[deliverable/linux.git] / drivers / net / wireless / ath / main.c

/*
 * Copyright (c) 2009 Atheros Communications Inc.
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/kernel.h>
#include <linux/module.h>

#include "ath.h"

MODULE_AUTHOR("Atheros Communications");
MODULE_DESCRIPTION("Shared library for Atheros wireless LAN cards.");
MODULE_LICENSE("Dual BSD/GPL");

struct sk_buff *ath_rxbuf_alloc(struct ath_common *common,
				u32 len,
				gfp_t gfp_mask)
{
	struct sk_buff *skb;
	u32 off;

	/*
	 * Cache-line-align.  This is important (for the
	 * 5210 at least) as not doing so causes bogus data
	 * in rx'd frames.
	 */

	/* Note: the kernel can allocate a value greater than
	 * what we ask it to give us. We really only need 4 KB as that
	 * is this hardware supports and in fact we need at least 3849
	 * as that is the MAX AMSDU size this hardware supports.
	 * Unfortunately this means we may get 8 KB here from the
	 * kernel... and that is actually what is observed on some
	 * systems :( */
	skb = __dev_alloc_skb(len + common->cachelsz - 1, gfp_mask);
	if (skb != NULL) {
		off = ((unsigned long) skb->data) % common->cachelsz;
		if (off != 0)
			skb_reserve(skb, common->cachelsz - off);
	} else {
		pr_err("skbuff alloc of size %u failed\n", len);
		return NULL;
	}

	return skb;
}
EXPORT_SYMBOL(ath_rxbuf_alloc);

void ath_printk(const char *level, const struct ath_common* common,
		const char *fmt, ...)
{
	struct va_format vaf;
	va_list args;

	va_start(args, fmt);

	vaf.fmt = fmt;
	vaf.va = &args;

	if (common && common->hw && common->hw->wiphy)
		printk("%sath: %s: %pV",
		       level, wiphy_name(common->hw->wiphy), &vaf);
	else
		printk("%sath: %pV", level, &vaf);

	va_end(args);
}
EXPORT_SYMBOL(ath_printk);
Commit	Line	Data
a1c55580 CL	1	/*
	2	* Copyright (c) 2009 Atheros Communications Inc.
	3	*
	4	* Permission to use, copy, modify, and/or distribute this software for any
	5	* purpose with or without fee is hereby granted, provided that the above
	6	* copyright notice and this permission notice appear in all copies.
	7	*
	8	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
	9	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	10	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
	11	* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	12	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
	13	* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
	14	* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
	15	*/
	16
516304b0 JP	17	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
516304b0 JP	18
a1c55580 CL	19	#include <linux/kernel.h>
	20	#include <linux/module.h>
	21
d15dd3e5 LR	22	#include "ath.h"
d15dd3e5 LR	23
a1c55580 CL	24	MODULE_AUTHOR("Atheros Communications");
	25	MODULE_DESCRIPTION("Shared library for Atheros wireless LAN cards.");
	26	MODULE_LICENSE("Dual BSD/GPL");
d15dd3e5 LR	27
	28	struct sk_buff ath_rxbuf_alloc(struct ath_common common,
	29	u32 len,
	30	gfp_t gfp_mask)
	31	{
	32	struct sk_buff *skb;
	33	u32 off;
	34
	35	/*
	36	* Cache-line-align. This is important (for the
	37	* 5210 at least) as not doing so causes bogus data
	38	* in rx'd frames.
	39	*/
	40
	41	/* Note: the kernel can allocate a value greater than
	42	* what we ask it to give us. We really only need 4 KB as that
	43	* is this hardware supports and in fact we need at least 3849
	44	* as that is the MAX AMSDU size this hardware supports.
	45	* Unfortunately this means we may get 8 KB here from the
	46	* kernel... and that is actually what is observed on some
	47	* systems :( */
	48	skb = __dev_alloc_skb(len + common->cachelsz - 1, gfp_mask);
	49	if (skb != NULL) {
	50	off = ((unsigned long) skb->data) % common->cachelsz;
	51	if (off != 0)
	52	skb_reserve(skb, common->cachelsz - off);
	53	} else {
516304b0	54	pr_err("skbuff alloc of size %u failed\n", len);
d15dd3e5 LR	55	return NULL;
	56	}
	57
	58	return skb;
	59	}
	60	EXPORT_SYMBOL(ath_rxbuf_alloc);
21a99f93	61
98b36a02 BG	62	void ath_printk(const char level, const struct ath_common common,
98b36a02 BG	63	const char *fmt, ...)
21a99f93 JP	64	{
	65	struct va_format vaf;
	66	va_list args;
21a99f93 JP	67
	68	va_start(args, fmt);
	69
	70	vaf.fmt = fmt;
	71	vaf.va = &args;
	72
98b36a02 BG	73	if (common && common->hw && common->hw->wiphy)
	74	printk("%sath: %s: %pV",
	75	level, wiphy_name(common->hw->wiphy), &vaf);
	76	else
	77	printk("%sath: %pV", level, &vaf);
21a99f93 JP	78
21a99f93 JP	79	va_end(args);
21a99f93 JP	80	}
21a99f93 JP	81	EXPORT_SYMBOL(ath_printk);