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dmaengine-4.21-rc1

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dmaengine updates for v4.21-rc1
 
  - New driver for UniPhier MIO DMA controller
  - Remove R-Mobile APE6 support
  - Sprd driver updates and support for cyclic link-list
  - Remove dma_slave_config direction usage from rest of drivers
  - Minor updates to dmatest, dw-dmac, zynqmp and bcm dma drivers
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Merge tag 'dmaengine-4.21-rc1' of git://git.infradead.org/users/vkoul/slave-dma

Pull dmaengine updates from Vinod Koul:
 "This includes a new driver, removes R-Mobile APE6 as it is no longer
  used, sprd cyclic dma support, last batch of dma_slave_config
  direction removal and random updates to bunch of drivers.

  Summary:
   - New driver for UniPhier MIO DMA controller
   - Remove R-Mobile APE6 support
   - Sprd driver updates and support for cyclic link-list
   - Remove dma_slave_config direction usage from rest of drivers
   - Minor updates to dmatest, dw-dmac, zynqmp and bcm dma drivers"

* tag 'dmaengine-4.21-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (48 commits)
  dmaengine: qcom_hidma: convert to DEFINE_SHOW_ATTRIBUTE
  dmaengine: pxa: remove DBGFS_FUNC_DECL()
  dmaengine: mic_x100_dma: convert to DEFINE_SHOW_ATTRIBUTE
  dmaengine: amba-pl08x: convert to DEFINE_SHOW_ATTRIBUTE
  dmaengine: Documentation: Add documentation for multi chan testing
  dmaengine: dmatest: Add transfer_size parameter
  dmaengine: dmatest: Add alignment parameter
  dmaengine: dmatest: Use fixed point div to calculate iops
  dmaengine: dmatest: Add support for multi channel testing
  dmaengine: rcar-dmac: Document R8A774C0 bindings
  dt-bindings: dmaengine: usb-dmac: Add binding for r8a774c0
  dmaengine: zynqmp_dma: replace spin_lock_bh with spin_lock_irqsave
  dmaengine: sprd: Add me as one of the module authors
  dmaengine: sprd: Support DMA 2-stage transfer mode
  dmaengine: sprd: Support DMA link-list cyclic callback
  dmaengine: sprd: Set cur_desc as NULL when free or terminate one dma channel
  dmaengine: sprd: Fix the last link-list configuration
  dmaengine: sprd: Get transfer residue depending on the transfer direction
  dmaengine: sprd: Remove direction usage from struct dma_slave_config
  dmaengine: dmatest: fix a small memory leak in dmatest_func()
  ...
This commit is contained in:
Linus Torvalds 2019-01-01 15:45:48 -08:00
commit 78e8696c23
41 changed files with 2298 additions and 396 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
Documentation/devicetree/bindings/dma/renesas,rcar-dmac.txt
View File

@ -1,6 +1,6 @@
* Renesas R-Car (RZ/G) DMA Controller Device Tree bindings
Renesas R-Car Generation 2 SoCs have multiple multi-channel DMA
Renesas R-Car (Gen 2/3) and RZ/G SoCs have multiple multi-channel DMA
controller instances named DMAC capable of serving multiple clients. Channels
can be dedicated to specific clients or shared between a large number of
clients.
@ -20,6 +20,8 @@ Required Properties:
- "renesas,dmac-r8a7744" (RZ/G1N)
- "renesas,dmac-r8a7745" (RZ/G1E)
- "renesas,dmac-r8a77470" (RZ/G1C)
- "renesas,dmac-r8a774a1" (RZ/G2M)
- "renesas,dmac-r8a774c0" (RZ/G2E)
- "renesas,dmac-r8a7790" (R-Car H2)
- "renesas,dmac-r8a7791" (R-Car M2-W)
- "renesas,dmac-r8a7792" (R-Car V2H)

3
Documentation/devicetree/bindings/dma/renesas,usb-dmac.txt
View File

@ -6,6 +6,9 @@ Required Properties:
- "renesas,r8a7743-usb-dmac" (RZ/G1M)
- "renesas,r8a7744-usb-dmac" (RZ/G1N)
- "renesas,r8a7745-usb-dmac" (RZ/G1E)
- "renesas,r8a77470-usb-dmac" (RZ/G1C)
- "renesas,r8a774a1-usb-dmac" (RZ/G2M)
- "renesas,r8a774c0-usb-dmac" (RZ/G2E)
- "renesas,r8a7790-usb-dmac" (R-Car H2)
- "renesas,r8a7791-usb-dmac" (R-Car M2-W)
- "renesas,r8a7793-usb-dmac" (R-Car M2-N)

4
Documentation/devicetree/bindings/dma/snps-dma.txt
View File

@ -27,6 +27,10 @@ Optional properties:
general purpose DMA channel allocator. False if not passed.
- multi-block: Multi block transfers supported by hardware. Array property with
one cell per channel. 0: not supported, 1 (default): supported.
- snps,dma-protection-control: AHB HPROT[3:1] protection setting.
The default value is 0 (for non-cacheable, non-buffered,
unprivileged data access).
Refer to include/dt-bindings/dma/dw-dmac.h for possible values.
Example:

25
Documentation/devicetree/bindings/dma/uniphier-mio-dmac.txt Normal file
View File

@ -0,0 +1,25 @@
UniPhier Media IO DMA controller
This works as an external DMA engine for SD/eMMC controllers etc.
found in UniPhier LD4, Pro4, sLD8 SoCs.
Required properties:
- compatible: should be "socionext,uniphier-mio-dmac".
- reg: offset and length of the register set for the device.
- interrupts: a list of interrupt specifiers associated with the DMA channels.
- clocks: a single clock specifier.
- #dma-cells: should be <1>. The single cell represents the channel index.
Example:
dmac: dma-controller@5a000000 {
compatible = "socionext,uniphier-mio-dmac";
reg = <0x5a000000 0x1000>;
interrupts = <0 68 4>, <0 68 4>, <0 69 4>, <0 70 4>,
<0 71 4>, <0 72 4>, <0 73 4>, <0 74 4>;
clocks = <&mio_clk 7>;
#dma-cells = <1>;
};
Note:
In the example above, "interrupts = <0 68 4>, <0 68 4>, ..." is not a typo.
The first two channels share a single interrupt line.

109
Documentation/driver-api/dmaengine/dmatest.rst
View File

@ -30,28 +30,43 @@ Part 2 - When dmatest is built as a module
Example of usage::
% modprobe dmatest channel=dma0chan0 timeout=2000 iterations=1 run=1
% modprobe dmatest timeout=2000 iterations=1 channel=dma0chan0 run=1
...or::
% modprobe dmatest
% echo dma0chan0 > /sys/module/dmatest/parameters/channel
% echo 2000 > /sys/module/dmatest/parameters/timeout
% echo 1 > /sys/module/dmatest/parameters/iterations
% echo dma0chan0 > /sys/module/dmatest/parameters/channel
% echo 1 > /sys/module/dmatest/parameters/run
...or on the kernel command line::
dmatest.channel=dma0chan0 dmatest.timeout=2000 dmatest.iterations=1 dmatest.run=1
dmatest.timeout=2000 dmatest.iterations=1 dmatest.channel=dma0chan0 dmatest.run=1
Example of multi-channel test usage:
% modprobe dmatest
% echo 2000 > /sys/module/dmatest/parameters/timeout
% echo 1 > /sys/module/dmatest/parameters/iterations
% echo dma0chan0 > /sys/module/dmatest/parameters/channel
% echo dma0chan1 > /sys/module/dmatest/parameters/channel
% echo dma0chan2 > /sys/module/dmatest/parameters/channel
% echo 1 > /sys/module/dmatest/parameters/run
Note: the channel parameter should always be the last parameter set prior to
running the test (setting run=1), this is because upon setting the channel
parameter, that specific channel is requested using the dmaengine and a thread
is created with the existing parameters. This thread is set as pending
and will be executed once run is set to 1. Any parameters set after the thread
is created are not applied.
.. hint::
available channel list could be extracted by running the following command::
% ls -1 /sys/class/dma/
Once started a message like "dmatest: Started 1 threads using dma0chan0" is
emitted. After that only test failure messages are reported until the test
stops.
Once started a message like " dmatest: Added 1 threads using dma0chan0" is
emitted. A thread for that specific channel is created and is now pending, the
pending thread is started once run is to 1.
Note that running a new test will not stop any in progress test.
@ -116,3 +131,85 @@ Example::
The details of a data miscompare error are also emitted, but do not follow the
above format.
Part 5 - Handling channel allocation
====================================
Allocating Channels
-------------------
Channels are required to be configured prior to starting the test run.
Attempting to run the test without configuring the channels will fail.
Example::
% echo 1 > /sys/module/dmatest/parameters/run
dmatest: Could not start test, no channels configured
Channels are registered using the "channel" parameter. Channels can be requested by their
name, once requested, the channel is registered and a pending thread is added to the test list.
Example::
% echo dma0chan2 > /sys/module/dmatest/parameters/channel
dmatest: Added 1 threads using dma0chan2
More channels can be added by repeating the example above.
Reading back the channel parameter will return the name of last channel that was added successfully.
Example::
% echo dma0chan1 > /sys/module/dmatest/parameters/channel
dmatest: Added 1 threads using dma0chan1
% echo dma0chan2 > /sys/module/dmatest/parameters/channel
dmatest: Added 1 threads using dma0chan2
% cat /sys/module/dmatest/parameters/channel
dma0chan2
Another method of requesting channels is to request a channel with an empty string, Doing so
will request all channels available to be tested:
Example::
% echo "" > /sys/module/dmatest/parameters/channel
dmatest: Added 1 threads using dma0chan0
dmatest: Added 1 threads using dma0chan3
dmatest: Added 1 threads using dma0chan4
dmatest: Added 1 threads using dma0chan5
dmatest: Added 1 threads using dma0chan6
dmatest: Added 1 threads using dma0chan7
dmatest: Added 1 threads using dma0chan8
At any point during the test configuration, reading the "test_list" parameter will
print the list of currently pending tests.
Example::
% cat /sys/module/dmatest/parameters/test_list
dmatest: 1 threads using dma0chan0
dmatest: 1 threads using dma0chan3
dmatest: 1 threads using dma0chan4
dmatest: 1 threads using dma0chan5
dmatest: 1 threads using dma0chan6
dmatest: 1 threads using dma0chan7
dmatest: 1 threads using dma0chan8
Note: Channels will have to be configured for each test run as channel configurations do not
carry across to the next test run.
Releasing Channels
-------------------
Channels can be freed by setting run to 0.
Example::
% echo dma0chan1 > /sys/module/dmatest/parameters/channel
dmatest: Added 1 threads using dma0chan1
% cat /sys/class/dma/dma0chan1/in_use
1
% echo 0 > /sys/module/dmatest/parameters/run
% cat /sys/class/dma/dma0chan1/in_use
0
Channels allocated by previous test runs are automatically freed when a new
channel is requested after completing a successful test run.

5
MAINTAINERS
View File

@ -2279,6 +2279,7 @@ F: arch/arm/mm/cache-uniphier.c
F: arch/arm64/boot/dts/socionext/uniphier*
F: drivers/bus/uniphier-system-bus.c
F: drivers/clk/uniphier/
F: drivers/dmaengine/uniphier-mdmac.c
F: drivers/gpio/gpio-uniphier.c
F: drivers/i2c/busses/i2c-uniphier*
F: drivers/irqchip/irq-uniphier-aidet.c
@ -14628,9 +14629,11 @@ SYNOPSYS DESIGNWARE DMAC DRIVER
M: Viresh Kumar <vireshk@kernel.org>
R: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
S: Maintained
F: Documentation/devicetree/bindings/dma/snps-dma.txt
F: drivers/dma/dw/
F: include/dt-bindings/dma/dw-dmac.h
F: include/linux/dma/dw.h
F: include/linux/platform_data/dma-dw.h
F: drivers/dma/dw/
SYNOPSYS DESIGNWARE ENTERPRISE ETHERNET DRIVER
M: Jose Abreu <Jose.Abreu@synopsys.com>

11
drivers/dma/Kconfig
View File

@ -587,6 +587,17 @@ config TIMB_DMA
help
Enable support for the Timberdale FPGA DMA engine.
config UNIPHIER_MDMAC
tristate "UniPhier MIO DMAC"
depends on ARCH_UNIPHIER || COMPILE_TEST
depends on OF
select DMA_ENGINE
select DMA_VIRTUAL_CHANNELS
help
Enable support for the MIO DMAC (Media I/O DMA controller) on the
UniPhier platform. This DMA controller is used as the external
DMA engine of the SD/eMMC controllers of the LD4, Pro4, sLD8 SoCs.
config XGENE_DMA
tristate "APM X-Gene DMA support"
depends on ARCH_XGENE || COMPILE_TEST

1
drivers/dma/Makefile
View File

@ -70,6 +70,7 @@ obj-$(CONFIG_TXX9_DMAC) += txx9dmac.o
obj-$(CONFIG_TEGRA20_APB_DMA) += tegra20-apb-dma.o
obj-$(CONFIG_TEGRA210_ADMA) += tegra210-adma.o
obj-$(CONFIG_TIMB_DMA) += timb_dma.o
obj-$(CONFIG_UNIPHIER_MDMAC) += uniphier-mdmac.o
obj-$(CONFIG_XGENE_DMA) += xgene-dma.o
obj-$(CONFIG_ZX_DMA) += zx_dma.o
obj-$(CONFIG_ST_FDMA) += st_fdma.o

14
drivers/dma/amba-pl08x.c
View File

@ -2505,24 +2505,14 @@ static int pl08x_debugfs_show(struct seq_file *s, void *data)
return 0;
}
static int pl08x_debugfs_open(struct inode *inode, struct file *file)
{
return single_open(file, pl08x_debugfs_show, inode->i_private);
}
static const struct file_operations pl08x_debugfs_operations = {
.open = pl08x_debugfs_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
DEFINE_SHOW_ATTRIBUTE(pl08x_debugfs);
static void init_pl08x_debugfs(struct pl08x_driver_data *pl08x)
{
/* Expose a simple debugfs interface to view all clocks */
(void) debugfs_create_file(dev_name(&pl08x->adev->dev),
S_IFREG | S_IRUGO, NULL, pl08x,
&pl08x_debugfs_operations);
&pl08x_debugfs_fops);
}
#else

13
drivers/dma/bcm2835-dma.c
View File

@ -1,3 +1,4 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* BCM2835 DMA engine support
*
@ -18,16 +19,6 @@
*
* MARVELL MMP Peripheral DMA Driver
* Copyright 2012 Marvell International Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/dmaengine.h>
#include <linux/dma-mapping.h>
@ -1056,4 +1047,4 @@ module_platform_driver(bcm2835_dma_driver);
MODULE_ALIAS("platform:bcm2835-dma");
MODULE_DESCRIPTION("BCM2835 DMA engine driver");
MODULE_AUTHOR("Florian Meier <florian.meier@koalo.de>");
MODULE_LICENSE("GPL v2");
MODULE_LICENSE("GPL");

5
drivers/dma/coh901318.c
View File

@ -1802,13 +1802,10 @@ static struct dma_chan *coh901318_xlate(struct of_phandle_args *dma_spec,
static int coh901318_config(struct coh901318_chan *cohc,
struct coh901318_params *param)
{
unsigned long flags;
const struct coh901318_params *p;
int channel = cohc->id;
void __iomem *virtbase = cohc->base->virtbase;
spin_lock_irqsave(&cohc->lock, flags);
if (param)
p = param;
else
@ -1828,8 +1825,6 @@ static int coh901318_config(struct coh901318_chan *cohc,
coh901318_set_conf(cohc, p->config);
coh901318_set_ctrl(cohc, p->ctrl_lli_last);
spin_unlock_irqrestore(&cohc->lock, flags);
return 0;
}

