1509 lines
42 KiB
C
1509 lines
42 KiB
C
/* Copyright (c) 2013-2015, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/export.h>
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#include <linux/err.h>
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#include <linux/init.h>
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#include <linux/ipc_logging.h>
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#include <linux/kernel.h>
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#include <linux/moduleparam.h>
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#include <linux/notifier.h>
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#include <linux/of.h>
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#include <linux/of_platform.h>
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#include <linux/platform_device.h>
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#include <linux/printk.h>
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#include <linux/slab.h>
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#include <linux/stat.h>
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#include <soc/qcom/subsystem_notif.h>
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#include <soc/qcom/subsystem_restart.h>
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#include <soc/qcom/ramdump.h>
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#include <soc/qcom/smem.h>
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#include "smem_private.h"
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#define MODEM_SBL_VERSION_INDEX 7
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#define SMEM_VERSION_INFO_SIZE (32 * 4)
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#define SMEM_VERSION 0x000B
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enum {
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MSM_SMEM_DEBUG = 1U << 0,
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MSM_SMEM_INFO = 1U << 1,
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};
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static int msm_smem_debug_mask = MSM_SMEM_INFO;
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module_param_named(debug_mask, msm_smem_debug_mask,
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int, S_IRUGO | S_IWUSR | S_IWGRP);
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static void *smem_ipc_log_ctx;
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#define NUM_LOG_PAGES 4
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#define IPC_LOG(x...) do { \
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if (smem_ipc_log_ctx) \
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ipc_log_string(smem_ipc_log_ctx, x); \
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} while (0)
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#define LOG_ERR(x...) do { \
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pr_err(x); \
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IPC_LOG(x); \
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} while (0)
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#define SMEM_DBG(x...) do { \
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if (msm_smem_debug_mask & MSM_SMEM_DEBUG) \
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IPC_LOG(x); \
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} while (0)
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#define SMEM_INFO(x...) do { \
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if (msm_smem_debug_mask & MSM_SMEM_INFO) \
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IPC_LOG(x); \
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} while (0)
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#define SMEM_SPINLOCK_SMEM_ALLOC "S:3"
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static void *smem_ram_base;
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static resource_size_t smem_ram_size;
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static phys_addr_t smem_ram_phys;
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static remote_spinlock_t remote_spinlock;
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static uint32_t num_smem_areas;
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static struct smem_area *smem_areas;
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static struct ramdump_segment *smem_ramdump_segments;
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static int spinlocks_initialized;
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static void *smem_ramdump_dev;
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static DEFINE_MUTEX(spinlock_init_lock);
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static DEFINE_SPINLOCK(smem_init_check_lock);
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static int smem_module_inited;
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static RAW_NOTIFIER_HEAD(smem_module_init_notifier_list);
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static DEFINE_MUTEX(smem_module_init_notifier_lock);
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static bool probe_done;
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/* smem security feature components */
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#define SMEM_TOC_IDENTIFIER 0x434f5424 /* "$TOC" */
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#define SMEM_TOC_MAX_EXCLUSIONS 4
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#define SMEM_PART_HDR_IDENTIFIER 0x54525024 /* "$PRT" */
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#define SMEM_ALLOCATION_CANARY 0xa5a5
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struct smem_toc_entry {
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uint32_t offset;
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uint32_t size;
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uint32_t flags;
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uint16_t host0;
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uint16_t host1;
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uint32_t size_cacheline;
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uint32_t reserved[3];
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uint32_t exclusion_sizes[SMEM_TOC_MAX_EXCLUSIONS];
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};
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struct smem_toc {
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/* Identifier is a constant, set to SMEM_TOC_IDENTIFIER. */
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uint32_t identifier;
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uint32_t version;
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uint32_t num_entries;
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uint32_t reserved[5];
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struct smem_toc_entry entry[];
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};
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struct smem_partition_header {
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/* Identifier is a constant, set to SMEM_PART_HDR_IDENTIFIER. */
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uint32_t identifier;
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uint16_t host0;
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uint16_t host1;
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uint32_t size;
