Displaying 20 results from an estimated 167 matches for "irq_non".
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2009 May 07
1
[PATCH 2/3] virtio_pci: split up vp_interrupt
...fig_changed)
+ drv->config_changed(&vp_dev->vdev);
+ return IRQ_HANDLED;
+}
+
+/* Notify all virtqueues on an interrupt. */
+static irqreturn_t vp_vring_interrupt(int irq, void *opaque)
+{
+ struct virtio_pci_device *vp_dev = opaque;
+ struct virtio_pci_vq_info *info;
+ irqreturn_t ret = IRQ_NONE;
+ unsigned long flags;
+
+ spin_lock_irqsave(&vp_dev->lock, flags);
+ list_for_each_entry(info, &vp_dev->virtqueues, node) {
+ if (vring_interrupt(irq, info->vq) == IRQ_HANDLED)
+ ret = IRQ_HANDLED;
+ }
+ spin_unlock_irqrestore(&vp_dev->lock, flags);
+
+ return ret;
+}...
2009 May 07
1
[PATCH 2/3] virtio_pci: split up vp_interrupt
...fig_changed)
+ drv->config_changed(&vp_dev->vdev);
+ return IRQ_HANDLED;
+}
+
+/* Notify all virtqueues on an interrupt. */
+static irqreturn_t vp_vring_interrupt(int irq, void *opaque)
+{
+ struct virtio_pci_device *vp_dev = opaque;
+ struct virtio_pci_vq_info *info;
+ irqreturn_t ret = IRQ_NONE;
+ unsigned long flags;
+
+ spin_lock_irqsave(&vp_dev->lock, flags);
+ list_for_each_entry(info, &vp_dev->virtqueues, node) {
+ if (vring_interrupt(irq, info->vq) == IRQ_HANDLED)
+ ret = IRQ_HANDLED;
+ }
+ spin_unlock_irqrestore(&vp_dev->lock, flags);
+
+ return ret;
+}...
2009 Apr 27
0
[PATCH 7/8] virtio_pci: split up vp_interrupt
...fig_changed)
+ drv->config_changed(&vp_dev->vdev);
+ return IRQ_HANDLED;
+}
+
+/* Notify all virtqueues on an interrupt. */
+static irqreturn_t vp_vring_interrupt(int irq, void *opaque)
+{
+ struct virtio_pci_device *vp_dev = opaque;
+ struct virtio_pci_vq_info *info;
+ irqreturn_t ret = IRQ_NONE;
+ unsigned long flags;
+
+ spin_lock_irqsave(&vp_dev->lock, flags);
+ list_for_each_entry(info, &vp_dev->virtqueues, node) {
+ if (vring_interrupt(irq, info->vq) == IRQ_HANDLED)
+ ret = IRQ_HANDLED;
+ }
+ spin_unlock_irqrestore(&vp_dev->lock, flags);
+
+ return ret;
+}...
2009 May 13
0
[PATCHv5 2/3] virtio_pci: split up vp_interrupt
...fig_changed)
+ drv->config_changed(&vp_dev->vdev);
+ return IRQ_HANDLED;
+}
+
+/* Notify all virtqueues on an interrupt. */
+static irqreturn_t vp_vring_interrupt(int irq, void *opaque)
+{
+ struct virtio_pci_device *vp_dev = opaque;
+ struct virtio_pci_vq_info *info;
+ irqreturn_t ret = IRQ_NONE;
+ unsigned long flags;
+
+ spin_lock_irqsave(&vp_dev->lock, flags);
+ list_for_each_entry(info, &vp_dev->virtqueues, node) {
+ if (vring_interrupt(irq, info->vq) == IRQ_HANDLED)
+ ret = IRQ_HANDLED;
+ }
+ spin_unlock_irqrestore(&vp_dev->lock, flags);
+
+ return ret;
+}...
