/*
 * Renesas R-Car CMD support
 *
 * Copyright (C) 2015 Renesas Solutions Corp.
 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#include "rsnd.h"

struct rsnd_cmd {
	struct rsnd_mod mod;
};

#define CMD_NAME "cmd"

#define rsnd_cmd_nr(priv) ((priv)->cmd_nr)
#define for_each_rsnd_cmd(pos, priv, i)					\
	for ((i) = 0;							\
	     ((i) < rsnd_cmd_nr(priv)) &&				\
		     ((pos) = (struct rsnd_cmd *)(priv)->cmd + i);	\
	     i++)

static int rsnd_cmd_init(struct rsnd_mod *mod,
			 struct rsnd_dai_stream *io,
			 struct rsnd_priv *priv)
{
	struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io);
	struct rsnd_mod *mix = rsnd_io_to_mod_mix(io);
	struct device *dev = rsnd_priv_to_dev(priv);
	u32 data;

	if (!mix && !dvc)
		return 0;

	if (mix) {
		struct rsnd_dai *rdai;
		struct rsnd_mod *src;
		struct rsnd_dai_stream *tio;
		int i;
		u32 path[] = {
			[0] = 0,
			[1] = 1 << 0,
			[2] = 0,
			[3] = 0,
			[4] = 0,
			[5] = 1 << 8
		};

		/*
		 * it is assuming that integrater is well understanding about
		 * data path. Here doesn't check impossible connection,
		 * like src2 + src5
		 */
		data = 0;
		for_each_rsnd_dai(rdai, priv, i) {
			tio = &rdai->playback;
			src = rsnd_io_to_mod_src(tio);
			if (mix == rsnd_io_to_mod_mix(tio))
				data |= path[rsnd_mod_id(src)];

			tio = &rdai->capture;
			src = rsnd_io_to_mod_src(tio);
			if (mix == rsnd_io_to_mod_mix(tio))
				data |= path[rsnd_mod_id(src)];
		}

	} else {
		struct rsnd_mod *src = rsnd_io_to_mod_src(io);

		u32 path[] = {
			[0] = 0x30000,
			[1] = 0x30001,
			[2] = 0x40000,
			[3] = 0x10000,
			[4] = 0x20000,
			[5] = 0x40100
		};

		data = path[rsnd_mod_id(src)];
	}

	dev_dbg(dev, "ctu/mix path = 0x%08x", data);

	rsnd_mod_write(mod, CMD_ROUTE_SLCT, data);
	rsnd_mod_write(mod, CMD_BUSIF_DALIGN, rsnd_get_dalign(mod, io));

	rsnd_adg_set_cmd_timsel_gen2(mod, io);

	return 0;
}

static int rsnd_cmd_start(struct rsnd_mod *mod,
			  struct rsnd_dai_stream *io,
			  struct rsnd_priv *priv)
{
	rsnd_mod_write(mod, CMD_CTRL, 0x10);

	return 0;
}

static int rsnd_cmd_stop(struct rsnd_mod *mod,
			 struct rsnd_dai_stream *io,
			 struct rsnd_priv *priv)
{
	rsnd_mod_write(mod, CMD_CTRL, 0);

	return 0;
}

static struct rsnd_mod_ops rsnd_cmd_ops = {
	.name	= CMD_NAME,
	.init	= rsnd_cmd_init,
	.start	= rsnd_cmd_start,
	.stop	= rsnd_cmd_stop,
};

int rsnd_cmd_attach(struct rsnd_dai_stream *io, int id)
{
	struct rsnd_priv *priv = rsnd_io_to_priv(io);
	struct rsnd_mod *mod = rsnd_cmd_mod_get(priv, id);

	return rsnd_dai_connect(mod, io, mod->type);
}

struct rsnd_mod *rsnd_cmd_mod_get(struct rsnd_priv *priv, int id)
{
	if (WARN_ON(id < 0 || id >= rsnd_cmd_nr(priv)))
		id = 0;

	return rsnd_mod_get((struct rsnd_cmd *)(priv->cmd) + id);
}

int rsnd_cmd_probe(struct rsnd_priv *priv)
{
	struct device *dev = rsnd_priv_to_dev(priv);
	struct rsnd_cmd *cmd;
	int i, nr, ret;

	/* This driver doesn't support Gen1 at this point */
	if (rsnd_is_gen1(priv))
		return 0;

