return 0;
}
+static void sh_chan_xfer_ld_queue(struct sh_dmae_chan *sh_chan);
+
static dma_cookie_t sh_dmae_tx_submit(struct dma_async_tx_descriptor *tx)
{
struct sh_desc *desc = tx_to_sh_desc(tx), *chunk, *last = desc, *c;
struct sh_dmae_chan *sh_chan = to_sh_chan(tx->chan);
+ struct sh_dmae_slave *param = tx->chan->private;
dma_async_tx_callback callback = tx->callback;
dma_cookie_t cookie;
+ bool power_up;
+
+ spin_lock_irq(&sh_chan->desc_lock);
- spin_lock_bh(&sh_chan->desc_lock);
+ if (list_empty(&sh_chan->ld_queue))
+ power_up = true;
+ else
+ power_up = false;
cookie = sh_chan->common.cookie;
cookie++;
tx->cookie, &last->async_tx, sh_chan->id,
desc->hw.sar, desc->hw.tcr, desc->hw.dar);
- spin_unlock_bh(&sh_chan->desc_lock);
+ if (power_up) {
+ sh_chan->pm_state = DMAE_PM_BUSY;
+
+ pm_runtime_get(sh_chan->dev);
+
+ spin_unlock_irq(&sh_chan->desc_lock);
+
+ pm_runtime_barrier(sh_chan->dev);
+
+ spin_lock_irq(&sh_chan->desc_lock);
+
+ /* Have we been reset, while waiting? */
+ if (sh_chan->pm_state != DMAE_PM_ESTABLISHED) {
+ dev_dbg(sh_chan->dev, "Bring up channel %d\n",
+ sh_chan->id);
+ if (param) {
+ const struct sh_dmae_slave_config *cfg =
+ param->config;
+
+ dmae_set_dmars(sh_chan, cfg->mid_rid);
+ dmae_set_chcr(sh_chan, cfg->chcr);
+ } else {
+ dmae_init(sh_chan);
+ }
+
+ if (sh_chan->pm_state == DMAE_PM_PENDING)
+ sh_chan_xfer_ld_queue(sh_chan);
+ sh_chan->pm_state = DMAE_PM_ESTABLISHED;
+ }
+ }
+
+ spin_unlock_irq(&sh_chan->desc_lock);
return cookie;
}
struct sh_dmae_slave *param = chan->private;
int ret;
- pm_runtime_get_sync(sh_chan->dev);
-
/*
* This relies on the guarantee from dmaengine that alloc_chan_resources
* never runs concurrently with itself or free_chan_resources.
}
param->config = cfg;
-
- dmae_set_dmars(sh_chan, cfg->mid_rid);
- dmae_set_chcr(sh_chan, cfg->chcr);
- } else {
- dmae_init(sh_chan);
}
- spin_lock_bh(&sh_chan->desc_lock);
while (sh_chan->descs_allocated < NR_DESCS_PER_CHANNEL) {
- spin_unlock_bh(&sh_chan->desc_lock);
desc = kzalloc(sizeof(struct sh_desc), GFP_KERNEL);
- if (!desc) {
- spin_lock_bh(&sh_chan->desc_lock);
+ if (!desc)
break;
- }
dma_async_tx_descriptor_init(&desc->async_tx,
&sh_chan->common);
desc->async_tx.tx_submit = sh_dmae_tx_submit;
desc->mark = DESC_IDLE;
- spin_lock_bh(&sh_chan->desc_lock);
list_add(&desc->node, &sh_chan->ld_free);
sh_chan->descs_allocated++;
}
- spin_unlock_bh(&sh_chan->desc_lock);
if (!sh_chan->descs_allocated) {
ret = -ENOMEM;
clear_bit(param->slave_id, sh_dmae_slave_used);
etestused:
efindslave:
- pm_runtime_put(sh_chan->dev);
+ chan->private = NULL;
return ret;
}
struct sh_dmae_chan *sh_chan = to_sh_chan(chan);
struct sh_desc *desc, *_desc;
LIST_HEAD(list);
- int descs = sh_chan->descs_allocated;
/* Protect against ISR */
spin_lock_irq(&sh_chan->desc_lock);
chan->private = NULL;
}
- spin_lock_bh(&sh_chan->desc_lock);
+ spin_lock_irq(&sh_chan->desc_lock);
list_splice_init(&sh_chan->ld_free, &list);
sh_chan->descs_allocated = 0;
- spin_unlock_bh(&sh_chan->desc_lock);
-
- if (descs > 0)
- pm_runtime_put(sh_chan->dev);
+ spin_unlock_irq(&sh_chan->desc_lock);
list_for_each_entry_safe(desc, _desc, &list, node)
kfree(desc);
struct sh_desc *first = NULL, *new = NULL /* compiler... */;
LIST_HEAD(tx_list);
int chunks = 0;
+ unsigned long irq_flags;
int i;
if (!sg_len)
(SH_DMA_TCR_MAX + 1);
/* Have to lock the whole loop to protect against concurrent release */
- spin_lock_bh(&sh_chan->desc_lock);
+ spin_lock_irqsave(&sh_chan->desc_lock, irq_flags);
/*
* Chaining:
/* Put them back on the free list, so, they don't get lost */
list_splice_tail(&tx_list, &sh_chan->ld_free);
- spin_unlock_bh(&sh_chan->desc_lock);
+ spin_unlock_irqrestore(&sh_chan->desc_lock, irq_flags);
return &first->async_tx;
new->mark = DESC_IDLE;
list_splice(&tx_list, &sh_chan->ld_free);
- spin_unlock_bh(&sh_chan->desc_lock);
