/*
ret < 0 : error
ret == 0 : no data
ret > 0 : valid data
*/
static int dpram_ipc_recv_data(struct dpram_link_device *dpld, int dev)
{
struct link_device *ld = &dpld->ld;
struct dpram_rxb *rxb;
u8 __iomem *src = get_rx_buff(dpld, dev);
u32 qsize = get_rx_buff_size(dpld, dev);
u32 in = get_rx_head(dpld, dev);
u32 out = get_rx_tail(dpld, dev);
u32 rcvd = 0;
struct mif_irq_map map;
if (in == out)
return 0;
if (dev == IPC_FMT) {
set_dpram_map(dpld, &map);
mif_irq_log(ld->mc->msd, map, "ipc_recv", sizeof("ipc_recv"));
}
/* Get data length in DPRAM*/
rcvd = (in > out) ? (in - out) : (qsize - out + in);
mif_debug("%s: %s qsize[%u] in[%u] out[%u] rcvd[%u]\n",
ld->name, get_dev_name(dev), qsize, in, out, rcvd);
/* Check each queue */
if (!dpram_circ_valid(qsize, in, out)) {
mif_err("%s: ERR! %s_RXQ invalid (size:%d in:%d out:%d)\n",
ld->name, get_dev_name(dev), qsize, in, out);
#if 0
set_rx_head(dpld, dev, 0);
set_rx_tail(dpld, dev, 0);
#else
dpram_trigger_force_cp_crash(dpld);
#endif
return -EINVAL;
}
/* Allocate an rxb */
rxb = rxbq_get_free_rxb(&dpld->rxbq[dev]);
if (!rxb) {
mif_info("%s: ERR! %s rxbq_get_free_rxb fail\n",
ld->name, get_dev_name(dev));
return -ENOMEM;
}
/* Read data from each DPRAM buffer */
dpram_ipc_read(dpld, dev, rxb_put(rxb, rcvd), src, out, rcvd, qsize);
/* Calculate and set new out */
out += rcvd;
if (out >= qsize)
out -= qsize;
set_rx_tail(dpld, dev, out);
return rcvd;
}
static void dpram_ipc_write(struct dpram_link_device *dpld, int dev,
u32 qsize, u32 in, u32 out, struct sk_buff *skb)
{
struct link_device *ld = &dpld->ld;
u8 __iomem *buff = get_tx_buff(dpld, dev);
u8 *src = skb->data;
u32 len = skb->len;
u32 inp;
struct mif_irq_map map;
if (in < out) {
/* +++++++++ in ---------- out ++++++++++ */
memcpy((buff + in), src, len);
} else {
/* ------ out +++++++++++ in ------------ */
u32 space = qsize - in;
/* 1) in -> buffer end */
memcpy((buff + in), src, ((len > space) ? space : len));
/* 2) buffer start -> out */
if (len > space)
memcpy(buff, (src + space), (len - space));
}
/* update new in pointer */
inp = in + len;
if (inp >= qsize)
inp -= qsize;
set_tx_head(dpld, dev, inp);
if (dev == IPC_FMT) {
set_dpram_map(dpld, &map);
mif_irq_log(ld->mc->msd, map, "ipc_write", sizeof("ipc_write"));
mif_ipc_log(MIF_IPC_AP2CP, ld->mc->msd, skb->data, skb->len);
}
if (ld->aligned && memcmp16_to_io((buff + in), src, 4)) {
mif_err("%s: memcmp16_to_io fail\n", ld->name);
dpram_trigger_force_cp_crash(dpld);
}
}
/*
ret < 0 : error
ret == 0 : no data
ret > 0 : valid data
*/
static int dpram_ipc_recv_data_with_rxb(struct dpram_link_device *dpld, int dev)
{
struct link_device *ld = &dpld->ld;
struct dpram_rxb *rxb;
u8 __iomem *src = get_rx_buff(dpld, dev);
u32 qsize = get_rx_buff_size(dpld, dev);
u32 in;
u32 out;
u32 rcvd;
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"));
}
/* Allocate an rxb */
rxb = rxbq_get_free_rxb(&dpld->rxbq[dev]);
if (!rxb) {
mif_info("%s: ERR! %s rxbq_get_free_rxb fail\n",
ld->name, get_dev_name(dev));
return -ENOMEM;
}
/* Read data from each DPRAM buffer */
dpram_ipc_read(dpld, dev, rxb_put(rxb, rcvd), src, out, rcvd, qsize);
/* Calculate and set new out */
out += rcvd;
if (out >= qsize)
out -= qsize;
set_rx_tail(dpld, dev, out);
return rcvd;
}
/*
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;
}