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DMAengine updates for v4.16-rc1

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This cycle we have small update for:
   - updates to xilinx and zynqmp dma controllers
   - update reside calculation for rcar controller
   - more RSTify fixes for documentation
   - Add support for race free transfer termination and updating
     for users for that
   - Support for new rev of hidma with addition new APIs to
     get device match data in ACPI/OF
   - Random updates to bunch of other drivers
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Merge tag 'dmaengine-4.16-rc1' of git://git.infradead.org/users/vkoul/slave-dma

Pull dmaengine updates from Vinod Koul:
 "This time is smallish update with updates mainly to drivers:

   - updates to xilinx and zynqmp dma controllers

   - update reside calculation for rcar controller

   - more RSTify fixes for documentation

   - add support for race free transfer termination and updating for
     users for that

   - support for new rev of hidma with addition new APIs to get device
     match data in ACPI/OF

   - random updates to bunch of other drivers"

* tag 'dmaengine-4.16-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (47 commits)
  dmaengine: dmatest: fix container_of member in dmatest_callback
  dmaengine: stm32-dmamux: Remove unnecessary platform_get_resource() error check
  dmaengine: sprd: statify 'sprd_dma_prep_dma_memcpy'
  dmaengine: qcom_hidma: simplify DT resource parsing
  dmaengine: xilinx_dma: Free BD consistent memory
  dmaengine: xilinx_dma: Fix warning variable prev set but not used
  dmaengine: xilinx_dma: properly configure the SG mode bit in the driver for cdma
  dmaengine: doc: format struct fields using monospace
  dmaengine: doc: fix bullet list formatting
  dmaengine: ti-dma-crossbar: Fix event mapping for TPCC_EVT_MUX_60_63
  dmaengine: cppi41: Fix channel queues array size check
  dmaengine: imx-sdma: Add MODULE_FIRMWARE
  dmaengine: xilinx_dma: Fix typos
  dmaengine: xilinx_dma: Differentiate probe based on the ip type
  dmaengine: xilinx_dma: fix style issues from checkpatch
  dmaengine: xilinx_dma: Fix kernel doc warnings
  dmaengine: xilinx_dma: Fix race condition in the driver for multiple descriptor scenario
  dmaeninge: xilinx_dma: Fix bug in multiple frame stores scenario in vdma
  dmaengine: xilinx_dma: Check for channel idle state before submitting dma descriptor
  dmaengine: zynqmp_dma: Fix race condition in the probe
  ...
This commit is contained in:
Linus Torvalds 2018-01-31 11:52:20 -08:00
commit 2155e69a9d
34 changed files with 612 additions and 302 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
Documentation/devicetree/bindings/dma/qcom_hidma_mgmt.txt
View File

@ -47,8 +47,8 @@ When the OS is not in control of the management interface (i.e. it's a guest),
the channel nodes appear on their own, not under a management node.
Required properties:
- compatible: must contain "qcom,hidma-1.0" for initial HW or "qcom,hidma-1.1"
for MSI capable HW.
- compatible: must contain "qcom,hidma-1.0" for initial HW or
"qcom,hidma-1.1"/"qcom,hidma-1.2" for MSI capable HW.
- reg: Addresses for the transfer and event channel
- interrupts: Should contain the event interrupt
- desc-count: Number of asynchronous requests this channel can handle

38
Documentation/driver-api/dmaengine/provider.rst
View File

@ -111,40 +111,36 @@ The first thing you need to do in your driver is to allocate this
structure. Any of the usual memory allocators will do, but you'll also
need to initialize a few fields in there:
- channels: should be initialized as a list using the
- ``channels``: should be initialized as a list using the
INIT_LIST_HEAD macro for example
- src_addr_widths:
- ``src_addr_widths``:
should contain a bitmask of the supported source transfer width
- dst_addr_widths:
- ``dst_addr_widths``:
should contain a bitmask of the supported destination transfer width
- directions:
- ``directions``:
should contain a bitmask of the supported slave directions
(i.e. excluding mem2mem transfers)
- residue_granularity:
- ``residue_granularity``:
granularity of the transfer residue reported to dma_set_residue.
This can be either:
- Granularity of the transfer residue reported to dma_set_residue.
This can be either:
- Descriptor:
your device doesn't support any kind of residue
reporting. The framework will only know that a particular
transaction descriptor is done.
- Descriptor
- Segment:
your device is able to report which chunks have been transferred
- Your device doesn't support any kind of residue
reporting. The framework will only know that a particular
transaction descriptor is done.
- Burst:
your device is able to report which burst have been transferred
- Segment
- Your device is able to report which chunks have been transferred
- Burst
- Your device is able to report which burst have been transferred
- dev: should hold the pointer to the ``struct device`` associated
to your current driver instance.
- ``dev``: should hold the pointer to the ``struct device`` associated
to your current driver instance.
Supported transaction types
---------------------------

18
drivers/acpi/bus.c
View File

@ -785,6 +785,24 @@ const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids,
}
EXPORT_SYMBOL_GPL(acpi_match_device);
void *acpi_get_match_data(const struct device *dev)
{
const struct acpi_device_id *match;
if (!dev->driver)
return NULL;
if (!dev->driver->acpi_match_table)
return NULL;
match = acpi_match_device(dev->driver->acpi_match_table, dev);
if (!match)
return NULL;
return (void *)match->driver_data;
}
EXPORT_SYMBOL_GPL(acpi_get_match_data);
int acpi_match_device_ids(struct acpi_device *device,
const struct acpi_device_id *ids)
{

8
drivers/acpi/property.c
View File

@ -1271,9 +1271,17 @@ static int acpi_fwnode_graph_parse_endpoint(const struct fwnode_handle *fwnode,
return 0;
}
static void *
acpi_fwnode_device_get_match_data(const struct fwnode_handle *fwnode,
const struct device *dev)
{
return acpi_get_match_data(dev);
}
#define DECLARE_ACPI_FWNODE_OPS(ops) \
const struct fwnode_operations ops = { \
.device_is_available = acpi_fwnode_device_is_available, \
.device_get_match_data = acpi_fwnode_device_get_match_data, \
.property_present = acpi_fwnode_property_present, \
.property_read_int_array = \
acpi_fwnode_property_read_int_array, \

7
drivers/base/property.c
View File

@ -1340,3 +1340,10 @@ int fwnode_graph_parse_endpoint(const struct fwnode_handle *fwnode,
return fwnode_call_int_op(fwnode, graph_parse_endpoint, endpoint);
}
EXPORT_SYMBOL(fwnode_graph_parse_endpoint);
void *device_get_match_data(struct device *dev)
{
return fwnode_call_ptr_op(dev_fwnode(dev), device_get_match_data,
dev);
}
EXPORT_SYMBOL_GPL(device_get_match_data);

11
drivers/dma/amba-pl08x.c
View File

@ -2182,7 +2182,7 @@ static int pl08x_terminate_all(struct dma_chan *chan)
}
/* Dequeue jobs and free LLIs */
if (plchan->at) {
pl08x_desc_free(&plchan->at->vd);
vchan_terminate_vdesc(&plchan->at->vd);
plchan->at = NULL;
}
/* Dequeue jobs not yet fired as well */
@ -2193,6 +2193,13 @@ static int pl08x_terminate_all(struct dma_chan *chan)
return 0;
}
static void pl08x_synchronize(struct dma_chan *chan)
{
struct pl08x_dma_chan *plchan = to_pl08x_chan(chan);
vchan_synchronize(&plchan->vc);
}
static int pl08x_pause(struct dma_chan *chan)
{
struct pl08x_dma_chan *plchan = to_pl08x_chan(chan);
@ -2773,6 +2780,7 @@ static int pl08x_probe(struct amba_device *adev, const struct amba_id *id)
pl08x->memcpy.device_pause = pl08x_pause;
pl08x->memcpy.device_resume = pl08x_resume;
pl08x->memcpy.device_terminate_all = pl08x_terminate_all;
pl08x->memcpy.device_synchronize = pl08x_synchronize;
pl08x->memcpy.src_addr_widths = PL80X_DMA_BUSWIDTHS;
pl08x->memcpy.dst_addr_widths = PL80X_DMA_BUSWIDTHS;
pl08x->memcpy.directions = BIT(DMA_MEM_TO_MEM);
@ -2802,6 +2810,7 @@ static int pl08x_probe(struct amba_device *adev, const struct amba_id *id)
pl08x->slave.device_pause = pl08x_pause;
pl08x->slave.device_resume = pl08x_resume;
pl08x->slave.device_terminate_all = pl08x_terminate_all;
pl08x->slave.device_synchronize = pl08x_synchronize;
pl08x->slave.src_addr_widths = PL80X_DMA_BUSWIDTHS;
pl08x->slave.dst_addr_widths = PL80X_DMA_BUSWIDTHS;
pl08x->slave.directions =

10
drivers/dma/bcm2835-dma.c
View File

@ -812,7 +812,7 @@ static int bcm2835_dma_terminate_all(struct dma_chan *chan)
* c->desc is NULL and exit.)
*/
if (c->desc) {
bcm2835_dma_desc_free(&c->desc->vd);
vchan_terminate_vdesc(&c->desc->vd);
c->desc = NULL;
bcm2835_dma_abort(c->chan_base);
@ -836,6 +836,13 @@ static int bcm2835_dma_terminate_all(struct dma_chan *chan)
return 0;
}
static void bcm2835_dma_synchronize(struct dma_chan *chan)
{
struct bcm2835_chan *c = to_bcm2835_dma_chan(chan);
vchan_synchronize(&c->vc);
}
static int bcm2835_dma_chan_init(struct bcm2835_dmadev *d, int chan_id,
int irq, unsigned int irq_flags)
{
@ -942,6 +949,7 @@ static int bcm2835_dma_probe(struct platform_device *pdev)
od->ddev.device_prep_dma_memcpy = bcm2835_dma_prep_dma_memcpy;
od->ddev.device_config = bcm2835_dma_slave_config;
od->ddev.device_terminate_all = bcm2835_dma_terminate_all;
od->ddev.device_synchronize = bcm2835_dma_synchronize;
od->ddev.src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_4_BYTES);
od->ddev.dst_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_4_BYTES);
od->ddev.directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV) |

2
drivers/dma/cppi41.c
View File

@ -934,7 +934,7 @@ static bool cpp41_dma_filter_fn(struct dma_chan *chan, void *param)
BUILD_BUG_ON(ARRAY_SIZE(am335x_usb_queues_rx) !=
ARRAY_SIZE(am335x_usb_queues_tx));
if (WARN_ON(cchan->port_num > ARRAY_SIZE(am335x_usb_queues_rx)))
if (WARN_ON(cchan->port_num >= ARRAY_SIZE(am335x_usb_queues_rx)))
return false;
cchan->q_num = queues[cchan->port_num].submit;

