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Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma

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Pull slave-dma updates from Vinod Koul:
 - new driver for BCM2835 used in R-pi
 - new driver for MOXA ART
 - dma_get_any_slave_channel API for DT based systems
 - minor fixes and updates spread acrooss driver

[ The fsl-ssi dual fifo mode support addition clashed badly with the
  other changes to fsl-ssi that came in through the sound merge.  I did
  a very rough cut at fixing up the conflict, but Nicolin Chen (author
  of both sides) will need to verify and check things ]

* 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma: (36 commits)
  dmaengine: mmp_pdma: fix mismerge
  dma: pl08x: Export pl08x_filter_id
  acpi-dma: align documentation with kernel-doc format
  dma: fix vchan_cookie_complete() debug print
  DMA: dmatest: extend the "device" module parameter to 32 characters
  drivers/dma: fix error return code
  dma: omap: Set debug level to debugging messages
  dmaengine: fix kernel-doc style typos for few comments
  dma: tegra: add support for Tegra148/124
  dma: dw: use %pad instead of casting dma_addr_t
  dma: dw: join split up messages
  dma: dw: fix style of multiline comment
  dmaengine: k3dma: fix sparse warnings
  dma: pl330: Use dma_get_slave_channel() in the of xlate callback
  dma: pl330: Differentiate between submitted and issued descriptors
  dmaengine: sirf: Add device_slave_caps interface
  DMA: Freescale: change BWC from 256 bytes to 1024 bytes
  dmaengine: Add MOXA ART DMA engine driver
  dmaengine: Add DMA_PRIVATE to BCM2835 driver
  dma: imx-sdma: Assign a default script number for ROM firmware cases
  ...
This commit is contained in:
Linus Torvalds
2014-01-29 20:27:23 -08:00
rodzic e9e352e910 15cec530e4
commit ca2a650f3d
30 zmienionych plików z 1882 dodań i 199 usunięć
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65
drivers/dma/pl330.c
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@@ -543,7 +543,9 @@ struct dma_pl330_chan {
/* DMA-Engine Channel */
struct dma_chan chan;
/* List of to be xfered descriptors */
/* List of submitted descriptors */
struct list_head submitted_list;
/* List of issued descriptors */
struct list_head work_list;
/* List of completed descriptors */
struct list_head completed_list;
@@ -578,12 +580,16 @@ struct dma_pl330_dmac {
/* DMA-Engine Device */
struct dma_device ddma;
/* Holds info about sg limitations */
struct device_dma_parameters dma_parms;
/* Pool of descriptors available for the DMAC's channels */
struct list_head desc_pool;
/* To protect desc_pool manipulation */
spinlock_t pool_lock;
/* Peripheral channels connected to this DMAC */
unsigned int num_peripherals;
struct dma_pl330_chan *peripherals; /* keep at end */
};
@@ -606,11 +612,6 @@ struct dma_pl330_desc {
struct dma_pl330_chan *pchan;
};
struct dma_pl330_filter_args {
struct dma_pl330_dmac *pdmac;
unsigned int chan_id;
};
static inline void _callback(struct pl330_req *r, enum pl330_op_err err)
{
if (r && r->xfer_cb)
@@ -2298,16 +2299,6 @@ static void dma_pl330_rqcb(void *token, enum pl330_op_err err)
tasklet_schedule(&pch->task);
}
static bool pl330_dt_filter(struct dma_chan *chan, void *param)
{
struct dma_pl330_filter_args *fargs = param;
if (chan->device != &fargs->pdmac->ddma)
return false;
return (chan->chan_id == fargs->chan_id);
}
bool pl330_filter(struct dma_chan *chan, void *param)
{
u8 *peri_id;
@@ -2325,23 +2316,16 @@ static struct dma_chan *of_dma_pl330_xlate(struct of_phandle_args *dma_spec,
{
int count = dma_spec->args_count;
struct dma_pl330_dmac *pdmac = ofdma->of_dma_data;
struct dma_pl330_filter_args fargs;
dma_cap_mask_t cap;
if (!pdmac)
return NULL;
unsigned int chan_id;
if (count != 1)
return NULL;
fargs.pdmac = pdmac;
fargs.chan_id = dma_spec->args[0];
chan_id = dma_spec->args[0];
if (chan_id >= pdmac->num_peripherals)
return NULL;
dma_cap_zero(cap);
dma_cap_set(DMA_SLAVE, cap);
dma_cap_set(DMA_CYCLIC, cap);
return dma_request_channel(cap, pl330_dt_filter, &fargs);
return dma_get_slave_channel(&pdmac->peripherals[chan_id].chan);
}
static int pl330_alloc_chan_resources(struct dma_chan *chan)
@@ -2385,6 +2369,11 @@ static int pl330_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd, unsigned
pl330_chan_ctrl(pch->pl330_chid, PL330_OP_FLUSH);
/* Mark all desc done */
list_for_each_entry(desc, &pch->submitted_list, node) {
desc->status = FREE;
dma_cookie_complete(&desc->txd);
}
list_for_each_entry(desc, &pch->work_list , node) {
desc->status = FREE;
dma_cookie_complete(&desc->txd);
@@ -2395,6 +2384,7 @@ static int pl330_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd, unsigned
dma_cookie_complete(&desc->txd);
}
list_splice_tail_init(&pch->submitted_list, &pdmac->desc_pool);
list_splice_tail_init(&pch->work_list, &pdmac->desc_pool);
list_splice_tail_init(&pch->completed_list, &pdmac->desc_pool);
spin_unlock_irqrestore(&pch->lock, flags);
@@ -2453,7 +2443,14 @@ pl330_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
static void pl330_issue_pending(struct dma_chan *chan)
{
pl330_tasklet((unsigned long) to_pchan(chan));
struct dma_pl330_chan *pch = to_pchan(chan);
unsigned long flags;
spin_lock_irqsave(&pch->lock, flags);
list_splice_tail_init(&pch->submitted_list, &pch->work_list);
spin_unlock_irqrestore(&pch->lock, flags);
pl330_tasklet((unsigned long)pch);
}
/*
@@ -2480,11 +2477,11 @@ static dma_cookie_t pl330_tx_submit(struct dma_async_tx_descriptor *tx)
dma_cookie_assign(&desc->txd);
list_move_tail(&desc->node, &pch->work_list);
list_move_tail(&desc->node, &pch->submitted_list);
}
cookie = dma_cookie_assign(&last->txd);
list_add_tail(&last->node, &pch->work_list);
list_add_tail(&last->node, &pch->submitted_list);
spin_unlock_irqrestore(&pch->lock, flags);
return cookie;
@@ -2960,6 +2957,8 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id)
else
num_chan = max_t(int, pi->pcfg.num_peri, pi->pcfg.num_chan);
pdmac->num_peripherals = num_chan;
pdmac->peripherals = kzalloc(num_chan * sizeof(*pch), GFP_KERNEL);
if (!pdmac->peripherals) {
ret = -ENOMEM;
@@ -2974,6 +2973,7 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id)
else
pch->chan.private = adev->dev.of_node;
INIT_LIST_HEAD(&pch->submitted_list);
INIT_LIST_HEAD(&pch->work_list);
INIT_LIST_HEAD(&pch->completed_list);
spin_lock_init(&pch->lock);
@@ -3021,6 +3021,9 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id)
"unable to register DMA to the generic DT DMA helpers\n");
}
}
adev->dev.dma_parms = &pdmac->dma_parms;
/*
* This is the limit for transfers with a buswidth of 1, larger
* buswidths will have larger limits.