/******************************************************************************

    AudioScience HPI driver
    Copyright (C) 1997-2012  AudioScience Inc. <support@audioscience.com>

    This program is free software; you can redistribute it and/or modify
    it under the terms of version 2 of the GNU General Public License as
    published by the Free Software Foundation;

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

HPI Operating System function implementation for Linux

(C) Copyright AudioScience Inc. 1997-2003
******************************************************************************/
#define SOURCEFILE_NAME "hpios.c"
#include "hpi_internal.h"
#include "hpidebug.h"
#include <linux/delay.h>
#include <linux/sched.h>

void hpios_delay_micro_seconds(u32 num_micro_sec)
{
	if ((usecs_to_jiffies(num_micro_sec) > 1) && !in_interrupt()) {
		/* MUST NOT SCHEDULE IN INTERRUPT CONTEXT! */
		schedule_timeout_uninterruptible(usecs_to_jiffies
			(num_micro_sec));
	} else if (num_micro_sec <= 2000)
		udelay(num_micro_sec);
	else
		mdelay(num_micro_sec / 1000);

}

/** Allocate an area of locked memory for bus master DMA operations.

If allocation fails, return 1, and *pMemArea.size = 0
*/
u16 hpios_locked_mem_alloc(struct consistent_dma_area *p_mem_area, u32 size,
	struct pci_dev *pdev)
{
	/*?? any benefit in using managed dmam_alloc_coherent? */
	p_mem_area->vaddr =
		dma_alloc_coherent(&pdev->dev, size, &p_mem_area->dma_handle,
		GFP_DMA32 | GFP_KERNEL);

	if (p_mem_area->vaddr) {
		HPI_DEBUG_LOG(DEBUG, "allocated %d bytes, dma 0x%x vma %p\n",
			size, (unsigned int)p_mem_area->dma_handle,
			p_mem_area->vaddr);
		p_mem_area->pdev = &pdev->dev;
		p_mem_area->size = size;
		return 0;
	} else {
		HPI_DEBUG_LOG(WARNING,
			"failed to allocate %d bytes locked memory\n", size);
		p_mem_area->size = 0;
		return 1;
	}
}

u16 hpios_locked_mem_free(struct consistent_dma_area *p_mem_area)
{
	if (p_mem_area->size) {
		dma_free_coherent(p_mem_area->pdev, p_mem_area->size,
			p_mem_area->vaddr, p_mem_area->dma_handle);
		HPI_DEBUG_LOG(DEBUG, "freed %lu bytes, dma 0x%x vma %p\n",
			(unsigned long)p_mem_area->size,
			(unsigned int)p_mem_area->dma_handle,
			p_mem_area->vaddr);
		p_mem_area->size = 0;
		return 0;
	} else {
		return 1;
	}
}
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/Documentation?id=e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba'>Documentation</a>/<a href='/cgit.cgi/linux/net-next.git/commit/Documentation/arm?id=e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba'>arm</a>/<a href='/cgit.cgi/linux/net-next.git/commit/Documentation/arm/Samsung-S3C24XX?id=e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba'>Samsung-S3C24XX</a>/<a href='/cgit.cgi/linux/net-next.git/commit/Documentation/arm/Samsung-S3C24XX/Suspend.txt?id=e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba'>Suspend.txt</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba'/><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'>2016-12-12 21:58:13 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2016-12-12 21:58:13 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation/arm/Samsung-S3C24XX/Suspend.txt?id=e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba'>e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba</a> (<a href='/cgit.cgi/linux/net-next.git/patch/Documentation/arm/Samsung-S3C24XX/Suspend.txt?id=e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba'>f63906f41699c8e38af9d12b063e2ceab0286ef2</a> /<a href='/cgit.cgi/linux/net-next.git/tree/Documentation/arm/Samsung-S3C24XX/Suspend.txt?id=e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba'>Documentation/arm/Samsung-S3C24XX/Suspend.txt</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation/arm/Samsung-S3C24XX/Suspend.txt?id=e34bac726d27056081d0250c0e173e4b155aa340'>e34bac726d27056081d0250c0e173e4b155aa340</a> (<a href='/cgit.cgi/linux/net-next.git/diff/Documentation/arm/Samsung-S3C24XX/Suspend.txt?id=e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba&amp;id2=e34bac726d27056081d0250c0e173e4b155aa340'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation/arm/Samsung-S3C24XX/Suspend.txt?id=868c97a846a73e937d835b09b8c885a69df50ec8'>868c97a846a73e937d835b09b8c885a69df50ec8</a> (<a href='/cgit.cgi/linux/net-next.git/diff/Documentation/arm/Samsung-S3C24XX/Suspend.txt?id=e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba&amp;id2=868c97a846a73e937d835b09b8c885a69df50ec8'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge tag 'docs-4.10' of git://git.lwn.net/linux<span class='decoration'><a class='deco' href='/cgit.cgi/linux/net-next.git/commit/Documentation/arm/Samsung-S3C24XX/Suspend.txt?id=e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba'>HEAD</a><a class='branch-deco' href='/cgit.cgi/linux/net-next.git/log/Documentation/arm/Samsung-S3C24XX/Suspend.txt'>master</a></span></div><div class='commit-msg'>Pull documentation update from Jonathan Corbet:
 "These are the documentation changes for 4.10.

  It's another busy cycle for the docs tree, as the sphinx conversion
  continues. Highlights include:

   - Further work on PDF output, which remains a bit of a pain but
     should be more solid now.

   - Five more DocBook template files converted to Sphinx. Only 27 to
     go... Lots of plain-text files have also been converted and
     integrated.

   - Images in binary formats have been replaced with more
     source-friendly versions.

   - Various bits of organizational work, including the renaming of
     various files discussed at the kernel summit.

   - New documentation for the device_link mechanism.

  ... and, of course, lots of typo fixes and small updates"

* tag 'docs-4.10' of git://git.lwn.net/linux: (193 commits)
  dma-buf: Extract dma-buf.rst
  Update Documentation/00-INDEX
  docs: 00-INDEX: document directories/files with no docs
  docs: 00-INDEX: remove non-existing entries
  docs: 00-INDEX: add missing entries for documentation files/dirs
  docs: 00-INDEX: consolidate process/ and admin-guide/ description
  scripts: add a script to check if Documentation/00-INDEX is sane
  Docs: change sh -&gt; awk in REPORTING-BUGS
  Documentation/core-api/device_link: Add initial documentation
  core-api: remove an unexpected unident
  ppc/idle: Add documentation for powersave=off
  Doc: Correct typo, "Introdution" =&gt; "Introduction"
  Documentation/atomic_ops.txt: convert to ReST markup
  Documentation/local_ops.txt: convert to ReST markup
  Documentation/assoc_array.txt: convert to ReST markup
  docs-rst: parse-headers.pl: cleanup the documentation
  docs-rst: fix media cleandocs target
  docs-rst: media/Makefile: reorganize the rules
  docs-rst: media: build SVG from graphviz files
  docs-rst: replace bayer.png by a SVG image
  ...
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba'>Diffstat</a> (limited to 'Documentation/arm/Samsung-S3C24XX/Suspend.txt')</div><table summary='diffstat' class='diffstat'>