diff options
| author | Peter Ujfalusi <peter.ujfalusi@ti.com> | 2020-12-08 12:04:39 +0300 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2020-12-11 18:50:09 +0300 |
| commit | d2abc982333c02f9e1ff1c6b3782174f5b7662d7 (patch) | |
| tree | 17bcbe45e55c8d9b71d28745f3ca48bd48487adb /drivers/dma/ti/k3-udma.h | |
| parent | 8844898028d4127b0071ecb5a72e1894bd8b21d6 (diff) | |
| download | linux-d2abc982333c02f9e1ff1c6b3782174f5b7662d7.tar.xz | |
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.h')
| -rw-r--r-- | drivers/dma/ti/k3-udma.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/dma/ti/k3-udma.h b/drivers/dma/ti/k3-udma.h index 3ec38b383b76..ccb19f286daf 100644 --- a/drivers/dma/ti/k3-udma.h +++ b/drivers/dma/ti/k3-udma.h @@ -55,6 +55,8 @@ #define BCDMA_CAP4_HTCHAN_CNT(val) (((val) >> 16) & 0xff) #define BCDMA_CAP4_UTCHAN_CNT(val) (((val) >> 24) & 0xff) +#define PKTDMA_CAP4_TFLOW_CNT(val) ((val) & 0x3fff) + /* UDMA_CHAN_RT_CTL_REG */ #define UDMA_CHAN_RT_CTL_EN BIT(31) #define UDMA_CHAN_RT_CTL_TDOWN BIT(30) @@ -105,6 +107,7 @@ enum udma_rm_range { RM_RANGE_TCHAN, RM_RANGE_RCHAN, RM_RANGE_RFLOW, + RM_RANGE_TFLOW, RM_RANGE_LAST, }; @@ -152,5 +155,6 @@ void xudma_tchanrt_write(struct udma_tchan *tchan, int reg, u32 val); u32 xudma_rchanrt_read(struct udma_rchan *rchan, int reg); void xudma_rchanrt_write(struct udma_rchan *rchan, int reg, u32 val); bool xudma_rflow_is_gp(struct udma_dev *ud, int id); +int xudma_get_rflow_ring_offset(struct udma_dev *ud); #endif /* K3_UDMA_H_ */ |