search for: get_order

...vmbus_channel *newchannel, u32 send_ringbuffer_size, newchannel->channel_callback_context = context; /* Allocate the ring buffer */ - out = osd_page_alloc((send_ringbuffer_size + recv_ringbuffer_size) - >> PAGE_SHIFT); + out = (void *)__get_free_pages(GFP_KERNEL|__GFP_ZERO, + get_order(send_ringbuffer_size + recv_ringbuffer_size)); + if (!out) return -ENOMEM; @@ -300,8 +301,8 @@ Cleanup: errorout: ringbuffer_cleanup(&newchannel->outbound); ringbuffer_cleanup(&newchannel->inbound); - osd_page_free(out, (send_ringbuffer_size + recv_ringbuffer_size) -...

...vmbus_channel *newchannel, u32 send_ringbuffer_size, newchannel->channel_callback_context = context; /* Allocate the ring buffer */ - out = osd_page_alloc((send_ringbuffer_size + recv_ringbuffer_size) - >> PAGE_SHIFT); + out = (void *)__get_free_pages(GFP_KERNEL|__GFP_ZERO, + get_order(send_ringbuffer_size + recv_ringbuffer_size)); + if (!out) return -ENOMEM; @@ -300,8 +301,8 @@ Cleanup: errorout: ringbuffer_cleanup(&newchannel->outbound); ringbuffer_cleanup(&newchannel->inbound); - osd_page_free(out, (send_ringbuffer_size + recv_ringbuffer_size) -...

...9 @@ static void mic_notify(struct virtqueue *vq) static void mic_del_vq(struct virtqueue *vq, int n) { struct mic_vdev *mvdev = to_micvdev(vq->vdev); - struct vring *vr = (struct vring *) (vq + 1); + struct vring *vr = (struct vring *)(vq + 1); - free_pages((unsigned long) vr->used, - get_order(mvdev->used_size[n])); + free_pages((unsigned long) vr->used, get_order(mvdev->used_size[n])); vring_del_virtqueue(vq); mic_card_unmap(mvdev->mdev, mvdev->vr[n]); mvdev->vr[n] = NULL; @@ -274,8 +273,8 @@ static struct virtqueue *mic_find_vq(struct virtio_device *vdev, /* A...

...- if (!ret) - return NULL; + if (attrs & DMA_ATTR_NO_WARN) + gfp |= __GFP_NOWARN; - *dma_handle = vdma_alloc(virt_to_phys(ret), size); - if (*dma_handle == DMA_MAPPING_ERROR) { - dma_direct_free_pages(dev, size, ret, *dma_handle, attrs); + size = PAGE_ALIGN(size); + page = alloc_pages(gfp, get_order(size)); + if (!page) return NULL; - } + ret = page_address(page); + *dma_handle = vdma_alloc(virt_to_phys(ret), size); + if (*dma_handle == DMA_MAPPING_ERROR) + goto out_free_pages; + + if (attrs & DMA_ATTR_NON_CONSISTENT) + return ret; + arch_dma_prep_coherent(page, size); + return (void...

I have several orders that are being updated in an internal data entry app. I start by going from an order to pop-up form that allows a user to select items to add to a field in the order. The pop-up form contains 2 partials for drag and drop functionality from AWD. The user starts by selecting a category in a drop down list. Then on select, the first partial is filled with the list of

...v, unsigned index, info->queue_index = index; info->num = num; - /* determine the memory needed for the queue and provide the memory - * location to the host */ - info->n_pages = DIV_ROUND_UP(vring_size(num), PAGE_SIZE); - info->pages = alloc_pages(GFP_KERNEL | __GFP_ZERO, - get_order(info->n_pages)); - if (info->pages == NULL) { - err = -ENOMEM; - goto out_info; - } - - /* FIXME: is this sufficient for info->n_pages > 1? */ - info->queue = kmap(info->pages); + info->queue = kmalloc(vring_size(num), GFP_KERNEL | __GFP_ZERO); if (info->queue == NULL) {...

