From 8ca46eabb492c2b9adf687653757f0decb50c4f4 Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Fri, 18 Oct 2013 19:35:23 +0200 Subject: [PATCH] dmaengine: prepare for generic 'unmap' data Add a hook for a common dma unmap implementation to enable removal of the per driver custom unmap code. (A reworked version of Bartlomiej Zolnierkiewicz's patches to remove the custom callbacks and the size increase of dma_async_tx_descriptor for drivers that don't care about raid). Cc: Vinod Koul Cc: Tomasz Figa Cc: Dave Jiang [bzolnier: prepare pl330 driver for adding missing unmap while at it] Signed-off-by: Bartlomiej Zolnierkiewicz Signed-off-by: Kyungmin Park Signed-off-by: Dan Williams --- drivers/dma/amba-pl08x.c | 1 + drivers/dma/at_hdmac.c | 1 + drivers/dma/dw/core.c | 1 + drivers/dma/ep93xx_dma.c | 1 + drivers/dma/fsldma.c | 1 + drivers/dma/ioat/dma.c | 1 + drivers/dma/ioat/dma_v2.c | 1 + drivers/dma/ioat/dma_v3.c | 1 + drivers/dma/iop-adma.c | 1 + drivers/dma/mv_xor.c | 1 + drivers/dma/pl330.c | 2 ++ drivers/dma/ppc4xx/adma.c | 1 + drivers/dma/timb_dma.c | 1 + drivers/dma/txx9dmac.c | 1 + include/linux/dmaengine.h | 26 ++++++++++++++++++++++++++ 15 files changed, 41 insertions(+) diff --git a/drivers/dma/amba-pl08x.c b/drivers/dma/amba-pl08x.c index fce46c5bf1c74..7f9846464b773 100644 --- a/drivers/dma/amba-pl08x.c +++ b/drivers/dma/amba-pl08x.c @@ -1197,6 +1197,7 @@ static void pl08x_desc_free(struct virt_dma_desc *vd) struct pl08x_txd *txd = to_pl08x_txd(&vd->tx); struct pl08x_dma_chan *plchan = to_pl08x_chan(vd->tx.chan); + dma_descriptor_unmap(txd); if (!plchan->slave) pl08x_unmap_buffers(txd); diff --git a/drivers/dma/at_hdmac.c b/drivers/dma/at_hdmac.c index c787f38a186a0..cc7098ddf9d4d 100644 --- a/drivers/dma/at_hdmac.c +++ b/drivers/dma/at_hdmac.c @@ -345,6 +345,7 @@ atc_chain_complete(struct at_dma_chan *atchan, struct at_desc *desc) list_move(&desc->desc_node, &atchan->free_list); /* unmap dma addresses (not on slave channels) */ + dma_descriptor_unmap(txd); if (!atchan->chan_common.private) { struct device *parent = chan2parent(&atchan->chan_common); if (!(txd->flags & DMA_COMPL_SKIP_DEST_UNMAP)) { diff --git a/drivers/dma/dw/core.c b/drivers/dma/dw/core.c index 89eb89f222846..e3fe1b1a73b13 100644 --- a/drivers/dma/dw/core.c +++ b/drivers/dma/dw/core.c @@ -311,6 +311,7 @@ dwc_descriptor_complete(struct dw_dma_chan *dwc, struct dw_desc *desc, list_splice_init(&desc->tx_list, &dwc->free_list); list_move(&desc->desc_node, &dwc->free_list); + dma_descriptor_unmap(txd); if (!is_slave_direction(dwc->direction)) { struct device *parent = chan2parent(&dwc->chan); if (!