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-rw-r--r--lib/Kconfig17
-rw-r--r--lib/Kconfig.debug42
-rw-r--r--lib/Makefile7
-rw-r--r--lib/debugobjects.c11
-rw-r--r--lib/dynamic_debug.c190
-rw-r--r--lib/jedec_ddr_data.c135
-rw-r--r--lib/kobject.c14
-rw-r--r--lib/list_debug.c22
-rw-r--r--lib/mpi/mpi-bit.c5
-rw-r--r--lib/raid6/Makefile2
-rw-r--r--lib/raid6/algos.c127
-rw-r--r--lib/raid6/mktables.c25
-rw-r--r--lib/raid6/recov.c15
-rw-r--r--lib/raid6/recov_ssse3.c335
-rw-r--r--lib/raid6/test/Makefile2
-rw-r--r--lib/raid6/test/test.c32
-rw-r--r--lib/raid6/x86.h15
-rw-r--r--lib/rational.c2
-rw-r--r--lib/stmp_device.c80
-rw-r--r--lib/strncpy_from_user.c113
-rw-r--r--lib/strnlen_user.c138
21 files changed, 1171 insertions, 158 deletions
diff --git a/lib/Kconfig b/lib/Kconfig
index 4a8aba2e5cc0..a9e15403434e 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -16,6 +16,12 @@ config BITREVERSE
config RATIONAL
boolean
+config GENERIC_STRNCPY_FROM_USER
+ bool
+
+config GENERIC_STRNLEN_USER
+ bool
+
config GENERIC_FIND_FIRST_BIT
bool
@@ -33,6 +39,9 @@ config GENERIC_IO
boolean
default n
+config STMP_DEVICE
+ bool
+
config CRC_CCITT
tristate "CRC-CCITT functions"
help
@@ -353,6 +362,14 @@ config CORDIC
This option provides an implementation of the CORDIC algorithm;
calculations are in fixed point. Module will be called cordic.
+config DDR
+ bool "JEDEC DDR data"
+ help
+ Data from JEDEC specs for DDR SDRAM memories,
+ particularly the AC timing parameters and addressing
+ information. This data is useful for drivers handling
+ DDR SDRAM controllers.
+
config MPILIB
tristate
select CLZ_TAB
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 6777153f18f3..a42d3ae39648 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -3,12 +3,16 @@ config PRINTK_TIME
bool "Show timing information on printks"
depends on PRINTK
help
- Selecting this option causes timing information to be
- included in printk output. This allows you to measure
- the interval between kernel operations, including bootup
- operations. This is useful for identifying long delays
- in kernel startup. Or add printk.time=1 at boot-time.
- See Documentation/kernel-parameters.txt
+ Selecting this option causes time stamps of the printk()
+ messages to be added to the output of the syslog() system
+ call and at the console.
+
+ The timestamp is always recorded internally, and exported
+ to /dev/kmsg. This flag just specifies if the timestamp should
+ be included, not that the timestamp is recorded.
+
+ The behavior is also controlled by the kernel command line
+ parameter printk.time=1. See Documentation/kernel-parameters.txt
config DEFAULT_MESSAGE_LOGLEVEL
int "Default message log level (1-7)"
@@ -70,6 +74,15 @@ config STRIP_ASM_SYMS
that look like '.Lxxx') so they don't pollute the output of
get_wchan() and suchlike.
+config READABLE_ASM
+ bool "Generate readable assembler code"
+ depends on DEBUG_KERNEL
+ help
+ Disable some compiler optimizations that tend to generate human unreadable
+ assembler output. This may make the kernel slightly slower, but it helps
+ to keep kernel developers who have to stare a lot at assembler listings
+ sane.
+
config UNUSED_SYMBOLS
bool "Enable unused/obsolete exported symbols"
default y if X86
@@ -1205,8 +1218,13 @@ config DYNAMIC_DEBUG
otherwise be available at runtime. These messages can then be
enabled/disabled based on various levels of scope - per source file,
function, module, format string, and line number. This mechanism
- implicitly enables all pr_debug() and dev_dbg() calls. The impact of
- this compile option is a larger kernel text size of about 2%.
+ implicitly compiles in all pr_debug() and dev_dbg() calls, which
+ enlarges the kernel text size by about 2%.
+
+ If a source file is compiled with DEBUG flag set, any
+ pr_debug() calls in it are enabled by default, but can be
+ disabled at runtime as below. Note that DEBUG flag is
+ turned on by many CONFIG_*DEBUG* options.
Usage:
@@ -1223,16 +1241,16 @@ config DYNAMIC_DEBUG
lineno : line number of the debug statement
module : module that contains the debug statement
function : function that contains the debug statement
- flags : 'p' means the line is turned 'on' for printing
+ flags : '=p' means the line is turned 'on' for printing
format : the format used for the debug statement
From a live system:
nullarbor:~ # cat <debugfs>/dynamic_debug/control
# filename:lineno [module]function flags format
- fs/aio.c:222 [aio]__put_ioctx - "__put_ioctx:\040freeing\040%p\012"
- fs/aio.c:248 [aio]ioctx_alloc - "ENOMEM:\040nr_events\040too\040high\012"
- fs/aio.c:1770 [aio]sys_io_cancel - "calling\040cancel\012"
+ fs/aio.c:222 [aio]__put_ioctx =_ "__put_ioctx:\040freeing\040%p\012"
+ fs/aio.c:248 [aio]ioctx_alloc =_ "ENOMEM:\040nr_events\040too\040high\012"
+ fs/aio.c:1770 [aio]sys_io_cancel =_ "calling\040cancel\012"
Example usage:
diff --git a/lib/Makefile b/lib/Makefile
index 18515f0267c4..8c31a0cb75e9 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -123,6 +123,13 @@ obj-$(CONFIG_SIGNATURE) += digsig.o
obj-$(CONFIG_CLZ_TAB) += clz_tab.o
+obj-$(CONFIG_DDR) += jedec_ddr_data.o
+
+obj-$(CONFIG_GENERIC_STRNCPY_FROM_USER) += strncpy_from_user.o
+obj-$(CONFIG_GENERIC_STRNLEN_USER) += strnlen_user.o
+
+obj-$(CONFIG_STMP_DEVICE) += stmp_device.o
+
hostprogs-y := gen_crc32table
clean-files := crc32table.h
diff --git a/lib/debugobjects.c b/lib/debugobjects.c
index 0ab9ae8057f0..d11808ca4bc4 100644
--- a/lib/debugobjects.c
+++ b/lib/debugobjects.c
@@ -79,30 +79,29 @@ static const char *obj_states[ODEBUG_STATE_MAX] = {
[ODEBUG_STATE_NOTAVAILABLE] = "not available",
};
-static int fill_pool(void)
+static void fill_pool(void)
{
gfp_t gfp = GFP_ATOMIC | __GFP_NORETRY | __GFP_NOWARN;
struct debug_obj *new;
unsigned long flags;
if (likely(obj_pool_free >= ODEBUG_POOL_MIN_LEVEL))
- return obj_pool_free;
+ return;
if (unlikely(!obj_cache))
- return obj_pool_free;
+ return;
while (obj_pool_free < ODEBUG_POOL_MIN_LEVEL) {
new = kmem_cache_zalloc(obj_cache, gfp);
if (!new)
- return obj_pool_free;
+ return;
raw_spin_lock_irqsave(&pool_lock, flags);
hlist_add_head(&new->node, &obj_pool);
obj_pool_free++;
raw_spin_unlock_irqrestore(&pool_lock, flags);
}
- return obj_pool_free;
}
/*
@@ -1052,10 +1051,10 @@ static int __init debug_objects_replace_static_objects(void)
cnt++;
}
}
+ local_irq_enable();
printk(KERN_DEBUG "ODEBUG: %d of %d active objects replaced\n", cnt,
obj_pool_used);
- local_irq_enable();
return 0;
free:
hlist_for_each_entry_safe(obj, node, tmp, &objects, node) {
diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
index 310c753cf83e..7ca29a0a3019 100644
--- a/lib/dynamic_debug.c
+++ b/lib/dynamic_debug.c
@@ -107,20 +107,22 @@ static char *ddebug_describe_flags(struct _ddebug *dp, char *buf,
return buf;
}
-#define vpr_info_dq(q, msg) \
-do { \
- if (verbose) \
- /* trim last char off format print */ \
- pr_info("%s: func=\"%s\" file=\"%s\" " \
- "module=\"%s\" format=\"%.*s\" " \
- "lineno=%u-%u", \
- msg, \
- q->function ? q->function : "", \
- q->filename ? q->filename : "", \
- q->module ? q->module : "", \
- (int)(q->format ? strlen(q->format) - 1 : 0), \
- q->format ? q->format : "", \
- q->first_lineno, q->last_lineno); \
+#define vpr_info(fmt, ...) \
+ if (verbose) do { pr_info(fmt, ##__VA_ARGS__); } while (0)
+
+#define vpr_info_dq(q, msg) \
+do { \
+ /* trim last char off format print */ \
+ vpr_info("%s: func=\"%s\" file=\"%s\" " \
+ "module=\"%s\" format=\"%.*s\" " \
+ "lineno=%u-%u", \
+ msg, \
+ q->function ? q->function : "", \
+ q->filename ? q->filename : "", \
+ q->module ? q->module : "", \
+ (int)(q->format ? strlen(q->format) - 1 : 0), \
+ q->format ? q->format : "", \
+ q->first_lineno, q->last_lineno); \
} while (0)
/*
@@ -180,12 +182,11 @@ static int ddebug_change(const struct ddebug_query *query,
if (newflags == dp->flags)
continue;
dp->flags = newflags;
- if (verbose)
- pr_info("changed %s:%d [%s]%s =%s\n",
- trim_prefix(dp->filename), dp->lineno,
- dt->mod_name, dp->function,
- ddebug_describe_flags(dp, flagbuf,
- sizeof(flagbuf)));
+ vpr_info("changed %s:%d [%s]%s =%s\n",
+ trim_prefix(dp->filename), dp->lineno,
+ dt->mod_name, dp->function,
+ ddebug_describe_flags(dp, flagbuf,
+ sizeof(flagbuf)));
}
}
mutex_unlock(&ddebug_lock);
@@ -337,7 +338,7 @@ static int check_set(const char **dest, char *src, char *name)
* Returns 0 on success, <0 on error.
