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1361 lines
35 KiB
1361 lines
35 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* DMA Engine test module |
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* |
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* Copyright (C) 2007 Atmel Corporation |
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* Copyright (C) 2013 Intel Corporation |
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*/ |
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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|
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#include <linux/err.h> |
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#include <linux/delay.h> |
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#include <linux/dma-mapping.h> |
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#include <linux/dmaengine.h> |
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#include <linux/freezer.h> |
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#include <linux/init.h> |
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#include <linux/kthread.h> |
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#include <linux/sched/task.h> |
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#include <linux/module.h> |
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#include <linux/moduleparam.h> |
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#include <linux/random.h> |
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#include <linux/slab.h> |
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#include <linux/wait.h> |
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static unsigned int test_buf_size = 16384; |
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module_param(test_buf_size, uint, S_IRUGO | S_IWUSR); |
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MODULE_PARM_DESC(test_buf_size, "Size of the memcpy test buffer"); |
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|
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static char test_device[32]; |
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module_param_string(device, test_device, sizeof(test_device), |
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S_IRUGO | S_IWUSR); |
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MODULE_PARM_DESC(device, "Bus ID of the DMA Engine to test (default: any)"); |
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static unsigned int threads_per_chan = 1; |
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module_param(threads_per_chan, uint, S_IRUGO | S_IWUSR); |
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MODULE_PARM_DESC(threads_per_chan, |
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"Number of threads to start per channel (default: 1)"); |
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|
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static unsigned int max_channels; |
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module_param(max_channels, uint, S_IRUGO | S_IWUSR); |
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MODULE_PARM_DESC(max_channels, |
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"Maximum number of channels to use (default: all)"); |
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|
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static unsigned int iterations; |
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module_param(iterations, uint, S_IRUGO | S_IWUSR); |
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MODULE_PARM_DESC(iterations, |
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"Iterations before stopping test (default: infinite)"); |
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|
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static unsigned int dmatest; |
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module_param(dmatest, uint, S_IRUGO | S_IWUSR); |
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MODULE_PARM_DESC(dmatest, |
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"dmatest 0-memcpy 1-memset (default: 0)"); |
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|
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static unsigned int xor_sources = 3; |
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module_param(xor_sources, uint, S_IRUGO | S_IWUSR); |
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MODULE_PARM_DESC(xor_sources, |
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"Number of xor source buffers (default: 3)"); |
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static unsigned int pq_sources = 3; |
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module_param(pq_sources, uint, S_IRUGO | S_IWUSR); |
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MODULE_PARM_DESC(pq_sources, |
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"Number of p+q source buffers (default: 3)"); |
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static int timeout = 3000; |
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module_param(timeout, int, S_IRUGO | S_IWUSR); |
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MODULE_PARM_DESC(timeout, "Transfer Timeout in msec (default: 3000), " |
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"Pass -1 for infinite timeout"); |
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static bool noverify; |
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module_param(noverify, bool, S_IRUGO | S_IWUSR); |
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MODULE_PARM_DESC(noverify, "Disable data verification (default: verify)"); |
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|
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static bool norandom; |
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module_param(norandom, bool, 0644); |
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MODULE_PARM_DESC(norandom, "Disable random offset setup (default: random)"); |
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static bool verbose; |
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module_param(verbose, bool, S_IRUGO | S_IWUSR); |
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MODULE_PARM_DESC(verbose, "Enable \"success\" result messages (default: off)"); |
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static int alignment = -1; |
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module_param(alignment, int, 0644); |
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MODULE_PARM_DESC(alignment, "Custom data address alignment taken as 2^(alignment) (default: not used (-1))"); |
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static unsigned int transfer_size; |
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module_param(transfer_size, uint, 0644); |
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MODULE_PARM_DESC(transfer_size, "Optional custom transfer size in bytes (default: not used (0))"); |
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static bool polled; |
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module_param(polled, bool, S_IRUGO | S_IWUSR); |
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MODULE_PARM_DESC(polled, "Use polling for completion instead of interrupts"); |
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/** |
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* struct dmatest_params - test parameters. |
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* @buf_size: size of the memcpy test buffer |
