search for: nvector

Displaying 20 results from an estimated 203 matches for "nvector".

Did you mean: vector
2017 Jan 27
0
[PATCH 4/9] virtio_pci: simplify MSI-X setup
...char * const names[], - bool per_vq_vectors) + struct virtqueue *vqs[], vq_callback_t *callbacks[], + const char * const names[]) { struct virtio_pci_device *vp_dev = to_vp_device(vdev); const char *name = dev_name(&vp_dev->vdev.dev); int i, err = -ENOMEM, allocated_vectors, nvectors; + bool shared = false; u16 msix_vec; - if (per_vq_vectors) { - /* Best option: one for change interrupt, one per vq. */ - nvectors = 1; - for (i = 0; i < nvqs; ++i) - if (callbacks[i]) - ++nvectors; - } else { - /* Second best: one for change, shared for all vqs. */ + nvectors = 1...
2014 Feb 19
3
[PATCH] virtio: Use pci_enable_msix_range() instead of pci_enable_msix()
...changed, 3 insertions(+), 5 deletions(-) diff --git a/drivers/virtio/virtio_pci.c b/drivers/virtio/virtio_pci.c index a416f9b..dea042c 100644 --- a/drivers/virtio/virtio_pci.c +++ b/drivers/virtio/virtio_pci.c @@ -333,11 +333,9 @@ static int vp_request_msix_vectors(struct virtio_device *vdev, int nvectors, for (i = 0; i < nvectors; ++i) vp_dev->msix_entries[i].entry = i; - /* pci_enable_msix returns positive if we can't get this many. */ - err = pci_enable_msix(vp_dev->pci_dev, vp_dev->msix_entries, nvectors); - if (err > 0) - err = -ENOSPC; - if (err) + err = pci_enable_...
2014 Feb 19
3
[PATCH] virtio: Use pci_enable_msix_range() instead of pci_enable_msix()
...changed, 3 insertions(+), 5 deletions(-) diff --git a/drivers/virtio/virtio_pci.c b/drivers/virtio/virtio_pci.c index a416f9b..dea042c 100644 --- a/drivers/virtio/virtio_pci.c +++ b/drivers/virtio/virtio_pci.c @@ -333,11 +333,9 @@ static int vp_request_msix_vectors(struct virtio_device *vdev, int nvectors, for (i = 0; i < nvectors; ++i) vp_dev->msix_entries[i].entry = i; - /* pci_enable_msix returns positive if we can't get this many. */ - err = pci_enable_msix(vp_dev->pci_dev, vp_dev->msix_entries, nvectors); - if (err > 0) - err = -ENOSPC; - if (err) + err = pci_enable_...
2017 Feb 05
0
[PATCH 2/9] virtio_pci: use shared interrupts for virtqueues
...(i = 1; i < vp_dev->msix_vectors; i++) synchronize_irq(pci_irq_vector(vp_dev->pci_dev, i)); } @@ -99,77 +97,10 @@ static irqreturn_t vp_interrupt(int irq, void *opaque) return vp_vring_interrupt(irq, opaque); } -static int vp_request_msix_vectors(struct virtio_device *vdev, int nvectors, - bool per_vq_vectors) -{ - struct virtio_pci_device *vp_dev = to_vp_device(vdev); - const char *name = dev_name(&vp_dev->vdev.dev); - unsigned i, v; - int err = -ENOMEM; - - vp_dev->msix_vectors = nvectors; - - vp_dev->msix_names = kmalloc(nvectors * sizeof *vp_dev->msix_na...
2013 Jun 20
3
[PATCH] virtio-pci: fix leaks of msix_affinity_masks
...t;pci_dev); vp_dev->msix_enabled = 0; - vp_dev->msix_vectors = 0; } + vp_dev->msix_vectors = 0; vp_dev->msix_used_vectors = 0; kfree(vp_dev->msix_names); vp_dev->msix_names = NULL; @@ -309,6 +309,8 @@ static int vp_request_msix_vectors(struct virtio_device *vdev, int nvectors, unsigned i, v; int err = -ENOMEM; + vp_dev->msix_vectors = nvectors; + vp_dev->msix_entries = kmalloc(nvectors * sizeof *vp_dev->msix_entries, GFP_KERNEL); if (!vp_dev->msix_entries) @@ -336,7 +338,6 @@ static int vp_request_msix_vectors(struct virtio_device *vde...
2013 Jun 20
3
[PATCH] virtio-pci: fix leaks of msix_affinity_masks
...t;pci_dev); vp_dev->msix_enabled = 0; - vp_dev->msix_vectors = 0; } + vp_dev->msix_vectors = 0; vp_dev->msix_used_vectors = 0; kfree(vp_dev->msix_names); vp_dev->msix_names = NULL; @@ -309,6 +309,8 @@ static int vp_request_msix_vectors(struct virtio_device *vdev, int nvectors, unsigned i, v; int err = -ENOMEM; + vp_dev->msix_vectors = nvectors; + vp_dev->msix_entries = kmalloc(nvectors * sizeof *vp_dev->msix_entries, GFP_KERNEL); if (!vp_dev->msix_entries) @@ -336,7 +338,6 @@ static int vp_request_msix_vectors(struct virtio_device *vde...
