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A later patch uses the operation to invalidate stale CB when resetting a circular LL ring. No functional change. Reviewed-by: Frank Li Signed-off-by: Koichiro Den --- drivers/dma/dw-edma/dw-edma-core.h | 6 ++++++ drivers/dma/dw-edma/dw-edma-v0-core.c | 16 ++++++++++++++++ drivers/dma/dw-edma/dw-hdma-v0-core.c | 16 ++++++++++++++++ 3 files changed, 38 insertions(+) diff --git a/drivers/dma/dw-edma/dw-edma-core.h b/drivers/dma/dw-edma/dw-edma-core.h index e50fa7965778..089f913fd247 100644 --- a/drivers/dma/dw-edma/dw-edma-core.h +++ b/drivers/dma/dw-edma/dw-edma-core.h @@ -138,6 +138,7 @@ struct dw_edma_core_ops { void (*ll_data)(struct dw_edma_chan *chan, struct dw_edma_burst *burst, u32 idx, bool cb, bool irq); void (*ll_link)(struct dw_edma_chan *chan, u32 idx, bool cb, u64 addr); + void (*ll_clear)(struct dw_edma_chan *chan, u32 idx); int (*ll_cur_idx)(struct dw_edma_chan *chan); void (*ch_doorbell)(struct dw_edma_chan *chan); void (*ch_enable)(struct dw_edma_chan *chan); @@ -255,6 +256,11 @@ dw_edma_core_ll_link(struct dw_edma_chan *chan, u32 idx, bool cb, u64 addr) chan->dw->core->ll_link(chan, idx, cb, addr); } +static inline void dw_edma_core_ll_clear(struct dw_edma_chan *chan, u32 idx) +{ + chan->dw->core->ll_clear(chan, idx); +} + static inline void dw_edma_core_ch_doorbell(struct dw_edma_chan *chan) { chan->dw->core->ch_doorbell(chan); diff --git a/drivers/dma/dw-edma/dw-edma-v0-core.c b/drivers/dma/dw-edma/dw-edma-v0-core.c index cc8059182940..bb86d2f60ab5 100644 --- a/drivers/dma/dw-edma/dw-edma-v0-core.c +++ b/drivers/dma/dw-edma/dw-edma-v0-core.c @@ -605,6 +605,21 @@ dw_edma_v0_core_ll_link(struct dw_edma_chan *chan, u32 idx, bool cb, u64 addr) dw_edma_v0_write_ll_link(chan, idx, control, addr); } +static void dw_edma_v0_core_ll_clear(struct dw_edma_chan *chan, u32 idx) +{ + ptrdiff_t ofs = idx * sizeof(struct dw_edma_v0_lli); + + if (chan->dw->chip->flags & DW_EDMA_CHIP_LOCAL) { + struct dw_edma_v0_lli *lli = chan->ll_region.vaddr.mem + ofs; + + lli->control = 0; + } else { + struct dw_edma_v0_lli __iomem *lli = chan->ll_region.vaddr.io + ofs; + + writel(0, &lli->control); + } +} + static void dw_edma_v0_core_ch_doorbell(struct dw_edma_chan *chan) { struct dw_edma *dw = chan->dw; @@ -669,6 +684,7 @@ static const struct dw_edma_core_ops dw_edma_v0_core = { .handle_int = dw_edma_v0_core_handle_int, .ll_data = dw_edma_v0_core_ll_data, .ll_link = dw_edma_v0_core_ll_link, + .ll_clear = dw_edma_v0_core_ll_clear, .ll_cur_idx = dw_edma_v0_core_ll_cur_idx, .ch_doorbell = dw_edma_v0_core_ch_doorbell, .ch_enable = dw_edma_v0_core_ch_enable, diff --git a/drivers/dma/dw-edma/dw-hdma-v0-core.c b/drivers/dma/dw-edma/dw-hdma-v0-core.c index 19da1c8fd615..47d7a01658eb 100644 --- a/drivers/dma/dw-edma/dw-hdma-v0-core.c +++ b/drivers/dma/dw-edma/dw-hdma-v0-core.c @@ -374,6 +374,21 @@ dw_hdma_v0_core_ll_link(struct dw_edma_chan *chan, u32 idx, bool cb, u64 addr) dw_hdma_v0_write_ll_link(chan, idx, control, addr); } +static void dw_hdma_v0_core_ll_clear(struct dw_edma_chan *chan, u32 idx) +{ + ptrdiff_t ofs = idx * sizeof(struct dw_hdma_v0_lli); + + if (chan->dw->chip->flags & DW_EDMA_CHIP_LOCAL) { + struct dw_hdma_v0_lli *lli = chan->ll_region.vaddr.mem + ofs; + + lli->control = 0; + } else { + struct dw_hdma_v0_lli __iomem *lli = chan->ll_region.vaddr.io + ofs; + + writel(0, &lli->control); + } +} + static void dw_hdma_v0_core_ch_doorbell(struct dw_edma_chan *chan) { struct dw_edma *dw = chan->dw; @@ -425,6 +440,7 @@ static const struct dw_edma_core_ops dw_hdma_v0_core = { .non_ll_start = dw_hdma_v0_core_non_ll_start, .ll_data = dw_hdma_v0_core_ll_data, .ll_link = dw_hdma_v0_core_ll_link, + .ll_clear = dw_hdma_v0_core_ll_clear, .ll_cur_idx = dw_hdma_v0_core_ll_cur_idx, .ch_doorbell = dw_hdma_v0_core_ch_doorbell, .ch_enable = dw_hdma_v0_core_ch_enable, -- 2.51.0