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* @channel: bus ID of the channel to test |
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* @device: bus ID of the DMA Engine to test |
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* @threads_per_chan: number of threads to start per channel |
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* @max_channels: maximum number of channels to use |
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* @iterations: iterations before stopping test |
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* @xor_sources: number of xor source buffers |
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* @pq_sources: number of p+q source buffers |
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* @timeout: transfer timeout in msec, -1 for infinite timeout |
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* @noverify: disable data verification |
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* @norandom: disable random offset setup |
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* @alignment: custom data address alignment taken as 2^alignment |
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* @transfer_size: custom transfer size in bytes |
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* @polled: use polling for completion instead of interrupts |
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*/ |
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struct dmatest_params { |
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unsigned int buf_size; |
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char channel[20]; |
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char device[32]; |
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unsigned int threads_per_chan; |
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unsigned int max_channels; |
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unsigned int iterations; |
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unsigned int xor_sources; |
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unsigned int pq_sources; |
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int timeout; |
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bool noverify; |
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bool norandom; |
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int alignment; |
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unsigned int transfer_size; |
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bool polled; |
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}; |
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/** |
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* struct dmatest_info - test information. |
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* @params: test parameters |
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* @channels: channels under test |
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* @nr_channels: number of channels under test |
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* @lock: access protection to the fields of this structure |
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* @did_init: module has been initialized completely |
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* @last_error: test has faced configuration issues |
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*/ |
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static struct dmatest_info { |
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/* Test parameters */ |
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struct dmatest_params params; |
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|
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/* Internal state */ |
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struct list_head channels; |
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unsigned int nr_channels; |
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int last_error; |
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struct mutex lock; |
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bool did_init; |
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} test_info = { |
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.channels = LIST_HEAD_INIT(test_info.channels), |
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.lock = __MUTEX_INITIALIZER(test_info.lock), |
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}; |
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static int dmatest_run_set(const char *val, const struct kernel_param *kp); |
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static int dmatest_run_get(char *val, const struct kernel_param *kp); |
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static const struct kernel_param_ops run_ops = { |
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.set = dmatest_run_set, |
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.get = dmatest_run_get, |
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}; |
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static bool dmatest_run; |
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module_param_cb(run, &run_ops, &dmatest_run, S_IRUGO | S_IWUSR); |
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MODULE_PARM_DESC(run, "Run the test (default: false)"); |
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|
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static int dmatest_chan_set(const char *val, const struct kernel_param *kp); |
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static int dmatest_chan_get(char *val, const struct kernel_param *kp); |
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static const struct kernel_param_ops multi_chan_ops = { |
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.set = dmatest_chan_set, |
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.get = dmatest_chan_get, |
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}; |
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static char test_channel[20]; |
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static struct kparam_string newchan_kps = { |
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.string = test_channel, |
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.maxlen = 20, |
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}; |
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module_param_cb(channel, &multi_chan_ops, &newchan_kps, 0644); |
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MODULE_PARM_DESC(channel, "Bus ID of the channel to test (default: any)"); |
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static int dmatest_test_list_get(char *val, const struct kernel_param *kp); |
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static const struct kernel_param_ops test_list_ops = { |
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.get = dmatest_test_list_get, |
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}; |
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module_param_cb(test_list, &test_list_ops, NULL, 0444); |
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MODULE_PARM_DESC(test_list, "Print current test list"); |
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|
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/* Maximum amount of mismatched bytes in buffer to print */ |
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#define MAX_ERROR_COUNT 32 |