303
drivers/dma/dmatest.c
View File

@ -27,11 +27,6 @@ static unsigned int test_buf_size = 16384;
module_param(test_buf_size, uint, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(test_buf_size, "Size of the memcpy test buffer");
static char test_channel[20];
module_param_string(channel, test_channel, sizeof(test_channel),
S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(channel, "Bus ID of the channel to test (default: any)");
static char test_device[32];
module_param_string(device, test_device, sizeof(test_device),
S_IRUGO | S_IWUSR);
@ -84,6 +79,14 @@ static bool verbose;
module_param(verbose, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(verbose, "Enable \"success\" result messages (default: off)");
static int alignment = -1;
module_param(alignment, int, 0644);
MODULE_PARM_DESC(alignment, "Custom data address alignment taken as 2^(alignment) (default: not used (-1))");
static unsigned int transfer_size;
module_param(transfer_size, uint, 0644);
MODULE_PARM_DESC(transfer_size, "Optional custom transfer size in bytes (default: not used (0))");
/**
* struct dmatest_params - test parameters.
* @buf_size: size of the memcpy test buffer
@ -108,6 +111,8 @@ struct dmatest_params {
int timeout;
bool noverify;
bool norandom;
int alignment;
unsigned int transfer_size;
};
/**
@ -139,6 +144,28 @@ static bool dmatest_run;
module_param_cb(run, &run_ops, &dmatest_run, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(run, "Run the test (default: false)");
static int dmatest_chan_set(const char *val, const struct kernel_param *kp);
static int dmatest_chan_get(char *val, const struct kernel_param *kp);
static const struct kernel_param_ops multi_chan_ops = {
.set = dmatest_chan_set,
.get = dmatest_chan_get,
};
static char test_channel[20];
static struct kparam_string newchan_kps = {
.string = test_channel,
.maxlen = 20,
};
module_param_cb(channel, &multi_chan_ops, &newchan_kps, 0644);
MODULE_PARM_DESC(channel, "Bus ID of the channel to test (default: any)");
static int dmatest_test_list_get(char *val, const struct kernel_param *kp);
static const struct kernel_param_ops test_list_ops = {
.get = dmatest_test_list_get,
};
module_param_cb(test_list, &test_list_ops, NULL, 0444);
MODULE_PARM_DESC(test_list, "Print current test list");
/* Maximum amount of mismatched bytes in buffer to print */
#define MAX_ERROR_COUNT 32
@ -160,6 +187,13 @@ MODULE_PARM_DESC(run, "Run the test (default: false)");
#define PATTERN_COUNT_MASK 0x1f
#define PATTERN_MEMSET_IDX 0x01
/* Fixed point arithmetic ops */
#define FIXPT_SHIFT 8
#define FIXPNT_MASK 0xFF
#define FIXPT_TO_INT(a) ((a) >> FIXPT_SHIFT)
#define INT_TO_FIXPT(a) ((a) << FIXPT_SHIFT)
#define FIXPT_GET_FRAC(a) ((((a) & FIXPNT_MASK) * 100) >> FIXPT_SHIFT)
/* poor man's completion - we want to use wait_event_freezable() on it */
struct dmatest_done {
bool done;
@ -179,6 +213,7 @@ struct dmatest_thread {
wait_queue_head_t done_wait;
struct dmatest_done test_done;
bool done;
bool pending;
};
struct dmatest_chan {
@ -206,6 +241,22 @@ static bool is_threaded_test_run(struct dmatest_info *info)
return false;
}
static bool is_threaded_test_pending(struct dmatest_info *info)
{
struct dmatest_chan *dtc;
list_for_each_entry(dtc, &info->channels, node) {
struct dmatest_thread *thread;
list_for_each_entry(thread, &dtc->threads, node) {
if (thread->pending)
return true;
}
}
return false;
}
static int dmatest_wait_get(char *val, const struct kernel_param *kp)
{
struct dmatest_info *info = &test_info;
@ -419,13 +470,15 @@ static unsigned long long dmatest_persec(s64 runtime, unsigned int val)
}
per_sec *= val;
per_sec = INT_TO_FIXPT(per_sec);
do_div(per_sec, runtime);
return per_sec;
}
static unsigned long long dmatest_KBs(s64 runtime, unsigned long long len)
{
return dmatest_persec(runtime, len >> 10);
return FIXPT_TO_INT(dmatest_persec(runtime, len >> 10));
}
/*
@ -466,6 +519,7 @@ static int dmatest_func(void *data)
ktime_t comparetime = 0;
s64 runtime = 0;
unsigned long long total_len = 0;
unsigned long long iops = 0;
u8 align = 0;
bool is_memset = false;
dma_addr_t *srcs;
@ -476,27 +530,32 @@ static int dmatest_func(void *data)
ret = -ENOMEM;
smp_rmb();
thread->pending = false;
info = thread->info;
params = &info->params;
chan = thread->chan;
dev = chan->device;
if (thread->type == DMA_MEMCPY) {
align = dev->copy_align;
align = params->alignment < 0 ? dev->copy_align :
params->alignment;
src_cnt = dst_cnt = 1;
} else if (thread->type == DMA_MEMSET) {
align = dev->fill_align;
align = params->alignment < 0 ? dev->fill_align :
params->alignment;
src_cnt = dst_cnt = 1;
is_memset = true;
} else if (thread->type == DMA_XOR) {
/* force odd to ensure dst = src */
src_cnt = min_odd(params->xor_sources | 1, dev->max_xor);
dst_cnt = 1;
align = dev->xor_align;
align = params->alignment < 0 ? dev->xor_align :
params->alignment;
} else if (thread->type == DMA_PQ) {
/* force odd to ensure dst = src */
src_cnt = min_odd(params->pq_sources | 1, dma_maxpq(dev, 0));
dst_cnt = 2;
align = dev->pq_align;
align = params->alignment < 0 ? dev->pq_align :
params->alignment;
pq_coefs = kmalloc(params->pq_sources + 1, GFP_KERNEL);
if (!pq_coefs)
@ -507,9 +566,22 @@ static int dmatest_func(void *data)
} else
goto err_thread_type;
/* Check if buffer count fits into map count variable (u8) */
if ((src_cnt + dst_cnt) >= 255) {
pr_err("too many buffers (%d of 255 supported)\n",
src_cnt + dst_cnt);
goto err_free_coefs;
}
if (1 << align > params->buf_size) {
pr_err("%u-byte buffer too small for %d-byte alignment\n",
params->buf_size, 1 << align);
goto err_free_coefs;
}
thread->srcs = kcalloc(src_cnt + 1, sizeof(u8 *), GFP_KERNEL);
if (!thread->srcs)
goto err_srcs;
goto err_free_coefs;
thread->usrcs = kcalloc(src_cnt + 1, sizeof(u8 *), GFP_KERNEL);
if (!thread->usrcs)
@ -576,28 +648,25 @@ static int dmatest_func(void *data)
total_tests++;
/* Check if buffer count fits into map count variable (u8) */
if ((src_cnt + dst_cnt) >= 255) {
pr_err("too many buffers (%d of 255 supported)\n",
src_cnt + dst_cnt);
break;
}
if (1 << align > params->buf_size) {
pr_err("%u-byte buffer too small for %d-byte alignment\n",
params->buf_size, 1 << align);
break;
}
if (params->norandom)
if (params->transfer_size) {
if (params->transfer_size >= params->buf_size) {
pr_err("%u-byte transfer size must be lower than %u-buffer size\n",
params->transfer_size, params->buf_size);
break;
}
len = params->transfer_size;
} else if (params->norandom) {
len = params->buf_size;
else
} else {
len = dmatest_random() % params->buf_size + 1;
}
len = (len >> align) << align;
if (!len)
len = 1 << align;
/* Do not alter transfer size explicitly defined by user */
if (!params->transfer_size) {
len = (len >> align) << align;
if (!len)
len = 1 << align;
}
total_len += len;
if (params->norandom) {
@ -721,14 +790,14 @@ static int dmatest_func(void *data)
status = dma_async_is_tx_complete(chan, cookie, NULL, NULL);
dmaengine_unmap_put(um);
if (!done->done) {
dmaengine_unmap_put(um);
result("test timed out", total_tests, src_off, dst_off,
len, 0);
failed_tests++;
continue;
} else if (status != DMA_COMPLETE) {
dmaengine_unmap_put(um);
result(status == DMA_ERROR ?
"completion error status" :
"completion busy status", total_tests, src_off,
@ -737,8 +806,6 @@ static int dmatest_func(void *data)
continue;
}
dmaengine_unmap_put(um);
if (params->noverify) {
verbose_result("test passed", total_tests, src_off,
dst_off, len, 0);
@ -802,17 +869,18 @@ err_srcbuf:
kfree(thread->usrcs);
err_usrcs:
kfree(thread->srcs);
err_srcs:
err_free_coefs:
kfree(pq_coefs);
err_thread_type:
pr_info("%s: summary %u tests, %u failures %llu iops %llu KB/s (%d)\n",
iops = dmatest_persec(runtime, total_tests);
pr_info("%s: summary %u tests, %u failures %llu.%02llu iops %llu KB/s (%d)\n",
current->comm, total_tests, failed_tests,
dmatest_persec(runtime, total_tests),
FIXPT_TO_INT(iops), FIXPT_GET_FRAC(iops),
dmatest_KBs(runtime, total_len), ret);
/* terminate all transfers on specified channels */
if (ret || failed_tests)
dmaengine_terminate_all(chan);
dmaengine_terminate_sync(chan);
thread->done = true;
wake_up(&thread_wait);
@ -836,7 +904,7 @@ static void dmatest_cleanup_channel(struct dmatest_chan *dtc)
}
/* terminate all transfers on specified channels */
dmaengine_terminate_all(dtc->chan);
dmaengine_terminate_sync(dtc->chan);
kfree(dtc);
}
@ -886,7 +954,7 @@ static int dmatest_add_threads(struct dmatest_info *info,
/* srcbuf and dstbuf are allocated by the thread itself */
get_task_struct(thread->task);
list_add_tail(&thread->node, &dtc->threads);
wake_up_process(thread->task);
thread->pending = true;
}
return i;
@ -932,7 +1000,7 @@ static int dmatest_add_channel(struct dmatest_info *info,
thread_count += cnt > 0 ? cnt : 0;
}
pr_info("Started %u threads using %s\n",
pr_info("Added %u threads using %s\n",
thread_count, dma_chan_name(chan));
list_add_tail(&dtc->node, &info->channels);
@ -977,7 +1045,7 @@ static void request_channels(struct dmatest_info *info,
}
}
static void run_threaded_test(struct dmatest_info *info)
static void add_threaded_test(struct dmatest_info *info)
{
struct dmatest_params *params = &info->params;
@ -993,6 +1061,8 @@ static void run_threaded_test(struct dmatest_info *info)
params->timeout = timeout;
params->noverify = noverify;
params->norandom = norandom;
params->alignment = alignment;
params->transfer_size = transfer_size;
request_channels(info, DMA_MEMCPY);
request_channels(info, DMA_MEMSET);
@ -1000,6 +1070,24 @@ static void run_threaded_test(struct dmatest_info *info)
request_channels(info, DMA_PQ);
}
static void run_pending_tests(struct dmatest_info *info)
{
struct dmatest_chan *dtc;
unsigned int thread_count = 0;
list_for_each_entry(dtc, &info->channels, node) {
struct dmatest_thread *thread;
thread_count = 0;
list_for_each_entry(thread, &dtc->threads, node) {
wake_up_process(thread->task);
thread_count++;
}
pr_info("Started %u threads using %s\n",
thread_count, dma_chan_name(dtc->chan));
}
}
static void stop_threaded_test(struct dmatest_info *info)
{
struct dmatest_chan *dtc, *_dtc;
@ -1016,7 +1104,7 @@ static void stop_threaded_test(struct dmatest_info *info)
info->nr_channels = 0;
}
static void restart_threaded_test(struct dmatest_info *info, bool run)
static void start_threaded_tests(struct dmatest_info *info)
{
/* we might be called early to set run=, defer running until all
* parameters have been evaluated
@ -1024,11 +1112,7 @@ static void restart_threaded_test(struct dmatest_info *info, bool run)
if (!info->did_init)
return;
/* Stop any running test first */
stop_threaded_test(info);
/* Run test with new parameters */
run_threaded_test(info);
run_pending_tests(info);
}
static int dmatest_run_get(char *val, const struct kernel_param *kp)
@ -1039,7 +1123,8 @@ static int dmatest_run_get(char *val, const struct kernel_param *kp)
if (is_threaded_test_run(info)) {
dmatest_run = true;
} else {
stop_threaded_test(info);
if (!is_threaded_test_pending(info))
stop_threaded_test(info);
dmatest_run = false;
}
mutex_unlock(&info->lock);
@ -1057,18 +1142,125 @@ static int dmatest_run_set(const char *val, const struct kernel_param *kp)
if (ret) {
mutex_unlock(&info->lock);
return ret;
} else if (dmatest_run) {
if (is_threaded_test_pending(info))
start_threaded_tests(info);
else
pr_info("Could not start test, no channels configured\n");
} else {
stop_threaded_test(info);
}
if (is_threaded_test_run(info))
ret = -EBUSY;
else if (dmatest_run)
restart_threaded_test(info, dmatest_run);
mutex_unlock(&info->lock);
return ret;
}
static int dmatest_chan_set(const char *val, const struct kernel_param *kp)
{
struct dmatest_info *info = &test_info;
struct dmatest_chan *dtc;
char chan_reset_val[20];
int ret = 0;
mutex_lock(&info->lock);
ret = param_set_copystring(val, kp);
if (ret) {
mutex_unlock(&info->lock);
return ret;
}
/*Clear any previously run threads */
if (!is_threaded_test_run(info) && !is_threaded_test_pending(info))
stop_threaded_test(info);
/* Reject channels that are already registered */
if (is_threaded_test_pending(info)) {
list_for_each_entry(dtc, &info->channels, node) {
if (strcmp(dma_chan_name(dtc->chan),
strim(test_channel)) == 0) {
dtc = list_last_entry(&info->channels,
struct dmatest_chan,
node);
strlcpy(chan_reset_val,
dma_chan_name(dtc->chan),
sizeof(chan_reset_val));
ret = -EBUSY;
goto add_chan_err;
}
}
}
add_threaded_test(info);
/* Check if channel was added successfully */
dtc = list_last_entry(&info->channels, struct dmatest_chan, node);
if (dtc->chan) {
/*
* if new channel was not successfully added, revert the
* "test_channel" string to the name of the last successfully
* added channel. exception for when users issues empty string
* to channel parameter.
*/
if ((strcmp(dma_chan_name(dtc->chan), strim(test_channel)) != 0)
&& (strcmp("", strim(test_channel)) != 0)) {
ret = -EINVAL;
strlcpy(chan_reset_val, dma_chan_name(dtc->chan),
sizeof(chan_reset_val));
goto add_chan_err;
}
} else {
/* Clear test_channel if no channels were added successfully */
strlcpy(chan_reset_val, "", sizeof(chan_reset_val));
ret = -EBUSY;
goto add_chan_err;
}
mutex_unlock(&info->lock);
return ret;
add_chan_err:
param_set_copystring(chan_reset_val, kp);
mutex_unlock(&info->lock);
return ret;
}
static int dmatest_chan_get(char *val, const struct kernel_param *kp)
{
struct dmatest_info *info = &test_info;
mutex_lock(&info->lock);
if (!is_threaded_test_run(info) && !is_threaded_test_pending(info)) {
stop_threaded_test(info);
strlcpy(test_channel, "", sizeof(test_channel));
}
mutex_unlock(&info->lock);
return param_get_string(val, kp);
}
static int dmatest_test_list_get(char *val, const struct kernel_param *kp)
{
struct dmatest_info *info = &test_info;
struct dmatest_chan *dtc;
unsigned int thread_count = 0;
list_for_each_entry(dtc, &info->channels, node) {
struct dmatest_thread *thread;
thread_count = 0;
list_for_each_entry(thread, &dtc->threads, node) {
thread_count++;
}
pr_info("%u threads using %s\n",
thread_count, dma_chan_name(dtc->chan));
}
return 0;
}
static int __init dmatest_init(void)
{
struct dmatest_info *info = &test_info;
@ -1076,7 +1268,8 @@ static int __init dmatest_init(void)
if (dmatest_run) {
mutex_lock(&info->lock);
run_threaded_test(info);
add_threaded_test(info);
run_pending_tests(info);
mutex_unlock(&info->lock);
}

2
drivers/dma/dw/core.c
View File

@ -160,12 +160,14 @@ static void dwc_initialize_chan_idma32(struct dw_dma_chan *dwc)
static void dwc_initialize_chan_dw(struct dw_dma_chan *dwc)
{
struct dw_dma *dw = to_dw_dma(dwc->chan.device);
u32 cfghi = DWC_CFGH_FIFO_MODE;
u32 cfglo = DWC_CFGL_CH_PRIOR(dwc->priority);
bool hs_polarity = dwc->dws.hs_polarity;
cfghi |= DWC_CFGH_DST_PER(dwc->dws.dst_id);
cfghi |= DWC_CFGH_SRC_PER(dwc->dws.src_id);
cfghi |= DWC_CFGH_PROTCTL(dw->pdata->protctl);
/* Set polarity of handshake interface */
cfglo |= hs_polarity ? DWC_CFGL_HS_DST_POL | DWC_CFGL_HS_SRC_POL : 0;

6
drivers/dma/dw/platform.c
View File

@ -162,6 +162,12 @@ dw_dma_parse_dt(struct platform_device *pdev)
pdata->multi_block[tmp] = 1;
}
if (!of_property_read_u32(np, "snps,dma-protection-control", &tmp)) {
if (tmp > CHAN_PROTCTL_MASK)
return NULL;
pdata->protctl = tmp;
}
return pdata;
}
#else

4
drivers/dma/dw/regs.h
View File

@ -200,6 +200,10 @@ enum dw_dma_msize {
#define DWC_CFGH_FCMODE (1 << 0)
#define DWC_CFGH_FIFO_MODE (1 << 1)
#define DWC_CFGH_PROTCTL(x) ((x) << 2)
#define DWC_CFGH_PROTCTL_DATA (0 << 2) /* data access - always set */
#define DWC_CFGH_PROTCTL_PRIV (1 << 2) /* privileged -> AHB HPROT[1] */
#define DWC_CFGH_PROTCTL_BUFFER (2 << 2) /* bufferable -> AHB HPROT[2] */
#define DWC_CFGH_PROTCTL_CACHE (4 << 2) /* cacheable -> AHB HPROT[3] */
#define DWC_CFGH_DS_UPD_EN (1 << 5)
#define DWC_CFGH_SS_UPD_EN (1 << 6)
#define DWC_CFGH_SRC_PER(x) ((x) << 7)

6
drivers/dma/ep93xx_dma.c
View File

@ -997,7 +997,7 @@ ep93xx_dma_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest,
for (offset = 0; offset < len; offset += bytes) {
desc = ep93xx_dma_desc_get(edmac);
if (!desc) {
dev_warn(chan2dev(edmac), "couln't get descriptor\n");
dev_warn(chan2dev(edmac), "couldn't get descriptor\n");
goto fail;
}
@ -1069,7 +1069,7 @@ ep93xx_dma_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
desc = ep93xx_dma_desc_get(edmac);
if (!desc) {
dev_warn(chan2dev(edmac), "couln't get descriptor\n");
dev_warn(chan2dev(edmac), "couldn't get descriptor\n");
goto fail;
}
@ -1149,7 +1149,7 @@ ep93xx_dma_prep_dma_cyclic(struct dma_chan *chan, dma_addr_t dma_addr,
for (offset = 0; offset < buf_len; offset += period_len) {
desc = ep93xx_dma_desc_get(edmac);
if (!desc) {
dev_warn(chan2dev(edmac), "couln't get descriptor\n");
dev_warn(chan2dev(edmac), "couldn't get descriptor\n");
goto fail;
}

