diff options
author | Grygorii Strashko <grygorii.strashko@ti.com> | 2020-10-30 23:30:00 +0300 |
---|---|---|
committer | Vinod Koul <vkoul@kernel.org> | 2020-11-09 14:54:01 +0300 |
commit | 69973b4895b35a67409c8ce1c3d62090470ef47b (patch) | |
tree | eddfb3397db42afce8d59ae15efd0035a93d384c /drivers/dma/ti/k3-udma-glue.c | |
parent | 6349753276a657b423460b93c2f511c73bb0a118 (diff) | |
download | linux-69973b4895b35a67409c8ce1c3d62090470ef47b.tar.xz |
dmaengine: ti: k3-udma-glue: move psi-l pairing in channel en/dis functions
The NAVSS UDMA will stuck if target IP module is disabled by PM while PSI-L
threads are paired UDMA<->IP and no further transfers is possible. This
could be the case for IPs J721E Main CPSW (cpsw9g).
Hence, to avoid such situation do PSI-L threads pairing only when UDMA
channel is going to be enabled as at this time DMA consumer module expected
to be active already.
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20201030203000.4281-1-grygorii.strashko@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma/ti/k3-udma-glue.c')
-rw-r--r-- | drivers/dma/ti/k3-udma-glue.c | 64 |
1 files changed, 38 insertions, 26 deletions
diff --git a/drivers/dma/ti/k3-udma-glue.c b/drivers/dma/ti/k3-udma-glue.c index a367584f0d7b..dfb65e382ab9 100644 --- a/drivers/dma/ti/k3-udma-glue.c +++ b/drivers/dma/ti/k3-udma-glue.c @@ -303,19 +303,6 @@ struct k3_udma_glue_tx_channel *k3_udma_glue_request_tx_chn(struct device *dev, goto err; } - ret = xudma_navss_psil_pair(tx_chn->common.udmax, - tx_chn->common.src_thread, - tx_chn->common.dst_thread); - if (ret) { - dev_err(dev, "PSI-L request err %d\n", ret); - goto err; - } - - tx_chn->psil_paired = true; - - /* reset TX RT registers */ - k3_udma_glue_disable_tx_chn(tx_chn); - k3_udma_glue_dump_tx_chn(tx_chn); return tx_chn; @@ -378,6 +365,18 @@ EXPORT_SYMBOL_GPL(k3_udma_glue_pop_tx_chn); int k3_udma_glue_enable_tx_chn(struct k3_udma_glue_tx_channel *tx_chn) { + int ret; + + ret = xudma_navss_psil_pair(tx_chn->common.udmax, + tx_chn->common.src_thread, + tx_chn->common.dst_thread); + if (ret) { + dev_err(tx_chn->common.dev, "PSI-L request err %d\n", ret); + return ret; + } + + tx_chn->psil_paired = true; + xudma_tchanrt_write(tx_chn->udma_tchanx, UDMA_CHAN_RT_PEER_RT_EN_REG, UDMA_PEER_RT_EN_ENABLE); @@ -398,6 +397,13 @@ void k3_udma_glue_disable_tx_chn(struct k3_udma_glue_tx_channel *tx_chn) xudma_tchanrt_write(tx_chn->udma_tchanx, UDMA_CHAN_RT_PEER_RT_EN_REG, 0); k3_udma_glue_dump_tx_rt_chn(tx_chn, "txchn dis2"); + + if (tx_chn->psil_paired) { + xudma_navss_psil_unpair(tx_chn->common.udmax, + tx_chn->common.src_thread, + tx_chn->common.dst_thread); + tx_chn->psil_paired = false; + } } EXPORT_SYMBOL_GPL(k3_udma_glue_disable_tx_chn); @@ -815,19 +821,6 @@ k3_udma_glue_request_rx_chn_priv(struct device *dev, const char *name, goto err; } - ret = xudma_navss_psil_pair(rx_chn->common.udmax, - rx_chn->common.src_thread, - rx_chn->common.dst_thread); - if (ret) { - dev_err(dev, "PSI-L request err %d\n", ret); - goto err; - } - - rx_chn->psil_paired = true; - - /* reset RX RT registers */ - k3_udma_glue_disable_rx_chn(rx_chn); - k3_udma_glue_dump_rx_chn(rx_chn); return rx_chn; @@ -1052,12 +1045,24 @@ EXPORT_SYMBOL_GPL(k3_udma_glue_rx_flow_disable); int k3_udma_glue_enable_rx_chn(struct k3_udma_glue_rx_channel *rx_chn) { + int ret; + if (rx_chn->remote) return -EINVAL; if (rx_chn->flows_ready < rx_chn->flow_num) return -EINVAL; + ret = xudma_navss_psil_pair(rx_chn->common.udmax, + rx_chn->common.src_thread, + rx_chn->common.dst_thread); + if (ret) { + dev_err(rx_chn->common.dev, "PSI-L request err %d\n", ret); + return ret; + } + + rx_chn->psil_paired = true; + xudma_rchanrt_write(rx_chn->udma_rchanx, UDMA_CHAN_RT_CTL_REG, UDMA_CHAN_RT_CTL_EN); @@ -1078,6 +1083,13 @@ void k3_udma_glue_disable_rx_chn(struct k3_udma_glue_rx_channel *rx_chn) xudma_rchanrt_write(rx_chn->udma_rchanx, UDMA_CHAN_RT_CTL_REG, 0); k3_udma_glue_dump_rx_rt_chn(rx_chn, "rxrt dis2"); + + if (rx_chn->psil_paired) { + xudma_navss_psil_unpair(rx_chn->common.udmax, + rx_chn->common.src_thread, + rx_chn->common.dst_thread); + rx_chn->psil_paired = false; + } } EXPORT_SYMBOL_GPL(k3_udma_glue_disable_rx_chn); |