	/* same number as DVC */
	nr = priv->dvc_nr;
	if (!nr)
		return 0;

	cmd = devm_kzalloc(dev, sizeof(*cmd) * nr, GFP_KERNEL);
	if (!cmd)
		return -ENOMEM;

	priv->cmd_nr	= nr;
	priv->cmd	= cmd;

	for_each_rsnd_cmd(cmd, priv, i) {
		ret = rsnd_mod_init(priv, rsnd_mod_get(cmd),
				    &rsnd_cmd_ops, NULL,
				    rsnd_mod_get_status, RSND_MOD_CMD, i);
		if (ret)
			return ret;
	}

	return 0;
}

void rsnd_cmd_remove(struct rsnd_priv *priv)
{
	struct rsnd_cmd *cmd;
	int i;

	for_each_rsnd_cmd(cmd, priv, i) {
		rsnd_mod_quit(rsnd_mod_get(cmd));
	}
}
>vphn.c</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='c8f325a59cfc718d13a50fbc746ed9b415c25e92'/><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>Ard Biesheuvel &lt;ard.biesheuvel@linaro.org&gt;</td><td class='right'>2017-02-01 17:45:02 +0000</td></tr>
<tr><th>committer</th><td>Ingo Molnar &lt;mingo@kernel.org&gt;</td><td class='right'>2017-02-01 21:17:49 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/testing/selftests/powerpc/vphn/vphn.c?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>c8f325a59cfc718d13a50fbc746ed9b415c25e92</a> (<a href='/cgit.cgi/linux/net-next.git/patch/tools/testing/selftests/powerpc/vphn/vphn.c?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>d53fbdac9d0781e39a13b2ac6b2bd258cf3b4140</a> /<a href='/cgit.cgi/linux/net-next.git/tree/tools/testing/selftests/powerpc/vphn/vphn.c?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>tools/testing/selftests/powerpc/vphn/vphn.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/testing/selftests/powerpc/vphn/vphn.c?id=bf29bddf0417a4783da3b24e8c9e017ac649326f'>bf29bddf0417a4783da3b24e8c9e017ac649326f</a> (<a href='/cgit.cgi/linux/net-next.git/diff/tools/testing/selftests/powerpc/vphn/vphn.c?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92&amp;id2=bf29bddf0417a4783da3b24e8c9e017ac649326f'>diff</a>)</td></tr></table>
<div class='commit-subject'>efi/fdt: Avoid FDT manipulation after ExitBootServices()</div><div class='commit-msg'>Some AArch64 UEFI implementations disable the MMU in ExitBootServices(),
after which unaligned accesses to RAM are no longer supported.

Commit:

  abfb7b686a3e ("efi/libstub/arm*: Pass latest memory map to the kernel")

fixed an issue in the memory map handling of the stub FDT code, but
inadvertently created an issue with such firmware, by moving some
of the FDT manipulation to after the invocation of ExitBootServices().

Given that the stub's libfdt implementation uses the ordinary, accelerated
string functions, which rely on hardware handling of unaligned accesses,
manipulating the FDT with the MMU off may result in alignment faults.

So fix the situation by moving the update_fdt_memmap() call into the
callback function invoked by efi_exit_boot_services() right before it
calls the ExitBootServices() UEFI service (which is arguably a better
place for it anyway)

Note that disabling the MMU in ExitBootServices() is not compliant with
the UEFI spec, and carries great risk due to the fact that switching from
cached to uncached memory accesses halfway through compiler generated code
(i.e., involving a stack) can never be done in a way that is architecturally
safe.

Fixes: abfb7b686a3e ("efi/libstub/arm*: Pass latest memory map to the kernel")
Signed-off-by: Ard Biesheuvel &lt;ard.biesheuvel@linaro.org&gt;
Tested-by: Riku Voipio &lt;riku.voipio@linaro.org&gt;
Cc: &lt;stable@vger.kernel.org&gt;
Cc: mark.rutland@arm.com
Cc: linux-efi@vger.kernel.org
Cc: matt@codeblueprint.co.uk
Cc: leif.lindholm@linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/1485971102-23330-2-git-send-email-ard.biesheuvel@linaro.org
Signed-off-by: Ingo Molnar &lt;mingo@kernel.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>Diffstat</a> (limited to 'tools/testing/selftests/powerpc/vphn/vphn.c')</div><table summary='diffstat' class='diffstat'>