10
drivers/dma/dma-jz4780.c
View File

@ -511,7 +511,7 @@ static int jz4780_dma_terminate_all(struct dma_chan *chan)
/* Clear the DMA status and stop the transfer. */
jz4780_dma_writel(jzdma, JZ_DMA_REG_DCS(jzchan->id), 0);
if (jzchan->desc) {
jz4780_dma_desc_free(&jzchan->desc->vdesc);
vchan_terminate_vdesc(&jzchan->desc->vdesc);
jzchan->desc = NULL;
}
@ -523,6 +523,13 @@ static int jz4780_dma_terminate_all(struct dma_chan *chan)
return 0;
}
static void jz4780_dma_synchronize(struct dma_chan *chan)
{
struct jz4780_dma_chan *jzchan = to_jz4780_dma_chan(chan);
vchan_synchronize(&jzchan->vchan);
}
static int jz4780_dma_config(struct dma_chan *chan,
struct dma_slave_config *config)
{
@ -813,6 +820,7 @@ static int jz4780_dma_probe(struct platform_device *pdev)
dd->device_prep_dma_memcpy = jz4780_dma_prep_dma_memcpy;
dd->device_config = jz4780_dma_config;
dd->device_terminate_all = jz4780_dma_terminate_all;
dd->device_synchronize = jz4780_dma_synchronize;
dd->device_tx_status = jz4780_dma_tx_status;
dd->device_issue_pending = jz4780_dma_issue_pending;
dd->src_addr_widths = JZ_DMA_BUSWIDTHS;

2
drivers/dma/dmatest.c
View File

@ -355,7 +355,7 @@ static void dmatest_callback(void *arg)
{
struct dmatest_done *done = arg;
struct dmatest_thread *thread =
container_of(arg, struct dmatest_thread, done_wait);
container_of(done, struct dmatest_thread, test_done);
if (!thread->done) {
done->done = true;
wake_up_all(done->wait);

7
drivers/dma/edma.c
View File

@ -860,11 +860,8 @@ static int edma_terminate_all(struct dma_chan *chan)
/* Move the cyclic channel back to default queue */
if (!echan->tc && echan->edesc->cyclic)
edma_assign_channel_eventq(echan, EVENTQ_DEFAULT);
/*
* free the running request descriptor
* since it is not in any of the vdesc lists
*/
edma_desc_free(&echan->edesc->vdesc);
vchan_terminate_vdesc(&echan->edesc->vdesc);
echan->edesc = NULL;
}

17
drivers/dma/img-mdc-dma.c
View File

@ -694,7 +694,6 @@ static unsigned int mdc_get_new_events(struct mdc_chan *mchan)
static int mdc_terminate_all(struct dma_chan *chan)
{
struct mdc_chan *mchan = to_mdc_chan(chan);
struct mdc_tx_desc *mdesc;
unsigned long flags;
LIST_HEAD(head);
@ -703,21 +702,28 @@ static int mdc_terminate_all(struct dma_chan *chan)
mdc_chan_writel(mchan, MDC_CONTROL_AND_STATUS_CANCEL,
MDC_CONTROL_AND_STATUS);
mdesc = mchan->desc;
mchan->desc = NULL;
if (mchan->desc) {
vchan_terminate_vdesc(&mchan->desc->vd);
mchan->desc = NULL;
}
vchan_get_all_descriptors(&mchan->vc, &head);
mdc_get_new_events(mchan);
spin_unlock_irqrestore(&mchan->vc.lock, flags);
if (mdesc)
mdc_desc_free(&mdesc->vd);
vchan_dma_desc_free_list(&mchan->vc, &head);
return 0;
}
static void mdc_synchronize(struct dma_chan *chan)
{
struct mdc_chan *mchan = to_mdc_chan(chan);
vchan_synchronize(&mchan->vc);
}
static int mdc_slave_config(struct dma_chan *chan,
struct dma_slave_config *config)
{
@ -952,6 +958,7 @@ static int mdc_dma_probe(struct platform_device *pdev)
mdma->dma_dev.device_tx_status = mdc_tx_status;
mdma->dma_dev.device_issue_pending = mdc_issue_pending;
mdma->dma_dev.device_terminate_all = mdc_terminate_all;
mdma->dma_dev.device_synchronize = mdc_synchronize;
mdma->dma_dev.device_config = mdc_slave_config;
mdma->dma_dev.directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV);

6
drivers/dma/imx-sdma.c
View File

@ -1939,4 +1939,10 @@ module_platform_driver(sdma_driver);
MODULE_AUTHOR("Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>");
MODULE_DESCRIPTION("i.MX SDMA driver");
#if IS_ENABLED(CONFIG_SOC_IMX6Q)
MODULE_FIRMWARE("imx/sdma/sdma-imx6q.bin");
#endif
#if IS_ENABLED(CONFIG_SOC_IMX7D)
MODULE_FIRMWARE("imx/sdma/sdma-imx7d.bin");
#endif
MODULE_LICENSE("GPL");

10
drivers/dma/k3dma.c
View File

@ -719,7 +719,7 @@ static int k3_dma_terminate_all(struct dma_chan *chan)
c->phy = NULL;
p->vchan = NULL;
if (p->ds_run) {
k3_dma_free_desc(&p->ds_run->vd);
vchan_terminate_vdesc(&p->ds_run->vd);
p->ds_run = NULL;
}
p->ds_done = NULL;
@ -730,6 +730,13 @@ static int k3_dma_terminate_all(struct dma_chan *chan)
return 0;
}
static void k3_dma_synchronize(struct dma_chan *chan)
{
struct k3_dma_chan *c = to_k3_chan(chan);
vchan_synchronize(&c->vc);
}
static int k3_dma_transfer_pause(struct dma_chan *chan)
{
struct k3_dma_chan *c = to_k3_chan(chan);
@ -868,6 +875,7 @@ static int k3_dma_probe(struct platform_device *op)
d->slave.device_pause = k3_dma_transfer_pause;
d->slave.device_resume = k3_dma_transfer_resume;
d->slave.device_terminate_all = k3_dma_terminate_all;
d->slave.device_synchronize = k3_dma_synchronize;
d->slave.copy_align = DMAENGINE_ALIGN_8_BYTES;
/* init virtual channel */

4
drivers/dma/mic_x100_dma.c
View File

@ -480,9 +480,7 @@ static int mic_dma_setup_irq(struct mic_dma_chan *ch)
to_mbus_hw_ops(ch)->request_threaded_irq(to_mbus_device(ch),
mic_dma_intr_handler, mic_dma_thread_fn,
"mic dma_channel", ch, ch->ch_num);
if (IS_ERR(ch->cookie))
return PTR_ERR(ch->cookie);
return 0;
return PTR_ERR_OR_ZERO(ch->cookie);
}
static inline void mic_dma_free_irq(struct mic_dma_chan *ch)

2
drivers/dma/omap-dma.c
View File

@ -1311,7 +1311,7 @@ static int omap_dma_terminate_all(struct dma_chan *chan)
* c->desc is NULL and exit.)
*/
if (c->desc) {
omap_dma_desc_free(&c->desc->vd);
vchan_terminate_vdesc(&c->desc->vd);
c->desc = NULL;
/* Avoid stopping the dma twice */
if (!c->paused)

41
drivers/dma/qcom/hidma.c
View File

@ -50,6 +50,7 @@
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/of_dma.h>
#include <linux/of_device.h>
#include <linux/property.h>
#include <linux/delay.h>
#include <linux/acpi.h>
@ -104,6 +105,10 @@ static unsigned int nr_desc_prm;
module_param(nr_desc_prm, uint, 0644);
MODULE_PARM_DESC(nr_desc_prm, "number of descriptors (default: 0)");
enum hidma_cap {
HIDMA_MSI_CAP = 1,
HIDMA_IDENTITY_CAP,
};
/* process completed descriptors */
static void hidma_process_completed(struct hidma_chan *mchan)
@ -736,25 +741,12 @@ static int hidma_request_msi(struct hidma_dev *dmadev,
#endif
}
static bool hidma_msi_capable(struct device *dev)
static bool hidma_test_capability(struct device *dev, enum hidma_cap test_cap)
{
struct acpi_device *adev = ACPI_COMPANION(dev);
const char *of_compat;
int ret = -EINVAL;
enum hidma_cap cap;
if (!adev || acpi_disabled) {
ret = device_property_read_string(dev, "compatible",
&of_compat);
if (ret)
return false;
ret = strcmp(of_compat, "qcom,hidma-1.1");
} else {
#ifdef CONFIG_ACPI
ret = strcmp(acpi_device_hid(adev), "QCOM8062");
#endif
}
return ret == 0;
cap = (enum hidma_cap) device_get_match_data(dev);
return cap ? ((cap & test_cap) > 0) : 0;
}
static int hidma_probe(struct platform_device *pdev)
@ -834,8 +826,7 @@ static int hidma_probe(struct platform_device *pdev)
* Determine the MSI capability of the platform. Old HW doesn't
* support MSI.
*/
msi = hidma_msi_capable(&pdev->dev);
msi = hidma_test_capability(&pdev->dev, HIDMA_MSI_CAP);
device_property_read_u32(&pdev->dev, "desc-count",
&dmadev->nr_descriptors);
@ -848,7 +839,10 @@ static int hidma_probe(struct platform_device *pdev)
if (!dmadev->nr_descriptors)
dmadev->nr_descriptors = HIDMA_NR_DEFAULT_DESC;
dmadev->chidx = readl(dmadev->dev_trca + 0x28);
if (hidma_test_capability(&pdev->dev, HIDMA_IDENTITY_CAP))
dmadev->chidx = readl(dmadev->dev_trca + 0x40);
else
dmadev->chidx = readl(dmadev->dev_trca + 0x28);
/* Set DMA mask to 64 bits. */
rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
@ -953,7 +947,8 @@ static int hidma_remove(struct platform_device *pdev)
#if IS_ENABLED(CONFIG_ACPI)
static const struct acpi_device_id hidma_acpi_ids[] = {
{"QCOM8061"},
{"QCOM8062"},
{"QCOM8062", HIDMA_MSI_CAP},
{"QCOM8063", (HIDMA_MSI_CAP | HIDMA_IDENTITY_CAP)},
{},
};
MODULE_DEVICE_TABLE(acpi, hidma_acpi_ids);
@ -961,7 +956,9 @@ MODULE_DEVICE_TABLE(acpi, hidma_acpi_ids);
static const struct of_device_id hidma_match[] = {
{.compatible = "qcom,hidma-1.0",},
{.compatible = "qcom,hidma-1.1",},
{.compatible = "qcom,hidma-1.1", .data = (void *)(HIDMA_MSI_CAP),},
{.compatible = "qcom,hidma-1.2",
.data = (void *)(HIDMA_MSI_CAP | HIDMA_IDENTITY_CAP),},
{},
};
MODULE_DEVICE_TABLE(of, hidma_match);

