search for: add_req

...which changes resv_mem parameters and adds > an MMIO flag. These are trivial but not backward compatible. Once > device or driver is upstream, updates to the spec will rely on feature > bits to stay compatible with this code. > * Implement the new tlb_sync interface, by splitting add_req() and > sync_req(). I noticed a small improvement on netperf stream because > the synchronous iommu_unmap() also benefits from this. Other > experiments, such as using kmem_cache for requests instead of kmalloc, > didn't show any improvement. > > Driver is available o...

...= __viommu_sync_req(viommu); >> + if (ret) >> + dev_dbg(viommu->dev, "could not sync requests (%d)\n", ret); >> + spin_unlock_irqrestore(&viommu->request_lock, flags); >> + >> + return ret; >> +} >> + >> +/* >> + * __viommu_add_request - Add one request to the queue >> + * @buf: pointer to the request buffer >> + * @len: length of the request buffer >> + * @writeback: copy data back to the buffer when the request completes. >> + * >> + * Add a request to the queue. Only synchronize the queue if i...

...>request_lock, flags); > + ret = __viommu_sync_req(viommu); > + if (ret) > + dev_dbg(viommu->dev, "could not sync requests (%d)\n", ret); > + spin_unlock_irqrestore(&viommu->request_lock, flags); > + > + return ret; > +} > + > +/* > + * __viommu_add_request - Add one request to the queue > + * @buf: pointer to the request buffer > + * @len: length of the request buffer > + * @writeback: copy data back to the buffer when the request completes. > + * > + * Add a request to the queue. Only synchronize the queue if it's already full...

...>request_lock, flags); > + ret = __viommu_sync_req(viommu); > + if (ret) > + dev_dbg(viommu->dev, "could not sync requests (%d)\n", ret); > + spin_unlock_irqrestore(&viommu->request_lock, flags); > + > + return ret; > +} > + > +/* > + * __viommu_add_request - Add one request to the queue > + * @buf: pointer to the request buffer > + * @len: length of the request buffer > + * @writeback: copy data back to the buffer when the request completes. > + * > + * Add a request to the queue. Only synchronize the queue if it's already full...

...to v0.7 of the spec, which changes resv_mem parameters and adds an MMIO flag. These are trivial but not backward compatible. Once device or driver is upstream, updates to the spec will rely on feature bits to stay compatible with this code. * Implement the new tlb_sync interface, by splitting add_req() and sync_req(). I noticed a small improvement on netperf stream because the synchronous iommu_unmap() also benefits from this. Other experiments, such as using kmem_cache for requests instead of kmalloc, didn't show any improvement. Driver is available on branch virtio-iommu/v0.7 [3]...

...to v0.7 of the spec, which changes resv_mem parameters and adds an MMIO flag. These are trivial but not backward compatible. Once device or driver is upstream, updates to the spec will rely on feature bits to stay compatible with this code. * Implement the new tlb_sync interface, by splitting add_req() and sync_req(). I noticed a small improvement on netperf stream because the synchronous iommu_unmap() also benefits from this. Other experiments, such as using kmem_cache for requests instead of kmalloc, didn't show any improvement. Driver is available on branch virtio-iommu/v0.7 [3]...

...>request_lock, flags); > + ret = __viommu_sync_req(viommu); > + if (ret) > + dev_dbg(viommu->dev, "could not sync requests (%d)\n", ret); > + spin_unlock_irqrestore(&viommu->request_lock, flags); > + > + return ret; > +} > + > +/* > + * __viommu_add_request - Add one request to the queue > + * @buf: pointer to the request buffer > + * @len: length of the request buffer > + * @writeback: copy data back to the buffer when the request completes. > + * > + * Add a request to the queue. Only synchronize the queue if it's already full...

...>request_lock, flags); > + ret = __viommu_sync_req(viommu); > + if (ret) > + dev_dbg(viommu->dev, "could not sync requests (%d)\n", ret); > + spin_unlock_irqrestore(&viommu->request_lock, flags); > + > + return ret; > +} > + > +/* > + * __viommu_add_request - Add one request to the queue > + * @buf: pointer to the request buffer > + * @len: length of the request buffer > + * @writeback: copy data back to the buffer when the request completes. > + * > + * Add a request to the queue. Only synchronize the queue if it's already full...

...ned long flags; + + spin_lock_irqsave(&viommu->request_lock, flags); + ret = __viommu_sync_req(viommu); + if (ret) + dev_dbg(viommu->dev, "could not sync requests (%d)\n", ret); + spin_unlock_irqrestore(&viommu->request_lock, flags); + + return ret; +} + +/* + * __viommu_add_request - Add one request to the queue + * @buf: pointer to the request buffer + * @len: length of the request buffer + * @writeback: copy data back to the buffer when the request completes. + * + * Add a request to the queue. Only synchronize the queue if it's already full. + * Otherwise don't...

...ned long flags; + + spin_lock_irqsave(&viommu->request_lock, flags); + ret = __viommu_sync_req(viommu); + if (ret) + dev_dbg(viommu->dev, "could not sync requests (%d)\n", ret); + spin_unlock_irqrestore(&viommu->request_lock, flags); + + return ret; +} + +/* + * __viommu_add_request - Add one request to the queue + * @buf: pointer to the request buffer + * @len: length of the request buffer + * @writeback: copy data back to the buffer when the request completes. + * + * Add a request to the queue. Only synchronize the queue if it's already full. + * Otherwise don't...

