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misc: pci_endpoint_test: Use streaming DMA APIs for buffer allocation

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Use streaming DMA APIs (dma_map_single/dma_unmap_single) for buffers
transmitted/received by the endpoint device instead of allocating
a coherent memory. Also add default_data to set the alignment to
4KB since dma_map_single might not return a 4KB aligned address.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Tested-by: Alan Mikhak <alan.mikhak@sifive.com>
This commit is contained in:
Kishon Vijay Abraham I 2020-03-16 16:54:22 +05:30 committed by Lorenzo Pieralisi
parent 5893c2e535
commit 0a121f9bc3
1 changed files with 79 additions and 21 deletions
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100
drivers/misc/pci_endpoint_test.c
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@ -341,14 +341,22 @@ static bool pci_endpoint_test_copy(struct pci_endpoint_test *test, size_t size)
goto err;
}
orig_src_addr = dma_alloc_coherent(dev, size + alignment,
&orig_src_phys_addr, GFP_KERNEL);
orig_src_addr = kzalloc(size + alignment, GFP_KERNEL);
if (!orig_src_addr) {
dev_err(dev, "Failed to allocate source buffer\n");
ret = false;
goto err;
}
get_random_bytes(orig_src_addr, size + alignment);
orig_src_phys_addr = dma_map_single(dev, orig_src_addr,
size + alignment, DMA_TO_DEVICE);
if (dma_mapping_error(dev, orig_src_phys_addr)) {
dev_err(dev, "failed to map source buffer address\n");
ret = false;
goto err_src_phys_addr;
}
if (alignment && !IS_ALIGNED(orig_src_phys_addr, alignment)) {
src_phys_addr = PTR_ALIGN(orig_src_phys_addr, alignment);
offset = src_phys_addr - orig_src_phys_addr;
@ -364,15 +372,21 @@ static bool pci_endpoint_test_copy(struct pci_endpoint_test *test, size_t size)
pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_UPPER_SRC_ADDR,
upper_32_bits(src_phys_addr));
get_random_bytes(src_addr, size);
src_crc32 = crc32_le(~0, src_addr, size);
orig_dst_addr = dma_alloc_coherent(dev, size + alignment,
&orig_dst_phys_addr, GFP_KERNEL);
orig_dst_addr = kzalloc(size + alignment, GFP_KERNEL);
if (!orig_dst_addr) {
dev_err(dev, "Failed to allocate destination address\n");
ret = false;
goto err_orig_src_addr;
goto err_dst_addr;
}
orig_dst_phys_addr = dma_map_single(dev, orig_dst_addr,
size + alignment, DMA_FROM_DEVICE);
if (dma_mapping_error(dev, orig_dst_phys_addr)) {
dev_err(dev, "failed to map destination buffer address\n");
ret = false;
goto err_dst_phys_addr;
}
if (alignment && !IS_ALIGNED(orig_dst_phys_addr, alignment)) {
@ -399,16 +413,22 @@ static bool pci_endpoint_test_copy(struct pci_endpoint_test *test, size_t size)
wait_for_completion(&test->irq_raised);
dma_unmap_single(dev, orig_dst_phys_addr, size + alignment,
DMA_FROM_DEVICE);
dst_crc32 = crc32_le(~0, dst_addr, size);
if (dst_crc32 == src_crc32)
ret = true;
dma_free_coherent(dev, size + alignment, orig_dst_addr,
orig_dst_phys_addr);
err_dst_phys_addr:
kfree(orig_dst_addr);
err_orig_src_addr:
dma_free_coherent(dev, size + alignment, orig_src_addr,
orig_src_phys_addr);
err_dst_addr:
dma_unmap_single(dev, orig_src_phys_addr, size + alignment,
DMA_TO_DEVICE);
err_src_phys_addr:
kfree(orig_src_addr);
err:
return ret;
@ -436,14 +456,23 @@ static bool pci_endpoint_test_write(struct pci_endpoint_test *test, size_t size)
goto err;
}
orig_addr = dma_alloc_coherent(dev, size + alignment, &orig_phys_addr,
GFP_KERNEL);
orig_addr = kzalloc(size + alignment, GFP_KERNEL);
if (!orig_addr) {
dev_err(dev, "Failed to allocate address\n");
ret = false;
goto err;
}
get_random_bytes(orig_addr, size + alignment);
