search for: arch_setup_msi_irq

...d, 222 insertions(+), 154 deletions(-) > > diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c > index 41c33da..f0c5989 100644 > --- a/drivers/pci/msi.c > +++ b/drivers/pci/msi.c > @@ -29,8 +29,9 @@ static int pci_msi_enable = 1; > > /* Arch hooks */ > > -int __weak arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc) > +int __weak arch_setup_msi_irq(struct msi_irqs *msi, struct msi_desc *desc) > { > + struct pci_dev *dev = msi->data; //TO BE DONE: rework msi_chip to support > Non-PCI > struct msi_chip *chip = dev->bus->msi; > int err; &...

...d, 222 insertions(+), 154 deletions(-) > > diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c > index 41c33da..f0c5989 100644 > --- a/drivers/pci/msi.c > +++ b/drivers/pci/msi.c > @@ -29,8 +29,9 @@ static int pci_msi_enable = 1; > > /* Arch hooks */ > > -int __weak arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc) > +int __weak arch_setup_msi_irq(struct msi_irqs *msi, struct msi_desc *desc) > { > + struct pci_dev *dev = msi->data; //TO BE DONE: rework msi_chip to support > Non-PCI > struct msi_chip *chip = dev->bus->msi; > int err; &...

...- include/linux/pci.h | 11 +- 3 files changed, 222 insertions(+), 154 deletions(-) diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c index 41c33da..f0c5989 100644 --- a/drivers/pci/msi.c +++ b/drivers/pci/msi.c @@ -29,8 +29,9 @@ static int pci_msi_enable = 1; /* Arch hooks */ -int __weak arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc) +int __weak arch_setup_msi_irq(struct msi_irqs *msi, struct msi_desc *desc) { + struct pci_dev *dev = msi->data; //TO BE DONE: rework msi_chip to support Non-PCI struct msi_chip *chip = dev->bus->msi; int err; @@ -56,8 +57,9 @@ void __weak...

...+#include <linux/msi.h> > +#include <linux/smp.h> > +#include <linux/errno.h> > +#include <linux/io.h> > +#include <linux/slab.h> > +#include <linux/device.h> > +#include <linux/pci.h> > + > +/* Arch hooks */ > + > +int __weak arch_setup_msi_irq(struct msi_irqs *msi, struct msi_desc *desc) > +{ > + struct pci_dev *dev = msi->data; > + struct msi_chip *chip = dev->bus->msi; //TO BE DONE: rework msi_chip to > support Non-PCI MSI > + int err; > + > + if (!chip || !chip->setup_irq) > + return -EINVAL; >...

...+#include <linux/msi.h> > +#include <linux/smp.h> > +#include <linux/errno.h> > +#include <linux/io.h> > +#include <linux/slab.h> > +#include <linux/device.h> > +#include <linux/pci.h> > + > +/* Arch hooks */ > + > +int __weak arch_setup_msi_irq(struct msi_irqs *msi, struct msi_desc *desc) > +{ > + struct pci_dev *dev = msi->data; > + struct msi_chip *chip = dev->bus->msi; //TO BE DONE: rework msi_chip to > support Non-PCI MSI > + int err; > + > + if (!chip || !chip->setup_irq) > + return -EINVAL; >...

...nux/ioport.h> +#include <linux/proc_fs.h> +#include <linux/msi.h> +#include <linux/smp.h> +#include <linux/errno.h> +#include <linux/io.h> +#include <linux/slab.h> +#include <linux/device.h> +#include <linux/pci.h> + +/* Arch hooks */ + +int __weak arch_setup_msi_irq(struct msi_irqs *msi, struct msi_desc *desc) +{ + struct pci_dev *dev = msi->data; + struct msi_chip *chip = dev->bus->msi; //TO BE DONE: rework msi_chip to support Non-PCI MSI + int err; + + if (!chip || !chip->setup_irq) + return -EINVAL; + + err = chip->setup_irq(chip, dev, desc)...

Hi all, The series is a draft of generic MSI driver that supports PCI and Non-PCI device which have MSI capability. If you're not interested it, sorry for the noise. The series is based on Linux-3.16-rc1. MSI was introduced in PCI Spec 2.2. Currently, kernel MSI driver codes are bonding with PCI device. Because MSI has a lot advantages in design. More and more non-PCI devices want to use

Hi all, The series is a draft of generic MSI driver that supports PCI and Non-PCI device which have MSI capability. If you're not interested it, sorry for the noise. The series is based on Linux-3.16-rc1. MSI was introduced in PCI Spec 2.2. Currently, kernel MSI driver codes are bonding with PCI device. Because MSI has a lot advantages in design. More and more non-PCI devices want to use

