/**

    AudioScience HPI driver
    Copyright (C) 1997-2014  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

*/

struct hpi_adapter_obj;

/* a function that takes an adapter obj and returns an int */
typedef int adapter_int_func(struct hpi_adapter_obj *pao, u32 message);

#define HPI_IRQ_NONE		(0)
#define HPI_IRQ_MESSAGE		(1)
#define HPI_IRQ_MIXER		(2)

struct hpi_adapter_obj {
	struct hpi_pci pci;	/* PCI info - bus#,dev#,address etc */
	u16 type;		/* 0x6644 == ASI6644 etc */
	u16 index;

	struct hpios_spinlock dsp_lock;

	u16 dsp_crashed;
	u16 has_control_cache;
	void *priv;
	adapter_int_func *irq_query_and_clear;
	struct hpi_hostbuffer_status *instream_host_buffer_status;
	struct hpi_hostbuffer_status *outstream_host_buffer_status;
};

struct hpi_control_cache {
	/** indicates whether the structures are initialized */
	u16 init;
	u16 adap_idx;
	u32 control_count;
	u32 cache_size_in_bytes;
	/** pointer to allocated memory of lookup pointers. */
	struct hpi_control_cache_info **p_info;
	/** pointer to DSP's control cache. */
	u8 *p_cache;
};

struct hpi_adapter_obj *hpi_find_adapter(u16 adapter_index);

u16 hpi_add_adapter(struct hpi_adapter_obj *pao);

void hpi_delete_adapter(struct hpi_adapter_obj *pao);

short hpi_check_control_cache(struct hpi_control_cache *pC,
	struct hpi_message *phm, struct hpi_response *phr);

short hpi_check_control_cache_single(struct hpi_control_cache_single *pC,
	struct hpi_message *phm, struct hpi_response *phr);

struct hpi_control_cache *hpi_alloc_control_cache(const u32
	number_of_controls, const u32 size_in_bytes, u8 *pDSP_control_buffer);

void hpi_free_control_cache(struct hpi_control_cache *p_cache);

void hpi_cmn_control_cache_sync_to_msg(struct hpi_control_cache *pC,
	struct hpi_message *phm, struct hpi_response *phr);

void hpi_cmn_control_cache_sync_to_msg_single(struct hpi_control_cache_single
	*pC, struct hpi_message *phm, struct hpi_response *phr);

u16 hpi_validate_response(struct hpi_message *phm, struct hpi_response *phr);

hpi_handler_func HPI_COMMON;
a href='/cgit.cgi/linux/net-next.git/commit/?id=d7df2443cd5f67fc6ee7c05a88e4996e8177f91b'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net?id=d7df2443cd5f67fc6ee7c05a88e4996e8177f91b'>net</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net/irda?id=d7df2443cd5f67fc6ee7c05a88e4996e8177f91b'>irda</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net/irda/irlap_frame.c?id=d7df2443cd5f67fc6ee7c05a88e4996e8177f91b'>irlap_frame.c</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='d7df2443cd5f67fc6ee7c05a88e4996e8177f91b'/><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>Benjamin Herrenschmidt &lt;benh@kernel.crashing.org&gt;</td><td class='right'>2017-02-03 17:10:28 +1100</td></tr>
<tr><th>committer</th><td>Michael Ellerman &lt;mpe@ellerman.id.au&gt;</td><td class='right'>2017-02-08 23:36:29 +1100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/irda/irlap_frame.c?id=d7df2443cd5f67fc6ee7c05a88e4996e8177f91b'>d7df2443cd5f67fc6ee7c05a88e4996e8177f91b</a> (<a href='/cgit.cgi/linux/net-next.git/patch/net/irda/irlap_frame.c?id=d7df2443cd5f67fc6ee7c05a88e4996e8177f91b'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=d7df2443cd5f67fc6ee7c05a88e4996e8177f91b'>098a7c0ca4fceb8a65cb1f693c9d71990388933d</a> /<a href='/cgit.cgi/linux/net-next.git/tree/net/irda/irlap_frame.c?id=d7df2443cd5f67fc6ee7c05a88e4996e8177f91b'>net/irda/irlap_frame.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/irda/irlap_frame.c?id=a0615a16f7d0ceb5804d295203c302d496d8ee91'>a0615a16f7d0ceb5804d295203c302d496d8ee91</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/irda/irlap_frame.c?id=d7df2443cd5f67fc6ee7c05a88e4996e8177f91b&amp;id2=a0615a16f7d0ceb5804d295203c302d496d8ee91'>diff</a>)</td></tr></table>
<div class='commit-subject'>powerpc/mm: Fix spurrious segfaults on radix with autonuma</div><div class='commit-msg'>When autonuma (Automatic NUMA balancing) marks a PTE inaccessible it
clears all the protection bits but leave the PTE valid.

With the Radix MMU, an attempt at executing from such a PTE will
take a fault with bit 35 of SRR1 set "SRR1_ISI_N_OR_G".

It is thus incorrect to treat all such faults as errors. We should
pass them to handle_mm_fault() for autonuma to deal with. The case
of pages that are really not executable is handled by the existing
test for VM_EXEC further down.

That leaves us with catching the kernel attempts at executing user
pages. We can catch that earlier, even before we do find_vma.

It is never valid on powerpc for the kernel to take an exec fault
to begin with. So fold that test with the existing test for the
kernel faulting on kernel addresses to bail out early.

Fixes: 1d18ad026844 ("powerpc/mm: Detect instruction fetch denied and report")
Signed-off-by: Benjamin Herrenschmidt &lt;benh@kernel.crashing.org&gt;
Reviewed-by: Aneesh Kumar K.V &lt;aneesh.kumar@linux.vnet.ibm.com&gt;
Acked-by: Balbir Singh &lt;bsingharora@gmail.com&gt;
Signed-off-by: Michael Ellerman &lt;mpe@ellerman.id.au&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=d7df2443cd5f67fc6ee7c05a88e4996e8177f91b'>Diffstat</a> (limited to 'net/irda/irlap_frame.c')</div><table summary='diffstat' class='diffstat'>