/*
 * OHCI HCD (Host Controller Driver) for USB.
 *
 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
 * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
 *
 * This file is licenced under the GPL.
 */

/*-------------------------------------------------------------------------*/

/*
 * OHCI deals with three types of memory:
 *	- data used only by the HCD ... kmalloc is fine
 *	- async and periodic schedules, shared by HC and HCD ... these
 *	  need to use dma_pool or dma_alloc_coherent
 *	- driver buffers, read/written by HC ... the hcd glue or the
 *	  device driver provides us with dma addresses
 *
 * There's also "register" data, which is memory mapped.
 * No memory seen by this driver (or any HCD) may be paged out.
 */

/*-------------------------------------------------------------------------*/

static void ohci_hcd_init (struct ohci_hcd *ohci)
{
	ohci->next_statechange = jiffies;
	spin_lock_init (&ohci->lock);
	INIT_LIST_HEAD (&ohci->pending);
	INIT_LIST_HEAD(&ohci->eds_in_use);
}

/*-------------------------------------------------------------------------*/

static int ohci_mem_init (struct ohci_hcd *ohci)
{
	ohci->td_cache = dma_pool_create ("ohci_td",
		ohci_to_hcd(ohci)->self.controller,
		sizeof (struct td),
		32 /* byte alignment */,
		0 /* no page-crossing issues */);
	if (!ohci->td_cache)
		return -ENOMEM;
	ohci->ed_cache = dma_pool_create ("ohci_ed",
		ohci_to_hcd(ohci)->self.controller,
		sizeof (struct ed),
		16 /* byte alignment */,
		0 /* no page-crossing issues */);
	if (!ohci->ed_cache) {
		dma_pool_destroy (ohci->td_cache);
		return -ENOMEM;
	}
	return 0;
}

static void ohci_mem_cleanup (struct ohci_hcd *ohci)
{
	if (ohci->td_cache) {
		dma_pool_destroy (ohci->td_cache);
		ohci->td_cache = NULL;
	}
	if (ohci->ed_cache) {
		dma_pool_destroy (ohci->ed_cache);
		ohci->ed_cache = NULL;
	}
}

/*-------------------------------------------------------------------------*/

/* ohci "done list" processing needs this mapping */
static inline struct td *
dma_to_td (struct ohci_hcd *hc, dma_addr_t td_dma)
{
	struct td *td;

	td_dma &= TD_MASK;
	td = hc->td_hash [TD_HASH_FUNC(td_dma)];
	while (td && td->td_dma != td_dma)
		td = td->td_hash;
	return td;
}

/* TDs ... */
static struct td *
td_alloc (struct ohci_hcd *hc, gfp_t mem_flags)
{
	dma_addr_t	dma;
	struct td	*td;

	td = dma_pool_zalloc (hc->td_cache, mem_flags, &dma);
	if (td) {
		/* in case hc fetches it, make it look dead */
		td->hwNextTD = cpu_to_hc32 (hc, dma);
		td->td_dma = dma;
		/* hashed in td_fill */
	}
	return td;
}

static void
td_free (struct ohci_hcd *hc, struct td *td)
{
	struct td	**prev = &hc->td_hash [TD_HASH_FUNC (td->td_dma)];

	while (*prev && *prev != td)
		prev = &(*prev)->td_hash;
	if (*prev)
		*prev = td->td_hash;
	else if ((td->hwINFO & cpu_to_hc32(hc, TD_DONE)) != 0)
		ohci_dbg (hc, "no hash for td %p\n", td);
	dma_pool_free (hc->td_cache, td, td->td_dma);
}

/*-------------------------------------------------------------------------*/

/* EDs ... */
static struct ed *
ed_alloc (struct ohci_hcd *hc, gfp_t mem_flags)
{
	dma_addr_t	dma;
	struct ed	*ed;

	ed = dma_pool_zalloc (hc->ed_cache, mem_flags, &dma);
	if (ed) {
		INIT_LIST_HEAD (&ed->td_list);
		ed->dma = dma;
	}
	return ed;
}

static void
ed_free (struct ohci_hcd *hc, struct ed *ed)
{
	dma_pool_free (hc->ed_cache, ed, ed->dma);
}

sound/usb/caiaq?h=nds-private-remove&amp;id=095cbe66973771fecd8e8b1e8763181363ef703e'>caiaq</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound/usb/caiaq/audio.h?h=nds-private-remove&amp;id=095cbe66973771fecd8e8b1e8763181363ef703e'>audio.h</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='095cbe66973771fecd8e8b1e8763181363ef703e'/><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'>2017-01-22 12:47:48 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-22 12:47:48 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/usb/caiaq/audio.h?h=nds-private-remove&amp;id=095cbe66973771fecd8e8b1e8763181363ef703e'>095cbe66973771fecd8e8b1e8763181363ef703e</a> (<a href='/cgit.cgi/linux/net-next.git/patch/sound/usb/caiaq/audio.h?id=095cbe66973771fecd8e8b1e8763181363ef703e'>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=095cbe66973771fecd8e8b1e8763181363ef703e'>c361a93d62ed171ac958deb0d4ff0faa980bb290</a> /<a href='/cgit.cgi/linux/net-next.git/tree/sound/usb/caiaq/audio.h?h=nds-private-remove&amp;id=095cbe66973771fecd8e8b1e8763181363ef703e'>sound/usb/caiaq/audio.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/usb/caiaq/audio.h?h=nds-private-remove&amp;id=24b86839fab8e8059d2b16e0067dc86a1a0d3514'>24b86839fab8e8059d2b16e0067dc86a1a0d3514</a> (<a href='/cgit.cgi/linux/net-next.git/diff/sound/usb/caiaq/audio.h?h=nds-private-remove&amp;id=095cbe66973771fecd8e8b1e8763181363ef703e&amp;id2=24b86839fab8e8059d2b16e0067dc86a1a0d3514'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/usb/caiaq/audio.h?h=nds-private-remove&amp;id=020eb3daaba2857b32c4cf4c82f503d6a00a67de'>020eb3daaba2857b32c4cf4c82f503d6a00a67de</a> (<a href='/cgit.cgi/linux/net-next.git/diff/sound/usb/caiaq/audio.h?h=nds-private-remove&amp;id=095cbe66973771fecd8e8b1e8763181363ef703e&amp;id2=020eb3daaba2857b32c4cf4c82f503d6a00a67de'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip</div><div class='commit-msg'>Pull x86 fix from Thomas Gleixner:
 "Restore the retrigger callbacks in the IO APIC irq chips. That
  addresses a long standing regression which got introduced with the
  rewrite of the x86 irq subsystem two years ago and went unnoticed so
  far"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/ioapic: Restore IO-APIC irq_chip retrigger callback
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=095cbe66973771fecd8e8b1e8763181363ef703e'>Diffstat</a> (limited to 'sound/usb/caiaq/audio.h')</div><table summary='diffstat' class='diffstat'>