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|
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/* |
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* Initialization patterns. All bytes in the source buffer has bit 7 |
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* set, all bytes in the destination buffer has bit 7 cleared. |
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* |
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* Bit 6 is set for all bytes which are to be copied by the DMA |
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* engine. Bit 5 is set for all bytes which are to be overwritten by |
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* the DMA engine. |
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* |
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* The remaining bits are the inverse of a counter which increments by |
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* one for each byte address. |
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*/ |
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#define PATTERN_SRC 0x80 |
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#define PATTERN_DST 0x00 |
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#define PATTERN_COPY 0x40 |
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#define PATTERN_OVERWRITE 0x20 |
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#define PATTERN_COUNT_MASK 0x1f |
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#define PATTERN_MEMSET_IDX 0x01 |
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|
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/* Fixed point arithmetic ops */ |
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#define FIXPT_SHIFT 8 |
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#define FIXPNT_MASK 0xFF |
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#define FIXPT_TO_INT(a) ((a) >> FIXPT_SHIFT) |
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#define INT_TO_FIXPT(a) ((a) << FIXPT_SHIFT) |
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#define FIXPT_GET_FRAC(a) ((((a) & FIXPNT_MASK) * 100) >> FIXPT_SHIFT) |
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|
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/* poor man's completion - we want to use wait_event_freezable() on it */ |
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struct dmatest_done { |
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bool done; |
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wait_queue_head_t *wait; |
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}; |
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struct dmatest_data { |
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u8 **raw; |
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u8 **aligned; |
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unsigned int cnt; |
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unsigned int off; |
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}; |
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struct dmatest_thread { |
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struct list_head node; |
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struct dmatest_info *info; |
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struct task_struct *task; |
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struct dma_chan *chan; |
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struct dmatest_data src; |
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struct dmatest_data dst; |
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enum dma_transaction_type type; |
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wait_queue_head_t done_wait; |
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struct dmatest_done test_done; |
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bool done; |
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bool pending; |
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}; |
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struct dmatest_chan { |
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struct list_head node; |
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struct dma_chan *chan; |
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struct list_head threads; |
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}; |
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static DECLARE_WAIT_QUEUE_HEAD(thread_wait); |
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static bool wait; |
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static bool is_threaded_test_run(struct dmatest_info *info) |
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{ |
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struct dmatest_chan *dtc; |
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list_for_each_entry(dtc, &info->channels, node) { |
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struct dmatest_thread *thread; |
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list_for_each_entry(thread, &dtc->threads, node) { |
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if (!thread->done && !thread->pending) |
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return true; |
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} |
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} |
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return false; |
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} |
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static bool is_threaded_test_pending(struct dmatest_info *info) |
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{ |
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struct dmatest_chan *dtc; |
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list_for_each_entry(dtc, &info->channels, node) { |
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struct dmatest_thread *thread; |
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list_for_each_entry(thread, &dtc->threads, node) { |
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if (thread->pending) |
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return true; |
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} |
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} |
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return false; |
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} |
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static int dmatest_wait_get(char *val, const struct kernel_param *kp) |
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{ |
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struct dmatest_info *info = &test_info; |
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struct dmatest_params *params = &info->params; |
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if (params->iterations) |
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wait_event(thread_wait, !is_threaded_test_run(info)); |
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wait = true; |
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return param_get_bool(val, kp); |
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} |
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static const struct kernel_param_ops wait_ops = { |
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.get = dmatest_wait_get, |
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.set = param_set_bool, |
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}; |
