Message ID | 0dc487515e28a6cd790888cb98f84fb7ea3a412e.1531751641.git.gustavo.pimentel@synopsys.com |
---|---|
State | Superseded |
Delegated to: | Lorenzo Pieralisi |
Headers | show |
Series | Add MSI-X support on pcitest tool | expand |
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@synopsys.com> > --- > 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
Hi, Kishon, On 17/07/2018 03:43, Kishon Vijay Abraham I wrote: > 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@synopsys.com> >> --- >> 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://urldefense.proofpoint.com/v2/url?u=https-3A__lkml.org_lkml_2018_7_16_11&d=DwIC-g&c=DPL6_X_6JkXFx7AXWqB0tg&r=bkWxpLoW-f-E3EdiDCCa0_h0PicsViasSlvIpzZvPxs&m=kfPim9EoIsdNO2BRH1BV6fsKhqV4Qy_JAofUZ2bPmpg&s=sz6k8lKVuC2tpzwc3T-OwE9ShzNwtALcrS_fuJGfiK0&e= >> - 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. I just sent the patch series V12 with that swapped. Please give the Acked for the missing patches #4, #7 and #10 (if you agree) to close this patch series. > > Thanks > Kishon > Regards, Gustavo
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); + irq_type = IRQ_TYPE_UNDEFINED; + return false; +} + static long pci_endpoint_test_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { @@ -471,6 +601,12 @@ 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: @@ -486,9 +622,7 @@ 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; @@ -537,41 +671,11 @@ static int pci_endpoint_test_probe(struct pci_dev *pdev, pci_set_master(pdev); - switch (irq_type) { - case IRQ_TYPE_LEGACY: - 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"); - test->num_irqs = irq; - 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"); - test->num_irqs = irq; - break; - default: - dev_err(dev, "Invalid IRQ type selected\n"); - } - - 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%s %d\n", - pci_irq_vector(pdev, i), - irq_type == IRQ_TYPE_MSIX ? "-X" : "", 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) { @@ -631,12 +735,10 @@ static int pci_endpoint_test_probe(struct pci_dev *pdev, pci_iounmap(pdev, test->bar[bar]); } - for (i = 0; i < irq; i++) - devm_free_irq(&pdev->dev, pci_irq_vector(pdev, i), test); + pci_endpoint_test_free_irq_vectors(test); -err_disable_msi: - pci_disable_msi(pdev); - pci_disable_msix(pdev); +err_disable_irq: + pci_endpoint_test_release_irq(test); pci_release_regions(pdev); err_disable_pdev: @@ -648,7 +750,6 @@ static int pci_endpoint_test_probe(struct pci_dev *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; @@ -665,10 +766,9 @@ 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_disable_msix(pdev); + pci_endpoint_test_free_irq_vectors(test); + + pci_endpoint_test_release_irq(test); pci_release_regions(pdev); pci_disable_device(pdev); } diff --git a/include/uapi/linux/pcitest.h b/include/uapi/linux/pcitest.h index d746fb1..cbf422e 100644 --- a/include/uapi/linux/pcitest.h +++ b/include/uapi/linux/pcitest.h @@ -17,5 +17,7 @@ #define PCITEST_READ _IOW('P', 0x5, unsigned long) #define PCITEST_COPY _IOW('P', 0x6, unsigned long) #define PCITEST_MSIX _IOW('P', 0x7, int) +#define PCITEST_SET_IRQTYPE _IOW('P', 0x8, int) +#define PCITEST_GET_IRQTYPE _IO('P', 0x9) #endif /* __UAPI_LINUX_PCITEST_H */
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@synopsys.com> --- 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(-)