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soc: ti: k3-ringacc: add request pair of rings api. 

Add new API k3_ringacc_request_rings_pair() to request pair of rings at
once, as in the most cases Rings are used with DMA channels, which need to
request pair of rings - one to feed DMA with descriptors (TX/RX FDQ) and
one to receive completions (RX/TX CQ). This will allow to simplify Ringacc
API users.

Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Reviewed-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
This commit is contained in:
Grygorii Strashko 2020-07-24 14:19:12 -07:00 committed by Santosh Shilimkar
parent 175e663f70
commit 43148b1cab
2 changed files with 28 additions and 0 deletions
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24
drivers/soc/ti/k3-ringacc.c
View File

@ -322,6 +322,30 @@ struct k3_ring *k3_ringacc_request_ring(struct k3_ringacc *ringacc,
}
EXPORT_SYMBOL_GPL(k3_ringacc_request_ring);
int k3_ringacc_request_rings_pair(struct k3_ringacc *ringacc,
int fwd_id, int compl_id,
struct k3_ring **fwd_ring,
struct k3_ring **compl_ring)
{
int ret = 0;
if (!fwd_ring || !compl_ring)
return -EINVAL;
*fwd_ring = k3_ringacc_request_ring(ringacc, fwd_id, 0);
if (!(*fwd_ring))
return -ENODEV;
*compl_ring = k3_ringacc_request_ring(ringacc, compl_id, 0);
if (!(*compl_ring)) {
k3_ringacc_ring_free(*fwd_ring);
ret = -ENODEV;
}
return ret;
}
EXPORT_SYMBOL_GPL(k3_ringacc_request_rings_pair);
static void k3_ringacc_ring_reset_sci(struct k3_ring *ring)
{
struct k3_ringacc *ringacc = ring->parent;

4
include/linux/soc/ti/k3-ringacc.h
View File

@ -107,6 +107,10 @@ struct k3_ringacc *of_k3_ringacc_get_by_phandle(struct device_node *np,
struct k3_ring *k3_ringacc_request_ring(struct k3_ringacc *ringacc,
int id, u32 flags);
int k3_ringacc_request_rings_pair(struct k3_ringacc *ringacc,
int fwd_id, int compl_id,
struct k3_ring **fwd_ring,
struct k3_ring **compl_ring);
/**
* k3_ringacc_ring_reset - ring reset
* @ring: pointer on Ring