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module_param_cb(wait, &wait_ops, &wait, S_IRUGO); |
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MODULE_PARM_DESC(wait, "Wait for tests to complete (default: false)"); |
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static bool dmatest_match_channel(struct dmatest_params *params, |
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struct dma_chan *chan) |
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{ |
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if (params->channel[0] == '\0') |
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return true; |
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return strcmp(dma_chan_name(chan), params->channel) == 0; |
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} |
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static bool dmatest_match_device(struct dmatest_params *params, |
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struct dma_device *device) |
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{ |
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if (params->device[0] == '\0') |
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return true; |
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return strcmp(dev_name(device->dev), params->device) == 0; |
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} |
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static unsigned long dmatest_random(void) |
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{ |
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unsigned long buf; |
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prandom_bytes(&buf, sizeof(buf)); |
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return buf; |
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} |
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static inline u8 gen_inv_idx(u8 index, bool is_memset) |
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{ |
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u8 val = is_memset ? PATTERN_MEMSET_IDX : index; |
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return ~val & PATTERN_COUNT_MASK; |
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} |
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static inline u8 gen_src_value(u8 index, bool is_memset) |
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{ |
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return PATTERN_SRC | gen_inv_idx(index, is_memset); |
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} |
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static inline u8 gen_dst_value(u8 index, bool is_memset) |
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{ |
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return PATTERN_DST | gen_inv_idx(index, is_memset); |
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} |
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static void dmatest_init_srcs(u8 **bufs, unsigned int start, unsigned int len, |
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unsigned int buf_size, bool is_memset) |
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{ |
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unsigned int i; |
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u8 *buf; |
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for (; (buf = *bufs); bufs++) { |
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for (i = 0; i < start; i++) |
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buf[i] = gen_src_value(i, is_memset); |
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for ( ; i < start + len; i++) |
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buf[i] = gen_src_value(i, is_memset) | PATTERN_COPY; |
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for ( ; i < buf_size; i++) |
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buf[i] = gen_src_value(i, is_memset); |
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buf++; |
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} |
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} |
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|
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static void dmatest_init_dsts(u8 **bufs, unsigned int start, unsigned int len, |
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unsigned int buf_size, bool is_memset) |
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{ |
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unsigned int i; |
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u8 *buf; |
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for (; (buf = *bufs); bufs++) { |
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for (i = 0; i < start; i++) |
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buf[i] = gen_dst_value(i, is_memset); |
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for ( ; i < start + len; i++) |
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buf[i] = gen_dst_value(i, is_memset) | |
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PATTERN_OVERWRITE; |
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for ( ; i < buf_size; i++) |
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buf[i] = gen_dst_value(i, is_memset); |
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} |
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} |
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|
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static void dmatest_mismatch(u8 actual, u8 pattern, unsigned int index, |
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unsigned int counter, bool is_srcbuf, bool is_memset) |
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{ |
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u8 diff = actual ^ pattern; |
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u8 expected = pattern | gen_inv_idx(counter, is_memset); |
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const char *thread_name = current->comm; |
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|
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if (is_srcbuf) |
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pr_warn("%s: srcbuf[0x%x] overwritten! Expected %02x, got %02x\n", |
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thread_name, index, expected, actual); |
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else if ((pattern & PATTERN_COPY) |
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&& (diff & (PATTERN_COPY | PATTERN_OVERWRITE))) |
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pr_warn("%s: dstbuf[0x%x] not copied! Expected %02x, got %02x\n", |
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thread_name, index, expected, actual); |
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else if (diff & PATTERN_SRC) |
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pr_warn("%s: dstbuf[0x%x] was copied! Expected %02x, got %02x\n", |
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thread_name, index, expected, actual); |
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else |
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pr_warn("%s: dstbuf[0x%x] mismatch! Expected %02x, got %02x\n", |
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thread_name, index, expected, actual); |
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} |
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|
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static unsigned int dmatest_verify(u8 **bufs, unsigned int start, |
