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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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97a32539b9
The most notable change is DEFINE_SHOW_ATTRIBUTE macro split in seq_file.h. Conversion rule is: llseek => proc_lseek unlocked_ioctl => proc_ioctl xxx => proc_xxx delete ".owner = THIS_MODULE" line [akpm@linux-foundation.org: fix drivers/isdn/capi/kcapi_proc.c] [sfr@canb.auug.org.au: fix kernel/sched/psi.c] Link: http://lkml.kernel.org/r/20200122180545.36222f50@canb.auug.org.au Link: http://lkml.kernel.org/r/20191225172546.GB13378@avx2 Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
777 lines
21 KiB
C
777 lines
21 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* c 2001 PPC 64 Team, IBM Corp
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*
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* /proc/powerpc/rtas/firmware_flash interface
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*
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* This file implements a firmware_flash interface to pump a firmware
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* image into the kernel. At reboot time rtas_restart() will see the
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* firmware image and flash it as it reboots (see rtas.c).
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/proc_fs.h>
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#include <linux/reboot.h>
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#include <asm/delay.h>
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#include <linux/uaccess.h>
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#include <asm/rtas.h>
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#define MODULE_VERS "1.0"
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#define MODULE_NAME "rtas_flash"
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#define FIRMWARE_FLASH_NAME "firmware_flash"
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#define FIRMWARE_UPDATE_NAME "firmware_update"
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#define MANAGE_FLASH_NAME "manage_flash"
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#define VALIDATE_FLASH_NAME "validate_flash"
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/* General RTAS Status Codes */
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#define RTAS_RC_SUCCESS 0
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#define RTAS_RC_HW_ERR -1
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#define RTAS_RC_BUSY -2
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/* Flash image status values */
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#define FLASH_AUTH -9002 /* RTAS Not Service Authority Partition */
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#define FLASH_NO_OP -1099 /* No operation initiated by user */
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#define FLASH_IMG_SHORT -1005 /* Flash image shorter than expected */
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#define FLASH_IMG_BAD_LEN -1004 /* Bad length value in flash list block */
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#define FLASH_IMG_NULL_DATA -1003 /* Bad data value in flash list block */
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#define FLASH_IMG_READY 0 /* Firmware img ready for flash on reboot */
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/* Manage image status values */
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#define MANAGE_AUTH -9002 /* RTAS Not Service Authority Partition */
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#define MANAGE_ACTIVE_ERR -9001 /* RTAS Cannot Overwrite Active Img */
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#define MANAGE_NO_OP -1099 /* No operation initiated by user */
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#define MANAGE_PARAM_ERR -3 /* RTAS Parameter Error */
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#define MANAGE_HW_ERR -1 /* RTAS Hardware Error */
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/* Validate image status values */
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#define VALIDATE_AUTH -9002 /* RTAS Not Service Authority Partition */
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#define VALIDATE_NO_OP -1099 /* No operation initiated by the user */
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#define VALIDATE_INCOMPLETE -1002 /* User copied < VALIDATE_BUF_SIZE */
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#define VALIDATE_READY -1001 /* Firmware image ready for validation */
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#define VALIDATE_PARAM_ERR -3 /* RTAS Parameter Error */
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#define VALIDATE_HW_ERR -1 /* RTAS Hardware Error */
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/* ibm,validate-flash-image update result tokens */
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#define VALIDATE_TMP_UPDATE 0 /* T side will be updated */
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#define VALIDATE_FLASH_AUTH 1 /* Partition does not have authority */
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#define VALIDATE_INVALID_IMG 2 /* Candidate image is not valid */
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#define VALIDATE_CUR_UNKNOWN 3 /* Current fixpack level is unknown */
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/*
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* Current T side will be committed to P side before being replace with new
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* image, and the new image is downlevel from current image
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*/
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#define VALIDATE_TMP_COMMIT_DL 4
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/*
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* Current T side will be committed to P side before being replaced with new
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* image
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*/
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#define VALIDATE_TMP_COMMIT 5
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/*
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* T side will be updated with a downlevel image
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*/
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#define VALIDATE_TMP_UPDATE_DL 6
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/*
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* The candidate image's release date is later than the system's firmware
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* service entitlement date - service warranty period has expired
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*/
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#define VALIDATE_OUT_OF_WRNTY 7
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/* ibm,manage-flash-image operation tokens */
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#define RTAS_REJECT_TMP_IMG 0
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#define RTAS_COMMIT_TMP_IMG 1
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/* Array sizes */
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#define VALIDATE_BUF_SIZE 4096
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#define VALIDATE_MSG_LEN 256
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#define RTAS_MSG_MAXLEN 64
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/* Quirk - RTAS requires 4k list length and block size */
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#define RTAS_BLKLIST_LENGTH 4096
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#define RTAS_BLK_SIZE 4096
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struct flash_block {
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char *data;
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unsigned long length;
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};
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/* This struct is very similar but not identical to
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* that needed by the rtas flash update.