*/
static int ddebug_parse_query(char *words[], int nwords,
- struct ddebug_query *query)
+ struct ddebug_query *query, const char *modname)
{
unsigned int i;
int rc;
@@ -347,6 +348,10 @@ static int ddebug_parse_query(char *words[], int nwords,
return -EINVAL;
memset(query, 0, sizeof(*query));
+ if (modname)
+ /* support $modname.dyndbg=<multiple queries> */
+ query->module = modname;
+
for (i = 0 ; i < nwords ; i += 2) {
if (!strcmp(words[i], "func"))
rc = check_set(&query->function, words[i+1], "func");
@@ -410,8 +415,7 @@ static int ddebug_parse_flags(const char *str, unsigned int *flagsp,
default:
return -EINVAL;
}
- if (verbose)
- pr_info("op='%c'\n", op);
+ vpr_info("op='%c'\n", op);
for ( ; *str ; ++str) {
for (i = ARRAY_SIZE(opt_array) - 1; i >= 0; i--) {
@@ -423,8 +427,7 @@ static int ddebug_parse_flags(const char *str, unsigned int *flagsp,
if (i < 0)
return -EINVAL;
}
- if (verbose)
- pr_info("flags=0x%x\n", flags);
+ vpr_info("flags=0x%x\n", flags);
/* calculate final *flagsp, *maskp according to mask and op */
switch (op) {
@@ -441,12 +444,11 @@ static int ddebug_parse_flags(const char *str, unsigned int *flagsp,
*flagsp = 0;
break;
}
- if (verbose)
- pr_info("*flagsp=0x%x *maskp=0x%x\n", *flagsp, *maskp);
+ vpr_info("*flagsp=0x%x *maskp=0x%x\n", *flagsp, *maskp);
return 0;
}
-static int ddebug_exec_query(char *query_string)
+static int ddebug_exec_query(char *query_string, const char *modname)
{
unsigned int flags = 0, mask = 0;
struct ddebug_query query;
@@ -457,7 +459,7 @@ static int ddebug_exec_query(char *query_string)
nwords = ddebug_tokenize(query_string, words, MAXWORDS);
if (nwords <= 0)
return -EINVAL;
- if (ddebug_parse_query(words, nwords-1, &query))
+ if (ddebug_parse_query(words, nwords-1, &query, modname))
return -EINVAL;
if (ddebug_parse_flags(words[nwords-1], &flags, &mask))
return -EINVAL;
@@ -473,7 +475,7 @@ static int ddebug_exec_query(char *query_string)
last error or number of matching callsites. Module name is either
in param (for boot arg) or perhaps in query string.
*/
-static int ddebug_exec_queries(char *query)
+static int ddebug_exec_queries(char *query, const char *modname)
{
char *split;
int i, errs = 0, exitcode = 0, rc, nfound = 0;
@@ -487,10 +489,9 @@ static int ddebug_exec_queries(char *query)
if (!query || !*query || *query == '#')
continue;
- if (verbose)
- pr_info("query %d: \"%s\"\n", i, query);
+ vpr_info("query %d: \"%s\"\n", i, query);
- rc = ddebug_exec_query(query);
+ rc = ddebug_exec_query(query, modname);
if (rc < 0) {
errs++;
exitcode = rc;
@@ -498,7 +499,7 @@ static int ddebug_exec_queries(char *query)
nfound += rc;
i++;
}
- pr_info("processed %d queries, with %d matches, %d errs\n",
+ vpr_info("processed %d queries, with %d matches, %d errs\n",
i, nfound, errs);
if (exitcode)
@@ -653,10 +654,9 @@ static ssize_t ddebug_proc_write(struct file *file, const char __user *ubuf,
return -EFAULT;
}
tmpbuf[len] = '\0';
- if (verbose)
- pr_info("read %d bytes from userspace\n", (int)len);
+ vpr_info("read %d bytes from userspace\n", (int)len);
- ret = ddebug_exec_queries(tmpbuf);
+ ret = ddebug_exec_queries(tmpbuf, NULL);
kfree(tmpbuf);
if (ret < 0)
return ret;
@@ -717,8 +717,7 @@ static void *ddebug_proc_start(struct seq_file *m, loff_t *pos)
struct _ddebug *dp;
int n = *pos;
- if (verbose)
- pr_info("called m=%p *pos=%lld\n", m, (unsigned long long)*pos);
+ vpr_info("called m=%p *pos=%lld\n", m, (unsigned long long)*pos);
mutex_lock(&ddebug_lock);
@@ -742,9 +741,8 @@ static void *ddebug_proc_next(struct seq_file *m, void *p, loff_t *pos)
struct ddebug_iter *iter = m->private;
struct _ddebug *dp;
- if (verbose)
- pr_info("called m=%p p=%p *pos=%lld\n",
- m, p, (unsigned long long)*pos);
+ vpr_info("called m=%p p=%p *pos=%lld\n",
+ m, p, (unsigned long long)*pos);
if (p == SEQ_START_TOKEN)
dp = ddebug_iter_first(iter);
@@ -766,8 +764,7 @@ static int ddebug_proc_show(struct seq_file *m, void *p)
struct _ddebug *dp = p;
char flagsbuf[10];
- if (verbose)
- pr_info("called m=%p p=%p\n", m, p);
+ vpr_info("called m=%p p=%p\n", m, p);
if (p == SEQ_START_TOKEN) {
seq_puts(m,
@@ -791,8 +788,7 @@ static int ddebug_proc_show(struct seq_file *m, void *p)
*/
static void ddebug_proc_stop(struct seq_file *m, void *p)
{
- if (verbose)
- pr_info("called m=%p p=%p\n", m, p);
+ vpr_info("called m=%p p=%p\n", m, p);
mutex_unlock(&ddebug_lock);
}
@@ -815,8 +811,7 @@ static int ddebug_proc_open(struct inode *inode, struct file *file)
struct ddebug_iter *iter;
int err;
- if (verbose)
- pr_info("called\n");
+ vpr_info("called\n");
iter = kzalloc(sizeof(*iter), GFP_KERNEL);
if (iter == NULL)
@@ -866,12 +861,51 @@ int ddebug_add_module(struct _ddebug *tab, unsigned int n,
list_add_tail(&dt->link, &ddebug_tables);
mutex_unlock(&ddebug_lock);
- if (verbose)
- pr_info("%u debug prints in module %s\n", n, dt->mod_name);
+ vpr_info("%u debug prints in module %s\n", n, dt->mod_name);
return 0;
}
EXPORT_SYMBOL_GPL(ddebug_add_module);
+/* helper for ddebug_dyndbg_(boot|module)_param_cb */
+static int ddebug_dyndbg_param_cb(char *param, char *val,
+ const char *modname, int on_err)
+{
+ char *sep;
+
+ sep = strchr(param, '.');
+ if (sep) {
+ /* needed only for ddebug_dyndbg_boot_param_cb */
+ *sep = '\0';
+ modname = param;
+ param = sep + 1;
+ }
+ if (strcmp(param, "dyndbg"))
+ return on_err; /* determined by caller */
+
+ ddebug_exec_queries((val ? val : "+p"), modname);
+
+ return 0; /* query failure shouldnt stop module load */
+}
+
+/* handle both dyndbg and $module.dyndbg params at boot */
+static int ddebug_dyndbg_boot_param_cb(char *param, char *val,
+ const char *unused)
+{
+ vpr_info("%s=\"%s\"\n", param, val);
+ return ddebug_dyndbg_param_cb(param, val, NULL, 0);
+}
+
+/*
+ * modprobe foo finds foo.params in boot-args, strips "foo.", and
+ * passes them to load_module(). This callback gets unknown params,
+ * processes dyndbg params, rejects others.