...ned long flags; + + spin_lock_irqsave(&viommu->request_lock, flags); + ret = __viommu_sync_req(viommu); + if (ret) + dev_dbg(viommu->dev, "could not sync requests (%d)\n", ret); + spin_unlock_irqrestore(&viommu->request_lock, flags); + + return ret; +} + +/* + * __viommu_add_request - Add one request to the queue + * @buf: pointer to the request buffer + * @len: length of the request buffer + * @writeback: copy data back to the buffer when the request completes. + * + * Add a request to the queue. Only synchronize the queue if it's already full. + * Otherwise don't...

...ned long flags; + + spin_lock_irqsave(&viommu->request_lock, flags); + ret = __viommu_sync_req(viommu); + if (ret) + dev_dbg(viommu->dev, "could not sync requests (%d)\n", ret); + spin_unlock_irqrestore(&viommu->request_lock, flags); + + return ret; +} + +/* + * __viommu_add_request - Add one request to the queue + * @buf: pointer to the request buffer + * @len: length of the request buffer + * @writeback: copy data back to the buffer when the request completes. + * + * Add a request to the queue. Only synchronize the queue if it's already full. + * Otherwise don't...

...ned long flags; + + spin_lock_irqsave(&viommu->request_lock, flags); + ret = __viommu_sync_req(viommu); + if (ret) + dev_dbg(viommu->dev, "could not sync requests (%d)\n", ret); + spin_unlock_irqrestore(&viommu->request_lock, flags); + + return ret; +} + +/* + * __viommu_add_request - Add one request to the queue + * @buf: pointer to the request buffer + * @len: length of the request buffer + * @writeback: copy data back to the buffer when the request completes. + * + * Add a request to the queue. Only synchronize the queue if it's already full. + * Otherwise don't...

...= __viommu_sync_req(viommu); >> + if (ret) >> + dev_dbg(viommu->dev, "could not sync requests (%d)\n", ret); >> + spin_unlock_irqrestore(&viommu->request_lock, flags); >> + >> + return ret; >> +} >> + >> +/* >> + * __viommu_add_request - Add one request to the queue >> + * @buf: pointer to the request buffer >> + * @len: length of the request buffer >> + * @writeback: copy data back to the buffer when the request completes. >> + * >> + * Add a request to the queue. Only synchronize the queue if i...

...>request_lock, flags); > + ret = __viommu_sync_req(viommu); > + if (ret) > + dev_dbg(viommu->dev, "could not sync requests (%d)\n", ret); > + spin_unlock_irqrestore(&viommu->request_lock, flags); > + > + return ret; > +} > + > +/* > + * __viommu_add_request - Add one request to the queue > + * @buf: pointer to the request buffer > + * @len: length of the request buffer > + * @writeback: copy data back to the buffer when the request completes. > + * > + * Add a request to the queue. Only synchronize the queue if it's already full...

...>request_lock, flags); > + ret = __viommu_sync_req(viommu); > + if (ret) > + dev_dbg(viommu->dev, "could not sync requests (%d)\n", ret); > + spin_unlock_irqrestore(&viommu->request_lock, flags); > + > + return ret; > +} > + > +/* > + * __viommu_add_request - Add one request to the queue > + * @buf: pointer to the request buffer > + * @len: length of the request buffer > + * @writeback: copy data back to the buffer when the request completes. > + * > + * Add a request to the queue. Only synchronize the queue if it's already full...

Implement the virtio-iommu driver, following specification v0.9 [1]. Since v4 [2] I fixed the issues reported by Eric, and added Reviewed-by from Eric and Rob. Thanks! I changed the specification to fix one inconsistency discussed in v4. That the device fills the probe buffer with zeroes is now a "SHOULD" instead of a "MAY", since it's the only way for the driver to know

Implement the virtio-iommu driver, following specification v0.9 [1]. Since v4 [2] I fixed the issues reported by Eric, and added Reviewed-by from Eric and Rob. Thanks! I changed the specification to fix one inconsistency discussed in v4. That the device fills the probe buffer with zeroes is now a "SHOULD" instead of a "MAY", since it's the only way for the driver to know

...>request_lock, flags); > + ret = __viommu_sync_req(viommu); > + if (ret) > + dev_dbg(viommu->dev, "could not sync requests (%d)\n", ret); > + spin_unlock_irqrestore(&viommu->request_lock, flags); > + > + return ret; > +} > + > +/* > + * __viommu_add_request - Add one request to the queue > + * @buf: pointer to the request buffer > + * @len: length of the request buffer > + * @writeback: copy data back to the buffer when the request completes. > + * > + * Add a request to the queue. Only synchronize the queue if it's already full...

...>request_lock, flags); > + ret = __viommu_sync_req(viommu); > + if (ret) > + dev_dbg(viommu->dev, "could not sync requests (%d)\n", ret); > + spin_unlock_irqrestore(&viommu->request_lock, flags); > + > + return ret; > +} > + > +/* > + * __viommu_add_request - Add one request to the queue > + * @buf: pointer to the request buffer > + * @len: length of the request buffer > + * @writeback: copy data back to the buffer when the request completes. > + * > + * Add a request to the queue. Only synchronize the queue if it's already full...