9
drivers/dma/qcom/hidma_ll.c
View File

@ -393,6 +393,8 @@ static int hidma_ll_reset(struct hidma_lldev *lldev)
*/
static void hidma_ll_int_handler_internal(struct hidma_lldev *lldev, int cause)
{
unsigned long irqflags;
if (cause & HIDMA_ERR_INT_MASK) {
dev_err(lldev->dev, "error 0x%x, disabling...\n",
cause);
@ -410,6 +412,10 @@ static void hidma_ll_int_handler_internal(struct hidma_lldev *lldev, int cause)
return;
}
spin_lock_irqsave(&lldev->lock, irqflags);
writel_relaxed(cause, lldev->evca + HIDMA_EVCA_IRQ_CLR_REG);
spin_unlock_irqrestore(&lldev->lock, irqflags);
/*
* Fine tuned for this HW...
*
@ -421,9 +427,6 @@ static void hidma_ll_int_handler_internal(struct hidma_lldev *lldev, int cause)
* Try to consume as many EVREs as possible.
*/
hidma_handle_tre_completion(lldev);
/* We consumed TREs or there are pending TREs or EVREs. */
writel_relaxed(cause, lldev->evca + HIDMA_EVCA_IRQ_CLR_REG);
}
irqreturn_t hidma_ll_inthandler(int chirq, void *arg)

67
drivers/dma/qcom/hidma_mgmt.c
View File

@ -17,6 +17,7 @@
#include <linux/acpi.h>
#include <linux/of.h>
#include <linux/property.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/module.h>
@ -356,59 +357,29 @@ static int __init hidma_mgmt_of_populate_channels(struct device_node *np)
{
struct platform_device *pdev_parent = of_find_device_by_node(np);
struct platform_device_info pdevinfo;
struct of_phandle_args out_irq;
struct device_node *child;
struct resource *res = NULL;
const __be32 *cell;
int ret = 0, size, i, num;
u64 addr, addr_size;
struct resource *res;
int ret = 0;
/* allocate a resource array */
res = kcalloc(3, sizeof(*res), GFP_KERNEL);
if (!res)
return -ENOMEM;
for_each_available_child_of_node(np, child) {
struct resource *res_iter;
struct platform_device *new_pdev;
cell = of_get_property(child, "reg", &size);
if (!cell) {
ret = -EINVAL;
goto out;
}
size /= sizeof(*cell);
num = size /
(of_n_addr_cells(child) + of_n_size_cells(child)) + 1;
/* allocate a resource array */
res = kcalloc(num, sizeof(*res), GFP_KERNEL);
if (!res) {
ret = -ENOMEM;
goto out;
}
/* read each reg value */
i = 0;
res_iter = res;
while (i < size) {
addr = of_read_number(&cell[i],
of_n_addr_cells(child));
i += of_n_addr_cells(child);
addr_size = of_read_number(&cell[i],
of_n_size_cells(child));
i += of_n_size_cells(child);
res_iter->start = addr;
res_iter->end = res_iter->start + addr_size - 1;
res_iter->flags = IORESOURCE_MEM;
res_iter++;
}
ret = of_irq_parse_one(child, 0, &out_irq);
if (ret)
ret = of_address_to_resource(child, 0, &res[0]);
if (!ret)
goto out;
res_iter->start = irq_create_of_mapping(&out_irq);
res_iter->name = "hidma event irq";
res_iter->flags = IORESOURCE_IRQ;
ret = of_address_to_resource(child, 1, &res[1]);
if (!ret)
goto out;
ret = of_irq_to_resource(child, 0, &res[2]);
if (ret <= 0)
goto out;
memset(&pdevinfo, 0, sizeof(pdevinfo));
pdevinfo.fwnode = &child->fwnode;
@ -416,7 +387,7 @@ static int __init hidma_mgmt_of_populate_channels(struct device_node *np)
pdevinfo.name = child->name;
pdevinfo.id = object_counter++;
pdevinfo.res = res;
pdevinfo.num_res = num;
pdevinfo.num_res = 3;
pdevinfo.data = NULL;
pdevinfo.size_data = 0;
pdevinfo.dma_mask = DMA_BIT_MASK(64);
@ -434,8 +405,6 @@ static int __init hidma_mgmt_of_populate_channels(struct device_node *np)
*/
of_msi_configure(&new_pdev->dev, child);
of_node_put(child);
kfree(res);
res = NULL;
}
out:
kfree(res);

11
drivers/dma/s3c24xx-dma.c
View File

@ -732,7 +732,7 @@ static int s3c24xx_dma_terminate_all(struct dma_chan *chan)
/* Dequeue current job */
if (s3cchan->at) {
s3c24xx_dma_desc_free(&s3cchan->at->vd);
vchan_terminate_vdesc(&s3cchan->at->vd);
s3cchan->at = NULL;
}
@ -744,6 +744,13 @@ unlock:
return ret;
}
static void s3c24xx_dma_synchronize(struct dma_chan *chan)
{
struct s3c24xx_dma_chan *s3cchan = to_s3c24xx_dma_chan(chan);
vchan_synchronize(&s3cchan->vc);
}
static void s3c24xx_dma_free_chan_resources(struct dma_chan *chan)
{
/* Ensure all queued descriptors are freed */
@ -1282,6 +1289,7 @@ static int s3c24xx_dma_probe(struct platform_device *pdev)
s3cdma->memcpy.device_issue_pending = s3c24xx_dma_issue_pending;
s3cdma->memcpy.device_config = s3c24xx_dma_set_runtime_config;
s3cdma->memcpy.device_terminate_all = s3c24xx_dma_terminate_all;
s3cdma->memcpy.device_synchronize = s3c24xx_dma_synchronize;
/* Initialize slave engine for SoC internal dedicated peripherals */
dma_cap_set(DMA_SLAVE, s3cdma->slave.cap_mask);
@ -1296,6 +1304,7 @@ static int s3c24xx_dma_probe(struct platform_device *pdev)
s3cdma->slave.device_prep_dma_cyclic = s3c24xx_dma_prep_dma_cyclic;
s3cdma->slave.device_config = s3c24xx_dma_set_runtime_config;
s3cdma->slave.device_terminate_all = s3c24xx_dma_terminate_all;
s3cdma->slave.device_synchronize = s3c24xx_dma_synchronize;
s3cdma->slave.filter.map = pdata->slave_map;
s3cdma->slave.filter.mapcnt = pdata->slavecnt;
s3cdma->slave.filter.fn = s3c24xx_dma_filter;

44
drivers/dma/sh/rcar-dmac.c
View File

@ -10,6 +10,7 @@
* published by the Free Software Foundation.
*/
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/dmaengine.h>
#include <linux/interrupt.h>
@ -741,6 +742,41 @@ static int rcar_dmac_fill_hwdesc(struct rcar_dmac_chan *chan,
/* -----------------------------------------------------------------------------
* Stop and reset
*/
static void rcar_dmac_chcr_de_barrier(struct rcar_dmac_chan *chan)
{
u32 chcr;
unsigned int i;
/*
* Ensure that the setting of the DE bit is actually 0 after
* clearing it.
*/
for (i = 0; i < 1024; i++) {
chcr = rcar_dmac_chan_read(chan, RCAR_DMACHCR);
if (!(chcr & RCAR_DMACHCR_DE))
return;
udelay(1);
}
dev_err(chan->chan.device->dev, "CHCR DE check error\n");
}
static void rcar_dmac_sync_tcr(struct rcar_dmac_chan *chan)
{
u32 chcr = rcar_dmac_chan_read(chan, RCAR_DMACHCR);
if (!(chcr & RCAR_DMACHCR_DE))
return;
/* set DE=0 and flush remaining data */
rcar_dmac_chan_write(chan, RCAR_DMACHCR, (chcr & ~RCAR_DMACHCR_DE));
/* make sure all remaining data was flushed */
rcar_dmac_chcr_de_barrier(chan);
/* back DE */
rcar_dmac_chan_write(chan, RCAR_DMACHCR, chcr);
}
static void rcar_dmac_chan_halt(struct rcar_dmac_chan *chan)
{
@ -749,6 +785,7 @@ static void rcar_dmac_chan_halt(struct rcar_dmac_chan *chan)
chcr &= ~(RCAR_DMACHCR_DSE | RCAR_DMACHCR_DSIE | RCAR_DMACHCR_IE |
RCAR_DMACHCR_TE | RCAR_DMACHCR_DE);
rcar_dmac_chan_write(chan, RCAR_DMACHCR, chcr);
rcar_dmac_chcr_de_barrier(chan);
}
static void rcar_dmac_chan_reinit(struct rcar_dmac_chan *chan)
@ -1309,8 +1346,11 @@ static unsigned int rcar_dmac_chan_get_residue(struct rcar_dmac_chan *chan,
residue += chunk->size;
}
if (desc->direction == DMA_DEV_TO_MEM)
rcar_dmac_sync_tcr(chan);
/* Add the residue for the current chunk. */
residue += rcar_dmac_chan_read(chan, RCAR_DMATCR) << desc->xfer_shift;
residue += rcar_dmac_chan_read(chan, RCAR_DMATCRB) << desc->xfer_shift;
return residue;
}
@ -1481,6 +1521,8 @@ static irqreturn_t rcar_dmac_isr_channel(int irq, void *dev)
if (chcr & RCAR_DMACHCR_TE)
mask |= RCAR_DMACHCR_DE;
rcar_dmac_chan_write(chan, RCAR_DMACHCR, chcr & ~mask);
if (mask & RCAR_DMACHCR_DE)
rcar_dmac_chcr_de_barrier(chan);
if (chcr & RCAR_DMACHCR_DSE)
ret |= rcar_dmac_isr_desc_stage_end(chan);

