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![Simon Glass](/assets/img/avatar_default.png)
Move this out of the common header and include it only where needed. In a number of cases this requires adding "struct udevice;" to avoid adding another large header or in other cases replacing / adding missing header files that had been pulled in, very indirectly. Finally, we have a few cases where we did not need to include <asm/global_data.h> at all, so remove that include. Signed-off-by: Simon Glass <sjg@chromium.org> Signed-off-by: Tom Rini <trini@konsulko.com>
546 lines
16 KiB
C
546 lines
16 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright © 2019 Collabora Ltd
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*/
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#include <config.h>
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#include <command.h>
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#include <fdtdec.h>
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#include <fs.h>
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#include <log.h>
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#include <mapmem.h>
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#include <memalign.h>
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#include <part.h>
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struct persistent_ram_buffer {
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u32 sig;
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u32 start;
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u32 size;
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u8 data[0];
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};
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#define PERSISTENT_RAM_SIG (0x43474244) /* DBGC */
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#define RAMOOPS_KERNMSG_HDR "===="
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#define PSTORE_TYPE_DMESG 0
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#define PSTORE_TYPE_CONSOLE 2
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#define PSTORE_TYPE_FTRACE 3
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#define PSTORE_TYPE_PMSG 7
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#define PSTORE_TYPE_ALL 255
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static phys_addr_t pstore_addr = CONFIG_CMD_PSTORE_MEM_ADDR;
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static phys_size_t pstore_length = CONFIG_CMD_PSTORE_MEM_SIZE;
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static unsigned int pstore_record_size = CONFIG_CMD_PSTORE_RECORD_SIZE;
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static unsigned int pstore_console_size = CONFIG_CMD_PSTORE_CONSOLE_SIZE;
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static unsigned int pstore_ftrace_size = CONFIG_CMD_PSTORE_FTRACE_SIZE;
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static unsigned int pstore_pmsg_size = CONFIG_CMD_PSTORE_PMSG_SIZE;
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static unsigned int pstore_ecc_size = CONFIG_CMD_PSTORE_ECC_SIZE;
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static unsigned int buffer_size;
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/**
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* pstore_read_kmsg_hdr() - Check kernel header and get compression flag if
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* available.
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* @buffer: Kernel messages buffer.
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* @compressed: Returns TRUE if kernel buffer is compressed, else FALSE.
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*
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* Check if buffer starts with a kernel header of the form:
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* ====<secs>.<nsecs>[-<compression>]\n
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* If <compression> is equal to 'C' then the buffer is compressed, else iter
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* should be 'D'.
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*
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* Return: Length of kernel header.
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*/
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static int pstore_read_kmsg_hdr(char *buffer, bool *compressed)
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{
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char *ptr = buffer;
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*compressed = false;
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if (strncmp(RAMOOPS_KERNMSG_HDR, ptr, strlen(RAMOOPS_KERNMSG_HDR)) != 0)
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return 0;
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ptr += strlen(RAMOOPS_KERNMSG_HDR);
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ptr = strchr(ptr, '\n');
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if (!ptr)
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return 0;
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if (ptr[-2] == '-' && ptr[-1] == 'C')
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*compressed = true;
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return ptr - buffer + 1;
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}
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/**
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* pstore_get_buffer() - Get unwrapped record buffer
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* @sig: Signature to check
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* @buffer: Buffer containing wrapped record
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* @size: wrapped record size
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* @dest: Buffer used to store unwrapped record
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*
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* The record starts with <signature><start><size> header.
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* The signature is 'DBGC' for all records except for Ftrace's record(s) wich
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* use LINUX_VERSION_CODE ^ 'DBGC'.
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* Use 0 for @sig to prevent checking signature.
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* Start and size are 4 bytes long.
