Hi Gustavo, On Monday 16 July 2018 08:22 PM, Gustavo Pimentel wrote: > Add MSI-X support and update driver documentation accordingly. > > Add 2 new IOCTL commands: > - Allow to reconfigure driver IRQ type in runtime. > - Allow to retrieve current driver IRQ type configured. > > Add IRQ type validation before executing the READ/WRITE/COPY tests. > > Signed-off-by: Gustavo Pimentel <gustavo.pimentel@xxxxxxxxxxxx> > --- > Change v2->v3: > - New patch file created base on the previous patch > "misc: pci_endpoint_test: Add MSI-X support" patch file following > Kishon's suggestion. > Change v3->v4: > - Rebased to Lorenzo's master branch v4.18-rc1. > Change v4->v5: > - Nothing changed, just to follow the patch set version. > Change v5->v6: > - Moved PCITEST_SET_IRQTYPE and PCITEST_GET_IRQTYPE ioctl entries > from patch #10 to here. > - Increased ioctl parameters range associated to > drivers/misc/pci_endpoint_test.c driver. > Change v6->v7: > - irq_type variable update just before returning the function. > Change v7->v8: > - Re-sending the patch series. > Change v8->v9: > - Added a extra parameter to pci_endpoint_test_alloc_irq_vectors, > that specifies which irq type should be allocated. > Change v9->v10: > - Fixed bug, report available: https://lkml.org/lkml/2018/7/16/11 > - Added IRQ type validation before executing the READ/WRITE/COPY > tests. > > Documentation/ioctl/ioctl-number.txt | 2 +- > Documentation/misc-devices/pci-endpoint-test.txt | 3 + > drivers/misc/pci_endpoint_test.c | 192 +++++++++++++++++------ > include/uapi/linux/pcitest.h | 2 + > 4 files changed, 152 insertions(+), 47 deletions(-) > > diff --git a/Documentation/ioctl/ioctl-number.txt b/Documentation/ioctl/ioctl-number.txt > index 65259d4..c15c4f3 100644 > --- a/Documentation/ioctl/ioctl-number.txt > +++ b/Documentation/ioctl/ioctl-number.txt > @@ -166,7 +166,7 @@ Code Seq#(hex) Include File Comments > 'P' all linux/soundcard.h conflict! > 'P' 60-6F sound/sscape_ioctl.h conflict! > 'P' 00-0F drivers/usb/class/usblp.c conflict! > -'P' 01-07 drivers/misc/pci_endpoint_test.c conflict! > +'P' 01-09 drivers/misc/pci_endpoint_test.c conflict! > 'Q' all linux/soundcard.h > 'R' 00-1F linux/random.h conflict! > 'R' 01 linux/rfkill.h conflict! > diff --git a/Documentation/misc-devices/pci-endpoint-test.txt b/Documentation/misc-devices/pci-endpoint-test.txt > index fdfa0f6..58ccca4 100644 > --- a/Documentation/misc-devices/pci-endpoint-test.txt > +++ b/Documentation/misc-devices/pci-endpoint-test.txt > @@ -28,6 +28,9 @@ ioctl > to be tested should be passed as argument. > PCITEST_MSIX: Tests message signalled interrupts. The MSI-X number > to be tested should be passed as argument. > + PCITEST_SET_IRQTYPE: Changes driver IRQ type configuration. The IRQ type > + should be passed as argument (0: Legacy, 1:MSI, 2:MSI-X). > + PCITEST_GET_IRQTYPE: Gets driver IRQ type configuration. > PCITEST_WRITE: Perform write tests. The size of the buffer should be passed > as argument. > PCITEST_READ: Perform read tests. The size of the buffer should be passed > diff --git a/drivers/misc/pci_endpoint_test.c b/drivers/misc/pci_endpoint_test.c > index f4fef10..d909ca5 100644 > --- a/drivers/misc/pci_endpoint_test.c > +++ b/drivers/misc/pci_endpoint_test.c > @@ -37,6 +37,7 @@ > > #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 > @@ -157,6 +158,88 @@ 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) > +{ > + 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_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 = 0; > + 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) > +{ > + struct pci_dev *pdev = test->pdev; > + > + pci_disable_msi(pdev); > + pci_disable_msix(pdev); > +} > + > +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; > + > + 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); > + return false; > + } > + > + for (i = 1; 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) > + dev_err(dev, "Failed to request IRQ %d for MSI%s %d\n", > + pci_irq_vector(pdev, i), > + irq_type == IRQ_TYPE_MSIX ? "-X" : "", i + 1); > + } > + > + return true; > +} > + > static bool pci_endpoint_test_bar(struct pci_endpoint_test *test, > enum pci_barno barno) > { > @@ -247,6 +330,11 @@ 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) { > @@ -337,6 +425,11 @@ 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) { > @@ -400,6 +493,11 @@ 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) { > @@ -440,6 +538,38 @@ static bool pci_endpoint_test_read(struct pci_endpoint_test *test, size_t size) > 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_free_irq_vectors(test); > + pci_endpoint_test_release_irq(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_release_irq(test); sorry for not noticing this earlier.. pci_endpoint_test_alloc_irq_vectors enables MSI.. I'd have expected pci_endpoint_test_free_irq_vectors to disable MSI. Similarly pci_endpoint_test_request_irq requests irq. Ideally pci_endpoint_test_release_irq should have freed irq. I feel the contents of pci_endpoint_test_release_irq() and pci_endpoint_test_free_irq_vectors are swapped. For the patch itself, I have tested it now and the issue I reported earlier is not seen in this series. Thanks Kishon -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
