diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-12-20 08:37:04 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-12-20 08:37:05 -0800 |
commit | b7dfde956daee23f4439d0c8562a5e38b43e79d9 (patch) | |
tree | 2ed71fb5c5eac6957fd1e1ad0a67be6c3282167a /drivers/virtio | |
parent | 03c850ec327c42a97e44c448b75983e12da417d9 (diff) | |
parent | 1b6370463e88b0c1c317de16d7b962acc1dab4f2 (diff) | |
download | kernel_goldelico_gta04-b7dfde956daee23f4439d0c8562a5e38b43e79d9.zip kernel_goldelico_gta04-b7dfde956daee23f4439d0c8562a5e38b43e79d9.tar.gz kernel_goldelico_gta04-b7dfde956daee23f4439d0c8562a5e38b43e79d9.tar.bz2 |
Merge tag 'virtio-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux
Pull virtio update from Rusty Russell:
"Some nice cleanups, and even a patch my wife did as a "live" demo for
Latinoware 2012.
There's a slightly non-trivial merge in virtio-net, as we cleaned up
the virtio add_buf interface while DaveM accepted the mq virtio-net
patches."
* tag 'virtio-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux: (27 commits)
virtio_console: Add support for remoteproc serial
virtio_console: Merge struct buffer_token into struct port_buffer
virtio: add drv_to_virtio to make code clearly
virtio: use dev_to_virtio wrapper in virtio
virtio-mmio: Fix irq parsing in command line parameter
virtio_console: Free buffers from out-queue upon close
virtio: Convert dev_printk(KERN_<LEVEL> to dev_<level>(
virtio_console: Use kmalloc instead of kzalloc
virtio_console: Free buffer if splice fails
virtio: tools: make it clear that virtqueue_add_buf() no longer returns > 0
virtio: scsi: make it clear that virtqueue_add_buf() no longer returns > 0
virtio: rpmsg: make it clear that virtqueue_add_buf() no longer returns > 0
virtio: net: make it clear that virtqueue_add_buf() no longer returns > 0
virtio: console: make it clear that virtqueue_add_buf() no longer returns > 0
virtio: make virtqueue_add_buf() returning 0 on success, not capacity.
virtio: console: don't rely on virtqueue_add_buf() returning capacity.
virtio_net: don't rely on virtqueue_add_buf() returning capacity.
virtio-net: remove unused skb_vnet_hdr->num_sg field
virtio-net: correct capacity math on ring full
virtio: move queue_index and num_free fields into core struct virtqueue.
...
Diffstat (limited to 'drivers/virtio')
-rw-r--r-- | drivers/virtio/virtio.c | 30 | ||||
-rw-r--r-- | drivers/virtio/virtio_balloon.c | 7 | ||||
-rw-r--r-- | drivers/virtio/virtio_mmio.c | 30 | ||||
-rw-r--r-- | drivers/virtio/virtio_pci.c | 20 | ||||
-rw-r--r-- | drivers/virtio/virtio_ring.c | 46 |
5 files changed, 57 insertions, 76 deletions
diff --git a/drivers/virtio/virtio.c b/drivers/virtio/virtio.c index 809b0de..ee59b74 100644 --- a/drivers/virtio/virtio.c +++ b/drivers/virtio/virtio.c @@ -10,33 +10,32 @@ static DEFINE_IDA(virtio_index_ida); static ssize_t device_show(struct device *_d, struct device_attribute *attr, char *buf) { - struct virtio_device *dev = container_of(_d,struct virtio_device,dev); + struct virtio_device *dev = dev_to_virtio(_d); return sprintf(buf, "0x%04x\n", dev->id.device); } static ssize_t vendor_show(struct device *_d, struct device_attribute *attr, char *buf) { - struct virtio_device *dev = container_of(_d,struct virtio_device,dev); + struct virtio_device *dev = dev_to_virtio(_d); return sprintf(buf, "0x%04x\n", dev->id.vendor); } static ssize_t status_show(struct device *_d, struct device_attribute *attr, char *buf) { - struct virtio_device *dev = container_of(_d,struct virtio_device,dev); + struct virtio_device *dev = dev_to_virtio(_d); return sprintf(buf, "0x%08x\n", dev->config->get_status(dev)); } static ssize_t modalias_show(struct device *_d, struct device_attribute *attr, char *buf) { - struct virtio_device *dev = container_of(_d,struct