2014 Apr 19
1
RFC: sharing config interrupt between virtio devices for saving MSI
...++ b/drivers/virtio/virtio_pci.c @@ -302,6 +302,8 @@ static void vp_free_vectors(struct virtio_device *vdev) vp_dev->msix_affinity_masks = NULL; } +//static msix_entry *config_msix_entry; +static char config_msix_name[100]; static int vp_request_msix_vectors(struct virtio_device *vdev, int nvectors, bool per_vq_vectors) { @@ -341,14 +343,13 @@ static int vp_request_msix_vectors(struct virtio_device *vdev, int nvectors, /* Set the vector used for configuration */ v = vp_dev->msix_used_vectors; - snprintf(vp_dev->msix_names[v], sizeof *vp_dev->msix_names, + snprintf(con...
2014 Apr 19
1
RFC: sharing config interrupt between virtio devices for saving MSI
...++ b/drivers/virtio/virtio_pci.c @@ -302,6 +302,8 @@ static void vp_free_vectors(struct virtio_device *vdev) vp_dev->msix_affinity_masks = NULL; } +//static msix_entry *config_msix_entry; +static char config_msix_name[100]; static int vp_request_msix_vectors(struct virtio_device *vdev, int nvectors, bool per_vq_vectors) { @@ -341,14 +343,13 @@ static int vp_request_msix_vectors(struct virtio_device *vdev, int nvectors, /* Set the vector used for configuration */ v = vp_dev->msix_used_vectors; - snprintf(vp_dev->msix_names[v], sizeof *vp_dev->msix_names, + snprintf(con...
2016 Nov 06
8
virtio_pci irq handling cleanups
Hi Michael, this series contains a couple cleanups for the virtio_pci interrupt handling code, including a switch to the new pci_irq_alloc_vectors helper. All these are in preparation of taking advantage of the new PCI layer / core IRQ interrupt affinity handling, for which I will send out a series once this and some core interrupt handling changes are in.
2016 Nov 06
8
virtio_pci irq handling cleanups
Hi Michael, this series contains a couple cleanups for the virtio_pci interrupt handling code, including a switch to the new pci_irq_alloc_vectors helper. All these are in preparation of taking advantage of the new PCI layer / core IRQ interrupt affinity handling, for which I will send out a series once this and some core interrupt handling changes are in.
2014 Sep 01
3
[PATCH RFC] virtio-pci: share config interrupt between virtio devices
...addr + VIRTIO_MSI_CONFIG_VECTOR); - /* Flush the write out to device */ - ioread16(vp_dev->ioaddr + VIRTIO_MSI_CONFIG_VECTOR); - pci_disable_msix(vp_dev->pci_dev); vp_dev->msix_enabled = 0; } @@ -339,24 +334,18 @@ static int vp_request_msix_vectors(struct virtio_device *vdev, int nvectors, goto error; vp_dev->msix_enabled = 1; - /* Set the vector used for configuration */ - v = vp_dev->msix_used_vectors; - snprintf(vp_dev->msix_names[v], sizeof *vp_dev->msix_names, + /* Set shared IRQ for configuration */ + snprintf(vp_dev->config_msix_name, sizeof(*vp_dev-&gt...
2014 Sep 01
3
[PATCH RFC] virtio-pci: share config interrupt between virtio devices
...addr + VIRTIO_MSI_CONFIG_VECTOR); - /* Flush the write out to device */ - ioread16(vp_dev->ioaddr + VIRTIO_MSI_CONFIG_VECTOR); - pci_disable_msix(vp_dev->pci_dev); vp_dev->msix_enabled = 0; } @@ -339,24 +334,18 @@ static int vp_request_msix_vectors(struct virtio_device *vdev, int nvectors, goto error; vp_dev->msix_enabled = 1; - /* Set the vector used for configuration */ - v = vp_dev->msix_used_vectors; - snprintf(vp_dev->msix_names[v], sizeof *vp_dev->msix_names, + /* Set shared IRQ for configuration */ + snprintf(vp_dev->config_msix_name, sizeof(*vp_dev-&gt...
2010 Mar 25
2
[PATCH v3 1/1] Shared memory uio_pci driver
...h> > + > +#include <asm/io.h> > + > +#define IntrStatus 0x04 > +#define IntrMask 0x00 > + > +struct ivshmem_info { > + struct uio_info *uio; > + struct pci_dev *dev; > + char (*msix_names)[256]; > + struct msix_entry *msix_entries; > + int nvectors; > +}; > + > +static irqreturn_t ivshmem_handler(int irq, struct uio_info *dev_info) > +{ > + > + void __iomem *plx_intscr = dev_info->mem[0].internal_addr > + + IntrStatus; > + u32 val; > + > + val = readl(plx_intscr); > + if (val...
