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-rw-r--r--drivers/dma/TODO1
-rw-r--r--drivers/dma/amba-pl08x.c246
-rw-r--r--drivers/dma/at_hdmac.c4
-rw-r--r--drivers/dma/coh901318.c19
-rw-r--r--drivers/dma/dmaengine.c4
-rw-r--r--drivers/dma/ep93xx_dma.c2
-rw-r--r--drivers/dma/imx-sdma.c4
-rw-r--r--drivers/dma/intel_mid_dma.c2
-rw-r--r--drivers/dma/ipu/ipu_idmac.c6
-rw-r--r--drivers/dma/mv_xor.c3
-rw-r--r--drivers/dma/mxs-dma.c13
-rw-r--r--drivers/dma/pch_dma.c127
-rw-r--r--drivers/dma/pl330.c64
-rw-r--r--drivers/dma/ste_dma40.c270
-rw-r--r--drivers/dma/ste_dma40_ll.h3
15 files changed, 442 insertions, 326 deletions
diff --git a/drivers/dma/TODO b/drivers/dma/TODO
index a4af8589330..734ed0206cd 100644
--- a/drivers/dma/TODO
+++ b/drivers/dma/TODO
@@ -9,6 +9,5 @@ TODO for slave dma
- mxs-dma.c
- dw_dmac
- intel_mid_dma
- - ste_dma40
4. Check other subsystems for dma drivers and merge/move to dmaengine
5. Remove dma_slave_config's dma direction.
diff --git a/drivers/dma/amba-pl08x.c b/drivers/dma/amba-pl08x.c
index e6d7228b147..196a7378d33 100644
--- a/drivers/dma/amba-pl08x.c
+++ b/drivers/dma/amba-pl08x.c
@@ -156,14 +156,10 @@ struct pl08x_driver_data {
#define PL08X_BOUNDARY_SHIFT (10) /* 1KB 0x400 */
#define PL08X_BOUNDARY_SIZE (1 << PL08X_BOUNDARY_SHIFT)
-/* Minimum period between work queue runs */
-#define PL08X_WQ_PERIODMIN 20
-
/* Size (bytes) of each LLI buffer allocated for one transfer */
# define PL08X_LLI_TSFR_SIZE 0x2000
/* Maximum times we call dma_pool_alloc on this pool without freeing */
-#define PL08X_MAX_ALLOCS 0x40
#define MAX_NUM_TSFR_LLIS (PL08X_LLI_TSFR_SIZE/sizeof(struct pl08x_lli))
#define PL08X_ALIGN 8
@@ -495,10 +491,10 @@ static inline u32 pl08x_cctl_bits(u32 cctl, u8 srcwidth, u8 dstwidth,
struct pl08x_lli_build_data {
struct pl08x_txd *txd;
- struct pl08x_driver_data *pl08x;
struct pl08x_bus_data srcbus;
struct pl08x_bus_data dstbus;
size_t remainder;
+ u32 lli_bus;
};
/*
@@ -551,8 +547,7 @@ static void pl08x_fill_lli_for_desc(struct pl08x_lli_build_data *bd,
llis_va[num_llis].src = bd->srcbus.addr;
llis_va[num_llis].dst = bd->dstbus.addr;
llis_va[num_llis].lli = llis_bus + (num_llis + 1) * sizeof(struct pl08x_lli);
- if (bd->pl08x->lli_buses & PL08X_AHB2)
- llis_va[num_llis].lli |= PL080_LLI_LM_AHB2;
+ llis_va[num_llis].lli |= bd->lli_bus;
if (cctl & PL080_CONTROL_SRC_INCR)
bd->srcbus.addr += len;
@@ -605,9 +600,9 @@ static int pl08x_fill_llis_for_desc(struct pl08x_driver_data *pl08x,
cctl = txd->cctl;
bd.txd = txd;
- bd.pl08x = pl08x;
bd.srcbus.addr = txd->src_addr;
bd.dstbus.addr = txd->dst_addr;
+ bd.lli_bus = (pl08x->lli_buses & PL08X_AHB2) ? PL080_LLI_LM_AHB2 : 0;
/* Find maximum width of the source bus */
bd.srcbus.maxwidth =
@@ -622,25 +617,15 @@ static int pl08x_fill_llis_for_desc(struct pl08x_driver_data *pl08x,
/* Set up the bus widths to the maximum */
bd.srcbus.buswidth = bd.srcbus.maxwidth;
bd.dstbus.buswidth = bd.dstbus.maxwidth;
- dev_vdbg(&pl08x->adev->dev,
- "%s source bus is %d bytes wide, dest bus is %d bytes wide\n",
- __func__, bd.srcbus.buswidth, bd.dstbus.buswidth);
-
/*
* Bytes transferred == tsize * MIN(buswidths), not max(buswidths)
*/
max_bytes_per_lli = min(bd.srcbus.buswidth, bd.dstbus.buswidth) *
PL080_CONTROL_TRANSFER_SIZE_MASK;
- dev_vdbg(&pl08x->adev->dev,
- "%s max bytes per lli = %zu\n",
- __func__, max_bytes_per_lli);
/* We need to count this down to zero */
bd.remainder = txd->len;
- dev_vdbg(&pl08x->adev->dev,
- "%s remainder = %zu\n",
- __func__, bd.remainder);
/*
* Choose bus to align to
@@ -649,6 +634,16 @@ static int pl08x_fill_llis_for_desc(struct pl08x_driver_data *pl08x,
*/
pl08x_choose_master_bus(&bd, &mbus, &sbus, cctl);
+ dev_vdbg(&pl08x->adev->dev, "src=0x%08x%s/%u dst=0x%08x%s/%u len=%zu llimax=%zu\n",
+ bd.srcbus.addr, cctl & PL080_CONTROL_SRC_INCR ? "+" : "",
+ bd.srcbus.buswidth,
+ bd.dstbus.addr, cctl & PL080_CONTROL_DST_INCR ? "+" : "",
+ bd.dstbus.buswidth,
+ bd.remainder, max_bytes_per_lli);
+ dev_vdbg(&pl08x->adev->dev, "mbus=%s sbus=%s\n",
+ mbus == &bd.srcbus ? "src" : "dst",
+ sbus == &bd.srcbus ? "src" : "dst");
+
if (txd->len < mbus->buswidth) {
/* Less than a bus width available - send as single bytes */
while (bd.remainder) {
@@ -840,15 +835,14 @@ static int pl08x_fill_llis_for_desc(struct pl08x_driver_data *pl08x,
{
int i;
+ dev_vdbg(&pl08x->adev->dev,
+ "%-3s %-9s %-10s %-10s %-10s %s\n",
+ "lli", "", "csrc", "cdst", "clli", "cctl");
for (i = 0; i < num_llis; i++) {
dev_vdbg(&pl08x->adev->dev,
- "lli %d @%p: csrc=0x%08x, cdst=0x%08x, cctl=0x%08x, clli=0x%08x\n",
- i,
- &llis_va[i],
- llis_va[i].src,
- llis_va[i].dst,
- llis_va[i].cctl,
- llis_va[i].lli
+ "%3d @%p: 0x%08x 0x%08x 0x%08x 0x%08x\n",
+ i, &llis_va[i], llis_va[i].src,
+ llis_va[i].dst, llis_va[i].lli, llis_va[i].cctl
);
}
}
@@ -1054,64 +1048,105 @@ pl08x_dma_tx_status(struct dma_chan *chan,
/* PrimeCell DMA extension */
struct burst_table {
- int burstwords;
+ u32 burstwords;
u32 reg;
};
static const struct burst_table burst_sizes[] = {
{
.burstwords = 256,
- .reg = (PL080_BSIZE_256 << PL080_CONTROL_SB_SIZE_SHIFT) |
- (PL080_BSIZE_256 << PL080_CONTROL_DB_SIZE_SHIFT),
+ .reg = PL080_BSIZE_256,
},
{
.burstwords = 128,
- .reg = (PL080_BSIZE_128 << PL080_CONTROL_SB_SIZE_SHIFT) |
- (PL080_BSIZE_128 << PL080_CONTROL_DB_SIZE_SHIFT),
+ .reg = PL080_BSIZE_128,
},
{
.burstwords = 64,
- .reg = (PL080_BSIZE_64 << PL080_CONTROL_SB_SIZE_SHIFT) |
- (PL080_BSIZE_64 << PL080_CONTROL_DB_SIZE_SHIFT),
+ .reg = PL080_BSIZE_64,
},
{
.burstwords = 32,
- .reg = (PL080_BSIZE_32 << PL080_CONTROL_SB_SIZE_SHIFT) |
- (PL080_BSIZE_32 << PL080_CONTROL_DB_SIZE_SHIFT),
+ .reg = PL080_BSIZE_32,
},
{
.burstwords = 16,
- .reg = (PL080_BSIZE_16 << PL080_CONTROL_SB_SIZE_SHIFT) |
- (PL080_BSIZE_16 << PL080_CONTROL_DB_SIZE_SHIFT),
+ .reg = PL080_BSIZE_16,
},
{
.burstwords = 8,
- .reg = (PL080_BSIZE_8 << PL080_CONTROL_SB_SIZE_SHIFT) |
- (PL080_BSIZE_8 << PL080_CONTROL_DB_SIZE_SHIFT),
+ .reg = PL080_BSIZE_8,
},
{
.burstwords = 4,
- .reg = (PL080_BSIZE_4 << PL080_CONTROL_SB_SIZE_SHIFT) |
- (PL080_BSIZE_4 << PL080_CONTROL_DB_SIZE_SHIFT),
+ .reg = PL080_BSIZE_4,
},
{
- .burstwords = 1,
- .reg = (PL080_BSIZE_1 << PL080_CONTROL_SB_SIZE_SHIFT) |
- (PL080_BSIZE_1 << PL080_CONTROL_DB_SIZE_SHIFT),
+ .burstwords = 0,
+ .reg = PL080_BSIZE_1,
},
};
+/*
+ * Given the source and destination available bus masks, select which
+ * will be routed to each port. We try to have source and destination
+ * on separate ports, but always respect the allowable settings.
