diff options
| -rw-r--r-- | drivers/dma/sh/shdma-base.c | 9 | ||||
| -rw-r--r-- | drivers/dma/sh/shdma.c | 24 | ||||
| -rw-r--r-- | drivers/dma/sh/shdma.h | 2 | ||||
| -rw-r--r-- | include/linux/sh_dma.h | 2 | ||||
| -rw-r--r-- | include/linux/shdma-base.h | 1 |
5 files changed, 18 insertions, 20 deletions
diff --git a/drivers/dma/sh/shdma-base.c b/drivers/dma/sh/shdma-base.c index ff060d0..f75ebfa 100644 --- a/drivers/dma/sh/shdma-base.c +++ b/drivers/dma/sh/shdma-base.c @@ -76,7 +76,7 @@ static dma_cookie_t shdma_tx_submit(struct dma_async_tx_descriptor *tx) container_of(tx, struct shdma_desc, async_tx), *last = desc; struct shdma_chan *schan = to_shdma_chan(tx->chan); - struct shdma_slave *slave = tx->chan->private; + struct shdma_slave *slave = schan->slave; dma_async_tx_callback callback = tx->callback; dma_cookie_t cookie; bool power_up; @@ -208,6 +208,7 @@ static int shdma_alloc_chan_resources(struct dma_chan *chan) goto edescalloc; } schan->desc_num = NR_DESCS_PER_CHANNEL; + schan->slave = slave; for (i = 0; i < NR_DESCS_PER_CHANNEL; i++) { desc = ops->embedded_desc(schan->desc, i); @@ -365,9 +366,9 @@ static void shdma_free_chan_resources(struct dma_chan *chan) if (!list_empty(&schan->ld_queue)) shdma_chan_ld_cleanup(schan, true); - if (chan->private) { + if (schan->slave) { /* The caller is holding dma_list_mutex */ - struct shdma_slave *slave = chan->private; + struct shdma_slave *slave = schan->slave; clear_bit(slave->slave_id, shdma_slave_used); chan->private = NULL; } @@ -558,7 +559,7 @@ static struct dma_async_tx_descriptor *shdma_prep_slave_sg( struct shdma_chan *schan = to_shdma_chan(chan); struct shdma_dev *sdev = to_shdma_dev(schan->dma_chan.device); const struct shdma_ops *ops = sdev->ops; - struct shdma_slave *slave = chan->private; + struct shdma_slave *slave = schan->slave; dma_addr_t slave_addr; if (!chan) diff --git a/drivers/dma/sh/shdma.c b/drivers/dma/sh/shdma.c index f06906f..9f0a2e5 100644 --- a/drivers/dma/sh/shdma.c +++ b/drivers/dma/sh/shdma.c @@ -291,10 +291,8 @@ static void sh_dmae_setup_xfer(struct shdma_chan *schan, shdma_chan); if (sslave) { - struct sh_dmae_slave *slave = container_of(sslave, - struct sh_dmae_slave, shdma_slave); const struct sh_dmae_slave_config *cfg = - slave->config; + sh_chan->config; dmae_set_dmars(sh_chan, cfg->mid_rid); dmae_set_chcr(sh_chan, cfg->chcr); @@ -326,13 +324,11 @@ static int sh_dmae_set_slave(struct shdma_chan *schan, { struct sh_dmae_chan *sh_chan = container_of(schan, struct sh_dmae_chan, shdma_chan); - struct sh_dmae_slave *slave = container_of(sslave, struct sh_dmae_slave, - shdma_slave); const struct sh_dmae_slave_config *cfg = dmae_find_slave(sh_chan, sslave->slave_id); if (!cfg) return -ENODEV; - slave->config = cfg; + sh_chan->config = cfg; return 0; } @@ -579,13 +575,12 @@ static int sh_dmae_resume(struct device *dev) for (i = 0; i < shdev->pdata->channel_num; i++) { struct sh_dmae_chan *sh_chan = shdev->chan[i]; - struct sh_dmae_slave *param = sh_chan->shdma_chan.dma_chan.private; if (!sh_chan->shdma_chan.desc_num) continue; - if (param) { - const struct sh_dmae_slave_config *cfg = param->config; + if (sh_chan->shdma_chan.slave) { + const struct sh_dmae_slave_config *cfg = sh_chan->config; dmae_set_dmars(sh_chan, cfg->mid_rid); dmae_set_chcr(sh_chan, cfg->chcr); } else { @@ -609,14 +604,15 @@ const struct dev_pm_ops sh_dmae_pm = { static dma_addr_t sh_dmae_slave_addr(struct shdma_chan *schan) { - struct sh_dmae_slave *param = schan->dma_chan.private; + struct sh_dmae_chan *sh_chan = container_of(schan, + struct sh_dmae_chan, shdma_chan); /* - * Implicit BUG_ON(!param) - * if (param != NULL), this is a successfully requested slave channel, - * therefore param->config != NULL too. + * Implicit BUG_ON(!sh_chan->config) + * This is an exclusive slave DMA operation, may only be called after a + * successful slave configuration. */ - return param->config->addr; + return sh_chan->config->addr; } static struct shdma_desc *sh_dmae_embedded_desc(void *buf, int i) diff --git a/drivers/dma/sh/shdma.h b/drivers/dma/sh/shdma.h index 840e47d..9314e93 100644 --- a/drivers/dma/sh/shdma.h +++ b/drivers/dma/sh/shdma.h @@ -13,6 +13,7 @@ #ifndef __DMA_SHDMA_H #define __DMA_SHDMA_H +#include <linux/sh_dma.h> #include <linux/shdma-base.h> #include <linux/dmaengine.h> #include <linux/interrupt.h> @@ -25,6 +26,7 @@ struct device; struct sh_dmae_chan { struct shdma_chan shdma_chan; + const struct sh_dmae_slave_config *config; /* Slave DMA configuration */ int xmit_shift; /* log_2(bytes_per_xfer) */ u32 __iomem *base; char dev_id[16]; /* unique name per DMAC of channel */ diff --git a/include/linux/sh_dma.h b/include/linux/sh_dma.h index 7c8ca41..a79f10a 100644 --- a/include/linux/sh_dma.h +++ b/include/linux/sh_dma.h @@ -20,8 +20,6 @@ struct device; /* Used by slave DMA clients to request DMA to/from a specific peripheral */ struct sh_dmae_slave { struct shdma_slave shdma_slave; /* Set by the platform */ - struct device *dma_dev; /* Set by the platform */ - const struct sh_dmae_slave_config *config; /* Set by the driver */ }; /* diff --git a/include/linux/shdma-base.h b/include/linux/shdma-base.h index 83efd13..c3a19e9 100644 --- a/include/linux/shdma-base.h +++ b/include/linux/shdma-base.h @@ -66,6 +66,7 @@ struct shdma_chan { size_t max_xfer_len; /* max transfer length */ int id; /* Raw id of this channel */ int irq; /* Channel IRQ */ + struct shdma_slave *slave; /* Client data for slave DMA */ enum shdma_pm_state pm_state; }; |