virtio_device,dev); - + struct virtio_device *dev = dev_to_virtio(_d); return sprintf(buf, "virtio:d%08Xv%08X\n", dev->id.device, dev->id.vendor); } static ssize_t features_show(struct device *_d, struct device_attribute *attr, char *buf) { - struct virtio_device *dev = container_of(_d, struct virtio_device, dev); + struct virtio_device *dev = dev_to_virtio(_d); unsigned int i; ssize_t len = 0; @@ -71,10 +70,10 @@ static inline int virtio_id_match(const struct virtio_device *dev, static int virtio_dev_match(struct device *_dv, struct device_driver *_dr) { unsigned int i; - struct virtio_device *dev = container_of(_dv,struct virtio_device,dev); + struct virtio_device *dev = dev_to_virtio(_dv); const struct virtio_device_id *ids; - ids = container_of(_dr, struct virtio_driver, driver)->id_table; + ids = drv_to_virtio(_dr)->id_table; for (i = 0; ids[i].device; i++) if (virtio_id_match(dev, &ids[i])) return 1; @@ -83,7 +82,7 @@ static int virtio_dev_match(struct device *_dv, struct device_driver *_dr) static int virtio_uevent(struct device *_dv, struct kobj_uevent_env *env) { - struct virtio_device *dev = container_of(_dv,struct virtio_device,dev); + struct virtio_device *dev = dev_to_virtio(_dv); return add_uevent_var(env, "MODALIAS=virtio:d%08Xv%08X", dev->id.device, dev->id.vendor); @@ -98,8 +97,7 @@ void virtio_check_driver_offered_feature(const struct virtio_device *vdev, unsigned int fbit) { unsigned int i; - struct virtio_driver *drv = container_of(vdev->dev.driver, - struct virtio_driver, driver); + struct virtio_driver *drv = drv_to_virtio(vdev->dev.driver); for (i = 0; i < drv->feature_table_size; i++) if (drv->feature_table[i] == fbit) @@ -111,9 +109,8 @@ EXPORT_SYMBOL_GPL(virtio_check_driver_offered_feature); static int virtio_dev_probe(struct device *_d) { int err, i; - struct virtio_device *dev = container_of(_d,struct virtio_device,dev); - struct virtio_driver *drv = container_of(dev->dev.driver, - struct virtio_driver, driver); + struct virtio_device *dev = dev_to_virtio(_d); + struct virtio_driver *drv = drv_to_virtio(dev->dev.driver); u32 device_features; /* We have a driver! */ @@ -152,9 +149,8 @@ static int virtio_dev_probe(struct device *_d) static int virtio_dev_remove(struct device *_d) { - struct virtio_device *dev = container_of(_d,struct virtio_device,dev); - struct virtio_driver *drv = container_of(dev->dev.driver, - struct virtio_driver, driver); + struct virtio_device *dev = dev_to_virtio(_d); + struct virtio_driver *drv = drv_to_virtio(dev->dev.driver); drv->remove(dev); diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c index 2a70558..d19fe3e 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -139,10 +139,9 @@ static void fill_balloon(struct virtio_balloon *vb, size_t num) struct page *page = balloon_page_enqueue(vb_dev_info); if (!page) { - if (printk_ratelimit()) - dev_printk(KERN_INFO, &vb->vdev->dev, - "Out of puff! Can't get %u pages\n", - VIRTIO_BALLOON_PAGES_PER_PAGE); + dev_info_ratelimited(&vb->vdev->dev, + "Out of puff! Can't get %u pages\n", + VIRTIO_BALLOON_PAGES_PER_PAGE); /* Sleep for at least 1/5 of a second before retry. */ msleep(200); break; diff --git a/drivers/virtio/virtio_mmio.c b/drivers/virtio/virtio_mmio.c index 6b1b7e1..634f80b 100644 --- a/drivers/virtio/virtio_mmio.c +++ b/drivers/virtio/virtio_mmio.c @@ -225,7 +225,7 @@ static void vm_notify(struct virtqueue *vq) /* We write the queue's selector into the notification register to * signal the other end */ - writel(virtqueue_get_queue_index(vq), vm_dev->base + VIRTIO_MMIO_QUEUE_NOTIFY); + writel(vq->index, vm_dev->base + VIRTIO_MMIO_QUEUE_NOTIFY); } /* Notify all virtqueues on an interrupt. */ @@ -266,7 +266,7 @@ static void vm_del_vq(struct virtqueue *vq) struct virtio_mmio_device *vm_dev = to_virtio_mmio_device(vq->vdev); struct