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unsigned int end, unsigned int counter, u8 pattern, |
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bool is_srcbuf, bool is_memset) |
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{ |
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unsigned int i; |
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unsigned int error_count = 0; |
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u8 actual; |
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u8 expected; |
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u8 *buf; |
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unsigned int counter_orig = counter; |
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|
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for (; (buf = *bufs); bufs++) { |
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counter = counter_orig; |
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for (i = start; i < end; i++) { |
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actual = buf[i]; |
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expected = pattern | gen_inv_idx(counter, is_memset); |
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if (actual != expected) { |
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if (error_count < MAX_ERROR_COUNT) |
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dmatest_mismatch(actual, pattern, i, |
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counter, is_srcbuf, |
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is_memset); |
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error_count++; |
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} |
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counter++; |
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} |
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} |
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|
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if (error_count > MAX_ERROR_COUNT) |
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pr_warn("%s: %u errors suppressed\n", |
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current->comm, error_count - MAX_ERROR_COUNT); |
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|
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return error_count; |
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} |
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|
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|
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static void dmatest_callback(void *arg) |
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{ |
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struct dmatest_done *done = arg; |
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struct dmatest_thread *thread = |
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container_of(done, struct dmatest_thread, test_done); |
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if (!thread->done) { |
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done->done = true; |
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wake_up_all(done->wait); |
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} else { |
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/* |
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* If thread->done, it means that this callback occurred |
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* after the parent thread has cleaned up. This can |
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* happen in the case that driver doesn't implement |
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* the terminate_all() functionality and a dma operation |
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* did not occur within the timeout period |
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*/ |
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WARN(1, "dmatest: Kernel memory may be corrupted!!\n"); |
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} |
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} |
|
|
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static unsigned int min_odd(unsigned int x, unsigned int y) |
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{ |
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unsigned int val = min(x, y); |
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|
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return val % 2 ? val : val - 1; |
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} |
|
|
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static void result(const char *err, unsigned int n, unsigned int src_off, |
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unsigned int dst_off, unsigned int len, unsigned long data) |
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{ |
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if (IS_ERR_VALUE(data)) { |
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pr_info("%s: result #%u: '%s' with src_off=0x%x dst_off=0x%x len=0x%x (%ld)\n", |
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current->comm, n, err, src_off, dst_off, len, data); |
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} else { |
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pr_info("%s: result #%u: '%s' with src_off=0x%x dst_off=0x%x len=0x%x (%lu)\n", |
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current->comm, n, err, src_off, dst_off, len, data); |
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} |
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} |
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|
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static void dbg_result(const char *err, unsigned int n, unsigned int src_off, |
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unsigned int dst_off, unsigned int len, |
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unsigned long data) |
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{ |
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pr_debug("%s: result #%u: '%s' with src_off=0x%x dst_off=0x%x len=0x%x (%lu)\n", |
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current->comm, n, err, src_off, dst_off, len, data); |
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} |
|
|
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#define verbose_result(err, n, src_off, dst_off, len, data) ({ \ |
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if (verbose) \ |
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result(err, n, src_off, dst_off, len, data); \ |
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else \ |
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dbg_result(err, n, src_off, dst_off, len, data);\ |
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}) |
|
|
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static unsigned long long dmatest_persec(s64 runtime, unsigned int val) |
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{ |
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unsigned long long per_sec = 1000000; |
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|
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if (runtime <= 0) |
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return 0; |
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|
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/* drop precision until runtime is 32-bits */ |