+ */
+static u32 pl08x_select_bus(u8 src, u8 dst)
+{
+ u32 cctl = 0;
+
+ if (!(dst & PL08X_AHB1) || ((dst & PL08X_AHB2) && (src & PL08X_AHB1)))
+ cctl |= PL080_CONTROL_DST_AHB2;
+ if (!(src & PL08X_AHB1) || ((src & PL08X_AHB2) && !(dst & PL08X_AHB2)))
+ cctl |= PL080_CONTROL_SRC_AHB2;
+
+ return cctl;
+}
+
+static u32 pl08x_cctl(u32 cctl)
+{
+ cctl &= ~(PL080_CONTROL_SRC_AHB2 | PL080_CONTROL_DST_AHB2 |
+ PL080_CONTROL_SRC_INCR | PL080_CONTROL_DST_INCR |
+ PL080_CONTROL_PROT_MASK);
+
+ /* Access the cell in privileged mode, non-bufferable, non-cacheable */
+ return cctl | PL080_CONTROL_PROT_SYS;
+}
+
+static u32 pl08x_width(enum dma_slave_buswidth width)
+{
+ switch (width) {
+ case DMA_SLAVE_BUSWIDTH_1_BYTE:
+ return PL080_WIDTH_8BIT;
+ case DMA_SLAVE_BUSWIDTH_2_BYTES:
+ return PL080_WIDTH_16BIT;
+ case DMA_SLAVE_BUSWIDTH_4_BYTES:
+ return PL080_WIDTH_32BIT;
+ default:
+ return ~0;
+ }
+}
+
+static u32 pl08x_burst(u32 maxburst)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(burst_sizes); i++)
+ if (burst_sizes[i].burstwords <= maxburst)
+ break;
+
+ return burst_sizes[i].reg;
+}
+
static int dma_set_runtime_config(struct dma_chan *chan,
struct dma_slave_config *config)
{
struct pl08x_dma_chan *plchan = to_pl08x_chan(chan);
struct pl08x_driver_data *pl08x = plchan->host;
- struct pl08x_channel_data *cd = plchan->cd;
enum dma_slave_buswidth addr_width;
- dma_addr_t addr;
- u32 maxburst;
+ u32 width, burst, maxburst;
u32 cctl = 0;
- int i;
if (!plchan->slave)
return -EINVAL;
@@ -1119,11 +1154,9 @@ static int dma_set_runtime_config(struct dma_chan *chan,
/* Transfer direction */
plchan->runtime_direction = config->direction;
if (config->direction == DMA_TO_DEVICE) {
- addr = config->dst_addr;
addr_width = config->dst_addr_width;
maxburst = config->dst_maxburst;
} else if (config->direction == DMA_FROM_DEVICE) {
- addr = config->src_addr;
addr_width = config->src_addr_width;
maxburst = config->src_maxburst;
} else {
@@ -1132,46 +1165,40 @@ static int dma_set_runtime_config(struct dma_chan *chan,
return -EINVAL;
}
- switch (addr_width) {
- case DMA_SLAVE_BUSWIDTH_1_BYTE:
- cctl |= (PL080_WIDTH_8BIT << PL080_CONTROL_SWIDTH_SHIFT) |
- (PL080_WIDTH_8BIT << PL080_CONTROL_DWIDTH_SHIFT);
- break;
- case DMA_SLAVE_BUSWIDTH_2_BYTES:
- cctl |= (PL080_WIDTH_16BIT << PL080_CONTROL_SWIDTH_SHIFT) |
- (PL080_WIDTH_16BIT << PL080_CONTROL_DWIDTH_SHIFT);
- break;
- case DMA_SLAVE_BUSWIDTH_4_BYTES:
- cctl |= (PL080_WIDTH_32BIT << PL080_CONTROL_SWIDTH_SHIFT) |
- (PL080_WIDTH_32BIT << PL080_CONTROL_DWIDTH_SHIFT);
- break;
- default:
+ width = pl08x_width(addr_width);
+ if (width == ~0) {
dev_err(&pl08x->adev->dev,
"bad runtime_config: alien address width\n");
return -EINVAL;
}
+ cctl |= width << PL080_CONTROL_SWIDTH_SHIFT;
+ cctl |= width << PL080_CONTROL_DWIDTH_SHIFT;
+
/*
- * Now decide on a maxburst:
* If this channel will only request single transfers, set this
* down to ONE element. Also select one element if no maxburst
* is specified.
*/
- if (plchan->cd->single || maxburst == 0) {
- cctl |= (PL080_BSIZE_1 << PL080_CONTROL_SB_SIZE_SHIFT) |
- (PL080_BSIZE_1 << PL080_CONTROL_DB_SIZE_SHIFT);
+ if (plchan->cd->single)
+ maxburst = 1;
+
+ burst = pl08x_burst(maxburst);
+ cctl |= burst << PL080_CONTROL_SB_SIZE_SHIFT;
+ cctl |= burst << PL080_CONTROL_DB_SIZE_SHIFT;
+
+ if (plchan->runtime_direction == DMA_FROM_DEVICE) {
+ plchan->src_addr = config->src_addr;
+ plchan->src_cctl = pl08x_cctl(cctl) | PL080_CONTROL_DST_INCR |
+ pl08x_select_bus(plchan->cd->periph_buses,
+ pl08x->mem_buses);
} else {
- for (i = 0; i < ARRAY_SIZE(burst_sizes); i++)
- if (burst_sizes[i].burstwords <= maxburst)
- break;
- cctl |= burst_sizes[i].reg;
+ plchan->dst_addr = config->dst_addr;
+ plchan->dst_cctl = pl08x_cctl(cctl) | PL080_CONTROL_SRC_INCR |
+ pl08x_select_bus(pl08x->mem_buses,
+ plchan->cd->periph_buses);
}
- plchan->runtime_addr = addr;
-
- /* Modify the default channel data to fit PrimeCell request */
- cd->cctl = cctl;
-
dev_dbg(&pl08x->adev->dev,
"configured channel %s (%s) for %s, data width %d, "
"maxburst %d words, LE, CCTL=0x%08x\n",
@@ -1270,23 +1297,6 @@ static int pl08x_prep_channel_resources(struct pl08x_dma_chan *plchan,
return 0;
}
-/*
- * Given the source and destination available bus masks, select which
- * will be routed to each port. We try to have source and destination
- * on separate ports, but always respect the allowable settings.