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* All we need to do for rtas is rewrite num_blocks
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* into a version/length and translate the pointers
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* to absolute.
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*/
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#define FLASH_BLOCKS_PER_NODE ((RTAS_BLKLIST_LENGTH - 16) / sizeof(struct flash_block))
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struct flash_block_list {
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unsigned long num_blocks;
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struct flash_block_list *next;
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struct flash_block blocks[FLASH_BLOCKS_PER_NODE];
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};
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static struct flash_block_list *rtas_firmware_flash_list;
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/* Use slab cache to guarantee 4k alignment */
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static struct kmem_cache *flash_block_cache = NULL;
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#define FLASH_BLOCK_LIST_VERSION (1UL)
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/*
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* Local copy of the flash block list.
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*
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* The rtas_firmware_flash_list varable will be
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* set once the data is fully read.
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*
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* For convenience as we build the list we use virtual addrs,
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* we do not fill in the version number, and the length field
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* is treated as the number of entries currently in the block
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* (i.e. not a byte count). This is all fixed when calling
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* the flash routine.
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*/
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/* Status int must be first member of struct */
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struct rtas_update_flash_t
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{
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int status; /* Flash update status */
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struct flash_block_list *flist; /* Local copy of flash block list */
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};
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/* Status int must be first member of struct */
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struct rtas_manage_flash_t
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{
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int status; /* Returned status */
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};
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/* Status int must be first member of struct */
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struct rtas_validate_flash_t
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{
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int status; /* Returned status */
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char *buf; /* Candidate image buffer */
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unsigned int buf_size; /* Size of image buf */
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unsigned int update_results; /* Update results token */
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};
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static struct rtas_update_flash_t rtas_update_flash_data;
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static struct rtas_manage_flash_t rtas_manage_flash_data;
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static struct rtas_validate_flash_t rtas_validate_flash_data;
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static DEFINE_MUTEX(rtas_update_flash_mutex);
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static DEFINE_MUTEX(rtas_manage_flash_mutex);
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static DEFINE_MUTEX(rtas_validate_flash_mutex);
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/* Do simple sanity checks on the flash image. */
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static int flash_list_valid(struct flash_block_list *flist)
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{
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struct flash_block_list *f;
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int i;
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unsigned long block_size, image_size;
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/* Paranoid self test here. We also collect the image size. */
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image_size = 0;
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for (f = flist; f; f = f->next) {
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for (i = 0; i < f->num_blocks; i++) {
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if (f->blocks[i].data == NULL) {
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return FLASH_IMG_NULL_DATA;
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}
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block_size = f->blocks[i].length;
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if (block_size <= 0 || block_size > RTAS_BLK_SIZE) {
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return FLASH_IMG_BAD_LEN;
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}
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image_size += block_size;
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}
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}
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if (image_size < (256 << 10)) {
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if (image_size < 2)
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return FLASH_NO_OP;
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}
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printk(KERN_INFO "FLASH: flash image with %ld bytes stored for hardware flash on reboot\n", image_size);
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return FLASH_IMG_READY;
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}
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static void free_flash_list(struct flash_block_list *f)
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{
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struct flash_block_list *next;
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int i;
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while (f) {
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for (i = 0; i < f->num_blocks; i++)
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kmem_cache_free(flash_block_cache, f->blocks[i].data);
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next = f->next;
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kmem_cache_free(flash_block_cache, f);
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f = next;
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}
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}
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static int rtas_flash_release(struct inode *inode, struct file *file)
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{
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struct rtas_update_flash_t *const uf = &rtas_update_flash_data;
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mutex_lock(&rtas_update_flash_mutex);
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if (uf->flist) {
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/* File was opened in write mode for a new flash attempt */
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/* Clear saved list */
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if (rtas_firmware_flash_list) {
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free_flash_list(rtas_firmware_flash_list);
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rtas_firmware_flash_list = NULL;
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}
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if (uf->status != FLASH_AUTH)
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uf->status = flash_list_valid(uf->flist);
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if (uf->status == FLASH_IMG_READY)
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rtas_firmware_flash_list = uf->flist;
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else
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free_flash_list(uf->flist);
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uf->flist = NULL;
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}
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mutex_unlock(&rtas_update_flash_mutex);
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return 0;
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}
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static size_t get_flash_status_msg(int status, char *buf)
