diff options
| author | Vignesh Raghavendra <vigneshr@ti.com> | 2023-03-23 17:31:07 +0530 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2023-03-31 17:49:36 +0530 |
| commit | f806bea3093cb3568e01b4375d5e1d7c8c47c1d4 (patch) | |
| tree | a11fe3e3351ab450f429829e33c0205f2b0c146b /drivers/dma/ti | |
| parent | 86de3bbfe45e5a7e64d4f24a1c034725072420d8 (diff) | |
dmaengine: ti: k3-udma: Workaround errata i2234
Per [1], UDMA TR15 transactions may hang if ICNT0 is less than 64B
Work around is to set EOL flag is to 1 for ICNT0.
Since, there is no performance penalty / side effects of setting EOL
flag event ICNTO > 64B, just set the flag for all UDMAP TR15
descriptors.
[1] https://www.ti.com/lit/er/sprz455a/sprz455a.pdf
Errata doc for J721E DRA829/TDA4VM Processors Silicon Revision 1.1/1.0
(Rev. A)
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
[j-choudhary@ti.com: minor cleanups]
Signed-off-by: Jayesh Choudhary <j-choudhary@ti.com>
Link: https://lore.kernel.org/r/20230323120107.27638-1-j-choudhary@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma/ti')
| -rw-r--r-- | drivers/dma/ti/k3-udma.c | 20 |
1 files changed, 11 insertions, 9 deletions
diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c index f652a217be76..c07feaff69c0 100644 --- a/drivers/dma/ti/k3-udma.c +++ b/drivers/dma/ti/k3-udma.c @@ -2966,6 +2966,7 @@ udma_prep_slave_sg_triggered_tr(struct udma_chan *uc, struct scatterlist *sgl, struct scatterlist *sgent; struct cppi5_tr_type15_t *tr_req = NULL; enum dma_slave_buswidth dev_width; + u32 csf = CPPI5_TR_CSF_SUPR_EVT; u16 tr_cnt0, tr_cnt1; dma_addr_t dev_addr; struct udma_desc *d; @@ -3036,6 +3037,7 @@ udma_prep_slave_sg_triggered_tr(struct udma_chan *uc, struct scatterlist *sgl, if (uc->ud->match_data->type == DMA_TYPE_UDMA) { asel = 0; + csf |= CPPI5_TR_CSF_EOL_ICNT0; } else { asel = (u64)uc->config.asel << K3_ADDRESS_ASEL_SHIFT; dev_addr |= asel; @@ -3059,7 +3061,7 @@ udma_prep_slave_sg_triggered_tr(struct udma_chan *uc, struct scatterlist *sgl, cppi5_tr_init(&tr_req[tr_idx].flags, CPPI5_TR_TYPE15, false, true, CPPI5_TR_EVENT_SIZE_COMPLETION, 0); - cppi5_tr_csf_set(&tr_req[tr_idx].flags, CPPI5_TR_CSF_SUPR_EVT); + cppi5_tr_csf_set(&tr_req[tr_idx].flags, csf); cppi5_tr_set_trigger(&tr_req[tr_idx].flags, uc->config.tr_trigger_type, CPPI5_TR_TRIGGER_TYPE_ICNT2_DEC, 0, 0); @@ -3105,8 +3107,7 @@ udma_prep_slave_sg_triggered_tr(struct udma_chan *uc, struct scatterlist *sgl, cppi5_tr_init(&tr_req[tr_idx].flags, CPPI5_TR_TYPE15, false, true, CPPI5_TR_EVENT_SIZE_COMPLETION, 0); - cppi5_tr_csf_set(&tr_req[tr_idx].flags, - CPPI5_TR_CSF_SUPR_EVT); + cppi5_tr_csf_set(&tr_req[tr_idx].flags, csf); cppi5_tr_set_trigger(&tr_req[tr_idx].flags, uc->config.tr_trigger_type, CPPI5_TR_TRIGGER_TYPE_ICNT2_DEC, @@ -3150,8 +3151,7 @@ udma_prep_slave_sg_triggered_tr(struct udma_chan *uc, struct scatterlist *sgl, d->residue += sg_len; } - cppi5_tr_csf_set(&tr_req[tr_idx - 1].flags, - CPPI5_TR_CSF_SUPR_EVT | CPPI5_TR_CSF_EOP); + cppi5_tr_csf_set(&tr_req[tr_idx - 1].flags, csf | CPPI5_TR_CSF_EOP); return d; } @@ -3680,6 +3680,7 @@ udma_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src, int num_tr; size_t tr_size = sizeof(struct cppi5_tr_type15_t); u16 tr0_cnt0, tr0_cnt1, tr1_cnt0; + u32 csf = CPPI5_TR_CSF_SUPR_EVT; if (uc->config.dir != DMA_MEM_TO_MEM) { dev_err(chan->device->dev, @@ -3710,13 +3711,15 @@ udma_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src, if (uc->ud->match_data->type != DMA_TYPE_UDMA) { src |= (u64)uc->ud->asel << K3_ADDRESS_ASEL_SHIFT; dest |= (u64)uc->ud->asel << K3_ADDRESS_ASEL_SHIFT; + } else { + csf |= CPPI5_TR_CSF_EOL_ICNT0; } tr_req = d->hwdesc[0].tr_req_base; cppi5_tr_init(&tr_req[0].flags, CPPI5_TR_TYPE15, false, true, CPPI5_TR_EVENT_SIZE_COMPLETION, 0); - cppi5_tr_csf_set(&tr_req[0].flags, CPPI5_TR_CSF_SUPR_EVT); + cppi5_tr_csf_set(&tr_req[0].flags, csf); tr_req[0].addr = src; tr_req[0].icnt0 = tr0_cnt0; @@ -3735,7 +3738,7 @@ udma_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src, if (num_tr == 2) { cppi5_tr_init(&tr_req[1].flags, CPPI5_TR_TYPE15, false, true, CPPI5_TR_EVENT_SIZE_COMPLETION, 0); - cppi5_tr_csf_set(&tr_req[1].flags, CPPI5_TR_CSF_SUPR_EVT); + cppi5_tr_csf_set(&tr_req[1].flags, csf); tr_req[1].addr = src + tr0_cnt1 * tr0_cnt0; tr_req[1].icnt0 = tr1_cnt0; @@ -3750,8 +3753,7 @@ udma_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src, tr_req[1].dicnt3 = 1; } - cppi5_tr_csf_set(&tr_req[num_tr - 1].flags, - CPPI5_TR_CSF_SUPR_EVT | CPPI5_TR_CSF_EOP); + cppi5_tr_csf_set(&tr_req[num_tr - 1].flags, csf | CPPI5_TR_CSF_EOP); if (uc->config.metadata_size) d->vd.tx.metadata_ops = &metadata_ops; |