From a2acb2ff36876fdfa5f7a8bf811765aadc74c1c1 Mon Sep 17 00:00:00 2001 From: Bryan O'Sullivan Date: Sat, 1 Jul 2006 04:35:52 -0700 Subject: [PATCH] IB/ipath: allow diags on any unit There is no longer a /dev/ipath_diag file; instead, there's /dev/ipath_diag0, 1, etc. It's still not possible to have diags run on more than one unit at a time, but that's easy to fix at some point. Signed-off-by: Bryan O'Sullivan Cc: "Michael S. Tsirkin" Cc: Roland Dreier Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/infiniband/hw/ipath/ipath_diag.c | 85 +++++++++------------------- drivers/infiniband/hw/ipath/ipath_driver.c | 6 +- drivers/infiniband/hw/ipath/ipath_file_ops.c | 28 +++------ drivers/infiniband/hw/ipath/ipath_kernel.h | 19 ++++--- drivers/infiniband/hw/ipath/ipath_layer.c | 2 +- 5 files changed, 53 insertions(+), 87 deletions(-) (limited to 'drivers') diff --git a/drivers/infiniband/hw/ipath/ipath_diag.c b/drivers/infiniband/hw/ipath/ipath_diag.c index 0fcd507e7c7d..d7f17f2a436c 100644 --- a/drivers/infiniband/hw/ipath/ipath_diag.c +++ b/drivers/infiniband/hw/ipath/ipath_diag.c @@ -67,18 +67,20 @@ static struct file_operations diag_file_ops = { .release = ipath_diag_release }; -static struct cdev *diag_cdev; -static struct class_device *diag_class_dev; - -int ipath_diag_init(void) +int ipath_diag_add(struct ipath_devdata *dd) { - return ipath_cdev_init(IPATH_DIAG_MINOR, "ipath_diag", - &diag_file_ops, &diag_cdev, &diag_class_dev); + 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_cleanup(void) +void ipath_diag_remove(struct ipath_devdata *dd) { - ipath_cdev_cleanup(&diag_cdev, &diag_class_dev); + ipath_cdev_cleanup(&dd->diag_cdev, &dd->diag_class_dev); } /** @@ -102,8 +104,7 @@ static int ipath_read_umem64(struct ipath_devdata *dd, void __user *uaddr, 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; } @@ -140,8 +141,7 @@ static int ipath_write_umem64(struct ipath_devdata *dd, void __iomem *caddr, 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); - 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; + dd = ipath_lookup(unit); + + if (dd == NULL || !(dd->ipath_flags & IPATH_PRESENT) || + !dd->ipath_kregbase) { + ret = -ENODEV; goto bail; } - ret = -ENODEV; - -bail: - spin_unlock_irqrestore(&ipath_devs_lock, flags); + 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; } @@ -300,17 +286,10 @@ static int ipath_diag_release(struct inode *i, struct file *f) 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; if (count == 0) @@ -329,23 +308,16 @@ static ssize_t ipath_diag_read(struct file *fp, char __user *data, 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 +336,5 @@ static ssize_t ipath_diag_write(struct file *fp, const char __user *data, ret = count; } -bail: return ret; } diff --git a/drivers/infiniband/hw/ipath/ipath_driver.c b/drivers/infiniband/hw/ipath/ipath_driver.c index 05e00ba656e2..0a93e2282beb 100644 --- a/drivers/infiniband/hw/ipath/ipath_driver.c +++ b/drivers/infiniband/hw/ipath/ipath_driver.c @@ -546,6 +546,7 @@ static int __devinit ipath_init_one(struct pci_dev *pdev, 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; @@ -578,8 +579,9 @@ static void __devexit ipath_remove_one(struct pci_dev *pdev) 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 --git a/drivers/infiniband/hw/ipath/ipath_file_ops.c b/drivers/infiniband/hw/ipath/ipath_file_ops.c index 8ff97e4f97db..cd2d5cd05e88 100644 --- a/drivers/infiniband/hw/ipath/ipath_file_ops.c +++ b/drivers/infiniband/hw/ipath/ipath_file_ops.c @@ -1443,16 +1443,16 @@ 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); + (long)in->i_rdev, user_minor); - if (minor) - ret = find_free_port(minor - 1, fp); + if (user_minor) + ret = find_free_port(user_minor - 1, fp); else ret = find_best_unit(fp); @@ -1860,19 +1860,12 @@ int ipath_user_add(struct ipath_devdata *dd) "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); @@ -1881,31 +1874,28 @@ int ipath_user_add(struct ipath_devdata *dd) 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) +void ipath_user_remove(struct ipath_devdata *dd) { - cleanup_cdev(&dd->cdev, &dd->class_dev); + 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 --git a/drivers/infiniband/hw/ipath/ipath_kernel.h b/drivers/infiniband/hw/ipath/ipath_kernel.h index 57dea8c443be..412480d1109f 100644 --- a/drivers/infiniband/hw/ipath/ipath_kernel.h +++ b/drivers/infiniband/hw/ipath/ipath_kernel.h @@ -355,8 +355,10 @@ 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 */ @@ -538,7 +540,7 @@ extern int __ipath_verbs_piobufavail(struct ipath_devdata *); 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); @@ -552,14 +554,14 @@ int ipath_cdev_init(int minor, char *name, struct file_operations *fops, 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); @@ -843,9 +845,10 @@ 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 --git a/drivers/infiniband/hw/ipath/ipath_layer.c b/drivers/infiniband/hw/ipath/ipath_layer.c index fd95b5516409..bb15b17a4225 100644 --- a/drivers/infiniband/hw/ipath/ipath_layer.c +++ b/drivers/infiniband/hw/ipath/ipath_layer.c @@ -404,7 +404,7 @@ void ipath_layer_add(struct ipath_devdata *dd) 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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