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uint32_t offset_free_uncached;
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uint32_t offset_free_cached;
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uint32_t reserved[3];
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};
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struct smem_partition_allocation_header {
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/* Canary is a constant, set to SMEM_ALLOCATION_CANARY */
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uint16_t canary;
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uint16_t smem_type;
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uint32_t size; /* includes padding bytes */
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uint16_t padding_data;
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uint16_t padding_hdr;
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uint32_t reserved[1];
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};
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struct smem_partition_info {
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uint32_t partition_num;
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uint32_t offset;
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uint32_t size_cacheline;
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};
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static struct smem_partition_info partitions[NUM_SMEM_SUBSYSTEMS];
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/* end smem security feature components */
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/* Identifier for the SMEM target info struct. */
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#define SMEM_TARG_INFO_IDENTIFIER 0x49494953 /* "SIII" in little-endian. */
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struct smem_targ_info_type {
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/* Identifier is a constant, set to SMEM_TARG_INFO_IDENTIFIER. */
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uint32_t identifier;
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uint32_t size;
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phys_addr_t phys_base_addr;
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};
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struct restart_notifier_block {
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unsigned processor;
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char *name;
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struct notifier_block nb;
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};
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static int restart_notifier_cb(struct notifier_block *this,
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unsigned long code,
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void *data);
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static struct restart_notifier_block restart_notifiers[] = {
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{SMEM_MODEM, "modem", .nb.notifier_call = restart_notifier_cb},
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{SMEM_Q6, "lpass", .nb.notifier_call = restart_notifier_cb},
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{SMEM_WCNSS, "wcnss", .nb.notifier_call = restart_notifier_cb},
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{SMEM_DSPS, "dsps", .nb.notifier_call = restart_notifier_cb},
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{SMEM_MODEM, "gss", .nb.notifier_call = restart_notifier_cb},
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{SMEM_Q6, "adsp", .nb.notifier_call = restart_notifier_cb},
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{SMEM_DSPS, "slpi", .nb.notifier_call = restart_notifier_cb},
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};
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static int init_smem_remote_spinlock(void);
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/**
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* is_probe_done() - Did the probe function successfully complete
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*
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* @return - true if probe successfully completed, false if otherwise
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*
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* Helper function for EPROBE_DEFER support. If this function returns false,
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* the calling function should immediately return -EPROBE_DEFER.
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*/
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static bool is_probe_done(void)
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{
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return probe_done;
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}
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/**
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* smem_phys_to_virt() - Convert a physical base and offset to virtual address
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*
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* @base: physical base address to check
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* @offset: offset from the base to get the final address
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* @returns: virtual SMEM address; NULL for failure
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*
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* Takes a physical address and an offset and checks if the resulting physical
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* address would fit into one of the smem regions. If so, returns the
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* corresponding virtual address. Otherwise returns NULL.
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*/
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static void *smem_phys_to_virt(phys_addr_t base, unsigned offset)
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{
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int i;
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phys_addr_t phys_addr;
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resource_size_t size;
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if (OVERFLOW_ADD_UNSIGNED(phys_addr_t, base, offset))
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return NULL;
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if (!smem_areas) {
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/*
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* Early boot - no area configuration yet, so default
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* to using the main memory region.
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*
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* To remove the MSM_SHARED_RAM_BASE and the static
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* mapping of SMEM in the future, add dump_stack()
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* to identify the early callers of smem_get_entry()
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* (which calls this function) and replace those calls
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* with a new function that knows how to lookup the
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* SMEM base address before SMEM has been probed.