2
drivers/dma/sprd-dma.c
View File

@ -710,7 +710,7 @@ static int sprd_dma_config(struct dma_chan *chan, struct sprd_dma_desc *sdesc,
return 0;
}
struct dma_async_tx_descriptor *
static struct dma_async_tx_descriptor *
sprd_dma_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
size_t len, unsigned long flags)
{

3
drivers/dma/stm32-dmamux.c
View File

@ -253,9 +253,6 @@ static int stm32_dmamux_probe(struct platform_device *pdev)
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res)
return -ENODEV;
iomem = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(iomem))
return PTR_ERR(iomem);

19
drivers/dma/tegra20-apb-dma.c
View File

@ -353,7 +353,8 @@ static int tegra_dma_slave_config(struct dma_chan *dc,
}
memcpy(&tdc->dma_sconfig, sconfig, sizeof(*sconfig));
if (tdc->slave_id == TEGRA_APBDMA_SLAVE_ID_INVALID) {
if (tdc->slave_id == TEGRA_APBDMA_SLAVE_ID_INVALID &&
sconfig->device_fc) {
if (sconfig->slave_id > TEGRA_APBDMA_CSR_REQ_SEL_MASK)
return -EINVAL;
tdc->slave_id = sconfig->slave_id;
@ -970,8 +971,13 @@ static struct dma_async_tx_descriptor *tegra_dma_prep_slave_sg(
TEGRA_APBDMA_AHBSEQ_WRAP_SHIFT;
ahb_seq |= TEGRA_APBDMA_AHBSEQ_BUS_WIDTH_32;
csr |= TEGRA_APBDMA_CSR_ONCE | TEGRA_APBDMA_CSR_FLOW;
csr |= tdc->slave_id << TEGRA_APBDMA_CSR_REQ_SEL_SHIFT;
csr |= TEGRA_APBDMA_CSR_ONCE;
if (tdc->slave_id != TEGRA_APBDMA_SLAVE_ID_INVALID) {
csr |= TEGRA_APBDMA_CSR_FLOW;
csr |= tdc->slave_id << TEGRA_APBDMA_CSR_REQ_SEL_SHIFT;
}
if (flags & DMA_PREP_INTERRUPT)
csr |= TEGRA_APBDMA_CSR_IE_EOC;
@ -1110,10 +1116,13 @@ static struct dma_async_tx_descriptor *tegra_dma_prep_dma_cyclic(
TEGRA_APBDMA_AHBSEQ_WRAP_SHIFT;
ahb_seq |= TEGRA_APBDMA_AHBSEQ_BUS_WIDTH_32;
csr |= TEGRA_APBDMA_CSR_FLOW;
if (tdc->slave_id != TEGRA_APBDMA_SLAVE_ID_INVALID) {
csr |= TEGRA_APBDMA_CSR_FLOW;
csr |= tdc->slave_id << TEGRA_APBDMA_CSR_REQ_SEL_SHIFT;
}
if (flags & DMA_PREP_INTERRUPT)
csr |= TEGRA_APBDMA_CSR_IE_EOC;
csr |= tdc->slave_id << TEGRA_APBDMA_CSR_REQ_SEL_SHIFT;
apb_seq |= TEGRA_APBDMA_APBSEQ_WRAP_WORD_1;

10
drivers/dma/ti-dma-crossbar.c
View File

@ -54,7 +54,15 @@ struct ti_am335x_xbar_map {
static inline void ti_am335x_xbar_write(void __iomem *iomem, int event, u8 val)
{
writeb_relaxed(val, iomem + event);
/*
* TPCC_EVT_MUX_60_63 register layout is different than the
* rest, in the sense, that event 63 is mapped to lowest byte
* and event 60 is mapped to highest, handle it separately.
*/
if (event >= 60 && event <= 63)
writeb_relaxed(val, iomem + (63 - event % 4));
else
writeb_relaxed(val, iomem + event);
}
static void ti_am335x_xbar_free(struct device *dev, void *route_data)

2
drivers/dma/timb_dma.c
View File

@ -422,7 +422,7 @@ static int td_alloc_chan_resources(struct dma_chan *chan)
break;
else {
dev_err(chan2dev(chan),
"Couldnt allocate any descriptors\n");
"Couldn't allocate any descriptors\n");
return -ENOMEM;
}
}

5
drivers/dma/virt-dma.c
View File

@ -107,10 +107,7 @@ static void vchan_complete(unsigned long arg)
dmaengine_desc_get_callback(&vd->tx, &cb);
list_del(&vd->node);
if (dmaengine_desc_test_reuse(&vd->tx))
list_add(&vd->node, &vc->desc_allocated);
else
vc->desc_free(vd);
vchan_vdesc_fini(vd);
dmaengine_desc_callback_invoke(&cb, NULL);
}

44
drivers/dma/virt-dma.h
View File

@ -35,6 +35,7 @@ struct virt_dma_chan {
struct list_head desc_completed;
struct virt_dma_desc *cyclic;
struct virt_dma_desc *vd_terminated;
};
static inline struct virt_dma_chan *to_virt_chan(struct dma_chan *chan)
@ -103,6 +104,20 @@ static inline void vchan_cookie_complete(struct virt_dma_desc *vd)
tasklet_schedule(&vc->task);
}
/**
* vchan_vdesc_fini - Free or reuse a descriptor
* @vd: virtual descriptor to free/reuse
*/
static inline void vchan_vdesc_fini(struct virt_dma_desc *vd)
{
struct virt_dma_chan *vc = to_virt_chan(vd->tx.chan);
if (dmaengine_desc_test_reuse(&vd->tx))
list_add(&vd->node, &vc->desc_allocated);
else
vc->desc_free(vd);
}
/**
* vchan_cyclic_callback - report the completion of a period
* @vd: virtual descriptor
@ -115,6 +130,25 @@ static inline void vchan_cyclic_callback(struct virt_dma_desc *vd)
tasklet_schedule(&vc->task);
}
/**
* vchan_terminate_vdesc - Disable pending cyclic callback
* @vd: virtual descriptor to be terminated
*
* vc.lock must be held by caller
*/
static inline void vchan_terminate_vdesc(struct virt_dma_desc *vd)
{
struct virt_dma_chan *vc = to_virt_chan(vd->tx.chan);
/* free up stuck descriptor */
if (vc->vd_terminated)
vchan_vdesc_fini(vc->vd_terminated);
vc->vd_terminated = vd;
if (vc->cyclic == vd)
vc->cyclic = NULL;
}
/**
* vchan_next_desc - peek at the next descriptor to be processed
* @vc: virtual channel to obtain descriptor from
@ -168,10 +202,20 @@ static inline void vchan_free_chan_resources(struct virt_dma_chan *vc)
* Makes sure that all scheduled or active callbacks have finished running. For
* proper operation the caller has to ensure that no new callbacks are scheduled
* after the invocation of this function started.
* Free up the terminated cyclic descriptor to prevent memory leakage.
*/
static inline void vchan_synchronize(struct virt_dma_chan *vc)
{
unsigned long flags;
tasklet_kill(&vc->task);
spin_lock_irqsave(&vc->lock, flags);
if (vc->vd_terminated) {
vchan_vdesc_fini(vc->vd_terminated);
vc->vd_terminated = NULL;
}
spin_unlock_irqrestore(&vc->lock, flags);
}
#endif

