diff options
| -rw-r--r-- | drivers/dma/ti/k3-udma.c | 28 | ||||
| -rw-r--r-- | include/linux/soc/ti/ti-udma.h | 19 |
2 files changed, 47 insertions, 0 deletions
diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c index 2e64d33..f90ca53 100644 --- a/drivers/dma/ti/k3-udma.c +++ b/drivers/dma/ti/k3-udma.c @@ -104,6 +104,8 @@ struct udma_chan { struct udma_rchan *rchan; struct udma_rflow *rflow; + struct ti_udma_drv_chan_cfg_data cfg_data; + u32 bcnt; /* number of bytes completed since the start of the channel */ bool pkt_mode; /* TR or packet */ @@ -1407,6 +1409,11 @@ static int udma_request(struct dma *dma) uc->desc_rx_cur = 0; uc->num_rx_bufs = 0; + if (uc->dir == DMA_DEV_TO_MEM) { + uc->cfg_data.flow_id_base = uc->rflow->id; + uc->cfg_data.flow_id_cnt = 1; + } + return 0; } @@ -1689,6 +1696,26 @@ int udma_prepare_rcv_buf(struct dma *dma, void *dst, size_t size) return 0; } +static int udma_get_cfg(struct dma *dma, u32 id, void **data) +{ + struct udma_dev *ud = dev_get_priv(dma->dev); + struct udma_chan *uc; + + if (dma->id >= (ud->rchan_cnt + ud->tchan_cnt)) { + dev_err(dma->dev, "invalid dma ch_id %lu\n", dma->id); + return -EINVAL; + } + + switch (id) { + case TI_UDMA_CHAN_PRIV_INFO: + uc = &ud->channels[dma->id]; + *data = &uc->cfg_data; + return 0; + } + + return -EINVAL; +} + static const struct dma_ops udma_ops = { .transfer = udma_transfer, .of_xlate = udma_of_xlate, @@ -1699,6 +1726,7 @@ static const struct dma_ops udma_ops = { .send = udma_send, .receive = udma_receive, .prepare_rcv_buf = udma_prepare_rcv_buf, + .get_cfg = udma_get_cfg, }; static const struct udevice_id udma_ids[] = { diff --git a/include/linux/soc/ti/ti-udma.h b/include/linux/soc/ti/ti-udma.h index e9d4226..04e354f 100644 --- a/include/linux/soc/ti/ti-udma.h +++ b/include/linux/soc/ti/ti-udma.h @@ -21,4 +21,23 @@ struct ti_udma_drv_packet_data { u32 dest_tag; }; +/** + * struct ti_udma_drv_chan_cfg_data - TI UDMA per channel specific + * configuration data + * + * @flow_id_base: Start index of flow ID allocated to this channel + * @flow_id_cnt: Number of flows allocated for this channel starting at + * flow_id_base + * + * TI UDMA channel specific data returned as part of dma_get_cfg() call + * from the DMA client driver. + */ +struct ti_udma_drv_chan_cfg_data { + u32 flow_id_base; + u32 flow_id_cnt; +}; + +/* TI UDMA specific flag IDs for dma_get_cfg() call */ +#define TI_UDMA_CHAN_PRIV_INFO 0 + #endif /* __TI_UDMA_H */ |