...v, unsigned index, info->queue_index = index; info->num = num; - /* determine the memory needed for the queue and provide the memory - * location to the host */ - info->n_pages = DIV_ROUND_UP(vring_size(num), PAGE_SIZE); - info->pages = alloc_pages(GFP_KERNEL | __GFP_ZERO, - get_order(info->n_pages)); - if (info->pages == NULL) { - err = -ENOMEM; - goto out_info; - } - - /* FIXME: is this sufficient for info->n_pages > 1? */ - info->queue = kmap(info->pages); + info->queue = kmalloc(vring_size(num), GFP_KERNEL | __GFP_ZERO); if (info->queue == NULL) {...

On Fri, Oct 30, 2015 at 02:20:35PM +0100, Christian Borntraeger wrote: > +static void *dma_noop_alloc(struct device *dev, size_t size, > + dma_addr_t *dma_handle, gfp_t gfp, > + struct dma_attrs *attrs) > +{ > + void *ret; > + > + ret = (void *)__get_free_pages(gfp, get_order(size)); > + if (ret) { > + memset(ret, 0, size); There is no need to zero out the memory here. If the user wants initialized memory it can call dma_zalloc_coherent. Having the memset here means to clear the memory twice in the dma_zalloc_coherent path. Otherwise it looks good. Joerg

...t(vdev->dev.parent, size, > dma_handle, flag); > } else { > - void *queue = alloc_pages_exact(PAGE_ALIGN(size), flag); > - > - if (queue) { > + void *queue = NULL; > + struct page *page = alloc_pages_node(dev_to_node(vdev->dev.parent), > + flag, get_order(size)); > + if (page) { > + queue = page_address(page); > phys_addr_t phys_addr = virt_to_phys(queue); > *dma_handle = (dma_addr_t)phys_addr; > > @@ -308,7 +310,7 @@ static void vring_free_queue(struct virtio_device *vdev, size_t size, > if (vring_use_dma_api(vde...

On Fri, Oct 30, 2015 at 02:20:35PM +0100, Christian Borntraeger wrote: > +static void *dma_noop_alloc(struct device *dev, size_t size, > + dma_addr_t *dma_handle, gfp_t gfp, > + struct dma_attrs *attrs) > +{ > + void *ret; > + > + ret = (void *)__get_free_pages(gfp, get_order(size)); > + if (ret) { > + memset(ret, 0, size); There is no need to zero out the memory here. If the user wants initialized memory it can call dma_zalloc_coherent. Having the memset here means to clear the memory twice in the dma_zalloc_coherent path. Otherwise it looks good. Joerg

...-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0) -void *pci_alloc_consistent(struct pci_dev *hwdev, size_t size, - dma_addr_t *dma_handle) -#else void *dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, int gfp) -#endif { void *ret; unsigned int order = get_order(size); unsigned long vstart; -#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0) - int gfp = GFP_ATOMIC; - - if (hwdev == NULL || ((u32)hwdev->dma_mask < 0xffffffff)) - gfp |= GFP_DMA; -#else struct dma_coherent_mem *mem = dev ? dev->dma_mem : NULL; /* ignore region specifiers */...

...#include <linux/mm.h> +#include <linux/dma-mapping.h> +#include <linux/scatterlist.h> + +static void *dma_noop_alloc(struct device *dev, size_t size, + dma_addr_t *dma_handle, gfp_t gfp, + struct dma_attrs *attrs) +{ + void *ret; + + ret = (void *)__get_free_pages(gfp, get_order(size)); + if (ret) + *dma_handle = virt_to_phys(ret); + return ret; +} + +static void dma_noop_free(struct device *dev, size_t size, + void *cpu_addr, dma_addr_t dma_addr, + struct dma_attrs *attrs) +{ + free_pages((unsigned long)cpu_addr, get_order(size)); +} + +static dma_addr_t dma_noop...

...#include <linux/mm.h> +#include <linux/dma-mapping.h> +#include <linux/scatterlist.h> + +static void *dma_noop_alloc(struct device *dev, size_t size, + dma_addr_t *dma_handle, gfp_t gfp, + struct dma_attrs *attrs) +{ + void *ret; + + ret = (void *)__get_free_pages(gfp, get_order(size)); + if (ret) { + memset(ret, 0, size); + *dma_handle = virt_to_phys(ret); + } + return ret; +} + +static void dma_noop_free(struct device *dev, size_t size, + void *cpu_addr, dma_addr_t dma_addr, + struct dma_attrs *attrs) +{ + free_pages((unsigned long)cpu_addr, get_order(size)); +...