2009 May 14
0
[PATCHv6 3/4] virtio_pci: split up vp_interrupt
...fig_changed)
+ drv->config_changed(&vp_dev->vdev);
+ return IRQ_HANDLED;
+}
+
+/* Notify all virtqueues on an interrupt. */
+static irqreturn_t vp_vring_interrupt(int irq, void *opaque)
+{
+ struct virtio_pci_device *vp_dev = opaque;
+ struct virtio_pci_vq_info *info;
+ irqreturn_t ret = IRQ_NONE;
+ unsigned long flags;
+
+ spin_lock_irqsave(&vp_dev->lock, flags);
+ list_for_each_entry(info, &vp_dev->virtqueues, node) {
+ if (vring_interrupt(irq, info->vq) == IRQ_HANDLED)
+ ret = IRQ_HANDLED;
+ }
+ spin_unlock_irqrestore(&vp_dev->lock, flags);
+
+ return ret;
+}...
2009 Apr 27
0
[PATCH 7/8] virtio_pci: split up vp_interrupt
...fig_changed)
+ drv->config_changed(&vp_dev->vdev);
+ return IRQ_HANDLED;
+}
+
+/* Notify all virtqueues on an interrupt. */
+static irqreturn_t vp_vring_interrupt(int irq, void *opaque)
+{
+ struct virtio_pci_device *vp_dev = opaque;
+ struct virtio_pci_vq_info *info;
+ irqreturn_t ret = IRQ_NONE;
+ unsigned long flags;
+
+ spin_lock_irqsave(&vp_dev->lock, flags);
+ list_for_each_entry(info, &vp_dev->virtqueues, node) {
+ if (vring_interrupt(irq, info->vq) == IRQ_HANDLED)
+ ret = IRQ_HANDLED;
+ }
+ spin_unlock_irqrestore(&vp_dev->lock, flags);
+
+ return ret;
+}...
2009 May 13
0
[PATCHv5 2/3] virtio_pci: split up vp_interrupt
...fig_changed)
+ drv->config_changed(&vp_dev->vdev);
+ return IRQ_HANDLED;
+}
+
+/* Notify all virtqueues on an interrupt. */
+static irqreturn_t vp_vring_interrupt(int irq, void *opaque)
+{
+ struct virtio_pci_device *vp_dev = opaque;
+ struct virtio_pci_vq_info *info;
+ irqreturn_t ret = IRQ_NONE;
+ unsigned long flags;
+
+ spin_lock_irqsave(&vp_dev->lock, flags);
+ list_for_each_entry(info, &vp_dev->virtqueues, node) {
+ if (vring_interrupt(irq, info->vq) == IRQ_HANDLED)
+ ret = IRQ_HANDLED;
+ }
+ spin_unlock_irqrestore(&vp_dev->lock, flags);
+
+ return ret;
+}...
2009 May 14
0
[PATCHv6 3/4] virtio_pci: split up vp_interrupt
...fig_changed)
+ drv->config_changed(&vp_dev->vdev);
+ return IRQ_HANDLED;
+}
+
+/* Notify all virtqueues on an interrupt. */
+static irqreturn_t vp_vring_interrupt(int irq, void *opaque)
+{
+ struct virtio_pci_device *vp_dev = opaque;
+ struct virtio_pci_vq_info *info;
+ irqreturn_t ret = IRQ_NONE;
+ unsigned long flags;
+
+ spin_lock_irqsave(&vp_dev->lock, flags);
+ list_for_each_entry(info, &vp_dev->virtqueues, node) {
+ if (vring_interrupt(irq, info->vq) == IRQ_HANDLED)
+ ret = IRQ_HANDLED;
+ }
+ spin_unlock_irqrestore(&vp_dev->lock, flags);
+
+ return ret;
+}...
2014 Sep 22
1
[PATCH] virtio: unify config_changed handling
Replace duplicated code in all transports with a single wrapper in
virtio.c.
The only functional change is in virtio_mmio.c: if a buggy device sends
us an interrupt before driver is set, we previously returned IRQ_NONE,
now we return IRQ_HANDLED.
As this must not happen in practice, this does not look like a big deal.
See also commit 3fff0179e33cd7d0a688dab65700c46ad089e934
virtio-pci: do not oops on config change if driver not loaded.
for the original motivation behind the driver check.
Signed-off-by: Micha...
