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path: root/drivers/misc/pci_endpoint_test.c
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Diffstat (limited to 'drivers/misc/pci_endpoint_test.c')
-rw-r--r--drivers/misc/pci_endpoint_test.c213
1 files changed, 179 insertions, 34 deletions
diff --git a/drivers/misc/pci_endpoint_test.c b/drivers/misc/pci_endpoint_test.c
index a5e317073d95..ef5a1af6bab7 100644
--- a/drivers/misc/pci_endpoint_test.c
+++ b/drivers/misc/pci_endpoint_test.c
@@ -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>
@@ -64,6 +65,9 @@
#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) \
@@ -98,11 +102,13 @@ struct pci_endpoint_test {
struct completion irq_raised;
int last_irq;
int num_irqs;
+ int irq_type;
/* mutex to protect the ioctls */
struct mutex mutex;
struct miscdevice miscdev;
enum pci_barno test_reg_bar;
size_t alignment;
+ const char *name;
};
struct pci_endpoint_test_data {
@@ -157,6 +163,7 @@ static void pci_endpoint_test_free_irq_vectors(struct pci_endpoint_test *test)
struct pci_dev *pdev = test->pdev;
pci_free_irq_vectors(pdev);
+ test->irq_type = IRQ_TYPE_UNDEFINED;
}
static bool pci_endpoint_test_alloc_irq_vectors(struct pci_endpoint_test *test,
@@ -191,6 +198,8 @@ static bool pci_endpoint_test_alloc_irq_vectors(struct pci_endpoint_test *test,
irq = 0;
res = false;
}
+
+ test->irq_type = type;
test->num_irqs = irq;
return res;
@@ -218,7 +227,7 @@ static bool pci_endpoint_test_request_irq(struct pci_endpoint_test *test)
for (i = 0; i < test->num_irqs; i++) {
err = devm_request_irq(dev, pci_irq_vector(pdev, i),
pci_endpoint_test_irqhandler,
- IRQF_SHARED, DRV_MODULE_NAME, test);
+ IRQF_SHARED, test->name, test);
if (err)
goto fail;
}
@@ -315,11 +324,16 @@ 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;
@@ -330,25 +344,46 @@ static bool pci_endpoint_test_copy(struct pci_endpoint_test *test, size_t size)
dma_addr_t orig_dst_phys_addr;
size_t offset;
size_t alignment = test->alignment;
+ int irq_type = test->irq_type;
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;
}
- 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 +399,21 @@ 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)) {
@@ -392,6 +433,7 @@ 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,
@@ -399,24 +441,34 @@ 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;
}
-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;
@@ -426,24 +478,47 @@ 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;
+ int irq_type = test->irq_type;
+ 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;
}
- 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 +528,6 @@ 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);
@@ -466,6 +539,7 @@ 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,
@@ -477,15 +551,24 @@ 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;
}
-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;
@@ -494,24 +577,44 @@ static bool pci_endpoint_test_read(struct pci_endpoint_test *test, size_t size)
dma_addr_t orig_phys_addr;
size_t offset;
size_t alignment = test->alignment;
+ int irq_type = test->irq_type;
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;
}
- 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;
@@ -528,6 +631,7 @@ 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,
@@ -535,15 +639,26 @@ 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;
}