...#include <linux/mm.h> +#include <linux/dma-mapping.h> +#include <linux/scatterlist.h> + +static void *dma_noop_alloc(struct device *dev, size_t size, + dma_addr_t *dma_handle, gfp_t gfp, + struct dma_attrs *attrs) +{ + void *ret; + + ret = (void *)__get_free_pages(gfp, get_order(size)); + if (ret) + *dma_handle = virt_to_phys(ret); + return ret; +} + +static void dma_noop_free(struct device *dev, size_t size, + void *cpu_addr, dma_addr_t dma_addr, + struct dma_attrs *attrs) +{ + free_pages((unsigned long)cpu_addr, get_order(size)); +} + +static dma_addr_t dma_noop...

...644 --- a/drivers/xen/swiotlb-xen.c +++ b/drivers/xen/swiotlb-xen.c @@ -294,7 +294,7 @@ error: void * xen_swiotlb_alloc_coherent(struct device *hwdev, size_t size, dma_addr_t *dma_handle, gfp_t flags, - struct dma_attrs *attrs) + unsigned long attrs) { void *ret; int order = get_order(size); @@ -346,7 +346,7 @@ EXPORT_SYMBOL_GPL(xen_swiotlb_alloc_coherent); void xen_swiotlb_free_coherent(struct device *hwdev, size_t size, void *vaddr, - dma_addr_t dev_addr, struct dma_attrs *attrs) + dma_addr_t dev_addr, unsigned long attrs) { int order = get_order(size); phys_a...

here is the 2nd version of providing an DMA API for s390. There are some attempts to unify the dma ops (Christoph) as well as some attempts to make virtio use the dma API (Andy). At kernel summit we concluded that we want to use the same code on all platforms, whereever possible, so having a dummy dma_op might be the easiest solution to keep virtio-ccw as similar as possible to

here is the 2nd version of providing an DMA API for s390. There are some attempts to unify the dma ops (Christoph) as well as some attempts to make virtio use the dma API (Andy). At kernel summit we concluded that we want to use the same code on all platforms, whereever possible, so having a dummy dma_op might be the easiest solution to keep virtio-ccw as similar as possible to

...t(struct device *dev, size_t size, @@ -3617,9 +3589,6 @@ static void *intel_alloc_coherent(struct device *dev, size_t size, struct page *page = NULL; int order; - if (iommu_no_mapping(dev)) - return dma_direct_alloc(dev, size, dma_handle, flags, attrs); - size = PAGE_ALIGN(size); order = get_order(size); @@ -3653,9 +3622,6 @@ static void intel_free_coherent(struct device *dev, size_t size, void *vaddr, int order; struct page *page = virt_to_page(vaddr); - if (iommu_no_mapping(dev)) - return dma_direct_free(dev, size, vaddr, dma_handle, attrs); - size = PAGE_ALIGN(size); order =...

...rr(&net_device->dev->device, - "unable to teardown send buffer's gpadl"); - return -1; - } - net_device->send_buf_gpadl_handle = 0; - } - - if (net_device->send_buf) { - /* Free up the receive buffer */ - free_pages((unsigned long)net_device->send_buf, - get_order(net_device->send_buf_size)); - net_device->send_buf = NULL; - } - - return ret; -} - -static int netvsc_init_send_buf(struct hv_device *device) -{ - int ret = 0; - int t; - struct netvsc_device *net_device; - struct nvsp_message *init_packet; - - net_device = get_outbound_net_device(device);...

...rr(&net_device->dev->device, - "unable to teardown send buffer's gpadl"); - return -1; - } - net_device->send_buf_gpadl_handle = 0; - } - - if (net_device->send_buf) { - /* Free up the receive buffer */ - free_pages((unsigned long)net_device->send_buf, - get_order(net_device->send_buf_size)); - net_device->send_buf = NULL; - } - - return ret; -} - -static int netvsc_init_send_buf(struct hv_device *device) -{ - int ret = 0; - int t; - struct netvsc_device *net_device; - struct nvsp_message *init_packet; - - net_device = get_outbound_net_device(device);...