2014 Sep 22
1
[PATCH] virtio: unify config_changed handling
Replace duplicated code in all transports with a single wrapper in
virtio.c.
The only functional change is in virtio_mmio.c: if a buggy device sends
us an interrupt before driver is set, we previously returned IRQ_NONE,
now we return IRQ_HANDLED.
As this must not happen in practice, this does not look like a big deal.
See also commit 3fff0179e33cd7d0a688dab65700c46ad089e934
virtio-pci: do not oops on config change if driver not loaded.
for the original motivation behind the driver check.
Signed-off-by: Micha...
2014 Oct 25
1
[RFC PATCH 2/2] Assign a new irq handler while irqfd enabled
...t irq, void *opaque)
return ret;
}
+/* Notify all virtqueues on an interrupt. */
+static irqreturn_t vm_interrupt_irqfd(int irq, void *opaque)
+{
+ struct virtio_mmio_device *vm_dev = opaque;
+ struct virtio_mmio_vq_info *info;
+ unsigned long status;
+ unsigned long flags;
+ irqreturn_t ret = IRQ_NONE;
+ /* Read the interrupt reason and reset it */
+ status = *vm_dev->isr_mem;
+ *vm_dev->isr_mem = 0x0;
+
+ if (unlikely(status & VIRTIO_MMIO_INT_CONFIG)) {
+ virtio_config_changed(&vm_dev->vdev);
+ ret = IRQ_HANDLED;
+ }
+
+ spin_lock_irqsave(&vm_dev->lock, flags);
+ li...
2014 Oct 25
1
[RFC PATCH 2/2] Assign a new irq handler while irqfd enabled
...t irq, void *opaque)
return ret;
}
+/* Notify all virtqueues on an interrupt. */
+static irqreturn_t vm_interrupt_irqfd(int irq, void *opaque)
+{
+ struct virtio_mmio_device *vm_dev = opaque;
+ struct virtio_mmio_vq_info *info;
+ unsigned long status;
+ unsigned long flags;
+ irqreturn_t ret = IRQ_NONE;
+ /* Read the interrupt reason and reset it */
+ status = *vm_dev->isr_mem;
+ *vm_dev->isr_mem = 0x0;
+
+ if (unlikely(status & VIRTIO_MMIO_INT_CONFIG)) {
+ virtio_config_changed(&vm_dev->vdev);
+ ret = IRQ_HANDLED;
+ }
+
+ spin_lock_irqsave(&vm_dev->lock, flags);
+ li...
2014 Oct 05
0
[PATCH 02/16] virtio: unify config_changed handling
Replace duplicated code in all transports with a single wrapper in
virtio.c.
The only functional change is in virtio_mmio.c: if a buggy device sends
us an interrupt before driver is set, we previously returned IRQ_NONE,
now we return IRQ_HANDLED.
As this must not happen in practice, this does not look like a big deal.
See also commit 3fff0179e33cd7d0a688dab65700c46ad089e934
virtio-pci: do not oops on config change if driver not loaded.
for the original motivation behind the driver check.
Signed-off-by: Micha...
2014 Oct 06
0
[PATCH v2 02/15] virtio: unify config_changed handling
Replace duplicated code in all transports with a single wrapper in
virtio.c.
The only functional change is in virtio_mmio.c: if a buggy device sends
us an interrupt before driver is set, we previously returned IRQ_NONE,
now we return IRQ_HANDLED.
As this must not happen in practice, this does not look like a big deal.
See also commit 3fff0179e33cd7d0a688dab65700c46ad089e934
virtio-pci: do not oops on config change if driver not loaded.
for the original motivation behind the driver check.
Signed-off-by: Micha...
2003 Dec 06
3
some success with linux 2.6 and wcfxo
......
make -C /usr/src/linux SUBDIRS=`pwd` modules
A few of the modules (the torisa and tor2 ones come to mind), don;t build at
all. The others will build but...
2. Interrupt return values now need to be given, if you convert the interrupt
handlers to return irqreturn_t, and return IRQ_HANDLED or IRQ_NONE as
appropriate (I mostly just guessed here as to whether the driver had done
anything useful, not terribly accurate, but it got things going).
