diff options
Diffstat (limited to 'drivers/misc/pci_endpoint_test.c')
| -rw-r--r-- | drivers/misc/pci_endpoint_test.c | 290 |
1 files changed, 222 insertions, 68 deletions
diff --git a/drivers/misc/pci_endpoint_test.c b/drivers/misc/pci_endpoint_test.c index 7b370466a227..896e2df9400f 100644 --- a/drivers/misc/pci_endpoint_test.c +++ b/drivers/misc/pci_endpoint_test.c @@ -35,38 +35,45 @@ #include <uapi/linux/pcitest.h> -#define DRV_MODULE_NAME "pci-endpoint-test" - -#define PCI_ENDPOINT_TEST_MAGIC 0x0 - -#define PCI_ENDPOINT_TEST_COMMAND 0x4 -#define COMMAND_RAISE_LEGACY_IRQ BIT(0) -#define COMMAND_RAISE_MSI_IRQ BIT(1) -#define MSI_NUMBER_SHIFT 2 -/* 6 bits for MSI number */ -#define COMMAND_READ BIT(8) -#define COMMAND_WRITE BIT(9) -#define COMMAND_COPY BIT(10) - -#define PCI_ENDPOINT_TEST_STATUS 0x8 -#define STATUS_READ_SUCCESS BIT(0) -#define STATUS_READ_FAIL BIT(1) -#define STATUS_WRITE_SUCCESS BIT(2) -#define STATUS_WRITE_FAIL BIT(3) -#define STATUS_COPY_SUCCESS BIT(4) -#define STATUS_COPY_FAIL BIT(5) -#define STATUS_IRQ_RAISED BIT(6) -#define STATUS_SRC_ADDR_INVALID BIT(7) -#define STATUS_DST_ADDR_INVALID BIT(8) - -#define PCI_ENDPOINT_TEST_LOWER_SRC_ADDR 0xc +#define DRV_MODULE_NAME "pci-endpoint-test" + +#define IRQ_TYPE_UNDEFINED -1 +#define IRQ_TYPE_LEGACY 0 +#define IRQ_TYPE_MSI 1 +#define IRQ_TYPE_MSIX 2 + +#define PCI_ENDPOINT_TEST_MAGIC 0x0 + +#define PCI_ENDPOINT_TEST_COMMAND 0x4 +#define COMMAND_RAISE_LEGACY_IRQ BIT(0) +#define COMMAND_RAISE_MSI_IRQ BIT(1) +#define COMMAND_RAISE_MSIX_IRQ BIT(2) +#define COMMAND_READ BIT(3) +#define COMMAND_WRITE BIT(4) +#define COMMAND_COPY BIT(5) + +#define PCI_ENDPOINT_TEST_STATUS 0x8 +#define STATUS_READ_SUCCESS BIT(0) +#define STATUS_READ_FAIL BIT(1) +#define STATUS_WRITE_SUCCESS BIT(2) +#define STATUS_WRITE_FAIL BIT(3) +#define STATUS_COPY_SUCCESS BIT(4) +#define STATUS_COPY_FAIL BIT(5) +#define STATUS_IRQ_RAISED BIT(6) +#define STATUS_SRC_ADDR_INVALID BIT(7) +#define STATUS_DST_ADDR_INVALID BIT(8) + +#define PCI_ENDPOINT_TEST_LOWER_SRC_ADDR 0x0c #define PCI_ENDPOINT_TEST_UPPER_SRC_ADDR 0x10 #define PCI_ENDPOINT_TEST_LOWER_DST_ADDR 0x14 #define PCI_ENDPOINT_TEST_UPPER_DST_ADDR 0x18 -#define PCI_ENDPOINT_TEST_SIZE 0x1c -#define PCI_ENDPOINT_TEST_CHECKSUM 0x20 +#define PCI_ENDPOINT_TEST_SIZE 0x1c +#define PCI_ENDPOINT_TEST_CHECKSUM 0x20 + +#define PCI_ENDPOINT_TEST_IRQ_TYPE 0x24 +#define PCI_ENDPOINT_TEST_IRQ_NUMBER 0x28 static DEFINE_IDA(pci_endpoint_test_ida); @@ -77,6 +84,10 @@ static bool no_msi; module_param(no_msi, bool, 0444); MODULE_PARM_DESC(no_msi, "Disable MSI interrupt in pci_endpoint_test"); +static int irq_type = IRQ_TYPE_MSI; +module_param(irq_type, int, 0444); +MODULE_PARM_DESC(irq_type, "IRQ mode selection in pci_endpoint_test (0 - Legacy, 1 - MSI, 2 - MSI-X)"); + enum pci_barno { BAR_0, BAR_1, @@ -103,7 +114,7 @@ struct pci_endpoint_test { struct pci_endpoint_test_data { enum pci_barno test_reg_bar; size_t alignment; - bool no_msi; + int irq_type; }; static inline u32 pci_endpoint_test_readl(struct