60
drivers/dma/imx-sdma.c
View File

@ -335,6 +335,7 @@ struct sdma_desc {
* @sdma: pointer to the SDMA engine for this channel
* @channel: the channel number, matches dmaengine chan_id + 1
* @direction: transfer type. Needed for setting SDMA script
* @slave_config Slave configuration
* @peripheral_type: Peripheral type. Needed for setting SDMA script
* @event_id0: aka dma request line
* @event_id1: for channels that use 2 events
@ -362,6 +363,7 @@ struct sdma_channel {
struct sdma_engine *sdma;
unsigned int channel;
enum dma_transfer_direction direction;
struct dma_slave_config slave_config;
enum sdma_peripheral_type peripheral_type;
unsigned int event_id0;
unsigned int event_id1;
@ -440,6 +442,10 @@ struct sdma_engine {
struct sdma_buffer_descriptor *bd0;
};
static int sdma_config_write(struct dma_chan *chan,
struct dma_slave_config *dmaengine_cfg,
enum dma_transfer_direction direction);
static struct sdma_driver_data sdma_imx31 = {
.chnenbl0 = SDMA_CHNENBL0_IMX31,
.num_events = 32,
@ -671,9 +677,7 @@ static int sdma_load_script(struct sdma_engine *sdma, void *buf, int size,
int ret;
unsigned long flags;
buf_virt = dma_alloc_coherent(NULL,
size,
&buf_phys, GFP_KERNEL);
buf_virt = dma_alloc_coherent(NULL, size, &buf_phys, GFP_KERNEL);
if (!buf_virt) {
return -ENOMEM;
}
@ -1122,18 +1126,6 @@ static int sdma_config_channel(struct dma_chan *chan)
sdmac->shp_addr = 0;
sdmac->per_addr = 0;
if (sdmac->event_id0) {
if (sdmac->event_id0 >= sdmac->sdma->drvdata->num_events)
return -EINVAL;
sdma_event_enable(sdmac, sdmac->event_id0);
}
if (sdmac->event_id1) {
if (sdmac->event_id1 >= sdmac->sdma->drvdata->num_events)
return -EINVAL;
sdma_event_enable(sdmac, sdmac->event_id1);
}
switch (sdmac->peripheral_type) {
case IMX_DMATYPE_DSP:
sdma_config_ownership(sdmac, false, true, true);
@ -1431,6 +1423,8 @@ static struct dma_async_tx_descriptor *sdma_prep_slave_sg(
struct scatterlist *sg;
struct sdma_desc *desc;
sdma_config_write(chan, &sdmac->slave_config, direction);
desc = sdma_transfer_init(sdmac, direction, sg_len);
if (!desc)
goto err_out;
@ -1515,6 +1509,8 @@ static struct dma_async_tx_descriptor *sdma_prep_dma_cyclic(
dev_dbg(sdma->dev, "%s channel: %d\n", __func__, channel);
sdma_config_write(chan, &sdmac->slave_config, direction);
desc = sdma_transfer_init(sdmac, direction, num_periods);
if (!desc)
goto err_out;
@ -1570,17 +1566,18 @@ err_out:
return NULL;
}
static int sdma_config(struct dma_chan *chan,
struct dma_slave_config *dmaengine_cfg)
static int sdma_config_write(struct dma_chan *chan,
struct dma_slave_config *dmaengine_cfg,
enum dma_transfer_direction direction)
{
struct sdma_channel *sdmac = to_sdma_chan(chan);
if (dmaengine_cfg->direction == DMA_DEV_TO_MEM) {
if (direction == DMA_DEV_TO_MEM) {
sdmac->per_address = dmaengine_cfg->src_addr;
sdmac->watermark_level = dmaengine_cfg->src_maxburst *
dmaengine_cfg->src_addr_width;
sdmac->word_size = dmaengine_cfg->src_addr_width;
} else if (dmaengine_cfg->direction == DMA_DEV_TO_DEV) {
} else if (direction == DMA_DEV_TO_DEV) {
sdmac->per_address2 = dmaengine_cfg->src_addr;
sdmac->per_address = dmaengine_cfg->dst_addr;
sdmac->watermark_level = dmaengine_cfg->src_maxburst &
@ -1594,10 +1591,33 @@ static int sdma_config(struct dma_chan *chan,
dmaengine_cfg->dst_addr_width;
sdmac->word_size = dmaengine_cfg->dst_addr_width;
}
sdmac->direction = dmaengine_cfg->direction;
sdmac->direction = direction;
return sdma_config_channel(chan);
}
static int sdma_config(struct dma_chan *chan,
struct dma_slave_config *dmaengine_cfg)
{
struct sdma_channel *sdmac = to_sdma_chan(chan);
memcpy(&sdmac->slave_config, dmaengine_cfg, sizeof(*dmaengine_cfg));
/* Set ENBLn earlier to make sure dma request triggered after that */
if (sdmac->event_id0) {
if (sdmac->event_id0 >= sdmac->sdma->drvdata->num_events)
return -EINVAL;
sdma_event_enable(sdmac, sdmac->event_id0);
}
if (sdmac->event_id1) {
if (sdmac->event_id1 >= sdmac->sdma->drvdata->num_events)
return -EINVAL;
sdma_event_enable(sdmac, sdmac->event_id1);
}
return 0;
}
static enum dma_status sdma_tx_status(struct dma_chan *chan,
dma_cookie_t cookie,
struct dma_tx_state *txstate)

13
drivers/dma/mediatek/Kconfig
View File

@ -11,3 +11,16 @@ config MTK_HSDMA
This controller provides the channels which is dedicated to
memory-to-memory transfer to offload from CPU through ring-
based descriptor management.
config MTK_CQDMA
tristate "MediaTek Command-Queue DMA controller support"
depends on ARCH_MEDIATEK || COMPILE_TEST
select DMA_ENGINE
select DMA_VIRTUAL_CHANNELS
select ASYNC_TX_ENABLE_CHANNEL_SWITCH
help
Enable support for Command-Queue DMA controller on MediaTek
SoCs.
This controller provides the channels which is dedicated to
memory-to-memory transfer to offload from CPU.

1
drivers/dma/mediatek/Makefile
View File

@ -1 +1,2 @@
obj-$(CONFIG_MTK_HSDMA) += mtk-hsdma.o
obj-$(CONFIG_MTK_CQDMA) += mtk-cqdma.o