+ */
+int ddebug_dyndbg_module_param_cb(char *param, char *val, const char *module)
+{
+ vpr_info("module: %s %s=\"%s\"\n", module, param, val);
+ return ddebug_dyndbg_param_cb(param, val, module, -ENOENT);
+}
+
static void ddebug_table_free(struct ddebug_table *dt)
{
list_del_init(&dt->link);
@@ -888,8 +922,7 @@ int ddebug_remove_module(const char *mod_name)
struct ddebug_table *dt, *nextdt;
int ret = -ENOENT;
- if (verbose)
- pr_info("removing module \"%s\"\n", mod_name);
+ vpr_info("removing module \"%s\"\n", mod_name);
mutex_lock(&ddebug_lock);
list_for_each_entry_safe(dt, nextdt, &ddebug_tables, link) {
@@ -940,8 +973,10 @@ static int __init dynamic_debug_init(void)
{
struct _ddebug *iter, *iter_start;
const char *modname = NULL;
+ char *cmdline;
int ret = 0;
- int n = 0;
+ int n = 0, entries = 0, modct = 0;
+ int verbose_bytes = 0;
if (__start___verbose == __stop___verbose) {
pr_warn("_ddebug table is empty in a "
@@ -952,10 +987,15 @@ static int __init dynamic_debug_init(void)
modname = iter->modname;
iter_start = iter;
for (; iter < __stop___verbose; iter++) {
+ entries++;
+ verbose_bytes += strlen(iter->modname) + strlen(iter->function)
+ + strlen(iter->filename) + strlen(iter->format);
+
if (strcmp(modname, iter->modname)) {
+ modct++;
ret = ddebug_add_module(iter_start, n, modname);
if (ret)
- goto out_free;
+ goto out_err;
n = 0;
modname = iter->modname;
iter_start = iter;
@@ -964,29 +1004,45 @@ static int __init dynamic_debug_init(void)
}
ret = ddebug_add_module(iter_start, n, modname);
if (ret)
- goto out_free;
+ goto out_err;
+
+ ddebug_init_success = 1;
+ vpr_info("%d modules, %d entries and %d bytes in ddebug tables,"
+ " %d bytes in (readonly) verbose section\n",
+ modct, entries, (int)( modct * sizeof(struct ddebug_table)),
+ verbose_bytes + (int)(__stop___verbose - __start___verbose));
- /* ddebug_query boot param got passed -> set it up */
+ /* apply ddebug_query boot param, dont unload tables on err */
if (ddebug_setup_string[0] != '\0') {
- ret = ddebug_exec_queries(ddebug_setup_string);
+ pr_warn("ddebug_query param name is deprecated,"
+ " change it to dyndbg\n");
+ ret = ddebug_exec_queries(ddebug_setup_string, NULL);
if (ret < 0)
pr_warn("Invalid ddebug boot param %s",
ddebug_setup_string);
else
pr_info("%d changes by ddebug_query\n", ret);
-
- /* keep tables even on ddebug_query parse error */
- ret = 0;
}
+ /* now that ddebug tables are loaded, process all boot args
+ * again to find and activate queries given in dyndbg params.
+ * While this has already been done for known boot params, it
+ * ignored the unknown ones (dyndbg in particular). Reusing
+ * parse_args avoids ad-hoc parsing. This will also attempt
+ * to activate queries for not-yet-loaded modules, which is
+ * slightly noisy if verbose, but harmless.
+ */
+ cmdline = kstrdup(saved_command_line, GFP_KERNEL);
+ parse_args("dyndbg params", cmdline, NULL,
+ 0, 0, 0, &ddebug_dyndbg_boot_param_cb);
+ kfree(cmdline);
+ return 0;
-out_free:
- if (ret)
- ddebug_remove_all_tables();
- else
- ddebug_init_success = 1;
+out_err:
+ ddebug_remove_all_tables();
return 0;
}
/* Allow early initialization for boot messages via boot param */
-arch_initcall(dynamic_debug_init);
+early_initcall(dynamic_debug_init);
+
/* Debugfs setup must be done later */
-module_init(dynamic_debug_init_debugfs);
+fs_initcall(dynamic_debug_init_debugfs);
diff --git a/lib/jedec_ddr_data.c b/lib/jedec_ddr_data.c
new file mode 100644
index 000000000000..6d2cbf1d567f
--- /dev/null
+++ b/lib/jedec_ddr_data.c
@@ -0,0 +1,135 @@
+/*
+ * DDR addressing details and AC timing parameters from JEDEC specs
+ *
+ * Copyright (C) 2012 Texas Instruments, Inc.
+ *
+ * Aneesh V <aneesh@ti.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 <memory/jedec_ddr.h>
+#include <linux/module.h>
+
+/* LPDDR2 addressing details from JESD209-2 section 2.4 */
+const struct lpddr2_addressing
+ lpddr2_jedec_addressing_table[NUM_DDR_ADDR_TABLE_ENTRIES] = {
+ {B4, T_REFI_15_6, T_RFC_90}, /* 64M */
+ {B4, T_REFI_15_6, T_RFC_90}, /* 128M */
+ {B4, T_REFI_7_8, T_RFC_90}, /* 256M */
+ {B4, T_REFI_7_8, T_RFC_90}, /* 512M */
+ {B8, T_REFI_7_8, T_RFC_130}, /* 1GS4 */
+ {B8, T_REFI_3_9, T_RFC_130}, /* 2GS4 */
+ {B8, T_REFI_3_9, T_RFC_130}, /* 4G */
+ {B8, T_REFI_3_9, T_RFC_210}, /* 8G */
+ {B4, T_REFI_7_8, T_RFC_130}, /* 1GS2 */
+ {B4, T_REFI_3_9, T_RFC_130}, /* 2GS2 */
+};
+EXPORT_SYMBOL_GPL(lpddr2_jedec_addressing_table);
+
+/* LPDDR2 AC timing parameters from JESD209-2 section 12 */
+const struct lpddr2_timings
+ lpddr2_jedec_timings[NUM_DDR_TIMING_TABLE_ENTRIES] = {
+ /* Speed bin 400(200 MHz) */
+ [0] = {
+ .max_freq = 200000000,
+ .min_freq = 10000000,
+ .tRPab = 21000,
+ .tRCD = 18000,
+ .tWR = 15000,
+ .tRAS_min = 42000,
+ .tRRD = 10000,
+ .tWTR = 10000,
+ .tXP = 7500,
+ .tRTP = 7500,
+ .tCKESR = 15000,
+ .tDQSCK_max = 5500,
+ .tFAW = 50000,
+ .tZQCS = 90000,
+ .tZQCL = 360000,
+ .tZQinit = 1000000,
+ .tRAS_max_ns = 70000,
+ .tDQSCK_max_derated = 6000,
+ },
+ /* Speed bin 533(266 MHz) */
+ [1] = {
+ .max_freq = 266666666,
+ .min_freq = 10000000,
+ .tRPab = 21000,
+ .tRCD = 18000,
+ .tWR = 15000,
+ .tRAS_min = 42000,
+ .tRRD = 10000,
+ .tWTR = 7500,
+ .tXP = 7500,
+ .tRTP = 7500,
+ .tCKESR = 15000,
+ .tDQSCK_max = 5500,
+ .tFAW = 50000,
+ .tZQCS = 90000,
+ .tZQCL = 360000,
+ .tZQinit = 1000000,
+ .tRAS_max_ns = 70000,
+ .tDQSCK_max_derated = 6000,
+ },
+ /* Speed bin 800(400 MHz) */
+ [2] = {
+ .max_freq = 400000000,
+ .min_freq = 10000000,
+ .tRPab = 21000,
+ .tRCD = 18000,
+ .tWR = 15000,
+ .tRAS_min = 42000,
+ .tRRD = 10000,
+ .tWTR = 7500,
+ .tXP = 7500,
+ .tRTP = 7500,
+ .tCKESR = 15000,
+ .tDQSCK_max = 5500,
+ .tFAW = 50000,
+ .tZQCS = 90000,
+ .tZQCL = 360000,
+ .tZQinit = 1000000,
+ .tRAS_max_ns = 70000,
+ .tDQSCK_max_derated = 6000,
+ },
+ /* Speed bin 1066(533 MHz) */
+ [3] = {
+ .max_freq = 533333333,
+ .min_freq = 10000000,
+ .tRPab = 21000,
+ .tRCD = 18000,
+ .tWR = 15000,
+ .tRAS_min = 42000,
+ .tRRD = 10000,
+ .tWTR = 7500,
+ .tXP = 7500,
+ .tRTP = 7500,
+ .tCKESR = 15000,
+ .tDQSCK_max = 5500,
+ .tFAW = 50000,
+ .tZQCS = 90000,
+ .tZQCL = 360000,
+ .tZQinit = 1000000,
+ .tRAS_max_ns = 70000,
+ .tDQSCK_max_derated = 5620,
+ },
+};
+EXPORT_SYMBOL_GPL(lpddr2_jedec_timings);
+
+const struct lpddr2_min_tck lpddr2_jedec_min_tck = {
+ .tRPab = 3,
+ .tRCD = 3,
+ .tWR = 3,
+ .tRASmin = 3,
+ .tRRD = 2,
+ .tWTR = 2,
+ .tXP = 2,
+ .tRTP = 2,
+ .tCKE = 3,
+ .tCKESR = 3,
+ .tFAW = 8
+};
+EXPORT_SYMBOL_GPL(lpddr2_jedec_min_tck);
diff --git a/lib/kobject.c b/lib/kobject.c
index aeefa8bc8b1c..e07ee1fcd6f1 100644
--- a/lib/kobject.c
+++ b/lib/kobject.c
@@ -47,13 +47,11 @@ static int populate_dir(struct kobject *kobj)
static int create_dir(struct kobject *kobj)
{
int error = 0;
- if (kobject_name(kobj)) {
- error = sysfs_create_dir(kobj);
- if (!error) {
- error = populate_dir(kobj);
- if (error)
- sysfs_remove_dir(kobj);
- }
+ error = sysfs_create_dir(kobj);
+ if (!error) {
+ error = populate_dir(kobj);
+ if (error)
+ sysfs_remove_dir(kobj);
}
return error;
}
@@ -634,7 +632,7 @@ struct kobject *kobject_create(void)
/**
* kobject_create_and_add - create a struct kobject dynamically and register it with sysfs
*
- * @name: the name for the kset
+ * @name: the name for the kobject
* @parent: the parent kobject of this kobject, if any.