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*
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* Return: record's length
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*/
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static u32 pstore_get_buffer(u32 sig, phys_addr_t buffer, u32 size, char *dest)
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{
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struct persistent_ram_buffer *prb =
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(struct persistent_ram_buffer *)map_sysmem(buffer, size);
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u32 dest_size;
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if (sig == 0 || prb->sig == sig) {
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if (prb->size == 0) {
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log_debug("found existing empty buffer\n");
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return 0;
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}
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if (prb->size > size) {
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log_debug("found existing invalid buffer, size %u, start %u\n",
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prb->size, prb->start);
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return 0;
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}
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} else {
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log_debug("no valid data in buffer (sig = 0x%08x)\n", prb->sig);
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return 0;
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}
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log_debug("found existing buffer, size %u, start %u\n",
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prb->size, prb->start);
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memcpy(dest, &prb->data[prb->start], prb->size - prb->start);
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memcpy(dest + prb->size - prb->start, &prb->data[0], prb->start);
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dest_size = prb->size;
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unmap_sysmem(prb);
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return dest_size;
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}
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/**
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* pstore_init_buffer_size() - Init buffer size to largest record size
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*
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* Records, console, FTrace and user logs can use different buffer sizes.
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* This function allows to retrieve the biggest one.
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*/
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static void pstore_init_buffer_size(void)
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{
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if (pstore_record_size > buffer_size)
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buffer_size = pstore_record_size;
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if (pstore_console_size > buffer_size)
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buffer_size = pstore_console_size;
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if (pstore_ftrace_size > buffer_size)
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buffer_size = pstore_ftrace_size;
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if (pstore_pmsg_size > buffer_size)
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buffer_size = pstore_pmsg_size;
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}
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/**
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* pstore_set() - Initialize PStore settings from command line arguments
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* @cmdtp: Command data struct pointer
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* @flag: Command flag
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* @argc: Command-line argument count
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* @argv: Array of command-line arguments
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*
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* Set pstore reserved memory info, starting at 'addr' for 'len' bytes.
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* Default length for records is 4K.
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* Mandatory arguments:
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* - addr: ramoops starting address
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* - len: ramoops total length
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* Optional arguments:
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* - record-size: size of one panic or oops record ('dump' type)
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* - console-size: size of the kernel logs record
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* - ftrace-size: size of the ftrace record(s), this can be a single record or
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* divided in parts based on number of CPUs
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* - pmsg-size: size of the user space logs record
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* - ecc-size: enables/disables ECC support and specifies ECC buffer size in
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* bytes (0 disables it, 1 is a special value, means 16 bytes ECC)
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*
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* Return: zero on success, CMD_RET_USAGE in case of misuse and negative
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* on error.
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*/
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static int pstore_set(struct cmd_tbl *cmdtp, int flag, int argc,
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char * const argv[])
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{
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if (argc < 3)
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return CMD_RET_USAGE;
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/* Address is specified since argc > 2
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*/
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pstore_addr = simple_strtoul(argv[1], NULL, 16);
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/* Length is specified since argc > 2
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*/
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pstore_length = simple_strtoul(argv[2], NULL, 16);
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if (argc > 3)
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pstore_record_size = simple_strtoul(argv[3], NULL, 16);
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if (argc > 4)
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pstore_console_size = simple_strtoul(argv[4], NULL, 16);
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if (argc > 5)
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pstore_ftrace_size = simple_strtoul(argv[5], NULL, 16);
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if (argc > 6)
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pstore_pmsg_size = simple_strtoul(argv[6], NULL, 16);
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if (argc > 7)
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pstore_ecc_size = simple_strtoul(argv[7], NULL, 16);
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if (pstore_length < (pstore_record_size + pstore_console_size
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+ pstore_ftrace_size + pstore_pmsg_size)) {
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printf("pstore <len> should be larger than the sum of all records sizes\n");
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pstore_length = 0;
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}
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log_debug("pstore set done: start 0x%08llx - length 0x%llx\n",
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(unsigned long long)pstore_addr,
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(unsigned long long)pstore_length);
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return 0;
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}
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/**
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* pstore_print_buffer() - Print buffer
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* @type: buffer type
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* @buffer: buffer to print
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* @size: buffer size
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*
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* Print buffer type and content
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*/
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static void pstore_print_buffer(char *type, char *buffer, u32 size)
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{
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u32 i = 0;
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printf("**** %s\n", type);
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while (i < size && buffer[i] != 0) {
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putc(buffer[i]);
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i++;
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}
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}
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/**
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* pstore_display() - Display existing records in pstore reserved memory
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* @cmdtp: Command data struct pointer
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* @flag: Command flag
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* @argc: Command-line argument count
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* @argv: Array of command-line arguments
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*
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* A 'record-type' can be given to only display records of this kind.