951
drivers/dma/mediatek/mtk-cqdma.c Normal file
View File

@ -0,0 +1,951 @@
// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2018-2019 MediaTek Inc.
/*
* Driver for MediaTek Command-Queue DMA Controller
*
* Author: Shun-Chih Yu <shun-chih.yu@mediatek.com>
*
*/
#include <linux/bitops.h>
#include <linux/clk.h>
#include <linux/dmaengine.h>
#include <linux/dma-mapping.h>
#include <linux/err.h>
#include <linux/iopoll.h>
#include <linux/interrupt.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_dma.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/refcount.h>
#include <linux/slab.h>
#include "../virt-dma.h"
#define MTK_CQDMA_USEC_POLL 10
#define MTK_CQDMA_TIMEOUT_POLL 1000
#define MTK_CQDMA_DMA_BUSWIDTHS BIT(DMA_SLAVE_BUSWIDTH_4_BYTES)
#define MTK_CQDMA_ALIGN_SIZE 1
/* The default number of virtual channel */
#define MTK_CQDMA_NR_VCHANS 32
/* The default number of physical channel */
#define MTK_CQDMA_NR_PCHANS 3
/* Registers for underlying dma manipulation */
#define MTK_CQDMA_INT_FLAG 0x0
#define MTK_CQDMA_INT_EN 0x4
#define MTK_CQDMA_EN 0x8
#define MTK_CQDMA_RESET 0xc
#define MTK_CQDMA_FLUSH 0x14
#define MTK_CQDMA_SRC 0x1c
#define MTK_CQDMA_DST 0x20
#define MTK_CQDMA_LEN1 0x24
#define MTK_CQDMA_LEN2 0x28
#define MTK_CQDMA_SRC2 0x60
#define MTK_CQDMA_DST2 0x64
/* Registers setting */
#define MTK_CQDMA_EN_BIT BIT(0)
#define MTK_CQDMA_INT_FLAG_BIT BIT(0)
#define MTK_CQDMA_INT_EN_BIT BIT(0)
#define MTK_CQDMA_FLUSH_BIT BIT(0)
#define MTK_CQDMA_WARM_RST_BIT BIT(0)
#define MTK_CQDMA_HARD_RST_BIT BIT(1)
#define MTK_CQDMA_MAX_LEN GENMASK(27, 0)
#define MTK_CQDMA_ADDR_LIMIT GENMASK(31, 0)
#define MTK_CQDMA_ADDR2_SHFIT (32)
/**
* struct mtk_cqdma_vdesc - The struct holding info describing virtual
* descriptor (CVD)
* @vd: An instance for struct virt_dma_desc
* @len: The total data size device wants to move
* @residue: The remaining data size device will move
* @dest: The destination address device wants to move to
* @src: The source address device wants to move from
* @ch: The pointer to the corresponding dma channel
* @node: The lise_head struct to build link-list for VDs
* @parent: The pointer to the parent CVD
*/
struct mtk_cqdma_vdesc {
struct virt_dma_desc vd;
size_t len;
size_t residue;
dma_addr_t dest;
dma_addr_t src;
struct dma_chan *ch;
struct list_head node;
struct mtk_cqdma_vdesc *parent;
};
/**
* struct mtk_cqdma_pchan - The struct holding info describing physical
* channel (PC)
* @queue: Queue for the PDs issued to this PC
* @base: The mapped register I/O base of this PC
* @irq: The IRQ that this PC are using
* @refcnt: Track how many VCs are using this PC
* @tasklet: Tasklet for this PC
* @lock: Lock protect agaisting multiple VCs access PC
*/
struct mtk_cqdma_pchan {
struct list_head queue;
void __iomem *base;
u32 irq;
refcount_t refcnt;
struct tasklet_struct tasklet;
/* lock to protect PC */
spinlock_t lock;
};
/**
* struct mtk_cqdma_vchan - The struct holding info describing virtual
* channel (VC)
* @vc: An instance for struct virt_dma_chan
* @pc: The pointer to the underlying PC
* @issue_completion: The wait for all issued descriptors completited
* @issue_synchronize: Bool indicating channel synchronization starts
*/
struct mtk_cqdma_vchan {
struct virt_dma_chan vc;
struct mtk_cqdma_pchan *pc;
struct completion issue_completion;
bool issue_synchronize;
};
/**
* struct mtk_cqdma_device - The struct holding info describing CQDMA
* device
* @ddev: An instance for struct dma_device
* @clk: The clock that device internal is using
* @dma_requests: The number of VCs the device supports to
* @dma_channels: The number of PCs the device supports to
* @vc: The pointer to all available VCs
* @pc: The pointer to all the underlying PCs
*/
struct mtk_cqdma_device {
struct dma_device ddev;
struct clk *clk;
u32 dma_requests;
u32 dma_channels;
struct mtk_cqdma_vchan *vc;
struct mtk_cqdma_pchan **pc;
};
static struct mtk_cqdma_device *to_cqdma_dev(struct dma_chan *chan)
{
return container_of(chan->device, struct mtk_cqdma_device, ddev);
}
static struct mtk_cqdma_vchan *to_cqdma_vchan(struct dma_chan *chan)
{
return container_of(chan, struct mtk_cqdma_vchan, vc.chan);
}
static struct mtk_cqdma_vdesc *to_cqdma_vdesc(struct virt_dma_desc *vd)
{
return container_of(vd, struct mtk_cqdma_vdesc, vd);
}
static struct device *cqdma2dev(struct mtk_cqdma_device *cqdma)
{
return cqdma->ddev.dev;
}
static u32 mtk_dma_read(struct mtk_cqdma_pchan *pc, u32 reg)
{
return readl(pc->base + reg);
}
static void mtk_dma_write(struct mtk_cqdma_pchan *pc, u32 reg, u32 val)
{
writel_relaxed(val, pc->base + reg);
}
static void mtk_dma_rmw(struct mtk_cqdma_pchan *pc, u32 reg,
u32 mask, u32 set)
{
u32 val;
val = mtk_dma_read(pc, reg);
val &= ~mask;
val |= set;
mtk_dma_write(pc, reg, val);
}
static void mtk_dma_set(struct mtk_cqdma_pchan *pc, u32 reg, u32 val)
{
mtk_dma_rmw(pc, reg, 0, val);
}
static void mtk_dma_clr(struct mtk_cqdma_pchan *pc, u32 reg, u32 val)
{
mtk_dma_rmw(pc, reg, val, 0);
}
static void mtk_cqdma_vdesc_free(struct virt_dma_desc *vd)
{
kfree(to_cqdma_vdesc(vd));
}
static int mtk_cqdma_poll_engine_done(struct mtk_cqdma_pchan *pc, bool atomic)
{
u32 status = 0;
if (!atomic)
return readl_poll_timeout(pc->base + MTK_CQDMA_EN,
status,
!(status & MTK_CQDMA_EN_BIT),
MTK_CQDMA_USEC_POLL,
MTK_CQDMA_TIMEOUT_POLL);
return readl_poll_timeout_atomic(pc->base + MTK_CQDMA_EN,
status,
!(status & MTK_CQDMA_EN_BIT),
MTK_CQDMA_USEC_POLL,
MTK_CQDMA_TIMEOUT_POLL);
}
static int mtk_cqdma_hard_reset(struct mtk_cqdma_pchan *pc)
{
mtk_dma_set(pc, MTK_CQDMA_RESET, MTK_CQDMA_HARD_RST_BIT);
mtk_dma_clr(pc, MTK_CQDMA_RESET, MTK_CQDMA_HARD_RST_BIT);
return mtk_cqdma_poll_engine_done(pc, false);
}
static void mtk_cqdma_start(struct mtk_cqdma_pchan *pc,
struct mtk_cqdma_vdesc *cvd)
{
/* wait for the previous transaction done */
if (mtk_cqdma_poll_engine_done(pc, true) < 0)
dev_err(cqdma2dev(to_cqdma_dev(cvd->ch)), "cqdma wait transaction timeout\n");
/* warm reset the dma engine for the new transaction */
mtk_dma_set(pc, MTK_CQDMA_RESET, MTK_CQDMA_WARM_RST_BIT);
if (mtk_cqdma_poll_engine_done(pc, true) < 0)
dev_err(cqdma2dev(to_cqdma_dev(cvd->ch)), "cqdma warm reset timeout\n");
/* setup the source */
mtk_dma_set(pc, MTK_CQDMA_SRC, cvd->src & MTK_CQDMA_ADDR_LIMIT);
#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
mtk_dma_set(pc, MTK_CQDMA_SRC2, cvd->src >> MTK_CQDMA_ADDR2_SHFIT);
#else
mtk_dma_set(pc, MTK_CQDMA_SRC2, 0);
#endif
/* setup the destination */
mtk_dma_set(pc, MTK_CQDMA_DST, cvd->dest & MTK_CQDMA_ADDR_LIMIT);
#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
mtk_dma_set(pc, MTK_CQDMA_DST2, cvd->dest >> MTK_CQDMA_ADDR2_SHFIT);
#else
mtk_dma_set(pc, MTK_CQDMA_SRC2, 0);
#endif
/* setup the length */
mtk_dma_set(pc, MTK_CQDMA_LEN1, cvd->len);
/* start dma engine */
mtk_dma_set(pc, MTK_CQDMA_EN, MTK_CQDMA_EN_BIT);
}
static void mtk_cqdma_issue_vchan_pending(struct mtk_cqdma_vchan *cvc)
{
struct virt_dma_desc *vd, *vd2;
struct mtk_cqdma_pchan *pc = cvc->pc;
struct mtk_cqdma_vdesc *cvd;
bool trigger_engine = false;
lockdep_assert_held(&cvc->vc.lock);
lockdep_assert_held(&pc->lock);
list_for_each_entry_safe(vd, vd2, &cvc->vc.desc_issued, node) {
/* need to trigger dma engine if PC's queue is empty */
if (list_empty(&pc->queue))
trigger_engine = true;
cvd = to_cqdma_vdesc(vd);
/* add VD into PC's queue */
list_add_tail(&cvd->node, &pc->queue);
/* start the dma engine */
if (trigger_engine)
mtk_cqdma_start(pc, cvd);
/* remove VD from list desc_issued */
list_del(&vd->node);
}
}
/*
* return true if this VC is active,
* meaning that there are VDs under processing by the PC
*/
static bool mtk_cqdma_is_vchan_active(struct mtk_cqdma_vchan *cvc)
{
struct mtk_cqdma_vdesc *cvd;
list_for_each_entry(cvd, &cvc->pc->queue, node)
if (cvc == to_cqdma_vchan(cvd->ch))
return true;
return false;
}
/*
* return the pointer of the CVD that is just consumed by the PC
*/
static struct mtk_cqdma_vdesc
*mtk_cqdma_consume_work_queue(struct mtk_cqdma_pchan *pc)
{
struct mtk_cqdma_vchan *cvc;
struct mtk_cqdma_vdesc *cvd, *ret = NULL;
/* consume a CVD from PC's queue */
cvd = list_first_entry_or_null(&pc->queue,
struct mtk_cqdma_vdesc, node);
if (unlikely(!cvd || !cvd->parent))
return NULL;
cvc = to_cqdma_vchan(cvd->ch);
ret = cvd;
/* update residue of the parent CVD */
cvd->parent->residue -= cvd->len;
/* delete CVD from PC's queue */
list_del(&cvd->node);
spin_lock(&cvc->vc.lock);
/* check whether all the child CVDs completed */
if (!cvd->parent->residue) {
/* add the parent VD into list desc_completed */
vchan_cookie_complete(&cvd->parent->vd);
/* setup completion if this VC is under synchronization */
if (cvc->issue_synchronize && !mtk_cqdma_is_vchan_active(cvc)) {
complete(&cvc->issue_completion);
cvc->issue_synchronize = false;
}
}
spin_unlock(&cvc->vc.lock);
/* start transaction for next CVD in the queue */
cvd = list_first_entry_or_null(&pc->queue,
struct mtk_cqdma_vdesc, node);
if (cvd)
mtk_cqdma_start(pc, cvd);
return ret;
}
static void mtk_cqdma_tasklet_cb(unsigned long data)
{
struct mtk_cqdma_pchan *pc = (struct mtk_cqdma_pchan *)data;
struct mtk_cqdma_vdesc *cvd = NULL;
unsigned long flags;
spin_lock_irqsave(&pc->lock, flags);
/* consume the queue */
cvd = mtk_cqdma_consume_work_queue(pc);
spin_unlock_irqrestore(&pc->lock, flags);
/* submit the next CVD */
if (cvd) {
dma_run_dependencies(&cvd->vd.tx);
/*
* free child CVD after completion.
* the parent CVD would be freeed with desc_free by user.
*/
if (cvd->parent != cvd)
kfree(cvd);
}
/* re-enable interrupt before leaving tasklet */
enable_irq(pc->irq);
}
static irqreturn_t mtk_cqdma_irq(int irq, void *devid)
{
struct mtk_cqdma_device *cqdma = devid;
irqreturn_t ret = IRQ_NONE;
bool schedule_tasklet = false;
u32 i;
/* clear interrupt flags for each PC */
for (i = 0; i < cqdma->dma_channels; ++i, schedule_tasklet = false) {
spin_lock(&cqdma->pc[i]->lock);
if (mtk_dma_read(cqdma->pc[i],
MTK_CQDMA_INT_FLAG) & MTK_CQDMA_INT_FLAG_BIT) {
/* clear interrupt */
mtk_dma_clr(cqdma->pc[i], MTK_CQDMA_INT_FLAG,
MTK_CQDMA_INT_FLAG_BIT);
schedule_tasklet = true;
ret = IRQ_HANDLED;
}
spin_unlock(&cqdma->pc[i]->lock);
if (schedule_tasklet) {
/* disable interrupt */
disable_irq_nosync(cqdma->pc[i]->irq);
/* schedule the tasklet to handle the transactions */
tasklet_schedule(&cqdma->pc[i]->tasklet);
}
}
return ret;
}
static struct virt_dma_desc *mtk_cqdma_find_active_desc(struct dma_chan *c,
dma_cookie_t cookie)
{
struct mtk_cqdma_vchan *cvc = to_cqdma_vchan(c);
struct virt_dma_desc *vd;
unsigned long flags;
spin_lock_irqsave(&cvc->pc->lock, flags);
list_for_each_entry(vd, &cvc->pc->queue, node)
if (vd->tx.cookie == cookie) {
spin_unlock_irqrestore(&cvc->pc->lock, flags);
return vd;
}
spin_unlock_irqrestore(&cvc->pc->lock, flags);
list_for_each_entry(vd, &cvc->vc.desc_issued, node)
if (vd->tx.cookie == cookie)
return vd;
return NULL;
}
static enum dma_status mtk_cqdma_tx_status(struct dma_chan *c,
dma_cookie_t cookie,
struct dma_tx_state *txstate)
{
struct mtk_cqdma_vchan *cvc = to_cqdma_vchan(c);
struct mtk_cqdma_vdesc *cvd;
struct virt_dma_desc *vd;
enum dma_status ret;
unsigned long flags;
size_t bytes = 0;
ret = dma_cookie_status(c, cookie, txstate);
if (ret == DMA_COMPLETE || !txstate)
return ret;
spin_lock_irqsave(&cvc->vc.lock, flags);
vd = mtk_cqdma_find_active_desc(c, cookie);
spin_unlock_irqrestore(&cvc->vc.lock, flags);
if (vd) {
cvd = to_cqdma_vdesc(vd);
bytes = cvd->residue;
}
dma_set_residue(txstate, bytes);
return ret;
}
static void mtk_cqdma_issue_pending(struct dma_chan *c)
{
struct mtk_cqdma_vchan *cvc = to_cqdma_vchan(c);
unsigned long pc_flags;
unsigned long vc_flags;
/* acquire PC's lock before VS's lock for lock dependency in tasklet */
spin_lock_irqsave(&cvc->pc->lock, pc_flags);
spin_lock_irqsave(&cvc->vc.lock, vc_flags);
if (vchan_issue_pending(&cvc->vc))
mtk_cqdma_issue_vchan_pending(cvc);
spin_unlock_irqrestore(&cvc->vc.lock, vc_flags);
spin_unlock_irqrestore(&cvc->pc->lock, pc_flags);
}
static struct dma_async_tx_descriptor *
mtk_cqdma_prep_dma_memcpy(struct dma_chan *c, dma_addr_t dest,
dma_addr_t src, size_t len, unsigned long flags)
{
struct mtk_cqdma_vdesc **cvd;
struct dma_async_tx_descriptor *tx = NULL, *prev_tx = NULL;
size_t i, tlen, nr_vd;
/*
* In the case that trsanction length is larger than the
* DMA engine supports, a single memcpy transaction needs
* to be separated into several DMA transactions.
* Each DMA transaction would be described by a CVD,
* and the first one is referred as the parent CVD,
* while the others are child CVDs.
* The parent CVD's tx descriptor is the only tx descriptor
* returned to the DMA user, and it should not be completed
* until all the child CVDs completed.
*/
nr_vd = DIV_ROUND_UP(len, MTK_CQDMA_MAX_LEN);
cvd = kcalloc(nr_vd, sizeof(*cvd), GFP_NOWAIT);
if (!cvd)
return NULL;
for (i = 0; i < nr_vd; ++i) {
cvd[i] = kzalloc(sizeof(*cvd[i]), GFP_NOWAIT);
if (!cvd[i]) {
for (; i > 0; --i)
kfree(cvd[i - 1]);
return NULL;
}
/* setup dma channel */
cvd[i]->ch = c;
/* setup sourece, destination, and length */
tlen = (len > MTK_CQDMA_MAX_LEN) ? MTK_CQDMA_MAX_LEN : len;
cvd[i]->len = tlen;
cvd[i]->src = src;
cvd[i]->dest = dest;
/* setup tx descriptor */
tx = vchan_tx_prep(to_virt_chan(c), &cvd[i]->vd, flags);
tx->next = NULL;
if (!i) {
cvd[0]->residue = len;
} else {
prev_tx->next = tx;
cvd[i]->residue = tlen;
}
cvd[i]->parent = cvd[0];
/* update the src, dest, len, prev_tx for the next CVD */
src += tlen;
dest += tlen;
len -= tlen;
prev_tx = tx;
}
return &cvd[0]->vd.tx;
}
static void mtk_cqdma_free_inactive_desc(struct dma_chan *c)
{
struct virt_dma_chan *vc = to_virt_chan(c);
unsigned long flags;
LIST_HEAD(head);
/*
* set desc_allocated, desc_submitted,
* and desc_issued as the candicates to be freed
*/
spin_lock_irqsave(&vc->lock, flags);
list_splice_tail_init(&vc->desc_allocated, &head);
list_splice_tail_init(&vc->desc_submitted, &head);
list_splice_tail_init(&vc->desc_issued, &head);
spin_unlock_irqrestore(&vc->lock, flags);
/* free descriptor lists */
vchan_dma_desc_free_list(vc, &head);
}
static void mtk_cqdma_free_active_desc(struct dma_chan *c)
{
struct mtk_cqdma_vchan *cvc = to_cqdma_vchan(c);
bool sync_needed = false;
unsigned long pc_flags;
unsigned long vc_flags;
/* acquire PC's lock first due to lock dependency in dma ISR */
spin_lock_irqsave(&cvc->pc->lock, pc_flags);
spin_lock_irqsave(&cvc->vc.lock, vc_flags);
/* synchronization is required if this VC is active */
if (mtk_cqdma_is_vchan_active(cvc)) {
cvc->issue_synchronize = true;
sync_needed = true;
}
spin_unlock_irqrestore(&cvc->vc.lock, vc_flags);
spin_unlock_irqrestore(&cvc->pc->lock, pc_flags);
/* waiting for the completion of this VC */
if (sync_needed)
wait_for_completion(&cvc->issue_completion);
/* free all descriptors in list desc_completed */
vchan_synchronize(&cvc->vc);
WARN_ONCE(!list_empty(&cvc->vc.desc_completed),
"Desc pending still in list desc_completed\n");
}
static int mtk_cqdma_terminate_all(struct dma_chan *c)
{
/* free descriptors not processed yet by hardware */
mtk_cqdma_free_inactive_desc(c);
/* free descriptors being processed by hardware */
mtk_cqdma_free_active_desc(c);
return 0;
}
static int mtk_cqdma_alloc_chan_resources(struct dma_chan *c)
{
struct mtk_cqdma_device *cqdma = to_cqdma_dev(c);
struct mtk_cqdma_vchan *vc = to_cqdma_vchan(c);
struct mtk_cqdma_pchan *pc = NULL;
u32 i, min_refcnt = U32_MAX, refcnt;
unsigned long flags;
/* allocate PC with the minimun refcount */
for (i = 0; i < cqdma->dma_channels; ++i) {
refcnt = refcount_read(&cqdma->pc[i]->refcnt);
if (refcnt < min_refcnt) {
pc = cqdma->pc[i];
min_refcnt = refcnt;
}
}
if (!pc)
return -ENOSPC;
spin_lock_irqsave(&pc->lock, flags);
if (!refcount_read(&pc->refcnt)) {
/* allocate PC when the refcount is zero */
mtk_cqdma_hard_reset(pc);
/* enable interrupt for this PC */
mtk_dma_set(pc, MTK_CQDMA_INT_EN, MTK_CQDMA_INT_EN_BIT);
/*
* refcount_inc would complain increment on 0; use-after-free.
* Thus, we need to explicitly set it as 1 initially.
*/
refcount_set(&pc->refcnt, 1);
} else {
refcount_inc(&pc->refcnt);
}
spin_unlock_irqrestore(&pc->lock, flags);
vc->pc = pc;
return 0;
}
static void mtk_cqdma_free_chan_resources(struct dma_chan *c)
{
struct mtk_cqdma_vchan *cvc = to_cqdma_vchan(c);
unsigned long flags;
/* free all descriptors in all lists on the VC */
mtk_cqdma_terminate_all(c);
spin_lock_irqsave(&cvc->pc->lock, flags);
/* PC is not freed until there is no VC mapped to it */
if (refcount_dec_and_test(&cvc->pc->refcnt)) {
/* start the flush operation and stop the engine */
mtk_dma_set(cvc->pc, MTK_CQDMA_FLUSH, MTK_CQDMA_FLUSH_BIT);
/* wait for the completion of flush operation */
if (mtk_cqdma_poll_engine_done(cvc->pc, false) < 0)
dev_err(cqdma2dev(to_cqdma_dev(c)), "cqdma flush timeout\n");
/* clear the flush bit and interrupt flag */
mtk_dma_clr(cvc->pc, MTK_CQDMA_FLUSH, MTK_CQDMA_FLUSH_BIT);
mtk_dma_clr(cvc->pc, MTK_CQDMA_INT_FLAG,
MTK_CQDMA_INT_FLAG_BIT);
/* disable interrupt for this PC */
mtk_dma_clr(cvc->pc, MTK_CQDMA_INT_EN, MTK_CQDMA_INT_EN_BIT);
}
spin_unlock_irqrestore(&cvc->pc->lock, flags);
}
static int mtk_cqdma_hw_init(struct mtk_cqdma_device *cqdma)
{
unsigned long flags;
int err;
u32 i;
pm_runtime_enable(cqdma2dev(cqdma));
pm_runtime_get_sync(cqdma2dev(cqdma));
err = clk_prepare_enable(cqdma->clk);
if (err) {
pm_runtime_put_sync(cqdma2dev(cqdma));
pm_runtime_disable(cqdma2dev(cqdma));
return err;
}
/* reset all PCs */
for (i = 0; i < cqdma->dma_channels; ++i) {
spin_lock_irqsave(&cqdma->pc[i]->lock, flags);
if (mtk_cqdma_hard_reset(cqdma->pc[i]) < 0) {
dev_err(cqdma2dev(cqdma), "cqdma hard reset timeout\n");
spin_unlock_irqrestore(&cqdma->pc[i]->lock, flags);
clk_disable_unprepare(cqdma->clk);
pm_runtime_put_sync(cqdma2dev(cqdma));
pm_runtime_disable(cqdma2dev(cqdma));
return -EINVAL;
}
spin_unlock_irqrestore(&cqdma->pc[i]->lock, flags);
}
return 0;
}
static void mtk_cqdma_hw_deinit(struct mtk_cqdma_device *cqdma)
{
unsigned long flags;
u32 i;
/* reset all PCs */
for (i = 0; i < cqdma->dma_channels; ++i) {
spin_lock_irqsave(&cqdma->pc[i]->lock, flags);
if (mtk_cqdma_hard_reset(cqdma->pc[i]) < 0)
dev_err(cqdma2dev(cqdma), "cqdma hard reset timeout\n");
spin_unlock_irqrestore(&cqdma->pc[i]->lock, flags);
}
clk_disable_unprepare(cqdma->clk);
pm_runtime_put_sync(cqdma2dev(cqdma));
pm_runtime_disable(cqdma2dev(cqdma));
}
static const struct of_device_id mtk_cqdma_match[] = {
{ .compatible = "mediatek,mt6765-cqdma" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, mtk_cqdma_match);
static int mtk_cqdma_probe(struct platform_device *pdev)
{
struct mtk_cqdma_device *cqdma;
struct mtk_cqdma_vchan *vc;
struct dma_device *dd;
struct resource *res;
int err;
u32 i;
cqdma = devm_kzalloc(&pdev->dev, sizeof(*cqdma), GFP_KERNEL);
if (!cqdma)
return -ENOMEM;
dd = &cqdma->ddev;
cqdma->clk = devm_clk_get(&pdev->dev, "cqdma");
if (IS_ERR(cqdma->clk)) {
dev_err(&pdev->dev, "No clock for %s\n",
dev_name(&pdev->dev));
return PTR_ERR(cqdma->clk);
}
dma_cap_set(DMA_MEMCPY, dd->cap_mask);
dd->copy_align = MTK_CQDMA_ALIGN_SIZE;
dd->device_alloc_chan_resources = mtk_cqdma_alloc_chan_resources;
dd->device_free_chan_resources = mtk_cqdma_free_chan_resources;
dd->device_tx_status = mtk_cqdma_tx_status;
dd->device_issue_pending = mtk_cqdma_issue_pending;
dd->device_prep_dma_memcpy = mtk_cqdma_prep_dma_memcpy;
dd->device_terminate_all = mtk_cqdma_terminate_all;
dd->src_addr_widths = MTK_CQDMA_DMA_BUSWIDTHS;
dd->dst_addr_widths = MTK_CQDMA_DMA_BUSWIDTHS;
dd->directions = BIT(DMA_MEM_TO_MEM);
dd->residue_granularity = DMA_RESIDUE_GRANULARITY_SEGMENT;
dd->dev = &pdev->dev;
INIT_LIST_HEAD(&dd->channels);
if (pdev->dev.of_node && of_property_read_u32(pdev->dev.of_node,
"dma-requests",
&cqdma->dma_requests)) {
dev_info(&pdev->dev,
"Using %u as missing dma-requests property\n",
MTK_CQDMA_NR_VCHANS);
cqdma->dma_requests = MTK_CQDMA_NR_VCHANS;
}
if (pdev->dev.of_node && of_property_read_u32(pdev->dev.of_node,
"dma-channels",
&cqdma->dma_channels)) {
dev_info(&pdev->dev,
"Using %u as missing dma-channels property\n",
MTK_CQDMA_NR_PCHANS);
cqdma->dma_channels = MTK_CQDMA_NR_PCHANS;
}
cqdma->pc = devm_kcalloc(&pdev->dev, cqdma->dma_channels,
sizeof(*cqdma->pc), GFP_KERNEL);
if (!cqdma->pc)
return -ENOMEM;
/* initialization for PCs */
for (i = 0; i < cqdma->dma_channels; ++i) {
cqdma->pc[i] = devm_kcalloc(&pdev->dev, 1,
sizeof(**cqdma->pc), GFP_KERNEL);
if (!cqdma->pc[i])
return -ENOMEM;
INIT_LIST_HEAD(&cqdma->pc[i]->queue);
spin_lock_init(&cqdma->pc[i]->lock);
refcount_set(&cqdma->pc[i]->refcnt, 0);
res = platform_get_resource(pdev, IORESOURCE_MEM, i);
if (!res) {
dev_err(&pdev->dev, "No mem resource for %s\n",
dev_name(&pdev->dev));
return -EINVAL;
}
cqdma->pc[i]->base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(cqdma->pc[i]->base))
return PTR_ERR(cqdma->pc[i]->base);
/* allocate IRQ resource */
res = platform_get_resource(pdev, IORESOURCE_IRQ, i);
if (!res) {
dev_err(&pdev->dev, "No irq resource for %s\n",
dev_name(&pdev->dev));
return -EINVAL;
}
cqdma->pc[i]->irq = res->start;
err = devm_request_irq(&pdev->dev, cqdma->pc[i]->irq,
mtk_cqdma_irq, 0, dev_name(&pdev->dev),
cqdma);
if (err) {
dev_err(&pdev->dev,
"request_irq failed with err %d\n", err);
return -EINVAL;
}
}
/* allocate resource for VCs */
cqdma->vc = devm_kcalloc(&pdev->dev, cqdma->dma_requests,
sizeof(*cqdma->vc), GFP_KERNEL);
if (!cqdma->vc)
return -ENOMEM;
for (i = 0; i < cqdma->dma_requests; i++) {
vc = &cqdma->vc[i];
vc->vc.desc_free = mtk_cqdma_vdesc_free;
vchan_init(&vc->vc, dd);
init_completion(&vc->issue_completion);
}
err = dma_async_device_register(dd);
if (err)
return err;
err = of_dma_controller_register(pdev->dev.of_node,
of_dma_xlate_by_chan_id, cqdma);
if (err) {
dev_err(&pdev->dev,
"MediaTek CQDMA OF registration failed %d\n", err);
goto err_unregister;
}
err = mtk_cqdma_hw_init(cqdma);
if (err) {
dev_err(&pdev->dev,
"MediaTek CQDMA HW initialization failed %d\n", err);
goto err_unregister;
}
platform_set_drvdata(pdev, cqdma);
/* initialize tasklet for each PC */
for (i = 0; i < cqdma->dma_channels; ++i)
tasklet_init(&cqdma->pc[i]->tasklet, mtk_cqdma_tasklet_cb,
(unsigned long)cqdma->pc[i]);
dev_info(&pdev->dev, "MediaTek CQDMA driver registered\n");
return 0;
err_unregister:
dma_async_device_unregister(dd);
return err;
}
static int mtk_cqdma_remove(struct platform_device *pdev)
{
struct mtk_cqdma_device *cqdma = platform_get_drvdata(pdev);
struct mtk_cqdma_vchan *vc;
unsigned long flags;
int i;
/* kill VC task */
for (i = 0; i < cqdma->dma_requests; i++) {
vc = &cqdma->vc[i];
list_del(&vc->vc.chan.device_node);
tasklet_kill(&vc->vc.task);
}
/* disable interrupt */
for (i = 0; i < cqdma->dma_channels; i++) {
spin_lock_irqsave(&cqdma->pc[i]->lock, flags);
mtk_dma_clr(cqdma->pc[i], MTK_CQDMA_INT_EN,
MTK_CQDMA_INT_EN_BIT);
spin_unlock_irqrestore(&cqdma->pc[i]->lock, flags);
/* Waits for any pending IRQ handlers to complete */
synchronize_irq(cqdma->pc[i]->irq);
tasklet_kill(&cqdma->pc[i]->tasklet);
}
/* disable hardware */
mtk_cqdma_hw_deinit(cqdma);
dma_async_device_unregister(&cqdma->ddev);
of_dma_controller_free(pdev->dev.of_node);
return 0;
}
static struct platform_driver mtk_cqdma_driver = {
.probe = mtk_cqdma_probe,
.remove = mtk_cqdma_remove,
.driver = {
.name = KBUILD_MODNAME,
.of_match_table = mtk_cqdma_match,
},
};
module_platform_driver(mtk_cqdma_driver);
MODULE_DESCRIPTION("MediaTek CQDMA Controller Driver");
MODULE_AUTHOR("Shun-Chih Yu <shun-chih.yu@mediatek.com>");
MODULE_LICENSE("GPL v2");