*
* This function creates a kobject structure dynamically and registers it
diff --git a/lib/list_debug.c b/lib/list_debug.c
index 982b850d4e7a..3810b481f940 100644
--- a/lib/list_debug.c
+++ b/lib/list_debug.c
@@ -10,6 +10,7 @@
#include <linux/list.h>
#include <linux/bug.h>
#include <linux/kernel.h>
+#include <linux/rculist.h>
/*
* Insert a new entry between two known consecutive entries.
@@ -75,3 +76,24 @@ void list_del(struct list_head *entry)
entry->prev = LIST_POISON2;
}
EXPORT_SYMBOL(list_del);
+
+/*
+ * RCU variants.
+ */
+void __list_add_rcu(struct list_head *new,
+ struct list_head *prev, struct list_head *next)
+{
+ WARN(next->prev != prev,
+ "list_add_rcu corruption. next->prev should be "
+ "prev (%p), but was %p. (next=%p).\n",
+ prev, next->prev, next);
+ WARN(prev->next != next,
+ "list_add_rcu corruption. prev->next should be "
+ "next (%p), but was %p. (prev=%p).\n",
+ next, prev->next, prev);
+ new->next = next;
+ new->prev = prev;
+ rcu_assign_pointer(list_next_rcu(prev), new);
+ next->prev = new;
+}
+EXPORT_SYMBOL(__list_add_rcu);
diff --git a/lib/mpi/mpi-bit.c b/lib/mpi/mpi-bit.c
index 2f526627e4f5..0c505361da19 100644
--- a/lib/mpi/mpi-bit.c
+++ b/lib/mpi/mpi-bit.c
@@ -177,8 +177,8 @@ int mpi_rshift(MPI x, MPI a, unsigned n)
*/
int mpi_lshift_limbs(MPI a, unsigned int count)
{
- mpi_ptr_t ap = a->d;
- int n = a->nlimbs;
+ const int n = a->nlimbs;
+ mpi_ptr_t ap;
int i;
if (!count || !n)
@@ -187,6 +187,7 @@ int mpi_lshift_limbs(MPI a, unsigned int count)
if (RESIZE_IF_NEEDED(a, n + count) < 0)
return -ENOMEM;
+ ap = a->d;
for (i = n - 1; i >= 0; i--)
ap[i + count] = ap[i];
for (i = 0; i < count; i++)
diff --git a/lib/raid6/Makefile b/lib/raid6/Makefile
index 8a38102770f3..de06dfe165b8 100644
--- a/lib/raid6/Makefile
+++ b/lib/raid6/Makefile
@@ -1,6 +1,6 @@
obj-$(CONFIG_RAID6_PQ) += raid6_pq.o
-raid6_pq-y += algos.o recov.o tables.o int1.o int2.o int4.o \
+raid6_pq-y += algos.o recov.o recov_ssse3.o tables.o int1.o int2.o int4.o \
int8.o int16.o int32.o altivec1.o altivec2.o altivec4.o \
altivec8.o mmx.o sse1.o sse2.o
hostprogs-y += mktables
diff --git a/lib/raid6/algos.c b/lib/raid6/algos.c
index 8b02f60ffc86..589f5f50ad2e 100644
--- a/lib/raid6/algos.c
+++ b/lib/raid6/algos.c
@@ -17,11 +17,11 @@
*/
#include <linux/raid/pq.h>
-#include <linux/module.h>
#ifndef __KERNEL__
#include <sys/mman.h>
#include <stdio.h>
#else
+#include <linux/module.h>
#include <linux/gfp.h>
#if !RAID6_USE_EMPTY_ZERO_PAGE
/* In .bss so it's zeroed */
@@ -34,10 +34,6 @@ struct raid6_calls raid6_call;
EXPORT_SYMBOL_GPL(raid6_call);
const struct raid6_calls * const raid6_algos[] = {
- &raid6_intx1,
- &raid6_intx2,
- &raid6_intx4,
- &raid6_intx8,
#if defined(__ia64__)
&raid6_intx16,
&raid6_intx32,
@@ -61,6 +57,24 @@ const struct raid6_calls * const raid6_algos[] = {
&raid6_altivec4,
&raid6_altivec8,
#endif
+ &raid6_intx1,
+ &raid6_intx2,
+ &raid6_intx4,
+ &raid6_intx8,
+ NULL
+};
+
+void (*raid6_2data_recov)(int, size_t, int, int, void **);
+EXPORT_SYMBOL_GPL(raid6_2data_recov);
+
+void (*raid6_datap_recov)(int, size_t, int, void **);
+EXPORT_SYMBOL_GPL(raid6_datap_recov);
+
+const struct raid6_recov_calls *const raid6_recov_algos[] = {
+#if (defined(__i386__) || defined(__x86_64__)) && !defined(__arch_um__)
+ &raid6_recov_ssse3,
+#endif
+ &raid6_recov_intx1,
NULL
};
@@ -72,59 +86,55 @@ const struct raid6_calls * const raid6_algos[] = {
#define time_before(x, y) ((x) < (y))
#endif
-/* Try to pick the best algorithm */
-/* This code uses the gfmul table as convenient data set to abuse */
-
-int __init raid6_select_algo(void)
+static inline const struct raid6_recov_calls *raid6_choose_recov(void)
{
- const struct raid6_calls * const * algo;
- const struct raid6_calls * best;
- char *syndromes;
- void *dptrs[(65536/PAGE_SIZE)+2];
- int i, disks;
- unsigned long perf, bestperf;
- int bestprefer;
- unsigned long j0, j1;
+ const struct raid6_recov_calls *const *algo;
+ const struct raid6_recov_calls *best;
- disks = (65536/PAGE_SIZE)+2;
- for ( i = 0 ; i < disks-2 ; i++ ) {
- dptrs[i] = ((char *)raid6_gfmul) + PAGE_SIZE*i;
- }
+ for (best = NULL, algo = raid6_recov_algos; *algo; algo++)
+ if (!best || (*algo)->priority > best->priority)
+ if (!(*algo)->valid || (*algo)->valid())
+ best = *algo;
- /* Normal code - use a 2-page allocation to avoid D$ conflict */
- syndromes = (void *) __get_free_pages(GFP_KERNEL, 1);
+ if (best) {
+ raid6_2data_recov = best->data2;
+ raid6_datap_recov = best->datap;
- if ( !syndromes ) {
- printk("raid6: Yikes! No memory available.\n");
- return -ENOMEM;
- }
+ printk("raid6: using %s recovery algorithm\n", best->name);
+ } else
+ printk("raid6: Yikes! No recovery algorithm found!\n");
- dptrs[disks-2] = syndromes;
- dptrs[disks-1] = syndromes + PAGE_SIZE;
+ return best;
+}
+
+static inline const struct raid6_calls *raid6_choose_gen(
+ void *(*const dptrs)[(65536/PAGE_SIZE)+2], const int disks)
+{
+ unsigned long perf, bestperf, j0, j1;
+ const struct raid6_calls *const *algo;
+ const struct raid6_calls *best;
- bestperf = 0; bestprefer = 0; best = NULL;
+ for (bestperf = 0, best = NULL, algo = raid6_algos; *algo; algo++) {
+ if (!best || (*algo)->prefer >= best->prefer) {
+ if ((*algo)->valid && !(*algo)->valid())
+ continue;
- for ( algo = raid6_algos ; *algo ; algo++ ) {
- if ( !(*algo)->valid || (*algo)->valid() ) {
perf = 0;
preempt_disable();
j0 = jiffies;
- while ( (j1 = jiffies) == j0 )
+ while ((j1 = jiffies) == j0)
cpu_relax();
while (time_before(jiffies,
j1 + (1<<RAID6_TIME_JIFFIES_LG2))) {
- (*algo)->gen_syndrome(disks, PAGE_SIZE, dptrs);
+ (*algo)->gen_syndrome(disks, PAGE_SIZE, *dptrs);
perf++;
}
preempt_enable();
- if ( (*algo)->prefer > bestprefer ||
- ((*algo)->prefer == bestprefer &&
- perf > bestperf) ) {
- best = *algo;
- bestprefer = best->prefer;
