/* Support for hardware buffer manager.
 *
 * Copyright (C) 2016 Marvell
 *
 * Gregory CLEMENT <gregory.clement@free-electrons.com>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 */
#include <linux/kernel.h>
#include <linux/printk.h>
#include <linux/skbuff.h>
#include <net/hwbm.h>

void hwbm_buf_free(struct hwbm_pool *bm_pool, void *buf)
{
	if (likely(bm_pool->frag_size <= PAGE_SIZE))
		skb_free_frag(buf);
	else
		kfree(buf);
}
EXPORT_SYMBOL_GPL(hwbm_buf_free);

/* Refill processing for HW buffer management */
int hwbm_pool_refill(struct hwbm_pool *bm_pool, gfp_t gfp)
{
	int frag_size = bm_pool->frag_size;
	void *buf;

	if (likely(frag_size <= PAGE_SIZE))
		buf = netdev_alloc_frag(frag_size);
	else
		buf = kmalloc(frag_size, gfp);

	if (!buf)
		return -ENOMEM;

	if (bm_pool->construct)
		if (bm_pool->construct(bm_pool, buf)) {
			hwbm_buf_free(bm_pool, buf);
			return -ENOMEM;
		}

	return 0;
}
EXPORT_SYMBOL_GPL(hwbm_pool_refill);

int hwbm_pool_add(struct hwbm_pool *bm_pool, unsigned int buf_num, gfp_t gfp)
{
	int err, i;
	unsigned long flags;

	spin_lock_irqsave(&bm_pool->lock, flags);
	if (bm_pool->buf_num == bm_pool->size) {
		pr_warn("pool already filled\n");
		spin_unlock_irqrestore(&bm_pool->lock, flags);
		return bm_pool->buf_num;
	}

	if (buf_num + bm_pool->buf_num > bm_pool->size) {
		pr_warn("cannot allocate %d buffers for pool\n",
			buf_num);
		spin_unlock_irqrestore(&bm_pool->lock, flags);
		return 0;
	}

	if ((buf_num + bm_pool->buf_num) < bm_pool->buf_num) {
		pr_warn("Adding %d buffers to the %d current buffers will overflow\n",
			buf_num,  bm_pool->buf_num);
		spin_unlock_irqrestore(&bm_pool->lock, flags);
		return 0;
	}

	for (i = 0; i < buf_num; i++) {
		err = hwbm_pool_refill(bm_pool, gfp);
		if (err < 0)
			break;
	}

	/* Update BM driver with number of buffers added to pool */
	bm_pool->buf_num += i;

	pr_debug("hwpm pool: %d of %d buffers added\n", i, buf_num);
	spin_unlock_irqrestore(&bm_pool->lock, flags);

	return i;
}
EXPORT_SYMBOL_GPL(hwbm_pool_add);
und/pci/au88x0'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=f9a42e0d58cf0fe3d902e63d4582f2ea4cd2bb8b'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound?id=f9a42e0d58cf0fe3d902e63d4582f2ea4cd2bb8b'>sound</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound/pci?id=f9a42e0d58cf0fe3d902e63d4582f2ea4cd2bb8b'>pci</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound/pci/au88x0?id=f9a42e0d58cf0fe3d902e63d4582f2ea4cd2bb8b'>au88x0</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='f9a42e0d58cf0fe3d902e63d4582f2ea4cd2bb8b'/><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'>2017-01-30 15:47:19 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-30 15:47:19 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/pci/au88x0?id=f9a42e0d58cf0fe3d902e63d4582f2ea4cd2bb8b'>f9a42e0d58cf0fe3d902e63d4582f2ea4cd2bb8b</a> (<a href='/cgit.cgi/linux/net-next.git/patch/sound/pci/au88x0?id=f9a42e0d58cf0fe3d902e63d4582f2ea4cd2bb8b'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=f9a42e0d58cf0fe3d902e63d4582f2ea4cd2bb8b'>4078d3ae27d4ebb85bdcd4d84e9b9a4d059f22bb</a> /<a href='/cgit.cgi/linux/net-next.git/tree/sound/pci/au88x0?id=f9a42e0d58cf0fe3d902e63d4582f2ea4cd2bb8b'>sound/pci/au88x0</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/pci/au88x0?id=751321b3dd5040dc5be19bd23f985e80c914621a'>751321b3dd5040dc5be19bd23f985e80c914621a</a> (<a href='/cgit.cgi/linux/net-next.git/diff/sound/pci/au88x0?id=f9a42e0d58cf0fe3d902e63d4582f2ea4cd2bb8b&amp;id2=751321b3dd5040dc5be19bd23f985e80c914621a'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/pci/au88x0?id=54791b276b4000b307339f269d3bf7db877d536f'>54791b276b4000b307339f269d3bf7db877d536f</a> (<a href='/cgit.cgi/linux/net-next.git/diff/sound/pci/au88x0?id=f9a42e0d58cf0fe3d902e63d4582f2ea4cd2bb8b&amp;id2=54791b276b4000b307339f269d3bf7db877d536f'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc</div><div class='commit-msg'>Pull sparc fixes from David Miller:
 "Several small bug fixes and tidies, along with a fix for non-resumable
  memory errors triggered by userspace"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
  sparc64: Handle PIO &amp; MEM non-resumable errors.
  sparc64: Zero pages on allocation for mondo and error queues.
  sparc: Fixed typo in sstate.c. Replaced panicing with panicking
  sparc: use symbolic names for tsb indexing
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=f9a42e0d58cf0fe3d902e63d4582f2ea4cd2bb8b'>Diffstat</a> (limited to 'sound/pci/au88x0')</div><table summary='diffstat' class='diffstat'>