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{
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const char *msg;
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size_t len;
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switch (status) {
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case FLASH_AUTH:
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msg = "error: this partition does not have service authority\n";
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break;
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case FLASH_NO_OP:
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msg = "info: no firmware image for flash\n";
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break;
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case FLASH_IMG_SHORT:
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msg = "error: flash image short\n";
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break;
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case FLASH_IMG_BAD_LEN:
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msg = "error: internal error bad length\n";
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break;
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case FLASH_IMG_NULL_DATA:
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msg = "error: internal error null data\n";
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break;
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case FLASH_IMG_READY:
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msg = "ready: firmware image ready for flash on reboot\n";
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break;
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default:
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return sprintf(buf, "error: unexpected status value %d\n",
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status);
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}
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len = strlen(msg);
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memcpy(buf, msg, len + 1);
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return len;
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}
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/* Reading the proc file will show status (not the firmware contents) */
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static ssize_t rtas_flash_read_msg(struct file *file, char __user *buf,
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size_t count, loff_t *ppos)
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{
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struct rtas_update_flash_t *const uf = &rtas_update_flash_data;
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char msg[RTAS_MSG_MAXLEN];
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size_t len;
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int status;
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mutex_lock(&rtas_update_flash_mutex);
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status = uf->status;
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mutex_unlock(&rtas_update_flash_mutex);
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/* Read as text message */
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len = get_flash_status_msg(status, msg);
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return simple_read_from_buffer(buf, count, ppos, msg, len);
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}
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static ssize_t rtas_flash_read_num(struct file *file, char __user *buf,
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size_t count, loff_t *ppos)
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{
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struct rtas_update_flash_t *const uf = &rtas_update_flash_data;
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char msg[RTAS_MSG_MAXLEN];
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int status;
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mutex_lock(&rtas_update_flash_mutex);
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status = uf->status;
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mutex_unlock(&rtas_update_flash_mutex);
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/* Read as number */
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sprintf(msg, "%d\n", status);
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return simple_read_from_buffer(buf, count, ppos, msg, strlen(msg));
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}
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/* We could be much more efficient here. But to keep this function
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* simple we allocate a page to the block list no matter how small the
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* count is. If the system is low on memory it will be just as well
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* that we fail....
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*/
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static ssize_t rtas_flash_write(struct file *file, const char __user *buffer,
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size_t count, loff_t *off)
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{
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struct rtas_update_flash_t *const uf = &rtas_update_flash_data;
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char *p;
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int next_free, rc;
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struct flash_block_list *fl;
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mutex_lock(&rtas_update_flash_mutex);
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if (uf->status == FLASH_AUTH || count == 0)
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goto out; /* discard data */
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/* In the case that the image is not ready for flashing, the memory
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* allocated for the block list will be freed upon the release of the
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* proc file
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*/
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if (uf->flist == NULL) {
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uf->flist = kmem_cache_zalloc(flash_block_cache, GFP_KERNEL);
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if (!uf->flist)
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goto nomem;
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}
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fl = uf->flist;
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while (fl->next)
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fl = fl->next; /* seek to last block_list for append */
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next_free = fl->num_blocks;
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if (next_free == FLASH_BLOCKS_PER_NODE) {
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/* Need to allocate another block_list */
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fl->next = kmem_cache_zalloc(flash_block_cache, GFP_KERNEL);
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if (!fl->next)
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goto nomem;
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fl = fl->next;
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next_free = 0;
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}
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if (count > RTAS_BLK_SIZE)
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count = RTAS_BLK_SIZE;
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p = kmem_cache_zalloc(flash_block_cache, GFP_KERNEL);
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if (!p)
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goto nomem;
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if(copy_from_user(p, buffer, count)) {
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kmem_cache_free(flash_block_cache, p);
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rc = -EFAULT;
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goto error;
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}
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fl->blocks[next_free].data = p;
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fl->blocks[next_free].length = count;
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fl->num_blocks++;
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out:
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mutex_unlock(&rtas_update_flash_mutex);
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return count;
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nomem:
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rc = -ENOMEM;
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error:
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mutex_unlock(&rtas_update_flash_mutex);
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return rc;
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}
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/*
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* Flash management routines.