22
drivers/dma/mic_x100_dma.c
View File

@ -676,7 +676,7 @@ static void mic_dma_dev_unreg(struct mic_dma_device *mic_dma_dev)
}
/* DEBUGFS CODE */
static int mic_dma_reg_seq_show(struct seq_file *s, void *pos)
static int mic_dma_reg_show(struct seq_file *s, void *pos)
{
struct mic_dma_device *mic_dma_dev = s->private;
int i, chan_num, first_chan = mic_dma_dev->start_ch;
@ -707,23 +707,7 @@ static int mic_dma_reg_seq_show(struct seq_file *s, void *pos)
return 0;
}
static int mic_dma_reg_debug_open(struct inode *inode, struct file *file)
{
return single_open(file, mic_dma_reg_seq_show, inode->i_private);
}
static int mic_dma_reg_debug_release(struct inode *inode, struct file *file)
{
return single_release(inode, file);
}
static const struct file_operations mic_dma_reg_ops = {
.owner = THIS_MODULE,
.open = mic_dma_reg_debug_open,
.read = seq_read,
.llseek = seq_lseek,
.release = mic_dma_reg_debug_release
};
DEFINE_SHOW_ATTRIBUTE(mic_dma_reg);
/* Debugfs parent dir */
static struct dentry *mic_dma_dbg;
@ -747,7 +731,7 @@ static int mic_dma_driver_probe(struct mbus_device *mbdev)
if (mic_dma_dev->dbg_dir)
debugfs_create_file("mic_dma_reg", 0444,
mic_dma_dev->dbg_dir, mic_dma_dev,
&mic_dma_reg_ops);
&mic_dma_reg_fops);
}
return 0;
}

28
drivers/dma/mmp_pdma.c
View File

@ -96,6 +96,7 @@ struct mmp_pdma_chan {
struct dma_async_tx_descriptor desc;
struct mmp_pdma_phy *phy;
enum dma_transfer_direction dir;
struct dma_slave_config slave_config;
struct mmp_pdma_desc_sw *cyclic_first; /* first desc_sw if channel
* is in cyclic mode */
@ -140,6 +141,10 @@ struct mmp_pdma_device {
#define to_mmp_pdma_dev(dmadev) \
container_of(dmadev, struct mmp_pdma_device, device)
static int mmp_pdma_config_write(struct dma_chan *dchan,
struct dma_slave_config *cfg,
enum dma_transfer_direction direction);
static void set_desc(struct mmp_pdma_phy *phy, dma_addr_t addr)
{
u32 reg = (phy->idx << 4) + DDADR;
@ -537,6 +542,8 @@ mmp_pdma_prep_slave_sg(struct dma_chan *dchan, struct scatterlist *sgl,
chan->byte_align = false;
mmp_pdma_config_write(dchan, &chan->slave_config, dir);
for_each_sg(sgl, sg, sg_len, i) {
addr = sg_dma_address(sg);
avail = sg_dma_len(sgl);
@ -619,6 +626,7 @@ mmp_pdma_prep_dma_cyclic(struct dma_chan *dchan,
return NULL;
chan = to_mmp_pdma_chan(dchan);
mmp_pdma_config_write(dchan, &chan->slave_config, direction);
switch (direction) {
case DMA_MEM_TO_DEV:
@ -684,8 +692,9 @@ fail:
return NULL;
}
static int mmp_pdma_config(struct dma_chan *dchan,
struct dma_slave_config *cfg)
static int mmp_pdma_config_write(struct dma_chan *dchan,
struct dma_slave_config *cfg,
enum dma_transfer_direction direction)
{
struct mmp_pdma_chan *chan = to_mmp_pdma_chan(dchan);
u32 maxburst = 0, addr = 0;
@ -694,12 +703,12 @@ static int mmp_pdma_config(struct dma_chan *dchan,
if (!dchan)
return -EINVAL;
if (cfg->direction == DMA_DEV_TO_MEM) {
if (direction == DMA_DEV_TO_MEM) {
chan->dcmd = DCMD_INCTRGADDR | DCMD_FLOWSRC;
maxburst = cfg->src_maxburst;
width = cfg->src_addr_width;
addr = cfg->src_addr;
} else if (cfg->direction == DMA_MEM_TO_DEV) {
} else if (direction == DMA_MEM_TO_DEV) {
chan->dcmd = DCMD_INCSRCADDR | DCMD_FLOWTRG;
maxburst = cfg->dst_maxburst;
width = cfg->dst_addr_width;
@ -720,7 +729,7 @@ static int mmp_pdma_config(struct dma_chan *dchan,
else if (maxburst == 32)
chan->dcmd |= DCMD_BURST32;
chan->dir = cfg->direction;
chan->dir = direction;
chan->dev_addr = addr;
/* FIXME: drivers should be ported over to use the filter
* function. Once that's done, the following two lines can
@ -732,6 +741,15 @@ static int mmp_pdma_config(struct dma_chan *dchan,
return 0;
}
static int mmp_pdma_config(struct dma_chan *dchan,
struct dma_slave_config *cfg)
{
struct mmp_pdma_chan *chan = to_mmp_pdma_chan(dchan);
memcpy(&chan->slave_config, cfg, sizeof(*cfg));
return 0;
}
static int mmp_pdma_terminate_all(struct dma_chan *dchan)
{
struct mmp_pdma_chan *chan = to_mmp_pdma_chan(dchan);

28
drivers/dma/pl330.c
View File

@ -448,6 +448,7 @@ struct dma_pl330_chan {
/* DMA-mapped view of the FIFO; may differ if an IOMMU is present */
dma_addr_t fifo_dma;
enum dma_data_direction dir;
struct dma_slave_config slave_config;
/* for cyclic capability */
bool cyclic;
@ -542,6 +543,10 @@ struct _xfer_spec {
struct dma_pl330_desc *desc;
};
static int pl330_config_write(struct dma_chan *chan,
struct dma_slave_config *slave_config,
enum dma_transfer_direction direction);
static inline bool _queue_full(struct pl330_thread *thrd)
{
return thrd->req[0].desc != NULL && thrd->req[1].desc != NULL;
@ -2220,20 +2225,21 @@ static int fixup_burst_len(int max_burst_len, int quirks)
return max_burst_len;
}
static int pl330_config(struct dma_chan *chan,
struct dma_slave_config *slave_config)
static int pl330_config_write(struct dma_chan *chan,
struct dma_slave_config *slave_config,
enum dma_transfer_direction direction)
{
struct dma_pl330_chan *pch = to_pchan(chan);
pl330_unprep_slave_fifo(pch);
if (slave_config->direction == DMA_MEM_TO_DEV) {
if (direction == DMA_MEM_TO_DEV) {
if (slave_config->dst_addr)
pch->fifo_addr = slave_config->dst_addr;
if (slave_config->dst_addr_width)
pch->burst_sz = __ffs(slave_config->dst_addr_width);
pch->burst_len = fixup_burst_len(slave_config->dst_maxburst,
pch->dmac->quirks);
} else if (slave_config->direction == DMA_DEV_TO_MEM) {
} else if (direction == DMA_DEV_TO_MEM) {
if (slave_config->src_addr)
pch->fifo_addr = slave_config->src_addr;
if (slave_config->src_addr_width)
@ -2245,6 +2251,16 @@ static int pl330_config(struct dma_chan *chan,
return 0;
}
static int pl330_config(struct dma_chan *chan,
struct dma_slave_config *slave_config)
{
struct dma_pl330_chan *pch = to_pchan(chan);
memcpy(&pch->slave_config, slave_config, sizeof(*slave_config));
return 0;
}
static int pl330_terminate_all(struct dma_chan *chan)
{
struct dma_pl330_chan *pch = to_pchan(chan);
@ -2661,6 +2677,8 @@ static struct dma_async_tx_descriptor *pl330_prep_dma_cyclic(
return NULL;
}
pl330_config_write(chan, &pch->slave_config, direction);
if (!pl330_prep_slave_fifo(pch, direction))
return NULL;
@ -2815,6 +2833,8 @@ pl330_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
if (unlikely(!pch || !sgl || !sg_len))
return NULL;
pl330_config_write(chan, &pch->slave_config, direction);
if (!pl330_prep_slave_fifo(pch, direction))
return NULL;

36
drivers/dma/pxa_dma.c
View File

@ -189,7 +189,7 @@ static bool pxad_filter_fn(struct dma_chan *chan, void *param);
#include <linux/uaccess.h>
#include <linux/seq_file.h>
static int dbg_show_requester_chan(struct seq_file *s, void *p)
static int requester_chan_show(struct seq_file *s, void *p)
{
struct pxad_phy *phy = s->private;
int i;
@ -220,7 +220,7 @@ static int is_phys_valid(unsigned long addr)
#define PXA_DCSR_STR(flag) (dcsr & PXA_DCSR_##flag ? #flag" " : "")
#define PXA_DCMD_STR(flag) (dcmd & PXA_DCMD_##flag ? #flag" " : "")
static int dbg_show_descriptors(struct seq_file *s, void *p)
static int descriptors_show(struct seq_file *s, void *p)
{
struct pxad_phy *phy = s->private;
int i, max_show = 20, burst, width;
@ -263,7 +263,7 @@ static int dbg_show_descriptors(struct seq_file *s, void *p)
return 0;
}
static int dbg_show_chan_state(struct seq_file *s, void *p)
static int chan_state_show(struct seq_file *s, void *p)
{
struct pxad_phy *phy = s->private;
u32 dcsr, dcmd;
@ -306,7 +306,7 @@ static int dbg_show_chan_state(struct seq_file *s, void *p)
return 0;
}
static int dbg_show_state(struct seq_file *s, void *p)
static int state_show(struct seq_file *s, void *p)
{
struct pxad_device *pdev = s->private;
@ -317,22 +317,10 @@ static int dbg_show_state(struct seq_file *s, void *p)
return 0;
}
#define DBGFS_FUNC_DECL(name) \
static int dbg_open_##name(struct inode *inode, struct file *file) \
{ \
return single_open(file, dbg_show_##name, inode->i_private); \
} \
static const struct file_operations dbg_fops_##name = { \
.open = dbg_open_##name, \
.llseek = seq_lseek, \
.read = seq_read, \
.release = single_release, \
}
DBGFS_FUNC_DECL(state);
DBGFS_FUNC_DECL(chan_state);
DBGFS_FUNC_DECL(descriptors);
DBGFS_FUNC_DECL(requester_chan);
DEFINE_SHOW_ATTRIBUTE(state);
DEFINE_SHOW_ATTRIBUTE(chan_state);
DEFINE_SHOW_ATTRIBUTE(descriptors);
DEFINE_SHOW_ATTRIBUTE(requester_chan);
static struct dentry *pxad_dbg_alloc_chan(struct pxad_device *pdev,
int ch, struct dentry *chandir)
@ -348,13 +336,13 @@ static struct dentry *pxad_dbg_alloc_chan(struct pxad_device *pdev,
if (chan)
chan_state = debugfs_create_file("state", 0400, chan, dt,
&dbg_fops_chan_state);
&chan_state_fops);
if (chan_state)
chan_descr = debugfs_create_file("descriptors", 0400, chan, dt,
&dbg_fops_descriptors);
&descriptors_fops);
if (chan_descr)
chan_reqs = debugfs_create_file("requesters", 0400, chan, dt,
&dbg_fops_requester_chan);
&requester_chan_fops);
if (!chan_reqs)
goto err_state;
@ -375,7 +363,7 @@ static void pxad_init_debugfs(struct pxad_device *pdev)
goto err_root;
pdev->dbgfs_state = debugfs_create_file("state", 0400, pdev->dbgfs_root,
pdev, &dbg_fops_state);
pdev, &state_fops);
if (!pdev->dbgfs_state)
goto err_state;

33
drivers/dma/qcom/hidma_dbg.c
View File

@ -85,11 +85,11 @@ static void hidma_ll_devstats(struct seq_file *s, void *llhndl)
}
/*
* hidma_chan_stats: display HIDMA channel statistics
* hidma_chan_show: display HIDMA channel statistics
*
* Display the statistics for the current HIDMA virtual channel device.
*/
static int hidma_chan_stats(struct seq_file *s, void *unused)
static int hidma_chan_show(struct seq_file *s, void *unused)
{
struct hidma_chan *mchan = s->private;
struct hidma_desc *mdesc;
@ -117,11 +117,11 @@ static int hidma_chan_stats(struct seq_file *s, void *unused)
}
/*
* hidma_dma_info: display HIDMA device info
* hidma_dma_show: display HIDMA device info
*
* Display the info for the current HIDMA device.
*/
static int hidma_dma_info(struct seq_file *s, void *unused)
static int hidma_dma_show(struct seq_file *s, void *unused)
{
struct hidma_dev *dmadev = s->private;
resource_size_t sz;
@ -138,29 +138,8 @@ static int hidma_dma_info(struct seq_file *s, void *unused)
return 0;
}
static int hidma_chan_stats_open(struct inode *inode, struct file *file)
{
return single_open(file, hidma_chan_stats, inode->i_private);
}
static int hidma_dma_info_open(struct inode *inode, struct file *file)
{
return single_open(file, hidma_dma_info, inode->i_private);
}
static const struct file_operations hidma_chan_fops = {
.open = hidma_chan_stats_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static const struct file_operations hidma_dma_fops = {
.open = hidma_dma_info_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
DEFINE_SHOW_ATTRIBUTE(hidma_chan);
DEFINE_SHOW_ATTRIBUTE(hidma_dma);
void hidma_debug_uninit(struct hidma_dev *dmadev)
{

21
drivers/dma/sa11x0-dma.c
View File

@ -17,7 +17,6 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/sa11x0-dma.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
@ -830,6 +829,14 @@ static const struct dma_slave_map sa11x0_dma_map[] = {
{ "sa11x0-ssp", "rx", "Ser4SSPRc" },
};
static bool sa11x0_dma_filter_fn(struct dma_chan *chan, void *param)
{
struct sa11x0_dma_chan *c = to_sa11x0_dma_chan(chan);
const char *p = param;
return !strcmp(c->name, p);
}
static int sa11x0_dma_init_dmadev(struct dma_device *dmadev,
struct device *dev)
{
@ -1087,18 +1094,6 @@ static struct platform_driver sa11x0_dma_driver = {
.remove = sa11x0_dma_remove,
};
bool sa11x0_dma_filter_fn(struct dma_chan *chan, void *param)
{
if (chan->device->dev->driver == &sa11x0_dma_driver.driver) {
struct sa11x0_dma_chan *c = to_sa11x0_dma_chan(chan);
const char *p = param;
return !strcmp(c->name, p);
}
return false;
}
EXPORT_SYMBOL(sa11x0_dma_filter_fn);
static int __init sa11x0_dma_init(void)
{
return platform_driver_register(&sa11x0_dma_driver);

