static void dpram_reset_rx_circ(struct dpram_link_device *dpld, int dev)
{
set_rx_head(dpld, dev, 0);
set_rx_tail(dpld, dev, 0);
if (dev == IPC_FMT)
trigger_force_cp_crash(dpld);
}
/*
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 int dpram_init_ipc(struct dpram_link_device *dpld)
{
struct link_device *ld = &dpld->ld;
int i;
if (ld->mode == LINK_MODE_IPC &&
get_magic(dpld) == DPRAM_MAGIC_CODE &&
get_access(dpld) == 1)
mif_info("%s: IPC already initialized\n", ld->name);
/* Clear pointers in every circular queue */
for (i = 0; i < dpld->max_ipc_dev; i++) {
set_tx_head(dpld, i, 0);
set_tx_tail(dpld, i, 0);
set_rx_head(dpld, i, 0);
set_rx_tail(dpld, i, 0);
}
/* Initialize variables for efficient TX/RX processing */
for (i = 0; i < dpld->max_ipc_dev; i++)
dpld->iod[i] = link_get_iod_with_format(ld, i);
dpld->iod[IPC_RAW] = link_get_iod_with_format(ld, IPC_MULTI_RAW);
if (dpld->iod[IPC_RAW]->recv_skb)
dpld->use_skb = true;
for (i = 0; i < dpld->max_ipc_dev; i++) {
spin_lock_init(&dpld->tx_lock[i]);
atomic_set(&dpld->res_required[i], 0);
skb_queue_purge(&dpld->skb_rxq[i]);
}
/* Enable IPC */
atomic_set(&dpld->accessing, 0);
set_magic(dpld, DPRAM_MAGIC_CODE);
set_access(dpld, 1);
if (get_magic(dpld) != DPRAM_MAGIC_CODE || get_access(dpld) != 1)
return -EACCES;
ld->mode = LINK_MODE_IPC;
if (wake_lock_active(&dpld->wlock))
wake_unlock(&dpld->wlock);
return 0;
}
static int dpram_init_ipc(struct dpram_link_device *dpld)
{
struct link_device *ld = &dpld->ld;
int i;
if (ld->mode == LINK_MODE_IPC &&
get_magic(dpld) == DPRAM_MAGIC_CODE &&
get_access(dpld) == 1)
mif_info("%s: IPC already initialized\n", ld->name);
/* Clear pointers in every circular queue */
for (i = 0; i < dpld->max_ipc_dev; i++) {
set_tx_head(dpld, i, 0);
set_tx_tail(dpld, i, 0);
set_rx_head(dpld, i, 0);
set_rx_tail(dpld, i, 0);
}
for (i = 0; i < dpld->max_ipc_dev; i++) {
spin_lock_init(&dpld->tx_lock[i]);
atomic_set(&dpld->res_required[i], 0);
}
atomic_set(&dpld->accessing, 0);
/* Enable IPC */
set_magic(dpld, DPRAM_MAGIC_CODE);
set_access(dpld, 1);
if (get_magic(dpld) != DPRAM_MAGIC_CODE || get_access(dpld) != 1)
return -EACCES;
ld->mode = LINK_MODE_IPC;
if (wake_lock_active(&dpld->wlock))
wake_unlock(&dpld->wlock);
return 0;
}
