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-rw-r--r--drivers/dma/amba-pl08x.c2
-rw-r--r--drivers/dma/dmatest.c46
-rw-r--r--drivers/dma/mv_xor.c11
-rw-r--r--drivers/dma/mxs-dma.c8
-rw-r--r--drivers/dma/pl330.c102
5 files changed, 94 insertions, 75 deletions
diff --git a/drivers/dma/amba-pl08x.c b/drivers/dma/amba-pl08x.c
index 9ebceca..8a28158 100644
--- a/drivers/dma/amba-pl08x.c
+++ b/drivers/dma/amba-pl08x.c
@@ -2057,6 +2057,8 @@ static struct amba_id pl08x_ids[] = {
{ 0, 0 },
};
+MODULE_DEVICE_TABLE(amba, pl08x_ids);
+
static struct amba_driver pl08x_amba_driver = {
.drv.name = DRIVER_NAME,
.id_table = pl08x_ids,
diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c
index eb1d864..2b8661b 100644
--- a/drivers/dma/dmatest.c
+++ b/drivers/dma/dmatest.c
@@ -214,9 +214,18 @@ static unsigned int dmatest_verify(u8 **bufs, unsigned int start,
return error_count;
}
-static void dmatest_callback(void *completion)
+/* poor man's completion - we want to use wait_event_freezable() on it */
+struct dmatest_done {
+ bool done;
+ wait_queue_head_t *wait;
+};
+
+static void dmatest_callback(void *arg)
{
- complete(completion);
+ struct dmatest_done *done = arg;
+
+ done->done = true;
+ wake_up_all(done->wait);
}
/*
@@ -235,7 +244,9 @@ static void dmatest_callback(void *completion)
*/
static int dmatest_func(void *data)
{
+ DECLARE_WAIT_QUEUE_HEAD_ONSTACK(done_wait);
struct dmatest_thread *thread = data;
+ struct dmatest_done done = { .wait = &done_wait };
struct dma_chan *chan;
const char *thread_name;
unsigned int src_off, dst_off, len;
@@ -252,7 +263,7 @@ static int dmatest_func(void *data)
int i;
thread_name = current->comm;
- set_freezable_with_signal();
+ set_freezable();
ret = -ENOMEM;
@@ -306,9 +317,6 @@ static int dmatest_func(void *data)
struct dma_async_tx_descriptor *tx = NULL;
dma_addr_t dma_srcs[src_cnt];
dma_addr_t dma_dsts[dst_cnt];
- struct completion cmp;
- unsigned long start, tmo, end = 0 /* compiler... */;
- bool reload = true;
u8 align = 0;
total_tests++;
@@ -391,9 +399,9 @@ static int dmatest_func(void *data)
continue;
}
- init_completion(&cmp);
+ done.done = false;
tx->callback = dmatest_callback;
- tx->callback_param = &cmp;
+ tx->callback_param = &done;
cookie = tx->tx_submit(tx);
if (dma_submit_error(cookie)) {
@@ -407,20 +415,20 @@ static int dmatest_func(void *data)
}
dma_async_issue_pending(chan);
- do {
- start = jiffies;
- if (reload)
- end = start + msecs_to_jiffies(timeout);
- else if (end <= start)
- end = start + 1;
- tmo = wait_for_completion_interruptible_timeout(&cmp,
- end - start);
- reload = try_to_freeze();
- } while (tmo == -ERESTARTSYS);
+ wait_event_freezable_timeout(done_wait, done.done,
+ msecs_to_jiffies(timeout));
status = dma_async_is_tx_complete(chan, cookie, NULL, NULL);
- if (tmo == 0) {
+ if (!done.done) {
+ /*
+ * We're leaving the timed out dma operation with
+ * dangling pointer to done_wait. To make this
+ * correct, we'll need to allocate wait_done for
+ * each test iteration and perform "who's gonna
+ * free it this time?" dancing. For now, just
+ * leave it dangling.
+ */
pr_warning("%s: #%u: test timed out\n",
thread_name, total_tests - 1);
failed_tests++;
diff --git a/drivers/dma/mv_xor.c b/drivers/dma/mv_xor.c
index 9a353c2..e779b43 100644
--- a/drivers/dma/mv_xor.c
+++ b/drivers/dma/mv_xor.c
@@ -1250,7 +1250,7 @@ static int __devinit mv_xor_probe(struct platform_device *pdev)
static void
mv_xor_conf_mbus_windows(struct mv_xor_shared_private *msp,
- struct mbus_dram_target_info *dram)
+ const struct mbus_dram_target_info *dram)
{
void __iomem *base = msp->xor_base;
u32 win_enable = 0;
@@ -1264,7 +1264,7 @@ mv_xor_conf_mbus_windows(struct mv_xor_shared_private *msp,
}
for (i = 0; i < dram->num_cs; i++) {
- struct mbus_dram_window *cs = dram->cs + i;
+ const struct mbus_dram_window *cs = dram->cs + i;
writel((cs->base & 0xffff0000) |
(cs->mbus_attr << 8) |
@@ -1290,7 +1290,7 @@ static struct platform_driver mv_xor_driver = {
static int mv_xor_shared_probe(struct platform_device *pdev)
{
- struct mv_xor_platform_shared_data *msd = pdev->dev.platform_data;
+ const struct mbus_dram_target_info *dram;
struct mv_xor_shared_private *msp;
struct resource *res;
@@ -1323,8 +1323,9 @@ static int mv_xor_shared_probe(struct platform_device *pdev)
/*
* (Re-)program MBUS remapping windows if we are asked to.
*/
- if (msd != NULL && msd->dram != NULL)
- mv_xor_conf_mbus_windows(msp, msd->dram);
+ dram = mv_mbus_dram_info();
+ if (dram)
+ mv_xor_conf_mbus_windows(msp, dram);
return 0;
}
diff --git a/drivers/dma/mxs-dma.c b/drivers/dma/mxs-dma.c
index 493af2f..b06cd4c 100644
--- a/drivers/dma/mxs-dma.c
+++ b/drivers/dma/mxs-dma.c
@@ -311,7 +311,7 @@ static int mxs_dma_alloc_chan_resources(struct dma_chan *chan)
goto err_irq;
}
- ret = clk_enable(mxs_dma->clk);
+ ret = clk_prepare_enable(mxs_dma->clk);
if (ret)
goto err_clk;
@@ -346,7 +346,7 @@ static void mxs_dma_free_chan_resources(struct dma_chan *chan)
dma_free_coherent(mxs_dma->dma_device.dev, PAGE_SIZE,
mxs_chan->ccw, mxs_chan->ccw_phys);
- clk_disable(mxs_dma->clk);
+ clk_disable_unprepare(mxs_dma->clk);
}
static struct dma_async_tx_descriptor *mxs_dma_prep_slave_sg(
@@ -554,7 +554,7 @@ static int __init mxs_dma_init(struct mxs_dma_engine *mxs_dma)
{
int ret;
- ret = clk_enable(mxs_dma->clk);
+ ret = clk_prepare_enable(mxs_dma->clk);
if (ret)
return ret;
@@ -581,7 +581,7 @@ static int __init mxs_dma_init(struct mxs_dma_engine *mxs_dma)
mxs_dma->base + HW_APBHX_CTRL1 + MXS_SET_ADDR);
err_out:
- clk_disable(mxs_dma->clk);
+ clk_disable_unprepare(mxs_dma->clk);
return ret;
}
diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
index a573757..b8ec03e 100644
--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c
@@ -19,6 +19,7 @@
#include <linux/amba/pl330.h>
#include <linux/pm_runtime.h>
#include <linux/scatterlist.h>
+#include <linux/of.h>
#define NR_DEFAULT_DESC 16
@@ -116,6 +117,9 @@ struct dma_pl330_desc {
struct dma_pl330_chan *pchan;
};
+/* forward declaration */
+static struct amba_driver pl330_driver;
+
static inline struct dma_pl330_chan *
to_pchan(struct dma_chan *ch)
{
@@ -267,6 +271,32 @@ static void dma_pl330_rqcb(void *token, enum pl330_op_err err)
tasklet_schedule(&pch->task);
}
+bool pl330_filter(struct dma_chan *chan, void *param)
+{
+ u8 *peri_id;
+
+ if (chan->device->dev->driver != &pl330_driver.drv)
+ return false;
+
+#ifdef CONFIG_OF
+ if (chan->device->dev->of_node) {
+ const __be32 *prop_value;
+ phandle phandle;
+ struct device_node *node;
+
+ prop_value = ((struct property *)param)->value;
+ phandle = be32_to_cpup(prop_value++);
+ node = of_find_node_by_phandle(phandle);
+ return ((chan->private == node) &&
+ (chan->chan_id == be32_to_cpup(prop_value)));
+ }
+#endif
+
+ peri_id = chan->private;
+ return *peri_id == (unsigned)param;
+}
+EXPORT_SYMBOL(pl330_filter);
+
static int pl330_alloc_chan_resources(struct dma_chan *chan)
{
struct dma_pl330_chan *pch = to_pchan(chan);
@@ -497,7 +527,7 @@ pluck_desc(struct dma_pl330_dmac *pdmac)
static struct dma_pl330_desc *pl330_get_desc(struct dma_pl330_chan *pch)
{
struct dma_pl330_dmac *pdmac = pch->dmac;
- struct dma_pl330_peri *peri = pch->chan.private;
+ u8 *peri_id = pch->chan.private;
struct dma_pl330_desc *desc;
/* Pluck one desc from the pool of DMAC */
@@ -522,13 +552,7 @@ static struct dma_pl330_desc *pl330_get_desc(struct dma_pl330_chan *pch)
desc->txd.cookie = 0;
async_tx_ack(&desc->txd);
- if (peri) {
- desc->req.rqtype = peri->rqtype;
- desc->req.peri = pch->chan.chan_id;
- } else {
- desc->req.rqtype = MEMTOMEM;
- desc->req.peri = 0;
- }
+ desc->req.peri = peri_id ? pch->chan.chan_id : 0;
dma_async_tx_descriptor_init(&desc->txd, &pch->chan);
@@ -615,12 +639,14 @@ static struct dma_async_tx_descriptor *pl330_prep_dma_cyclic(
case DMA_MEM_TO_DEV:
desc->rqcfg.src_inc = 1;
desc->rqcfg.dst_inc = 0;
+ desc->req.rqtype = MEMTODEV;
src = dma_addr;
dst = pch->fifo_addr;
break;
case DMA_DEV_TO_MEM:
desc->rqcfg.src_inc = 0;
desc->rqcfg.dst_inc = 1;
+ desc->req.rqtype = DEVTOMEM;
src = pch->fifo_addr;
dst = dma_addr;
break;
@@ -646,16 +672,12 @@ pl330_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dst,
{
struct dma_pl330_desc *desc;
struct dma_pl330_chan *pch = to_pchan(chan);
- struct dma_pl330_peri *peri = chan->private;
struct pl330_info *pi;
int burst;
if (unlikely(!pch || !len))
return NULL;
- if (peri && peri->rqtype != MEMTOMEM)
- return NULL;
-
pi = &pch->dmac->pif;
desc = __pl330_prep_dma_memcpy(pch, dst, src, len);
@@ -664,6 +686,7 @@ pl330_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dst,
desc->rqcfg.src_inc = 1;
desc->rqcfg.dst_inc = 1;
+ desc->req.rqtype = MEMTOMEM;
/* Select max possible burst size */
burst = pi->pcfg.data_bus_width / 8;
@@ -692,25 +715,14 @@ pl330_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
{
struct dma_pl330_desc *first, *desc = NULL;
struct dma_pl330_chan *pch = to_pchan(chan);
- struct dma_pl330_peri *peri = chan->private;
struct scatterlist *sg;
unsigned long flags;
int i;
dma_addr_t addr;
- if (unlikely(!pch || !sgl || !sg_len || !peri))
+ if (unlikely(!pch || !sgl || !sg_len))
return NULL;
- /* Make sure the direction is consistent */
- if ((direction == DMA_MEM_TO_DEV &&
- peri->rqtype != MEMTODEV) ||
- (direction == DMA_DEV_TO_MEM &&
- peri->rqtype != DEVTOMEM)) {
- dev_err(pch->dmac->pif.dev, "%s:%d Invalid Direction\n",
- __func__, __LINE__);
- return NULL;
- }
-
addr = pch->fifo_addr;
first = NULL;
@@ -750,11 +762,13 @@ pl330_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
if (direction == DMA_MEM_TO_DEV) {
desc->rqcfg.src_inc = 1;
desc->rqcfg.dst_inc = 0;
+ desc->req.rqtype = MEMTODEV;
fill_px(&desc->px,
addr, sg_dma_address(sg), sg_dma_len(sg));
} else {
desc->rqcfg.src_inc = 0;
desc->rqcfg.dst_inc = 1;
+ desc->req.rqtype = DEVTOMEM;
fill_px(&desc->px,
sg_dma_address(sg), addr, sg_dma_len(sg));
}
@@ -846,33 +860,16 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id)
INIT_LIST_HEAD(&pd->channels);
/* Initialize channel parameters */
- num_chan = max(pdat ? (int)pdat->nr_valid_peri : 0,
- (int)pi->pcfg.num_chan);
+ num_chan = max(pdat ? pdat->nr_valid_peri : (u8)pi->pcfg.num_peri,
+ (u8)pi->pcfg.num_chan);
pdmac->peripherals = kzalloc(num_chan * sizeof(*pch), GFP_KERNEL);
for (i = 0; i < num_chan; i++) {
pch = &pdmac->peripherals[i];
- if (pdat) {
- struct dma_pl330_peri *peri = &pdat->peri[i];
-
- switch (peri->rqtype) {
- case MEMTOMEM:
- dma_cap_set(DMA_MEMCPY, pd->cap_mask);
- break;
- case MEMTODEV:
- case DEVTOMEM:
- dma_cap_set(DMA_SLAVE, pd->cap_mask);
- dma_cap_set(DMA_CYCLIC, pd->cap_mask);
- break;
- default:
- dev_err(&adev->dev, "DEVTODEV Not Supported\n");
- continue;
- }
- pch->chan.private = peri;
- } else {
- dma_cap_set(DMA_MEMCPY, pd->cap_mask);
- pch->chan.private = NULL;
- }
+ if (!adev->dev.of_node)
+ pch->chan.private = pdat ? &pdat->peri_id[i] : NULL;
+ else
+ pch->chan.private = adev->dev.of_node;
INIT_LIST_HEAD(&pch->work_list);
spin_lock_init(&pch->lock);
@@ -885,6 +882,15 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id)
}
pd->dev = &adev->dev;
+ if (pdat) {
+ pd->cap_mask = pdat->cap_mask;
+ } else {
+ dma_cap_set(DMA_MEMCPY, pd->cap_mask);
+ if (pi->pcfg.num_peri) {
+ dma_cap_set(DMA_SLAVE, pd->cap_mask);
+ dma_cap_set(DMA_CYCLIC, pd->cap_mask);
+ }
+ }
pd->device_alloc_chan_resources = pl330_alloc_chan_resources;
pd->device_free_chan_resources = pl330_free_chan_resources;
@@ -978,6 +984,8 @@ static struct amba_id pl330_ids[] = {
{ 0, 0 },
};
+MODULE_DEVICE_TABLE(amba, pl330_ids);
+
#ifdef CONFIG_PM_RUNTIME
static int pl330_runtime_suspend(struct device *dev)
{
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