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 <maxime@cerno.tech>
Signed-off-by: Samuel Holland <samuel@sholland.org>
Link: https://lore.kernel.org/r/20220424172759.33383-3-samuel@sholland.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/drivers/dma/sun6i-dma.c b/drivers/dma/sun6i-dma.c
index 5cadd4d..4436fbd 100644 (file)
--- 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, &reg,
+               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;
 }