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*/
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static void manage_flash(struct rtas_manage_flash_t *args_buf, unsigned int op)
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{
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s32 rc;
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do {
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rc = rtas_call(rtas_token("ibm,manage-flash-image"), 1, 1,
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NULL, op);
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} while (rtas_busy_delay(rc));
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args_buf->status = rc;
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}
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static ssize_t manage_flash_read(struct file *file, char __user *buf,
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size_t count, loff_t *ppos)
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{
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struct rtas_manage_flash_t *const args_buf = &rtas_manage_flash_data;
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char msg[RTAS_MSG_MAXLEN];
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int msglen, status;
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mutex_lock(&rtas_manage_flash_mutex);
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status = args_buf->status;
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mutex_unlock(&rtas_manage_flash_mutex);
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msglen = sprintf(msg, "%d\n", status);
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return simple_read_from_buffer(buf, count, ppos, msg, msglen);
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}
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static ssize_t manage_flash_write(struct file *file, const char __user *buf,
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size_t count, loff_t *off)
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{
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struct rtas_manage_flash_t *const args_buf = &rtas_manage_flash_data;
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static const char reject_str[] = "0";
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static const char commit_str[] = "1";
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char stkbuf[10];
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int op, rc;
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mutex_lock(&rtas_manage_flash_mutex);
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if ((args_buf->status == MANAGE_AUTH) || (count == 0))
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goto out;
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op = -1;
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if (buf) {
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if (count > 9) count = 9;
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rc = -EFAULT;
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if (copy_from_user (stkbuf, buf, count))
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goto error;
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if (strncmp(stkbuf, reject_str, strlen(reject_str)) == 0)
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op = RTAS_REJECT_TMP_IMG;
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else if (strncmp(stkbuf, commit_str, strlen(commit_str)) == 0)
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op = RTAS_COMMIT_TMP_IMG;
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}
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if (op == -1) { /* buf is empty, or contains invalid string */
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rc = -EINVAL;
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goto error;
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}
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manage_flash(args_buf, op);
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out:
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mutex_unlock(&rtas_manage_flash_mutex);
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return count;
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error:
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mutex_unlock(&rtas_manage_flash_mutex);
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return rc;
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}
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/*
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* Validation routines.
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*/
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static void validate_flash(struct rtas_validate_flash_t *args_buf)
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{
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int token = rtas_token("ibm,validate-flash-image");
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int update_results;
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s32 rc;
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rc = 0;
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do {
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spin_lock(&rtas_data_buf_lock);
