/**
@brief check the free space in a SBD RB
@param rb the pointer to an SBD RB instance
@retval "> 0" the size of free space in the @b @@dev TXQ
@retval "< 0" an error code
*/
static inline int check_rb_space(struct sbd_ring_buffer *rb, unsigned int qlen,
unsigned int in, unsigned int out)
{
unsigned int space;
if (!circ_valid(qlen, in, out)) {
mif_err("ERR! TXQ[%d:%d] DIRTY (qlen:%d in:%d out:%d)\n",
rb->id, rb->ch, qlen, in, out);
return -EIO;
}
space = circ_get_space(qlen, in, out);
if (unlikely(space < 1)) {
mif_err_limited("TXQ[%d:%d] NOSPC (qlen:%d in:%d out:%d)\n",
rb->id, rb->ch, qlen, in, out);
return -ENOSPC;
}
return space;
}
/**
@brief check the free space in a circular TXQ
@param mld the pointer to a mem_link_device instance
@param dev the pointer to a mem_ipc_device instance
@param qsize the size of the buffer in @b @@dev TXQ
@param in the IN (HEAD) pointer value of the TXQ
@param out the OUT (TAIL) pointer value of the TXQ
@param count the size of the data to be transmitted
@retval "> 0" the size of free space in the @b @@dev TXQ
@retval "< 0" an error code
*/
static inline int check_txq_space(struct mem_link_device *mld,
struct mem_ipc_device *dev,
unsigned int qsize, unsigned int in,
unsigned int out, unsigned int count)
{
struct link_device *ld = &mld->link_dev;
struct modem_ctl *mc = ld->mc;
unsigned int usage;
unsigned int space;
if (!circ_valid(qsize, in, out)) {
mif_err("%s: ERR! Invalid %s_TXQ{qsize:%d in:%d out:%d}\n",
ld->name, dev->name, qsize, in, out);
return -EIO;
}
usage = circ_get_usage(qsize, in, out);
if (unlikely(usage > SHM_UL_USAGE_LIMIT) && cp_online(mc)) {
#ifdef DEBUG_MODEM_IF
mif_debug("%s: CAUTION! BUSY in %s_TXQ{qsize:%d in:%d out:%d "\
"usage:%d (count:%d)}\n", ld->name, dev->name, qsize,
in, out, usage, count);
#endif
return -EBUSY;
}
space = circ_get_space(qsize, in, out);
if (unlikely(space < count)) {
#ifdef DEBUG_MODEM_IF
if (cp_online(mc)) {
mif_err("%s: CAUTION! NOSPC in %s_TXQ{qsize:%d in:%d "\
"out:%d space:%d count:%d}\n", ld->name,
dev->name, qsize, in, out, space, count);
}
#endif
return -ENOSPC;
}
return space;
}
static inline int check_udl_space(struct mem_link_device *mld,
struct mem_ipc_device *dev,
unsigned int qsize, unsigned int in,
unsigned int out, unsigned int count)
{
struct link_device *ld = &mld->link_dev;
unsigned int space;
if (!circ_valid(qsize, in, out)) {
mif_err("%s: ERR! Invalid %s_TXQ{qsize:%d in:%d out:%d}\n",
ld->name, dev->name, qsize, in, out);
return -EIO;
}
space = circ_get_space(qsize, in, out);
if (unlikely(space < count)) {
mif_err("%s: NOSPC in %s_TXQ{qsize:%d in:%d "
"out:%d space:%d count:%d}\n", ld->name,
dev->name, qsize, in, out, space, count);
return -ENOSPC;
}
return 0;
}