pci_endpoint_test *test, @@ -147,6 +158,100 @@ static irqreturn_t pci_endpoint_test_irqhandler(int irq, void *dev_id) return IRQ_HANDLED; } +static void pci_endpoint_test_free_irq_vectors(struct pci_endpoint_test *test) +{ + struct pci_dev *pdev = test->pdev; + + pci_free_irq_vectors(pdev); +} + +static bool pci_endpoint_test_alloc_irq_vectors(struct pci_endpoint_test *test, + int type) +{ + int irq = -1; + struct pci_dev *pdev = test->pdev; + struct device *dev = &pdev->dev; + bool res = true; + + switch (type) { + case IRQ_TYPE_LEGACY: + irq = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_LEGACY); + if (irq < 0) + dev_err(dev, "Failed to get Legacy interrupt\n"); + break; + case IRQ_TYPE_MSI: + irq = pci_alloc_irq_vectors(pdev, 1, 32, PCI_IRQ_MSI); + if (irq < 0) + dev_err(dev, "Failed to get MSI interrupts\n"); + break; + case IRQ_TYPE_MSIX: + irq = pci_alloc_irq_vectors(pdev, 1, 2048, PCI_IRQ_MSIX); + if (irq < 0) + dev_err(dev, "Failed to get MSI-X interrupts\n"); + break; + default: + dev_err(dev, "Invalid IRQ type selected\n"); + } + + if (irq < 0) { + irq = 0; + res = false; + } + test->num_irqs = irq; + + return res; +} + +static void pci_endpoint_test_release_irq(struct pci_endpoint_test *test) +{ + int i; + struct pci_dev *pdev = test->pdev; + struct device *dev = &pdev->dev; + + for (i = 0; i < test->num_irqs; i++) + devm_free_irq(dev, pci_irq_vector(pdev, i), test); + + test->num_irqs = 0; +} + +static bool pci_endpoint_test_request_irq(struct pci_endpoint_test *test) +{ + int i; + int err; + struct pci_dev *pdev = test->pdev; + struct device *dev = &pdev->dev; + + 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); + if (err) + goto fail; + } + + return true; + +fail: + switch (irq_type) { + case IRQ_TYPE_LEGACY: + dev_err(dev, "Failed to request IRQ %d for Legacy\n", + pci_irq_vector(pdev, i)); + break; + case IRQ_TYPE_MSI: + dev_err(dev, "Failed to request IRQ %d for MSI %d\n", + pci_irq_vector(pdev, i), + i + 1); + break; + case IRQ_TYPE_MSIX: + dev_err(dev, "Failed to request IRQ %d for MSI-X %d\n", + pci_irq_vector(pdev, i), + i + 1); + break; + } + + return false; +} + static bool pci_endpoint_test_bar(struct pci_endpoint_test *test, enum pci_barno barno) { @@ -179,6 +284,9 @@ static bool pci_endpoint_test_legacy_irq(struct pci_endpoint_test *test) { u32 val; + pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_IRQ_TYPE, + IRQ_TYPE_LEGACY); + pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_IRQ_NUMBER, 0); pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_COMMAND, COMMAND_RAISE_LEGACY_IRQ); val = wait_for_completion_timeout(&test->irq_raised, @@ -190,14 +298,18 @@ static bool pci_endpoint_test_legacy_irq(struct pci_endpoint_test *test) } static bool pci_endpoint_test_msi_irq(struct pci_endpoint_test *test, - u8 msi_num) + u16 msi_num, bool msix) { u32 val; struct pci_dev *pdev = test->pdev; + pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_IRQ_TYPE, + msix == false ? IRQ_TYPE_MSI : + IRQ_TYPE_MSIX); + pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_IRQ_NUMBER, msi_num); pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_COMMAND, - msi_num << MSI_NUMBER_SHIFT | - COMMAND_RAISE_MSI_IRQ); + msix == false ? COMMAND_RAISE_MSI_IRQ : + COMMAND_RAISE_MSIX_IRQ); val = wait_for_completion_timeout(&test->irq_raised, msecs_to_jiffies(1000)); if (!val) @@ -230,6 +342,11 @@ static bool pci_endpoint_test_copy(struct pci_endpoint_test *test, size_t size) if (size > SIZE_MAX - alignment) goto err; + 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); if (!orig_src_addr) { @@ -281,8 +398,10 @@ 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_IRQ_TYPE, irq_type); + pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_IRQ_NUMBER, 1); pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_COMMAND, - 1 << MSI_NUMBER_SHIFT | COMMAND_COPY); + COMMAND_COPY); wait_for_completion(&test->irq_raised); @@ -318,6 +437,11 @@ static bool pci_endpoint_test_write(struct pci_endpoint_test *test, size_t size) if (size > SIZE_MAX - alignment) goto err; + 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); if (!orig_addr) { @@ -348,8 +472,10 @@ 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_IRQ_TYPE, irq_type); + pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_IRQ_NUMBER, 1); pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_COMMAND, - 1 << MSI_NUMBER_SHIFT | COMMAND_READ); + COMMAND_READ); wait_for_completion(&test->irq_raised); @@ -379,6 +505,11 @@ static bool pci_endpoint_test_read(struct pci_endpoint_test *test, size_t size) if (size > SIZE_MAX - alignment) goto err; + 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); if (!orig_addr) { @@ -403,8 +534,10 @@ 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_IRQ_TYPE, irq_type); + pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_IRQ_NUMBER, 1); pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_COMMAND, - 1 << MSI_NUMBER_SHIFT | COMMAND_WRITE); + COMMAND_WRITE); wait_for_completion(&test->irq_raised); @@ -417,6 +550,38 @@ err: return ret; } +static bool pci_endpoint_test_set_irq(struct pci_endpoint_test *test, + int req_irq_type) +{ + struct pci_dev *pdev = test->pdev; + struct device *dev = &pdev->dev; + + if (req_irq_type < IRQ_TYPE_LEGACY || req_irq_type > IRQ_TYPE_MSIX) { + dev_err(dev, "Invalid IRQ type option\n"); + return false; + } + + if (irq_type == req_irq_type) + return true; + + pci_endpoint_test_release_irq(test); + pci_endpoint_test_free_irq_vectors(test); + + if (!pci_endpoint_test_alloc_irq_vectors(test, req_irq_type)) + goto err; + + 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; +} + static long pci_endpoint_test_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { @@ -436,7 +601,8 @@ static long pci_endpoint_test_ioctl(struct file *file, unsigned int cmd, ret = pci_endpoint_test_legacy_irq(test); break; case PCITEST_MSI: - ret = pci_endpoint_test_msi_irq(test, arg); + case PCITEST_MSIX: + ret = pci_endpoint_test_msi_irq(test, arg, cmd == PCITEST_MSIX); break; case