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bf4afc53b7
This was done entirely with mindless brute force, using
git grep -l '\<k[vmz]*alloc_objs*(.*, GFP_KERNEL)' |
xargs sed -i 's/\(alloc_objs*(.*\), GFP_KERNEL)/\1)/'
to convert the new alloc_obj() users that had a simple GFP_KERNEL
argument to just drop that argument.
Note that due to the extreme simplicity of the scripting, any slightly
more complex cases spread over multiple lines would not be triggered:
they definitely exist, but this covers the vast bulk of the cases, and
the resulting diff is also then easier to check automatically.
For the same reason the 'flex' versions will be done as a separate
conversion.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
149 lines
3 KiB
C
149 lines
3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/device.h>
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#include <linux/dma-map-ops.h>
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#include <linux/dma-mapping.h>
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#include <linux/dmapool.h>
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#include <linux/kernel.h>
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#include <linux/ktime.h>
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#include <linux/module.h>
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#define NR_TESTS (100)
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struct dma_pool_pair {
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dma_addr_t dma;
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void *v;
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};
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struct dmapool_parms {
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size_t size;
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size_t align;
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size_t boundary;
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};
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static const struct dmapool_parms pool_parms[] = {
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{ .size = 16, .align = 16, .boundary = 0 },
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{ .size = 64, .align = 64, .boundary = 0 },
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{ .size = 256, .align = 256, .boundary = 0 },
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{ .size = 1024, .align = 1024, .boundary = 0 },
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{ .size = 4096, .align = 4096, .boundary = 0 },
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{ .size = 68, .align = 32, .boundary = 4096 },
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};
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static struct dma_pool *pool;
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static struct device test_dev;
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static u64 dma_mask;
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static inline int nr_blocks(int size)
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{
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return clamp_t(int, (PAGE_SIZE / size) * 512, 1024, 8192);
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}
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static int dmapool_test_alloc(struct dma_pool_pair *p, int blocks)
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{
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int i;
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for (i = 0; i < blocks; i++) {
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p[i].v = dma_pool_alloc(pool, GFP_KERNEL,
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&p[i].dma);
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if (!p[i].v)
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goto pool_fail;
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}
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for (i = 0; i < blocks; i++)
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dma_pool_free(pool, p[i].v, p[i].dma);
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return 0;
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pool_fail:
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for (--i; i >= 0; i--)
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dma_pool_free(pool, p[i].v, p[i].dma);
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return -ENOMEM;
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}
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static int dmapool_test_block(const struct dmapool_parms *parms)
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{
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int blocks = nr_blocks(parms->size);
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ktime_t start_time, end_time;
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struct dma_pool_pair *p;
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int i, ret;
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p = kzalloc_objs(*p, blocks);
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if (!p)
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return -ENOMEM;
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pool = dma_pool_create("test pool", &test_dev, parms->size,
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parms->align, parms->boundary);
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if (!pool) {
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ret = -ENOMEM;
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goto free_pairs;
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}
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start_time = ktime_get();
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for (i = 0; i < NR_TESTS; i++) {
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ret = dmapool_test_alloc(p, blocks);
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if (ret)
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goto free_pool;
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if (need_resched())
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cond_resched();
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}
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end_time = ktime_get();
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printk("dmapool test: size:%-4zu align:%-4zu blocks:%-4d time:%llu\n",
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parms->size, parms->align, blocks,
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ktime_us_delta(end_time, start_time));
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free_pool:
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dma_pool_destroy(pool);
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free_pairs:
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kfree(p);
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return ret;
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}
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static void dmapool_test_release(struct device *dev)
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{
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}
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static int dmapool_checks(void)
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{
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int i, ret;
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ret = dev_set_name(&test_dev, "dmapool-test");
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if (ret)
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return ret;
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ret = device_register(&test_dev);
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if (ret) {
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printk("%s: register failed:%d\n", __func__, ret);
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goto put_device;
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}
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test_dev.release = dmapool_test_release;
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set_dma_ops(&test_dev, NULL);
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test_dev.dma_mask = &dma_mask;
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ret = dma_set_mask_and_coherent(&test_dev, DMA_BIT_MASK(64));
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if (ret) {
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printk("%s: mask failed:%d\n", __func__, ret);
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goto del_device;
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}
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for (i = 0; i < ARRAY_SIZE(pool_parms); i++) {
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ret = dmapool_test_block(&pool_parms[i]);
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if (ret)
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break;
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}
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del_device:
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device_del(&test_dev);
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put_device:
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put_device(&test_dev);
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return ret;
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}
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static void dmapool_exit(void)
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{
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}
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module_init(dmapool_checks);
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module_exit(dmapool_exit);
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MODULE_DESCRIPTION("dma_pool timing test");
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MODULE_LICENSE("GPL");
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