(dd);
ipath_device_remove_group(&pdev->dev, dd);
ipath_cdbg(VERBOSE, "Releasing pci memory regions, dd %p, "
diff -r 7634b2f0fc40 -r 28d938eb0463 drivers/infiniband/hw/ipath/ipath_file_ops.c
--- a/drivers/infiniband/hw/ipath/ipath_file_ops.c Fri May 12 15:55:29 2006 -0700
+++ b/drivers/infiniband/hw/ipath/ipath_file_ops.c Fri May 12 15:55:29 2006 -0700
@@ -1390,16 +1390,16 @@ done:

static int ipath_open(struct inode *in, struct file *fp)
{
- int ret, minor;
+ int ret, user_minor;

mutex_lock(&ipath_mutex);

- minor = iminor(in);
+ user_minor = iminor(in) - IPATH_USER_MINOR_BASE;
ipath_cdbg(VERBOSE, "open on dev %lx (minor %d)\n",
- (long)in->i_rdev, minor);
-
- if (minor)
- ret = find_free_port(minor - 1, fp);
+ (long)in->i_rdev, user_minor);
+
+ if (user_minor)
+ ret = find_free_port(user_minor - 1, fp);
else
ret = find_best_unit(fp);

@@ -1799,19 +1799,13 @@ int ipath_user_add(struct ipath_devdata
"error %d\n", -ret);
goto bail;
}
- ret = ipath_diag_init();
- if (ret < 0) {
- ipath_dev_err(dd, "Unable to set up diag support: "
- "error %d\n", -ret);
- goto bail_sma;
- }

ret = init_cdev(0, "ipath", &ipath_file_ops, &wildcard_cdev,
&wildcard_class_dev);
if (ret < 0) {
ipath_dev_err(dd, "Could not create wildcard "
"minor: error %d\n", -ret);
- goto bail_diag;
+ goto bail_sma;
}

atomic_set(&user_setup, 1);
@@ -1820,31 +1814,28 @@ int ipath_user_add(struct ipath_devdata
snprintf(name, sizeof(name), "ipath%d", dd->ipath_unit);

ret = init_cdev(dd->ipath_unit + 1, name, &ipath_file_ops,
- &dd->cdev, &dd->class_dev);
+ &dd->user_cdev, &dd->user_class_dev);
if (ret < 0)
ipath_dev_err(dd, "Could not create user minor %d, %s\n",
dd->ipath_unit + 1, name);

goto bail;

-bail_diag:
- ipath_diag_cleanup();
bail_sma:
user_cleanup();
bail:
return ret;
}

-void ipath_user_del(struct ipath_devdata *dd)
-{
- cleanup_cdev(&dd->cdev, &dd->class_dev);
+void ipath_user_remove(struct ipath_devdata *dd)
+{
+ cleanup_cdev(&dd->user_cdev, &dd->user_class_dev);

if (atomic_dec_return(&user_count) == 0) {
if (atomic_read(&user_setup) == 0)
goto bail;

cleanup_cdev(&wildcard_cdev, &wildcard_class_dev);
- ipath_diag_cleanup();
user_cleanup();

atomic_set(&user_setup, 0);
diff -r 7634b2f0fc40 -r 28d938eb0463 drivers/infiniband/hw/ipath/ipath_kernel.h
--- a/drivers/infiniband/hw/ipath/ipath_kernel.h Fri May 12 15:55:29 2006 -0700
+++ b/drivers/infiniband/hw/ipath/ipath_kernel.h Fri May 12 15:55:29 2006 -0700
@@ -347,8 +347,10 @@ struct ipath_devdata {
char *ipath_freezemsg;
/* pci access data structure */
struct pci_dev *pcidev;
- struct cdev *cdev;
- struct class_device *class_dev;
+ struct cdev *user_cdev;
+ struct cdev *diag_cdev;
+ struct class_device *user_class_dev;
+ struct class_device *diag_class_dev;
/* timer used to prevent stats overflow, error throttling, etc. */
struct timer_list ipath_stats_timer;
/* check for stale messages in rcv queue */
@@ -531,7 +533,7 @@ extern int __ipath_verbs_rcv(struct ipat
extern int __ipath_verbs_rcv(struct ipath_devdata *, void *, void *, u32);

void ipath_layer_add(struct ipath_devdata *);
-void ipath_layer_del(struct ipath_devdata *);
+void ipath_layer_remove(struct ipath_devdata *);

int ipath_init_chip(struct ipath_devdata *, int);
int ipath_enable_wc(struct ipath_devdata *dd);
@@ -545,14 +547,14 @@ void ipath_cdev_cleanup(struct cdev **cd
void ipath_cdev_cleanup(struct cdev **cdevp,
struct class_device **class_devp);

-int ipath_diag_init(void);
-void ipath_diag_cleanup(void);
+int ipath_diag_add(struct ipath_devdata *);
+void ipath_diag_remove(struct ipath_devdata *);
void ipath_diag_bringup_link(struct ipath_devdata *);

extern wait_queue_head_t ipath_sma_state_wait;

int ipath_user_add(struct ipath_devdata *dd);
-void ipath_user_del(struct ipath_devdata *dd);
+void ipath_user_remove(struct ipath_devdata *dd);

struct sk_buff *ipath_alloc_skb(struct ipath_devdata *dd, gfp_t);

@@ -831,9 +833,10 @@ extern struct mutex ipath_mutex;

#define IPATH_DRV_NAME "ipath_core"
#define IPATH_MAJOR 233
+#define IPATH_USER_MINOR_BASE 0
#define IPATH_SMA_MINOR 128
-#define IPATH_DIAG_MINOR 129
-#define IPATH_NMINORS 130
+#define IPATH_DIAG_MINOR_BASE 129
+#define IPATH_NMINORS 255

#define ipath_dev_err(dd,fmt,...) \
do { \
diff -r 7634b2f0fc40 -r 28d938eb0463 drivers/infiniband/hw/ipath/ipath_layer.c
--- a/drivers/infiniband/hw/ipath/ipath_layer.c Fri May 12 15:55:29 2006 -0700
+++ b/drivers/infiniband/hw/ipath/ipath_layer.c Fri May 12 15:55:29 2006 -0700
@@ -402,7 +402,7 @@ void ipath_layer_add(struct ipath_devdat
mutex_unlock(&ipath_layer_mutex);
}

-void ipath_layer_del(struct ipath_devdata *dd)
+void ipath_layer_remove(struct ipath_devdata *dd)
{
mutex_lock(&ipath_layer_mutex);

-
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