https://github.com/torvalds/linux
Revision 36a5fdf76d3281345e000e115f33817570a76420 authored by Dave Airlie on 03 November 2017, 19:43:44 UTC, committed by Dave Airlie on 03 November 2017, 19:43:44 UTC
This time really the last i915 batch for v4.15: - PSR state tracking in crtc state (Ville) - Fix eviction when the GGTT is idle but full (Chris) - BDW DP aux channel timeout fix (James) - LSPCON detection fixes (Shashank) - Use for_each_pipe to iterate over pipes (Mika Kahola) - Replace *_reference/unreference() or *_ref/unref with _get/put() (Harsha) - Refactoring and preparation for DDI encoder type cleanup (Ville) - Broadwell DDI FDI buf translation fix (Chris) - Read CSB and CSB write pointer from HWSP in GVT-g VM if available (Weinan) - GuC/HuC firmware loader refactoring (Michal) - Make shrinking more effective and not stall so much (Chris) - Cannonlake PLL fixes (Rodrigo) - DP MST connector error propagation fixes (James) - Convert timers to use timer_setup (Kees Cook) - Skylake plane enable/disable unification (Juha-Pekka) - Fix to actually free driver internal objects when requested (Chris) - DDI buf trans refactoring (Ville) - Skip waking the device to service pwrite (Chris) - Improve DSI VBT backlight parsing abstraction (Madhav) - Cannonlake VBT DDC pin mapping fix (Rodrigo) * tag 'drm-intel-next-2017-10-23' of git://anongit.freedesktop.org/drm/drm-intel: (87 commits) drm/i915: Update DRIVER_DATE to 20171023 drm/i915/cnl: Map VBT DDC Pin to BSpec DDC Pin. drm/i915: Let's use more enum intel_dpll_id pll_id. drm/i915: Use existing DSI backlight ports info drm/i915: Parse DSI backlight/cabc ports. drm/i915: Skip waking the device to service pwrite drm/i915/crt: split compute_config hook by platforms drm/i915: remove g4x lowfreq_avail and has_pipe_cxsr drm/i915: Drop the redundant hdmi prefix/suffix from a lot of variables drm/i915: Unify error handling for missing DDI buf trans tables drm/i915: Centralize the SKL DDI A/E vs. B/C/D buf trans handling drm/i915: Kill off the BXT buf_trans default_index drm/i915: Pass encoder type to cnl_ddi_vswing_sequence() explicitly drm/i915: Integrate BXT into intel_ddi_dp_voltage_max() drm/i915: Pass the level to intel_prepare_hdmi_ddi_buffers() drm/i915: Pass the encoder type explicitly to skl_set_iboost() drm/i915: Extract intel_ddi_get_buf_trans_hdmi() drm/i915: Relocate intel_ddi_get_buf_trans_*() functions drm/i915: Flush the idle-worker for debugfs/i915_drop_caches drm/i915: adjust get_crtc_fence_y_offset() to use base.y instead of crtc.y ...
Tip revision: 36a5fdf76d3281345e000e115f33817570a76420 authored by Dave Airlie on 03 November 2017, 19:43:44 UTC
Merge tag 'drm-intel-next-2017-10-23' of git://anongit.freedesktop.org/drm/drm-intel into drm-next
Merge tag 'drm-intel-next-2017-10-23' of git://anongit.freedesktop.org/drm/drm-intel into drm-next
Tip revision: 36a5fdf
t10-pi.c
/*
* t10_pi.c - Functions for generating and verifying T10 Protection
* Information.
*
* Copyright (C) 2007, 2008, 2014 Oracle Corporation
* Written by: Martin K. Petersen <martin.petersen@oracle.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.
*
* 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; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139,
* USA.
*
*/
#include <linux/t10-pi.h>
#include <linux/blkdev.h>
#include <linux/crc-t10dif.h>
#include <net/checksum.h>
typedef __be16 (csum_fn) (void *, unsigned int);
static __be16 t10_pi_crc_fn(void *data, unsigned int len)
{
return cpu_to_be16(crc_t10dif(data, len));
}
static __be16 t10_pi_ip_fn(void *data, unsigned int len)
{
return (__force __be16)ip_compute_csum(data, len);
}
/*
* Type 1 and Type 2 protection use the same format: 16 bit guard tag,
* 16 bit app tag, 32 bit reference tag. Type 3 does not define the ref
* tag.
