search for: sg_len

...truct virtio_balloon *vb, > > > + struct virtqueue *vq, > > > + unsigned long page_xb_start, > > > + unsigned long page_xb_end) > > > +{ > > > + unsigned long sg_pfn_start, sg_pfn_end; > > > + void *sg_addr; > > > + uint32_t sg_len, sg_max_len = round_down(UINT_MAX, PAGE_SIZE); > > > + > > > + sg_pfn_start = page_xb_start; > > > + while (sg_pfn_start < page_xb_end) { > > > + sg_pfn_start = xb_find_next_bit(&vb->page_xb, sg_pfn_start, > > > + page_xb_end, 1); > &g...

...truct virtio_balloon *vb, > > > + struct virtqueue *vq, > > > + unsigned long page_xb_start, > > > + unsigned long page_xb_end) > > > +{ > > > + unsigned long sg_pfn_start, sg_pfn_end; > > > + void *sg_addr; > > > + uint32_t sg_len, sg_max_len = round_down(UINT_MAX, PAGE_SIZE); > > > + > > > + sg_pfn_start = page_xb_start; > > > + while (sg_pfn_start < page_xb_end) { > > > + sg_pfn_start = xb_find_next_bit(&vb->page_xb, sg_pfn_start, > > > + page_xb_end, 1); > &g...

...eue *vq, > > > > > + unsigned long page_xb_start, > > > > > + unsigned long page_xb_end) > > > > > +{ > > > > > + unsigned long sg_pfn_start, sg_pfn_end; > > > > > + void *sg_addr; > > > > > + uint32_t sg_len, sg_max_len = round_down(UINT_MAX, PAGE_SIZE); > > > > > + > > > > > + sg_pfn_start = page_xb_start; > > > > > + while (sg_pfn_start < page_xb_end) { > > > > > + sg_pfn_start = xb_find_next_bit(&vb->page_xb, sg_pfn_start, > &...

...eue *vq, > > > > > + unsigned long page_xb_start, > > > > > + unsigned long page_xb_end) > > > > > +{ > > > > > + unsigned long sg_pfn_start, sg_pfn_end; > > > > > + void *sg_addr; > > > > > + uint32_t sg_len, sg_max_len = round_down(UINT_MAX, PAGE_SIZE); > > > > > + > > > > > + sg_pfn_start = page_xb_start; > > > > > + while (sg_pfn_start < page_xb_end) { > > > > > + sg_pfn_start = xb_find_next_bit(&vb->page_xb, sg_pfn_start, > &...

...alloon *vb, >>>> + struct virtqueue *vq, >>>> + unsigned long page_xb_start, >>>> + unsigned long page_xb_end) >>>> +{ >>>> + unsigned long sg_pfn_start, sg_pfn_end; >>>> + void *sg_addr; >>>> + uint32_t sg_len, sg_max_len = round_down(UINT_MAX, PAGE_SIZE); >>>> + >>>> + sg_pfn_start = page_xb_start; >>>> + while (sg_pfn_start < page_xb_end) { >>>> + sg_pfn_start = xb_find_next_bit(&vb->page_xb, sg_pfn_start, >>>> + page_xb_end, 1...

...fdesc = to_st_fdma_desc(vdesc); + for (i = 0; i < fdesc->n_nodes; i++) + dma_pool_free(fdesc->fchan->node_pool, fdesc->node[i].desc, + fdesc->node[i].pdesc); + kfree(fdesc); +} + +static struct st_fdma_desc *st_fdma_alloc_desc(struct st_fdma_chan *fchan, + int sg_len) +{ + struct st_fdma_desc *fdesc; + int i; + + fdesc = kzalloc(sizeof(*fdesc) + + sizeof(struct st_fdma_sw_node) * sg_len, GFP_NOWAIT); + if (!fdesc) + return NULL; + + fdesc->fchan = fchan; + fdesc->n_nodes = sg_len; + for (i = 0; i < sg_len; i++) { + fdesc->node[i].desc = dma_pool...