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while (runtime > UINT_MAX) { |
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runtime >>= 1; |
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per_sec <<= 1; |
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} |
|
|
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per_sec *= val; |
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per_sec = INT_TO_FIXPT(per_sec); |
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do_div(per_sec, runtime); |
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|
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return per_sec; |
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} |
|
|
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static unsigned long long dmatest_KBs(s64 runtime, unsigned long long len) |
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{ |
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return FIXPT_TO_INT(dmatest_persec(runtime, len >> 10)); |
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} |
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|
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static void __dmatest_free_test_data(struct dmatest_data *d, unsigned int cnt) |
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{ |
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unsigned int i; |
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|
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for (i = 0; i < cnt; i++) |
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kfree(d->raw[i]); |
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|
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kfree(d->aligned); |
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kfree(d->raw); |
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} |
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|
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static void dmatest_free_test_data(struct dmatest_data *d) |
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{ |
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__dmatest_free_test_data(d, d->cnt); |
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} |
|
|
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static int dmatest_alloc_test_data(struct dmatest_data *d, |
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unsigned int buf_size, u8 align) |
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{ |
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unsigned int i = 0; |
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|
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d->raw = kcalloc(d->cnt + 1, sizeof(u8 *), GFP_KERNEL); |
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if (!d->raw) |
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return -ENOMEM; |
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|
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d->aligned = kcalloc(d->cnt + 1, sizeof(u8 *), GFP_KERNEL); |
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if (!d->aligned) |
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goto err; |
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|
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for (i = 0; i < d->cnt; i++) { |
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d->raw[i] = kmalloc(buf_size + align, GFP_KERNEL); |
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if (!d->raw[i]) |
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goto err; |
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|
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/* align to alignment restriction */ |
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if (align) |
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d->aligned[i] = PTR_ALIGN(d->raw[i], align); |
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else |
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d->aligned[i] = d->raw[i]; |
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} |
|
|
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return 0; |
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err: |
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__dmatest_free_test_data(d, i); |
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return -ENOMEM; |
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} |
|
|
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/* |
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* This function repeatedly tests DMA transfers of various lengths and |
|
* offsets for a given operation type until it is told to exit by |
|
* kthread_stop(). There may be multiple threads running this function |
|
* in parallel for a single channel, and there may be multiple channels |
|
* being tested in parallel. |
|
* |
|
* Before each test, the source and destination buffer is initialized |
|
* with a known pattern. This pattern is different depending on |
|
* whether it's in an area which is supposed to be copied or |
|
* overwritten, and different in the source and destination buffers. |
|
* So if the DMA engine doesn't copy exactly what we tell it to copy, |
|
* we'll notice. |
|
*/ |
|
static int dmatest_func(void *data) |
|
{ |
|
struct dmatest_thread *thread = data; |
|
struct dmatest_done *done = &thread->test_done; |
|
struct dmatest_info *info; |
|
struct dmatest_params *params; |
|
struct dma_chan *chan; |
|
struct dma_device *dev; |
|
struct device *dma_dev; |
|
unsigned int error_count; |
|
unsigned int failed_tests = 0; |
|
unsigned int total_tests = 0; |
|
dma_cookie_t cookie; |
|
enum dma_status status; |
|
enum dma_ctrl_flags flags; |
|
u8 *pq_coefs = NULL; |
|
int ret; |
|
unsigned int buf_size; |
|
struct dmatest_data *src; |
|
struct dmatest_data *dst; |
|
int i; |
|
ktime_t ktime, start, diff; |
|
ktime_t filltime = 0; |
|
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; |
|
dma_addr_t *dma_pq; |
|
|
|
set_freezable(); |
|
|
|
ret = -ENOMEM; |
|
|
|
smp_rmb(); |
|
thread->pending = false; |
|
info = thread->info; |
|
params = &info->params; |
|
chan = thread->chan; |
|
dev = chan->device; |
|
dma_dev = dmaengine_get_dma_device(chan); |
|
|
|
src = &thread->src; |
|
dst = &thread->dst; |
|
if (thread->type == DMA_MEMCPY) { |
|
align = params->alignment < 0 ? dev->copy_align : |
|
params->alignment; |
|
src->cnt = dst->cnt = 1; |
|
} else if (thread->type == DMA_MEMSET) { |
|
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 = 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 = params->alignment < 0 ? dev->pq_align : |
|
params->alignment; |
|
|
|
pq_coefs = kmalloc(params->pq_sources + 1, GFP_KERNEL); |
|
if (!pq_coefs) |
|
goto err_thread_type; |
|
|
|
for (i = 0; i < src->cnt; i++) |
|
pq_coefs[i] = 1; |
|
} 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; |
|
} |
|
|
|
buf_size = params->buf_size; |
|
if (1 << align > buf_size) { |
|
pr_err("%u-byte buffer too small for %d-byte alignment\n", |
|
buf_size, 1 << align); |
|
goto err_free_coefs; |
|
} |
|
|
|
if (dmatest_alloc_test_data(src, buf_size, align) < 0) |
|
goto err_free_coefs; |
|
|
|
if (dmatest_alloc_test_data(dst, buf_size, align) < 0) |
|
goto err_src; |
|
|
|
set_user_nice(current, 10); |
|
|
|
srcs = kcalloc(src->cnt, sizeof(dma_addr_t), GFP_KERNEL); |
|
if (!srcs) |
|
goto err_dst; |
|
|
|
dma_pq = kcalloc(dst->cnt, sizeof(dma_addr_t), GFP_KERNEL); |
|
if (!dma_pq) |
|
goto err_srcs_array; |
|
|
|
/* |
|
* src and dst buffers are freed by ourselves below |
|
*/ |
|
if (params->polled) |
|
flags = DMA_CTRL_ACK; |