+ if (perf > bestperf) {
bestperf = perf;
+ best = *algo;
}
printk("raid6: %-8s %5ld MB/s\n", (*algo)->name,
(perf*HZ) >> (20-16+RAID6_TIME_JIFFIES_LG2));
@@ -139,9 +149,46 @@ int __init raid6_select_algo(void)
} else
printk("raid6: Yikes! No algorithm found!\n");
+ return best;
+}
+
+
+/* Try to pick the best algorithm */
+/* This code uses the gfmul table as convenient data set to abuse */
+
+int __init raid6_select_algo(void)
+{
+ const int disks = (65536/PAGE_SIZE)+2;
+
+ const struct raid6_calls *gen_best;
+ const struct raid6_recov_calls *rec_best;
+ char *syndromes;
+ void *dptrs[(65536/PAGE_SIZE)+2];
+ int i;
+
+ for (i = 0; i < disks-2; i++)
+ dptrs[i] = ((char *)raid6_gfmul) + PAGE_SIZE*i;
+
+ /* Normal code - use a 2-page allocation to avoid D$ conflict */
+ syndromes = (void *) __get_free_pages(GFP_KERNEL, 1);
+
+ if (!syndromes) {
+ printk("raid6: Yikes! No memory available.\n");
+ return -ENOMEM;
+ }
+
+ dptrs[disks-2] = syndromes;
+ dptrs[disks-1] = syndromes + PAGE_SIZE;
+
+ /* select raid gen_syndrome function */
+ gen_best = raid6_choose_gen(&dptrs, disks);
+
+ /* select raid recover functions */
+ rec_best = raid6_choose_recov();
+
free_pages((unsigned long)syndromes, 1);
- return best ? 0 : -EINVAL;
+ return gen_best && rec_best ? 0 : -EINVAL;
}
static void raid6_exit(void)
diff --git a/lib/raid6/mktables.c b/lib/raid6/mktables.c
index 8a3780902cec..39787db588b0 100644
--- a/lib/raid6/mktables.c
+++ b/lib/raid6/mktables.c
@@ -81,6 +81,31 @@ int main(int argc, char *argv[])
printf("EXPORT_SYMBOL(raid6_gfmul);\n");
printf("#endif\n");
+ /* Compute vector multiplication table */
+ printf("\nconst u8 __attribute__((aligned(256)))\n"
+ "raid6_vgfmul[256][32] =\n"
+ "{\n");
+ for (i = 0; i < 256; i++) {
+ printf("\t{\n");
+ for (j = 0; j < 16; j += 8) {
+ printf("\t\t");
+ for (k = 0; k < 8; k++)
+ printf("0x%02x,%c", gfmul(i, j + k),
+ (k == 7) ? '\n' : ' ');
+ }
+ for (j = 0; j < 16; j += 8) {
+ printf("\t\t");
+ for (k = 0; k < 8; k++)
+ printf("0x%02x,%c", gfmul(i, (j + k) << 4),
+ (k == 7) ? '\n' : ' ');
+ }
+ printf("\t},\n");
+ }
+ printf("};\n");
+ printf("#ifdef __KERNEL__\n");
+ printf("EXPORT_SYMBOL(raid6_vgfmul);\n");
+ printf("#endif\n");
+
/* Compute power-of-2 table (exponent) */
v = 1;
printf("\nconst u8 __attribute__((aligned(256)))\n"
diff --git a/lib/raid6/recov.c b/lib/raid6/recov.c
index fe275d7b6b36..1805a5cc5daa 100644
--- a/lib/raid6/recov.c
+++ b/lib/raid6/recov.c
@@ -22,7 +22,7 @@
#include <linux/raid/pq.h>
/* Recover two failed data blocks. */
-void raid6_2data_recov(int disks, size_t bytes, int faila, int failb,
+void raid6_2data_recov_intx1(int disks, size_t bytes, int faila, int failb,
void **ptrs)
{
u8 *p, *q, *dp, *dq;
@@ -64,10 +64,9 @@ void raid6_2data_recov(int disks, size_t bytes, int faila, int failb,
p++; q++;
}
}
-EXPORT_SYMBOL_GPL(raid6_2data_recov);
/* Recover failure of one data block plus the P block */
-void raid6_datap_recov(int disks, size_t bytes, int faila, void **ptrs)
+void raid6_datap_recov_intx1(int disks, size_t bytes, int faila, void **ptrs)
{
u8 *p, *q, *dq;
const u8 *qmul; /* Q multiplier table */
@@ -96,7 +95,15 @@ void raid6_datap_recov(int disks, size_t bytes, int faila, void **ptrs)
q++; dq++;
}
}
-EXPORT_SYMBOL_GPL(raid6_datap_recov);
+
+
+const struct raid6_recov_calls raid6_recov_intx1 = {
+ .data2 = raid6_2data_recov_intx1,
+ .datap = raid6_datap_recov_intx1,
+ .valid = NULL,
+ .name = "intx1",
+ .priority = 0,
+};
#ifndef __KERNEL__
/* Testing only */
diff --git a/lib/raid6/recov_ssse3.c b/lib/raid6/recov_ssse3.c
new file mode 100644
index 000000000000..37ae61930559
--- /dev/null
+++ b/lib/raid6/recov_ssse3.c
@@ -0,0 +1,335 @@
+/*
+ * Copyright (C) 2012 Intel Corporation
+ *
+ * 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; version 2
+ * of the License.
+ */
+
+#if (defined(__i386__) || defined(__x86_64__)) && !defined(__arch_um__)
+
+#include <linux/raid/pq.h>
+#include "x86.h"
+
+static int raid6_has_ssse3(void)
+{
+ return boot_cpu_has(X86_FEATURE_XMM) &&
+ boot_cpu_has(X86_FEATURE_XMM2) &&
+ boot_cpu_has(X86_FEATURE_SSSE3);
+}
+
+void raid6_2data_recov_ssse3(int disks, size_t bytes, int faila, int failb,
+ void **ptrs)
+{
+ u8 *p, *q, *dp, *dq;
+ const u8 *pbmul; /* P multiplier table for B data */
+ const u8 *qmul; /* Q multiplier table (for both) */
+ static const u8 __aligned(16) x0f[16] = {
+ 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f,
+ 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f};
+
+ p = (u8 *)ptrs[disks-2];
+ q = (u8 *)ptrs[disks-1];
+
+ /* Compute syndrome with zero for the missing data pages
+ Use the dead data pages as temporary storage for
+ delta p and delta q */
+ dp = (u8 *)ptrs[faila];
+ ptrs[faila] = (void *)raid6_empty_zero_page;
+ ptrs[disks-2] = dp;
+ dq = (u8 *)ptrs[failb];
+ ptrs[failb] = (void *)raid6_empty_zero_page;
+ ptrs[disks-1] = dq;
+
+ raid6_call.gen_syndrome(disks, bytes, ptrs);
+
+ /* Restore pointer table */
+ ptrs[faila] = dp;
+ ptrs[failb] = dq;
+ ptrs[disks-2] = p;
+ ptrs[disks-1] = q;
+
+ /* Now, pick the proper data tables */
+ pbmul = raid6_vgfmul[raid6_gfexi[failb-faila]];
+ qmul = raid6_vgfmul[raid6_gfinv[raid6_gfexp[faila] ^
+ raid6_gfexp[failb]]];
+
+ kernel_fpu_begin();
+
+ asm volatile("movdqa %0,%%xmm7" : : "m" (x0f[0]));
+
+#ifdef CONFIG_X86_64
+ asm volatile("movdqa %0,%%xmm6" : : "m" (qmul[0]));
+ asm volatile("movdqa %0,%%xmm14" : : "m" (pbmul[0]));
+ asm volatile("movdqa %0,%%xmm15" : : "m" (pbmul[16]));
+#endif
+
+ /* Now do it... */
+ while (bytes) {
+#ifdef CONFIG_X86_64
+ /* xmm6, xmm14, xmm15 */
+
+ asm volatile("movdqa %0,%%xmm1" : : "m" (q[0]));
+ asm volatile("movdqa %0,%%xmm9" : : "m" (q[16]));
+ asm volatile("movdqa %0,%%xmm0" : : "m" (p[0]));
+ asm volatile("movdqa %0,%%xmm8" : : "m" (p[16]));