12
drivers/dma/sh/Kconfig
View File

@ -1,3 +1,4 @@
# SPDX-License-Identifier: GPL-2.0
#
# DMA engine configuration for sh
#
@ -12,7 +13,7 @@ config RENESAS_DMA
config SH_DMAE_BASE
bool "Renesas SuperH DMA Engine support"
depends on SUPERH || ARCH_RENESAS || COMPILE_TEST
depends on SUPERH || COMPILE_TEST
depends on !SUPERH || SH_DMA
depends on !SH_DMA_API
default y
@ -30,15 +31,6 @@ config SH_DMAE
help
Enable support for the Renesas SuperH DMA controllers.
if SH_DMAE
config SH_DMAE_R8A73A4
def_bool y
depends on ARCH_R8A73A4
depends on OF
endif
config RCAR_DMAC
tristate "Renesas R-Car Gen2 DMA Controller"
depends on ARCH_RENESAS || COMPILE_TEST

1
drivers/dma/sh/Makefile
View File

@ -10,7 +10,6 @@ obj-$(CONFIG_SH_DMAE_BASE) += shdma-base.o shdma-of.o
#
shdma-y := shdmac.o
shdma-$(CONFIG_SH_DMAE_R8A73A4) += shdma-r8a73a4.o
shdma-objs := $(shdma-y)
obj-$(CONFIG_SH_DMAE) += shdma.o

74
drivers/dma/sh/shdma-r8a73a4.c
View File

@ -1,74 +0,0 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Renesas SuperH DMA Engine support for r8a73a4 (APE6) SoCs
*
* Copyright (C) 2013 Renesas Electronics, Inc.
*/
#include <linux/sh_dma.h>
#include "shdma-arm.h"
static const unsigned int dma_ts_shift[] = SH_DMAE_TS_SHIFT;
static const struct sh_dmae_slave_config dma_slaves[] = {
{
.chcr = CHCR_TX(XMIT_SZ_32BIT),
.mid_rid = 0xd1, /* MMC0 Tx */
}, {
.chcr = CHCR_RX(XMIT_SZ_32BIT),
.mid_rid = 0xd2, /* MMC0 Rx */
}, {
.chcr = CHCR_TX(XMIT_SZ_32BIT),
.mid_rid = 0xe1, /* MMC1 Tx */
}, {
.chcr = CHCR_RX(XMIT_SZ_32BIT),
.mid_rid = 0xe2, /* MMC1 Rx */
},
};
#define DMAE_CHANNEL(a, b) \
{ \
.offset = (a) - 0x20, \
.dmars = (a) - 0x20 + 0x40, \
.chclr_bit = (b), \
.chclr_offset = 0x80 - 0x20, \
}
static const struct sh_dmae_channel dma_channels[] = {
DMAE_CHANNEL(0x8000, 0),
DMAE_CHANNEL(0x8080, 1),
DMAE_CHANNEL(0x8100, 2),
DMAE_CHANNEL(0x8180, 3),
DMAE_CHANNEL(0x8200, 4),
DMAE_CHANNEL(0x8280, 5),
DMAE_CHANNEL(0x8300, 6),
DMAE_CHANNEL(0x8380, 7),
DMAE_CHANNEL(0x8400, 8),
DMAE_CHANNEL(0x8480, 9),
DMAE_CHANNEL(0x8500, 10),
DMAE_CHANNEL(0x8580, 11),
DMAE_CHANNEL(0x8600, 12),
DMAE_CHANNEL(0x8680, 13),
DMAE_CHANNEL(0x8700, 14),
DMAE_CHANNEL(0x8780, 15),
DMAE_CHANNEL(0x8800, 16),
DMAE_CHANNEL(0x8880, 17),
DMAE_CHANNEL(0x8900, 18),
DMAE_CHANNEL(0x8980, 19),
};
const struct sh_dmae_pdata r8a73a4_dma_pdata = {
.slave = dma_slaves,
.slave_num = ARRAY_SIZE(dma_slaves),
.channel = dma_channels,
.channel_num = ARRAY_SIZE(dma_channels),
.ts_low_shift = TS_LOW_SHIFT,
.ts_low_mask = TS_LOW_BIT << TS_LOW_SHIFT,
.ts_high_shift = TS_HI_SHIFT,
.ts_high_mask = TS_HI_BIT << TS_HI_SHIFT,
.ts_shift = dma_ts_shift,
.ts_shift_num = ARRAY_SIZE(dma_ts_shift),
.dmaor_init = DMAOR_DME,
.chclr_present = 1,
.chclr_bitwise = 1,
};

7
drivers/dma/sh/shdma.h
View File

@ -58,11 +58,4 @@ struct sh_dmae_desc {
#define to_sh_dev(chan) container_of(chan->shdma_chan.dma_chan.device,\
struct sh_dmae_device, shdma_dev.dma_dev)
#ifdef CONFIG_SH_DMAE_R8A73A4
extern const struct sh_dmae_pdata r8a73a4_dma_pdata;
#define r8a73a4_shdma_devid (&r8a73a4_dma_pdata)
#else
#define r8a73a4_shdma_devid NULL
#endif
#endif /* __DMA_SHDMA_H */

7
drivers/dma/sh/shdmac.c
View File

@ -665,12 +665,6 @@ static const struct shdma_ops sh_dmae_shdma_ops = {
.get_partial = sh_dmae_get_partial,
};
static const struct of_device_id sh_dmae_of_match[] = {
{.compatible = "renesas,shdma-r8a73a4", .data = r8a73a4_shdma_devid,},
{}
};
MODULE_DEVICE_TABLE(of, sh_dmae_of_match);
static int sh_dmae_probe(struct platform_device *pdev)
{
const enum dma_slave_buswidth widths =
@ -915,7 +909,6 @@ static struct platform_driver sh_dmae_driver = {
.driver = {
.pm = &sh_dmae_pm,
.name = SH_DMAE_DRV_NAME,
.of_match_table = sh_dmae_of_match,
},
.remove = sh_dmae_remove,
};

152
drivers/dma/sprd-dma.c
View File

@ -36,6 +36,8 @@
#define SPRD_DMA_GLB_CHN_EN_STS 0x1c
#define SPRD_DMA_GLB_DEBUG_STS 0x20
#define SPRD_DMA_GLB_ARB_SEL_STS 0x24
#define SPRD_DMA_GLB_2STAGE_GRP1 0x28
#define SPRD_DMA_GLB_2STAGE_GRP2 0x2c
#define SPRD_DMA_GLB_REQ_UID(uid) (0x4 * ((uid) - 1))
#define SPRD_DMA_GLB_REQ_UID_OFFSET 0x2000
@ -57,6 +59,18 @@
#define SPRD_DMA_CHN_SRC_BLK_STEP 0x38
#define SPRD_DMA_CHN_DES_BLK_STEP 0x3c
/* SPRD_DMA_GLB_2STAGE_GRP register definition */
#define SPRD_DMA_GLB_2STAGE_EN BIT(24)
#define SPRD_DMA_GLB_CHN_INT_MASK GENMASK(23, 20)
#define SPRD_DMA_GLB_LIST_DONE_TRG BIT(19)
#define SPRD_DMA_GLB_TRANS_DONE_TRG BIT(18)
#define SPRD_DMA_GLB_BLOCK_DONE_TRG BIT(17)
#define SPRD_DMA_GLB_FRAG_DONE_TRG BIT(16)
#define SPRD_DMA_GLB_TRG_OFFSET 16
#define SPRD_DMA_GLB_DEST_CHN_MASK GENMASK(13, 8)
#define SPRD_DMA_GLB_DEST_CHN_OFFSET 8
#define SPRD_DMA_GLB_SRC_CHN_MASK GENMASK(5, 0)
/* SPRD_DMA_CHN_INTC register definition */
#define SPRD_DMA_INT_MASK GENMASK(4, 0)
#define SPRD_DMA_INT_CLR_OFFSET 24
@ -118,6 +132,10 @@
#define SPRD_DMA_SRC_TRSF_STEP_OFFSET 0
#define SPRD_DMA_TRSF_STEP_MASK GENMASK(15, 0)
/* define DMA channel mode & trigger mode mask */
#define SPRD_DMA_CHN_MODE_MASK GENMASK(7, 0)
#define SPRD_DMA_TRG_MODE_MASK GENMASK(7, 0)
/* define the DMA transfer step type */
#define SPRD_DMA_NONE_STEP 0
#define SPRD_DMA_BYTE_STEP 1
@ -159,6 +177,7 @@ struct sprd_dma_chn_hw {
struct sprd_dma_desc {
struct virt_dma_desc vd;
struct sprd_dma_chn_hw chn_hw;
enum dma_transfer_direction dir;
};
/* dma channel description */
@ -169,6 +188,8 @@ struct sprd_dma_chn {
struct dma_slave_config slave_cfg;
u32 chn_num;
u32 dev_id;
enum sprd_dma_chn_mode chn_mode;
enum sprd_dma_trg_mode trg_mode;
struct sprd_dma_desc *cur_desc;
};
@ -205,6 +226,16 @@ static inline struct sprd_dma_desc *to_sprd_dma_desc(struct virt_dma_desc *vd)
return container_of(vd, struct sprd_dma_desc, vd);
}
static void sprd_dma_glb_update(struct sprd_dma_dev *sdev, u32 reg,
u32 mask, u32 val)
{
u32 orig = readl(sdev->glb_base + reg);
u32 tmp;
tmp = (orig & ~mask) | val;
writel(tmp, sdev->glb_base + reg);
}
static void sprd_dma_chn_update(struct sprd_dma_chn *schan, u32 reg,
u32 mask, u32 val)
{
@ -331,6 +362,17 @@ static void sprd_dma_stop_and_disable(struct sprd_dma_chn *schan)
sprd_dma_disable_chn(schan);
}
static unsigned long sprd_dma_get_src_addr(struct sprd_dma_chn *schan)
{
unsigned long addr, addr_high;
addr = readl(schan->chn_base + SPRD_DMA_CHN_SRC_ADDR);
addr_high = readl(schan->chn_base + SPRD_DMA_CHN_WARP_PTR) &
SPRD_DMA_HIGH_ADDR_MASK;
return addr | (addr_high << SPRD_DMA_HIGH_ADDR_OFFSET);
}
static unsigned long sprd_dma_get_dst_addr(struct sprd_dma_chn *schan)
{
unsigned long addr, addr_high;
@ -377,6 +419,49 @@ static enum sprd_dma_req_mode sprd_dma_get_req_type(struct sprd_dma_chn *schan)
return (frag_reg >> SPRD_DMA_REQ_MODE_OFFSET) & SPRD_DMA_REQ_MODE_MASK;
}
static int sprd_dma_set_2stage_config(struct sprd_dma_chn *schan)
{
struct sprd_dma_dev *sdev = to_sprd_dma_dev(&schan->vc.chan);
u32 val, chn = schan->chn_num + 1;
switch (schan->chn_mode) {
case SPRD_DMA_SRC_CHN0:
val = chn & SPRD_DMA_GLB_SRC_CHN_MASK;
val |= BIT(schan->trg_mode - 1) << SPRD_DMA_GLB_TRG_OFFSET;
val |= SPRD_DMA_GLB_2STAGE_EN;
sprd_dma_glb_update(sdev, SPRD_DMA_GLB_2STAGE_GRP1, val, val);
break;
case SPRD_DMA_SRC_CHN1:
val = chn & SPRD_DMA_GLB_SRC_CHN_MASK;
val |= BIT(schan->trg_mode - 1) << SPRD_DMA_GLB_TRG_OFFSET;
val |= SPRD_DMA_GLB_2STAGE_EN;
sprd_dma_glb_update(sdev, SPRD_DMA_GLB_2STAGE_GRP2, val, val);
break;
case SPRD_DMA_DST_CHN0:
val = (chn << SPRD_DMA_GLB_DEST_CHN_OFFSET) &
SPRD_DMA_GLB_DEST_CHN_MASK;
val |= SPRD_DMA_GLB_2STAGE_EN;
sprd_dma_glb_update(sdev, SPRD_DMA_GLB_2STAGE_GRP1, val, val);
break;
case SPRD_DMA_DST_CHN1:
val = (chn << SPRD_DMA_GLB_DEST_CHN_OFFSET) &
SPRD_DMA_GLB_DEST_CHN_MASK;
val |= SPRD_DMA_GLB_2STAGE_EN;
sprd_dma_glb_update(sdev, SPRD_DMA_GLB_2STAGE_GRP2, val, val);
break;
default:
dev_err(sdev->dma_dev.dev, "invalid channel mode setting %d\n",
schan->chn_mode);
return -EINVAL;
}
return 0;
}
static void sprd_dma_set_chn_config(struct sprd_dma_chn *schan,
struct sprd_dma_desc *sdesc)
{
@ -410,6 +495,13 @@ static void sprd_dma_start(struct sprd_dma_chn *schan)
list_del(&vd->node);
schan->cur_desc = to_sprd_dma_desc(vd);
/*
* Set 2-stage configuration if the channel starts one 2-stage
* transfer.
*/
if (schan->chn_mode && sprd_dma_set_2stage_config(schan))
return;
/*
* Copy the DMA configuration from DMA descriptor to this hardware
* channel.
@ -427,6 +519,7 @@ static void sprd_dma_stop(struct sprd_dma_chn *schan)
sprd_dma_stop_and_disable(schan);
sprd_dma_unset_uid(schan);
sprd_dma_clear_int(schan);
schan->cur_desc = NULL;
}
static bool sprd_dma_check_trans_done(struct sprd_dma_desc *sdesc,
@ -450,7 +543,7 @@ static irqreturn_t dma_irq_handle(int irq, void *dev_id)
struct sprd_dma_desc *sdesc;
enum sprd_dma_req_mode req_type;
enum sprd_dma_int_type int_type;
bool trans_done = false;
bool trans_done = false, cyclic = false;
u32 i;
while (irq_status) {
@ -465,13 +558,19 @@ static irqreturn_t dma_irq_handle(int irq, void *dev_id)
sdesc = schan->cur_desc;
/* Check if the dma request descriptor is done. */
trans_done = sprd_dma_check_trans_done(sdesc, int_type,
req_type);
if (trans_done == true) {
vchan_cookie_complete(&sdesc->vd);
schan->cur_desc = NULL;
sprd_dma_start(schan);
/* cyclic mode schedule callback */
cyclic = schan->linklist.phy_addr ? true : false;
if (cyclic == true) {
vchan_cyclic_callback(&sdesc->vd);
} else {
/* Check if the dma request descriptor is done. */
trans_done = sprd_dma_check_trans_done(sdesc, int_type,
req_type);
if (trans_done == true) {
vchan_cookie_complete(&sdesc->vd);
schan->cur_desc = NULL;
sprd_dma_start(schan);
}
}
spin_unlock(&schan->vc.lock);
}
@ -534,7 +633,12 @@ static enum dma_status sprd_dma_tx_status(struct dma_chan *chan,
else
pos = 0;
} else if (schan->cur_desc && schan->cur_desc->vd.tx.cookie == cookie) {
pos = sprd_dma_get_dst_addr(schan);
struct sprd_dma_desc *sdesc = to_sprd_dma_desc(vd);
if (sdesc->dir == DMA_DEV_TO_MEM)
pos = sprd_dma_get_dst_addr(schan);
else
pos = sprd_dma_get_src_addr(schan);
} else {
pos = 0;
}
@ -593,6 +697,7 @@ static int sprd_dma_fill_desc(struct dma_chan *chan,
{
struct sprd_dma_dev *sdev = to_sprd_dma_dev(chan);
struct sprd_dma_chn *schan = to_sprd_dma_chan(chan);
enum sprd_dma_chn_mode chn_mode = schan->chn_mode;
u32 req_mode = (flags >> SPRD_DMA_REQ_SHIFT) & SPRD_DMA_REQ_MODE_MASK;
u32 int_mode = flags & SPRD_DMA_INT_MASK;
int src_datawidth, dst_datawidth, src_step, dst_step;
@ -604,7 +709,16 @@ static int sprd_dma_fill_desc(struct dma_chan *chan,
dev_err(sdev->dma_dev.dev, "invalid source step\n");
return src_step;
}
dst_step = SPRD_DMA_NONE_STEP;
/*
* For 2-stage transfer, destination channel step can not be 0,
* since destination device is AON IRAM.
*/
if (chn_mode == SPRD_DMA_DST_CHN0 ||
chn_mode == SPRD_DMA_DST_CHN1)
dst_step = src_step;
else
dst_step = SPRD_DMA_NONE_STEP;
} else {
dst_step = sprd_dma_get_step(slave_cfg->dst_addr_width);
if (dst_step < 0) {
@ -674,13 +788,11 @@ static int sprd_dma_fill_desc(struct dma_chan *chan,
/* link-list configuration */
if (schan->linklist.phy_addr) {
if (sg_index == sglen - 1)
hw->frg_len |= SPRD_DMA_LLIST_END;
hw->cfg |= SPRD_DMA_LINKLIST_EN;
/* link-list index */
temp = (sg_index + 1) % sglen;
temp = sglen ? (sg_index + 1) % sglen : 0;
/* Next link-list configuration's physical address offset */
temp = temp * sizeof(*hw) + SPRD_DMA_CHN_SRC_ADDR;
/*
@ -804,6 +916,8 @@ sprd_dma_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
if (!sdesc)
return NULL;
sdesc->dir = dir;
for_each_sg(sgl, sg, sglen, i) {
len = sg_dma_len(sg);
@ -831,6 +945,12 @@ sprd_dma_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
}
}
/* Set channel mode and trigger mode for 2-stage transfer */
schan->chn_mode =
(flags >> SPRD_DMA_CHN_MODE_SHIFT) & SPRD_DMA_CHN_MODE_MASK;
schan->trg_mode =
(flags >> SPRD_DMA_TRG_MODE_SHIFT) & SPRD_DMA_TRG_MODE_MASK;
ret = sprd_dma_fill_desc(chan, &sdesc->chn_hw, 0, 0, src, dst, len,
dir, flags, slave_cfg);
if (ret) {
@ -847,9 +967,6 @@ static int sprd_dma_slave_config(struct dma_chan *chan,
struct sprd_dma_chn *schan = to_sprd_dma_chan(chan);
struct dma_slave_config *slave_cfg = &schan->slave_cfg;
if (!is_slave_direction(config->direction))
return -EINVAL;
memcpy(slave_cfg, config, sizeof(*config));
return 0;
}
@ -1109,4 +1226,5 @@ module_platform_driver(sprd_dma_driver);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("DMA driver for Spreadtrum");
MODULE_AUTHOR("Baolin Wang <baolin.wang@spreadtrum.com>");
MODULE_AUTHOR("Eric Long <eric.long@spreadtrum.com>");
MODULE_ALIAS("platform:sprd-dma");