|
else |
|
flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT; |
|
|
|
ktime = ktime_get(); |
|
while (!(kthread_should_stop() || |
|
(params->iterations && total_tests >= params->iterations))) { |
|
struct dma_async_tx_descriptor *tx = NULL; |
|
struct dmaengine_unmap_data *um; |
|
dma_addr_t *dsts; |
|
unsigned int len; |
|
|
|
total_tests++; |
|
|
|
if (params->transfer_size) { |
|
if (params->transfer_size >= buf_size) { |
|
pr_err("%u-byte transfer size must be lower than %u-buffer size\n", |
|
params->transfer_size, buf_size); |
|
break; |
|
} |
|
len = params->transfer_size; |
|
} else if (params->norandom) { |
|
len = buf_size; |
|
} else { |
|
len = dmatest_random() % buf_size + 1; |
|
} |
|
|
|
/* 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) { |
|
src->off = 0; |
|
dst->off = 0; |
|
} else { |
|
src->off = dmatest_random() % (buf_size - len + 1); |
|
dst->off = dmatest_random() % (buf_size - len + 1); |
|
|
|
src->off = (src->off >> align) << align; |
|
dst->off = (dst->off >> align) << align; |
|
} |
|
|
|
if (!params->noverify) { |
|
start = ktime_get(); |
|
dmatest_init_srcs(src->aligned, src->off, len, |
|
buf_size, is_memset); |
|
dmatest_init_dsts(dst->aligned, dst->off, len, |
|
buf_size, is_memset); |
|
|
|
diff = ktime_sub(ktime_get(), start); |
|
filltime = ktime_add(filltime, diff); |
|
} |
|
|
|
um = dmaengine_get_unmap_data(dma_dev, src->cnt + dst->cnt, |
|
GFP_KERNEL); |
|
if (!um) { |
|
failed_tests++; |
|
result("unmap data NULL", total_tests, |
|
src->off, dst->off, len, ret); |
|
continue; |
|
} |
|
|
|
um->len = buf_size; |
|
for (i = 0; i < src->cnt; i++) { |
|
void *buf = src->aligned[i]; |
|
struct page *pg = virt_to_page(buf); |
|
unsigned long pg_off = offset_in_page(buf); |
|
|
|
um->addr[i] = dma_map_page(dma_dev, pg, pg_off, |
|
um->len, DMA_TO_DEVICE); |
|
srcs[i] = um->addr[i] + src->off; |
|
ret = dma_mapping_error(dma_dev, um->addr[i]); |
|
if (ret) { |
|
result("src mapping error", total_tests, |
|
src->off, dst->off, len, ret); |
|
goto error_unmap_continue; |
|
} |
|
um->to_cnt++; |
|
} |
|
/* map with DMA_BIDIRECTIONAL to force writeback/invalidate */ |
|
dsts = &um->addr[src->cnt]; |
|
for (i = 0; i < dst->cnt; i++) { |
|
void *buf = dst->aligned[i]; |
|
struct page *pg = virt_to_page(buf); |
|
unsigned long pg_off = offset_in_page(buf); |
|
|
|
dsts[i] = dma_map_page(dma_dev, pg, pg_off, um->len, |
|
DMA_BIDIRECTIONAL); |
|
ret = dma_mapping_error(dma_dev, dsts[i]); |
|
if (ret) { |
|
result("dst mapping error", total_tests, |
|
src->off, dst->off, len, ret); |
|
goto error_unmap_continue; |
|
} |
|
um->bidi_cnt++; |
|
} |
|
|
|
if (thread->type == DMA_MEMCPY) |
|
tx = dev->device_prep_dma_memcpy(chan, |
|
dsts[0] + dst->off, |
|
srcs[0], len, flags); |
|
else if (thread->type == DMA_MEMSET) |
|
tx = dev->device_prep_dma_memset(chan, |
|
dsts[0] + dst->off, |
|
*(src->aligned[0] + src->off), |
|
len, flags); |
|
else if (thread->type == DMA_XOR) |
|
tx = dev->device_prep_dma_xor(chan, |
|
dsts[0] + dst->off, |
|
srcs, src->cnt, |
|
len, flags); |
|
else if (thread->type == DMA_PQ) { |
|
for (i = 0; i < dst->cnt; i++) |
|
dma_pq[i] = dsts[i] + dst->off; |
|
tx = dev->device_prep_dma_pq(chan, dma_pq, srcs, |
|
src->cnt, pq_coefs, |
|
len, flags); |
|
} |
|
|
|
if (!tx) { |
|
result("prep error", total_tests, src->off, |
|
dst->off, len, ret); |
|
msleep(100); |
|
goto error_unmap_continue; |
|
} |
|
|
|
done->done = false; |
|
if (!params->polled) { |
|
tx->callback = dmatest_callback; |
|
tx->callback_param = done; |
|
} |
|
cookie = tx->tx_submit(tx); |
|
|
|
if (dma_submit_error(cookie)) { |
|
result("submit error", total_tests, src->off, |
|
dst->off, len, ret); |
|
msleep(100); |
|
goto error_unmap_continue; |
|
} |
|
|
|
if (params->polled) { |
|
status = dma_sync_wait(chan, cookie); |
|
dmaengine_terminate_sync(chan); |
|
if (status == DMA_COMPLETE) |
|
done->done = true; |
|
} else { |
|
dma_async_issue_pending(chan); |
|
|
|
wait_event_freezable_timeout(thread->done_wait, |
|
done->done, |
|
msecs_to_jiffies(params->timeout)); |
|
|
|
status = dma_async_is_tx_complete(chan, cookie, NULL, |
|
NULL); |
|
} |
|
|
|
if (!done->done) { |
|
result("test timed out", total_tests, src->off, dst->off, |
|
len, 0); |
|
goto error_unmap_continue; |
|
} else if (status != DMA_COMPLETE && |
|
!(dma_has_cap(DMA_COMPLETION_NO_ORDER, |
|
dev->cap_mask) && |
|
status == DMA_OUT_OF_ORDER)) { |
|
result(status == DMA_ERROR ? |
|
"completion error status" : |
|
"completion busy status", total_tests, src->off, |
|
dst->off, len, ret); |
|
goto error_unmap_continue; |
|
} |
|
|
|
dmaengine_unmap_put(um); |
|
|
|
if (params->noverify) { |
|
verbose_result("test passed", total_tests, src->off, |
|
dst->off, len, 0); |
|
continue; |
|
} |
|
|
|
start = ktime_get(); |
|
pr_debug("%s: verifying source buffer...\n", current->comm); |
|
error_count = dmatest_verify(src->aligned, 0, src->off, |
|
0, PATTERN_SRC, true, is_memset); |
|
error_count += dmatest_verify(src->aligned, src->off, |
|
src->off + len, src->off, |
|
PATTERN_SRC | PATTERN_COPY, true, is_memset); |
|
error_count += dmatest_verify(src->aligned, src->off + len, |
|
buf_size, src->off + len, |
|
PATTERN_SRC, true, is_memset); |
|
|
|
pr_debug("%s: verifying dest buffer...\n", current->comm); |
|
error_count += dmatest_verify(dst->aligned, 0, dst->off, |
|
0, PATTERN_DST, false, is_memset); |
|
|
|
error_count += dmatest_verify(dst->aligned, dst->off, |
|
dst->off + len, src->off, |
|
PATTERN_SRC | PATTERN_COPY, false, is_memset); |
|
|
|
error_count += dmatest_verify(dst->aligned, dst->off + len, |
|
buf_size, dst->off + len, |
|
PATTERN_DST, false, is_memset); |
|
|
|
diff = ktime_sub(ktime_get(), start); |
|
comparetime = ktime_add(comparetime, diff); |
|
|
|
if (error_count) { |
|
result("data error", total_tests, src->off, dst->off, |
|
len, error_count); |
|
failed_tests++; |
|
} else { |
|
verbose_result("test passed", total_tests, src->off, |
|
dst->off, len, 0); |
|
} |
|
|
|
continue; |
|
|
|
error_unmap_continue: |
|
dmaengine_unmap_put(um); |
|
failed_tests++; |
|
} |
|
ktime = ktime_sub(ktime_get(), ktime); |
|
ktime = ktime_sub(ktime, comparetime); |
|
ktime = ktime_sub(ktime, filltime); |
|
runtime = ktime_to_us(ktime); |
|
|
|
ret = 0; |
|
kfree(dma_pq); |
|
err_srcs_array: |
|
kfree(srcs); |
|
err_dst: |
|
dmatest_free_test_data(dst); |
|
err_src: |
|
dmatest_free_test_data(src); |
|
err_free_coefs: |
|
kfree(pq_coefs); |
|
err_thread_type: |
|
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, |
|
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_sync(chan); |
|
|
|
thread->done = true; |
|
wake_up(&thread_wait); |
|
|
|
return ret; |
|
} |
|
|
|
static void dmatest_cleanup_channel(struct dmatest_chan *dtc) |
|
{ |
|
struct dmatest_thread *thread; |
|
struct dmatest_thread *_thread; |
|
int ret; |
|
|
|
list_for_each_entry_safe(thread, _thread, &dtc->threads, node) { |
|
ret = kthread_stop(thread->task); |
|
pr_debug("thread %s exited with status %d\n", |
|
thread->task->comm, ret); |
|
list_del(&thread->node); |
|
put_task_struct(thread->task); |
|
kfree(thread); |
|
} |
|
|
|
/* terminate all transfers on specified channels */ |
|
dmaengine_terminate_sync(dtc->chan); |
|
|
|
kfree(dtc); |
|
} |
|
|
|
static int dmatest_add_threads(struct dmatest_info *info, |
|
struct dmatest_chan *dtc, enum dma_transaction_type type) |
|
{ |
|
struct dmatest_params *params = &info->params; |
|
struct dmatest_thread *thread; |
|
struct dma_chan *chan = dtc->chan; |
|
char *op; |
|
unsigned int i; |
|
|
|
if (type == DMA_MEMCPY) |