*/
static blk_status_t t10_pi_generate(struct blk_integrity_iter *iter,
csum_fn *fn, unsigned int type)
{
unsigned int i;
for (i = 0 ; i < iter->data_size ; i += iter->interval) {
struct t10_pi_tuple *pi = iter->prot_buf;
pi->guard_tag = fn(iter->data_buf, iter->interval);
pi->app_tag = 0;
if (type == 1)
pi->ref_tag = cpu_to_be32(lower_32_bits(iter->seed));
else
pi->ref_tag = 0;
iter->data_buf += iter->interval;
iter->prot_buf += sizeof(struct t10_pi_tuple);
iter->seed++;
}
return BLK_STS_OK;
}
static blk_status_t t10_pi_verify(struct blk_integrity_iter *iter,
csum_fn *fn, unsigned int type)
{
unsigned int i;
for (i = 0 ; i < iter->data_size ; i += iter->interval) {
struct t10_pi_tuple *pi = iter->prot_buf;
__be16 csum;
switch (type) {
case 1:
case 2:
if (pi->app_tag == T10_PI_APP_ESCAPE)
goto next;
if (be32_to_cpu(pi->ref_tag) !=
lower_32_bits(iter->seed)) {
pr_err("%s: ref tag error at location %llu " \
"(rcvd %u)\n", iter->disk_name,
(unsigned long long)
iter->seed, be32_to_cpu(pi->ref_tag));
return BLK_STS_PROTECTION;
}
break;
case 3:
if (pi->app_tag == T10_PI_APP_ESCAPE &&
pi->ref_tag == T10_PI_REF_ESCAPE)
goto next;
break;
}
csum = fn(iter->data_buf, iter->interval);
if (pi->guard_tag != csum) {
pr_err("%s: guard tag error at sector %llu " \
"(rcvd %04x, want %04x)\n", iter->disk_name,
(unsigned long long)iter->seed,
be16_to_cpu(pi->guard_tag), be16_to_cpu(csum));
return BLK_STS_PROTECTION;
}
next:
iter->data_buf += iter->interval;
iter->prot_buf += sizeof(struct t10_pi_tuple);
iter->seed++;
}
return BLK_STS_OK;
}
static blk_status_t t10_pi_type1_generate_crc(struct blk_integrity_iter *iter)
{
return t10_pi_generate(iter, t10_pi_crc_fn, 1);
}
static blk_status_t t10_pi_type1_generate_ip(struct blk_integrity_iter *iter)
{
return t10_pi_generate(iter, t10_pi_ip_fn, 1);
}
static blk_status_t t10_pi_type1_verify_crc(struct blk_integrity_iter *iter)
{
return t10_pi_verify(iter, t10_pi_crc_fn, 1);
}
static blk_status_t t10_pi_type1_verify_ip(struct blk_integrity_iter *iter)
{
return t10_pi_verify(iter, t10_pi_ip_fn, 1);
}
static blk_status_t t10_pi_type3_generate_crc(struct blk_integrity_iter *iter)
{
return t10_pi_generate(iter, t10_pi_crc_fn, 3);
}
static blk_status_t t10_pi_type3_generate_ip(struct blk_integrity_iter *iter)
{
return t10_pi_generate(iter, t10_pi_ip_fn, 3);
}
static blk_status_t t10_pi_type3_verify_crc(struct blk_integrity_iter *iter)
{
return t10_pi_verify(iter, t10_pi_crc_fn, 3);
}
static blk_status_t t10_pi_type3_verify_ip(struct blk_integrity_iter *iter)
{
return t10_pi_verify(iter, t10_pi_ip_fn, 3);
}
const struct blk_integrity_profile t10_pi_type1_crc = {
.name = "T10-DIF-TYPE1-CRC",
.generate_fn = t10_pi_type1_generate_crc,
.verify_fn = t10_pi_type1_verify_crc,
};
EXPORT_SYMBOL(t10_pi_type1_crc);
const struct blk_integrity_profile t10_pi_type1_ip = {
.name = "T10-DIF-TYPE1-IP",
.generate_fn = t10_pi_type1_generate_ip,
.verify_fn = t10_pi_type1_verify_ip,
};
EXPORT_SYMBOL(t10_pi_type1_ip);
const struct blk_integrity_profile t10_pi_type3_crc = {
.name = "T10-DIF-TYPE3-CRC",
.generate_fn = t10_pi_type3_generate_crc,
.verify_fn = t10_pi_type3_verify_crc,
};
EXPORT_SYMBOL(t10_pi_type3_crc);
const struct blk_integrity_profile t10_pi_type3_ip = {
.name = "T10-DIF-TYPE3-IP",
.generate_fn = t10_pi_type3_generate_ip,
.verify_fn = t10_pi_type3_verify_ip,
};
EXPORT_SYMBOL(t10_pi_type3_ip);
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