diff options
| author | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2007-09-29 10:41:58 +0200 |
|---|---|---|
| committer | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2007-10-17 00:00:08 +0200 |
| commit | a64408b96b5f67c2778958a230b5cfa3408a4a81 (patch) | |
| tree | 5dbd798b626f3693fa9950fa2a3b37e489aa6bbd /drivers/firewire/fw-cdev.c | |
| parent | 02ff8f8ee151e880414b99a11f67cae0cecd4977 (diff) | |
firewire: adopt read cycle timer ABI from raw1394
This duplicates the read cycle timer feature of raw1394 (added in Linux
2.6.21) in firewire-core's userspace ABI. The argument to the ioctl is
reordered though to ensure 32/64 bit compatibility.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Diffstat (limited to 'drivers/firewire/fw-cdev.c')
| -rw-r--r-- | drivers/firewire/fw-cdev.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/firewire/fw-cdev.c b/drivers/firewire/fw-cdev.c index b960fd996918..290d9f036199 100644 --- a/drivers/firewire/fw-cdev.c +++ b/drivers/firewire/fw-cdev.c @@ -25,11 +25,14 @@ #include <linux/device.h> #include <linux/vmalloc.h> #include <linux/poll.h> +#include <linux/preempt.h> +#include <linux/time.h> #include <linux/delay.h> #include <linux/mm.h> #include <linux/idr.h> #include <linux/compat.h> #include <linux/firewire-cdev.h> +#include <asm/system.h> #include <asm/uaccess.h> #include "fw-transaction.h" #include "fw-topology.h" @@ -811,6 +814,28 @@ static int ioctl_stop_iso(struct client *client, void *buffer) return fw_iso_context_stop(client->iso_context); } +static int ioctl_get_cycle_timer(struct client *client, void *buffer) +{ + struct fw_cdev_get_cycle_timer *request = buffer; + struct fw_card *card = client->device->card; + unsigned long long bus_time; + struct timeval tv; + unsigned long flags; + + preempt_disable(); + local_irq_save(flags); + + bus_time = card->driver->get_bus_time(card); + do_gettimeofday(&tv); + + local_irq_restore(flags); + preempt_enable(); + + request->local_time = tv.tv_sec * 1000000ULL + tv.tv_usec; + request->cycle_timer = bus_time & 0xffffffff; + return 0; +} + static int (* const ioctl_handlers[])(struct client *client, void *buffer) = { ioctl_get_info, ioctl_send_request, @@ -824,6 +849,7 @@ static int (* const ioctl_handlers[])(struct client *client, void *buffer) = { ioctl_queue_iso, ioctl_start_iso, ioctl_stop_iso, + ioctl_get_cycle_timer, }; static int |