orig_phys_addr = dma_map_single(dev, orig_addr, size + alignment,
DMA_TO_DEVICE);
if (dma_mapping_error(dev, orig_phys_addr)) {
dev_err(dev, "failed to map source buffer address\n");
ret = false;
goto err_phys_addr;
}
if (alignment && !IS_ALIGNED(orig_phys_addr, alignment)) {
phys_addr = PTR_ALIGN(orig_phys_addr, alignment);
offset = phys_addr - orig_phys_addr;
@ -453,8 +482,6 @@ static bool pci_endpoint_test_write(struct pci_endpoint_test *test, size_t size)
addr = orig_addr;
}
get_random_bytes(addr, size);
crc32 = crc32_le(~0, addr, size);
pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_CHECKSUM,
crc32);
@ -477,7 +504,11 @@ static bool pci_endpoint_test_write(struct pci_endpoint_test *test, size_t size)
if (reg & STATUS_READ_SUCCESS)
ret = true;
dma_free_coherent(dev, size + alignment, orig_addr, orig_phys_addr);
dma_unmap_single(dev, orig_phys_addr, size + alignment,
DMA_TO_DEVICE);
err_phys_addr:
kfree(orig_addr);
err:
return ret;
@ -504,14 +535,21 @@ static bool pci_endpoint_test_read(struct pci_endpoint_test *test, size_t size)
goto err;
}
orig_addr = dma_alloc_coherent(dev, size + alignment, &orig_phys_addr,
GFP_KERNEL);
orig_addr = kzalloc(size + alignment, GFP_KERNEL);
if (!orig_addr) {
dev_err(dev, "Failed to allocate destination address\n");
ret = false;
goto err;
}
orig_phys_addr = dma_map_single(dev, orig_addr, size + alignment,
DMA_FROM_DEVICE);
if (dma_mapping_error(dev, orig_phys_addr)) {
dev_err(dev, "failed to map source buffer address\n");
ret = false;
goto err_phys_addr;
}
if (alignment && !IS_ALIGNED(orig_phys_addr, alignment)) {
phys_addr = PTR_ALIGN(orig_phys_addr, alignment);
offset = phys_addr - orig_phys_addr;
@ -535,11 +573,15 @@ static bool pci_endpoint_test_read(struct pci_endpoint_test *test, size_t size)
wait_for_completion(&test->irq_raised);
dma_unmap_single(dev, orig_phys_addr, size + alignment,
DMA_FROM_DEVICE);
crc32 = crc32_le(~0, addr, size);
if (crc32 == pci_endpoint_test_readl(test, PCI_ENDPOINT_TEST_CHECKSUM))
ret = true;
dma_free_coherent(dev, size + alignment, orig_addr, orig_phys_addr);
err_phys_addr:
kfree(orig_addr);
err:
return ret;
}
@ -667,6 +709,12 @@ static int pci_endpoint_test_probe(struct pci_dev *pdev,
init_completion(&test->irq_raised);
mutex_init(&test->mutex);
if ((dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(48)) != 0) &&
dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)) != 0) {
dev_err(dev, "Cannot set DMA mask\n");
return -EINVAL;
}
err = pci_enable_device(pdev);
if (err) {
dev_err(dev, "Cannot enable PCI device\n");
@ -783,6 +831,12 @@ static void pci_endpoint_test_remove(struct pci_dev *pdev)
pci_disable_device(pdev);
}
static const struct pci_endpoint_test_data default_data = {
.test_reg_bar = BAR_0,
.alignment = SZ_4K,
.irq_type = IRQ_TYPE_MSI,
};
static const struct pci_endpoint_test_data am654_data = {
.test_reg_bar = BAR_2,
.alignment = SZ_64K,
@ -790,8 +844,12 @@ static const struct pci_endpoint_test_data am654_data = {
};
static const struct pci_device_id pci_endpoint_test_tbl[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_DRA74x) },
{ PCI_DEVICE(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_DRA72x) },
{ PCI_DEVICE(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_DRA74x),
.driver_data = (kernel_ulong_t)&default_data,
},
{ PCI_DEVICE(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_DRA72x),
.driver_data = (kernel_ulong_t)&default_data,
},
{ PCI_DEVICE(PCI_VENDOR_ID_FREESCALE, 0x81c0) },
{ PCI_DEVICE_DATA(SYNOPSYS, EDDA, NULL) },
{ PCI_DEVICE(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_AM654),