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*/
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phys_addr = smem_ram_phys;
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size = smem_ram_size;
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if (base >= phys_addr && base + offset < phys_addr + size) {
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if (OVERFLOW_ADD_UNSIGNED(uintptr_t,
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(uintptr_t)smem_ram_base, offset)) {
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SMEM_INFO("%s: overflow %p %x\n", __func__,
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smem_ram_base, offset);
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return NULL;
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}
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return smem_ram_base + offset;
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} else {
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return NULL;
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}
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}
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for (i = 0; i < num_smem_areas; ++i) {
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phys_addr = smem_areas[i].phys_addr;
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size = smem_areas[i].size;
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if (base < phys_addr || base + offset >= phys_addr + size)
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continue;
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if (OVERFLOW_ADD_UNSIGNED(uintptr_t,
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(uintptr_t)smem_areas[i].virt_addr, offset)) {
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SMEM_INFO("%s: overflow %p %x\n", __func__,
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smem_areas[i].virt_addr, offset);
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return NULL;
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}
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return smem_areas[i].virt_addr + offset;
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}
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return NULL;
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}
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/**
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* smem_virt_to_phys() - Convert SMEM address to physical address.
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*
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* @smem_address: Address of SMEM item (returned by smem_alloc(), etc)
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* @returns: Physical address (or NULL if there is a failure)
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*
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* This function should only be used if an SMEM item needs to be handed
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* off to a DMA engine. This function will not return a version of EPROBE_DEFER
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* if the driver is not ready since the caller should obtain @smem_address from
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* one of the other public APIs and get EPROBE_DEFER at that time, if
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* applicable.
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*/
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phys_addr_t smem_virt_to_phys(void *smem_address)
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{
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phys_addr_t phys_addr = 0;
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int i;
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void *vend;
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if (!smem_areas)
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return phys_addr;
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for (i = 0; i < num_smem_areas; ++i) {
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vend = (void *)(smem_areas[i].virt_addr + smem_areas[i].size);
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if (smem_address >= smem_areas[i].virt_addr &&
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smem_address < vend) {
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phys_addr = smem_address - smem_areas[i].virt_addr;
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phys_addr += smem_areas[i].phys_addr;
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break;
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}
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}
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return phys_addr;
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}
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EXPORT_SYMBOL(smem_virt_to_phys);
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/**
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* __smem_get_entry_nonsecure - Get pointer and size of existing SMEM item
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*
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* @id: ID of SMEM item
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* @size: Pointer to size variable for storing the result
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* @skip_init_check: True means do not verify that SMEM has been initialized
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* @use_rspinlock: True to use the remote spinlock
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* @returns: Pointer to SMEM item or NULL if it doesn't exist
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*/
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static void *__smem_get_entry_nonsecure(unsigned id, unsigned *size,
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bool skip_init_check, bool use_rspinlock)
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{
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struct smem_shared *shared = smem_ram_base;
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struct smem_heap_entry *toc = shared->heap_toc;
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int use_spinlocks = spinlocks_initialized && use_rspinlock;
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void *ret = 0;
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unsigned long flags = 0;
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int rc;
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if (!skip_init_check && !smem_initialized_check())
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return ret;
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if (id >= SMEM_NUM_ITEMS)
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return ret;
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if (use_spinlocks) {
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do {
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rc = remote_spin_trylock_irqsave(&remote_spinlock,
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flags);
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} while (!rc);