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memcpy(rtas_data_buf, args_buf->buf, VALIDATE_BUF_SIZE);
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rc = rtas_call(token, 2, 2, &update_results,
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(u32) __pa(rtas_data_buf), args_buf->buf_size);
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memcpy(args_buf->buf, rtas_data_buf, VALIDATE_BUF_SIZE);
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spin_unlock(&rtas_data_buf_lock);
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} while (rtas_busy_delay(rc));
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args_buf->status = rc;
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args_buf->update_results = update_results;
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}
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static int get_validate_flash_msg(struct rtas_validate_flash_t *args_buf,
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char *msg, int msglen)
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{
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int n;
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if (args_buf->status >= VALIDATE_TMP_UPDATE) {
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n = sprintf(msg, "%d\n", args_buf->update_results);
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if ((args_buf->update_results >= VALIDATE_CUR_UNKNOWN) ||
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(args_buf->update_results == VALIDATE_TMP_UPDATE))
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n += snprintf(msg + n, msglen - n, "%s\n",
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args_buf->buf);
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} else {
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n = sprintf(msg, "%d\n", args_buf->status);
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}
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return n;
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}
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static ssize_t validate_flash_read(struct file *file, char __user *buf,
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size_t count, loff_t *ppos)
|
|
{
|
|
struct rtas_validate_flash_t *const args_buf =
|
|
&rtas_validate_flash_data;
|
|
char msg[VALIDATE_MSG_LEN];
|
|
int msglen;
|
|
|
|
mutex_lock(&rtas_validate_flash_mutex);
|
|
msglen = get_validate_flash_msg(args_buf, msg, VALIDATE_MSG_LEN);
|
|
mutex_unlock(&rtas_validate_flash_mutex);
|
|
|
|
return simple_read_from_buffer(buf, count, ppos, msg, msglen);
|
|
}
|
|
|
|
static ssize_t validate_flash_write(struct file *file, const char __user *buf,
|
|
size_t count, loff_t *off)
|
|
{
|
|
struct rtas_validate_flash_t *const args_buf =
|
|
&rtas_validate_flash_data;
|
|
int rc;
|
|
|
|
mutex_lock(&rtas_validate_flash_mutex);
|
|
|
|
/* We are only interested in the first 4K of the
|
|
* candidate image */
|
|
if ((*off >= VALIDATE_BUF_SIZE) ||
|
|
(args_buf->status == VALIDATE_AUTH)) {
|
|
*off += count;
|
|
mutex_unlock(&rtas_validate_flash_mutex);
|
|
return count;
|
|
}
|
|
|
|
if (*off + count >= VALIDATE_BUF_SIZE) {
|
|
count = VALIDATE_BUF_SIZE - *off;
|
|
args_buf->status = VALIDATE_READY;
|
|
} else {
|
|
args_buf->status = VALIDATE_INCOMPLETE;
|
|
}
|
|
|
|
if (!access_ok(buf, count)) {
|
|
rc = -EFAULT;
|
|
goto done;
|
|
}
|
|
if (copy_from_user(args_buf->buf + *off, buf, count)) {
|
|
rc = -EFAULT;
|
|
goto done;
|
|
}
|
|
|
|
*off += count;
|
|
rc = count;
|
|
done:
|
|
mutex_unlock(&rtas_validate_flash_mutex);
|
|
return rc;
|
|
}
|
|
|
|
static int validate_flash_release(struct inode *inode, struct file *file)
|
|
{
|
|
struct rtas_validate_flash_t *const args_buf =
|
|
&rtas_validate_flash_data;
|
|
|
|
mutex_lock(&rtas_validate_flash_mutex);
|
|
|
|
if (args_buf->status == VALIDATE_READY) {
|
|
args_buf->buf_size = VALIDATE_BUF_SIZE;
|
|
validate_flash(args_buf);
|
|
}
|
|
|
|
mutex_unlock(&rtas_validate_flash_mutex);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* On-reboot flash update applicator.
|
|
*/
|
|
static void rtas_flash_firmware(int reboot_type)
|
|
{
|
|
unsigned long image_size;
|
|
struct flash_block_list *f, *next, *flist;
|
|
unsigned long rtas_block_list;
|
|
int i, status, update_token;
|
|
|
|
if (rtas_firmware_flash_list == NULL)
|
|
return; /* nothing to do */
|
|
|
|
if (reboot_type != SYS_RESTART) {
|
|
printk(KERN_ALERT "FLASH: firmware flash requires a reboot\n");
|
|
printk(KERN_ALERT "FLASH: the firmware image will NOT be flashed\n");
|
|
return;
|
|
}
|
|
|
|
update_token = rtas_token("ibm,update-flash-64-and-reboot");
|
|
if (update_token == RTAS_UNKNOWN_SERVICE) {
|
|
printk(KERN_ALERT "FLASH: ibm,update-flash-64-and-reboot "
|
|
"is not available -- not a service partition?\n");
|
|
printk(KERN_ALERT "FLASH: firmware will not be flashed\n");
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Just before starting the firmware flash, cancel the event scan work
|
|
* to avoid any soft lockup issues.
|
|
*/
|
|
rtas_cancel_event_scan();
|
|
|
|
/*
|
|
* NOTE: the "first" block must be under 4GB, so we create
|
|
* an entry with no data blocks in the reserved buffer in
|
|
* the kernel data segment.