(txd->flags & DMA_COMPL_SKIP_DEST_UNMAP)) { diff --git a/drivers/dma/ep93xx_dma.c b/drivers/dma/ep93xx_dma.c index 591cd8c63abbc..dcd6bf5d3091e 100644 --- a/drivers/dma/ep93xx_dma.c +++ b/drivers/dma/ep93xx_dma.c @@ -791,6 +791,7 @@ static void ep93xx_dma_tasklet(unsigned long data) * For the memcpy channels the API requires us to unmap the * buffers unless requested otherwise. */ + dma_descriptor_unmap(&desc->txd); if (!edmac->chan.private) ep93xx_dma_unmap_buffers(desc); diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c index b3f3e90054f2a..66c4052a1f345 100644 --- a/drivers/dma/fsldma.c +++ b/drivers/dma/fsldma.c @@ -868,6 +868,7 @@ static void fsldma_cleanup_descriptor(struct fsldma_chan *chan, /* Run any dependencies */ dma_run_dependencies(txd); + dma_descriptor_unmap(txd); /* Unmap the dst buffer, if requested */ if (!(txd->flags & DMA_COMPL_SKIP_DEST_UNMAP)) { if (txd->flags & DMA_COMPL_DEST_UNMAP_SINGLE) diff --git a/drivers/dma/ioat/dma.c b/drivers/dma/ioat/dma.c index 5ff6fc1819dc6..26f8cfd6bc3f0 100644 --- a/drivers/dma/ioat/dma.c +++ b/drivers/dma/ioat/dma.c @@ -602,6 +602,7 @@ static void __cleanup(struct ioat_dma_chan *ioat, dma_addr_t phys_complete) dump_desc_dbg(ioat, desc); if (tx->cookie) { dma_cookie_complete(tx); + dma_descriptor_unmap(tx); ioat_dma_unmap(chan, tx->flags, desc->len, desc->hw); ioat->active -= desc->hw->tx_cnt; if (tx->callback) { diff --git a/drivers/dma/ioat/dma_v2.c b/drivers/dma/ioat/dma_v2.c index b925e1b1d139b..fc7b50a813cca 100644 --- a/drivers/dma/ioat/dma_v2.c +++ b/drivers/dma/ioat/dma_v2.c @@ -148,6 +148,7 @@ static void __cleanup(struct ioat2_dma_chan *ioat, dma_addr_t phys_complete) tx = &desc->txd; dump_desc_dbg(ioat, desc); if (tx->cookie) { + dma_descriptor_unmap(tx); ioat_dma_unmap(chan, tx->flags, desc->len, desc->hw); dma_cookie_complete(tx); if (tx->callback) { diff --git a/drivers/dma/ioat/dma_v3.c b/drivers/dma/ioat/dma_v3.c index d8ececaf1b570..57a2901b917ab 100644 --- a/drivers/dma/ioat/dma_v3.c +++ b/drivers/dma/ioat/dma_v3.c @@ -577,6 +577,7 @@ static void __cleanup(struct ioat2_dma_chan *ioat, dma_addr_t phys_complete) tx = &desc->txd; if (tx->cookie) { dma_cookie_complete(tx); + dma_descriptor_unmap(tx); ioat3_dma_unmap(ioat, desc, idx + i); if (tx->callback) { tx->callback(tx->callback_param); diff --git a/drivers/dma/iop-adma.c b/drivers/dma/iop-adma.c index dd8b44a56e5d0..8f6e426590eb7 100644 --- a/drivers/dma/iop-adma.c +++ b/drivers/dma/iop-adma.c @@ -152,6 +152,7 @@ iop_adma_run_tx_complete_actions(struct iop_adma_desc_slot *desc, if (tx->callback) tx->callback(tx->callback_param); + dma_descriptor_unmap(tx); /* unmap dma addresses * (unmap_single vs unmap_page?) */ diff --git a/drivers/dma/mv_xor.c b/drivers/dma/mv_xor.c index 536dcb8ba5fdf..ed1ab1d0875ed 100644 --- a/drivers/dma/mv_xor.c +++ b/drivers/dma/mv_xor.c @@ -278,6 +278,7 @@ mv_xor_run_tx_complete_actions(struct mv_xor_desc_slot *desc, desc->async_tx.callback( desc->async_tx.callback_param); + dma_descriptor_unmap(&desc->async_tx); /* unmap dma addresses * (unmap_single vs unmap_page?) */ diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c index a562d24d20bf5..ab25e52cd43b8 100644 --- a/drivers/dma/pl330.c +++ b/drivers/dma/pl330.c @@ -2268,6 +2268,8 @@ static void pl330_tasklet(unsigned long data) list_move_tail(&desc->node, &pch->dmac->desc_pool); } + dma_descriptor_unmap(&desc->txd); + if (callback) { spin_unlock_irqrestore(&pch->lock, flags); callback(callback_param); diff --git a/drivers/dma/ppc4xx/adma.c b/drivers/dma/ppc4xx/adma.c index 370ff8265630c..442492da74159 100644 --- a/drivers/dma/ppc4xx/adma.c +++ b/drivers/dma/ppc4xx/adma.c @@ -1765,6 +1765,7 @@ static dma_cookie_t ppc440spe_adma_run_tx_complete_actions( desc->async_tx.callback( desc->async_tx.callback_param); + dma_descriptor_unmap(&desc->async_tx); /* unmap dma addresses * (unmap_single vs unmap_page?) * diff --git a/drivers/dma/timb_dma.c b/drivers/dma/timb_dma.c index 28af214fce049..1d0c98839087b 100644 --- a/drivers/dma/timb_dma.c +++ b/drivers/dma/timb_dma.c @@ -293,6 +293,7 @@ static void __td_finish(struct timb_dma_chan *td_chan) list_move(&td_desc->desc_node, &td_chan->free_list); + dma_descriptor_unmap(txd); if (!(txd->flags & DMA_COMPL_SKIP_SRC_UNMAP)) __td_unmap_descs(td_desc, txd->flags & DMA_COMPL_SRC_UNMAP_SINGLE); diff --git a/drivers/dma/txx9dmac.c b/drivers/dma/txx9dmac.c index 71e8e775189e0..22a0b6c78c774 100644 --- a/drivers/dma/txx9dmac.c +++ b/drivers/dma/txx9dmac.c @@ -419,6 +419,7 @@ txx9dmac_descriptor_complete(struct txx9dmac_chan *dc, list_splice_init(&desc->tx_list, &dc->free_list); list_move(&desc->desc_node, &dc->free_list); + dma_descriptor_unmap(txd); if (!ds) { dma_addr_t dmaaddr; if (!(txd->flags & DMA_COMPL_SKIP_DEST_UNMAP)) { diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h index 0bc727534108d..9070050fbcd86 100644 --- a/include/linux/dmaengine.h +++ b/include/linux/dmaengine.h @@ -413,6 +413,17 @@ void dma_chan_cleanup(struct kref *kref); typedef bool (*dma_filter_fn)(struct dma_chan *chan, void *filter_param); typedef void (*dma_async_tx_callback)(void *dma_async_param); + +struct dmaengine_unmap_data { + u8 to_cnt; + u8 from_cnt; + u8 bidi_cnt; + struct device *dev; + struct kref kref; + size_t len; + dma_addr_t addr[0]; +}; + /** * struct dma_async_tx_descriptor - async transaction descriptor * ---dma generic offload fields--- @@ -438,6 +449,7 @@ struct dma_async_tx_descriptor { dma_cookie_t (*tx_submit)(struct dma_async_tx_descriptor *tx); dma_async_tx_callback callback; void *callback_param; + struct dmaengine_unmap_data *unmap; #ifdef CONFIG_ASYNC_TX_ENABLE_CHANNEL_SWITCH struct dma_async_tx_descriptor *next; struct dma_async_tx_descriptor *parent; @@ -445,6 +457,20 @@ struct dma_async_tx_descriptor { #endif }; +static inline void dma_set_unmap(struct dma_async_tx_descriptor *tx, + struct dmaengine_unmap_data *unmap) +{ + kref_get(&unmap->kref); + tx->unmap = unmap; +} + +static inline void dma_descriptor_unmap(struct dma_async_tx_descriptor *tx) +{ + if (tx->unmap) { + tx->unmap = NULL; + } +} + #ifndef CONFIG_ASYNC_TX_ENABLE_CHANNEL_SWITCH static inline void txd_lock(struct dma_async_tx_descriptor *txd) { -- 2.39.5