302
drivers/dma/xilinx/xilinx_dma.c
View File

@ -99,7 +99,9 @@
#define XILINX_DMA_REG_FRMPTR_STS 0x0024
#define XILINX_DMA_REG_PARK_PTR 0x0028
#define XILINX_DMA_PARK_PTR_WR_REF_SHIFT 8
#define XILINX_DMA_PARK_PTR_WR_REF_MASK GENMASK(12, 8)
#define XILINX_DMA_PARK_PTR_RD_REF_SHIFT 0
#define XILINX_DMA_PARK_PTR_RD_REF_MASK GENMASK(4, 0)
#define XILINX_DMA_REG_VDMA_VERSION 0x002c
/* Register Direct Mode Registers */
@ -163,6 +165,7 @@
#define XILINX_DMA_BD_SOP BIT(27)
#define XILINX_DMA_BD_EOP BIT(26)
#define XILINX_DMA_COALESCE_MAX 255
#define XILINX_DMA_NUM_DESCS 255
#define XILINX_DMA_NUM_APP_WORDS 5
/* Multi-Channel DMA Descriptor offsets*/
@ -211,8 +214,8 @@ struct xilinx_vdma_desc_hw {
* @next_desc_msb: MSB of Next Descriptor Pointer @0x04
* @buf_addr: Buffer address @0x08
* @buf_addr_msb: MSB of Buffer address @0x0C
* @pad1: Reserved @0x10
* @pad2: Reserved @0x14
* @mcdma_control: Control field for mcdma @0x10
* @vsize_stride: Vsize and Stride field for mcdma @0x14
* @control: Control field @0x18
* @status: Status field @0x1C
* @app: APP Fields @0x20 - 0x30
@ -232,11 +235,11 @@ struct xilinx_axidma_desc_hw {
/**
* struct xilinx_cdma_desc_hw - Hardware Descriptor
* @next_desc: Next Descriptor Pointer @0x00
* @next_descmsb: Next Descriptor Pointer MSB @0x04
* @next_desc_msb: Next Descriptor Pointer MSB @0x04
* @src_addr: Source address @0x08
* @src_addrmsb: Source address MSB @0x0C
* @src_addr_msb: Source address MSB @0x0C
* @dest_addr: Destination address @0x10
* @dest_addrmsb: Destination address MSB @0x14
* @dest_addr_msb: Destination address MSB @0x14
* @control: Control field @0x18
* @status: Status field @0x1C
*/
@ -310,6 +313,7 @@ struct xilinx_dma_tx_descriptor {
* @pending_list: Descriptors waiting
* @active_list: Descriptors ready to submit
* @done_list: Complete descriptors
* @free_seg_list: Free descriptors
* @common: DMA common channel
* @desc_pool: Descriptors pool
* @dev: The dma device
@ -321,6 +325,7 @@ struct xilinx_dma_tx_descriptor {
* @cyclic: Check for cyclic transfers.
* @genlock: Support genlock mode
* @err: Channel has errors
* @idle: Check for channel idle
* @tasklet: Cleanup work after irq
* @config: Device configuration info
* @flush_on_fsync: Flush on Frame sync
@ -329,9 +334,12 @@ struct xilinx_dma_tx_descriptor {
* @desc_submitcount: Descriptor h/w submitted count
* @residue: Residue for AXI DMA
* @seg_v: Statically allocated segments base
* @seg_p: Physical allocated segments base
* @cyclic_seg_v: Statically allocated segment base for cyclic transfers
* @cyclic_seg_p: Physical allocated segments base for cyclic dma
* @start_transfer: Differentiate b/w DMA IP's transfer
* @stop_transfer: Differentiate b/w DMA IP's quiesce
* @tdest: TDEST value for mcdma
*/
struct xilinx_dma_chan {
struct xilinx_dma_device *xdev;
@ -341,6 +349,7 @@ struct xilinx_dma_chan {
struct list_head pending_list;
struct list_head active_list;
struct list_head done_list;
struct list_head free_seg_list;
struct dma_chan common;
struct dma_pool *desc_pool;
struct device *dev;
@ -352,6 +361,7 @@ struct xilinx_dma_chan {
bool cyclic;
bool genlock;
bool err;
bool idle;
struct tasklet_struct tasklet;
struct xilinx_vdma_config config;
bool flush_on_fsync;
@ -360,18 +370,20 @@ struct xilinx_dma_chan {
u32 desc_submitcount;
u32 residue;
struct xilinx_axidma_tx_segment *seg_v;
dma_addr_t seg_p;
struct xilinx_axidma_tx_segment *cyclic_seg_v;
dma_addr_t cyclic_seg_p;
void (*start_transfer)(struct xilinx_dma_chan *chan);
int (*stop_transfer)(struct xilinx_dma_chan *chan);
u16 tdest;
};
/**
* enum xdma_ip_type: DMA IP type.
* enum xdma_ip_type - DMA IP type.
*
* XDMA_TYPE_AXIDMA: Axi dma ip.
* XDMA_TYPE_CDMA: Axi cdma ip.
* XDMA_TYPE_VDMA: Axi vdma ip.
* @XDMA_TYPE_AXIDMA: Axi dma ip.
* @XDMA_TYPE_CDMA: Axi cdma ip.
* @XDMA_TYPE_VDMA: Axi vdma ip.
*
*/
enum xdma_ip_type {
@ -580,18 +592,32 @@ xilinx_cdma_alloc_tx_segment(struct xilinx_dma_chan *chan)
static struct xilinx_axidma_tx_segment *
xilinx_axidma_alloc_tx_segment(struct xilinx_dma_chan *chan)
{
struct xilinx_axidma_tx_segment *segment;
dma_addr_t phys;
struct xilinx_axidma_tx_segment *segment = NULL;
unsigned long flags;
segment = dma_pool_zalloc(chan->desc_pool, GFP_ATOMIC, &phys);
if (!segment)
return NULL;
segment->phys = phys;
spin_lock_irqsave(&chan->lock, flags);
if (!list_empty(&chan->free_seg_list)) {
segment = list_first_entry(&chan->free_seg_list,
struct xilinx_axidma_tx_segment,
node);
list_del(&segment->node);
}
spin_unlock_irqrestore(&chan->lock, flags);
return segment;
}
static void xilinx_dma_clean_hw_desc(struct xilinx_axidma_desc_hw *hw)
{
u32 next_desc = hw->next_desc;
u32 next_desc_msb = hw->next_desc_msb;
memset(hw, 0, sizeof(struct xilinx_axidma_desc_hw));
hw->next_desc = next_desc;
hw->next_desc_msb = next_desc_msb;
}
/**
* xilinx_dma_free_tx_segment - Free transaction segment
* @chan: Driver specific DMA channel
@ -600,7 +626,9 @@ xilinx_axidma_alloc_tx_segment(struct xilinx_dma_chan *chan)
static void xilinx_dma_free_tx_segment(struct xilinx_dma_chan *chan,
struct xilinx_axidma_tx_segment *segment)
{
dma_pool_free(chan->desc_pool, segment, segment->phys);
xilinx_dma_clean_hw_desc(&segment->hw);
list_add_tail(&segment->node, &chan->free_seg_list);
}
/**
@ -725,16 +753,31 @@ static void xilinx_dma_free_descriptors(struct xilinx_dma_chan *chan)
static void xilinx_dma_free_chan_resources(struct dma_chan *dchan)
{
struct xilinx_dma_chan *chan = to_xilinx_chan(dchan);
unsigned long flags;
dev_dbg(chan->dev, "Free all channel resources.\n");
xilinx_dma_free_descriptors(chan);
if (chan->xdev->dma_config->dmatype == XDMA_TYPE_AXIDMA) {
xilinx_dma_free_tx_segment(chan, chan->cyclic_seg_v);
xilinx_dma_free_tx_segment(chan, chan->seg_v);
spin_lock_irqsave(&chan->lock, flags);
INIT_LIST_HEAD(&chan->free_seg_list);
spin_unlock_irqrestore(&chan->lock, flags);
/* Free memory that is allocated for BD */
dma_free_coherent(chan->dev, sizeof(*chan->seg_v) *
XILINX_DMA_NUM_DESCS, chan->seg_v,
chan->seg_p);
/* Free Memory that is allocated for cyclic DMA Mode */
dma_free_coherent(chan->dev, sizeof(*chan->cyclic_seg_v),
chan->cyclic_seg_v, chan->cyclic_seg_p);
}
if (chan->xdev->dma_config->dmatype != XDMA_TYPE_AXIDMA) {
dma_pool_destroy(chan->desc_pool);
chan->desc_pool = NULL;
}
dma_pool_destroy(chan->desc_pool);
chan->desc_pool = NULL;
}
/**
@ -817,6 +860,7 @@ static void xilinx_dma_do_tasklet(unsigned long data)
static int xilinx_dma_alloc_chan_resources(struct dma_chan *dchan)
{
struct xilinx_dma_chan *chan = to_xilinx_chan(dchan);
int i;
/* Has this channel already been allocated? */
if (chan->desc_pool)
@ -827,11 +871,30 @@ static int xilinx_dma_alloc_chan_resources(struct dma_chan *dchan)
* for meeting Xilinx VDMA specification requirement.
*/
if (chan->xdev->dma_config->dmatype == XDMA_TYPE_AXIDMA) {
chan->desc_pool = dma_pool_create("xilinx_dma_desc_pool",
chan->dev,
sizeof(struct xilinx_axidma_tx_segment),
__alignof__(struct xilinx_axidma_tx_segment),
0);
/* Allocate the buffer descriptors. */
chan->seg_v = dma_zalloc_coherent(chan->dev,
sizeof(*chan->seg_v) *
XILINX_DMA_NUM_DESCS,
&chan->seg_p, GFP_KERNEL);
if (!chan->seg_v) {
dev_err(chan->dev,
"unable to allocate channel %d descriptors\n",
chan->id);
return -ENOMEM;
}
for (i = 0; i < XILINX_DMA_NUM_DESCS; i++) {
chan->seg_v[i].hw.next_desc =