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* If no 'record-type' is given, all valid records are dispayed.
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* 'record-type' can be one of 'dump', 'console', 'ftrace' or 'user'. For 'dump'
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* and 'ftrace' types, a 'nb' can be given to only display one record.
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*
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* Return: zero on success, CMD_RET_USAGE in case of misuse and negative
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* on error.
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*/
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static int pstore_display(struct cmd_tbl *cmdtp, int flag, int argc,
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char * const argv[])
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{
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int type = PSTORE_TYPE_ALL;
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phys_addr_t ptr;
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char *buffer;
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u32 size;
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int header_len = 0;
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bool compressed;
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if (argc > 1) {
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if (!strcmp(argv[1], "dump"))
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type = PSTORE_TYPE_DMESG;
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else if (!strcmp(argv[1], "console"))
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type = PSTORE_TYPE_CONSOLE;
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else if (!strcmp(argv[1], "ftrace"))
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type = PSTORE_TYPE_FTRACE;
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else if (!strcmp(argv[1], "user"))
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type = PSTORE_TYPE_PMSG;
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else
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return CMD_RET_USAGE;
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}
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if (pstore_length == 0) {
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printf("Please set PStore configuration\n");
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return CMD_RET_USAGE;
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}
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if (buffer_size == 0)
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pstore_init_buffer_size();
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buffer = malloc_cache_aligned(buffer_size);
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if (type == PSTORE_TYPE_DMESG || type == PSTORE_TYPE_ALL) {
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ptr = pstore_addr;
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phys_addr_t ptr_end = ptr + pstore_length - pstore_pmsg_size
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- pstore_ftrace_size - pstore_console_size;
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if (argc > 2) {
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ptr += simple_strtoul(argv[2], NULL, 10)
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* pstore_record_size;
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ptr_end = ptr + pstore_record_size;
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}
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while (ptr < ptr_end) {
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size = pstore_get_buffer(PERSISTENT_RAM_SIG, ptr,
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pstore_record_size, buffer);
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ptr += pstore_record_size;
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if (size == 0)
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continue;
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header_len = pstore_read_kmsg_hdr(buffer, &compressed);
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if (header_len == 0) {
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log_debug("no valid kernel header\n");
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continue;
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}
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if (compressed) {
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printf("Compressed buffer, display not available\n");
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continue;
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}
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pstore_print_buffer("Dump", buffer + header_len,
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size - header_len);
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}
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}
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if (type == PSTORE_TYPE_CONSOLE || type == PSTORE_TYPE_ALL) {
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ptr = pstore_addr + pstore_length - pstore_pmsg_size
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- pstore_ftrace_size - pstore_console_size;
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size = pstore_get_buffer(PERSISTENT_RAM_SIG, ptr,
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pstore_console_size, buffer);
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if (size != 0)
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pstore_print_buffer("Console", buffer, size);
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}
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if (type == PSTORE_TYPE_FTRACE || type == PSTORE_TYPE_ALL) {
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ptr = pstore_addr + pstore_length - pstore_pmsg_size
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- pstore_ftrace_size;
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/* The FTrace record(s) uses LINUX_VERSION_CODE ^ 'DBGC'
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* signature, pass 0 to pstore_get_buffer to prevent
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* checking it
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*/
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size = pstore_get_buffer(0, ptr, pstore_ftrace_size, buffer);
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if (size != 0)
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pstore_print_buffer("FTrace", buffer, size);
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}
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if (type == PSTORE_TYPE_PMSG || type == PSTORE_TYPE_ALL) {
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ptr = pstore_addr + pstore_length - pstore_pmsg_size;
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size = pstore_get_buffer(PERSISTENT_RAM_SIG, ptr,
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pstore_pmsg_size, buffer);
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if (size != 0)
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pstore_print_buffer("User", buffer, size);
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}
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free(buffer);
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return 0;
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}
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/**
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* pstore_save() - Save existing records from pstore reserved memory
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* @cmdtp: Command data struct pointer
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* @flag: Command flag
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* @argc: Command-line argument count
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* @argv: Array of command-line arguments
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*
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* the records are saved under 'directory path', which should already exist,
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* to partition 'part' on device type 'interface' instance 'dev'
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* Filenames are automatically generated, depending on record type, like in
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* /sys/fs/pstore under Linux
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*
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* Return: zero on success, CMD_RET_USAGE in case of misuse and negative
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* on error.
