#ifndef _ASM_ARM_XEN_PAGE_COHERENT_H
#define _ASM_ARM_XEN_PAGE_COHERENT_H

#include <asm/page.h>
#include <linux/dma-mapping.h>

void __xen_dma_map_page(struct device *hwdev, struct page *page,
	     dma_addr_t dev_addr, unsigned long offset, size_t size,
	     enum dma_data_direction dir, unsigned long attrs);
void __xen_dma_unmap_page(struct device *hwdev, dma_addr_t handle,
		size_t size, enum dma_data_direction dir,
		unsigned long attrs);
void __xen_dma_sync_single_for_cpu(struct device *hwdev,
		dma_addr_t handle, size_t size, enum dma_data_direction dir);

void __xen_dma_sync_single_for_device(struct device *hwdev,
		dma_addr_t handle, size_t size, enum dma_data_direction dir);

static inline void *xen_alloc_coherent_pages(struct device *hwdev, size_t size,
		dma_addr_t *dma_handle, gfp_t flags, unsigned long attrs)
{
	return __generic_dma_ops(hwdev)->alloc(hwdev, size, dma_handle, flags, attrs);
}

static inline void xen_free_coherent_pages(struct device *hwdev, size_t size,
		void *cpu_addr, dma_addr_t dma_handle, unsigned long attrs)
{
	__generic_dma_ops(hwdev)->free(hwdev, size, cpu_addr, dma_handle, attrs);
}

static inline void xen_dma_map_page(struct device *hwdev, struct page *page,
	     dma_addr_t dev_addr, unsigned long offset, size_t size,
	     enum dma_data_direction dir, unsigned long attrs)
{
	unsigned long page_pfn = page_to_xen_pfn(page);
	unsigned long dev_pfn = XEN_PFN_DOWN(dev_addr);
	unsigned long compound_pages =
		(1<<compound_order(page)) * XEN_PFN_PER_PAGE;
	bool local = (page_pfn <= dev_pfn) &&
		(dev_pfn - page_pfn < compound_pages);

	/*
	 * Dom0 is mapped 1:1, while the Linux page can span across
	 * multiple Xen pages, it's not possible for it to contain a
	 * mix of local and foreign Xen pages. So if the first xen_pfn
	 * == mfn the page is local otherwise it's a foreign page
	 * grant-mapped in dom0. If the page is local we can safely
	 * call the native dma_ops function, otherwise we call the xen
	 * specific function.
	 */
	if (local)
		__generic_dma_ops(hwdev)->map_page(hwdev, page, offset, size, dir, attrs);
	else
		__xen_dma_map_page(hwdev, page, dev_addr, offset, size, dir, attrs);
}

static inline void xen_dma_unmap_page(struct device *hwdev, dma_addr_t handle,
		size_t size, enum dma_data_direction dir, unsigned long attrs)
{
	unsigned long pfn = PFN_DOWN(handle);
	/*
	 * Dom0 is mapped 1:1, while the Linux page can be spanned accross
	 * multiple Xen page, it's not possible to have a mix of local and
	 * foreign Xen page. Dom0 is mapped 1:1, so calling pfn_valid on a
	 * foreign mfn will always return false. If the page is local we can
	 * safely call the native dma_ops function, otherwise we call the xen
	 * specific function.
	 */
	if (pfn_valid(pfn)) {
		if (__generic_dma_ops(hwdev)->unmap_page)
			__generic_dma_ops(hwdev)->unmap_page(hwdev, handle, size, dir, attrs);
	} else
		__xen_dma_unmap_page(hwdev, handle, size, dir, attrs);
}

static inline void xen_dma_sync_single_for_cpu(struct device *hwdev,
		dma_addr_t handle, size_t size, enum dma_data_direction dir)
{
	unsigned long pfn = PFN_DOWN(handle);
	if (pfn_valid(pfn)) {
		if (__generic_dma_ops(hwdev)->sync_single_for_cpu)
			__generic_dma_ops(hwdev)->sync_single_for_cpu(hwdev, handle, size, dir);
	} else
		__xen_dma_sync_single_for_cpu(hwdev, handle, size, dir);
}

static inline void xen_dma_sync_single_for_device(struct device *hwdev,
		dma_addr_t handle, size_t size, enum dma_data_direction dir)
{
	unsigned long pfn = PFN_DOWN(handle);
	if (pfn_valid(pfn)) {
		if (__generic_dma_ops(hwdev)->sync_single_for_device)
			__generic_dma_ops(hwdev)->sync_single_for_device(hwdev, handle, size, dir);
	} else
		__xen_dma_sync_single_for_device(hwdev, handle, size, dir);
}

#endif /* _ASM_ARM_XEN_PAGE_COHERENT_H */
5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-28 11:50:17 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-28 11:50:17 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/include?h=nds-private-remove&amp;id=d56a5ca366e785f463b4782f65daac883612a2b2'>d56a5ca366e785f463b4782f65daac883612a2b2</a> (<a href='/cgit.cgi/linux/net-next.git/patch/tools/include?id=d56a5ca366e785f463b4782f65daac883612a2b2'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&amp;id=d56a5ca366e785f463b4782f65daac883612a2b2'>26ff9bf940fc911e81ab22717d9e6c3258c74bf8</a> /<a href='/cgit.cgi/linux/net-next.git/tree/tools/include?h=nds-private-remove&amp;id=d56a5ca366e785f463b4782f65daac883612a2b2'>tools/include</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/include?h=nds-private-remove&amp;id=dd553962675ab5747e887f89aea1ece90e6a802e'>dd553962675ab5747e887f89aea1ece90e6a802e</a> (<a href='/cgit.cgi/linux/net-next.git/diff/tools/include?h=nds-private-remove&amp;id=d56a5ca366e785f463b4782f65daac883612a2b2&amp;id2=dd553962675ab5747e887f89aea1ece90e6a802e'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/include?h=nds-private-remove&amp;id=ee6625a948d2e47267ec8fd97307fdd67d0f8a5b'>ee6625a948d2e47267ec8fd97307fdd67d0f8a5b</a> (<a href='/cgit.cgi/linux/net-next.git/diff/tools/include?h=nds-private-remove&amp;id=d56a5ca366e785f463b4782f65daac883612a2b2&amp;id2=ee6625a948d2e47267ec8fd97307fdd67d0f8a5b'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge tag 'nfs-for-4.10-4' of git://git.linux-nfs.org/projects/trondmy/linux-nfs</div><div class='commit-msg'>Pull NFS client bugfixes from Trond Myklebust:
 "Stable patches:
   - NFSv4.1: Fix a deadlock in layoutget
   - NFSv4 must not bump sequence ids on NFS4ERR_MOVED errors
   - NFSv4 Fix a regression with OPEN EXCLUSIVE4 mode
   - Fix a memory leak when removing the SUNRPC module

  Bugfixes:
   - Fix a reference leak in _pnfs_return_layout"

* tag 'nfs-for-4.10-4' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  pNFS: Fix a reference leak in _pnfs_return_layout
  nfs: Fix "Don't increment lock sequence ID after NFS4ERR_MOVED"
  SUNRPC: cleanup ida information when removing sunrpc module
  NFSv4.0: always send mode in SETATTR after EXCLUSIVE4
  nfs: Don't increment lock sequence ID after NFS4ERR_MOVED
  NFSv4.1: Fix a deadlock in layoutget
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=d56a5ca366e785f463b4782f65daac883612a2b2'>Diffstat</a> (limited to 'tools/include')</div><table summary='diffstat' class='diffstat'>