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| author | Peter Ujfalusi <peter.ujfalusi@ti.com> | 2020-12-08 11:04:39 +0200 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2020-12-11 21:20:09 +0530 |
| commit | d2abc982333c02f9e1ff1c6b3782174f5b7662d7 (patch) | |
| tree | 17bcbe45e55c8d9b71d28745f3ca48bd48487adb /drivers/dma/ti/k3-udma-private.c | |
| parent | 8844898028d4127b0071ecb5a72e1894bd8b21d6 (diff) | |
| download | linux-d2abc982333c02f9e1ff1c6b3782174f5b7662d7.tar.bz2 | |
dmaengine: ti: k3-udma: Initial support for K3 PKTDMA
One of the DMAs introduced with AM64 is the Packet DMA (PKTDMA).
It serves similar purpose as K3 UDMAP channels in packet mode, but with
notable differences, like tflow support and channels being allocated to
service specific peripherals.
The rings for the PKTDMA is integrated within the DMA itself instead of
using rings from the general purpose ringacc.
PKTDMA can be used to service PSI-L peripherals, similarly to
K3 UDMA channels.
Most of the driver code can be reused for PKTDMA tchan/rchan support but
new setup and allocation functions are needed to handle the differences
between the DMAs.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20201208090440.31792-20-peter.ujfalusi@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma/ti/k3-udma-private.c')
| -rw-r--r-- | drivers/dma/ti/k3-udma-private.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/dma/ti/k3-udma-private.c b/drivers/dma/ti/k3-udma-private.c index 346a4dd9640a..5436b19d656e 100644 --- a/drivers/dma/ti/k3-udma-private.c +++ b/drivers/dma/ti/k3-udma-private.c @@ -88,6 +88,9 @@ EXPORT_SYMBOL(xudma_free_gp_rflow_range); bool xudma_rflow_is_gp(struct udma_dev *ud, int id) { + if (!ud->rflow_gp_map) + return false; + return !test_bit(id, ud->rflow_gp_map); } EXPORT_SYMBOL(xudma_rflow_is_gp); @@ -119,6 +122,12 @@ void xudma_rflow_put(struct udma_dev *ud, struct udma_rflow *p) } EXPORT_SYMBOL(xudma_rflow_put); +int xudma_get_rflow_ring_offset(struct udma_dev *ud) +{ + return ud->tflow_cnt; +} +EXPORT_SYMBOL(xudma_get_rflow_ring_offset); + #define XUDMA_GET_RESOURCE_ID(res) \ int xudma_##res##_get_id(struct udma_##res *p) \ { \ |