|
|
*/
|
|
spin_lock(&rtas_data_buf_lock);
|
|
flist = (struct flash_block_list *)&rtas_data_buf[0];
|
|
flist->num_blocks = 0;
|
|
flist->next = rtas_firmware_flash_list;
|
|
rtas_block_list = __pa(flist);
|
|
if (rtas_block_list >= 4UL*1024*1024*1024) {
|
|
printk(KERN_ALERT "FLASH: kernel bug...flash list header addr above 4GB\n");
|
|
spin_unlock(&rtas_data_buf_lock);
|
|
return;
|
|
}
|
|
|
|
printk(KERN_ALERT "FLASH: preparing saved firmware image for flash\n");
|
|
/* Update the block_list in place. */
|
|
rtas_firmware_flash_list = NULL; /* too hard to backout on error */
|
|
image_size = 0;
|
|
for (f = flist; f; f = next) {
|
|
/* Translate data addrs to absolute */
|
|
for (i = 0; i < f->num_blocks; i++) {
|
|
f->blocks[i].data = (char *)cpu_to_be64(__pa(f->blocks[i].data));
|
|
image_size += f->blocks[i].length;
|
|
f->blocks[i].length = cpu_to_be64(f->blocks[i].length);
|
|
}
|
|
next = f->next;
|
|
/* Don't translate NULL pointer for last entry */
|
|
if (f->next)
|
|
f->next = (struct flash_block_list *)cpu_to_be64(__pa(f->next));
|
|
else
|
|
f->next = NULL;
|
|
/* make num_blocks into the version/length field */
|
|
f->num_blocks = (FLASH_BLOCK_LIST_VERSION << 56) | ((f->num_blocks+1)*16);
|
|
f->num_blocks = cpu_to_be64(f->num_blocks);
|
|
}
|
|
|
|
printk(KERN_ALERT "FLASH: flash image is %ld bytes\n", image_size);
|
|
printk(KERN_ALERT "FLASH: performing flash and reboot\n");
|
|
rtas_progress("Flashing \n", 0x0);
|
|
rtas_progress("Please Wait... ", 0x0);
|
|
printk(KERN_ALERT "FLASH: this will take several minutes. Do not power off!\n");
|
|
status = rtas_call(update_token, 1, 1, NULL, rtas_block_list);
|
|
switch (status) { /* should only get "bad" status */
|
|
case 0:
|
|
printk(KERN_ALERT "FLASH: success\n");
|
|
break;
|
|
case -1:
|
|
printk(KERN_ALERT "FLASH: hardware error. Firmware may not be not flashed\n");
|
|
break;
|
|
case -3:
|
|
printk(KERN_ALERT "FLASH: image is corrupt or not correct for this platform. Firmware not flashed\n");
|
|
break;
|
|
case -4:
|
|
printk(KERN_ALERT "FLASH: flash failed when partially complete. System may not reboot\n");
|
|
break;
|
|
default:
|
|
printk(KERN_ALERT "FLASH: unknown flash return code %d\n", status);
|
|
break;
|
|
}
|
|
spin_unlock(&rtas_data_buf_lock);
|
|
}
|
|
|
|
/*
|
|
* Manifest of proc files to create
|
|
*/
|
|
struct rtas_flash_file {
|
|
const char *filename;
|
|
const char *rtas_call_name;
|
|
int *status;
|
|
const struct proc_ops ops;
|
|
};
|
|
|
|
static const struct rtas_flash_file rtas_flash_files[] = {
|
|
{
|
|
.filename = "powerpc/rtas/" FIRMWARE_FLASH_NAME,
|
|
.rtas_call_name = "ibm,update-flash-64-and-reboot",
|
|
.status = &rtas_update_flash_data.status,
|
|
.ops.proc_read = rtas_flash_read_msg,
|
|
.ops.proc_write = rtas_flash_write,
|
|
.ops.proc_release = rtas_flash_release,
|
|
.ops.proc_lseek = default_llseek,
|
|
},
|
|
{
|
|
.filename = "powerpc/rtas/" FIRMWARE_UPDATE_NAME,
|
|
