From 9aa48806edb8c37e82532dbc6098b03f6bd4245e Mon Sep 17 00:00:00 2001 From: Samuel Holland Date: Sun, 24 Apr 2022 12:27:56 -0500 Subject: [PATCH] dmaengine: sun6i: Do not use virt_to_phys This breaks on RISC-V, because dma_pool_alloc returns addresses which are not in the linear map. Instead, plumb through the physical address which is already known anyway. Acked-by: Maxime Ripard Signed-off-by: Samuel Holland Link: https://lore.kernel.org/r/20220424172759.33383-3-samuel@sholland.org Signed-off-by: Vinod Koul --- drivers/dma/sun6i-dma.c | 38 +++++++++++++++++++------------------- 1 file changed, 19 insertions(+), 19 deletions(-) diff --git a/drivers/dma/sun6i-dma.c b/drivers/dma/sun6i-dma.c index 5cadd4d2b824..4436fbd70445 100644 --- a/drivers/dma/sun6i-dma.c +++ b/drivers/dma/sun6i-dma.c @@ -241,9 +241,7 @@ static inline void sun6i_dma_dump_com_regs(struct sun6i_dma_dev *sdev) static inline void sun6i_dma_dump_chan_regs(struct sun6i_dma_dev *sdev, struct sun6i_pchan *pchan) { - phys_addr_t reg = virt_to_phys(pchan->base); - - dev_dbg(sdev->slave.dev, "Chan %d reg: %pa\n" + dev_dbg(sdev->slave.dev, "Chan %d reg:\n" "\t___en(%04x): \t0x%08x\n" "\tpause(%04x): \t0x%08x\n" "\tstart(%04x): \t0x%08x\n" @@ -252,7 +250,7 @@ static inline void sun6i_dma_dump_chan_regs(struct sun6i_dma_dev *sdev, "\t__dst(%04x): \t0x%08x\n" "\tcount(%04x): \t0x%08x\n" "\t_para(%04x): \t0x%08x\n\n", - pchan->idx, ®, + pchan->idx, DMA_CHAN_ENABLE, readl(pchan->base + DMA_CHAN_ENABLE), DMA_CHAN_PAUSE, @@ -385,17 +383,16 @@ static void *sun6i_dma_lli_add(struct sun6i_dma_lli *prev, } static inline void sun6i_dma_dump_lli(struct sun6i_vchan *vchan, - struct sun6i_dma_lli *lli) + struct sun6i_dma_lli *v_lli, + dma_addr_t p_lli) { - phys_addr_t p_lli = virt_to_phys(lli); - dev_dbg(chan2dev(&vchan->vc.chan), - "\n\tdesc: p - %pa v - 0x%p\n" + "\n\tdesc:\tp - %pad v - 0x%p\n" "\t\tc - 0x%08x s - 0x%08x d - 0x%08x\n" "\t\tl - 0x%08x p - 0x%08x n - 0x%08x\n", - &p_lli, lli, - lli->cfg, lli->src, lli->dst, - lli->len, lli->para, lli->p_lli_next); + &p_lli, v_lli, + v_lli->cfg, v_lli->src, v_lli->dst, + v_lli->len, v_lli->para, v_lli->p_lli_next); } static void sun6i_dma_free_desc(struct virt_dma_desc *vd) @@ -445,7 +442,7 @@ static int sun6i_dma_start_desc(struct sun6i_vchan *vchan) pchan->desc = to_sun6i_desc(&desc->tx); pchan->done = NULL; - sun6i_dma_dump_lli(vchan, pchan->desc->v_lli); + sun6i_dma_dump_lli(vchan, pchan->desc->v_lli, pchan->desc->p_lli); irq_reg = pchan->idx / DMA_IRQ_CHAN_NR; irq_offset = pchan->idx % DMA_IRQ_CHAN_NR; @@ -670,7 +667,7 @@ static struct dma_async_tx_descriptor *sun6i_dma_prep_dma_memcpy( sun6i_dma_lli_add(NULL, v_lli, p_lli, txd); - sun6i_dma_dump_lli(vchan, v_lli); + sun6i_dma_dump_lli(vchan, v_lli, p_lli); return vchan_tx_prep(&vchan->vc, &txd->vd, flags); @@ -746,14 +743,16 @@ static struct dma_async_tx_descriptor *sun6i_dma_prep_slave_sg( } dev_dbg(chan2dev(chan), "First: %pad\n", &txd->p_lli); - for (prev = txd->v_lli; prev; prev = prev->v_lli_next) - sun6i_dma_dump_lli(vchan, prev); + for (p_lli = txd->p_lli, v_lli = txd->v_lli; v_lli; + p_lli = v_lli->p_lli_next, v_lli = v_lli->v_lli_next) + sun6i_dma_dump_lli(vchan, v_lli, p_lli); return vchan_tx_prep(&vchan->vc, &txd->vd, flags); err_lli_free: - for (prev = txd->v_lli; prev; prev = prev->v_lli_next) - dma_pool_free(sdev->pool, prev, virt_to_phys(prev)); + for (p_lli = txd->p_lli, v_lli = txd->v_lli; v_lli; + p_lli = v_lli->p_lli_next, v_lli = v_lli->v_lli_next) + dma_pool_free(sdev->pool, v_lli, p_lli); kfree(txd); return NULL; } @@ -820,8 +819,9 @@ static struct dma_async_tx_descriptor *sun6i_dma_prep_dma_cyclic( return vchan_tx_prep(&vchan->vc, &txd->vd, flags); err_lli_free: - for (prev = txd->v_lli; prev; prev = prev->v_lli_next) - dma_pool_free(sdev->pool, prev, virt_to_phys(prev)); + for (p_lli = txd->p_lli, v_lli = txd->v_lli; v_lli; + p_lli = v_lli->p_lli_next, v_lli = v_lli->v_lli_next) + dma_pool_free(sdev->pool, v_lli, p_lli); kfree(txd); return NULL; }