...hile (!virtqueue_get_buf(vq, &len) && + !virtqueue_is_broken(vq)) + cpu_relax(); + else + wait_event(vb->acked, virtqueue_get_buf(vq, &len)); } /* @@ -197,11 +210,11 @@ static void tell_host_sgs(struct virtio_balloon *vb, sg_addr = pfn_to_kaddr(sg_pfn_start); sg_len = (sg_pfn_end - sg_pfn_start) << PAGE_SHIFT; while (sg_len > sg_max_len) { - send_one_sg(vb, vq, sg_addr, sg_max_len); + send_one_sg(vb, vq, sg_addr, sg_max_len, 0); sg_addr += sg_max_len; sg_len -= sg_max_len; } - send_one_sg(vb, vq, sg_addr, sg_len); + send_one_sg(vb,...

This patch series enhances the existing virtio-balloon with the following new features: 1) fast ballooning: transfer ballooned pages between the guest and host in chunks using sgs, instead of one by one; and 2) free_page_vq: a new virtqueue to report guest free pages to the host. The second feature can be used to accelerate live migration of VMs. Here are some details: Live migration needs to

This patch series enhances the existing virtio-balloon with the following new features: 1) fast ballooning: transfer ballooned pages between the guest and host in chunks using sgs, instead of one by one; and 2) free_page_vq: a new virtqueue to report guest free pages to the host. The second feature can be used to accelerate live migration of VMs. Here are some details: Live migration needs to

...end form the range of bits in the xbitmap that + * need to be searched. + */ +static void tell_host_sgs(struct virtio_balloon *vb, + struct virtqueue *vq, + unsigned long page_xb_start, + unsigned long page_xb_end) +{ + unsigned long sg_pfn_start, sg_pfn_end; + void *sg_addr; + uint32_t sg_len, sg_max_len = round_down(UINT_MAX, PAGE_SIZE); + + sg_pfn_start = page_xb_start; + while (sg_pfn_start < page_xb_end) { + sg_pfn_start = xb_find_next_bit(&vb->page_xb, sg_pfn_start, + page_xb_end, 1); + if (sg_pfn_start == page_xb_end + 1) + break; + sg_pfn_end = xb_find_next_bi...

...cpu_relax(); > + else > + wait_event(vb->acked, virtqueue_get_buf(vq, &len)); > } > > /* > @@ -197,11 +210,11 @@ static void tell_host_sgs(struct virtio_balloon *vb, > sg_addr = pfn_to_kaddr(sg_pfn_start); > sg_len = (sg_pfn_end - sg_pfn_start) << PAGE_SHIFT; > while (sg_len > sg_max_len) { > - send_one_sg(vb, vq, sg_addr, sg_max_len); > + send_one_sg(vb, vq, sg_addr, sg_max_len, 0); > sg_addr += sg_ma...

...cpu_relax(); > + else > + wait_event(vb->acked, virtqueue_get_buf(vq, &len)); > } > > /* > @@ -197,11 +210,11 @@ static void tell_host_sgs(struct virtio_balloon *vb, > sg_addr = pfn_to_kaddr(sg_pfn_start); > sg_len = (sg_pfn_end - sg_pfn_start) << PAGE_SHIFT; > while (sg_len > sg_max_len) { > - send_one_sg(vb, vq, sg_addr, sg_max_len); > + send_one_sg(vb, vq, sg_addr, sg_max_len, 0); > sg_addr += sg_ma...

...end form the range of bits in the xbitmap that + * need to be searched. + */ +static void tell_host_sgs(struct virtio_balloon *vb, + struct virtqueue *vq, + unsigned long page_xb_start, + unsigned long page_xb_end) +{ + unsigned long sg_pfn_start, sg_pfn_end; + void *sg_addr; + uint32_t sg_len, sg_max_len = round_down(UINT_MAX, PAGE_SIZE); + int err = 0; + + sg_pfn_start = page_xb_start; + while (sg_pfn_start < page_xb_end) { + sg_pfn_start = xb_find_next_set_bit(&vb->page_xb, sg_pfn_start, + page_xb_end); + if (sg_pfn_start == page_xb_end + 1) + break; + sg_pfn_e...