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}
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/* toc is in device memory and cannot be speculatively accessed */
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if (toc[id].allocated) {
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phys_addr_t phys_base;
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*size = toc[id].size;
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barrier();
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phys_base = toc[id].reserved & BASE_ADDR_MASK;
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if (!phys_base)
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phys_base = smem_ram_phys;
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ret = smem_phys_to_virt(phys_base, toc[id].offset);
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} else {
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*size = 0;
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}
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if (use_spinlocks)
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remote_spin_unlock_irqrestore(&remote_spinlock, flags);
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return ret;
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}
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/**
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* __smem_get_entry_secure - Get pointer and size of existing SMEM item with
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* security support
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*
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* @id: ID of SMEM item
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* @size: Pointer to size variable for storing the result
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* @to_proc: SMEM host that shares the item with apps
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* @flags: Item attribute flags
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* @skip_init_check: True means do not verify that SMEM has been initialized
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* @use_rspinlock: True to use the remote spinlock
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* @returns: Pointer to SMEM item or NULL if it doesn't exist
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*/
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static void *__smem_get_entry_secure(unsigned id,
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unsigned *size,
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unsigned to_proc,
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unsigned flags,
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bool skip_init_check,
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bool use_rspinlock)
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{
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struct smem_partition_header *hdr;
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unsigned long lflags = 0;
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void *item = NULL;
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struct smem_partition_allocation_header *alloc_hdr;
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uint32_t partition_num;
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uint32_t a_hdr_size;
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int rc;
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SMEM_DBG("%s(%u, %u, %u, %u, %d, %d)\n", __func__, id, *size, to_proc,
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flags, skip_init_check, use_rspinlock);
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if (!skip_init_check && !smem_initialized_check())
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return NULL;
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if (id >= SMEM_NUM_ITEMS) {
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SMEM_INFO("%s: invalid id %d\n", __func__, id);
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return NULL;
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}
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if (!(flags & SMEM_ANY_HOST_FLAG) && to_proc >= NUM_SMEM_SUBSYSTEMS) {
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SMEM_INFO("%s: id %u invalid to_proc %d\n", __func__, id,
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to_proc);
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return NULL;
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}
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if (flags & SMEM_ANY_HOST_FLAG || !partitions[to_proc].offset)
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return __smem_get_entry_nonsecure(id, size, skip_init_check,
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use_rspinlock);
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partition_num = partitions[to_proc].partition_num;
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hdr = smem_areas[0].virt_addr + partitions[to_proc].offset;
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if (unlikely(!spinlocks_initialized)) {
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rc = init_smem_remote_spinlock();
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if (unlikely(rc)) {
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SMEM_INFO(
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"%s: id:%u remote spinlock init failed %d\n",
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__func__, id, rc);
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return NULL;
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}
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}
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if (use_rspinlock) {
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do {
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rc = remote_spin_trylock_irqsave(&remote_spinlock,
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lflags);
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} while (!rc);
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}
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if (hdr->identifier != SMEM_PART_HDR_IDENTIFIER) {
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LOG_ERR(
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"%s: SMEM corruption detected. Partition %d to %d at %p\n",
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__func__,
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partition_num,
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to_proc,
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hdr);
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BUG();
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}
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if (flags & SMEM_ITEM_CACHED_FLAG) {
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a_hdr_size = ALIGN(sizeof(*alloc_hdr),
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partitions[to_proc].size_cacheline);
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for (alloc_hdr = (void *)(hdr) + hdr->size - a_hdr_size;