- */
-static u32 pl08x_select_bus(struct pl08x_driver_data *pl08x, u8 src, u8 dst)
-{
- u32 cctl = 0;
-
- if (!(dst & PL08X_AHB1) || ((dst & PL08X_AHB2) && (src & PL08X_AHB1)))
- cctl |= PL080_CONTROL_DST_AHB2;
- if (!(src & PL08X_AHB1) || ((src & PL08X_AHB2) && !(dst & PL08X_AHB2)))
- cctl |= PL080_CONTROL_SRC_AHB2;
-
- return cctl;
-}
-
static struct pl08x_txd *pl08x_get_txd(struct pl08x_dma_chan *plchan,
unsigned long flags)
{
@@ -1338,8 +1348,8 @@ static struct dma_async_tx_descriptor *pl08x_prep_dma_memcpy(
txd->cctl |= PL080_CONTROL_SRC_INCR | PL080_CONTROL_DST_INCR;
if (pl08x->vd->dualmaster)
- txd->cctl |= pl08x_select_bus(pl08x,
- pl08x->mem_buses, pl08x->mem_buses);
+ txd->cctl |= pl08x_select_bus(pl08x->mem_buses,
+ pl08x->mem_buses);
ret = pl08x_prep_channel_resources(plchan, txd);
if (ret)
@@ -1356,7 +1366,6 @@ static struct dma_async_tx_descriptor *pl08x_prep_slave_sg(
struct pl08x_dma_chan *plchan = to_pl08x_chan(chan);
struct pl08x_driver_data *pl08x = plchan->host;
struct pl08x_txd *txd;
- u8 src_buses, dst_buses;
int ret;
/*
@@ -1390,42 +1399,22 @@ static struct dma_async_tx_descriptor *pl08x_prep_slave_sg(
txd->direction = direction;
txd->len = sgl->length;
- txd->cctl = plchan->cd->cctl &
- ~(PL080_CONTROL_SRC_AHB2 | PL080_CONTROL_DST_AHB2 |
- PL080_CONTROL_SRC_INCR | PL080_CONTROL_DST_INCR |
- PL080_CONTROL_PROT_MASK);
-
- /* Access the cell in privileged mode, non-bufferable, non-cacheable */
- txd->cctl |= PL080_CONTROL_PROT_SYS;
-
if (direction == DMA_TO_DEVICE) {
txd->ccfg |= PL080_FLOW_MEM2PER << PL080_CONFIG_FLOW_CONTROL_SHIFT;
- txd->cctl |= PL080_CONTROL_SRC_INCR;
+ txd->cctl = plchan->dst_cctl;
txd->src_addr = sgl->dma_address;
- if (plchan->runtime_addr)
- txd->dst_addr = plchan->runtime_addr;
- else
- txd->dst_addr = plchan->cd->addr;
- src_buses = pl08x->mem_buses;
- dst_buses = plchan->cd->periph_buses;
+ txd->dst_addr = plchan->dst_addr;
} else if (direction == DMA_FROM_DEVICE) {
txd->ccfg |= PL080_FLOW_PER2MEM << PL080_CONFIG_FLOW_CONTROL_SHIFT;
- txd->cctl |= PL080_CONTROL_DST_INCR;
- if (plchan->runtime_addr)
- txd->src_addr = plchan->runtime_addr;
- else
- txd->src_addr = plchan->cd->addr;
+ txd->cctl = plchan->src_cctl;
+ txd->src_addr = plchan->src_addr;
txd->dst_addr = sgl->dma_address;
- src_buses = plchan->cd->periph_buses;
- dst_buses = pl08x->mem_buses;
} else {
dev_err(&pl08x->adev->dev,
"%s direction unsupported\n", __func__);
return NULL;
}
- txd->cctl |= pl08x_select_bus(pl08x, src_buses, dst_buses);
-
ret = pl08x_prep_channel_resources(plchan, txd);
if (ret)
return NULL;
@@ -1676,6 +1665,20 @@ static irqreturn_t pl08x_irq(int irq, void *dev)
return mask ? IRQ_HANDLED : IRQ_NONE;
}
+static void pl08x_dma_slave_init(struct pl08x_dma_chan *chan)
+{
+ u32 cctl = pl08x_cctl(chan->cd->cctl);
+
+ chan->slave = true;
+ chan->name = chan->cd->bus_id;
+ chan->src_addr = chan->cd->addr;
+ chan->dst_addr = chan->cd->addr;
+ chan->src_cctl = cctl | PL080_CONTROL_DST_INCR |
+ pl08x_select_bus(chan->cd->periph_buses, chan->host->mem_buses);
+ chan->dst_cctl = cctl | PL080_CONTROL_SRC_INCR |
+ pl08x_select_bus(chan->host->mem_buses, chan->cd->periph_buses);
+}
+
/*
* Initialise the DMAC memcpy/slave channels.
* Make a local wrapper to hold required data
@@ -1707,9 +1710,8 @@ static int pl08x_dma_init_virtual_channels(struct pl08x_driver_data *pl08x,
chan->state = PL08X_CHAN_IDLE;
if (slave) {
- chan->slave = true;
- chan->name = pl08x->pd->slave_channels[i].bus_id;
chan->cd = &pl08x->pd->slave_channels[i];
+ pl08x_dma_slave_init(chan);
} else {
chan->cd = &pl08x->pd->memcpy_channel;
chan->name = kasprintf(GFP_KERNEL, "memcpy%d", i);
diff --git a/drivers/dma/at_hdmac.c b/drivers/dma/at_hdmac.c
index 36144f88d71..6a483eac7b3 100644
--- a/drivers/dma/at_hdmac.c
+++ b/drivers/dma/at_hdmac.c
@@ -1216,7 +1216,7 @@ static int __init at_dma_probe(struct platform_device *pdev)
atdma->dma_common.cap_mask = pdata->cap_mask;
atdma->all_chan_mask = (1 << pdata->nr_channels) - 1;
- size = io->end - io->start + 1;
+ size = resource_size(io);
if (!request_mem_region(io->start, size, pdev->dev.driver->name)) {
err = -EBUSY;
goto err_kfree;
@@ -1362,7 +1362,7 @@ static int __exit at_dma_remove(struct platform_device *pdev)
atdma->regs = NULL;
io = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- release_mem_region(io->start, io->end - io->start + 1);
+ release_mem_region(io->start, resource_size(io));
kfree(atdma);
diff --git a/drivers/dma/coh901318.c b/drivers/dma/coh901318.c
index a92d95eac86..4234f416ef1 100644
--- a/drivers/dma/coh901318.c
+++ b/drivers/dma/coh901318.c
@@ -41,6 +41,8 @@ struct coh901318_desc {
struct coh901318_lli *lli;
enum dma_data_direction dir;
unsigned long flags;
+ u32 head_config;
+ u32 head_ctrl;
};
struct coh901318_base {
@@ -661,6 +663,9 @@ static struct coh901318_desc *coh901318_queue_start(struct coh901318_chan *cohc)
coh901318_desc_submit(cohc, cohd);
+ /* Program the transaction head */
+ coh901318_set_conf(cohc, cohd->head_config);
+ coh901318_set_ctrl(cohc, cohd->head_ctrl);
coh901318_prep_linked_list(cohc, cohd->lli);
/* start dma job on this channel */
@@ -1091,8 +1096,6 @@ coh901318_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
} else
goto err_direction;
- coh901318_set_conf(cohc, config);
-
/* The dma only supports transmitting packages up to
* MAX_DMA_PACKET_SIZE. Calculate to total number of
* dma elemts required to send the entire sg list
@@ -1129,16 +1132,18 @@ coh901318_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
if (ret)
goto err_lli_fill;
- /*
- * Set the default ctrl for the channel to the one from the lli,
- * things may have changed due to odd buffer alignment etc.
- */
- coh901318_set_ctrl(cohc, lli->control);
COH_DBG(coh901318_list_print(cohc, lli));
/* Pick a descriptor to handle this transfer */
cohd = coh901318_desc_get(cohc);
+ cohd->head_config = config;
+ /*
+ * Set the default head ctrl for the channel to the one from the
+ * lli, things may have changed due to odd buffer alignment
+ * etc.
+ */
+ cohd->head_ctrl = lli->control;
cohd->dir = direction;
cohd->flags = flags;
cohd->desc.tx_submit = coh901318_tx_submit;
diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c
index 48694c34d96..26374b2a55a 100644
--- a/drivers/dma/dmaengine.c
+++ b/drivers/dma/dmaengine.c
@@ -510,8 +510,8 @@ struct dma_chan *__dma_request_channel(dma_cap_mask_t *mask, dma_filter_fn fn, v
dma_chan_name(chan));
list_del_rcu(&device->global_node);
} else if (err)
- pr_err("dmaengine: failed to get %s: (%d)\n",
- dma_chan_name(chan), err);
+ pr_debug("dmaengine: failed to get %s: (%d)\n",
+ dma_chan_name(chan), err);
else
break;
if (--device->privatecnt == 0)
diff --git a/drivers/dma/ep93xx_dma.c b/drivers/dma/ep93xx_dma.c
index 0766c1e53b1..5d7a49bd7c2 100644
--- a/drivers/dma/ep93xx_dma.c
+++ b/drivers/dma/ep93xx_dma.c
@@ -902,7 +902,7 @@ static void ep93xx_dma_free_chan_resources(struct dma_chan *chan)
*
* Returns a valid DMA descriptor or %NULL in case of failure.
*/
-struct dma_async_tx_descriptor *
+static struct dma_async_tx_descriptor *
ep93xx_dma_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest,
dma_addr_t src, size_t len, unsigned long flags)
{
diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index 1eb60ded2f0..7bd7e98548c 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -1305,8 +1305,10 @@ static int __init sdma_probe(struct platform_device *pdev)
goto err_request_irq;
sdma->script_addrs = kzalloc(sizeof(*sdma->script_addrs), GFP_KERNEL);
- if (!sdma->script_addrs)
+ if (!sdma->script_addrs) {
+ ret = -ENOMEM;
goto err_alloc;
+ }
if (of_id)
pdev->id_entry = of_id->data;
diff --git a/drivers/dma/intel_mid_dma.c b/drivers/dma/intel_mid_dma.c
index f653517ef74..8a3fdd87db9 100644
--- a/drivers/dma/intel_mid_dma.c
+++ b/drivers/dma/intel_mid_dma.c
@@ -1351,7 +1351,6 @@ int dma_suspend(struct pci_dev *pci, pm_message_t state)
return -EAGAIN;
}
device->state = SUSPENDED;
- pci_set_drvdata(pci, device);
pci_save_state(pci);
pci_disable_device(pci);
pci_set_power_state(pci, PCI_D3hot);
@@ -1380,7 +1379,6 @@ int dma_resume(struct pci_dev *pci)
}
device->state = RUNNING;
iowrite32(REG_BIT0, device->dma_base + DMA_CFG);
- pci_set_drvdata(pci, device);
return 0;
}
diff --git a/drivers/dma/ipu/ipu_idmac.c b/drivers/dma/ipu/ipu_idmac.c
index fd7d2b308cf..6815905a772 100644
--- a/drivers/dma/ipu/ipu_idmac.c
+++ b/drivers/dma/ipu/ipu_idmac.c
@@ -1706,16 +1706,14 @@ static int __init ipu_probe(struct platform_device *pdev)
ipu_data.irq_fn, ipu_data.irq_err, ipu_data.irq_base);
/* Remap IPU common registers */
- ipu_data.reg_ipu = ioremap(mem_ipu->start,
- mem_ipu->end - mem_ipu->start + 1);
+ ipu_data.reg_ipu = ioremap(mem_ipu->start, resource_size(mem_ipu));
if (!ipu_data.reg_ipu) {
ret = -ENOMEM;
goto err_ioremap_ipu;
}
/* Remap Image Converter and Image DMA Controller registers */
- ipu_data.reg_ic = ioremap(mem_ic->start,
- mem_ic->end - mem_ic->start + 1);
+ ipu_data.reg_ic = ioremap(mem_ic->start, resource_size(mem_ic));
if (!ipu_data.reg_ic) {
ret = -ENOMEM;
goto err_ioremap_ic;
diff --git a/drivers/dma/mv_xor.c b/drivers/dma/mv_xor.c
index 06f9f27dbe7..9a353c2216d 100644
--- a/drivers/dma/mv_xor.c
+++ b/drivers/dma/mv_xor.c
@@ -1304,7 +1304,8 @@ static int mv_xor_shared_probe(struct platform_device *pdev)
if (!res)
return -ENODEV;
- msp->xor_base = devm_ioremap(&pdev->dev, res->start, resource_size(res));
+ msp->xor_base = devm_ioremap(&pdev->dev, res->start,
+ resource_size(res));
if (!msp->xor_base)
return -EBUSY;
diff --git a/drivers/dma/mxs-dma.c b/drivers/dma/mxs-dma.c
index 88aad4f5400..be641cbd36f 100644
--- a/drivers/dma/mxs-dma.c
+++ b/drivers/dma/mxs-dma.c
@@ -327,10 +327,12 @@ static int mxs_dma_alloc_chan_resources(struct dma_chan *chan)
memset(mxs_chan->ccw, 0, PAGE_SIZE);
- ret = request_irq(mxs_chan->chan_irq, mxs_dma_int_handler,
- 0, "mxs-dma", mxs_dma);
- if (ret)
- goto err_irq;
+ if (mxs_chan->chan_irq != NO_IRQ) {
+ ret = request_irq(mxs_chan->chan_irq, mxs_dma_int_handler,
+ 0, "mxs-dma", mxs_dma);
+ if (ret)
+ goto err_irq;
+ }
ret = clk_enable(mxs_dma->clk);
if (ret)
@@ -535,6 +537,7 @@ static int mxs_dma_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
switch (cmd) {
case DMA_TERMINATE_ALL:
mxs_dma_disable_chan(mxs_chan);
+ mxs_dma_reset_chan(mxs_chan);
break;
case DMA_PAUSE:
mxs_dma_pause_chan(mxs_chan);
@@ -707,6 +710,8 @@ static struct platform_device_id mxs_dma_type[] = {
}, {
.name = "mxs-dma-apbx",
.driver_data = MXS_DMA_APBX,
+ }, {
+ /* end of list */
}
};
diff --git a/drivers/dma/pch_dma.c b/drivers/dma/pch_dma.c
index ff5b38f9d45..1ac8d4b580b 100644
--- a/drivers/dma/pch_dma.c
+++ b/drivers/dma/pch_dma.c
@@ -45,7 +45,8 @@
#define DMA_STATUS_MASK_BITS 0x3
#define DMA_STATUS_SHIFT_BITS 16
#define DMA_STATUS_IRQ(x) (0x1 << (x))
-#define DMA_STATUS_ERR(x) (0x1 << ((x) + 8))
+#define DMA_STATUS0_ERR(x) (0x1 << ((x) + 8))
+#define DMA_STATUS2_ERR(x) (0x1 << (x))
#define DMA_DESC_WIDTH_SHIFT_BITS 12
#define DMA_DESC_WIDTH_1_BYTE (0x3 << DMA_DESC_WIDTH_SHIFT_BITS)
@@ -61,6 +62,9 @@
#define MAX_CHAN_NR 8
+#define DMA_MASK_CTL0_MODE 0x33333333
+#define DMA_MASK_CTL2_MODE 0x00003333
+
static unsigned int init_nr_desc_per_channel = 64;
module_param(init_nr_desc_per_channel, uint, 0644);
MODULE_PARM_DESC(init_nr_desc_per_channel,
@@ -133,6 +137,7 @@ struct pch_dma {
#define PCH_DMA_CTL3 0x0C
#define PCH_DMA_STS0 0x10
#define PCH_DMA_STS1 0x14
+#define PCH_DMA_STS2 0x18
#define dma_readl(pd, name) \
readl((pd)->membase + PCH_DMA_##name)
@@ -183,13 +188,19 @@ static void pdc_enable_irq(struct dma_chan *chan, int enable)
{
struct pch_dma *pd = to_pd(chan->device);
u32 val;
+ int pos;
+
+ if (chan->chan_id < 8)
+ pos = chan->chan_id;
+ else
+ pos = chan->chan_id + 8;
val = dma_readl(pd, CTL2);
if (enable)
- val |= 0x1 << chan->chan_id;
+ val |= 0x1 << pos;
else
- val &= ~(0x1 << chan->chan_id);
+ val &= ~(0x1 << pos);
dma_writel(pd, CTL2, val);
@@ -202,10 +213,17 @@ static void pdc_set_dir(struct dma_chan *chan)
struct pch_dma_chan *pd_chan = to_pd_chan(chan);
struct pch_dma *pd = to_pd(chan->device);
u32 val;
+ u32 mask_mode;
+ u32 mask_ctl;
if (chan->chan_id < 8) {
val = dma_readl(pd, CTL0);
+ mask_mode = DMA_CTL0_MODE_MASK_BITS <<
+ (DMA_CTL0_BITS_PER_CH * chan->chan_id);
+ mask_ctl = DMA_MASK_CTL0_MODE & ~(DMA_CTL0_MODE_MASK_BITS <<
+ (DMA_CTL0_BITS_PER_CH * chan->chan_id));
+ val &= mask_mode;
if (pd_chan->dir == DMA_TO_DEVICE)
val |= 0x1 << (DMA_CTL0_BITS_PER_CH * chan->chan_id +
DMA_CTL0_DIR_SHIFT_BITS);
@@ -213,18 +231,24 @@ static void pdc_set_dir(struct dma_chan *chan)
val &= ~(0x1 << (DMA_CTL0_BITS_PER_CH * chan->chan_id +
DMA_CTL0_DIR_SHIFT_BITS));
+ val |= mask_ctl;
dma_writel(pd, CTL0, val);
} else {
int ch = chan->chan_id - 8; /* ch8-->0 ch9-->1 ... ch11->3 */
val = dma_readl(pd, CTL3);
+ mask_mode = DMA_CTL0_MODE_MASK_BITS <<
+ (DMA_CTL0_BITS_PER_CH * ch);
+ mask_ctl = DMA_MASK_CTL2_MODE & ~(DMA_CTL0_MODE_MASK_BITS <<
+ (DMA_CTL0_BITS_PER_CH * ch));
+ val &= mask_mode;
if (pd_chan->dir == DMA_TO_DEVICE)
val |= 0x1 << (DMA_CTL0_BITS_PER_CH * ch +
DMA_CTL0_DIR_SHIFT_BITS);
else
val &= ~(0x1 << (DMA_CTL0_BITS_PER_CH * ch +
DMA_CTL0_DIR_SHIFT_BITS));
-
+ val |= mask_ctl;
dma_writel(pd, CTL3, val);
}
@@ -236,33 +260,37 @@ static void pdc_set_mode(struct dma_chan *chan, u32 mode)
{
struct pch_dma *pd = to_pd(chan->device);
u32 val;
+ u32 mask_ctl;
+ u32 mask_dir;
if (chan->chan_id < 8) {
+ mask_ctl = DMA_MASK_CTL0_MODE & ~(DMA_CTL0_MODE_MASK_BITS <<
+ (DMA_CTL0_BITS_PER_CH * chan->chan_id));
+ mask_dir = 1 << (DMA_CTL0_BITS_PER_CH * chan->chan_id +\
+ DMA_CTL0_DIR_SHIFT_BITS);
val = dma_readl(pd, CTL0);
-
- val &= ~(DMA_CTL0_MODE_MASK_BITS <<
- (DMA_CTL0_BITS_PER_CH * chan->chan_id));
+ val &= mask_dir;
val |= mode << (DMA_CTL0_BITS_PER_CH * chan->chan_id);
-
+ val |= mask_ctl;
dma_writel(pd, CTL0, val);
} else {
int ch = chan->chan_id - 8; /* ch8-->0 ch9-->1 ... ch11->3 */
-
+ mask_ctl = DMA_MASK_CTL2_MODE & ~(DMA_CTL0_MODE_MASK_BITS <<
+ (DMA_CTL0_BITS_PER_CH * ch));
+ mask_dir = 1 << (DMA_CTL0_BITS_PER_CH * ch +\
+ DMA_CTL0_DIR_SHIFT_BITS);
val = dma_readl(pd, CTL3);
-
- val &= ~(DMA_CTL0_MODE_MASK_BITS <<
- (DMA_CTL0_BITS_PER_CH * ch));
+ val &= mask_dir;
val |= mode << (DMA_CTL0_BITS_PER_CH * ch);
-
+ val |= mask_ctl;
dma_writel(pd, CTL3, val);
-
}
dev_dbg(chan2dev(chan), "pdc_set_mode: chan %d -> %x\n",
chan->chan_id, val);
}
-static u32 pdc_get_status(struct pch_dma_chan *pd_chan)
+static u32 pdc_get_status0(struct pch_dma_chan *pd_chan)
{
struct pch_dma *pd = to_pd(pd_chan->chan.device);
u32 val;
@@ -272,9 +300,27 @@ static u32 pdc_get_status(struct pch_dma_chan *pd_chan)
DMA_STATUS_BITS_PER_CH * pd_chan->chan.chan_id));
}
+static u32 pdc_get_status2(struct pch_dma_chan *pd_chan)
+{
+ struct pch_dma *pd = to_pd(pd_chan->chan.device);
+ u32 val;
+
+ val = dma_readl(pd, STS2);
+ return DMA_STATUS_MASK_BITS & (val >> (DMA_STATUS_SHIFT_BITS +
+ DMA_STATUS_BITS_PER_CH * (pd_chan->chan.chan_id - 8)));
+}
+
static bool pdc_is_idle(struct pch_dma_chan *pd_chan)
{
- if (pdc_get_status(pd_chan) == DMA_STATUS_IDLE)
+ u32 sts;
+
+ if (pd_chan->chan.chan_id < 8)
+ sts = pdc_get_status0(pd_chan);
+ else
+ sts = pdc_get_status2(pd_chan);
+
+
+ if (sts == DMA_STATUS_IDLE)
return true;
else
return false;
@@ -495,11 +541,11 @@ static int pd_alloc_chan_resources(struct dma_chan *chan)
list_add_tail(&desc->desc_node, &tmp_list);
}
- spin_lock_bh(&pd_chan->lock);
+ spin_lock_irq(&pd_chan->lock);
list_splice(&tmp_list, &pd_chan->free_list);
pd_chan->descs_allocated = i;
pd_chan->completed_cookie = chan->cookie = 1;
- spin_unlock_bh(&pd_chan->lock);
+ spin_unlock_irq(&pd_chan->lock);
pdc_enable_irq(chan, 1);
@@ -517,10 +563,10 @@ static void pd_free_chan_resources(struct dma_chan *chan)
BUG_ON(!list_empty(&pd_chan->active_list));
BUG_ON(!list_empty(&pd_chan->queue));
- spin_lock_bh(&pd_chan->lock);
+ spin_lock_irq(&pd_chan->lock);
list_splice_init(&pd_chan->free_list, &tmp_list);
pd_chan->descs_allocated = 0;
- spin_unlock_bh(&pd_chan->lock);
+ spin_unlock_irq(&pd_chan->lock);
list_for_each_entry_safe(desc, _d, &tmp_list, desc_node)
pci_pool_free(pd->pool, desc, desc->txd.phys);
@@ -536,10 +582,10 @@ static enum dma_status pd_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
dma_cookie_t last_completed;
int ret;
- spin_lock_bh(&pd_chan->lock);
+ spin_lock_irq(&pd_chan->lock);
last_completed = pd_chan->completed_cookie;
last_used = chan->cookie;
- spin_unlock_bh(&pd_chan->lock);
+ spin_unlock_irq(&pd_chan->lock);
ret = dma_async_is_complete(cookie, last_completed, last_used);
@@ -654,7 +700,7 @@ static int pd_device_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
if (cmd != DMA_TERMINATE_ALL)
return -ENXIO;
- spin_lock_bh(&pd_chan->lock);
+ spin_lock_irq(&pd_chan->lock);
pdc_set_mode(&pd_chan->chan, DMA_CTL0_DISABLE);
@@ -664,7 +710,7 @@ static int pd_device_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
list_for_each_entry_safe(desc, _d, &list, desc_node)
pdc_chain_complete(pd_chan, desc);
- spin_unlock_bh(&pd_chan->lock);
+ spin_unlock_irq(&pd_chan->lock);
return 0;
}
@@ -693,30 +739,45 @@ static irqreturn_t pd_irq(int irq, void *devid)
struct pch_dma *pd = (struct pch_dma *)devid;
struct pch_dma_chan *pd_chan;
u32 sts0;
+ u32 sts2;
int i;
- int ret = IRQ_NONE;
+ int ret0 = IRQ_NONE;
+ int ret2 = IRQ_NONE;
sts0 = dma_readl(pd, STS0);
+ sts2 = dma_readl(pd, STS2);
dev_dbg(pd->dma.dev, "pd_irq sts0: %x\n", sts0);
for (i = 0; i < pd->dma.chancnt; i++) {
pd_chan = &pd->channels[i];
- if (sts0 & DMA_STATUS_IRQ(i)) {
- if (sts0 & DMA_STATUS_ERR(i))
- set_bit(0, &pd_chan->err_status);
+ if (i < 8) {
+ if (sts0 & DMA_STATUS_IRQ(i)) {
+ if (sts0 & DMA_STATUS0_ERR(i))
+ set_bit(0, &pd_chan->err_status);
- tasklet_schedule(&pd_chan->tasklet);
- ret = IRQ_HANDLED;
- }
+ tasklet_schedule(&pd_chan->tasklet);
+ ret0 = IRQ_HANDLED;
+ }
+ } else {
+ if (sts2 & DMA_STATUS_IRQ(i - 8)) {
+ if (sts2 & DMA_STATUS2_ERR(i))
+ set_bit(0, &pd_chan->err_status);
+ tasklet_schedule(&pd_chan->tasklet);
+ ret2 = IRQ_HANDLED;
+ }
+ }
}
/* clear interrupt bits in status register */
- dma_writel(pd, STS0, sts0);
+ if (ret0)
+ dma_writel(pd, STS0, sts0);
+ if (ret2)
+ dma_writel(pd, STS2, sts2);
- return ret;
+ return ret0 | ret2;
}
#ifdef CONFIG_PM
diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
index 6abe1ec1f2c..00eee59e8b3 100644
--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c
@@ -82,7 +82,7 @@ struct dma_pl330_dmac {
spinlock_t pool_lock;
/* Peripheral channels connected to this DMAC */
- struct dma_pl330_chan peripherals[0]; /* keep at end */
+ struct dma_pl330_chan *peripherals; /* keep at end */
};
struct dma_pl330_desc {
@@ -451,8 +451,13 @@ static struct dma_pl330_desc *pl330_get_desc(struct dma_pl330_chan *pch)
desc->txd.cookie = 0;
async_tx_ack(&desc->txd);
- desc->req.rqtype = peri->rqtype;
- desc->req.peri = peri->peri_id;
+ if (peri) {
+ desc->req.rqtype = peri->rqtype;
+ desc->req.peri = peri->peri_id;
+ } else {
+ desc->req.rqtype = MEMTOMEM;
+ desc->req.peri = 0;
+ }
dma_async_tx_descriptor_init(&desc->txd, &pch->chan);
@@ -529,10 +534,10 @@ pl330_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dst,
struct pl330_info *pi;
int burst;
- if (unlikely(!pch || !len || !peri))
+ if (unlikely(!pch || !len))
return NULL;
- if (peri->rqtype != MEMTOMEM)
+ if (peri && peri->rqtype != MEMTOMEM)
return NULL;
pi = &pch->dmac->pif;
@@ -577,7 +582,7 @@ pl330_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
int i, burst_size;
dma_addr_t addr;
- if (unlikely(!pch || !sgl || !sg_len))
+ if (unlikely(!pch || !sgl || !sg_len || !peri))
return NULL;
/* Make sure the direction is consistent */
@@ -666,17 +671,12 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id)
struct dma_device *pd;
struct resource *res;
int i, ret, irq;
+ int num_chan;
pdat = adev->dev.platform_data;
- if (!pdat || !pdat->nr_valid_peri) {
- dev_err(&adev->dev, "platform data missing\n");
- return -ENODEV;
- }
-
/* Allocate a new DMAC and its Channels */
- pdmac = kzalloc(pdat->nr_valid_peri * sizeof(*pch)
- + sizeof(*pdmac), GFP_KERNEL);
+ pdmac = kzalloc(sizeof(*pdmac), GFP_KERNEL);
if (!pdmac) {
dev_err(&adev->dev, "unable to allocate mem\n");
return -ENOMEM;
@@ -685,7 +685,7 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id)
pi = &pdmac->pif;
pi->dev = &adev->dev;
pi->pl330_data = NULL;
- pi->mcbufsz = pdat->mcbuf_sz;
+ pi->mcbufsz = pdat ? pdat->mcbuf_sz : 0;
res = &adev->res;
request_mem_region(res->start, resource_size(res), "dma-pl330");
@@ -717,27 +717,35 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id)
INIT_LIST_HEAD(&pd->channels);
/* Initialize channel parameters */
- for (i = 0; i < pdat->nr_valid_peri; i++) {
- struct dma_pl330_peri *peri = &pdat->peri[i];
- pch = &pdmac->peripherals[i];
+ num_chan = max(pdat ? pdat->nr_valid_peri : 0, (u8)pi->pcfg.num_chan);
+ pdmac->peripherals = kzalloc(num_chan * sizeof(*pch), GFP_KERNEL);
- switch (peri->rqtype) {
- case MEMTOMEM:
+ 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);
+ break;
+ default:
+ dev_err(&adev->dev, "DEVTODEV Not Supported\n");
+ continue;
+ }
+ pch->chan.private = peri;
+ } else {
dma_cap_set(DMA_MEMCPY, pd->cap_mask);
- break;
- case MEMTODEV:
- case DEVTOMEM:
- dma_cap_set(DMA_SLAVE, pd->cap_mask);
- break;
- default:
- dev_err(&adev->dev, "DEVTODEV Not Supported\n");
- continue;
+ pch->chan.private = NULL;
}
INIT_LIST_HEAD(&pch->work_list);
spin_lock_init(&pch->lock);
pch->pl330_chid = NULL;
- pch->chan.private = peri;
pch->chan.device = pd;
pch->chan.chan_id = i;
pch->dmac = pdmac;
diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index 29d1addbe0c..cd3a7c726bf 100644
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -14,6 +14,7 @@
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/err.h>
+#include <linux/amba/bus.h>
#include <plat/ste_dma40.h>
@@ -45,9 +46,6 @@
#define D40_ALLOC_PHY (1 << 30)
#define D40_ALLOC_LOG_FREE 0
-/* Hardware designer of the block */
-#define D40_HW_DESIGNER 0x8
-
/**
* enum 40_command - The different commands and/or statuses.
*
@@ -186,6 +184,8 @@ struct d40_base;
* @log_def: Default logical channel settings.
* @lcla: Space for one dst src pair for logical channel transfers.
* @lcpa: Pointer to dst and src lcpa settings.
+ * @runtime_addr: runtime configured address.
+ * @runtime_direction: runtime configured direction.
*
* This struct can either "be" a logical or a physical channel.
*/
@@ -200,6 +200,7 @@ struct d40_chan {
struct dma_chan chan;
struct tasklet_struct tasklet;
struct list_head client;
+ struct list_head pending_queue;
struct list_head active;
struct list_head queue;
struct stedma40_chan_cfg dma_cfg;
@@ -645,7 +646,20 @@ static struct d40_desc *d40_first_active_get(struct d40_chan *d40c)
static void d40_desc_queue(struct d40_chan *d40c, struct d40_desc *desc)
{
- list_add_tail(&desc->node, &d40c->queue);
+ list_add_tail(&desc->node, &d40c->pending_queue);
+}
+
+static struct d40_desc *d40_first_pending(struct d40_chan *d40c)
+{
+ struct d40_desc *d;
+
+ if (list_empty(&d40c->pending_queue))
+ return NULL;
+
+ d = list_first_entry(&d40c->pending_queue,
+ struct d40_desc,
+ node);
+ return d;
}
static struct d40_desc *d40_first_queued(struct d40_chan *d40c)
@@ -802,6 +816,11 @@ static void d40_term_all(struct d40_chan *d40c)
d40_desc_free(d40c, d40d);
}
+ /* Release pending descriptors */
+ while ((d40d = d40_first_pending(d40c))) {
+ d40_desc_remove(d40d);
+ d40_desc_free(d40c, d40d);
+ }
d40c->pending_tx = 0;
d40c->busy = false;
@@ -2092,7 +2111,7 @@ dma40_prep_dma_cyclic(struct dma_chan *chan, dma_addr_t dma_addr,
struct scatterlist *sg;
int i;
- sg = kcalloc(periods + 1, sizeof(struct scatterlist), GFP_KERNEL);
+ sg = kcalloc(periods + 1, sizeof(struct scatterlist), GFP_NOWAIT);
for (i = 0; i < periods; i++) {
sg_dma_address(&sg[i]) = dma_addr;
sg_dma_len(&sg[i]) = period_len;
@@ -2152,24 +2171,87 @@ static void d40_issue_pending(struct dma_chan *chan)
spin_lock_irqsave(&d40c->lock, flags);
- /* Busy means that pending jobs are already being processed */
+ list_splice_tail_init(&d40c->pending_queue, &d40c->queue);
+
+ /* Busy means that queued jobs are already being processed */
if (!d40c->busy)
(void) d40_queue_start(d40c);
spin_unlock_irqrestore(&d40c->lock, flags);
}
+static int
+dma40_config_to_halfchannel(struct d40_chan *d40c,
+ struct stedma40_half_channel_info *info,
+ enum dma_slave_buswidth width,
+ u32 maxburst)
+{
+ enum stedma40_periph_data_width addr_width;
+ int psize;
+
+ switch (width) {
+ case DMA_SLAVE_BUSWIDTH_1_BYTE:
+ addr_width = STEDMA40_BYTE_WIDTH;
+ break;
+ case DMA_SLAVE_BUSWIDTH_2_BYTES:
+ addr_width = STEDMA40_HALFWORD_WIDTH;
+ break;
+ case DMA_SLAVE_BUSWIDTH_4_BYTES:
+ addr_width = STEDMA40_WORD_WIDTH;
+ break;
+ case DMA_SLAVE_BUSWIDTH_8_BYTES:
+ addr_width = STEDMA40_DOUBLEWORD_WIDTH;
+ break;
+ default:
+ dev_err(d40c->base->dev,
+ "illegal peripheral address width "
+ "requested (%d)\n",
+ width);
+ return -EINVAL;
+ }
+
+ if (chan_is_logical(d40c)) {
+ if (maxburst >= 16)
+ psize = STEDMA40_PSIZE_LOG_16;
+ else if (maxburst >= 8)
+ psize = STEDMA40_PSIZE_LOG_8;
+ else if (maxburst >= 4)
+ psize = STEDMA40_PSIZE_LOG_4;
+ else
+ psize = STEDMA40_PSIZE_LOG_1;
+ } else {
+ if (maxburst >= 16)
+ psize = STEDMA40_PSIZE_PHY_16;
+ else if (maxburst >= 8)
+ psize = STEDMA40_PSIZE_PHY_8;
+ else if (maxburst >= 4)
+ psize = STEDMA40_PSIZE_PHY_4;
+ else
+ psize = STEDMA40_PSIZE_PHY_1;
+ }
+
+ info->data_width = addr_width;
+ info->psize = psize;
+ info->flow_ctrl = STEDMA40_NO_FLOW_CTRL;
+
+ return 0;
+}
+
/* Runtime reconfiguration extension */
-static void d40_set_runtime_config(struct dma_chan *chan,
- struct dma_slave_config *config)
+static int d40_set_runtime_config(struct dma_chan *chan,
+ struct dma_slave_config *config)
{
struct d40_chan *d40c = container_of(chan, struct d40_chan, chan);
struct stedma40_chan_cfg *cfg = &d40c->dma_cfg;
- enum dma_slave_buswidth config_addr_width;
+ enum dma_slave_buswidth src_addr_width, dst_addr_width;
dma_addr_t config_addr;
- u32 config_maxburst;
- enum stedma40_periph_data_width addr_width;
- int psize;
+ u32 src_maxburst, dst_maxburst;
+ int ret;
+
+ src_addr_width = config->src_addr_width;
+ src_maxburst = config->src_maxburst;
+ dst_addr_width = config->dst_addr_width;
+ dst_maxburst = config->dst_maxburst;
if (config->direction == DMA_FROM_DEVICE) {
dma_addr_t dev_addr_rx =
@@ -2188,8 +2270,11 @@ static void d40_set_runtime_config(struct dma_chan *chan,
cfg->dir);
cfg->dir = STEDMA40_PERIPH_TO_MEM;
- config_addr_width = config->src_addr_width;
- config_maxburst = config->src_maxburst;
+ /* Configure the memory side */
+ if (dst_addr_width == DMA_SLAVE_BUSWIDTH_UNDEFINED)
+ dst_addr_width = src_addr_width;
+ if (dst_maxburst == 0)
+ dst_maxburst = src_maxburst;
} else if (config->direction == DMA_TO_DEVICE) {
dma_addr_t dev_addr_tx =
@@ -2208,68 +2293,39 @@ static void d40_set_runtime_config(struct dma_chan *chan,
cfg->dir);
cfg->dir = STEDMA40_MEM_TO_PERIPH;
- config_addr_width = config->dst_addr_width;
- config_maxburst = config->dst_maxburst;
-
+ /* Configure the memory side */
+ if (src_addr_width == DMA_SLAVE_BUSWIDTH_UNDEFINED)
+ src_addr_width = dst_addr_width;
+ if (src_maxburst == 0)
+ src_maxburst = dst_maxburst;
} else {
dev_err(d40c->base->dev,
"unrecognized channel direction %d\n",
config->direction);
- return;
+ return -EINVAL;
}
- switch (config_addr_width) {
- case DMA_SLAVE_BUSWIDTH_1_BYTE:
- addr_width = STEDMA40_BYTE_WIDTH;
- break;
- case DMA_SLAVE_BUSWIDTH_2_BYTES:
- addr_width = STEDMA40_HALFWORD_WIDTH;
- break;
- case DMA_SLAVE_BUSWIDTH_4_BYTES:
- addr_width = STEDMA40_WORD_WIDTH;
- break;
- case DMA_SLAVE_BUSWIDTH_8_BYTES:
- addr_width = STEDMA40_DOUBLEWORD_WIDTH;
- break;
- default:
+ if (src_maxburst * src_addr_width != dst_maxburst * dst_addr_width) {
dev_err(d40c->base->dev,
- "illegal peripheral address width "
- "requested (%d)\n",
- config->src_addr_width);
- return;
+ "src/dst width/maxburst mismatch: %d*%d != %d*%d\n",
+ src_maxburst,
+ src_addr_width,
+ dst_maxburst,
+ dst_addr_width);
+ return -EINVAL;
}
- if (chan_is_logical(d40c)) {
- if (config_maxburst >= 16)
- psize = STEDMA40_PSIZE_LOG_16;
- else if (config_maxburst >= 8)
- psize = STEDMA40_PSIZE_LOG_8;
- else if (config_maxburst >= 4)
- psize = STEDMA40_PSIZE_LOG_4;
- else
- psize = STEDMA40_PSIZE_LOG_1;
- } else {
- if (config_maxburst >= 16)
- psize = STEDMA40_PSIZE_PHY_16;
- else if (config_maxburst >= 8)
- psize = STEDMA40_PSIZE_PHY_8;
- else if (config_maxburst >= 4)
- psize = STEDMA40_PSIZE_PHY_4;
- else if (config_maxburst >= 2)
- psize = STEDMA40_PSIZE_PHY_2;
- else
- psize = STEDMA40_PSIZE_PHY_1;
- }
+ ret = dma40_config_to_halfchannel(d40c, &cfg->src_info,
+ src_addr_width,
+ src_maxburst);
+ if (ret)
+ return ret;
- /* Set up all the endpoint configs */
- cfg->src_info.data_width = addr_width;
- cfg->src_info.psize = psize;
- cfg->src_info.big_endian = false;
- cfg->src_info.flow_ctrl = STEDMA40_NO_FLOW_CTRL;
- cfg->dst_info.data_width = addr_width;
- cfg->dst_info.psize = psize;
- cfg->dst_info.big_endian = false;
- cfg->dst_info.flow_ctrl = STEDMA40_NO_FLOW_CTRL;
+ ret = dma40_config_to_halfchannel(d40c, &cfg->dst_info,
+ dst_addr_width,
+ dst_maxburst);
+ if (ret)
+ return ret;
/* Fill in register values */
if (chan_is_logical(d40c))
@@ -2282,12 +2338,14 @@ static void d40_set_runtime_config(struct dma_chan *chan,
d40c->runtime_addr = config_addr;
d40c->runtime_direction = config->direction;
dev_dbg(d40c->base->dev,
- "configured channel %s for %s, data width %d, "
- "maxburst %d bytes, LE, no flow control\n",
+ "configured channel %s for %s, data width %d/%d, "
+ "maxburst %d/%d elements, LE, no flow control\n",
dma_chan_name(chan),
(config->direction == DMA_FROM_DEVICE) ? "RX" : "TX",
- config_addr_width,
- config_maxburst);
+ src_addr_width, dst_addr_width,
+ src_maxburst, dst_maxburst);
+
+ return 0;
}
static int d40_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
@@ -2308,9 +2366,8 @@ static int d40_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
case DMA_RESUME:
return d40_resume(d40c);
case DMA_SLAVE_CONFIG:
- d40_set_runtime_config(chan,
+ return d40_set_runtime_config(chan,
(struct dma_slave_config *) arg);
- return 0;
default:
break;
}
@@ -2341,6 +2398,7 @@ static void __init d40_chan_init(struct d40_base *base, struct dma_device *dma,
INIT_LIST_HEAD(&d40c->active);
INIT_LIST_HEAD(&d40c->queue);
+ INIT_LIST_HEAD(&d40c->pending_queue);
INIT_LIST_HEAD(&d40c->client);
tasklet_init(&d40c->tasklet, dma_tasklet,
@@ -2502,25 +2560,6 @@ static int __init d40_phy_res_init(struct d40_base *base)
static struct d40_base * __init d40_hw_detect_init(struct platform_device *pdev)
{
- static const struct d40_reg_val dma_id_regs[] = {
- /* Peripheral Id */
- { .reg = D40_DREG_PERIPHID0, .val = 0x0040},
- { .reg = D40_DREG_PERIPHID1, .val = 0x0000},
- /*
- * D40_DREG_PERIPHID2 Depends on HW revision:
- * DB8500ed has 0x0008,
- * ? has 0x0018,
- * DB8500v1 has 0x0028
- * DB8500v2 has 0x0038
- */
- { .reg = D40_DREG_PERIPHID3, .val = 0x0000},
-
- /* PCell Id */
- { .reg = D40_DREG_CELLID0, .val = 0x000d},
- { .reg = D40_DREG_CELLID1, .val = 0x00f0},
- { .reg = D40_DREG_CELLID2, .val = 0x0005},
- { .reg = D40_DREG_CELLID3, .val = 0x00b1}
- };
struct stedma40_platform_data *plat_data;
struct clk *clk = NULL;
void __iomem *virtbase = NULL;
@@ -2529,8 +2568,9 @@ static struct d40_base * __init d40_hw_detect_init(struct platform_device *pdev)
int num_log_chans = 0;
int num_phy_chans;
int i;
- u32 val;
- u32 rev;
+ u32 pid;
+ u32 cid;
+ u8 rev;
clk = clk_get(&pdev->dev, NULL);
@@ -2554,32 +2594,32 @@ static struct d40_base * __init d40_hw_detect_init(struct platform_device *pdev)
if (!virtbase)
goto failure;
- /* HW version check */
- for (i = 0; i < ARRAY_SIZE(dma_id_regs); i++) {
- if (dma_id_regs[i].val !=
- readl(virtbase + dma_id_regs[i].reg)) {
- d40_err(&pdev->dev,
- "Unknown hardware! Expected 0x%x at 0x%x but got 0x%x\n",
- dma_id_regs[i].val,
- dma_id_regs[i].reg,
- readl(virtbase + dma_id_regs[i].reg));
- goto failure;
- }
- }
+ /* This is just a regular AMBA PrimeCell ID actually */
+ for (pid = 0, i = 0; i < 4; i++)
+ pid |= (readl(virtbase + resource_size(res) - 0x20 + 4 * i)
+ & 255) << (i * 8);
+ for (cid = 0, i = 0; i < 4; i++)
+ cid |= (readl(virtbase + resource_size(res) - 0x10 + 4 * i)
+ & 255) << (i * 8);
- /* Get silicon revision and designer */
- val = readl(virtbase + D40_DREG_PERIPHID2);
-
- if ((val & D40_DREG_PERIPHID2_DESIGNER_MASK) !=
- D40_HW_DESIGNER) {
+ if (cid != AMBA_CID) {
+ d40_err(&pdev->dev, "Unknown hardware! No PrimeCell ID\n");
+ goto failure;
+ }
+ if (AMBA_MANF_BITS(pid) != AMBA_VENDOR_ST) {
d40_err(&pdev->dev, "Unknown designer! Got %x wanted %x\n",
- val & D40_DREG_PERIPHID2_DESIGNER_MASK,
- D40_HW_DESIGNER);
+ AMBA_MANF_BITS(pid),
+ AMBA_VENDOR_ST);
goto failure;
}
-
- rev = (val & D40_DREG_PERIPHID2_REV_MASK) >>
- D40_DREG_PERIPHID2_REV_POS;
+ /*
+ * HW revision:
+ * DB8500ed has revision 0
+ * ? has revision 1
+ * DB8500v1 has revision 2
+ * DB8500v2 has revision 3
+ */
+ rev = AMBA_REV_BITS(pid);
/* The number of physical channels on this HW */
num_phy_chans = 4 * (readl(virtbase + D40_DREG_ICFG) & 0x7) + 4;
diff --git a/drivers/dma/ste_dma40_ll.h b/drivers/dma/ste_dma40_ll.h
index 195ee65ee7f..b44c455158d 100644
--- a/drivers/dma/ste_dma40_ll.h
+++ b/drivers/dma/ste_dma40_ll.h
@@ -184,9 +184,6 @@
#define D40_DREG_PERIPHID0 0xFE0
#define D40_DREG_PERIPHID1 0xFE4
#define D40_DREG_PERIPHID2 0xFE8
-#define D40_DREG_PERIPHID2_REV_POS 4
-#define D40_DREG_PERIPHID2_REV_MASK (0xf << D40_DREG_PERIPHID2_REV_POS)
-#define D40_DREG_PERIPHID2_DESIGNER_MASK 0xf
#define D40_DREG_PERIPHID3 0xFEC
#define D40_DREG_CELLID0 0xFF0
#define D40_DREG_CELLID1 0xFF4
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-03 22:18:08 +0000