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*/
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static int pstore_save(struct cmd_tbl *cmdtp, int flag, int argc,
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char * const argv[])
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{
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phys_addr_t ptr, ptr_end;
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char *buffer;
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char *save_argv[6];
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char addr[19], length[19];
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char path[256];
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u32 size;
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unsigned int index;
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int header_len = 0;
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bool compressed;
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if (argc < 4)
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return CMD_RET_USAGE;
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if (pstore_length == 0) {
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printf("Please set PStore configuration\n");
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return CMD_RET_USAGE;
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}
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if (buffer_size == 0)
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pstore_init_buffer_size();
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buffer = malloc_cache_aligned(buffer_size);
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sprintf(addr, "0x%p", buffer);
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save_argv[0] = argv[0];
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save_argv[1] = argv[1];
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save_argv[2] = argv[2];
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save_argv[3] = addr;
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save_argv[4] = path;
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save_argv[5] = length;
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/* Save all Dump records */
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ptr = pstore_addr;
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ptr_end = ptr + pstore_length - pstore_pmsg_size - pstore_ftrace_size
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- pstore_console_size;
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index = 0;
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while (ptr < ptr_end) {
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size = pstore_get_buffer(PERSISTENT_RAM_SIG, ptr,
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pstore_record_size, buffer);
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ptr += pstore_record_size;
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if (size == 0)
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continue;
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header_len = pstore_read_kmsg_hdr(buffer, &compressed);
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if (header_len == 0) {
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log_debug("no valid kernel header\n");
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continue;
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}
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sprintf(addr, "0x%08lx", (ulong)map_to_sysmem(buffer + header_len));
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sprintf(length, "0x%X", size - header_len);
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sprintf(path, "%s/dmesg-ramoops-%u%s", argv[3], index,
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compressed ? ".enc.z" : "");
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do_save(cmdtp, flag, 6, save_argv, FS_TYPE_ANY);
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index++;
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}
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sprintf(addr, "0x%08lx", (ulong)map_to_sysmem(buffer));
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/* Save Console record */
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size = pstore_get_buffer(PERSISTENT_RAM_SIG, ptr, pstore_console_size,
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buffer);
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if (size != 0) {
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sprintf(length, "0x%X", size);
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sprintf(path, "%s/console-ramoops-0", argv[3]);
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do_save(cmdtp, flag, 6, save_argv, FS_TYPE_ANY);
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}
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ptr += pstore_console_size;
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/* Save FTrace record(s)
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* The FTrace record(s) uses LINUX_VERSION_CODE ^ 'DBGC' signature,
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* pass 0 to pstore_get_buffer to prevent checking it
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*/
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size = pstore_get_buffer(0, ptr, pstore_ftrace_size, buffer);
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if (size != 0) {
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sprintf(length, "0x%X", size);
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sprintf(path, "%s/ftrace-ramoops-0", argv[3]);
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do_save(cmdtp, flag, 6, save_argv, FS_TYPE_ANY);
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}
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ptr += pstore_ftrace_size;