virtio_mmio_vq_info *info = vq->priv; unsigned long flags, size; - unsigned int index = virtqueue_get_queue_index(vq); + unsigned int index = vq->index; spin_lock_irqsave(&vm_dev->lock, flags); list_del(&info->node); @@ -521,25 +521,33 @@ static int vm_cmdline_set(const char *device, int err; struct resource resources[2] = {}; char *str; - long long int base; + long long int base, size; + unsigned int irq; int processed, consumed = 0; struct platform_device *pdev; - resources[0].flags = IORESOURCE_MEM; - resources[1].flags = IORESOURCE_IRQ; - - resources[0].end = memparse(device, &str) - 1; + /* Consume "size" part of the command line parameter */ + size = memparse(device, &str); + /* Get "@<base>:<irq>[:<id>]" chunks */ processed = sscanf(str, "@%lli:%u%n:%d%n", - &base, &resources[1].start, &consumed, + &base, &irq, &consumed, &vm_cmdline_id, &consumed); - if (processed < 2 || processed > 3 || str[consumed]) + /* + * sscanf() must processes at least 2 chunks; also there + * must be no extra characters after the last chunk, so + * str[consumed] must be '\0' + */ + if (processed < 2 || str[consumed]) return -EINVAL; + resources[0].flags = IORESOURCE_MEM; resources[0].start = base; - resources[0].end += base; - resources[1].end = resources[1].start; + resources[0].end = base + size - 1; + + resources[1].flags = IORESOURCE_IRQ; + resources[1].start = resources[1].end = irq; if (!vm_cmdline_parent_registered) { err = device_register(&vm_cmdline_parent); diff --git a/drivers/virtio/virtio_pci.c b/drivers/virtio/virtio_pci.c index c33aea3..e3ecc94 100644 --- a/drivers/virtio/virtio_pci.c +++ b/drivers/virtio/virtio_pci.c @@ -203,8 +203,7 @@ static void vp_notify(struct virtqueue *vq) /* we write the queue's selector into the notification register to * signal the other end */ - iowrite16(virtqueue_get_queue_index(vq), - vp_dev->ioaddr + VIRTIO_PCI_QUEUE_NOTIFY); + iowrite16(vq->index, vp_dev->ioaddr + VIRTIO_PCI_QUEUE_NOTIFY); } /* Handle a configuration change: Tell driver if it wants to know. */ @@ -479,8 +478,7 @@ static void vp_del_vq(struct virtqueue *vq) list_del(&info->node); spin_unlock_irqrestore(&vp_dev->lock, flags); - iowrite16(virtqueue_get_queue_index(vq), - vp_dev->ioaddr + VIRTIO_PCI_QUEUE_SEL); + iowrite16(vq->index, vp_dev->ioaddr + VIRTIO_PCI_QUEUE_SEL); if (vp_dev->msix_enabled) { iowrite16(VIRTIO_MSI_NO_VECTOR, @@ -830,16 +828,4 @@ static struct pci_driver virtio_pci_driver = { #endif }; -static int __init virtio_pci_init(void) -{ - return pci_register_driver(&virtio_pci_driver); -} - -module_init(virtio_pci_init); - -static void __exit virtio_pci_exit(void) -{ - pci_unregister_driver(&virtio_pci_driver); -} - -module_exit(virtio_pci_exit); +module_pci_driver(virtio_pci_driver); diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index e639584..ffd7e7d 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -93,8 +93,6 @@ struct vring_virtqueue /* Host publishes avail event idx */ bool event; - /* Number of free buffers */ - unsigned int num_free; /* Head of free buffer list. */ unsigned int free_head; /* Number we've added since last sync. */ @@ -106,9 +104,6 @@ struct vring_virtqueue /* How to notify other side. FIXME: commonalize hcalls! */ void (*notify)(struct virtqueue *vq); - /* Index of the queue */ - int queue_index; - #ifdef DEBUG /* They're supposed to lock for us. */ unsigned int in_use; @@ -135,6 +130,13 @@ static int vring_add_indirect(struct vring_virtqueue *vq, unsigned head; int i; + /* + * We require lowmem mappings for the descriptors because + * otherwise virt_to_phys will give us bogus addresses in the + * virtqueue. + */ + gfp &= ~(__GFP_HIGHMEM | __GFP_HIGH); + desc = kmalloc((out + in) * sizeof(struct vring_desc), gfp); if (!desc) return -ENOMEM; @@ -160,7 +162,7 @@ static int