Commit cf376b4b authored by Kishon Vijay Abraham I's avatar Kishon Vijay Abraham I Committed by Lorenzo Pieralisi
Browse files

misc: pci_endpoint_test: Add support to get DMA option from userspace 



'pcitest' utility now uses '-d' option to allow the user to test DMA.
Add support to parse option to use DMA from userspace application.

Signed-off-by: default avatarKishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: default avatarLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Tested-by: default avatarAlan Mikhak <alan.mikhak@sifive.com>
parent 73c57626

drivers/misc/pci_endpoint_test.c

+62 −3
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ 
#include <linux/mutex.h>

#include <linux/random.h>

#include <linux/slab.h>

#include <linux/uaccess.h>

#include <linux/pci.h>

#include <linux/pci_ids.h>
@@ -52,6 +53,7 @@ 
#define STATUS_SRC_ADDR_INVALID			BIT(7)

#define STATUS_DST_ADDR_INVALID			BIT(8)



#define PCI_ENDPOINT_TEST_STATUS		0x8

#define PCI_ENDPOINT_TEST_LOWER_SRC_ADDR	0x0c

#define PCI_ENDPOINT_TEST_UPPER_SRC_ADDR	0x10
@@ -64,6 +66,9 @@ 
#define PCI_ENDPOINT_TEST_IRQ_TYPE		0x24

#define PCI_ENDPOINT_TEST_IRQ_NUMBER		0x28



#define PCI_ENDPOINT_TEST_FLAGS			0x2c

#define FLAG_USE_DMA				BIT(0)



#define PCI_DEVICE_ID_TI_AM654			0xb00c



#define is_am654_pci_dev(pdev)		\
@@ -315,11 +320,16 @@ static bool pci_endpoint_test_msi_irq(struct pci_endpoint_test *test, 
	return false;

}



static bool pci_endpoint_test_copy(struct pci_endpoint_test *test, size_t size)

static bool pci_endpoint_test_copy(struct pci_endpoint_test *test,

				   unsigned long arg)

{

	struct pci_endpoint_test_xfer_param param;

	bool ret = false;

	void *src_addr;

	void *dst_addr;

	u32 flags = 0;

	bool use_dma;

	size_t size;

	dma_addr_t src_phys_addr;

	dma_addr_t dst_phys_addr;

	struct pci_dev *pdev = test->pdev;
@@ -332,10 +342,22 @@ static bool pci_endpoint_test_copy(struct pci_endpoint_test *test, size_t size) 
	size_t alignment = test->alignment;

	u32 src_crc32;

	u32 dst_crc32;

	int err;



	err = copy_from_user(&param, (void __user *)arg, sizeof(param));

	if (err) {

		dev_err(dev, "Failed to get transfer param\n");

		return false;

	}



	size = param.size;

	if (size > SIZE_MAX - alignment)

		goto err;



	use_dma = !!(param.flags & PCITEST_FLAGS_USE_DMA);

	if (use_dma)

		flags |= FLAG_USE_DMA;



	if (irq_type < IRQ_TYPE_LEGACY || irq_type > IRQ_TYPE_MSIX) {

		dev_err(dev, "Invalid IRQ type option\n");

		goto err;
@@ -406,6 +428,7 @@ static bool pci_endpoint_test_copy(struct pci_endpoint_test *test, size_t size) 
	pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_SIZE,

				 size);



	pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_FLAGS, flags);

	pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_IRQ_TYPE, irq_type);

	pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_IRQ_NUMBER, 1);

	pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_COMMAND,
@@ -434,9 +457,13 @@ err: 
	return ret;

}



static bool pci_endpoint_test_write(struct pci_endpoint_test *test, size_t size)

static bool pci_endpoint_test_write(struct pci_endpoint_test *test,

				    unsigned long arg)

{

	struct pci_endpoint_test_xfer_param param;

	bool ret = false;

	u32 flags = 0;

	bool use_dma;

	u32 reg;

	void *addr;

	dma_addr_t phys_addr;
@@ -446,11 +473,24 @@ static bool pci_endpoint_test_write(struct pci_endpoint_test *test, size_t size) 
	dma_addr_t orig_phys_addr;

	size_t offset;

	size_t alignment = test->alignment;

	size_t size;

	u32 crc32;

	int err;



	err = copy_from_user(&param, (void __user *)arg, sizeof(param));

	if (err != 0) {

		dev_err(dev, "Failed to get transfer param\n");

		return false;

	}



	size = param.size;

	if (size > SIZE_MAX - alignment)

		goto err;



	use_dma = !!(param.flags & PCITEST_FLAGS_USE_DMA);

	if (use_dma)

		flags |= FLAG_USE_DMA;



	if (irq_type < IRQ_TYPE_LEGACY || irq_type > IRQ_TYPE_MSIX) {

		dev_err(dev, "Invalid IRQ type option\n");

		goto err;
@@ -493,6 +533,7 @@ static bool pci_endpoint_test_write(struct pci_endpoint_test *test, size_t size) 


	pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_SIZE, size);



	pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_FLAGS, flags);

	pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_IRQ_TYPE, irq_type);

	pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_IRQ_NUMBER, 1);

	pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_COMMAND,
@@ -514,9 +555,14 @@ err: 
	return ret;

}



static bool pci_endpoint_test_read(struct pci_endpoint_test *test, size_t size)

static bool pci_endpoint_test_read(struct pci_endpoint_test *test,

				   unsigned long arg)

{

	struct pci_endpoint_test_xfer_param param;

	bool ret = false;

	u32 flags = 0;

	bool use_dma;

	size_t size;

	void *addr;

	dma_addr_t phys_addr;

	struct pci_dev *pdev = test->pdev;
@@ -526,10 +572,22 @@ static bool pci_endpoint_test_read(struct pci_endpoint_test *test, size_t size) 
	size_t offset;

	size_t alignment = test->alignment;

	u32 crc32;

	int err;



	err = copy_from_user(&param, (void __user *)arg, sizeof(param));

	if (err) {

		dev_err(dev, "Failed to get transfer param\n");

		return false;

	}



	size = param.size;

	if (size > SIZE_MAX - alignment)

		goto err;



	use_dma = !!(param.flags & PCITEST_FLAGS_USE_DMA);

	if (use_dma)

		flags |= FLAG_USE_DMA;



	if (irq_type < IRQ_TYPE_LEGACY || irq_type > IRQ_TYPE_MSIX) {

		dev_err(dev, "Invalid IRQ type option\n");

		goto err;
@@ -566,6 +624,7 @@ static bool pci_endpoint_test_read(struct pci_endpoint_test *test, size_t size) 


	pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_SIZE, size);



	pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_FLAGS, flags);

	pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_IRQ_TYPE, irq_type);

	pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_IRQ_NUMBER, 1);

	pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_COMMAND,

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