31
drivers/dma/ste_dma40.c
View File

@ -442,6 +442,7 @@ struct d40_base;
* @queue: Queued jobs.
* @prepare_queue: Prepared jobs.
* @dma_cfg: The client configuration of this dma channel.
* @slave_config: DMA slave configuration.
* @configured: whether the dma_cfg configuration is valid
* @base: Pointer to the device instance struct.
* @src_def_cfg: Default cfg register setting for src.
@ -468,6 +469,7 @@ struct d40_chan {
struct list_head queue;
struct list_head prepare_queue;
struct stedma40_chan_cfg dma_cfg;
struct dma_slave_config slave_config;
bool configured;
struct d40_base *base;
/* Default register configurations */
@ -625,6 +627,10 @@ static void __iomem *chan_base(struct d40_chan *chan)
#define chan_err(d40c, format, arg...) \
d40_err(chan2dev(d40c), format, ## arg)
static int d40_set_runtime_config_write(struct dma_chan *chan,
struct dma_slave_config *config,
enum dma_transfer_direction direction);
static int d40_pool_lli_alloc(struct d40_chan *d40c, struct d40_desc *d40d,
int lli_len)
{
@ -2216,6 +2222,8 @@ d40_prep_sg(struct dma_chan *dchan, struct scatterlist *sg_src,
return NULL;
}
d40_set_runtime_config_write(dchan, &chan->slave_config, direction);
spin_lock_irqsave(&chan->lock, flags);
desc = d40_prep_desc(chan, sg_src, sg_len, dma_flags);
@ -2634,11 +2642,22 @@ dma40_config_to_halfchannel(struct d40_chan *d40c,
return 0;
}
/* Runtime reconfiguration extension */
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);
memcpy(&d40c->slave_config, config, sizeof(*config));
return 0;
}
/* Runtime reconfiguration extension */
static int d40_set_runtime_config_write(struct dma_chan *chan,
struct dma_slave_config *config,
enum dma_transfer_direction direction)
{
struct d40_chan *d40c = container_of(chan, struct d40_chan, chan);
struct stedma40_chan_cfg *cfg = &d40c->dma_cfg;
enum dma_slave_buswidth src_addr_width, dst_addr_width;
dma_addr_t config_addr;
@ -2655,7 +2674,7 @@ static int d40_set_runtime_config(struct dma_chan *chan,
dst_addr_width = config->dst_addr_width;
dst_maxburst = config->dst_maxburst;
if (config->direction == DMA_DEV_TO_MEM) {
if (direction == DMA_DEV_TO_MEM) {
config_addr = config->src_addr;
if (cfg->dir != DMA_DEV_TO_MEM)
@ -2671,7 +2690,7 @@ static int d40_set_runtime_config(struct dma_chan *chan,
if (dst_maxburst == 0)
dst_maxburst = src_maxburst;
} else if (config->direction == DMA_MEM_TO_DEV) {
} else if (direction == DMA_MEM_TO_DEV) {
config_addr = config->dst_addr;
if (cfg->dir != DMA_MEM_TO_DEV)
@ -2689,7 +2708,7 @@ static int d40_set_runtime_config(struct dma_chan *chan,
} else {
dev_err(d40c->base->dev,
"unrecognized channel direction %d\n",
config->direction);
direction);
return -EINVAL;
}
@ -2746,12 +2765,12 @@ static int d40_set_runtime_config(struct dma_chan *chan,
/* These settings will take precedence later */
d40c->runtime_addr = config_addr;
d40c->runtime_direction = config->direction;
d40c->runtime_direction = direction;
dev_dbg(d40c->base->dev,
"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_DEV_TO_MEM) ? "RX" : "TX",
(direction == DMA_DEV_TO_MEM) ? "RX" : "TX",
src_addr_width, dst_addr_width,
src_maxburst, dst_maxburst);

506
drivers/dma/uniphier-mdmac.c Normal file
View File

@ -0,0 +1,506 @@
// SPDX-License-Identifier: GPL-2.0
//
// Copyright (C) 2018 Socionext Inc.
// Author: Masahiro Yamada <yamada.masahiro@socionext.com>
#include <linux/bits.h>
#include <linux/clk.h>
#include <linux/dma-mapping.h>
#include <linux/dmaengine.h>
#include <linux/interrupt.h>
#include <linux/iopoll.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_dma.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/types.h>
#include "virt-dma.h"
/* registers common for all channels */
#define UNIPHIER_MDMAC_CMD 0x000 /* issue DMA start/abort */
#define UNIPHIER_MDMAC_CMD_ABORT BIT(31) /* 1: abort, 0: start */
/* per-channel registers */
#define UNIPHIER_MDMAC_CH_OFFSET 0x100
#define UNIPHIER_MDMAC_CH_STRIDE 0x040
#define UNIPHIER_MDMAC_CH_IRQ_STAT 0x010 /* current hw status (RO) */
#define UNIPHIER_MDMAC_CH_IRQ_REQ 0x014 /* latched STAT (WOC) */
#define UNIPHIER_MDMAC_CH_IRQ_EN 0x018 /* IRQ enable mask */
#define UNIPHIER_MDMAC_CH_IRQ_DET 0x01c /* REQ & EN (RO) */
#define UNIPHIER_MDMAC_CH_IRQ__ABORT BIT(13)
#define UNIPHIER_MDMAC_CH_IRQ__DONE BIT(1)
#define UNIPHIER_MDMAC_CH_SRC_MODE 0x020 /* mode of source */
#define UNIPHIER_MDMAC_CH_DEST_MODE 0x024 /* mode of destination */
#define UNIPHIER_MDMAC_CH_MODE__ADDR_INC (0 << 4)
#define UNIPHIER_MDMAC_CH_MODE__ADDR_DEC (1 << 4)
#define UNIPHIER_MDMAC_CH_MODE__ADDR_FIXED (2 << 4)
#define UNIPHIER_MDMAC_CH_SRC_ADDR 0x028 /* source address */
#define UNIPHIER_MDMAC_CH_DEST_ADDR 0x02c /* destination address */
#define UNIPHIER_MDMAC_CH_SIZE 0x030 /* transfer bytes */
#define UNIPHIER_MDMAC_SLAVE_BUSWIDTHS \
(BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) | \
BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) | \
BIT(DMA_SLAVE_BUSWIDTH_3_BYTES) | \
BIT(DMA_SLAVE_BUSWIDTH_4_BYTES))
struct uniphier_mdmac_desc {
struct virt_dma_desc vd;
struct scatterlist *sgl;
unsigned int sg_len;
unsigned int sg_cur;
enum dma_transfer_direction dir;
};
struct uniphier_mdmac_chan {
struct virt_dma_chan vc;
struct uniphier_mdmac_device *mdev;
struct uniphier_mdmac_desc *md;
void __iomem *reg_ch_base;
unsigned int chan_id;
};
struct uniphier_mdmac_device {
struct dma_device ddev;
struct clk *clk;
void __iomem *reg_base;
struct uniphier_mdmac_chan channels[0];
};
static struct uniphier_mdmac_chan *
to_uniphier_mdmac_chan(struct virt_dma_chan *vc)
{
return container_of(vc, struct uniphier_mdmac_chan, vc);
}
static struct uniphier_mdmac_desc *
to_uniphier_mdmac_desc(struct virt_dma_desc *vd)
{
return container_of(vd, struct uniphier_mdmac_desc, vd);
}
/* mc->vc.lock must be held by caller */
static struct uniphier_mdmac_desc *
uniphier_mdmac_next_desc(struct uniphier_mdmac_chan *mc)
{
struct virt_dma_desc *vd;
vd = vchan_next_desc(&mc->vc);
if (!vd) {
mc->md = NULL;
return NULL;
}
list_del(&vd->node);
mc->md = to_uniphier_mdmac_desc(vd);
return mc->md;
}
/* mc->vc.lock must be held by caller */
static void uniphier_mdmac_handle(struct uniphier_mdmac_chan *mc,
struct uniphier_mdmac_desc *md)
{
struct uniphier_mdmac_device *mdev = mc->mdev;
struct scatterlist *sg;
u32 irq_flag = UNIPHIER_MDMAC_CH_IRQ__DONE;
u32 src_mode, src_addr, dest_mode, dest_addr, chunk_size;
sg = &md->sgl[md->sg_cur];
if (md->dir == DMA_MEM_TO_DEV) {
src_mode = UNIPHIER_MDMAC_CH_MODE__ADDR_INC;
src_addr = sg_dma_address(sg);
dest_mode = UNIPHIER_MDMAC_CH_MODE__ADDR_FIXED;
dest_addr = 0;
} else {
src_mode = UNIPHIER_MDMAC_CH_MODE__ADDR_FIXED;
src_addr = 0;
dest_mode = UNIPHIER_MDMAC_CH_MODE__ADDR_INC;
dest_addr = sg_dma_address(sg);
}
chunk_size = sg_dma_len(sg);
writel(src_mode, mc->reg_ch_base + UNIPHIER_MDMAC_CH_SRC_MODE);
writel(dest_mode, mc->reg_ch_base + UNIPHIER_MDMAC_CH_DEST_MODE);
writel(src_addr, mc->reg_ch_base + UNIPHIER_MDMAC_CH_SRC_ADDR);
writel(dest_addr, mc->reg_ch_base + UNIPHIER_MDMAC_CH_DEST_ADDR);
writel(chunk_size, mc->reg_ch_base + UNIPHIER_MDMAC_CH_SIZE);
/* write 1 to clear */
writel(irq_flag, mc->reg_ch_base + UNIPHIER_MDMAC_CH_IRQ_REQ);
writel(irq_flag, mc->reg_ch_base + UNIPHIER_MDMAC_CH_IRQ_EN);
writel(BIT(mc->chan_id), mdev->reg_base + UNIPHIER_MDMAC_CMD);
}
/* mc->vc.lock must be held by caller */
static void uniphier_mdmac_start(struct uniphier_mdmac_chan *mc)
{
struct uniphier_mdmac_desc *md;
md = uniphier_mdmac_next_desc(mc);
if (md)
uniphier_mdmac_handle(mc, md);
}
/* mc->vc.lock must be held by caller */
static int uniphier_mdmac_abort(struct uniphier_mdmac_chan *mc)
{
struct uniphier_mdmac_device *mdev = mc->mdev;
u32 irq_flag = UNIPHIER_MDMAC_CH_IRQ__ABORT;
u32 val;
/* write 1 to clear */
writel(irq_flag, mc->reg_ch_base + UNIPHIER_MDMAC_CH_IRQ_REQ);
writel(UNIPHIER_MDMAC_CMD_ABORT | BIT(mc->chan_id),
mdev->reg_base + UNIPHIER_MDMAC_CMD);
/*
* Abort should be accepted soon. We poll the bit here instead of
* waiting for the interrupt.
*/
return readl_poll_timeout(mc->reg_ch_base + UNIPHIER_MDMAC_CH_IRQ_REQ,
val, val & irq_flag, 0, 20);
}
static irqreturn_t uniphier_mdmac_interrupt(int irq, void *dev_id)
{
struct uniphier_mdmac_chan *mc = dev_id;
struct uniphier_mdmac_desc *md;
irqreturn_t ret = IRQ_HANDLED;
u32 irq_stat;
spin_lock(&mc->vc.lock);
irq_stat = readl(mc->reg_ch_base + UNIPHIER_MDMAC_CH_IRQ_DET);
/*
* Some channels share a single interrupt line. If the IRQ status is 0,
* this is probably triggered by a different channel.
*/
if (!irq_stat) {
ret = IRQ_NONE;
goto out;
}
/* write 1 to clear */
writel(irq_stat, mc->reg_ch_base + UNIPHIER_MDMAC_CH_IRQ_REQ);
/*
* UNIPHIER_MDMAC_CH_IRQ__DONE interrupt is asserted even when the DMA
* is aborted. To distinguish the normal completion and the abort,
* check mc->md. If it is NULL, we are aborting.
*/
md = mc->md;
if (!md)
goto out;
md->sg_cur++;
if (md->sg_cur >= md->sg_len) {
vchan_cookie_complete(&md->vd);
md = uniphier_mdmac_next_desc(mc);
if (!md)
goto out;
}
uniphier_mdmac_handle(mc, md);
out:
spin_unlock(&mc->vc.lock);
return ret;
}
static void uniphier_mdmac_free_chan_resources(struct dma_chan *chan)
{
vchan_free_chan_resources(to_virt_chan(chan));
}
static struct dma_async_tx_descriptor *
uniphier_mdmac_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
unsigned int sg_len,
enum dma_transfer_direction direction,
unsigned long flags, void *context)
{
struct virt_dma_chan *vc = to_virt_chan(chan);
struct uniphier_mdmac_desc *md;
if (!is_slave_direction(direction))
return NULL;
md = kzalloc(sizeof(*md), GFP_NOWAIT);
if (!md)
return NULL;
md->sgl = sgl;
md->sg_len = sg_len;
md->dir = direction;
return vchan_tx_prep(vc, &md->vd, flags);
}
static int uniphier_mdmac_terminate_all(struct dma_chan *chan)
{
struct virt_dma_chan *vc = to_virt_chan(chan);
struct uniphier_mdmac_chan *mc = to_uniphier_mdmac_chan(vc);
unsigned long flags;
int ret = 0;
LIST_HEAD(head);
spin_lock_irqsave(&vc->lock, flags);
if (mc->md) {
vchan_terminate_vdesc(&mc->md->vd);
mc->md = NULL;
ret = uniphier_mdmac_abort(mc);
}
vchan_get_all_descriptors(vc, &head);
spin_unlock_irqrestore(&vc->lock, flags);
vchan_dma_desc_free_list(vc, &head);
return ret;
}
static void uniphier_mdmac_synchronize(struct dma_chan *chan)
{
vchan_synchronize(to_virt_chan(chan));
}
static enum dma_status uniphier_mdmac_tx_status(struct dma_chan *chan,
dma_cookie_t cookie,
struct dma_tx_state *txstate)
{
struct virt_dma_chan *vc;
struct virt_dma_desc *vd;
struct uniphier_mdmac_chan *mc;
struct uniphier_mdmac_desc *md = NULL;
enum dma_status stat;
unsigned long flags;
int i;
stat = dma_cookie_status(chan, cookie, txstate);
/* Return immediately if we do not need to compute the residue. */
if (stat == DMA_COMPLETE || !txstate)
return stat;
vc = to_virt_chan(chan);
spin_lock_irqsave(&vc->lock, flags);
mc = to_uniphier_mdmac_chan(vc);
if (mc->md && mc->md->vd.tx.cookie == cookie) {
/* residue from the on-flight chunk */
txstate->residue = readl(mc->reg_ch_base +
UNIPHIER_MDMAC_CH_SIZE);
md = mc->md;
}
if (!md) {
vd = vchan_find_desc(vc, cookie);
if (vd)
md = to_uniphier_mdmac_desc(vd);
}
if (md) {
/* residue from the queued chunks */
for (i = md->sg_cur; i < md->sg_len; i++)
txstate->residue += sg_dma_len(&md->sgl[i]);
}
spin_unlock_irqrestore(&vc->lock, flags);
return stat;
}
static void uniphier_mdmac_issue_pending(struct dma_chan *chan)
{
struct virt_dma_chan *vc = to_virt_chan(chan);
struct uniphier_mdmac_chan *mc = to_uniphier_mdmac_chan(vc);
unsigned long flags;
spin_lock_irqsave(&vc->lock, flags);
if (vchan_issue_pending(vc) && !mc->md)
uniphier_mdmac_start(mc);
spin_unlock_irqrestore(&vc->lock, flags);
}
static void uniphier_mdmac_desc_free(struct virt_dma_desc *vd)
{
kfree(to_uniphier_mdmac_desc(vd));
}
static int uniphier_mdmac_chan_init(struct platform_device *pdev,
struct uniphier_mdmac_device *mdev,
int chan_id)
{
struct device *dev = &pdev->dev;
struct uniphier_mdmac_chan *mc = &mdev->channels[chan_id];
char *irq_name;
int irq, ret;
irq = platform_get_irq(pdev, chan_id);
if (irq < 0) {
dev_err(&pdev->dev, "failed to get IRQ number for ch%d\n",
chan_id);
return irq;
}
irq_name = devm_kasprintf(dev, GFP_KERNEL, "uniphier-mio-dmac-ch%d",
chan_id);
if (!irq_name)
return -ENOMEM;
ret = devm_request_irq(dev, irq, uniphier_mdmac_interrupt,
IRQF_SHARED, irq_name, mc);
if (ret)
return ret;
mc->mdev = mdev;
mc->reg_ch_base = mdev->reg_base + UNIPHIER_MDMAC_CH_OFFSET +
UNIPHIER_MDMAC_CH_STRIDE * chan_id;
mc->chan_id = chan_id;
mc->vc.desc_free = uniphier_mdmac_desc_free;
vchan_init(&mc->vc, &mdev->ddev);
return 0;
}
static int uniphier_mdmac_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct uniphier_mdmac_device *mdev;
struct dma_device *ddev;
struct resource *res;
int nr_chans, ret, i;
nr_chans = platform_irq_count(pdev);
if (nr_chans < 0)
return nr_chans;
ret = dma_set_mask(dev, DMA_BIT_MASK(32));
if (ret)
return ret;
mdev = devm_kzalloc(dev, struct_size(mdev, channels, nr_chans),
GFP_KERNEL);
if (!mdev)
return -ENOMEM;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
mdev->reg_base = devm_ioremap_resource(dev, res);
if (IS_ERR(mdev->reg_base))
return PTR_ERR(mdev->reg_base);
mdev->clk = devm_clk_get(dev, NULL);
if (IS_ERR(mdev->clk)) {
dev_err(dev, "failed to get clock\n");
return PTR_ERR(mdev->clk);
}
ret = clk_prepare_enable(mdev->clk);
if (ret)
return ret;
ddev = &mdev->ddev;
ddev->dev = dev;
dma_cap_set(DMA_PRIVATE, ddev->cap_mask);
ddev->src_addr_widths = UNIPHIER_MDMAC_SLAVE_BUSWIDTHS;
ddev->dst_addr_widths = UNIPHIER_MDMAC_SLAVE_BUSWIDTHS;
ddev->directions = BIT(DMA_MEM_TO_DEV) | BIT(DMA_DEV_TO_MEM);
ddev->residue_granularity = DMA_RESIDUE_GRANULARITY_SEGMENT;
ddev->device_free_chan_resources = uniphier_mdmac_free_chan_resources;
ddev->device_prep_slave_sg = uniphier_mdmac_prep_slave_sg;
ddev->device_terminate_all = uniphier_mdmac_terminate_all;
ddev->device_synchronize = uniphier_mdmac_synchronize;
ddev->device_tx_status = uniphier_mdmac_tx_status;
ddev->device_issue_pending = uniphier_mdmac_issue_pending;
INIT_LIST_HEAD(&ddev->channels);
for (i = 0; i < nr_chans; i++) {
ret = uniphier_mdmac_chan_init(pdev, mdev, i);
if (ret)
goto disable_clk;
}
ret = dma_async_device_register(ddev);
if (ret)
goto disable_clk;
ret = of_dma_controller_register(dev->of_node, of_dma_xlate_by_chan_id,
ddev);
if (ret)
goto unregister_dmac;
platform_set_drvdata(pdev, mdev);
return 0;
unregister_dmac:
dma_async_device_unregister(ddev);
disable_clk:
clk_disable_unprepare(mdev->clk);
return ret;
}
static int uniphier_mdmac_remove(struct platform_device *pdev)
{
struct uniphier_mdmac_device *mdev = platform_get_drvdata(pdev);
struct dma_chan *chan;
int ret;
/*
* Before reaching here, almost all descriptors have been freed by the
* ->device_free_chan_resources() hook. However, each channel might
* be still holding one descriptor that was on-flight at that moment.
* Terminate it to make sure this hardware is no longer running. Then,
* free the channel resources once again to avoid memory leak.
*/
list_for_each_entry(chan, &mdev->ddev.channels, device_node) {
ret = dmaengine_terminate_sync(chan);
if (ret)
return ret;
uniphier_mdmac_free_chan_resources(chan);
}
of_dma_controller_free(pdev->dev.of_node);
dma_async_device_unregister(&mdev->ddev);
clk_disable_unprepare(mdev->clk);
return 0;
}
static const struct of_device_id uniphier_mdmac_match[] = {
{ .compatible = "socionext,uniphier-mio-dmac" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, uniphier_mdmac_match);
static struct platform_driver uniphier_mdmac_driver = {
.probe = uniphier_mdmac_probe,
.remove = uniphier_mdmac_remove,
.driver = {
.name = "uniphier-mio-dmac",
.of_match_table = uniphier_mdmac_match,
},
};
module_platform_driver(uniphier_mdmac_driver);
MODULE_AUTHOR("Masahiro Yamada <yamada.masahiro@socionext.com>");
MODULE_DESCRIPTION("UniPhier MIO DMAC driver");
MODULE_LICENSE("GPL v2");