On Sun, 12 May 2019, Halil Pasic wrote: > I've also got code that deals with AIRQ_IV_CACHELINE by turning the > kmem_cache into a dma_pool. > > Cornelia, Sebastian which approach do you prefer: > 1) get rid of cio_dma_pool and AIRQ_IV_CACHELINE, and waste a page per > vector, or > 2) go with the approach taken by the patch below? We only have a couple of users for

On Sun, 12 May 2019, Halil Pasic wrote: > I've also got code that deals with AIRQ_IV_CACHELINE by turning the > kmem_cache into a dma_pool. > > Cornelia, Sebastian which approach do you prefer: > 1) get rid of cio_dma_pool and AIRQ_IV_CACHELINE, and waste a page per > vector, or > 2) go with the approach taken by the patch below? We only have a couple of users for

...20 * 256 * 8 = 40960 bits. > > In practice it is most likely just 2k. > > > > > pci with floating IRQs: <= 2K (for the per-function bit vectors) > > 1..4K (for the summary bit vector) > > > > As far as I can tell with virtio_pci arch_setup_msi_irqs() gets called > once per device and allocates a small number of bits (2 and 3 in my > test, it may depend on #virtqueues, but I did not check). > > So for an upper bound we would have to multiply with the upper bound of > pci devices/functions. What is the upper bound on the number...

...more like: MAX_AIRQ_AREAS * VIRTIO_IV_BITS = 20 * 256 * 8 = 40960 bits. In practice it is most likely just 2k. > > pci with floating IRQs: <= 2K (for the per-function bit vectors) > 1..4K (for the summary bit vector) > As far as I can tell with virtio_pci arch_setup_msi_irqs() gets called once per device and allocates a small number of bits (2 and 3 in my test, it may depend on #virtqueues, but I did not check). So for an upper bound we would have to multiply with the upper bound of pci devices/functions. What is the upper bound on the number of functions? > pci...

...| 2 -- include/linux/msi.h | 1 - 4 files changed, 3 insertions(+), 6 deletions(-) diff --git a/arch/mips/pci/msi-octeon.c b/arch/mips/pci/msi-octeon.c index ab0c5d1..6a6a99f 100644 --- a/arch/mips/pci/msi-octeon.c +++ b/arch/mips/pci/msi-octeon.c @@ -73,7 +73,7 @@ int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc) * wants. Most devices only want 1, which will give * configured_private_bits and request_private_bits equal 0. */ - pci_read_config_word(dev, desc->msi_attrib.pos + PCI_MSI_FLAGS, + pci_read_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS,...

...diff --git a/arch/x86/kernel/x86_init.c b/arch/x86/kernel/x86_init.c > index e48b674..a277faf 100644 > --- a/arch/x86/kernel/x86_init.c > +++ b/arch/x86/kernel/x86_init.c > @@ -121,14 +121,14 @@ struct x86_msi_ops x86_msi = { > }; > > /* MSI arch specific hooks */ > -int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type) > +int arch_setup_msi_irqs(struct msi_irqs *msi, int nvec, int type) > { > - return x86_msi.setup_msi_irqs(dev, nvec, type); > + return x86_msi.setup_msi_irqs(msi, nvec, type); > } > > -void arch_teardown_msi_irqs(struct pci_dev *dev...

...diff --git a/arch/x86/kernel/x86_init.c b/arch/x86/kernel/x86_init.c > index e48b674..a277faf 100644 > --- a/arch/x86/kernel/x86_init.c > +++ b/arch/x86/kernel/x86_init.c > @@ -121,14 +121,14 @@ struct x86_msi_ops x86_msi = { > }; > > /* MSI arch specific hooks */ > -int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type) > +int arch_setup_msi_irqs(struct msi_irqs *msi, int nvec, int type) > { > - return x86_msi.setup_msi_irqs(dev, nvec, type); > + return x86_msi.setup_msi_irqs(msi, nvec, type); > } > > -void arch_teardown_msi_irqs(struct pci_dev *dev...

...irq_free_hwirq(irq); return ret; diff --git a/arch/x86/kernel/x86_init.c b/arch/x86/kernel/x86_init.c index e48b674..a277faf 100644 --- a/arch/x86/kernel/x86_init.c +++ b/arch/x86/kernel/x86_init.c @@ -121,14 +121,14 @@ struct x86_msi_ops x86_msi = { }; /* MSI arch specific hooks */ -int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type) +int arch_setup_msi_irqs(struct msi_irqs *msi, int nvec, int type) { - return x86_msi.setup_msi_irqs(dev, nvec, type); + return x86_msi.setup_msi_irqs(msi, nvec, type); } -void arch_teardown_msi_irqs(struct pci_dev *dev) +void arch_teardown_msi_irqs(str...