vring_add_indirect(struct vring_virtqueue *vq, desc[i-1].next = 0; /* We're about to use a buffer */ - vq->num_free--; + vq->vq.num_free--; /* Use a single buffer which doesn't continue */ head = vq->free_head; @@ -174,13 +176,6 @@ static int vring_add_indirect(struct vring_virtqueue *vq, return head; } -int virtqueue_get_queue_index(struct virtqueue *_vq) -{ - struct vring_virtqueue *vq = to_vvq(_vq); - return vq->queue_index; -} -EXPORT_SYMBOL_GPL(virtqueue_get_queue_index); - /** * virtqueue_add_buf - expose buffer to other end * @vq: the struct virtqueue we're talking about. @@ -193,10 +188,7 @@ EXPORT_SYMBOL_GPL(virtqueue_get_queue_index); * Caller must ensure we don't call this with other virtqueue operations * at the same time (except where noted). * - * Returns remaining capacity of queue or a negative error - * (ie. ENOSPC). Note that it only really makes sense to treat all - * positive return values as "available": indirect buffers mean that - * we can put an entire sg[] array inside a single queue entry. + * Returns zero or a negative error (ie. ENOSPC, ENOMEM). */ int virtqueue_add_buf(struct virtqueue *_vq, struct scatterlist sg[], @@ -228,7 +220,7 @@ int virtqueue_add_buf(struct virtqueue *_vq, /* If the host supports indirect descriptor tables, and we have multiple * buffers, then go indirect. FIXME: tune this threshold */ - if (vq->indirect && (out + in) > 1 && vq->num_free) { + if (vq->indirect && (out + in) > 1 && vq->vq.num_free) { head = vring_add_indirect(vq, sg, out, in, gfp); if (likely(head >= 0)) goto add_head; @@ -237,9 +229,9 @@ int virtqueue_add_buf(struct virtqueue *_vq, BUG_ON(out + in > vq->vring.num); BUG_ON(out + in == 0); - if (vq->num_free < out + in) { + if (vq->vq.num_free < out + in) { pr_debug("Can't add buf len %i - avail = %i\n", - out + in, vq->num_free); + out + in, vq->vq.num_free); /* FIXME: for historical reasons, we force a notify here if * there are outgoing parts to the buffer. Presumably the * host should service the ring ASAP. */ @@ -250,7 +242,7 @@ int virtqueue_add_buf(struct virtqueue *_vq, } /* We're about to use some buffers from the free list. */ - vq->num_free -= out + in; + vq->vq.num_free -= out + in; head = vq->free_head; for (i = vq->free_head; out; i = vq->vring.desc[i].next, out--) { @@ -296,7 +288,7 @@ add_head: pr_debug("Added buffer head %i to %p\n", head, vq); END_USE(vq); - return vq->num_free; + return 0; } EXPORT_SYMBOL_GPL(virtqueue_add_buf); @@ -393,13 +385,13 @@ static void detach_buf(struct vring_virtqueue *vq, unsigned int head) while (vq->vring.desc[i].flags & VRING_DESC_F_NEXT) { i = vq->vring.desc[i].next; - vq->num_free++; + vq->vq.num_free++; } vq->vring.desc[i].next = vq->free_head; vq->free_head = head; /* Plus final descriptor */ - vq->num_free++; + vq->vq.num_free++; } static inline bool more_used(const struct vring_virtqueue *vq) @@ -599,7 +591,7 @@ void *virtqueue_detach_unused_buf(struct virtqueue *_vq) return buf; } /* That should have freed everything. */ - BUG_ON(vq->num_free != vq->vring.num); + BUG_ON(vq->vq.num_free != vq->vring.num); END_USE(vq); return NULL; @@ -653,12 +645,13 @@ struct virtqueue *vring_new_virtqueue(unsigned int index, vq->vq.callback = callback; vq->vq.vdev = vdev; vq->vq.name = name; + vq->vq.num_free = num; + vq->vq.index = index; vq->notify = notify; vq->weak_barriers = weak_barriers; vq->broken = false; vq->last_used_idx = 0; vq->num_added = 0; - vq->queue_index = index; list_add_tail(&vq->vq.list, &vdev->vqs); #ifdef DEBUG vq->in_use = false; @@ -673,7 +666,6 @@ struct virtqueue *vring_new_virtqueue(unsigned int index, vq->vring.avail->flags |= VRING_AVAIL_F_NO_INTERRUPT; /* Put everything in free lists. */ - vq->num_free = num; vq->free_head = 0; for (i = 0; i < num-1; i++) { vq->vring.desc[i].next = i+1; |