提交 5f3b2878 编写于 作者: L Linus Torvalds

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6:
  ieee1394: silence defined but not used warning in non-modular builds
  ieee1394: rawiso: requeue packet for transmission after skipped cycle
......@@ -2167,6 +2167,7 @@ static const struct file_operations dv1394_fops=
/*
* Export information about protocols/devices supported by this driver.
*/
#ifdef MODULE
static struct ieee1394_device_id dv1394_id_table[] = {
{
.match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION,
......@@ -2177,6 +2178,7 @@ static struct ieee1394_device_id dv1394_id_table[] = {
};
MODULE_DEVICE_TABLE(ieee1394, dv1394_id_table);
#endif /* MODULE */
static struct hpsb_protocol_driver dv1394_driver = {
.name = "dv1394",
......
......@@ -123,6 +123,8 @@ struct hpsb_iso {
/* how many times the buffer has overflowed or underflowed */
atomic_t overflows;
/* how many cycles were skipped for a given context */
atomic_t skips;
/* Current number of bytes lost in discarded packets */
int bytes_discarded;
......
......@@ -1723,6 +1723,8 @@ struct ohci_iso_xmit {
struct dma_prog_region prog;
struct ohci1394_iso_tasklet task;
int task_active;
int last_cycle;
atomic_t skips;
u32 ContextControlSet;
u32 ContextControlClear;
......@@ -1759,6 +1761,8 @@ static int ohci_iso_xmit_init(struct hpsb_iso *iso)
iso->hostdata = xmit;
xmit->ohci = iso->host->hostdata;
xmit->task_active = 0;
xmit->last_cycle = -1;
atomic_set(&iso->skips, 0);
dma_prog_region_init(&xmit->prog);
......@@ -1856,6 +1860,26 @@ static void ohci_iso_xmit_task(unsigned long data)
/* parse cycle */
cycle = le32_to_cpu(cmd->output_last.status) & 0x1FFF;
if (xmit->last_cycle > -1) {
int cycle_diff = cycle - xmit->last_cycle;
int skip;
/* unwrap */
if (cycle_diff < 0) {
cycle_diff += 8000;
if (cycle_diff < 0)
PRINT(KERN_ERR, "bogus cycle diff %d\n",
cycle_diff);
}
skip = cycle_diff - 1;
if (skip > 0) {
DBGMSG("skipped %d cycles without packet loss", skip);
atomic_add(skip, &iso->skips);
}
}
xmit->last_cycle = cycle;
/* tell the subsystem the packet has gone out */
hpsb_iso_packet_sent(iso, cycle, event != 0x11);
......@@ -1943,6 +1967,16 @@ static int ohci_iso_xmit_queue(struct hpsb_iso *iso, struct hpsb_iso_packet_info
prev->output_last.branchAddress = cpu_to_le32(
dma_prog_region_offset_to_bus(&xmit->prog, sizeof(struct iso_xmit_cmd) * next_i) | 3);
/*
* Link the skip address to this descriptor itself. This causes a
* context to skip a cycle whenever lost cycles or FIFO overruns occur,
* without dropping the data at that point the application should then
* decide whether this is an error condition or not. Some protocols
* can deal with this by dropping some rate-matching padding packets.
*/
next->output_more_immediate.branchAddress =
prev->output_last.branchAddress;
/* disable interrupt, unless required by the IRQ interval */
if (prev_i % iso->irq_interval) {
prev->output_last.control &= cpu_to_le32(~(3 << 20)); /* no interrupt */
......
......@@ -2356,13 +2356,16 @@ static void rawiso_activity_cb(struct hpsb_iso *iso)
static void raw1394_iso_fill_status(struct hpsb_iso *iso,
struct raw1394_iso_status *stat)
{
int overflows = atomic_read(&iso->overflows);
int skips = atomic_read(&iso->skips);
stat->config.data_buf_size = iso->buf_size;
stat->config.buf_packets = iso->buf_packets;
stat->config.channel = iso->channel;
stat->config.speed = iso->speed;
stat->config.irq_interval = iso->irq_interval;
stat->n_packets = hpsb_iso_n_ready(iso);
stat->overflows = atomic_read(&iso->overflows);
stat->overflows = ((skips & 0xFFFF) << 16) | ((overflows & 0xFFFF));
stat->xmit_cycle = iso->xmit_cycle;
}
......@@ -2437,6 +2440,8 @@ static int raw1394_iso_get_status(struct file_info *fi, void __user * uaddr)
/* reset overflow counter */
atomic_set(&iso->overflows, 0);
/* reset skip counter */
atomic_set(&iso->skips, 0);
return 0;
}
......@@ -2935,6 +2940,7 @@ static int raw1394_release(struct inode *inode, struct file *file)
/*
* Export information about protocols/devices supported by this driver.
*/
#ifdef MODULE
static struct ieee1394_device_id raw1394_id_table[] = {
{
.match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION,
......@@ -2956,6 +2962,7 @@ static struct ieee1394_device_id raw1394_id_table[] = {
};
MODULE_DEVICE_TABLE(ieee1394, raw1394_id_table);
#endif /* MODULE */
static struct hpsb_protocol_driver raw1394_driver = {
.name = "raw1394",
......
......@@ -1293,6 +1293,7 @@ static const struct file_operations video1394_fops=
/*
* Export information about protocols/devices supported by this driver.
*/
#ifdef MODULE
static struct ieee1394_device_id video1394_id_table[] = {
{
.match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION,
......@@ -1313,6 +1314,7 @@ static struct ieee1394_device_id video1394_id_table[] = {
};
MODULE_DEVICE_TABLE(ieee1394, video1394_id_table);
#endif /* MODULE */
static struct hpsb_protocol_driver video1394_driver = {
.name = VIDEO1394_DRIVER_NAME,
......
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