lower_32_bits(chan->seg_p + sizeof(*chan->seg_v) *
((i + 1) % XILINX_DMA_NUM_DESCS));
chan->seg_v[i].hw.next_desc_msb =
upper_32_bits(chan->seg_p + sizeof(*chan->seg_v) *
((i + 1) % XILINX_DMA_NUM_DESCS));
chan->seg_v[i].phys = chan->seg_p +
sizeof(*chan->seg_v) * i;
list_add_tail(&chan->seg_v[i].node,
&chan->free_seg_list);
}
} else if (chan->xdev->dma_config->dmatype == XDMA_TYPE_CDMA) {
chan->desc_pool = dma_pool_create("xilinx_cdma_desc_pool",
chan->dev,
@ -846,7 +909,8 @@ static int xilinx_dma_alloc_chan_resources(struct dma_chan *dchan)
0);
}
if (!chan->desc_pool) {
if (!chan->desc_pool &&
(chan->xdev->dma_config->dmatype != XDMA_TYPE_AXIDMA)) {
dev_err(chan->dev,
"unable to allocate channel %d descriptor pool\n",
chan->id);
@ -854,23 +918,21 @@ static int xilinx_dma_alloc_chan_resources(struct dma_chan *dchan)
}
if (chan->xdev->dma_config->dmatype == XDMA_TYPE_AXIDMA) {
/*
* For AXI DMA case after submitting a pending_list, keep
* an extra segment allocated so that the "next descriptor"
* pointer on the tail descriptor always points to a
* valid descriptor, even when paused after reaching taildesc.
* This way, it is possible to issue additional
* transfers without halting and restarting the channel.
*/
chan->seg_v = xilinx_axidma_alloc_tx_segment(chan);
/*
* For cyclic DMA mode we need to program the tail Descriptor
* register with a value which is not a part of the BD chain
* so allocating a desc segment during channel allocation for
* programming tail descriptor.
*/
chan->cyclic_seg_v = xilinx_axidma_alloc_tx_segment(chan);
chan->cyclic_seg_v = dma_zalloc_coherent(chan->dev,
sizeof(*chan->cyclic_seg_v),
&chan->cyclic_seg_p, GFP_KERNEL);
if (!chan->cyclic_seg_v) {
dev_err(chan->dev,
"unable to allocate desc segment for cyclic DMA\n");
return -ENOMEM;
}
chan->cyclic_seg_v->phys = chan->cyclic_seg_p;
}
dma_cookie_init(dchan);
@ -935,35 +997,11 @@ static enum dma_status xilinx_dma_tx_status(struct dma_chan *dchan,
return ret;
}
/**
* xilinx_dma_is_running - Check if DMA channel is running
* @chan: Driver specific DMA channel
*
* Return: '1' if running, '0' if not.
*/
static bool xilinx_dma_is_running(struct xilinx_dma_chan *chan)
{
return !(dma_ctrl_read(chan, XILINX_DMA_REG_DMASR) &
XILINX_DMA_DMASR_HALTED) &&
(dma_ctrl_read(chan, XILINX_DMA_REG_DMACR) &
XILINX_DMA_DMACR_RUNSTOP);
}
/**
* xilinx_dma_is_idle - Check if DMA channel is idle
* @chan: Driver specific DMA channel
*
* Return: '1' if idle, '0' if not.
*/
static bool xilinx_dma_is_idle(struct xilinx_dma_chan *chan)
{
return dma_ctrl_read(chan, XILINX_DMA_REG_DMASR) &
XILINX_DMA_DMASR_IDLE;
}
/**
* xilinx_dma_stop_transfer - Halt DMA channel
* @chan: Driver specific DMA channel
*
* Return: '0' on success and failure value on error
*/
static int xilinx_dma_stop_transfer(struct xilinx_dma_chan *chan)
{
@ -980,6 +1018,8 @@ static int xilinx_dma_stop_transfer(struct xilinx_dma_chan *chan)
/**
* xilinx_cdma_stop_transfer - Wait for the current transfer to complete
* @chan: Driver specific DMA channel
*
* Return: '0' on success and failure value on error
*/
static int xilinx_cdma_stop_transfer(struct xilinx_dma_chan *chan)
{
@ -1022,13 +1062,16 @@ static void xilinx_vdma_start_transfer(struct xilinx_dma_chan *chan)
{
struct xilinx_vdma_config *config = &chan->config;
struct xilinx_dma_tx_descriptor *desc, *tail_desc;
u32 reg;
u32 reg, j;
struct xilinx_vdma_tx_segment *tail_segment;
/* This function was invoked with lock held */
if (chan->err)
return;
if (!chan->idle)
return;
if (list_empty(&chan->pending_list))
return;
@ -1040,13 +1083,6 @@ static void xilinx_vdma_start_transfer(struct xilinx_dma_chan *chan)
tail_segment = list_last_entry(&tail_desc->segments,
struct xilinx_vdma_tx_segment, node);
/* If it is SG mode and hardware is busy, cannot submit */
if (chan->has_sg && xilinx_dma_is_running(chan) &&
!xilinx_dma_is_idle(chan)) {
dev_dbg(chan->dev, "DMA controller still busy\n");
return;
}
/*
* If hardware is idle, then all descriptors on the running lists are
* done, start new transfers
@ -1063,10 +1099,6 @@ static void xilinx_vdma_start_transfer(struct xilinx_dma_chan *chan)
else
reg &= ~XILINX_DMA_DMACR_FRAMECNT_EN;
/* Configure channel to allow number frame buffers */
dma_ctrl_write(chan, XILINX_DMA_REG_FRMSTORE,
chan->desc_pendingcount);
/*
* With SG, start with circular mode, so that BDs can be fetched.
* In direct register mode, if not parking, enable circular mode
@ -1079,17 +1111,16 @@ static void xilinx_vdma_start_transfer(struct xilinx_dma_chan *chan)
dma_ctrl_write(chan, XILINX_DMA_REG_DMACR, reg);
if (config->park && (config->park_frm >= 0) &&
(config->park_frm < chan->num_frms)) {
if (chan->direction == DMA_MEM_TO_DEV)
dma_write(chan, XILINX_DMA_REG_PARK_PTR,
config->park_frm <<
XILINX_DMA_PARK_PTR_RD_REF_SHIFT);
else
dma_write(chan, XILINX_DMA_REG_PARK_PTR,
config->park_frm <<
XILINX_DMA_PARK_PTR_WR_REF_SHIFT);
j = chan->desc_submitcount;
reg = dma_read(chan, XILINX_DMA_REG_PARK_PTR);
if (chan->direction == DMA_MEM_TO_DEV) {
reg &= ~XILINX_DMA_PARK_PTR_RD_REF_MASK;
reg |= j << XILINX_DMA_PARK_PTR_RD_REF_SHIFT;
} else {
reg &= ~XILINX_DMA_PARK_PTR_WR_REF_MASK;
reg |= j << XILINX_DMA_PARK_PTR_WR_REF_SHIFT;
}
dma_write(chan, XILINX_DMA_REG_PARK_PTR, reg);
/* Start the hardware */
xilinx_dma_start(chan);
@ -1101,6 +1132,8 @@ static void xilinx_vdma_start_transfer(struct xilinx_dma_chan *chan)
if (chan->has_sg) {
dma_ctrl_write(chan, XILINX_DMA_REG_TAILDESC,
tail_segment->phys);
list_splice_tail_init(&chan->pending_list, &chan->active_list);
chan->desc_pendingcount = 0;
} else {
struct xilinx_vdma_tx_segment *segment, *last = NULL;
int i = 0;
@ -1130,19 +1163,16 @@ static void xilinx_vdma_start_transfer(struct xilinx_dma_chan *chan)
vdma_desc_write(chan, XILINX_DMA_REG_FRMDLY_STRIDE,
last->hw.stride);
vdma_desc_write(chan, XILINX_DMA_REG_VSIZE, last->hw.vsize);
}
if (!chan->has_sg) {
list_del(&desc->node);
list_add_tail(&desc->node, &chan->active_list);
chan->desc_submitcount++;
chan->desc_pendingcount--;
list_del(&desc->node);
list_add_tail(&desc->node, &chan->active_list);
if (chan->desc_submitcount == chan->num_frms)
chan->desc_submitcount = 0;
} else {
list_splice_tail_init(&chan->pending_list, &chan->active_list);
chan->desc_pendingcount = 0;
}
chan->idle = false;
}
/**
@ -1158,6 +1188,9 @@ static void xilinx_cdma_start_transfer(struct xilinx_dma_chan *chan)
if (chan->err)
return;
if (!chan->idle)
return;
if (list_empty(&chan->pending_list))
return;
@ -1176,6 +1209,12 @@ static void xilinx_cdma_start_transfer(struct xilinx_dma_chan *chan)
}
if (chan->has_sg) {
dma_ctrl_clr(chan, XILINX_DMA_REG_DMACR,
XILINX_CDMA_CR_SGMODE);
dma_ctrl_set(chan, XILINX_DMA_REG_DMACR,
XILINX_CDMA_CR_SGMODE);
xilinx_write(chan, XILINX_DMA_REG_CURDESC,
head_desc->async_tx.phys);
@ -1203,6 +1242,7 @@ static void xilinx_cdma_start_transfer(struct xilinx_dma_chan *chan)
list_splice_tail_init(&chan->pending_list, &chan->active_list);
chan->desc_pendingcount = 0;
chan->idle = false;
}
/**
@ -1212,7 +1252,7 @@ static void xilinx_cdma_start_transfer(struct xilinx_dma_chan *chan)
static void xilinx_dma_start_transfer(struct xilinx_dma_chan *chan)
{
struct xilinx_dma_tx_descriptor *head_desc, *tail_desc;
struct xilinx_axidma_tx_segment *tail_segment, *old_head, *new_head;
struct xilinx_axidma_tx_segment *tail_segment;