44
drivers/dma/xilinx/xilinx_dma.c
View File

@ -190,6 +190,8 @@
/* AXI CDMA Specific Masks */
#define XILINX_CDMA_CR_SGMODE BIT(3)
#define xilinx_prep_dma_addr_t(addr) \
((dma_addr_t)((u64)addr##_##msb << 32 | (addr)))
/**
* struct xilinx_vdma_desc_hw - Hardware Descriptor
* @next_desc: Next Descriptor Pointer @0x00
@ -887,6 +889,24 @@ static int xilinx_dma_alloc_chan_resources(struct dma_chan *dchan)
chan->id);
return -ENOMEM;
}
/*
* 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 = 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");
dma_free_coherent(chan->dev, sizeof(*chan->seg_v) *
XILINX_DMA_NUM_DESCS, chan->seg_v,
chan->seg_p);
return -ENOMEM;
}
chan->cyclic_seg_v->phys = chan->cyclic_seg_p;
for (i = 0; i < XILINX_DMA_NUM_DESCS; i++) {
chan->seg_v[i].hw.next_desc =
@ -922,24 +942,6 @@ static int xilinx_dma_alloc_chan_resources(struct dma_chan *dchan)
return -ENOMEM;
}
if (chan->xdev->dma_config->dmatype == XDMA_TYPE_AXIDMA) {
/*
* 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 = 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);
if (chan->xdev->dma_config->dmatype == XDMA_TYPE_AXIDMA) {
@ -1245,8 +1247,10 @@ static void xilinx_cdma_start_transfer(struct xilinx_dma_chan *chan)
hw = &segment->hw;
xilinx_write(chan, XILINX_CDMA_REG_SRCADDR, hw->src_addr);
xilinx_write(chan, XILINX_CDMA_REG_DSTADDR, hw->dest_addr);
xilinx_write(chan, XILINX_CDMA_REG_SRCADDR,
xilinx_prep_dma_addr_t(hw->src_addr));
xilinx_write(chan, XILINX_CDMA_REG_DSTADDR,
xilinx_prep_dma_addr_t(hw->dest_addr));
/* Start the transfer */
dma_ctrl_write(chan, XILINX_DMA_REG_BTT,

39
drivers/dma/xilinx/zynqmp_dma.c
View File

@ -163,7 +163,7 @@ struct zynqmp_dma_desc_ll {
u32 ctrl;
u64 nxtdscraddr;
u64 rsvd;
}; __aligned(64)
};
/**
* struct zynqmp_dma_desc_sw - Per Transaction structure
@ -375,9 +375,10 @@ static dma_cookie_t zynqmp_dma_tx_submit(struct dma_async_tx_descriptor *tx)
struct zynqmp_dma_chan *chan = to_chan(tx->chan);
struct zynqmp_dma_desc_sw *desc, *new;
dma_cookie_t cookie;
unsigned long irqflags;
new = tx_to_desc(tx);
spin_lock_bh(&chan->lock);
spin_lock_irqsave(&chan->lock, irqflags);
cookie = dma_cookie_assign(tx);
if (!list_empty(&chan->pending_list)) {
@ -393,7 +394,7 @@ static dma_cookie_t zynqmp_dma_tx_submit(struct dma_async_tx_descriptor *tx)
}
list_add_tail(&new->node, &chan->pending_list);
spin_unlock_bh(&chan->lock);
spin_unlock_irqrestore(&chan->lock, irqflags);
return cookie;
}
@ -408,12 +409,13 @@ static struct zynqmp_dma_desc_sw *
zynqmp_dma_get_descriptor(struct zynqmp_dma_chan *chan)
{
struct zynqmp_dma_desc_sw *desc;
unsigned long irqflags;
spin_lock_bh(&chan->lock);
spin_lock_irqsave(&chan->lock, irqflags);
desc = list_first_entry(&chan->free_list,
struct zynqmp_dma_desc_sw, node);
list_del(&desc->node);
spin_unlock_bh(&chan->lock);
spin_unlock_irqrestore(&chan->lock, irqflags);
INIT_LIST_HEAD(&desc->tx_list);
/* Clear the src and dst descriptor memory */
@ -643,10 +645,11 @@ static void zynqmp_dma_complete_descriptor(struct zynqmp_dma_chan *chan)
static void zynqmp_dma_issue_pending(struct dma_chan *dchan)
{
struct zynqmp_dma_chan *chan = to_chan(dchan);
unsigned long irqflags;
spin_lock_bh(&chan->lock);
spin_lock_irqsave(&chan->lock, irqflags);
zynqmp_dma_start_transfer(chan);
spin_unlock_bh(&chan->lock);
spin_unlock_irqrestore(&chan->lock, irqflags);
}
/**
@ -667,10 +670,11 @@ static void zynqmp_dma_free_descriptors(struct zynqmp_dma_chan *chan)
static void zynqmp_dma_free_chan_resources(struct dma_chan *dchan)
{
struct zynqmp_dma_chan *chan = to_chan(dchan);
unsigned long irqflags;
spin_lock_bh(&chan->lock);
spin_lock_irqsave(&chan->lock, irqflags);
zynqmp_dma_free_descriptors(chan);
spin_unlock_bh(&chan->lock);
spin_unlock_irqrestore(&chan->lock, irqflags);
dma_free_coherent(chan->dev,
(2 * ZYNQMP_DMA_DESC_SIZE(chan) * ZYNQMP_DMA_NUM_DESCS),
chan->desc_pool_v, chan->desc_pool_p);
@ -743,8 +747,9 @@ static void zynqmp_dma_do_tasklet(unsigned long data)
{
struct zynqmp_dma_chan *chan = (struct zynqmp_dma_chan *)data;
u32 count;
unsigned long irqflags;
spin_lock(&chan->lock);
spin_lock_irqsave(&chan->lock, irqflags);
if (chan->err) {
zynqmp_dma_reset(chan);
@ -764,7 +769,7 @@ static void zynqmp_dma_do_tasklet(unsigned long data)
zynqmp_dma_start_transfer(chan);
unlock:
spin_unlock(&chan->lock);
spin_unlock_irqrestore(&chan->lock, irqflags);
}
/**
@ -776,11 +781,12 @@ unlock:
static int zynqmp_dma_device_terminate_all(struct dma_chan *dchan)
{
struct zynqmp_dma_chan *chan = to_chan(dchan);
unsigned long irqflags;
spin_lock_bh(&chan->lock);
spin_lock_irqsave(&chan->lock, irqflags);
writel(ZYNQMP_DMA_IDS_DEFAULT_MASK, chan->regs + ZYNQMP_DMA_IDS);
zynqmp_dma_free_descriptors(chan);
spin_unlock_bh(&chan->lock);
spin_unlock_irqrestore(&chan->lock, irqflags);
return 0;
}
@ -804,19 +810,20 @@ static struct dma_async_tx_descriptor *zynqmp_dma_prep_memcpy(
void *desc = NULL, *prev = NULL;
size_t copy;
u32 desc_cnt;
unsigned long irqflags;
chan = to_chan(dchan);
desc_cnt = DIV_ROUND_UP(len, ZYNQMP_DMA_MAX_TRANS_LEN);
spin_lock_bh(&chan->lock);
spin_lock_irqsave(&chan->lock, irqflags);
if (desc_cnt > chan->desc_free_cnt) {
spin_unlock_bh(&chan->lock);
spin_unlock_irqrestore(&chan->lock, irqflags);
dev_dbg(chan->dev, "chan %p descs are not available\n", chan);
return NULL;
}
chan->desc_free_cnt = chan->desc_free_cnt - desc_cnt;
spin_unlock_bh(&chan->lock);
spin_unlock_irqrestore(&chan->lock, irqflags);
do {
/* Allocate and populate the descriptor */

14
include/dt-bindings/dma/dw-dmac.h Normal file
View File

@ -0,0 +1,14 @@
/* SPDX-License-Identifier: (GPL-2.0 OR MIT) */
#ifndef __DT_BINDINGS_DMA_DW_DMAC_H__
#define __DT_BINDINGS_DMA_DW_DMAC_H__
/*
* Protection Control bits provide protection against illegal transactions.
* The protection bits[0:2] are one-to-one mapped to AHB HPROT[3:1] signals.
*/
#define DW_DMAC_HPROT1_PRIVILEGED_MODE (1 << 0) /* Privileged Mode */
#define DW_DMAC_HPROT2_BUFFERABLE (1 << 1) /* DMA is bufferable */
#define DW_DMAC_HPROT3_CACHEABLE (1 << 2) /* DMA is cacheable */
#endif /* __DT_BINDINGS_DMA_DW_DMAC_H__ */

62
include/linux/dma/sprd-dma.h
View File

@ -3,9 +3,65 @@
#ifndef _SPRD_DMA_H_
#define _SPRD_DMA_H_
#define SPRD_DMA_REQ_SHIFT 16
#define SPRD_DMA_FLAGS(req_mode, int_type) \
((req_mode) << SPRD_DMA_REQ_SHIFT | (int_type))
#define SPRD_DMA_REQ_SHIFT 8
#define SPRD_DMA_TRG_MODE_SHIFT 16
#define SPRD_DMA_CHN_MODE_SHIFT 24
#define SPRD_DMA_FLAGS(chn_mode, trg_mode, req_mode, int_type) \
((chn_mode) << SPRD_DMA_CHN_MODE_SHIFT | \
(trg_mode) << SPRD_DMA_TRG_MODE_SHIFT | \
(req_mode) << SPRD_DMA_REQ_SHIFT | (int_type))
/*
* The Spreadtrum DMA controller supports channel 2-stage tansfer, that means
* we can request 2 dma channels, one for source channel, and another one for
* destination channel. Each channel is independent, and has its own
* configurations. Once the source channel's transaction is done, it will
* trigger the destination channel's transaction automatically by hardware
* signal.
*
* To support 2-stage tansfer, we must configure the channel mode and trigger
* mode as below definition.
*/
/*
* enum sprd_dma_chn_mode: define the DMA channel mode for 2-stage transfer
* @SPRD_DMA_CHN_MODE_NONE: No channel mode setting which means channel doesn't
* support the 2-stage transfer.
* @SPRD_DMA_SRC_CHN0: Channel used as source channel 0.
* @SPRD_DMA_SRC_CHN1: Channel used as source channel 1.
* @SPRD_DMA_DST_CHN0: Channel used as destination channel 0.
* @SPRD_DMA_DST_CHN1: Channel used as destination channel 1.
*
* Now the DMA controller can supports 2 groups 2-stage transfer.
*/
enum sprd_dma_chn_mode {
SPRD_DMA_CHN_MODE_NONE,
SPRD_DMA_SRC_CHN0,
SPRD_DMA_SRC_CHN1,
SPRD_DMA_DST_CHN0,
SPRD_DMA_DST_CHN1,
};
/*
* enum sprd_dma_trg_mode: define the DMA channel trigger mode for 2-stage
* transfer
* @SPRD_DMA_NO_TRG: No trigger setting.
* @SPRD_DMA_FRAG_DONE_TRG: Trigger the transaction of destination channel
* automatically once the source channel's fragment request is done.
* @SPRD_DMA_BLOCK_DONE_TRG: Trigger the transaction of destination channel
* automatically once the source channel's block request is done.
* @SPRD_DMA_TRANS_DONE_TRG: Trigger the transaction of destination channel
* automatically once the source channel's transfer request is done.
* @SPRD_DMA_LIST_DONE_TRG: Trigger the transaction of destination channel
* automatically once the source channel's link-list request is done.
*/
enum sprd_dma_trg_mode {
SPRD_DMA_NO_TRG,
SPRD_DMA_FRAG_DONE_TRG,
SPRD_DMA_BLOCK_DONE_TRG,
SPRD_DMA_TRANS_DONE_TRG,
SPRD_DMA_LIST_DONE_TRG,
};
/*
* enum sprd_dma_req_mode: define the DMA request mode

6
include/linux/platform_data/dma-dw.h
View File

@ -49,6 +49,7 @@ struct dw_dma_slave {
* @data_width: Maximum data width supported by hardware per AHB master
* (in bytes, power of 2)
* @multi_block: Multi block transfers supported by hardware per channel.
* @protctl: Protection control signals setting per channel.
*/
struct dw_dma_platform_data {
unsigned int nr_channels;
@ -65,6 +66,11 @@ struct dw_dma_platform_data {
unsigned char nr_masters;
unsigned char data_width[DW_DMA_MAX_NR_MASTERS];
unsigned char multi_block[DW_DMA_MAX_NR_CHANNELS];
#define CHAN_PROTCTL_PRIVILEGED BIT(0)
#define CHAN_PROTCTL_BUFFERABLE BIT(1)
#define CHAN_PROTCTL_CACHEABLE BIT(2)
#define CHAN_PROTCTL_MASK GENMASK(2, 0)
unsigned char protctl;
};
#endif /* _PLATFORM_DATA_DMA_DW_H */

24
include/linux/sa11x0-dma.h
View File

@ -1,24 +0,0 @@
/*
* SA11x0 DMA Engine support
*
* Copyright (C) 2012 Russell King
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __LINUX_SA11X0_DMA_H
#define __LINUX_SA11X0_DMA_H
struct dma_chan;
#if defined(CONFIG_DMA_SA11X0) || defined(CONFIG_DMA_SA11X0_MODULE)
bool sa11x0_dma_filter_fn(struct dma_chan *, void *);
#else
static inline bool sa11x0_dma_filter_fn(struct dma_chan *c, void *d)
{
return false;
}
#endif
#endif

7
include/linux/shdma-base.h
View File

@ -1,4 +1,5 @@
/*
/* SPDX-License-Identifier: GPL-2.0
*
* Dmaengine driver base library for DMA controllers, found on SH-based SoCs
*
* extracted from shdma.c and headers
@ -7,10 +8,6 @@
* Copyright (C) 2009 Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com>
* Copyright (C) 2009 Renesas Solutions, Inc. All rights reserved.
* Copyright (C) 2007 Freescale Semiconductor, Inc. All rights reserved.
*
* This is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*/
#ifndef SHDMA_BASE_H