.rtas_call_name = "ibm,update-flash-64-and-reboot",
|
|
.status = &rtas_update_flash_data.status,
|
|
.ops.proc_read = rtas_flash_read_num,
|
|
.ops.proc_write = rtas_flash_write,
|
|
.ops.proc_release = rtas_flash_release,
|
|
.ops.proc_lseek = default_llseek,
|
|
},
|
|
{
|
|
.filename = "powerpc/rtas/" VALIDATE_FLASH_NAME,
|
|
.rtas_call_name = "ibm,validate-flash-image",
|
|
.status = &rtas_validate_flash_data.status,
|
|
.ops.proc_read = validate_flash_read,
|
|
.ops.proc_write = validate_flash_write,
|
|
.ops.proc_release = validate_flash_release,
|
|
.ops.proc_lseek = default_llseek,
|
|
},
|
|
{
|
|
.filename = "powerpc/rtas/" MANAGE_FLASH_NAME,
|
|
.rtas_call_name = "ibm,manage-flash-image",
|
|
.status = &rtas_manage_flash_data.status,
|
|
.ops.proc_read = manage_flash_read,
|
|
.ops.proc_write = manage_flash_write,
|
|
.ops.proc_lseek = default_llseek,
|
|
}
|
|
};
|
|
|
|
static int __init rtas_flash_init(void)
|
|
{
|
|
int i;
|
|
|
|
if (rtas_token("ibm,update-flash-64-and-reboot") ==
|
|
RTAS_UNKNOWN_SERVICE) {
|
|
pr_info("rtas_flash: no firmware flash support\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
rtas_validate_flash_data.buf = kzalloc(VALIDATE_BUF_SIZE, GFP_KERNEL);
|
|
if (!rtas_validate_flash_data.buf)
|
|
return -ENOMEM;
|
|
|
|
flash_block_cache = kmem_cache_create("rtas_flash_cache",
|
|
RTAS_BLK_SIZE, RTAS_BLK_SIZE, 0,
|
|
NULL);
|
|
if (!flash_block_cache) {
|
|
printk(KERN_ERR "%s: failed to create block cache\n",
|
|
__func__);
|
|
goto enomem_buf;
|
|
}
|
|
|
|
for (i = 0; i < ARRAY_SIZE(rtas_flash_files); i++) {
|
|
const struct rtas_flash_file *f = &rtas_flash_files[i];
|
|
int token;
|
|
|
|
if (!proc_create(f->filename, 0600, NULL, &f->ops))
|
|
goto enomem;
|
|
|
|
/*
|
|
* This code assumes that the status int is the first member of the
|
|
* struct
|
|
*/
|
|
token = rtas_token(f->rtas_call_name);
|
|
if (token == RTAS_UNKNOWN_SERVICE)
|
|
*f->status = FLASH_AUTH;
|
|
else
|
|
*f->status = FLASH_NO_OP;
|
|
}
|
|
|
|
rtas_flash_term_hook = rtas_flash_firmware;
|
|
return 0;
|
|
|
|
enomem:
|
|
while (--i >= 0) {
|
|
const struct rtas_flash_file *f = &rtas_flash_files[i];
|
|
remove_proc_entry(f->filename, NULL);
|
|
}
|
|
|
|
kmem_cache_destroy(flash_block_cache);
|
|
enomem_buf:
|
|
kfree(rtas_validate_flash_data.buf);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
static void __exit rtas_flash_cleanup(void)
|
|
{
|
|
int i;
|
|
|
|
rtas_flash_term_hook = NULL;
|
|
|
|
if (rtas_firmware_flash_list) {
|
|
free_flash_list(rtas_firmware_flash_list);
|
|
rtas_firmware_flash_list = NULL;
|
|
}
|
|
|
|
for (i = 0; i < ARRAY_SIZE(rtas_flash_files); i++) {
|
|
const struct rtas_flash_file *f = &rtas_flash_files[i];
|
|
remove_proc_entry(f->filename, NULL);
|
|
}
|
|
|
|
kmem_cache_destroy(flash_block_cache);
|
|
kfree(rtas_validate_flash_data.buf);
|
|
}
|
|
|
|
module_init(rtas_flash_init);
|
|
module_exit(rtas_flash_cleanup);
|
|
MODULE_LICENSE("GPL");
|