+ asm volatile("pxor %0,%%xmm1" : : "m" (dq[0]));
+ asm volatile("pxor %0,%%xmm9" : : "m" (dq[16]));
+ asm volatile("pxor %0,%%xmm0" : : "m" (dp[0]));
+ asm volatile("pxor %0,%%xmm8" : : "m" (dp[16]));
+
+ /* xmm0/8 = px */
+
+ asm volatile("movdqa %xmm6,%xmm4");
+ asm volatile("movdqa %0,%%xmm5" : : "m" (qmul[16]));
+ asm volatile("movdqa %xmm6,%xmm12");
+ asm volatile("movdqa %xmm5,%xmm13");
+ asm volatile("movdqa %xmm1,%xmm3");
+ asm volatile("movdqa %xmm9,%xmm11");
+ asm volatile("movdqa %xmm0,%xmm2"); /* xmm2/10 = px */
+ asm volatile("movdqa %xmm8,%xmm10");
+ asm volatile("psraw $4,%xmm1");
+ asm volatile("psraw $4,%xmm9");
+ asm volatile("pand %xmm7,%xmm3");
+ asm volatile("pand %xmm7,%xmm11");
+ asm volatile("pand %xmm7,%xmm1");
+ asm volatile("pand %xmm7,%xmm9");
+ asm volatile("pshufb %xmm3,%xmm4");
+ asm volatile("pshufb %xmm11,%xmm12");
+ asm volatile("pshufb %xmm1,%xmm5");
+ asm volatile("pshufb %xmm9,%xmm13");
+ asm volatile("pxor %xmm4,%xmm5");
+ asm volatile("pxor %xmm12,%xmm13");
+
+ /* xmm5/13 = qx */
+
+ asm volatile("movdqa %xmm14,%xmm4");
+ asm volatile("movdqa %xmm15,%xmm1");
+ asm volatile("movdqa %xmm14,%xmm12");
+ asm volatile("movdqa %xmm15,%xmm9");
+ asm volatile("movdqa %xmm2,%xmm3");
+ asm volatile("movdqa %xmm10,%xmm11");
+ asm volatile("psraw $4,%xmm2");
+ asm volatile("psraw $4,%xmm10");
+ asm volatile("pand %xmm7,%xmm3");
+ asm volatile("pand %xmm7,%xmm11");
+ asm volatile("pand %xmm7,%xmm2");
+ asm volatile("pand %xmm7,%xmm10");
+ asm volatile("pshufb %xmm3,%xmm4");
+ asm volatile("pshufb %xmm11,%xmm12");
+ asm volatile("pshufb %xmm2,%xmm1");
+ asm volatile("pshufb %xmm10,%xmm9");
+ asm volatile("pxor %xmm4,%xmm1");
+ asm volatile("pxor %xmm12,%xmm9");
+
+ /* xmm1/9 = pbmul[px] */
+ asm volatile("pxor %xmm5,%xmm1");
+ asm volatile("pxor %xmm13,%xmm9");
+ /* xmm1/9 = db = DQ */
+ asm volatile("movdqa %%xmm1,%0" : "=m" (dq[0]));
+ asm volatile("movdqa %%xmm9,%0" : "=m" (dq[16]));
+
+ asm volatile("pxor %xmm1,%xmm0");
+ asm volatile("pxor %xmm9,%xmm8");
+ asm volatile("movdqa %%xmm0,%0" : "=m" (dp[0]));
+ asm volatile("movdqa %%xmm8,%0" : "=m" (dp[16]));
+
+ bytes -= 32;
+ p += 32;
+ q += 32;
+ dp += 32;
+ dq += 32;
+#else
+ asm volatile("movdqa %0,%%xmm1" : : "m" (*q));
+ asm volatile("movdqa %0,%%xmm0" : : "m" (*p));
+ asm volatile("pxor %0,%%xmm1" : : "m" (*dq));
+ asm volatile("pxor %0,%%xmm0" : : "m" (*dp));
+
+ /* 1 = dq ^ q
+ * 0 = dp ^ p
+ */
+ asm volatile("movdqa %0,%%xmm4" : : "m" (qmul[0]));
+ asm volatile("movdqa %0,%%xmm5" : : "m" (qmul[16]));
+
+ asm volatile("movdqa %xmm1,%xmm3");
+ asm volatile("psraw $4,%xmm1");
+ asm volatile("pand %xmm7,%xmm3");
+ asm volatile("pand %xmm7,%xmm1");
+ asm volatile("pshufb %xmm3,%xmm4");
+ asm volatile("pshufb %xmm1,%xmm5");
+ asm volatile("pxor %xmm4,%xmm5");
+
+ asm volatile("movdqa %xmm0,%xmm2"); /* xmm2 = px */
+
+ /* xmm5 = qx */
+
+ asm volatile("movdqa %0,%%xmm4" : : "m" (pbmul[0]));
+ asm volatile("movdqa %0,%%xmm1" : : "m" (pbmul[16]));
+ asm volatile("movdqa %xmm2,%xmm3");
+ asm volatile("psraw $4,%xmm2");
+ asm volatile("pand %xmm7,%xmm3");
+ asm volatile("pand %xmm7,%xmm2");
+ asm volatile("pshufb %xmm3,%xmm4");
+ asm volatile("pshufb %xmm2,%xmm1");
+ asm volatile("pxor %xmm4,%xmm1");
+
+ /* xmm1 = pbmul[px] */
+ asm volatile("pxor %xmm5,%xmm1");
+ /* xmm1 = db = DQ */
+ asm volatile("movdqa %%xmm1,%0" : "=m" (*dq));
+
+ asm volatile("pxor %xmm1,%xmm0");
+ asm volatile("movdqa %%xmm0,%0" : "=m" (*dp));
+
+ bytes -= 16;
+ p += 16;
+ q += 16;
+ dp += 16;
+ dq += 16;
+#endif
+ }
+
+ kernel_fpu_end();
+}
+
+
+void raid6_datap_recov_ssse3(int disks, size_t bytes, int faila, void **ptrs)
+{
+ u8 *p, *q, *dq;
+ const u8 *qmul; /* Q multiplier table */
+ static const u8 __aligned(16) x0f[16] = {
+ 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f,
+ 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f};
+
+ p = (u8 *)ptrs[disks-2];
+ q = (u8 *)ptrs[disks-1];
+
+ /* Compute syndrome with zero for the missing data page
+ Use the dead data page as temporary storage for delta q */
+ dq = (u8 *)ptrs[faila];
+ ptrs[faila] = (void *)raid6_empty_zero_page;
+ ptrs[disks-1] = dq;
+
+ raid6_call.gen_syndrome(disks, bytes, ptrs);
+
+ /* Restore pointer table */
+ ptrs[faila] = dq;
+ ptrs[disks-1] = q;
+
+ /* Now, pick the proper data tables */
+ qmul = raid6_vgfmul[raid6_gfinv[raid6_gfexp[faila]]];
+
+ kernel_fpu_begin();
+
+ asm volatile("movdqa %0, %%xmm7" : : "m" (x0f[0]));
+
+ while (bytes) {
+#ifdef CONFIG_X86_64
+ asm volatile("movdqa %0, %%xmm3" : : "m" (dq[0]));
+ asm volatile("movdqa %0, %%xmm4" : : "m" (dq[16]));
+ asm volatile("pxor %0, %%xmm3" : : "m" (q[0]));
+ asm volatile("movdqa %0, %%xmm0" : : "m" (qmul[0]));
+
+ /* xmm3 = q[0] ^ dq[0] */
+
+ asm volatile("pxor %0, %%xmm4" : : "m" (q[16]));
+ asm volatile("movdqa %0, %%xmm1" : : "m" (qmul[16]));
+
+ /* xmm4 = q[16] ^ dq[16] */
+
+ asm volatile("movdqa %xmm3, %xmm6");
+ asm volatile("movdqa %xmm4, %xmm8");
+
+ /* xmm4 = xmm8 = q[16] ^ dq[16] */
+
+ asm volatile("psraw $4, %xmm3");
+ asm volatile("pand %xmm7, %xmm6");
+ asm volatile("pand %xmm7, %xmm3");
+ asm volatile("pshufb %xmm6, %xmm0");
+ asm volatile("pshufb %xmm3, %xmm1");
+ asm volatile("movdqa %0, %%xmm10" : : "m" (qmul[0]));
+ asm volatile("pxor %xmm0, %xmm1");
+ asm volatile("movdqa %0, %%xmm11" : : "m" (qmul[16]));
+
+ /* xmm1 = qmul[q[0] ^ dq[0]] */
+
+ asm volatile("psraw $4, %xmm4");
+ asm volatile("pand %xmm7, %xmm8");
+ asm volatile("pand %xmm7, %xmm4");
+ asm volatile("pshufb %xmm8, %xmm10");
+ asm volatile("pshufb %xmm4, %xmm11");
+ asm volatile("movdqa %0, %%xmm2" : : "m" (p[0]));
+ asm volatile("pxor %xmm10, %xmm11");
+ asm volatile("movdqa %0, %%xmm12" : : "m" (p[16]));
+
+ /* xmm11 = qmul[q[16] ^ dq[16]] */
+
+ asm volatile("pxor %xmm1, %xmm2");
+
+ /* xmm2 = p[0] ^ qmul[q[0] ^ dq[0]] */