+static bool pci_endpoint_test_clear_irq(struct pci_endpoint_test *test)
+{
+ pci_endpoint_test_release_irq(test);
+ pci_endpoint_test_free_irq_vectors(test);
+ return true;
+}
+
static bool pci_endpoint_test_set_irq(struct pci_endpoint_test *test,
int req_irq_type)
{
@@ -555,7 +670,7 @@ static bool pci_endpoint_test_set_irq(struct pci_endpoint_test *test,
return false;
}
- if (irq_type == req_irq_type)
+ if (test->irq_type == req_irq_type)
return true;
pci_endpoint_test_release_irq(test);
@@ -567,12 +682,10 @@ static bool pci_endpoint_test_set_irq(struct pci_endpoint_test *test,
if (!pci_endpoint_test_request_irq(test))
goto err;
- irq_type = req_irq_type;
return true;
err:
pci_endpoint_test_free_irq_vectors(test);
- irq_type = IRQ_TYPE_UNDEFINED;
return false;
}
@@ -616,6 +729,9 @@ static long pci_endpoint_test_ioctl(struct file *file, unsigned int cmd,
case PCITEST_GET_IRQTYPE:
ret = irq_type;
break;
+ case PCITEST_CLEAR_IRQ:
+ ret = pci_endpoint_test_clear_irq(test);
+ break;
}
ret:
@@ -633,7 +749,7 @@ static int pci_endpoint_test_probe(struct pci_dev *pdev,
{
int err;
int id;
- char name[20];
+ char name[24];
enum pci_barno bar;
void __iomem *base;
struct device *dev = &pdev->dev;
@@ -652,6 +768,7 @@ static int pci_endpoint_test_probe(struct pci_dev *pdev,
test->test_reg_bar = 0;
test->alignment = 0;
test->pdev = pdev;
+ test->irq_type = IRQ_TYPE_UNDEFINED;
if (no_msi)
irq_type = IRQ_TYPE_LEGACY;
@@ -667,6 +784,12 @@ 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");
@@ -684,9 +807,6 @@ static int pci_endpoint_test_probe(struct pci_dev *pdev,
if (!pci_endpoint_test_alloc_irq_vectors(test, irq_type))
goto err_disable_irq;
- if (!pci_endpoint_test_request_irq(test))
- goto err_disable_irq;
-
for (bar = 0; bar < PCI_STD_NUM_BARS; bar++) {
if (pci_resource_flags(pdev, bar) & IORESOURCE_MEM) {
base = pci_ioremap_bar(pdev, bar);
@@ -716,12 +836,21 @@ static int pci_endpoint_test_probe(struct pci_dev *pdev,
}
snprintf(name, sizeof(name), DRV_MODULE_NAME ".%d", id);
+ test->name = kstrdup(name, GFP_KERNEL);
+ if (!test->name) {
+ err = -ENOMEM;
+ goto err_ida_remove;
+ }
+
+ if (!pci_endpoint_test_request_irq(test))
+ goto err_kfree_test_name;
+
misc_device = &test->miscdev;
misc_device->minor = MISC_DYNAMIC_MINOR;
misc_device->name = kstrdup(name, GFP_KERNEL);
if (!misc_device->name) {
err = -ENOMEM;
- goto err_ida_remove;
+ goto err_release_irq;
}
misc_device->fops = &pci_endpoint_test_fops,
@@ -736,6 +865,12 @@ static int pci_endpoint_test_probe(struct pci_dev *pdev,
err_kfree_name:
kfree(misc_device->name);
+err_release_irq:
+ pci_endpoint_test_release_irq(test);
+
+err_kfree_test_name:
+ kfree(test->name);
+
err_ida_remove:
ida_simple_remove(&pci_endpoint_test_ida, id);
@@ -744,7 +879,6 @@ err_iounmap:
if (test->bar[bar])
pci_iounmap(pdev, test->bar[bar]);
}
- pci_endpoint_test_release_irq(test);
err_disable_irq:
pci_endpoint_test_free_irq_vectors(test);
@@ -770,6 +904,7 @@ static void pci_endpoint_test_remove(struct pci_dev *pdev)
misc_deregister(&test->miscdev);
kfree(misc_device->name);
+ kfree(test->name);
ida_simple_remove(&pci_endpoint_test_ida, id);
for (bar = 0; bar < PCI_STD_NUM_BARS; bar++) {
if (test->bar[bar])
@@ -783,6 +918,12 @@ 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 +931,12 @@ 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),
generated by cgit (git 2.34.1) at 2024-05-06 12:54:24 +0000