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

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'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: Kishon Vijay Abraham I <kishon@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 16:54:24 +05:30 committed by Lorenzo Pieralisi
parent 73c5762652
commit cf376b4b59
1 changed files with 62 additions and 3 deletions
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65
drivers/misc/pci_endpoint_test.c
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@ -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 @@ static bool pci_endpoint_test_copy(struct pci_endpoint_test *test, size_t size)
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 @@ static bool pci_endpoint_test_write(struct pci_endpoint_test *test, size_t size)
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,