2010 Mar 25
2
[PATCH v3 1/1] Shared memory uio_pci driver
...h> > + > +#include <asm/io.h> > + > +#define IntrStatus 0x04 > +#define IntrMask 0x00 > + > +struct ivshmem_info { > + struct uio_info *uio; > + struct pci_dev *dev; > + char (*msix_names)[256]; > + struct msix_entry *msix_entries; > + int nvectors; > +}; > + > +static irqreturn_t ivshmem_handler(int irq, struct uio_info *dev_info) > +{ > + > + void __iomem *plx_intscr = dev_info->mem[0].internal_addr > + + IntrStatus; > + u32 val; > + > + val = readl(plx_intscr); > + if (val...
2013 Jun 19
2
[PATCH] virtio-pci: fix leaks of msix_affinity_masks
...s changed, 2 insertions(+), 1 deletions(-) diff --git a/drivers/virtio/virtio_pci.c b/drivers/virtio/virtio_pci.c index a7ce730..3c0a6ef 100644 --- a/drivers/virtio/virtio_pci.c +++ b/drivers/virtio/virtio_pci.c @@ -309,6 +309,8 @@ static int vp_request_msix_vectors(struct virtio_device *vdev, int nvectors, unsigned i, v; int err = -ENOMEM; + vp_dev->msix_vectors = nvectors; + vp_dev->msix_entries = kmalloc(nvectors * sizeof *vp_dev->msix_entries, GFP_KERNEL); if (!vp_dev->msix_entries) @@ -336,7 +338,6 @@ static int vp_request_msix_vectors(struct virtio_device *vde...
2013 Jun 19
2
[PATCH] virtio-pci: fix leaks of msix_affinity_masks
...s changed, 2 insertions(+), 1 deletions(-) diff --git a/drivers/virtio/virtio_pci.c b/drivers/virtio/virtio_pci.c index a7ce730..3c0a6ef 100644 --- a/drivers/virtio/virtio_pci.c +++ b/drivers/virtio/virtio_pci.c @@ -309,6 +309,8 @@ static int vp_request_msix_vectors(struct virtio_device *vdev, int nvectors, unsigned i, v; int err = -ENOMEM; + vp_dev->msix_vectors = nvectors; + vp_dev->msix_entries = kmalloc(nvectors * sizeof *vp_dev->msix_entries, GFP_KERNEL); if (!vp_dev->msix_entries) @@ -336,7 +338,6 @@ static int vp_request_msix_vectors(struct virtio_device *vde...
2017 Jan 27
0
[PATCH 2/9] virtio_pci: use shared interrupts for virtqueues
...(i = 1; i < vp_dev->msix_vectors; i++) synchronize_irq(pci_irq_vector(vp_dev->pci_dev, i)); } @@ -99,77 +97,10 @@ static irqreturn_t vp_interrupt(int irq, void *opaque) return vp_vring_interrupt(irq, opaque); } -static int vp_request_msix_vectors(struct virtio_device *vdev, int nvectors, - bool per_vq_vectors) -{ - struct virtio_pci_device *vp_dev = to_vp_device(vdev); - const char *name = dev_name(&vp_dev->vdev.dev); - unsigned i, v; - int err = -ENOMEM; - - vp_dev->msix_vectors = nvectors; - - vp_dev->msix_names = kmalloc(nvectors * sizeof *vp_dev->msix_na...
2016 Nov 17
13
automatic IRQ affinity for virtio
Hi Michael, this series contains a couple cleanups for the virtio_pci interrupt handling code, including a switch to the new pci_irq_alloc_vectors helper, and support for automatic affinity by the PCI layer if the consumers ask for it. It then converts over virtio_blk to use this functionality so that it's blk-mq queues are aligned to the MSI-X vector routing. I have a similar patch in the
2016 Nov 17
13
automatic IRQ affinity for virtio
Hi Michael, this series contains a couple cleanups for the virtio_pci interrupt handling code, including a switch to the new pci_irq_alloc_vectors helper, and support for automatic affinity by the PCI layer if the consumers ask for it. It then converts over virtio_blk to use this functionality so that it's blk-mq queues are aligned to the MSI-X vector routing. I have a similar patch in the
2009 Sep 21
0
[PATCH 1/6] virtio_pci: minor MSI-X cleanups
1) Rename vp_request_vectors to vp_request_msix_vectors, and take non-MSI-X case out to caller. 2) Comment weird pci_enable_msix API 3) Rename vp_find_vq to setup_vq. 4) Fix spaces to tabs 5) Make nvectors calc internal to vp_try_to_find_vqs() 6) Rename vector to msix_vector for more clarity. Signed-off-by: Rusty Russell <rusty at rustcorp.com.au> Cc: "Michael S. Tsirkin" <mst at redhat.com> --- drivers/virtio/virtio_pci.c | 89 ++++++++++++++++++++++++--------------------...