|
op = "copy"; |
|
else if (type == DMA_MEMSET) |
|
op = "set"; |
|
else if (type == DMA_XOR) |
|
op = "xor"; |
|
else if (type == DMA_PQ) |
|
op = "pq"; |
|
else |
|
return -EINVAL; |
|
|
|
for (i = 0; i < params->threads_per_chan; i++) { |
|
thread = kzalloc(sizeof(struct dmatest_thread), GFP_KERNEL); |
|
if (!thread) { |
|
pr_warn("No memory for %s-%s%u\n", |
|
dma_chan_name(chan), op, i); |
|
break; |
|
} |
|
thread->info = info; |
|
thread->chan = dtc->chan; |
|
thread->type = type; |
|
thread->test_done.wait = &thread->done_wait; |
|
init_waitqueue_head(&thread->done_wait); |
|
smp_wmb(); |
|
thread->task = kthread_create(dmatest_func, thread, "%s-%s%u", |
|
dma_chan_name(chan), op, i); |
|
if (IS_ERR(thread->task)) { |
|
pr_warn("Failed to create thread %s-%s%u\n", |
|
dma_chan_name(chan), op, i); |
|
kfree(thread); |
|
break; |
|
} |
|
|
|
/* srcbuf and dstbuf are allocated by the thread itself */ |
|
get_task_struct(thread->task); |
|
list_add_tail(&thread->node, &dtc->threads); |
|
thread->pending = true; |
|
} |
|
|
|
return i; |
|
} |
|
|
|
static int dmatest_add_channel(struct dmatest_info *info, |
|
struct dma_chan *chan) |
|
{ |
|
struct dmatest_chan *dtc; |
|
struct dma_device *dma_dev = chan->device; |
|
unsigned int thread_count = 0; |
|
int cnt; |
|
|
|
dtc = kmalloc(sizeof(struct dmatest_chan), GFP_KERNEL); |
|
if (!dtc) { |
|
pr_warn("No memory for %s\n", dma_chan_name(chan)); |
|
return -ENOMEM; |
|
} |
|
|
|
dtc->chan = chan; |
|
INIT_LIST_HEAD(&dtc->threads); |
|
|
|
if (dma_has_cap(DMA_COMPLETION_NO_ORDER, dma_dev->cap_mask) && |
|
info->params.polled) { |
|
info->params.polled = false; |
|
pr_warn("DMA_COMPLETION_NO_ORDER, polled disabled\n"); |
|
} |
|
|
|
if (dma_has_cap(DMA_MEMCPY, dma_dev->cap_mask)) { |
|
if (dmatest == 0) { |
|
cnt = dmatest_add_threads(info, dtc, DMA_MEMCPY); |
|
thread_count += cnt > 0 ? cnt : 0; |
|
} |
|
} |
|
|
|
if (dma_has_cap(DMA_MEMSET, dma_dev->cap_mask)) { |
|
if (dmatest == 1) { |
|
cnt = dmatest_add_threads(info, dtc, DMA_MEMSET); |
|
thread_count += cnt > 0 ? cnt : 0; |
|
} |
|
} |
|
|
|
if (dma_has_cap(DMA_XOR, dma_dev->cap_mask)) { |
|
cnt = dmatest_add_threads(info, dtc, DMA_XOR); |
|
thread_count += cnt > 0 ? cnt : 0; |
|
} |
|
if (dma_has_cap(DMA_PQ, dma_dev->cap_mask)) { |
|
cnt = dmatest_add_threads(info, dtc, DMA_PQ); |
|
thread_count += cnt > 0 ? cnt : 0; |
|
} |
|
|
|
pr_info("Added %u threads using %s\n", |
|
thread_count, dma_chan_name(chan)); |
|
|
|
list_add_tail(&dtc->node, &info->channels); |
|
info->nr_channels++; |
|
|
|
return 0; |
|
} |
|
|
|
static bool filter(struct dma_chan *chan, void *param) |
|
{ |
|
return dmatest_match_channel(param, chan) && dmatest_match_device(param, chan->device); |
|
} |
|
|
|
static void request_channels(struct dmatest_info *info, |
|
enum dma_transaction_type type) |
|
{ |
|
dma_cap_mask_t mask; |
|
|
|
dma_cap_zero(mask); |
|
dma_cap_set(type, mask); |
|
for (;;) { |
|
struct dmatest_params *params = &info->params; |
|
struct dma_chan *chan; |
|
|
|
chan = dma_request_channel(mask, filter, params); |
|
if (chan) { |
|
if (dmatest_add_channel(info, chan)) { |
|
dma_release_channel(chan); |
|
break; /* add_channel failed, punt */ |
|
} |
|
} else |
|
break; /* no more channels available */ |
|
if (params->max_channels && |
|
info->nr_channels >= params->max_channels) |
|
break; /* we have all we need */ |
|
} |
|
} |
|
|
|
static void add_threaded_test(struct dmatest_info *info) |
|
{ |
|
struct dmatest_params *params = &info->params; |
|
|
|
/* Copy test parameters */ |
|
params->buf_size = test_buf_size; |
|
strlcpy(params->channel, strim(test_channel), sizeof(params->channel)); |
|
strlcpy(params->device, strim(test_device), sizeof(params->device)); |
|
params->threads_per_chan = threads_per_chan; |
|
params->max_channels = max_channels; |
|
params->iterations = iterations; |
|
params->xor_sources = xor_sources; |
|
params->pq_sources = pq_sources; |
|
params->timeout = timeout; |
|
params->noverify = noverify; |
|
params->norandom = norandom; |
|
params->alignment = alignment; |
|
params->transfer_size = transfer_size; |
|
params->polled = polled; |
|
|
|
request_channels(info, DMA_MEMCPY); |
|
request_channels(info, DMA_MEMSET); |
|
request_channels(info, DMA_XOR); |
|
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; |
|
struct dma_chan *chan; |
|
|
|
list_for_each_entry_safe(dtc, _dtc, &info->channels, node) { |
|
list_del(&dtc->node); |
|
chan = dtc->chan; |
|
dmatest_cleanup_channel(dtc); |
|
pr_debug("dropped channel %s\n", dma_chan_name(chan)); |
|
dma_release_channel(chan); |
|
} |
|
|
|
info->nr_channels = 0; |
|
} |
|
|
|
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 |
|
*/ |
|
if (!info->did_init) |
|
return; |
|
|
|
run_pending_tests(info); |
|
} |
|
|
|
static int dmatest_run_get(char *val, const struct kernel_param *kp) |
|
{ |
|
struct dmatest_info *info = &test_info; |
|
|
|
mutex_lock(&info->lock); |
|
if (is_threaded_test_run(info)) { |
|
dmatest_run = true; |
|
} else { |
|
if (!is_threaded_test_pending(info)) |
|
stop_threaded_test(info); |
|
dmatest_run = false; |
|
} |
|
mutex_unlock(&info->lock); |
|
|
|
return param_get_bool(val, kp); |
|
} |
|
|
|
static int dmatest_run_set(const char *val, const struct kernel_param *kp) |
|
{ |
|
struct dmatest_info *info = &test_info; |
|
int ret; |
|
|
|
mutex_lock(&info->lock); |
|
ret = param_set_bool(val, kp); |
|
if (ret) { |
|
mutex_unlock(&info->lock); |
|
return ret; |
|
} else if (dmatest_run) { |
|
if (!is_threaded_test_pending(info)) { |
|
/* |
|
* We have nothing to run. This can be due to: |
|
*/ |
|
ret = info->last_error; |
|
if (ret) { |
|
/* 1) Misconfiguration */ |
|
pr_err("Channel misconfigured, can't continue\n"); |
|
mutex_unlock(&info->lock); |
|
return ret; |
|
} else { |
|
/* 2) We rely on defaults */ |
|
pr_info("No channels configured, continue with any\n"); |
|
if (!is_threaded_test_run(info)) |
|
stop_threaded_test(info); |
|
add_threaded_test(info); |
|
} |
|
} |
|
start_threaded_tests(info); |
|
} else { |
|
stop_threaded_test(info); |
|
} |
|
|
|
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; |
|
|
|
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 */ |
|
if (!list_empty(&info->channels)) { |
|
/* |
|
* 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. |
|
*/ |
|
dtc = list_last_entry(&info->channels, struct dmatest_chan, node); |
|
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; |
|
} |
|
|
|
info->last_error = ret; |
|
mutex_unlock(&info->lock); |
|
|
|
return ret; |
|
|
|
add_chan_err: |
|
param_set_copystring(chan_reset_val, kp); |
|
info->last_error = ret; |
|
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; |
|
struct dmatest_params *params = &info->params; |
|
|
|
if (dmatest_run) { |
|
mutex_lock(&info->lock); |
|
add_threaded_test(info); |
|
run_pending_tests(info); |
|
mutex_unlock(&info->lock); |
|
} |
|
|
|
if (params->iterations && wait) |
|
wait_event(thread_wait, !is_threaded_test_run(info)); |
|
|
|
/* module parameters are stable, inittime tests are started, |
|
* let userspace take over 'run' control |
|
*/ |
|
info->did_init = true; |
|
|
|
return 0; |
|
} |
|
/* when compiled-in wait for drivers to load first */ |
|
late_initcall(dmatest_init); |
|
|
|
static void __exit dmatest_exit(void) |
|
{ |
|
struct dmatest_info *info = &test_info; |
|
|
|
mutex_lock(&info->lock); |
|
stop_threaded_test(info); |
|
mutex_unlock(&info->lock); |
|
} |
|
module_exit(dmatest_exit); |
|
|
|
MODULE_AUTHOR("Haavard Skinnemoen (Atmel)"); |
|
MODULE_LICENSE("GPL v2");
|
|
|