Without this you get reports of spurious interrupt return values and all
other kinds of nasty stuff happens.
3. The module useage stuff is deprecated s...
2014 Nov 06
2
[RFC PATCH] virtio-mmio: support for multiple irqs
...>> {
>> struct virtio_mmio_device *vm_dev = opaque;
>> struct virtio_mmio_vq_info *info;
>> - struct virtio_driver *vdrv = container_of(vm_dev->vdev.dev.driver,
>> - struct virtio_driver, driver);
>> - unsigned long status;
>> + irqreturn_t ret = IRQ_NONE;
>> unsigned long flags;
>> +
>> + spin_lock_irqsave(&vm_dev->lock, flags);
>> + list_for_each_entry(info, &vm_dev->virtqueues, node) {
>> + if (vring_interrupt(irq, info->vq) == IRQ_HANDLED)
>> + ret = IRQ_HANDLED;
>> + }
>> +...
2014 Nov 06
2
[RFC PATCH] virtio-mmio: support for multiple irqs
...>> {
>> struct virtio_mmio_device *vm_dev = opaque;
>> struct virtio_mmio_vq_info *info;
>> - struct virtio_driver *vdrv = container_of(vm_dev->vdev.dev.driver,
>> - struct virtio_driver, driver);
>> - unsigned long status;
>> + irqreturn_t ret = IRQ_NONE;
>> unsigned long flags;
>> +
>> + spin_lock_irqsave(&vm_dev->lock, flags);
>> + list_for_each_entry(info, &vm_dev->virtqueues, node) {
>> + if (vring_interrupt(irq, info->vq) == IRQ_HANDLED)
>> + ret = IRQ_HANDLED;
>> + }
>> +...
2014 Oct 27
1
[RFC PATCH 2/2] Assign a new irq handler while irqfd enabled
...es on an interrupt. */
>> +static irqreturn_t vm_interrupt_irqfd(int irq, void *opaque)
>> +{
>> + struct virtio_mmio_device *vm_dev = opaque;
>> + struct virtio_mmio_vq_info *info;
>> + unsigned long status;
>> + unsigned long flags;
>> + irqreturn_t ret = IRQ_NONE;
>>
>> + /* Read the interrupt reason and reset it */
>> + status = *vm_dev->isr_mem;
>> + *vm_dev->isr_mem = 0x0;
>
> you are reading and modifying shared memory
> without atomics and any memory barriers.
> Why is this safe?
>
good catch, a stupid...
2014 Oct 27
1
[RFC PATCH 2/2] Assign a new irq handler while irqfd enabled
...es on an interrupt. */
>> +static irqreturn_t vm_interrupt_irqfd(int irq, void *opaque)
>> +{
>> + struct virtio_mmio_device *vm_dev = opaque;
>> + struct virtio_mmio_vq_info *info;
>> + unsigned long status;
>> + unsigned long flags;
>> + irqreturn_t ret = IRQ_NONE;
>>
>> + /* Read the interrupt reason and reset it */
>> + status = *vm_dev->isr_mem;
>> + *vm_dev->isr_mem = 0x0;
>
> you are reading and modifying shared memory
> without atomics and any memory barriers.
> Why is this safe?
>
good catch, a stupid...
2014 Nov 06
0
[RFC PATCH] virtio-mmio: support for multiple irqs
...rrupt(int irq, void *opaque)
> {
> struct virtio_mmio_device *vm_dev = opaque;
> struct virtio_mmio_vq_info *info;
> - struct virtio_driver *vdrv = container_of(vm_dev->vdev.dev.driver,
> - struct virtio_driver, driver);
> - unsigned long status;
> + irqreturn_t ret = IRQ_NONE;
> unsigned long flags;
> +
> + spin_lock_irqsave(&vm_dev->lock, flags);
> + list_for_each_entry(info, &vm_dev->virtqueues, node) {
> + if (vring_interrupt(irq, info->vq) == IRQ_HANDLED)
> + ret = IRQ_HANDLED;
> + }
> + spin_unlock_irqrestore(&vm_d...