From: David Gibson Date: Thu, 10 Nov 2005 01:42:17 +0000 (+1100) Subject: [PATCH] powerpc: Move scanlog.c to platforms/pseries X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=f6d3577da14e877b79517c883d1139ee6ad7da45;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git [PATCH] powerpc: Move scanlog.c to platforms/pseries scanlog.c is only compiled on pSeries. Thus, this patch moves it to platforms/pseries. Built and booted on pSeries LPAR (ARCH=powerpc and ARCH=ppc64). Built for iSeries (ARCH=powerpc). Signed-off-by: David Gibson Signed-off-by: Paul Mackerras --- diff --git a/arch/powerpc/platforms/pseries/Makefile b/arch/powerpc/platforms/pseries/Makefile index 27515476ad6c..e7ca5b1f591e 100644 --- a/arch/powerpc/platforms/pseries/Makefile +++ b/arch/powerpc/platforms/pseries/Makefile @@ -3,4 +3,5 @@ obj-y := pci.o lpar.o hvCall.o nvram.o reconfig.o \ obj-$(CONFIG_SMP) += smp.o obj-$(CONFIG_IBMVIO) += vio.o obj-$(CONFIG_XICS) += xics.o +obj-$(CONFIG_SCANLOG) += scanlog.o obj-$(CONFIG_EEH) += eeh.o eeh_event.o diff --git a/arch/powerpc/platforms/pseries/scanlog.c b/arch/powerpc/platforms/pseries/scanlog.c new file mode 100644 index 000000000000..2edc947f7c44 --- /dev/null +++ b/arch/powerpc/platforms/pseries/scanlog.c @@ -0,0 +1,235 @@ +/* + * c 2001 PPC 64 Team, IBM Corp + * + * 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. + * + * scan-log-data driver for PPC64 Todd Inglett + * + * When ppc64 hardware fails the service processor dumps internal state + * of the system. After a reboot the operating system can access a dump + * of this data using this driver. A dump exists if the device-tree + * /chosen/ibm,scan-log-data property exists. + * + * This driver exports /proc/ppc64/scan-log-dump which can be read. + * The driver supports only sequential reads. + * + * The driver looks at a write to the driver for the single word "reset". + * If given, the driver will reset the scanlog so the platform can free it. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define MODULE_VERS "1.0" +#define MODULE_NAME "scanlog" + +/* Status returns from ibm,scan-log-dump */ +#define SCANLOG_COMPLETE 0 +#define SCANLOG_HWERROR -1 +#define SCANLOG_CONTINUE 1 + +#define DEBUG(A...) do { if (scanlog_debug) printk(KERN_ERR "scanlog: " A); } while (0) + +static int scanlog_debug; +static unsigned int ibm_scan_log_dump; /* RTAS token */ +static struct proc_dir_entry *proc_ppc64_scan_log_dump; /* The proc file */ + +static ssize_t scanlog_read(struct file *file, char __user *buf, + size_t count, loff_t *ppos) +{ + struct inode * inode = file->f_dentry->d_inode; + struct proc_dir_entry *dp; + unsigned int *data; + int status; + unsigned long len, off; + unsigned int wait_time; + + dp = PDE(inode); + data = (unsigned int *)dp->data; + + if (!data) { + printk(KERN_ERR "scanlog: read failed no data\n"); + return -EIO; + } + + if (count > RTAS_DATA_BUF_SIZE) + count = RTAS_DATA_BUF_SIZE; + + if (count < 1024) { + /* This is the min supported by this RTAS call. Rather + * than do all the buffering we insist the user code handle + * larger reads. As long as cp works... :) + */ + printk(KERN_ERR "scanlog: cannot perform a small read (%ld)\n", count); + return -EINVAL; + } + + if (!access_ok(VERIFY_WRITE, buf, count)) + return -EFAULT; + + for (;;) { + wait_time = 500; /* default wait if no data */ + spin_lock(&rtas_data_buf_lock); + memcpy(rtas_data_buf, data, RTAS_DATA_BUF_SIZE); + status = rtas_call(ibm_scan_log_dump, 2, 1, NULL, + (u32) __pa(rtas_data_buf), (u32) count); + memcpy(data, rtas_data_buf, RTAS_DATA_BUF_SIZE); + spin_unlock(&rtas_data_buf_lock); + + DEBUG("status=%d, data[0]=%x, data[1]=%x, data[2]=%x\n", + status, data[0], data[1], data[2]); + switch (status) { + case SCANLOG_COMPLETE: + DEBUG("hit eof\n"); + return 0; + case SCANLOG_HWERROR: + DEBUG("hardware error reading scan log data\n"); + return -EIO; + case SCANLOG_CONTINUE: + /* We may or may not have data yet */ + len = data[1]; + off = data[2]; + if (len > 0) { + if (copy_to_user(buf, ((char *)data)+off, len)) + return -EFAULT; + return len; + } + /* Break to sleep default time */ + break; + default: + if (status > 9900 && status <= 9905) { + wait_time = rtas_extended_busy_delay_time(status); + } else { + printk(KERN_ERR "scanlog: unknown error from rtas: %d\n", status); + return -EIO; + } + } + /* Apparently no data yet. Wait and try again. */ + msleep_interruptible(wait_time); + } + /*NOTREACHED*/ +} + +static ssize_t scanlog_write(struct file * file, const char __user * buf, + size_t count, loff_t *ppos) +{ + char stkbuf[20]; + int status; + + if (count > 19) count = 19; + if (copy_from_user (stkbuf, buf, count)) { + return -EFAULT; + } + stkbuf[count] = 0; + + if (buf) { + if (strncmp(stkbuf, "reset", 5) == 0) { + DEBUG("reset scanlog\n"); + status = rtas_call(ibm_scan_log_dump, 2, 1, NULL, 0, 0); + DEBUG("rtas returns %d\n", status); + } else if (strncmp(stkbuf, "debugon", 7) == 0) { + printk(KERN_ERR "scanlog: debug on\n"); + scanlog_debug = 1; + } else if (strncmp(stkbuf, "debugoff", 8) == 0) { + printk(KERN_ERR "scanlog: debug off\n"); + scanlog_debug = 0; + } + } + return count; +} + +static int scanlog_open(struct inode * inode, struct file * file) +{ + struct proc_dir_entry *dp = PDE(inode); + unsigned int *data = (unsigned int *)dp->data; + + if (!data) { + printk(KERN_ERR "scanlog: open failed no data\n"); + return -EIO; + } + + if (data[0] != 0) { + /* This imperfect test stops a second copy of the + * data (or a reset while data is being copied) + */ + return -EBUSY; + } + + data[0] = 0; /* re-init so we restart the scan */ + + return 0; +} + +static int scanlog_release(struct inode * inode, struct file * file) +{ + struct proc_dir_entry *dp = PDE(inode); + unsigned int *data = (unsigned int *)dp->data; + + if (!data) { + printk(KERN_ERR "scanlog: release failed no data\n"); + return -EIO; + } + data[0] = 0; + + return 0; +} + +struct file_operations scanlog_fops = { + .owner = THIS_MODULE, + .read = scanlog_read, + .write = scanlog_write, + .open = scanlog_open, + .release = scanlog_release, +}; + +int __init scanlog_init(void) +{ + struct proc_dir_entry *ent; + + ibm_scan_log_dump = rtas_token("ibm,scan-log-dump"); + if (ibm_scan_log_dump == RTAS_UNKNOWN_SERVICE) { + printk(KERN_ERR "scan-log-dump not implemented on this system\n"); + return -EIO; + } + + ent = create_proc_entry("ppc64/rtas/scan-log-dump", S_IRUSR, NULL); + if (ent) { + ent->proc_fops = &scanlog_fops; + /* Ideally we could allocate a buffer < 4G */ + ent->data = kmalloc(RTAS_DATA_BUF_SIZE, GFP_KERNEL); + if (!ent->data) { + printk(KERN_ERR "Failed to allocate a buffer\n"); + remove_proc_entry("scan-log-dump", ent->parent); + return -ENOMEM; + } + ((unsigned int *)ent->data)[0] = 0; + } else { + printk(KERN_ERR "Failed to create ppc64/scan-log-dump proc entry\n"); + return -EIO; + } + proc_ppc64_scan_log_dump = ent; + + return 0; +} + +void __exit scanlog_cleanup(void) +{ + if (proc_ppc64_scan_log_dump) { + kfree(proc_ppc64_scan_log_dump->data); + remove_proc_entry("scan-log-dump", proc_ppc64_scan_log_dump->parent); + } +} + +module_init(scanlog_init); +module_exit(scanlog_cleanup); +MODULE_LICENSE("GPL"); diff --git a/arch/ppc64/kernel/Makefile b/arch/ppc64/kernel/Makefile index 1f71f23cc26d..048ba910f028 100644 --- a/arch/ppc64/kernel/Makefile +++ b/arch/ppc64/kernel/Makefile @@ -36,7 +36,6 @@ ifneq ($(CONFIG_PPC_MERGE),y) obj-$(CONFIG_MODULES) += ppc_ksyms.o endif obj-$(CONFIG_PPC_RTAS) += rtas_pci.o -obj-$(CONFIG_SCANLOG) += scanlog.o obj-$(CONFIG_LPARCFG) += lparcfg.o obj-$(CONFIG_HVC_CONSOLE) += hvconsole.o ifneq ($(CONFIG_PPC_MERGE),y) diff --git a/arch/ppc64/kernel/scanlog.c b/arch/ppc64/kernel/scanlog.c deleted file mode 100644 index 2edc947f7c44..000000000000 --- a/arch/ppc64/kernel/scanlog.c +++ /dev/null @@ -1,235 +0,0 @@ -/* - * c 2001 PPC 64 Team, IBM Corp - * - * 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. - * - * scan-log-data driver for PPC64 Todd Inglett - * - * When ppc64 hardware fails the service processor dumps internal state - * of the system. After a reboot the operating system can access a dump - * of this data using this driver. A dump exists if the device-tree - * /chosen/ibm,scan-log-data property exists. - * - * This driver exports /proc/ppc64/scan-log-dump which can be read. - * The driver supports only sequential reads. - * - * The driver looks at a write to the driver for the single word "reset". - * If given, the driver will reset the scanlog so the platform can free it. - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#define MODULE_VERS "1.0" -#define MODULE_NAME "scanlog" - -/* Status returns from ibm,scan-log-dump */ -#define SCANLOG_COMPLETE 0 -#define SCANLOG_HWERROR -1 -#define SCANLOG_CONTINUE 1 - -#define DEBUG(A...) do { if (scanlog_debug) printk(KERN_ERR "scanlog: " A); } while (0) - -static int scanlog_debug; -static unsigned int ibm_scan_log_dump; /* RTAS token */ -static struct proc_dir_entry *proc_ppc64_scan_log_dump; /* The proc file */ - -static ssize_t scanlog_read(struct file *file, char __user *buf, - size_t count, loff_t *ppos) -{ - struct inode * inode = file->f_dentry->d_inode; - struct proc_dir_entry *dp; - unsigned int *data; - int status; - unsigned long len, off; - unsigned int wait_time; - - dp = PDE(inode); - data = (unsigned int *)dp->data; - - if (!data) { - printk(KERN_ERR "scanlog: read failed no data\n"); - return -EIO; - } - - if (count > RTAS_DATA_BUF_SIZE) - count = RTAS_DATA_BUF_SIZE; - - if (count < 1024) { - /* This is the min supported by this RTAS call. Rather - * than do all the buffering we insist the user code handle - * larger reads. As long as cp works... :) - */ - printk(KERN_ERR "scanlog: cannot perform a small read (%ld)\n", count); - return -EINVAL; - } - - if (!access_ok(VERIFY_WRITE, buf, count)) - return -EFAULT; - - for (;;) { - wait_time = 500; /* default wait if no data */ - spin_lock(&rtas_data_buf_lock); - memcpy(rtas_data_buf, data, RTAS_DATA_BUF_SIZE); - status = rtas_call(ibm_scan_log_dump, 2, 1, NULL, - (u32) __pa(rtas_data_buf), (u32) count); - memcpy(data, rtas_data_buf, RTAS_DATA_BUF_SIZE); - spin_unlock(&rtas_data_buf_lock); - - DEBUG("status=%d, data[0]=%x, data[1]=%x, data[2]=%x\n", - status, data[0], data[1], data[2]); - switch (status) { - case