PCITEST_WRITE: ret = pci_endpoint_test_write(test, arg); @@ -447,6 +613,12 @@ static long pci_endpoint_test_ioctl(struct file *file, unsigned int cmd, case PCITEST_COPY: ret = pci_endpoint_test_copy(test, arg); break; + case PCITEST_SET_IRQTYPE: + ret = pci_endpoint_test_set_irq(test, arg); + break; + case PCITEST_GET_IRQTYPE: + ret = irq_type; + break; } ret: @@ -462,9 +634,7 @@ static const struct file_operations pci_endpoint_test_fops = { static int pci_endpoint_test_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { - int i; int err; - int irq = 0; int id; char name[20]; enum pci_barno bar; @@ -486,11 +656,14 @@ static int pci_endpoint_test_probe(struct pci_dev *pdev, test->alignment = 0; test->pdev = pdev; + if (no_msi) + irq_type = IRQ_TYPE_LEGACY; + data = (struct pci_endpoint_test_data *)ent->driver_data; if (data) { test_reg_bar = data->test_reg_bar; test->alignment = data->alignment; - no_msi = data->no_msi; + irq_type = data->irq_type; } init_completion(&test->irq_raised); @@ -510,28 +683,11 @@ static int pci_endpoint_test_probe(struct pci_dev *pdev, pci_set_master(pdev); - if (!no_msi) { - irq = pci_alloc_irq_vectors(pdev, 1, 32, PCI_IRQ_MSI); - if (irq < 0) - dev_err(dev, "Failed to get MSI interrupts\n"); - test->num_irqs = irq; - } - - err = devm_request_irq(dev, pdev->irq, pci_endpoint_test_irqhandler, - IRQF_SHARED, DRV_MODULE_NAME, test); - if (err) { - dev_err(dev, "Failed to request IRQ %d\n", pdev->irq); - goto err_disable_msi; - } + if (!pci_endpoint_test_alloc_irq_vectors(test, irq_type)) + goto err_disable_irq; - for (i = 1; i < irq; i++) { - err = devm_request_irq(dev, pci_irq_vector(pdev, i), - pci_endpoint_test_irqhandler, - IRQF_SHARED, DRV_MODULE_NAME, test); - if (err) - dev_err(dev, "failed to request IRQ %d for MSI %d\n", - pci_irq_vector(pdev, i), i + 1); - } + if (!pci_endpoint_test_request_irq(test)) + goto err_disable_irq; for (bar = BAR_0; bar <= BAR_5; bar++) { if (pci_resource_flags(pdev, bar) & IORESOURCE_MEM) { @@ -590,12 +746,10 @@ err_iounmap: if (test->bar[bar]) pci_iounmap(pdev, test->bar[bar]); } + pci_endpoint_test_release_irq(test); - for (i = 0; i < irq; i++) - devm_free_irq(&pdev->dev, pci_irq_vector(pdev, i), test); - -err_disable_msi: - pci_disable_msi(pdev); +err_disable_irq: + pci_endpoint_test_free_irq_vectors(test); pci_release_regions(pdev); err_disable_pdev: @@ -607,7 +761,6 @@ err_disable_pdev: static void pci_endpoint_test_remove(struct pci_dev *pdev) { int id; - int i; enum pci_barno bar; struct pci_endpoint_test *test = pci_get_drvdata(pdev); struct miscdevice *misc_device = &test->miscdev; @@ -624,9 +777,10 @@ static void pci_endpoint_test_remove(struct pci_dev *pdev) if (test->bar[bar]) pci_iounmap(pdev, test->bar[bar]); } - for (i = 0; i < test->num_irqs; i++) - devm_free_irq(&pdev->dev, pci_irq_vector(pdev, i), test); - pci_disable_msi(pdev); + + pci_endpoint_test_release_irq(test); + pci_endpoint_test_free_irq_vectors(test); + pci_release_regions(pdev); pci_disable_device(pdev); } |