...end form the range of bits in the xbitmap that + * need to be searched. + */ +static void tell_host_sgs(struct virtio_balloon *vb, + struct virtqueue *vq, + unsigned long page_xb_start, + unsigned long page_xb_end) +{ + unsigned long sg_pfn_start, sg_pfn_end; + void *sg_addr; + uint32_t sg_len, sg_max_len = round_down(UINT_MAX, PAGE_SIZE); + + sg_pfn_start = page_xb_start; + while (sg_pfn_start < page_xb_end) { + sg_pfn_start = xb_find_next_set_bit(&vb->page_xb, sg_pfn_start, + page_xb_end); + if (sg_pfn_start == page_xb_end + 1) + break; + sg_pfn_end = xb_find_ne...

...; + * need to be searched. > + */ > +static void tell_host_sgs(struct virtio_balloon *vb, > + struct virtqueue *vq, > + unsigned long page_xb_start, > + unsigned long page_xb_end) > +{ > + unsigned long sg_pfn_start, sg_pfn_end; > + void *sg_addr; > + uint32_t sg_len, sg_max_len = round_down(UINT_MAX, PAGE_SIZE); > + int err = 0; > + > + sg_pfn_start = page_xb_start; > + while (sg_pfn_start < page_xb_end) { > + sg_pfn_start = xb_find_next_set_bit(&vb->page_xb, sg_pfn_start, > + page_xb_end); > + if (sg_pfn_start == page...

...; + * need to be searched. > + */ > +static void tell_host_sgs(struct virtio_balloon *vb, > + struct virtqueue *vq, > + unsigned long page_xb_start, > + unsigned long page_xb_end) > +{ > + unsigned long sg_pfn_start, sg_pfn_end; > + void *sg_addr; > + uint32_t sg_len, sg_max_len = round_down(UINT_MAX, PAGE_SIZE); > + int err = 0; > + > + sg_pfn_start = page_xb_start; > + while (sg_pfn_start < page_xb_end) { > + sg_pfn_start = xb_find_next_set_bit(&vb->page_xb, sg_pfn_start, > + page_xb_end); > + if (sg_pfn_start == page...

...; + * need to be searched. > + */ > +static void tell_host_sgs(struct virtio_balloon *vb, > + struct virtqueue *vq, > + unsigned long page_xb_start, > + unsigned long page_xb_end) > +{ > + unsigned long sg_pfn_start, sg_pfn_end; > + void *sg_addr; > + uint32_t sg_len, sg_max_len = round_down(UINT_MAX, PAGE_SIZE); > + > + sg_pfn_start = page_xb_start; > + while (sg_pfn_start < page_xb_end) { > + sg_pfn_start = xb_find_next_bit(&vb->page_xb, sg_pfn_start, > + page_xb_end, 1); > + if (sg_pfn_start == page_xb_end + 1) > + bre...

...; + * need to be searched. > + */ > +static void tell_host_sgs(struct virtio_balloon *vb, > + struct virtqueue *vq, > + unsigned long page_xb_start, > + unsigned long page_xb_end) > +{ > + unsigned long sg_pfn_start, sg_pfn_end; > + void *sg_addr; > + uint32_t sg_len, sg_max_len = round_down(UINT_MAX, PAGE_SIZE); > + > + sg_pfn_start = page_xb_start; > + while (sg_pfn_start < page_xb_end) { > + sg_pfn_start = xb_find_next_bit(&vb->page_xb, sg_pfn_start, > + page_xb_end, 1); > + if (sg_pfn_start == page_xb_end + 1) > + bre...

Hi Vinod, Bjorn, Patrice, This patchset adds support for the Flexible Direct Memory Access (FDMA) core found on STi chipsets from STMicroelectronics. The FDMA is a slim core CPU with a dedicated firmware. It is a general purpose DMA controller supporting 16 independent channels and data can be moved from memory to memory or between memory and paced latency critical real time targets. After quite

Hi Vinod, Bjorn, Patrice, This patchset adds support for the Flexible Direct Memory Access (FDMA) core found on STi chipsets from STMicroelectronics. The FDMA is a slim core CPU with a dedicated firmware. It is a general purpose DMA controller supporting 16 independent channels and data can be moved from memory to memory or between memory and paced latency critical real time targets. After quite