SCANLOG_COMPLETE: - DEBUG("hit eof\n"); - return 0; - case SCANLOG_HWERROR: - DEBUG("hardware error reading scan log data\n"); - return -EIO; - case SCANLOG_CONTINUE: - /* We may or may not have data yet */ - len = data[1]; - off = data[2]; - if (len > 0) { - if (copy_to_user(buf, ((char *)data)+off, len)) - return -EFAULT; - return len; - } - /* Break to sleep default time */ - break; - default: - if (status > 9900 && status <= 9905) { - wait_time = rtas_extended_busy_delay_time(status); - } else { - printk(KERN_ERR "scanlog: unknown error from rtas: %d\n", status); - return -EIO; - } - } - /* Apparently no data yet. Wait and try again. */ - msleep_interruptible(wait_time); - } - /*NOTREACHED*/ -} - -static ssize_t scanlog_write(struct file * file, const char __user * buf, - size_t count, loff_t *ppos) -{ - char stkbuf[20]; - int status; - - if (count > 19) count = 19; - if (copy_from_user (stkbuf, buf, count)) { - return -EFAULT; - } - stkbuf[count] = 0; - - if (buf) { - if (strncmp(stkbuf, "reset", 5) == 0) { - DEBUG("reset scanlog\n"); - status = rtas_call(ibm_scan_log_dump, 2, 1, NULL, 0, 0); - DEBUG("rtas returns %d\n", status); - } else if (strncmp(stkbuf, "debugon", 7) == 0) { - printk(KERN_ERR "scanlog: debug on\n"); - scanlog_debug = 1; - } else if (strncmp(stkbuf, "debugoff", 8) == 0) { - printk(KERN_ERR "scanlog: debug off\n"); - scanlog_debug = 0; - } - } - return count; -} - -static int scanlog_open(struct inode * inode, struct file * file) -{ - struct proc_dir_entry *dp = PDE(inode); - unsigned int *data = (unsigned int *)dp->data; - - if (!data) { - printk(KERN_ERR "scanlog: open failed no data\n"); - return -EIO; - } - - if (data[0] != 0) { - /* This imperfect test stops a second copy of the - * data (or a reset while data is being copied) - */ - return -EBUSY; - } - - data[0] = 0; /* re-init so we restart the scan */ - - return 0; -} - -static int scanlog_release(struct inode * inode, struct file * file) -{ - struct proc_dir_entry *dp = PDE(inode); - unsigned int *data = (unsigned int *)dp->data; - - if (!data) { - printk(KERN_ERR "scanlog: release failed no data\n"); - return -EIO; - } - data[0] = 0; - - return 0; -} - -struct file_operations scanlog_fops = { - .owner = THIS_MODULE, - .read = scanlog_read, - .write = scanlog_write, - .open = scanlog_open, - .release = scanlog_release, -}; - -int __init scanlog_init(void) -{ - struct proc_dir_entry *ent; - - ibm_scan_log_dump = rtas_token("ibm,scan-log-dump"); - if (ibm_scan_log_dump == RTAS_UNKNOWN_SERVICE) { - printk(KERN_ERR "scan-log-dump not implemented on this system\n"); - return -EIO; - } - - ent = create_proc_entry("ppc64/rtas/scan-log-dump", S_IRUSR, NULL); - if (ent) { - ent->proc_fops = &scanlog_fops; - /* Ideally we could allocate a buffer < 4G */ - ent->data = kmalloc(RTAS_DATA_BUF_SIZE, GFP_KERNEL); - if (!ent->data) { - printk(KERN_ERR "Failed to allocate a buffer\n"); - remove_proc_entry("scan-log-dump", ent->parent); - return -ENOMEM; - } - ((unsigned int *)ent->data)[0] = 0; - } else { - printk(KERN_ERR "Failed to create ppc64/scan-log-dump proc entry\n"); - return -EIO; - } - proc_ppc64_scan_log_dump = ent; - - return 0; -} - -void __exit scanlog_cleanup(void) -{ - if (proc_ppc64_scan_log_dump) { - kfree(proc_ppc64_scan_log_dump->data); - remove_proc_entry("scan-log-dump", proc_ppc64_scan_log_dump->parent); - } -} - -module_init(scanlog_init); -module_exit(scanlog_cleanup); -MODULE_LICENSE("GPL");