forked from Minki/linux
a94a14720e
ibm,validate-flash-image RTAS call output buffer contains 150 - 200 bytes of data on latest system. Presently we have output buffer size as 64 bytes and we use sprintf to copy data from RTAS buffer to local buffer. This causes kernel oops (see below call trace). This patch increases local buffer size to 256 and also uses snprintf instead of sprintf to copy data from RTAS buffer. Kernel call trace : ------------------- Oops: Kernel access of bad area, sig: 11 [#1] SMP NR_CPUS=1024 NUMA pSeries Modules linked in: nfs fscache lockd auth_rpcgss nfs_acl sunrpc fuse loop dm_mod ipv6 ipv6_lib usb_storage ehea(X) sr_mod qlge ses cdrom enclosure st be2net sg ext3 jbd mbcache usbhid hid ohci_hcd ehci_hcd usbcore qla2xxx usb_common sd_mod crc_t10dif scsi_dh_hp_sw scsi_dh_rdac scsi_dh_alua scsi_dh_emc scsi_dh lpfc scsi_transport_fc scsi_tgt ipr(X) libata scsi_mod Supported: Yes NIP: 4520323031333130 LR: 4520323031333130 CTR: 0000000000000000 REGS: c0000001b91779b0 TRAP: 0400 Tainted: G X (3.0.13-0.27-ppc64) MSR: 8000000040009032 <EE,ME,IR,DR> CR: 44022488 XER: 20000018 TASK = c0000001bca1aba0[4736] 'cat' THREAD: c0000001b9174000 CPU: 36 GPR00: 4520323031333130 c0000001b9177c30 c000000000f87c98 000000000000009b GPR04: c0000001b9177c4a 000000000000000b 3520323031333130 2032303133313031 GPR08: 3133313031350a4d 000000000000009b 0000000000000000 c0000000003664a4 GPR12: 0000000022022448 c000000003ee6c00 0000000000000002 00000000100e8a90 GPR16: 00000000100cb9d8 0000000010093370 000000001001d310 0000000000000000 GPR20: 0000000000008000 00000000100fae60 000000000000005e 0000000000000000 GPR24: 0000000010129350 46573738302e3030 2046573738302e30 300a4d4720323031 GPR28: 333130313520554e 4b4e4f574e0a4d47 2032303133313031 3520323031333130 NIP [4520323031333130] 0x4520323031333130 LR [4520323031333130] 0x4520323031333130 Call Trace: [c0000001b9177c30] [4520323031333130] 0x4520323031333130 (unreliable) Instruction dump: XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX Signed-off-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
780 lines
21 KiB
C
780 lines
21 KiB
C
/*
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* c 2001 PPC 64 Team, IBM Corp
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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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 <asm/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);
|
|
memcpy(rtas_data_buf, args_buf->buf, VALIDATE_BUF_SIZE);
|
|
rc = rtas_call(token, 2, 2, &update_results,
|
|
(u32) __pa(rtas_data_buf), args_buf->buf_size);
|
|
memcpy(args_buf->buf, rtas_data_buf, VALIDATE_BUF_SIZE);
|
|
spin_unlock(&rtas_data_buf_lock);
|
|
} while (rtas_busy_delay(rc));
|
|
|
|
args_buf->status = rc;
|
|
args_buf->update_results = update_results;
|
|
}
|
|
|
|
static int get_validate_flash_msg(struct rtas_validate_flash_t *args_buf,
|
|
char *msg, int msglen)
|
|
{
|
|
int n;
|
|
|
|
if (args_buf->status >= VALIDATE_TMP_UPDATE) {
|
|
n = sprintf(msg, "%d\n", args_buf->update_results);
|
|
if ((args_buf->update_results >= VALIDATE_CUR_UNKNOWN) ||
|
|
(args_buf->update_results == VALIDATE_TMP_UPDATE))
|
|
n += snprintf(msg + n, msglen - n, "%s\n",
|
|
args_buf->buf);
|
|
} else {
|
|
n = sprintf(msg, "%d\n", args_buf->status);
|
|
}
|
|
return n;
|
|
}
|
|
|
|
static ssize_t validate_flash_read(struct file *file, char __user *buf,
|
|
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(VERIFY_READ, 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 *)__pa(f->blocks[i].data);
|
|
image_size += f->blocks[i].length;
|
|
}
|
|
next = f->next;
|
|
/* Don't translate NULL pointer for last entry */
|
|
if (f->next)
|
|
f->next = (struct flash_block_list *)__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);
|
|
}
|
|
|
|
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 file_operations fops;
|
|
};
|
|
|
|
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,
|
|
.fops.read = rtas_flash_read_msg,
|
|
.fops.write = rtas_flash_write,
|
|
.fops.release = rtas_flash_release,
|
|
.fops.llseek = default_llseek,
|
|
},
|
|
{
|
|
.filename = "powerpc/rtas/" FIRMWARE_UPDATE_NAME,
|
|
.rtas_call_name = "ibm,update-flash-64-and-reboot",
|
|
.status = &rtas_update_flash_data.status,
|
|
.fops.read = rtas_flash_read_num,
|
|
.fops.write = rtas_flash_write,
|
|
.fops.release = rtas_flash_release,
|
|
.fops.llseek = default_llseek,
|
|
},
|
|
{
|
|
.filename = "powerpc/rtas/" VALIDATE_FLASH_NAME,
|
|
.rtas_call_name = "ibm,validate-flash-image",
|
|
.status = &rtas_validate_flash_data.status,
|
|
.fops.read = validate_flash_read,
|
|
.fops.write = validate_flash_write,
|
|
.fops.release = validate_flash_release,
|
|
.fops.llseek = default_llseek,
|
|
},
|
|
{
|
|
.filename = "powerpc/rtas/" MANAGE_FLASH_NAME,
|
|
.rtas_call_name = "ibm,manage-flash-image",
|
|
.status = &rtas_manage_flash_data.status,
|
|
.fops.read = manage_flash_read,
|
|
.fops.write = manage_flash_write,
|
|
.fops.llseek = 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 1;
|
|
}
|
|
|
|
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, S_IRUSR | S_IWUSR, NULL, &f->fops))
|
|
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");
|