u32 reg;
if (chan->err)
@ -1221,12 +1261,8 @@ static void xilinx_dma_start_transfer(struct xilinx_dma_chan *chan)
if (list_empty(&chan->pending_list))
return;
/* If it is SG mode and hardware is busy, cannot submit */
if (chan->has_sg && xilinx_dma_is_running(chan) &&
!xilinx_dma_is_idle(chan)) {
dev_dbg(chan->dev, "DMA controller still busy\n");
if (!chan->idle)
return;
}
head_desc = list_first_entry(&chan->pending_list,
struct xilinx_dma_tx_descriptor, node);
@ -1235,21 +1271,6 @@ static void xilinx_dma_start_transfer(struct xilinx_dma_chan *chan)
tail_segment = list_last_entry(&tail_desc->segments,
struct xilinx_axidma_tx_segment, node);
if (chan->has_sg && !chan->xdev->mcdma) {
old_head = list_first_entry(&head_desc->segments,
struct xilinx_axidma_tx_segment, node);
new_head = chan->seg_v;
/* Copy Buffer Descriptor fields. */
new_head->hw = old_head->hw;
/* Swap and save new reserve */
list_replace_init(&old_head->node, &new_head->node);
chan->seg_v = old_head;
tail_segment->hw.next_desc = chan->seg_v->phys;
head_desc->async_tx.phys = new_head->phys;
}
reg = dma_ctrl_read(chan, XILINX_DMA_REG_DMACR);
if (chan->desc_pendingcount <= XILINX_DMA_COALESCE_MAX) {
@ -1324,6 +1345,7 @@ static void xilinx_dma_start_transfer(struct xilinx_dma_chan *chan)
list_splice_tail_init(&chan->pending_list, &chan->active_list);
chan->desc_pendingcount = 0;
chan->idle = false;
}
/**
@ -1388,6 +1410,8 @@ static int xilinx_dma_reset(struct xilinx_dma_chan *chan)
}
chan->err = false;
chan->idle = true;
chan->desc_submitcount = 0;
return err;
}
@ -1469,6 +1493,7 @@ static irqreturn_t xilinx_dma_irq_handler(int irq, void *data)
if (status & XILINX_DMA_DMASR_FRM_CNT_IRQ) {
spin_lock(&chan->lock);
xilinx_dma_complete_descriptor(chan);
chan->idle = true;
chan->start_transfer(chan);
spin_unlock(&chan->lock);
}
@ -1591,7 +1616,7 @@ xilinx_vdma_dma_prep_interleaved(struct dma_chan *dchan,
{
struct xilinx_dma_chan *chan = to_xilinx_chan(dchan);
struct xilinx_dma_tx_descriptor *desc;
struct xilinx_vdma_tx_segment *segment, *prev = NULL;
struct xilinx_vdma_tx_segment *segment;
struct xilinx_vdma_desc_hw *hw;
if (!is_slave_direction(xt->dir))
@ -1645,8 +1670,6 @@ xilinx_vdma_dma_prep_interleaved(struct dma_chan *dchan,
/* Insert the segment into the descriptor segments list. */
list_add_tail(&segment->node, &desc->segments);
prev = segment;
/* Link the last hardware descriptor with the first. */
segment = list_first_entry(&desc->segments,
struct xilinx_vdma_tx_segment, node);
@ -1733,7 +1756,7 @@ static struct dma_async_tx_descriptor *xilinx_dma_prep_slave_sg(
{
struct xilinx_dma_chan *chan = to_xilinx_chan(dchan);
struct xilinx_dma_tx_descriptor *desc;
struct xilinx_axidma_tx_segment *segment = NULL, *prev = NULL;
struct xilinx_axidma_tx_segment *segment = NULL;
u32 *app_w = (u32 *)context;
struct scatterlist *sg;
size_t copy;
@ -1784,10 +1807,6 @@ static struct dma_async_tx_descriptor *xilinx_dma_prep_slave_sg(
XILINX_DMA_NUM_APP_WORDS);
}
if (prev)
prev->hw.next_desc = segment->phys;
prev = segment;
sg_used += copy;
/*
@ -1801,7 +1820,6 @@ static struct dma_async_tx_descriptor *xilinx_dma_prep_slave_sg(
segment = list_first_entry(&desc->segments,
struct xilinx_axidma_tx_segment, node);
desc->async_tx.phys = segment->phys;
prev->hw.next_desc = segment->phys;
/* For the last DMA_MEM_TO_DEV transfer, set EOP */
if (chan->direction == DMA_MEM_TO_DEV) {
@ -1821,11 +1839,14 @@ error:
/**
* xilinx_dma_prep_dma_cyclic - prepare descriptors for a DMA_SLAVE transaction
* @chan: DMA channel
* @sgl: scatterlist to transfer to/from
* @sg_len: number of entries in @scatterlist
* @dchan: DMA channel
* @buf_addr: Physical address of the buffer
* @buf_len: Total length of the cyclic buffers
* @period_len: length of individual cyclic buffer
* @direction: DMA direction
* @flags: transfer ack flags
*
* Return: Async transaction descriptor on success and NULL on failure
*/
static struct dma_async_tx_descriptor *xilinx_dma_prep_dma_cyclic(
struct dma_chan *dchan, dma_addr_t buf_addr, size_t buf_len,
@ -2009,7 +2030,9 @@ error:
/**
* xilinx_dma_terminate_all - Halt the channel and free descriptors
* @chan: Driver specific DMA Channel pointer
* @dchan: Driver specific DMA Channel pointer
*
* Return: '0' always.
*/
static int xilinx_dma_terminate_all(struct dma_chan *dchan)
{
@ -2029,6 +2052,7 @@ static int xilinx_dma_terminate_all(struct dma_chan *dchan)
/* Remove and free all of the descriptors in the lists */
xilinx_dma_free_descriptors(chan);
chan->idle = true;
if (chan->cyclic) {
reg = dma_ctrl_read(chan, XILINX_DMA_REG_DMACR);
@ -2037,6 +2061,10 @@ static int xilinx_dma_terminate_all(struct dma_chan *dchan)
chan->cyclic = false;
}
if ((chan->xdev->dma_config->dmatype == XDMA_TYPE_CDMA) && chan->has_sg)
dma_ctrl_clr(chan, XILINX_DMA_REG_DMACR,
XILINX_CDMA_CR_SGMODE);
return 0;
}
@ -2323,6 +2351,7 @@ static void xdma_disable_allclks(struct xilinx_dma_device *xdev)
*
* @xdev: Driver specific device structure
* @node: Device node
* @chan_id: DMA Channel id
*
* Return: '0' on success and failure value on error
*/
@ -2344,11 +2373,18 @@ static int xilinx_dma_chan_probe(struct xilinx_dma_device *xdev,
chan->has_sg = xdev->has_sg;
chan->desc_pendingcount = 0x0;
chan->ext_addr = xdev->ext_addr;
/* This variable ensures that descriptors are not
* Submitted when dma engine is in progress. This variable is
* Added to avoid polling for a bit in the status register to
* Know dma state in the driver hot path.
*/
chan->idle = true;
spin_lock_init(&chan->lock);
INIT_LIST_HEAD(&chan->pending_list);
INIT_LIST_HEAD(&chan->done_list);
INIT_LIST_HEAD(&chan->active_list);
INIT_LIST_HEAD(&chan->free_seg_list);
/* Retrieve the channel properties from the device tree */
has_dre = of_property_read_bool(node, "xlnx,include-dre");
@ -2379,6 +2415,7 @@ static int xilinx_dma_chan_probe(struct xilinx_dma_device *xdev,
chan->ctrl_offset = XILINX_DMA_MM2S_CTRL_OFFSET;
if (xdev->dma_config->dmatype == XDMA_TYPE_VDMA) {
chan->desc_offset = XILINX_VDMA_MM2S_DESC_OFFSET;
chan->config.park = 1;
if (xdev->flush_on_fsync == XILINX_DMA_FLUSH_BOTH ||
xdev->flush_on_fsync == XILINX_DMA_FLUSH_MM2S)
@ -2395,6 +2432,7 @@ static int xilinx_dma_chan_probe(struct xilinx_dma_device *xdev,
chan->ctrl_offset = XILINX_DMA_S2MM_CTRL_OFFSET;
if (xdev->dma_config->dmatype == XDMA_TYPE_VDMA) {
chan->desc_offset = XILINX_VDMA_S2MM_DESC_OFFSET;
chan->config.park = 1;
if (xdev->flush_on_fsync == XILINX_DMA_FLUSH_BOTH ||
xdev->flush_on_fsync == XILINX_DMA_FLUSH_S2MM)
@ -2459,7 +2497,8 @@ static int xilinx_dma_chan_probe(struct xilinx_dma_device *xdev,
* Return: 0 always.
*/
static int xilinx_dma_child_probe(struct xilinx_dma_device *xdev,
struct device_node *node) {
struct device_node *node)
{
int ret, i, nr_channels = 1;
ret = of_property_read_u32(node, "dma-channels", &nr_channels);
@ -2654,7 +2693,12 @@ static int xilinx_dma_probe(struct platform_device *pdev)
goto error;
}
dev_info(&pdev->dev, "Xilinx AXI VDMA Engine Driver Probed!!\n");
if (xdev->dma_config->dmatype == XDMA_TYPE_AXIDMA)
dev_info(&pdev->dev, "Xilinx AXI DMA Engine Driver Probed!!\n");
else if (xdev->dma_config->dmatype == XDMA_TYPE_CDMA)
dev_info(&pdev->dev, "Xilinx AXI CDMA Engine Driver Probed!!\n");
else
dev_info(&pdev->dev, "Xilinx AXI VDMA Engine Driver Probed!!\n");
return 0;