+ spin_unlock_irqrestore(&sh_chan->desc_lock, irq_flags);
return NULL;
}
unsigned long arg)
{
struct sh_dmae_chan *sh_chan = to_sh_chan(chan);
+ unsigned long flags;
/* Only supports DMA_TERMINATE_ALL */
if (cmd != DMA_TERMINATE_ALL)
if (!chan)
return -EINVAL;
- spin_lock_bh(&sh_chan->desc_lock);
+ spin_lock_irqsave(&sh_chan->desc_lock, flags);
dmae_halt(sh_chan);
if (!list_empty(&sh_chan->ld_queue)) {
struct sh_desc, node);
desc->partial = (desc->hw.tcr - sh_dmae_readl(sh_chan, TCR)) <<
sh_chan->xmit_shift;
-
}
- spin_unlock_bh(&sh_chan->desc_lock);
+ spin_unlock_irqrestore(&sh_chan->desc_lock, flags);
sh_dmae_chan_ld_cleanup(sh_chan, true);
dma_cookie_t cookie = 0;
dma_async_tx_callback callback = NULL;
void *param = NULL;
+ unsigned long flags;
- spin_lock_bh(&sh_chan->desc_lock);
+ spin_lock_irqsave(&sh_chan->desc_lock, flags);
list_for_each_entry_safe(desc, _desc, &sh_chan->ld_queue, node) {
struct dma_async_tx_descriptor *tx = &desc->async_tx;
async_tx_test_ack(&desc->async_tx)) || all) {
/* Remove from ld_queue list */
desc->mark = DESC_IDLE;
+
list_move(&desc->node, &sh_chan->ld_free);
+
+ if (list_empty(&sh_chan->ld_queue)) {
+ dev_dbg(sh_chan->dev, "Bring down channel %d\n", sh_chan->id);
+ pm_runtime_put(sh_chan->dev);
+ }
}
}
*/
sh_chan->completed_cookie = sh_chan->common.cookie;
- spin_unlock_bh(&sh_chan->desc_lock);
+ spin_unlock_irqrestore(&sh_chan->desc_lock, flags);
if (callback)
callback(param);
;
}
+/* Called under spin_lock_irq(&sh_chan->desc_lock) */
static void sh_chan_xfer_ld_queue(struct sh_dmae_chan *sh_chan)
{
struct sh_desc *desc;
- spin_lock_bh(&sh_chan->desc_lock);
/* DMA work check */
if (dmae_is_busy(sh_chan))
- goto sh_chan_xfer_ld_queue_end;
+ return;
/* Find the first not transferred descriptor */
list_for_each_entry(desc, &sh_chan->ld_queue, node)
dmae_start(sh_chan);
break;
}
-
-sh_chan_xfer_ld_queue_end:
- spin_unlock_bh(&sh_chan->desc_lock);
}
static void sh_dmae_memcpy_issue_pending(struct dma_chan *chan)
{
struct sh_dmae_chan *sh_chan = to_sh_chan(chan);
- sh_chan_xfer_ld_queue(sh_chan);
+
+ spin_lock_irq(&sh_chan->desc_lock);
+ if (sh_chan->pm_state == DMAE_PM_ESTABLISHED)
+ sh_chan_xfer_ld_queue(sh_chan);
+ else
+ sh_chan->pm_state = DMAE_PM_PENDING;
+ spin_unlock_irq(&sh_chan->desc_lock);
}
static enum dma_status sh_dmae_tx_status(struct dma_chan *chan,
dma_cookie_t last_used;
dma_cookie_t last_complete;
enum dma_status status;
+ unsigned long flags;
sh_dmae_chan_ld_cleanup(sh_chan, false);
BUG_ON(last_complete < 0);
dma_set_tx_state(txstate, last_complete, last_used, 0);
- spin_lock_bh(&sh_chan->desc_lock);
+ spin_lock_irqsave(&sh_chan->desc_lock, flags);
status = dma_async_is_complete(cookie, last_complete, last_used);
}
}
- spin_unlock_bh(&sh_chan->desc_lock);
+ spin_unlock_irqrestore(&sh_chan->desc_lock, flags);
return status;
}
list_splice_init(&sh_chan->ld_queue, &dl);
+ if (!list_empty(&dl)) {
+ dev_dbg(sh_chan->dev, "Bring down channel %d\n", sh_chan->id);
+ pm_runtime_put(sh_chan->dev);
+ }
+ sh_chan->pm_state = DMAE_PM_ESTABLISHED;
+
spin_unlock(&sh_chan->desc_lock);
/* Complete all */
u32 sar_buf = sh_dmae_readl(sh_chan, SAR);
u32 dar_buf = sh_dmae_readl(sh_chan, DAR);
- spin_lock(&sh_chan->desc_lock);
+ spin_lock_irq(&sh_chan->desc_lock);
list_for_each_entry(desc, &sh_chan->ld_queue, node) {
if (desc->mark == DESC_SUBMITTED &&
((desc->direction == DMA_FROM_DEVICE &&
break;
}
}
- spin_unlock(&sh_chan->desc_lock);
-
/* Next desc */
sh_chan_xfer_ld_queue(sh_chan);
+ spin_unlock_irq(&sh_chan->desc_lock);
+
sh_dmae_chan_ld_cleanup(sh_chan, false);
}
return -ENOMEM;
}
- /* copy struct dma_device */
+ new_sh_chan->pm_state = DMAE_PM_ESTABLISHED;
+
+ /* reference struct dma_device */
new_sh_chan->common.device = &shdev->common;
new_sh_chan->dev = shdev->common.dev;
git.openpandora.org / pandora-kernel.git / blobdiff