/*
 *	lib/dma-noop.c
 *
 * Simple DMA noop-ops that map 1:1 with memory
 */
#include <linux/export.h>
#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,
			    unsigned long 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,
			  unsigned long attrs)
{
	free_pages((unsigned long)cpu_addr, get_order(size));
}

static dma_addr_t dma_noop_map_page(struct device *dev, struct page *page,
				      unsigned long offset, size_t size,
				      enum dma_data_direction dir,
				      unsigned long attrs)
{
	return page_to_phys(page) + offset;
}

static int dma_noop_map_sg(struct device *dev, struct scatterlist *sgl, int nents,
			     enum dma_data_direction dir,
			     unsigned long attrs)
{
	int i;
	struct scatterlist *sg;

	for_each_sg(sgl, sg, nents, i) {
		void *va;

		BUG_ON(!sg_page(sg));
		va = sg_virt(sg);
		sg_dma_address(sg) = (dma_addr_t)virt_to_phys(va);
		sg_dma_len(sg) = sg->length;
	}

	return nents;
}

static int dma_noop_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
	return 0;
}

static int dma_noop_supported(struct device *dev, u64 mask)
{
	return 1;
}

struct dma_map_ops dma_noop_ops = {
	.alloc			= dma_noop_alloc,
	.free			= dma_noop_free,
	.map_page		= dma_noop_map_page,
	.map_sg			= dma_noop_map_sg,
	.mapping_error		= dma_noop_mapping_error,
	.dma_supported		= dma_noop_supported,
};

EXPORT_SYMBOL(dma_noop_ops);
8d4cf43c943a40c9aaa836f9b7431'>refs</a><a href='/cgit.cgi/linux/net-next.git/log/tools/perf/util/event.h'>log</a><a href='/cgit.cgi/linux/net-next.git/tree/tools/perf/util/event.h?id=b272f732f888d4cf43c943a40c9aaa836f9b7431'>tree</a><a class='active' href='/cgit.cgi/linux/net-next.git/commit/tools/perf/util/event.h?id=b272f732f888d4cf43c943a40c9aaa836f9b7431'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/tools/perf/util/event.h?id=b272f732f888d4cf43c943a40c9aaa836f9b7431'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/tools/perf/util/event.h'>
<input type='hidden' name='id' value='b272f732f888d4cf43c943a40c9aaa836f9b7431'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=b272f732f888d4cf43c943a40c9aaa836f9b7431'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools?id=b272f732f888d4cf43c943a40c9aaa836f9b7431'>tools</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/perf?id=b272f732f888d4cf43c943a40c9aaa836f9b7431'>perf</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/util?id=b272f732f888d4cf43c943a40c9aaa836f9b7431'>util</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/util/event.h?id=b272f732f888d4cf43c943a40c9aaa836f9b7431'>event.h</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='b272f732f888d4cf43c943a40c9aaa836f9b7431'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>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'>2016-12-25 14:05:56 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2016-12-25 14:05:56 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/util/event.h?id=b272f732f888d4cf43c943a40c9aaa836f9b7431'>b272f732f888d4cf43c943a40c9aaa836f9b7431</a> (<a href='/cgit.cgi/linux/net-next.git/patch/tools/perf/util/event.h?id=b272f732f888d4cf43c943a40c9aaa836f9b7431'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=b272f732f888d4cf43c943a40c9aaa836f9b7431'>da9cac6b9d12b83592c16d3503c0e3f2f00f146f</a> /<a href='/cgit.cgi/linux/net-next.git/tree/tools/perf/util/event.h?id=b272f732f888d4cf43c943a40c9aaa836f9b7431'>tools/perf/util/event.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/util/event.h?id=10bbe7599e2755d3f3e100103967788b8b5a4bce'>10bbe7599e2755d3f3e100103967788b8b5a4bce</a> (<a href='/cgit.cgi/linux/net-next.git/diff/tools/perf/util/event.h?id=b272f732f888d4cf43c943a40c9aaa836f9b7431&amp;id2=10bbe7599e2755d3f3e100103967788b8b5a4bce'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/util/event.h?id=008b69e4d52f2cbee3ed0d0502edd78155000b1a'>008b69e4d52f2cbee3ed0d0502edd78155000b1a</a> (<a href='/cgit.cgi/linux/net-next.git/diff/tools/perf/util/event.h?id=b272f732f888d4cf43c943a40c9aaa836f9b7431&amp;id2=008b69e4d52f2cbee3ed0d0502edd78155000b1a'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge branch 'smp-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip</div><div class='commit-msg'>Pull SMP hotplug notifier removal from Thomas Gleixner:
 "This is the final cleanup of the hotplug notifier infrastructure. The
  series has been reintgrated in the last two days because there came a
  new driver using the old infrastructure via the SCSI tree.

  Summary:

   - convert the last leftover drivers utilizing notifiers

   - fixup for a completely broken hotplug user

   - prevent setup of already used states

   - removal of the notifiers

   - treewide cleanup of hotplug state names

   - consolidation of state space

  There is a sphinx based documentation pending, but that needs review
  from the documentation folks"

* 'smp-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  irqchip/armada-xp: Consolidate hotplug state space
  irqchip/gic: Consolidate hotplug state space
  coresight/etm3/4x: Consolidate hotplug state space
  cpu/hotplug: Cleanup state names
  cpu/hotplug: Remove obsolete cpu hotplug register/unregister functions
  staging/lustre/libcfs: Convert to hotplug state machine
  scsi/bnx2i: Convert to hotplug state machine
  scsi/bnx2fc: Convert to hotplug state machine
  cpu/hotplug: Prevent overwriting of callbacks
  x86/msr: Remove bogus cleanup from the error path
  bus: arm-ccn: Prevent hotplug callback leak
  perf/x86/intel/cstate: Prevent hotplug callback leak
  ARM/imx/mmcd: Fix broken cpu hotplug handling
  scsi: qedi: Convert to hotplug state machine
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=b272f732f888d4cf43c943a40c9aaa836f9b7431'>Diffstat</a> (limited to 'tools/perf/util/event.h')</div><table summary='diffstat' class='diffstat'>