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/* Save Console record */
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size = pstore_get_buffer(PERSISTENT_RAM_SIG, ptr, pstore_pmsg_size,
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buffer);
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if (size != 0) {
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sprintf(length, "0x%X", size);
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sprintf(path, "%s/pmsg-ramoops-0", argv[3]);
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do_save(cmdtp, flag, 6, save_argv, FS_TYPE_ANY);
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}
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free(buffer);
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return 0;
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}
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static struct cmd_tbl cmd_pstore_sub[] = {
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U_BOOT_CMD_MKENT(set, 8, 0, pstore_set, "", ""),
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U_BOOT_CMD_MKENT(display, 3, 0, pstore_display, "", ""),
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U_BOOT_CMD_MKENT(save, 4, 0, pstore_save, "", ""),
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};
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static int do_pstore(struct cmd_tbl *cmdtp, int flag, int argc, char * const argv[])
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{
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struct cmd_tbl *c;
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if (argc < 2)
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return CMD_RET_USAGE;
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/* Strip off leading argument */
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argc--;
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argv++;
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c = find_cmd_tbl(argv[0], cmd_pstore_sub, ARRAY_SIZE(cmd_pstore_sub));
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if (!c)
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return CMD_RET_USAGE;
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return c->cmd(cmdtp, flag, argc, argv);
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}
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void fdt_fixup_pstore(void *blob)
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{
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char node[32];
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int nodeoffset; /* node offset from libfdt */
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nodeoffset = fdt_path_offset(blob, "/");
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if (nodeoffset < 0) {
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/* Not found or something else bad happened. */
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log_err("fdt_path_offset() returned %s\n", fdt_strerror(nodeoffset));
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return;
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|
}
|
|
|
|
nodeoffset = fdt_add_subnode(blob, nodeoffset, "reserved-memory");
|
|
if (nodeoffset < 0) {
|
|
log_err("Add 'reserved-memory' node failed: %s\n",
|
|
fdt_strerror(nodeoffset));
|
|
return;
|
|
}
|
|
fdt_setprop_u32(blob, nodeoffset, "#address-cells", 2);
|
|
fdt_setprop_u32(blob, nodeoffset, "#size-cells", 2);
|
|
fdt_setprop_empty(blob, nodeoffset, "ranges");
|
|
|
|
sprintf(node, "ramoops@%llx", (unsigned long long)pstore_addr);
|
|
nodeoffset = fdt_add_subnode(blob, nodeoffset, node);
|
|
if (nodeoffset < 0) {
|
|
log_err("Add '%s' node failed: %s\n", node, fdt_strerror(nodeoffset));
|
|
return;
|
|
}
|
|
fdt_setprop_string(blob, nodeoffset, "compatible", "ramoops");
|
|
fdt_setprop_u64(blob, nodeoffset, "reg", pstore_addr);
|
|
fdt_appendprop_u64(blob, nodeoffset, "reg", pstore_length);
|
|
fdt_setprop_u32(blob, nodeoffset, "record-size", pstore_record_size);
|
|
fdt_setprop_u32(blob, nodeoffset, "console-size", pstore_console_size);
|
|
fdt_setprop_u32(blob, nodeoffset, "ftrace-size", pstore_ftrace_size);
|
|
fdt_setprop_u32(blob, nodeoffset, "pmsg-size", pstore_pmsg_size);
|
|
fdt_setprop_u32(blob, nodeoffset, "ecc-size", pstore_ecc_size);
|
|
}
|
|
|
|
U_BOOT_CMD(pstore, 10, 0, do_pstore,
|
|
"Manage Linux Persistent Storage",
|
|
"set <addr> <len> [record-size] [console-size] [ftrace-size] [pmsg_size] [ecc-size]\n"
|
|
"- Set pstore reserved memory info, starting at 'addr' for 'len' bytes.\n"
|
|
" Default length for records is 4K.\n"
|
|
" 'record-size' is the size of one panic or oops record ('dump' type).\n"
|
|
" 'console-size' is the size of the kernel logs record.\n"
|
|
" 'ftrace-size' is the size of the ftrace record(s), this can be a single\n"
|
|
" record or divided in parts based on number of CPUs.\n"
|
|
" 'pmsg-size' is the size of the user space logs record.\n"
|
|
" 'ecc-size' enables/disables ECC support and specifies ECC buffer size in\n"
|
|
" bytes (0 disables it, 1 is a special value, means 16 bytes ECC).\n"
|
|
"pstore display [record-type] [nb]\n"
|
|
"- Display existing records in pstore reserved memory. A 'record-type' can\n"
|
|
" be given to only display records of this kind. 'record-type' can be one\n"
|
|
" of 'dump', 'console', 'ftrace' or 'user'. For 'dump' and 'ftrace' types,\n"
|
|
" a 'nb' can be given to only display one record.\n"
|
|
"pstore save <interface> <dev[:part]> <directory-path>\n"
|
|
"- Save existing records in pstore reserved memory under 'directory path'\n"
|
|
" to partition 'part' on device type 'interface' instance 'dev'.\n"
|
|
" Filenames are automatically generated, depending on record type, like\n"
|
|
" in /sys/fs/pstore under Linux.\n"
|
|
" The 'directory-path' should already exist.\n"
|
|
);
|