*/
#include "i1480u-wlp.h"
-#define D_LOCAL 5
-#include <linux/uwb/debug.h>
enum {
/* This is only for Next and Last TX packets */
- sizeof(struct untd_hdr_rst),
};
-/** Free resources allocated to a i1480u tx context. */
+/* Free resources allocated to a i1480u tx context. */
static
void i1480u_tx_free(struct i1480u_tx *wtx)
{
}
-/**
+/*
* Callback for a completed tx USB URB.
*
* TODO:
<= i1480u->tx_inflight.threshold
&& netif_queue_stopped(net_dev)
&& i1480u->tx_inflight.threshold != 0) {
- if (d_test(2) && printk_ratelimit())
- d_printf(2, dev, "Restart queue. \n");
netif_start_queue(net_dev);
atomic_inc(&i1480u->tx_inflight.restart_count);
}
}
-/**
+/*
* Given a buffer that doesn't fit in a single fragment, create an
* scatter/gather structure for delivery to the USB pipe.
*
/* Now do each remaining fragment */
result = -EINVAL;
while (pl_size_left > 0) {
- d_printf(5, NULL, "ITR HDR: pl_size_left %zu buf_itr %zu\n",
- pl_size_left, buf_itr - wtx->buf);
if (buf_itr + sizeof(*untd_hdr_rst) - wtx->buf
> wtx->buf_size) {
printk(KERN_ERR "BUG: no space for header\n");
goto error_bug;
}
- d_printf(5, NULL, "ITR HDR 2: pl_size_left %zu buf_itr %zu\n",
- pl_size_left, buf_itr - wtx->buf);
untd_hdr_rst = buf_itr;
buf_itr += sizeof(*untd_hdr_rst);
if (pl_size_left > i1480u_MAX_PL_SIZE) {
frg_pl_size = pl_size_left;
untd_hdr_set_type(&untd_hdr_rst->hdr, i1480u_PKT_FRAG_LST);
}
- d_printf(5, NULL,
- "ITR PL: pl_size_left %zu buf_itr %zu frg_pl_size %zu\n",
- pl_size_left, buf_itr - wtx->buf, frg_pl_size);
untd_hdr_set_rx_tx(&untd_hdr_rst->hdr, 0);
untd_hdr_rst->hdr.len = cpu_to_le16(frg_pl_size);
untd_hdr_rst->padding = 0;
buf_itr += frg_pl_size;
pl_itr += frg_pl_size;
pl_size_left -= frg_pl_size;
- d_printf(5, NULL,
- "ITR PL 2: pl_size_left %zu buf_itr %zu frg_pl_size %zu\n",
- pl_size_left, buf_itr - wtx->buf, frg_pl_size);
}
dev_kfree_skb_irq(skb);
return 0;
}
-/**
+/*
* Given a buffer that fits in a single fragment, fill out a @wtx
* struct for transmitting it down the USB pipe.
*
}
-/**
+/*
* Given a skb to transmit, massage it to become palatable for the TX pipe
*
* This will break the buffer in chunks smaller than
return NULL;
}
-/**
+/*
* Actual fragmentation and transmission of frame
*
* @wlp: WLP substack data structure
struct i1480u_tx *wtx;
struct wlp_tx_hdr *wlp_tx_hdr;
static unsigned char dev_bcast[2] = { 0xff, 0xff };
-#if 0
- int lockup = 50;
-#endif
- d_fnstart(6, dev, "(skb %p (%u), net_dev %p)\n", skb, skb->len,
- net_dev);
BUG_ON(i1480u->wlp.rc == NULL);
if ((net_dev->flags & IFF_UP) == 0)
goto out;
result = -EBUSY;
if (atomic_read(&i1480u->tx_inflight.count) >= i1480u->tx_inflight.max) {
- if (d_test(2) && printk_ratelimit())
- d_printf(2, dev, "Max frames in flight "
- "stopping queue.\n");
netif_stop_queue(net_dev);
goto error_max_inflight;
}
wlp_tx_hdr_set_delivery_id_type(wlp_tx_hdr, i1480u->options.pca_base_priority);
}
-#if 0
- dev_info(dev, "TX delivering skb -> USB, %zu bytes\n", skb->len);
- dump_bytes(dev, skb->data, skb->len > 72 ? 72 : skb->len);
-#endif
-#if 0
- /* simulates a device lockup after every lockup# packets */
- if (lockup && ((i1480u->stats.tx_packets + 1) % lockup) == 0) {
- /* Simulate a dropped transmit interrupt */
- net_dev->trans_start = jiffies;
- netif_stop_queue(net_dev);
- dev_err(dev, "Simulate lockup at %ld\n", jiffies);
- return result;
- }
-#endif
-
result = usb_submit_urb(wtx->urb, GFP_ATOMIC); /* Go baby */
if (result < 0) {
dev_err(dev, "TX: cannot submit URB: %d\n", result);
}
atomic_inc(&i1480u->tx_inflight.count);
net_dev->trans_start = jiffies;
- d_fnend(6, dev, "(skb %p (%u), net_dev %p) = %d\n", skb, skb->len,
- net_dev, result);
return result;
error_tx_urb_submit:
error_wtx_alloc:
error_max_inflight:
out:
- d_fnend(6, dev, "(skb %p (%u), net_dev %p) = %d\n", skb, skb->len,
- net_dev, result);
return result;
}
-/**
+/*
* Transmit an skb Called when an skbuf has to be transmitted
*
* The skb is first passed to WLP substack to ensure this is a valid
struct device *dev = &i1480u->usb_iface->dev;
struct uwb_dev_addr dst;
- d_fnstart(6, dev, "(skb %p (%u), net_dev %p)\n", skb, skb->len,
- net_dev);
- BUG_ON(i1480u->wlp.rc == NULL);
if ((net_dev->flags & IFF_UP) == 0)
goto error;
result = wlp_prepare_tx_frame(dev, &i1480u->wlp, skb, &dst);
"Dropping packet.\n", result);
goto error;
} else if (result == 1) {
- d_printf(6, dev, "WLP will transmit frame. \n");
/* trans_start time will be set when WLP actually transmits
* the frame */
goto out;
}
- d_printf(6, dev, "Transmitting frame. \n");
result = i1480u_xmit_frame(&i1480u->wlp, skb, &dst);
if (result < 0) {
dev_err(dev, "Frame TX failed (%d).\n", result);
goto error;
}
- d_fnend(6, dev, "(skb %p (%u), net_dev %p) = %d\n", skb, skb->len,
- net_dev, result);
return NETDEV_TX_OK;
error:
dev_kfree_skb_any(skb);
i1480u->stats.tx_dropped++;
out:
- d_fnend(6, dev, "(skb %p (%u), net_dev %p) = %d\n", skb, skb->len,
- net_dev, result);
return NETDEV_TX_OK;
}
-/**
+/*
* Called when a pkt transmission doesn't complete in a reasonable period
* Device reset may sleep - do it outside of interrupt context (delayed)
*/
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff