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-rw-r--r--arch/powerpc/include/asm/nvram.h10
-rw-r--r--arch/powerpc/kernel/nvram_64.c254
-rw-r--r--arch/powerpc/platforms/pseries/nvram.c200
3 files changed, 227 insertions, 237 deletions
diff --git a/arch/powerpc/include/asm/nvram.h b/arch/powerpc/include/asm/nvram.h
index 459dc09ecbd8..92efe67d1c57 100644
--- a/arch/powerpc/include/asm/nvram.h
+++ b/arch/powerpc/include/asm/nvram.h
@@ -30,13 +30,14 @@
#include <linux/errno.h>
#include <linux/list.h>
+#ifdef CONFIG_PPC_PSERIES
extern int nvram_write_error_log(char * buff, int length,
unsigned int err_type, unsigned int err_seq);
extern int nvram_read_error_log(char * buff, int length,
unsigned int * err_type, unsigned int *err_seq);
extern int nvram_clear_error_log(void);
-
extern int pSeries_nvram_init(void);
+#endif /* CONFIG_PPC_PSERIES */
#ifdef CONFIG_MMIO_NVRAM
extern int mmio_nvram_init(void);
@@ -47,6 +48,13 @@ static inline int mmio_nvram_init(void)
}
#endif
+extern int __init nvram_scan_partitions(void);
+extern loff_t nvram_create_partition(const char *name, int sig,
+ int req_size, int min_size);
+extern int nvram_remove_partition(const char *name, int sig);
+extern int nvram_get_partition_size(loff_t data_index);
+extern loff_t nvram_find_partition(const char *name, int sig, int *out_size);
+
#endif /* __KERNEL__ */
/* PowerMac specific nvram stuffs */
diff --git a/arch/powerpc/kernel/nvram_64.c b/arch/powerpc/kernel/nvram_64.c
index 76f546b9944d..125d86cf0afc 100644
--- a/arch/powerpc/kernel/nvram_64.c
+++ b/arch/powerpc/kernel/nvram_64.c
@@ -36,8 +36,6 @@
#define NVRAM_HEADER_LEN sizeof(struct nvram_header)
#define NVRAM_BLOCK_LEN NVRAM_HEADER_LEN
-#define NVRAM_MAX_REQ 2079
-#define NVRAM_MIN_REQ 1055
/* If change this size, then change the size of NVNAME_LEN */
struct nvram_header {
@@ -54,13 +52,6 @@ struct nvram_partition {
};
static struct nvram_partition * nvram_part;
-static long nvram_error_log_index = -1;
-static long nvram_error_log_size = 0;
-
-struct err_log_info {
- int error_type;
- unsigned int seq_num;
-};
static loff_t dev_nvram_llseek(struct file *file, loff_t offset, int origin)
{
@@ -254,7 +245,7 @@ static unsigned char __init nvram_checksum(struct nvram_header *p)
* @sig: signature of the partition(s) to remove
*/
-static int __init nvram_remove_partition(const char *name, int sig)
+int __init nvram_remove_partition(const char *name, int sig)
{
struct nvram_partition *part, *prev, *tmp;
int rc;
@@ -313,8 +304,8 @@ static int __init nvram_remove_partition(const char *name, int sig)
* you need to query for the actual size yourself after the
* call using nvram_partition_get_size().
*/
-static loff_t __init nvram_create_partition(const char *name, int sig,
- int req_size, int min_size)
+loff_t __init nvram_create_partition(const char *name, int sig,
+ int req_size, int min_size)
{
struct nvram_partition *part;
struct nvram_partition *new_part;
@@ -417,7 +408,7 @@ static loff_t __init nvram_create_partition(const char *name, int sig,
* the partition. The same value that is returned by
* nvram_create_partition().
*/
-static int nvram_get_partition_size(loff_t data_index)
+int nvram_get_partition_size(loff_t data_index)
{
struct nvram_partition *part;
@@ -451,75 +442,7 @@ loff_t nvram_find_partition(const char *name, int sig, int *out_size)
return 0;
}
-/* nvram_setup_partition
- *
- * This will setup the partition we need for buffering the
- * error logs and cleanup partitions if needed.
- *
- * The general strategy is the following:
- * 1.) If there is ppc64,linux partition large enough then use it.
- * 2.) If there is not a ppc64,linux partition large enough, search
- * for a free partition that is large enough.
- * 3.) If there is not a free partition large enough remove
- * _all_ OS partitions and consolidate the space.
- * 4.) Will first try getting a chunk that will satisfy the maximum
- * error log size (NVRAM_MAX_REQ).
- * 5.) If the max chunk cannot be allocated then try finding a chunk
- * that will satisfy the minum needed (NVRAM_MIN_REQ).
- */
-static int __init nvram_setup_partition(void)
-{
- loff_t p;
- int size;
-
- /* For now, we don't do any of this on pmac, until I
- * have figured out if it's worth killing some unused stuffs
- * in our nvram, as Apple defined partitions use pretty much
- * all of the space
- */
- if (machine_is(powermac))
- return -ENOSPC;
-
- p = nvram_find_partition("ppc64,linux", NVRAM_SIG_OS, &size);
-
- /* Found one but too small, remove it */
- if (p && size < NVRAM_MIN_REQ) {
- pr_info("nvram: Found too small ppc64,linux partition"
- ",removing it...");
- nvram_remove_partition("ppc64,linux", NVRAM_SIG_OS);
- p = 0;
- }
-
- /* Create one if we didn't find */
- if (!p) {
- p = nvram_create_partition("ppc64,linux", NVRAM_SIG_OS,
- NVRAM_MAX_REQ, NVRAM_MIN_REQ);
- /* No room for it, try to get rid of any OS partition
- * and try again
- */
- if (p == -ENOSPC) {
- pr_info("nvram: No room to create ppc64,linux"
- " partition, deleting all OS partitions...");
- nvram_remove_partition(NULL, NVRAM_SIG_OS);
- p = nvram_create_partition("ppc64,linux", NVRAM_SIG_OS,
- NVRAM_MAX_REQ, NVRAM_MIN_REQ);
- }
- }
-
- if (p <= 0) {
- pr_err("nvram: Failed to find or create ppc64,linux"
- " partition, err %d\n", (int)p);
- return 0;
- }
-
- nvram_error_log_index = p;
- nvram_error_log_size = nvram_get_partition_size(p) -
- sizeof(struct err_log_info);
-
- return 0;
-}
-
-static int __init nvram_scan_partitions(void)
+int __init nvram_scan_partitions(void)
{
loff_t cur_index = 0;
struct nvram_header phead;
@@ -529,7 +452,15 @@ static int __init nvram_scan_partitions(void)
int total_size;
int err;
- if (ppc_md.nvram_size == NULL)
+ /* Initialize our anchor for the nvram partition list */
+ nvram_part = kmalloc(sizeof(struct nvram_partition), GFP_KERNEL);
+ if (!nvram_part) {
+ printk(KERN_ERR "nvram_init: Failed kmalloc\n");
+ return -ENOMEM;
+ }
+ INIT_LIST_HEAD(&nvram_part->partition);
+
+ if (ppc_md.nvram_size == NULL || ppc_md.nvram_size() <= 0)
return -ENODEV;
total_size = ppc_md.nvram_size();
@@ -582,6 +513,10 @@ static int __init nvram_scan_partitions(void)
}
err = 0;
+#ifdef DEBUG_NVRAM
+ nvram_print_partitions("NVRAM Partitions");
+#endif
+
out:
kfree(header);
return err;
@@ -589,7 +524,6 @@ static int __init nvram_scan_partitions(void)
static int __init nvram_init(void)
{
- int error;
int rc;
BUILD_BUG_ON(NVRAM_BLOCK_LEN != 16);
@@ -603,29 +537,6 @@ static int __init nvram_init(void)
return rc;
}
- /* initialize our anchor for the nvram partition list */
- nvram_part = kmalloc(sizeof(struct nvram_partition), GFP_KERNEL);
- if (!nvram_part) {
- printk(KERN_ERR "nvram_init: Failed kmalloc\n");
- return -ENOMEM;
- }
- INIT_LIST_HEAD(&nvram_part->partition);
-
- /* Get all the NVRAM partitions */
- error = nvram_scan_partitions();
- if (error) {
- printk(KERN_ERR "nvram_init: Failed nvram_scan_partitions\n");
- return error;
- }
-
- if(nvram_setup_partition())
- printk(KERN_WARNING "nvram_init: Could not find nvram partition"
- " for nvram buffered error logging.\n");
-
-#ifdef DEBUG_NVRAM
- nvram_print_partitions("NVRAM Partitions");
-#endif
-
return rc;
}
@@ -634,135 +545,6 @@ void __exit nvram_cleanup(void)
misc_deregister( &nvram_dev );
}
-
-#ifdef CONFIG_PPC_PSERIES
-
-/* nvram_write_error_log
- *
- * We need to buffer the error logs into nvram to ensure that we have
- * the failure information to decode. If we have a severe error there
- * is no way to guarantee that the OS or the machine is in a state to
- * get back to user land and write the error to disk. For example if
- * the SCSI device driver causes a Machine Check by writing to a bad
- * IO address, there is no way of guaranteeing that the device driver
- * is in any state that is would also be able to write the error data
- * captured to disk, thus we buffer it in NVRAM for analysis on the
- * next boot.
- *
- * In NVRAM the partition containing the error log buffer will looks like:
- * Header (in bytes):
- * +-----------+----------+--------+------------+------------------+
- * | signature | checksum | length | name | data |
- * |0 |1 |2 3|4 15|16 length-1|
- * +-----------+----------+--------+------------+------------------+
- *
- * The 'data' section would look like (in bytes):
- * +--------------+------------+-----------------------------------+
- * | event_logged | sequence # | error log |
- * |0 3|4 7|8 nvram_error_log_size-1|
- * +--------------+------------+-----------------------------------+
- *
- * event_logged: 0 if event has not been logged to syslog, 1 if it has
- * sequence #: The unique sequence # for each event. (until it wraps)
- * error log: The error log from event_scan
- */
-int nvram_write_error_log(char * buff, int length,
- unsigned int err_type, unsigned int error_log_cnt)
-{
- int rc;
- loff_t tmp_index;
- struct err_log_info info;
-
- if (nvram_error_log_index == -1) {
- return -ESPIPE;
- }
-
- if (length > nvram_error_log_size) {
- length = nvram_error_log_size;
- }
-
- info.error_type = err_type;
- info.seq_num = error_log_cnt;
-
- tmp_index = nvram_error_log_index;
-
- rc = ppc_md.nvram_write((char *)&info, sizeof(struct err_log_info), &tmp_index);
- if (rc <= 0) {
- printk(KERN_ERR "nvram_write_error_log: Failed nvram_write (%d)\n", rc);
- return rc;
- }
-
- rc = ppc_md.nvram_write(buff, length, &tmp_index);
- if (rc <= 0) {
- printk(KERN_ERR "nvram_write_error_log: Failed nvram_write (%d)\n", rc);
- return rc;
- }
-
- return 0;
-}
-
-/* nvram_read_error_log
- *
- * Reads nvram for error log for at most 'length'
- */
-int nvram_read_error_log(char * buff, int length,
- unsigned int * err_type, unsigned int * error_log_cnt)
-{
- int rc;
- loff_t tmp_index;
- struct err_log_info info;
-
- if (nvram_error_log_index == -1)
- return -1;
-
- if (length > nvram_error_log_size)
- length = nvram_error_log_size;
-
- tmp_index = nvram_error_log_index;
-
- rc = ppc_md.nvram_read((char *)&info, sizeof(struct err_log_info), &tmp_index);
- if (rc <= 0) {
- printk(KERN_ERR "nvram_read_error_log: Failed nvram_read (%d)\n", rc);
- return rc;
- }
-
- rc = ppc_md.nvram_read(buff, length, &tmp_index);
- if (rc <= 0) {
- printk(KERN_ERR "nvram_read_error_log: Failed nvram_read (%d)\n", rc);
- return rc;
- }
-
- *error_log_cnt = info.seq_num;
- *err_type = info.error_type;
-
- return 0;
-}
-
-/* This doesn't actually zero anything, but it sets the event_logged
- * word to tell that this event is safely in syslog.
- */
-int nvram_clear_error_log(void)
-{
- loff_t tmp_index;
- int clear_word = ERR_FLAG_ALREADY_LOGGED;
- int rc;
-
- if (nvram_error_log_index == -1)
- return -1;
-
- tmp_index = nvram_error_log_index;
-
- rc = ppc_md.nvram_write((char *)&clear_word, sizeof(int), &tmp_index);
- if (rc <= 0) {
- printk(KERN_ERR "nvram_clear_error_log: Failed nvram_write (%d)\n", rc);
- return rc;
- }
-
- return 0;
-}
-
-#endif /* CONFIG_PPC_PSERIES */
-
module_init(nvram_init);
module_exit(nvram_cleanup);
MODULE_LICENSE("GPL");
diff --git a/arch/powerpc/platforms/pseries/nvram.c b/arch/powerpc/platforms/pseries/nvram.c
index 2a1ef5c25344..55a7141131f1 100644
--- a/arch/powerpc/platforms/pseries/nvram.c
+++ b/arch/powerpc/platforms/pseries/nvram.c
@@ -30,6 +30,16 @@ static int nvram_fetch, nvram_store;
static char nvram_buf[NVRW_CNT]; /* assume this is in the first 4GB */
static DEFINE_SPINLOCK(nvram_lock);
+static long nvram_error_log_index = -1;
+static long nvram_error_log_size = 0;
+
+struct err_log_info {
+ int error_type;
+ unsigned int seq_num;
+};
+#define NVRAM_MAX_REQ 2079
+#define NVRAM_MIN_REQ 1055
+
static ssize_t pSeries_nvram_read(char *buf, size_t count, loff_t *index)
{
unsigned int i;
@@ -121,6 +131,196 @@ static ssize_t pSeries_nvram_get_size(void)
return nvram_size ? nvram_size : -ENODEV;
}
+
+/* nvram_write_error_log
+ *
+ * We need to buffer the error logs into nvram to ensure that we have
+ * the failure information to decode. If we have a severe error there
+ * is no way to guarantee that the OS or the machine is in a state to
+ * get back to user land and write the error to disk. For example if
+ * the SCSI device driver causes a Machine Check by writing to a bad
+ * IO address, there is no way of guaranteeing that the device driver
+ * is in any state that is would also be able to write the error data
+ * captured to disk, thus we buffer it in NVRAM for analysis on the
+ * next boot.
+ *
+ * In NVRAM the partition containing the error log buffer will looks like:
+ * Header (in bytes):
+ * +-----------+----------+--------+------------+------------------+
+ * | signature | checksum | length | name | data |
+ * |0 |1 |2 3|4 15|16 length-1|
+ * +-----------+----------+--------+------------+------------------+
+ *
+ * The 'data' section would look like (in bytes):
+ * +--------------+------------+-----------------------------------+
+ * | event_logged | sequence # | error log |
+ * |0 3|4 7|8 nvram_error_log_size-1|
+ * +--------------+------------+-----------------------------------+
+ *
+ * event_logged: 0 if event has not been logged to syslog, 1 if it has
+ * sequence #: The unique sequence # for each event. (until it wraps)
+ * error log: The error log from event_scan
+ */
+int nvram_write_error_log(char * buff, int length,
+ unsigned int err_type, unsigned int error_log_cnt)
+{
+ int rc;
+ loff_t tmp_index;
+ struct err_log_info info;
+
+ if (nvram_error_log_index == -1) {
+ return -ESPIPE;
+ }
+
+ if (length > nvram_error_log_size) {
+ length = nvram_error_log_size;
+ }
+
+ info.error_type = err_type;
+ info.seq_num = error_log_cnt;
+
+ tmp_index = nvram_error_log_index;
+
+ rc = ppc_md.nvram_write((char *)&info, sizeof(struct err_log_info), &tmp_index);
+ if (rc <= 0) {
+ printk(KERN_ERR "nvram_write_error_log: Failed nvram_write (%d)\n", rc);
+ return rc;
+ }
+
+ rc = ppc_md.nvram_write(buff, length, &tmp_index);
+ if (rc <= 0) {
+ printk(KERN_ERR "nvram_write_error_log: Failed nvram_write (%d)\n", rc);
+ return rc;
+ }
+
+ return 0;
+}
+
+/* nvram_read_error_log
+ *
+ * Reads nvram for error log for at most 'length'
+ */
+int nvram_read_error_log(char * buff, int length,
+ unsigned int * err_type, unsigned int * error_log_cnt)
+{
+ int rc;
+ loff_t tmp_index;
+ struct err_log_info info;
+
+ if (nvram_error_log_index == -1)
+ return -1;
+
+ if (length > nvram_error_log_size)
+ length = nvram_error_log_size;
+
+ tmp_index = nvram_error_log_index;
+
+ rc = ppc_md.nvram_read((char *)&info, sizeof(struct err_log_info), &tmp_index);
+ if (rc <= 0) {
+ printk(KERN_ERR "nvram_read_error_log: Failed nvram_read (%d)\n", rc);
+ return rc;
+ }
+
+ rc = ppc_md.nvram_read(buff, length, &tmp_index);
+ if (rc <= 0) {
+ printk(KERN_ERR "nvram_read_error_log: Failed nvram_read (%d)\n", rc);
+ return rc;
+ }
+
+ *error_log_cnt = info.seq_num;
+ *err_type = info.error_type;
+
+ return 0;
+}
+
+/* This doesn't actually zero anything, but it sets the event_logged
+ * word to tell that this event is safely in syslog.
+ */
+int nvram_clear_error_log(void)
+{
+ loff_t tmp_index;
+ int clear_word = ERR_FLAG_ALREADY_LOGGED;
+ int rc;
+
+ if (nvram_error_log_index == -1)
+ return -1;
+
+ tmp_index = nvram_error_log_index;
+
+ rc = ppc_md.nvram_write((char *)&clear_word, sizeof(int), &tmp_index);
+ if (rc <= 0) {
+ printk(KERN_ERR "nvram_clear_error_log: Failed nvram_write (%d)\n", rc);
+ return rc;
+ }
+
+ return 0;
+}
+
+/* pseries_nvram_init_log_partition
+ *
+ * This will setup the partition we need for buffering the
+ * error logs and cleanup partitions if needed.
+ *
+ * The general strategy is the following:
+ * 1.) If there is ppc64,linux partition large enough then use it.
+ * 2.) If there is not a ppc64,linux partition large enough, search
+ * for a free partition that is large enough.
+ * 3.) If there is not a free partition large enough remove
+ * _all_ OS partitions and consolidate the space.
+ * 4.) Will first try getting a chunk that will satisfy the maximum
+ * error log size (NVRAM_MAX_REQ).
+ * 5.) If the max chunk cannot be allocated then try finding a chunk
+ * that will satisfy the minum needed (NVRAM_MIN_REQ).
+ */
+static int __init pseries_nvram_init_log_partition(void)
+{
+ loff_t p;
+ int size;
+
+ /* Scan nvram for partitions */
+ nvram_scan_partitions();
+
+ /* Lookg for ours */
+ p = nvram_find_partition("ppc64,linux", NVRAM_SIG_OS, &size);
+
+ /* Found one but too small, remove it */
+ if (p && size < NVRAM_MIN_REQ) {
+ pr_info("nvram: Found too small ppc64,linux partition"
+ ",removing it...");
+ nvram_remove_partition("ppc64,linux", NVRAM_SIG_OS);
+ p = 0;
+ }
+
+ /* Create one if we didn't find */
+ if (!p) {
+ p = nvram_create_partition("ppc64,linux", NVRAM_SIG_OS,
+ NVRAM_MAX_REQ, NVRAM_MIN_REQ);
+ /* No room for it, try to get rid of any OS partition
+ * and try again
+ */
+ if (p == -ENOSPC) {
+ pr_info("nvram: No room to create ppc64,linux"
+ " partition, deleting all OS partitions...");
+ nvram_remove_partition(NULL, NVRAM_SIG_OS);
+ p = nvram_create_partition("ppc64,linux", NVRAM_SIG_OS,
+ NVRAM_MAX_REQ, NVRAM_MIN_REQ);
+ }
+ }
+
+ if (p <= 0) {
+ pr_err("nvram: Failed to find or create ppc64,linux"
+ " partition, err %d\n", (int)p);
+ return 0;
+ }
+
+ nvram_error_log_index = p;
+ nvram_error_log_size = nvram_get_partition_size(p) -
+ sizeof(struct err_log_info);
+
+ return 0;
+}
+machine_arch_initcall(pseries, pseries_nvram_init_log_partition);
+
int __init pSeries_nvram_init(void)
{
struct device_node *nvram;
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-20 09:43:19 +0300