179
drivers/dma/xilinx/zynqmp_dma.c
View File

@ -23,6 +23,7 @@
#include <linux/slab.h>
#include <linux/clk.h>
#include <linux/io-64-nonatomic-lo-hi.h>
#include <linux/pm_runtime.h>
#include "../dmaengine.h"
@ -47,6 +48,7 @@
#define ZYNQMP_DMA_SRC_START_MSB 0x15C
#define ZYNQMP_DMA_DST_START_LSB 0x160
#define ZYNQMP_DMA_DST_START_MSB 0x164
#define ZYNQMP_DMA_TOTAL_BYTE 0x188
#define ZYNQMP_DMA_RATE_CTRL 0x18C
#define ZYNQMP_DMA_IRQ_SRC_ACCT 0x190
#define ZYNQMP_DMA_IRQ_DST_ACCT 0x194
@ -138,6 +140,8 @@
#define ZYNQMP_DMA_BUS_WIDTH_64 64
#define ZYNQMP_DMA_BUS_WIDTH_128 128
#define ZDMA_PM_TIMEOUT 100
#define ZYNQMP_DMA_DESC_SIZE(chan) (chan->desc_size)
#define to_chan(chan) container_of(chan, struct zynqmp_dma_chan, \
@ -211,8 +215,6 @@ struct zynqmp_dma_desc_sw {
* @bus_width: Bus width
* @src_burst_len: Source burst length
* @dst_burst_len: Dest burst length
* @clk_main: Pointer to main clock
* @clk_apb: Pointer to apb clock
*/
struct zynqmp_dma_chan {
struct zynqmp_dma_device *zdev;
@ -237,8 +239,6 @@ struct zynqmp_dma_chan {
u32 bus_width;
u32 src_burst_len;
u32 dst_burst_len;
struct clk *clk_main;
struct clk *clk_apb;
};
/**
@ -246,11 +246,15 @@ struct zynqmp_dma_chan {
* @dev: Device Structure
* @common: DMA device structure
* @chan: Driver specific DMA channel
* @clk_main: Pointer to main clock
* @clk_apb: Pointer to apb clock
*/
struct zynqmp_dma_device {
struct device *dev;
struct dma_device common;
struct zynqmp_dma_chan *chan;
struct clk *clk_main;
struct clk *clk_apb;
};
static inline void zynqmp_dma_writeq(struct zynqmp_dma_chan *chan, u32 reg,
@ -461,7 +465,11 @@ static int zynqmp_dma_alloc_chan_resources(struct dma_chan *dchan)
{
struct zynqmp_dma_chan *chan = to_chan(dchan);
struct zynqmp_dma_desc_sw *desc;
int i;
int i, ret;
ret = pm_runtime_get_sync(chan->dev);
if (ret < 0)
return ret;
chan->sw_desc_pool = kzalloc(sizeof(*desc) * ZYNQMP_DMA_NUM_DESCS,
GFP_KERNEL);
@ -506,6 +514,7 @@ static int zynqmp_dma_alloc_chan_resources(struct dma_chan *dchan)
static void zynqmp_dma_start(struct zynqmp_dma_chan *chan)
{
writel(ZYNQMP_DMA_INT_EN_DEFAULT_MASK, chan->regs + ZYNQMP_DMA_IER);
writel(0, chan->regs + ZYNQMP_DMA_TOTAL_BYTE);
chan->idle = false;
writel(ZYNQMP_DMA_ENABLE, chan->regs + ZYNQMP_DMA_CTRL2);
}
@ -517,12 +526,12 @@ static void zynqmp_dma_start(struct zynqmp_dma_chan *chan)
*/
static void zynqmp_dma_handle_ovfl_int(struct zynqmp_dma_chan *chan, u32 status)
{
u32 val;
if (status & ZYNQMP_DMA_BYTE_CNT_OVRFL)
writel(0, chan->regs + ZYNQMP_DMA_TOTAL_BYTE);
if (status & ZYNQMP_DMA_IRQ_DST_ACCT_ERR)
val = readl(chan->regs + ZYNQMP_DMA_IRQ_DST_ACCT);
readl(chan->regs + ZYNQMP_DMA_IRQ_DST_ACCT);
if (status & ZYNQMP_DMA_IRQ_SRC_ACCT_ERR)
val = readl(chan->regs + ZYNQMP_DMA_IRQ_SRC_ACCT);
readl(chan->regs + ZYNQMP_DMA_IRQ_SRC_ACCT);
}
static void zynqmp_dma_config(struct zynqmp_dma_chan *chan)
@ -545,6 +554,8 @@ static void zynqmp_dma_config(struct zynqmp_dma_chan *chan)
* zynqmp_dma_device_config - Zynqmp dma device configuration
* @dchan: DMA channel
* @config: DMA device config
*
* Return: 0 always
*/
static int zynqmp_dma_device_config(struct dma_chan *dchan,
struct dma_slave_config *config)
@ -640,7 +651,7 @@ static void zynqmp_dma_issue_pending(struct dma_chan *dchan)
/**
* zynqmp_dma_free_descriptors - Free channel descriptors
* @dchan: DMA channel pointer
* @chan: ZynqMP DMA channel pointer
*/
static void zynqmp_dma_free_descriptors(struct zynqmp_dma_chan *chan)
{
@ -664,6 +675,8 @@ static void zynqmp_dma_free_chan_resources(struct dma_chan *dchan)
(2 * ZYNQMP_DMA_DESC_SIZE(chan) * ZYNQMP_DMA_NUM_DESCS),
chan->desc_pool_v, chan->desc_pool_p);
kfree(chan->sw_desc_pool);
pm_runtime_mark_last_busy(chan->dev);
pm_runtime_put_autosuspend(chan->dev);
}
/**
@ -715,7 +728,7 @@ static irqreturn_t zynqmp_dma_irq_handler(int irq, void *data)
if (status & ZYNQMP_DMA_INT_OVRFL) {
zynqmp_dma_handle_ovfl_int(chan, status);
dev_info(chan->dev, "Channel %p overflow interrupt\n", chan);
dev_dbg(chan->dev, "Channel %p overflow interrupt\n", chan);
ret = IRQ_HANDLED;
}
@ -838,11 +851,10 @@ static void zynqmp_dma_chan_remove(struct zynqmp_dma_chan *chan)
if (!chan)
return;
devm_free_irq(chan->zdev->dev, chan->irq, chan);
if (chan->irq)
devm_free_irq(chan->zdev->dev, chan->irq, chan);
tasklet_kill(&chan->tasklet);
list_del(&chan->common.device_node);
clk_disable_unprepare(chan->clk_apb);
clk_disable_unprepare(chan->clk_main);
}
/**
@ -907,30 +919,6 @@ static int zynqmp_dma_chan_probe(struct zynqmp_dma_device *zdev,
"zynqmp-dma", chan);
if (err)
return err;
chan->clk_main = devm_clk_get(&pdev->dev, "clk_main");
if (IS_ERR(chan->clk_main)) {
dev_err(&pdev->dev, "main clock not found.\n");
return PTR_ERR(chan->clk_main);
}
chan->clk_apb = devm_clk_get(&pdev->dev, "clk_apb");
if (IS_ERR(chan->clk_apb)) {
dev_err(&pdev->dev, "apb clock not found.\n");
return PTR_ERR(chan->clk_apb);
}
err = clk_prepare_enable(chan->clk_main);
if (err) {
dev_err(&pdev->dev, "Unable to enable main clock.\n");
return err;
}
err = clk_prepare_enable(chan->clk_apb);
if (err) {
clk_disable_unprepare(chan->clk_main);
dev_err(&pdev->dev, "Unable to enable apb clock.\n");
return err;
}
chan->desc_size = sizeof(struct zynqmp_dma_desc_ll);
chan->idle = true;
@ -952,6 +940,87 @@ static struct dma_chan *of_zynqmp_dma_xlate(struct of_phandle_args *dma_spec,
return dma_get_slave_channel(&zdev->chan->common);
}
/**
* zynqmp_dma_suspend - Suspend method for the driver
* @dev: Address of the device structure
*
* Put the driver into low power mode.
* Return: 0 on success and failure value on error
*/
static int __maybe_unused zynqmp_dma_suspend(struct device *dev)
{
if (!device_may_wakeup(dev))
return pm_runtime_force_suspend(dev);
return 0;
}
/**
* zynqmp_dma_resume - Resume from suspend
* @dev: Address of the device structure
*
* Resume operation after suspend.
* Return: 0 on success and failure value on error
*/
static int __maybe_unused zynqmp_dma_resume(struct device *dev)
{
if (!device_may_wakeup(dev))
return pm_runtime_force_resume(dev);
return 0;
}
/**
* zynqmp_dma_runtime_suspend - Runtime suspend method for the driver
* @dev: Address of the device structure
*
* Put the driver into low power mode.
* Return: 0 always
*/
static int __maybe_unused zynqmp_dma_runtime_suspend(struct device *dev)
{
struct zynqmp_dma_device *zdev = dev_get_drvdata(dev);
clk_disable_unprepare(zdev->clk_main);
clk_disable_unprepare(zdev->clk_apb);
return 0;
}
/**
* zynqmp_dma_runtime_resume - Runtime suspend method for the driver
* @dev: Address of the device structure
*
* Put the driver into low power mode.
* Return: 0 always
*/
static int __maybe_unused zynqmp_dma_runtime_resume(struct device *dev)
{
struct zynqmp_dma_device *zdev = dev_get_drvdata(dev);
int err;
err = clk_prepare_enable(zdev->clk_main);
if (err) {
dev_err(dev, "Unable to enable main clock.\n");
return err;
}
err = clk_prepare_enable(zdev->clk_apb);
if (err) {
dev_err(dev, "Unable to enable apb clock.\n");
clk_disable_unprepare(zdev->clk_main);
return err;
}
return 0;
}
static const struct dev_pm_ops zynqmp_dma_dev_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(zynqmp_dma_suspend, zynqmp_dma_resume)
SET_RUNTIME_PM_OPS(zynqmp_dma_runtime_suspend,
zynqmp_dma_runtime_resume, NULL)
};
/**
* zynqmp_dma_probe - Driver probe function
* @pdev: Pointer to the platform_device structure
@ -984,12 +1053,33 @@ static int zynqmp_dma_probe(struct platform_device *pdev)
p->device_config = zynqmp_dma_device_config;
p->dev = &pdev->dev;
zdev->clk_main = devm_clk_get(&pdev->dev, "clk_main");
if (IS_ERR(zdev->clk_main)) {
dev_err(&pdev->dev, "main clock not found.\n");
return PTR_ERR(zdev->clk_main);
}
zdev->clk_apb = devm_clk_get(&pdev->dev, "clk_apb");
if (IS_ERR(zdev->clk_apb)) {
dev_err(&pdev->dev, "apb clock not found.\n");
return PTR_ERR(zdev->clk_apb);
}
platform_set_drvdata(pdev, zdev);
pm_runtime_set_autosuspend_delay(zdev->dev, ZDMA_PM_TIMEOUT);
pm_runtime_use_autosuspend(zdev->dev);
pm_runtime_enable(zdev->dev);
pm_runtime_get_sync(zdev->dev);
if (!pm_runtime_enabled(zdev->dev)) {
ret = zynqmp_dma_runtime_resume(zdev->dev);
if (ret)
return ret;
}
ret = zynqmp_dma_chan_probe(zdev, pdev);
if (ret) {
dev_err(&pdev->dev, "Probing channel failed\n");
goto free_chan_resources;
goto err_disable_pm;
}
p->dst_addr_widths = BIT(zdev->chan->bus_width / 8);
@ -1005,12 +1095,19 @@ static int zynqmp_dma_probe(struct platform_device *pdev)
goto free_chan_resources;
}
pm_runtime_mark_last_busy(zdev->dev);
pm_runtime_put_sync_autosuspend(zdev->dev);
dev_info(&pdev->dev, "ZynqMP DMA driver Probe success\n");
return 0;
free_chan_resources:
zynqmp_dma_chan_remove(zdev->chan);
err_disable_pm:
if (!pm_runtime_enabled(zdev->dev))
zynqmp_dma_runtime_suspend(zdev->dev);
pm_runtime_disable(zdev->dev);
return ret;
}
@ -1028,6 +1125,9 @@ static int zynqmp_dma_remove(struct platform_device *pdev)
dma_async_device_unregister(&zdev->common);
zynqmp_dma_chan_remove(zdev->chan);
pm_runtime_disable(zdev->dev);
if (!pm_runtime_enabled(zdev->dev))
zynqmp_dma_runtime_suspend(zdev->dev);
return 0;
}
@ -1042,6 +1142,7 @@ static struct platform_driver zynqmp_dma_driver = {
.driver = {
.name = "xilinx-zynqmp-dma",
.of_match_table = zynqmp_dma_of_match,
.pm = &zynqmp_dma_dev_pm_ops,
},
.probe = zynqmp_dma_probe,
.remove = zynqmp_dma_remove,

8
drivers/of/property.c
View File

@ -981,10 +981,18 @@ static int of_fwnode_graph_parse_endpoint(const struct fwnode_handle *fwnode,
return 0;
}
static void *
of_fwnode_device_get_match_data(const struct fwnode_handle *fwnode,
const struct device *dev)
{
return (void *)of_device_get_match_data(dev);
}
const struct fwnode_operations of_fwnode_ops = {
.get = of_fwnode_get,
.put = of_fwnode_put,
.device_is_available = of_fwnode_device_is_available,
.device_get_match_data = of_fwnode_device_get_match_data,
.property_present = of_fwnode_property_present,
.property_read_int_array = of_fwnode_property_read_int_array,
.property_read_string_array = of_fwnode_property_read_string_array,

6
include/linux/acpi.h
View File

@ -585,6 +585,7 @@ extern int acpi_nvs_for_each_region(int (*func)(__u64, __u64, void *),
const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids,
const struct device *dev);
void *acpi_get_match_data(const struct device *dev);
extern bool acpi_driver_match_device(struct device *dev,
const struct device_driver *drv);
int acpi_device_uevent_modalias(struct device *, struct kobj_uevent_env *);
@ -762,6 +763,11 @@ static inline const struct acpi_device_id *acpi_match_device(
return NULL;
}
static inline void *acpi_get_match_data(const struct device *dev)
{
return NULL;
}
static inline bool acpi_driver_match_device(struct device *dev,
const struct device_driver *drv)
{

4
include/linux/fwnode.h
View File

@ -15,6 +15,7 @@
#include <linux/types.h>
struct fwnode_operations;
struct device;
struct fwnode_handle {
struct fwnode_handle *secondary;
@ -51,6 +52,7 @@ struct fwnode_reference_args {
* struct fwnode_operations - Operations for fwnode interface
* @get: Get a reference to an fwnode.
* @put: Put a reference to an fwnode.
* @device_get_match_data: Return the device driver match data.
* @property_present: Return true if a property is present.
* @property_read_integer_array: Read an array of integer properties. Return
* zero on success, a negative error code
@ -71,6 +73,8 @@ struct fwnode_operations {
struct fwnode_handle *(*get)(struct fwnode_handle *fwnode);
void (*put)(struct fwnode_handle *fwnode);
bool (*device_is_available)(const struct fwnode_handle *fwnode);
void *(*device_get_match_data)(const struct fwnode_handle *fwnode,
const struct device *dev);
bool (*property_present)(const struct fwnode_handle *fwnode,
const char *propname);
int (*property_read_int_array)(const struct fwnode_handle *fwnode,

2
include/linux/property.h
View File

@ -275,6 +275,8 @@ bool device_dma_supported(struct device *dev);
enum dev_dma_attr device_get_dma_attr(struct device *dev);
void *device_get_match_data(struct device *dev);
int device_get_phy_mode(struct device *dev);
void *device_get_mac_address(struct device *dev, char *addr, int alen);