static unsigned sipc5_get_pad_len(struct sipc5_link_hdr *hdr, unsigned len)
{
return (hdr->cfg & SIPC5_HDR_PAD) ? sipc5_calc_padding_size(len) : 0;
}
/*
ret < 0 : error
ret == 0 : no data
ret > 0 : valid data
*/
static int dpram_ipc_recv_data_with_skb(struct dpram_link_device *dpld, int dev)
{
struct link_device *ld = &dpld->ld;
struct io_device *iod = dpld->iod[dev];
struct sk_buff *skb;
u8 __iomem *src = get_rx_buff(dpld, dev);
u32 qsize = get_rx_buff_size(dpld, dev);
u32 in;
u32 out;
u32 rcvd;
int rest;
u8 *frm;
u8 *dst;
unsigned int len;
unsigned int pad;
unsigned int tot;
struct mif_irq_map map;
rcvd = dpram_get_rxq_rcvd(dpld, dev, qsize, &in, &out);
if (rcvd <= 0)
return rcvd;
if (dev == IPC_FMT) {
set_dpram_map(dpld, &map);
mif_irq_log(ld->mc->msd, map, "ipc_recv", sizeof("ipc_recv"));
}
rest = rcvd;
while (rest > 0) {
frm = src + out;
if (unlikely(!sipc5_start_valid(frm[0]))) {
mif_err("%s: ERR! %s invalid start 0x%02X\n",
ld->name, get_dev_name(dev), frm[0]);
skb_queue_purge(&dpld->skb_rxq[dev]);
return -EBADMSG;
}
len = sipc5_get_frame_sz16(frm);
if (unlikely(len > rest)) {
mif_err("%s: ERR! %s len %d > rest %d\n",
ld->name, get_dev_name(dev), len, rest);
skb_queue_purge(&dpld->skb_rxq[dev]);
return -EBADMSG;
}
pad = sipc5_calc_padding_size(len);
tot = len + pad;
/* Allocate an skb */
skb = dev_alloc_skb(tot);
if (!skb) {
mif_err("%s: ERR! %s dev_alloc_skb fail\n",
ld->name, get_dev_name(dev));
return -ENOMEM;
}
/* Read data from each DPRAM buffer */
dst = skb_put(skb, tot);
dpram_ipc_read(dpld, dev, dst, src, out, tot, qsize);
skb_trim(skb, len);
iod->recv_skb(iod, ld, skb);
/* Calculate and set new out */
rest -= tot;
out += tot;
if (out >= qsize)
out -= qsize;
}
set_rx_tail(dpld, dev, out);
return rcvd;
}