+
+ asm volatile("pxor %xmm11, %xmm12");
+
+ /* xmm12 = p[16] ^ qmul[q[16] ^ dq[16]] */
+
+ asm volatile("movdqa %%xmm1, %0" : "=m" (dq[0]));
+ asm volatile("movdqa %%xmm11, %0" : "=m" (dq[16]));
+
+ asm volatile("movdqa %%xmm2, %0" : "=m" (p[0]));
+ asm volatile("movdqa %%xmm12, %0" : "=m" (p[16]));
+
+ bytes -= 32;
+ p += 32;
+ q += 32;
+ dq += 32;
+
+#else
+ asm volatile("movdqa %0, %%xmm3" : : "m" (dq[0]));
+ asm volatile("movdqa %0, %%xmm0" : : "m" (qmul[0]));
+ asm volatile("pxor %0, %%xmm3" : : "m" (q[0]));
+ asm volatile("movdqa %0, %%xmm1" : : "m" (qmul[16]));
+
+ /* xmm3 = *q ^ *dq */
+
+ asm volatile("movdqa %xmm3, %xmm6");
+ asm volatile("movdqa %0, %%xmm2" : : "m" (p[0]));
+ asm volatile("psraw $4, %xmm3");
+ asm volatile("pand %xmm7, %xmm6");
+ asm volatile("pand %xmm7, %xmm3");
+ asm volatile("pshufb %xmm6, %xmm0");
+ asm volatile("pshufb %xmm3, %xmm1");
+ asm volatile("pxor %xmm0, %xmm1");
+
+ /* xmm1 = qmul[*q ^ *dq */
+
+ asm volatile("pxor %xmm1, %xmm2");
+
+ /* xmm2 = *p ^ qmul[*q ^ *dq] */
+
+ asm volatile("movdqa %%xmm1, %0" : "=m" (dq[0]));
+ asm volatile("movdqa %%xmm2, %0" : "=m" (p[0]));
+
+ bytes -= 16;
+ p += 16;
+ q += 16;
+ dq += 16;
+#endif
+ }
+
+ kernel_fpu_end();
+}
+
+const struct raid6_recov_calls raid6_recov_ssse3 = {
+ .data2 = raid6_2data_recov_ssse3,
+ .datap = raid6_datap_recov_ssse3,
+ .valid = raid6_has_ssse3,
+#ifdef CONFIG_X86_64
+ .name = "ssse3x2",
+#else
+ .name = "ssse3x1",
+#endif
+ .priority = 1,
+};
+
+#endif
diff --git a/lib/raid6/test/Makefile b/lib/raid6/test/Makefile
index aa651697b6dc..c76151d94764 100644
--- a/lib/raid6/test/Makefile
+++ b/lib/raid6/test/Makefile
@@ -23,7 +23,7 @@ RANLIB = ranlib
all: raid6.a raid6test
raid6.a: int1.o int2.o int4.o int8.o int16.o int32.o mmx.o sse1.o sse2.o \
- altivec1.o altivec2.o altivec4.o altivec8.o recov.o algos.o \
+ altivec1.o altivec2.o altivec4.o altivec8.o recov.o recov_ssse3.o algos.o \
tables.o
rm -f $@
$(AR) cq $@ $^
diff --git a/lib/raid6/test/test.c b/lib/raid6/test/test.c
index 7a930318b17d..5a485b7a7d3c 100644
--- a/lib/raid6/test/test.c
+++ b/lib/raid6/test/test.c
@@ -90,25 +90,35 @@ static int test_disks(int i, int j)
int main(int argc, char *argv[])
{
const struct raid6_calls *const *algo;
+ const struct raid6_recov_calls *const *ra;
int i, j;
int err = 0;
makedata();
- for (algo = raid6_algos; *algo; algo++) {
- if (!(*algo)->valid || (*algo)->valid()) {
- raid6_call = **algo;
+ for (ra = raid6_recov_algos; *ra; ra++) {
+ if ((*ra)->valid && !(*ra)->valid())
+ continue;
+ raid6_2data_recov = (*ra)->data2;
+ raid6_datap_recov = (*ra)->datap;
- /* Nuke syndromes */
- memset(data[NDISKS-2], 0xee, 2*PAGE_SIZE);
+ printf("using recovery %s\n", (*ra)->name);
- /* Generate assumed good syndrome */
- raid6_call.gen_syndrome(NDISKS, PAGE_SIZE,
- (void **)&dataptrs);
+ for (algo = raid6_algos; *algo; algo++) {
+ if (!(*algo)->valid || (*algo)->valid()) {
+ raid6_call = **algo;
- for (i = 0; i < NDISKS-1; i++)
- for (j = i+1; j < NDISKS; j++)
- err += test_disks(i, j);
+ /* Nuke syndromes */
+ memset(data[NDISKS-2], 0xee, 2*PAGE_SIZE);
+
+ /* Generate assumed good syndrome */
+ raid6_call.gen_syndrome(NDISKS, PAGE_SIZE,
+ (void **)&dataptrs);
+
+ for (i = 0; i < NDISKS-1; i++)
+ for (j = i+1; j < NDISKS; j++)
+ err += test_disks(i, j);
+ }
}
printf("\n");
}
diff --git a/lib/raid6/x86.h b/lib/raid6/x86.h
index cb2a8c91c886..d55d63232c55 100644
--- a/lib/raid6/x86.h
+++ b/lib/raid6/x86.h
@@ -35,24 +35,29 @@ static inline void kernel_fpu_end(void)
{
}
+#define __aligned(x) __attribute__((aligned(x)))
+
#define X86_FEATURE_MMX (0*32+23) /* Multimedia Extensions */
#define X86_FEATURE_FXSR (0*32+24) /* FXSAVE and FXRSTOR instructions
* (fast save and restore) */
#define X86_FEATURE_XMM (0*32+25) /* Streaming SIMD Extensions */
#define X86_FEATURE_XMM2 (0*32+26) /* Streaming SIMD Extensions-2 */
+#define X86_FEATURE_XMM3 (4*32+ 0) /* "pni" SSE-3 */
+#define X86_FEATURE_SSSE3 (4*32+ 9) /* Supplemental SSE-3 */
+#define X86_FEATURE_AVX (4*32+28) /* Advanced Vector Extensions */
#define X86_FEATURE_MMXEXT (1*32+22) /* AMD MMX extensions */
/* Should work well enough on modern CPUs for testing */
static inline int boot_cpu_has(int flag)
{
- u32 eax = (flag >> 5) ? 0x80000001 : 1;
- u32 edx;
+ u32 eax = (flag & 0x20) ? 0x80000001 : 1;
+ u32 ecx, edx;
asm volatile("cpuid"
- : "+a" (eax), "=d" (edx)
- : : "ecx", "ebx");
+ : "+a" (eax), "=d" (edx), "=c" (ecx)
+ : : "ebx");
- return (edx >> (flag & 31)) & 1;
+ return ((flag & 0x80 ? ecx : edx) >> (flag & 31)) & 1;
}
#endif /* ndef __KERNEL__ */
diff --git a/lib/rational.c b/lib/rational.c
index d326da3976f5..f0aa21c2a762 100644
--- a/lib/rational.c
+++ b/lib/rational.c
@@ -1,7 +1,7 @@
/*
* rational fractions
*
- * Copyright (C) 2009 emlix GmbH, Oskar Schirmer <os@emlix.com>
+ * Copyright (C) 2009 emlix GmbH, Oskar Schirmer <oskar@scara.com>
*
* helper functions when coping with rational numbers
*/
diff --git a/lib/stmp_device.c b/lib/stmp_device.c
new file mode 100644
index 000000000000..8ac9bcc4289a
--- /dev/null
+++ b/lib/stmp_device.c
@@ -0,0 +1,80 @@
+/*
+ * Copyright (C) 1999 ARM Limited
+ * Copyright (C) 2000 Deep Blue Solutions Ltd
+ * Copyright 2006-2007,2010 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright 2008 Juergen Beisert, kernel@pengutronix.de
+ * Copyright 2009 Ilya Yanok, Emcraft Systems Ltd, yanok@emcraft.com
+ * Copyright (C) 2011 Wolfram Sang, Pengutronix e.K.
+ *
+ * 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/io.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/stmp_device.h>
+
+#define STMP_MODULE_CLKGATE (1 << 30)
+#define STMP_MODULE_SFTRST (1 << 31)
+
+/*
+ * Clear the bit and poll it cleared. This is usually called with
+ * a reset address and mask being either SFTRST(bit 31) or CLKGATE
+ * (bit 30).
+ */
+static int stmp_clear_poll_bit(void __iomem *addr, u32 mask)
+{
+ int timeout = 0x400;
+
+ writel(mask, addr + STMP_OFFSET_REG_CLR);
+ udelay(1);
+ while ((readl(addr) & mask) && --timeout)
+ /* nothing */;
+
+ return !timeout;
+}
+
+int stmp_reset_block(void __iomem *reset_addr)
+{
+ int ret;
+ int timeout = 0x400;
+
+ /* clear and poll SFTRST */
+ ret = stmp_clear_poll_bit(reset_addr, STMP_MODULE_SFTRST);
+ if (unlikely(ret))
+ goto error;
+
+ /* clear CLKGATE */
+ writel(STMP_MODULE_CLKGATE, reset_addr + STMP_OFFSET_REG_CLR);
+
+ /* set SFTRST to reset the block */
+ writel(STMP_MODULE_SFTRST, reset_addr + STMP_OFFSET_REG_SET);
+ udelay(1);
+
+ /* poll CLKGATE becoming set */
+ while ((!(readl(reset_addr) & STMP_MODULE_CLKGATE)) && --timeout)
+ /* nothing */;
+ if (unlikely(!timeout))
+ goto error;
+
+ /* clear and poll SFTRST */
+ ret = stmp_clear_poll_bit(reset_addr, STMP_MODULE_SFTRST);
+ if (unlikely(ret))
+ goto error;
+
+ /* clear and poll CLKGATE */
+ ret = stmp_clear_poll_bit(reset_addr, STMP_MODULE_CLKGATE);
+ if (unlikely(ret))
+ goto error;
+
+ return 0;
+
+error:
+ pr_err("%s(%p): module reset timeout\n", __func__, reset_addr);
+ return -ETIMEDOUT;
+}
+EXPORT_SYMBOL(stmp_reset_block);
diff --git a/lib/strncpy_from_user.c b/lib/strncpy_from_user.c
new file mode 100644
index 000000000000..bb2b201d6ad0
--- /dev/null
+++ b/lib/strncpy_from_user.c
@@ -0,0 +1,113 @@
+#include <linux/module.h>
+#include <linux/uaccess.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+
+#include <asm/byteorder.h>
+#include <asm/word-at-a-time.h>
+
+#ifdef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
+#define IS_UNALIGNED(src, dst) 0
+#else
+#define IS_UNALIGNED(src, dst) \
+ (((long) dst | (long) src) & (sizeof(long) - 1))
+#endif
+
+/*
+ * Do a strncpy, return length of string without final '\0'.
+ * 'count' is the user-supplied count (return 'count' if we
+ * hit it), 'max' is the address space maximum (and we return
+ * -EFAULT if we hit it).
+ */
+static inline long do_strncpy_from_user(char *dst, const char __user *src, long count, unsigned long max)
+{
+ const struct word_at_a_time constants = WORD_AT_A_TIME_CONSTANTS;
+ long res = 0;
+
+ /*
+ * Truncate 'max' to the user-specified limit, so that
+ * we only have one limit we need to check in the loop
+ */
+ if (max > count)
+ max = count;
+
+ if (IS_UNALIGNED(src, dst))
+ goto byte_at_a_time;
+
+ while (max >= sizeof(unsigned long)) {
+ unsigned long c, data;
+
+ /* Fall back to byte-at-a-time if we get a page fault */
+ if (unlikely(__get_user(c,(unsigned long __user *)(src+res))))
+ break;
+ *(unsigned long *)(dst+res) = c;
+ if (has_zero(c, &data, &constants)) {
+ data = prep_zero_mask(c, data, &constants);
+ data = create_zero_mask(data);
+ return res + find_zero(data);
+ }
+ res += sizeof(unsigned long);
+ max -= sizeof(unsigned long);
+ }
+
+byte_at_a_time:
+ while (max) {
+ char c;
+
+ if (unlikely(__get_user(c,src+res)))
+ return -EFAULT;
+ dst[res] = c;
+ if (!c)
+ return res;
+ res++;
+ max--;
+ }
+
+ /*
+ * Uhhuh. We hit 'max'. But was that the user-specified maximum
+ * too? If so, that's ok - we got as much as the user asked for.
+ */
+ if (res >= count)
+ return res;
+
+ /*
+ * Nope: we hit the address space limit, and we still had more
+ * characters the caller would have wanted. That's an EFAULT.
+ */
+ return -EFAULT;
+}
+
+/**
+ * strncpy_from_user: - Copy a NUL terminated string from userspace.
+ * @dst: Destination address, in kernel space. This buffer must be at
+ * least @count bytes long.
+ * @src: Source address, in user space.
+ * @count: Maximum number of bytes to copy, including the trailing NUL.
+ *
+ * Copies a NUL-terminated string from userspace to kernel space.
+ *
+ * On success, returns the length of the string (not including the trailing
+ * NUL).
+ *
+ * If access to userspace fails, returns -EFAULT (some data may have been
+ * copied).
+ *
+ * If @count is smaller than the length of the string, copies @count bytes
+ * and returns @count.
+ */
+long strncpy_from_user(char *dst, const char __user *src, long count)
+{
+ unsigned long max_addr, src_addr;
+
+ if (unlikely(count <= 0))
+ return 0;
+
+ max_addr = user_addr_max();
+ src_addr = (unsigned long)src;
+ if (likely(src_addr < max_addr)) {
+ unsigned long max = max_addr - src_addr;
+ return do_strncpy_from_user(dst, src, count, max);
+ }
+ return -EFAULT;
+}
+EXPORT_SYMBOL(strncpy_from_user);
diff --git a/lib/strnlen_user.c b/lib/strnlen_user.c
new file mode 100644
index 000000000000..a28df5206d95
--- /dev/null
+++ b/lib/strnlen_user.c
@@ -0,0 +1,138 @@
+#include <linux/kernel.h>
+#include <linux/export.h>
+#include <linux/uaccess.h>
+
+#include <asm/word-at-a-time.h>
+
+/* Set bits in the first 'n' bytes when loaded from memory */
+#ifdef __LITTLE_ENDIAN
+# define aligned_byte_mask(n) ((1ul << 8*(n))-1)
+#else
+# define aligned_byte_mask(n) (~0xfful << (BITS_PER_LONG - 8 - 8*(n)))
+#endif
+
+/*
+ * Do a strnlen, return length of string *with* final '\0'.
+ * 'count' is the user-supplied count, while 'max' is the
+ * address space maximum.
+ *
+ * Return 0 for exceptions (which includes hitting the address
+ * space maximum), or 'count+1' if hitting the user-supplied
+ * maximum count.
+ *
+ * NOTE! We can sometimes overshoot the user-supplied maximum
+ * if it fits in a aligned 'long'. The caller needs to check
+ * the return value against "> max".
+ */
+static inline long do_strnlen_user(const char __user *src, unsigned long count, unsigned long max)
+{
+ const struct word_at_a_time constants = WORD_AT_A_TIME_CONSTANTS;
+ long align, res = 0;
+ unsigned long c;
+
+ /*
+ * Truncate 'max' to the user-specified limit, so that
+ * we only have one limit we need to check in the loop
+ */
+ if (max > count)
+ max = count;
+
+ /*
+ * Do everything aligned. But that means that we
+ * need to also expand the maximum..
+ */
+ align = (sizeof(long) - 1) & (unsigned long)src;
+ src -= align;
+ max += align;
+
+ if (unlikely(__get_user(c,(unsigned long __user *)src)))
+ return 0;
+ c |= aligned_byte_mask(align);
+
+ for (;;) {
+ unsigned long data;
+ if (has_zero(c, &data, &constants)) {
+ data = prep_zero_mask(c, data, &constants);
+ data = create_zero_mask(data);
+ return res + find_zero(data) + 1 - align;
+ }
+ res += sizeof(unsigned long);
+ if (unlikely(max < sizeof(unsigned long)))
+ break;
+ max -= sizeof(unsigned long);
+ if (unlikely(__get_user(c,(unsigned long __user *)(src+res))))
+ return 0;
+ }
+ res -= align;
+
+ /*
+ * Uhhuh. We hit 'max'. But was that the user-specified maximum
+ * too? If so, return the marker for "too long".
+ */
+ if (res >= count)
+ return count+1;
+
+ /*
+ * Nope: we hit the address space limit, and we still had more
+ * characters the caller would have wanted. That's 0.
+ */
+ return 0;
+}
+
+/**
+ * strnlen_user: - Get the size of a user string INCLUDING final NUL.
+ * @str: The string to measure.
+ * @count: Maximum count (including NUL character)
+ *
+ * Context: User context only. This function may sleep.
+ *
+ * Get the size of a NUL-terminated string in user space.
+ *
+ * Returns the size of the string INCLUDING the terminating NUL.
+ * If the string is too long, returns 'count+1'.
+ * On exception (or invalid count), returns 0.
+ */
+long strnlen_user(const char __user *str, long count)
+{
+ unsigned long max_addr, src_addr;
+
+ if (unlikely(count <= 0))
+ return 0;
+
+ max_addr = user_addr_max();
+ src_addr = (unsigned long)str;
+ if (likely(src_addr < max_addr)) {
+ unsigned long max = max_addr - src_addr;
+ return do_strnlen_user(str, count, max);
+ }
+ return 0;
+}
+EXPORT_SYMBOL(strnlen_user);
+
+/**
+ * strlen_user: - Get the size of a user string INCLUDING final NUL.
+ * @str: The string to measure.
+ *
+ * Context: User context only. This function may sleep.
+ *
+ * Get the size of a NUL-terminated string in user space.
+ *
+ * Returns the size of the string INCLUDING the terminating NUL.
+ * On exception, returns 0.
+ *
+ * If there is a limit on the length of a valid string, you may wish to
+ * consider using strnlen_user() instead.
+ */
+long strlen_user(const char __user *str)
+{
+ unsigned long max_addr, src_addr;
+
+ max_addr = user_addr_max();
+ src_addr = (unsigned long)str;
+ if (likely(src_addr < max_addr)) {
+ unsigned long max = max_addr - src_addr;
+ return do_strnlen_user(str, ~0ul, max);
+ }
+ return 0;
+}
+EXPORT_SYMBOL(strlen_user);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.