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(void *)(alloc_hdr) > (void *)(hdr) +
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hdr->offset_free_cached;
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alloc_hdr = (void *)(alloc_hdr) -
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alloc_hdr->size - a_hdr_size) {
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if (alloc_hdr->canary != SMEM_ALLOCATION_CANARY) {
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LOG_ERR(
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"%s: SMEM corruption detected. Partition %d to %d at %p\n",
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__func__,
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partition_num,
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to_proc,
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alloc_hdr);
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BUG();
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}
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if (alloc_hdr->smem_type == id) {
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/* 8 byte alignment to match legacy */
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*size = ALIGN(alloc_hdr->size -
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alloc_hdr->padding_data, 8);
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item = (void *)(alloc_hdr) - alloc_hdr->size;
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break;
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}
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}
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} else {
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for (alloc_hdr = (void *)(hdr) + sizeof(*hdr);
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(void *)(alloc_hdr) < (void *)(hdr) +
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hdr->offset_free_uncached;
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alloc_hdr = (void *)(alloc_hdr) +
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sizeof(*alloc_hdr) +
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alloc_hdr->padding_hdr +
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alloc_hdr->size) {
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if (alloc_hdr->canary != SMEM_ALLOCATION_CANARY) {
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LOG_ERR(
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"%s: SMEM corruption detected. Partition %d to %d at %p\n",
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__func__,
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partition_num,
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to_proc,
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alloc_hdr);
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BUG();
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}
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if (alloc_hdr->smem_type == id) {
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/* 8 byte alignment to match legacy */
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*size = ALIGN(alloc_hdr->size -
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alloc_hdr->padding_data, 8);
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item = (void *)(alloc_hdr) +
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sizeof(*alloc_hdr) +
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alloc_hdr->padding_hdr;
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break;
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}
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}
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}
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if (use_rspinlock)
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remote_spin_unlock_irqrestore(&remote_spinlock, lflags);
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return item;
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}
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static void *__smem_find(unsigned id, unsigned size_in, bool skip_init_check)
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{
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unsigned size;
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void *ptr;
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ptr = __smem_get_entry_nonsecure(id, &size, skip_init_check, true);
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if (!ptr)
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return 0;
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size_in = ALIGN(size_in, 8);
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if (size_in != size) {
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SMEM_INFO("smem_find(%u, %u): wrong size %u\n",
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id, size_in, size);
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return 0;
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}
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return ptr;
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}
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/**
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|
* smem_find - Find existing item with security support
|
|
*
|
|
* @id: ID of SMEM item
|
|
* @size_in: Size of the SMEM item
|
|
* @to_proc: SMEM host that shares the item with apps
|
|
* @flags: Item attribute flags
|
|
* @returns: Pointer to SMEM item, NULL if it doesn't exist, or -EPROBE_DEFER
|
|
* if the driver is not ready
|
|
*/
|
|
void *smem_find(unsigned id, unsigned size_in, unsigned to_proc, unsigned flags)
|
|
{
|
|
unsigned size;
|
|
void *ptr;
|
|
|
|
SMEM_DBG("%s(%u, %u, %u, %u)\n", __func__, id, size_in, to_proc,
|
|
flags);
|
|
|
|
/*
|
|
* Handle the circular dependecy between SMEM and software implemented
|
|
* remote spinlocks. SMEM must initialize the remote spinlocks in
|
|
* probe() before it is done. EPROBE_DEFER handling will not resolve
|
|
* this code path, so we must be intellegent to know that the spinlock
|
|
* item is a special case.
|
|
*/
|
|
if (!is_probe_done() && id != SMEM_SPINLOCK_ARRAY)
|
|
return ERR_PTR(-EPROBE_DEFER);
|
|
|
|
ptr = smem_get_entry(id, &size, to_proc, flags);
|
|
if (!ptr)
|
|
return 0;
|
|
|
|
size_in = ALIGN(size_in, 8);
|
|
if (size_in != size) {
|
|
SMEM_INFO("smem_find(%u, %u, %u, %u): wrong size %u\n",
|
|
id, size_in, to_proc, flags, size);
|
|
return 0;
|
|
}
|
|
|
|
return ptr;
|
|
}
|
|
EXPORT_SYMBOL(smem_find);
|
|
|
|
/**
|
|
* alloc_item_nonsecure - Allocate an SMEM item in the nonsecure partition
|
|
*
|
|
* @id: ID of SMEM item
|
|
* @size_in: Size to allocate
|
|
* @returns: Pointer to SMEM item or NULL for error
|
|
*
|
|
* Assumes the id parameter is valid and does not already exist. Assumes
|
|
* size_in is already adjusted for alignment, if necessary. Requires the
|
|
* remote spinlock to already be locked.
|
|
*/
|
|
static void *alloc_item_nonsecure(unsigned id, unsigned size_in)
|
|
{
|
|
void *smem_base = smem_ram_base;
|
|
struct smem_shared *shared = smem_base;
|
|
struct smem_heap_entry *toc = shared->heap_toc;
|
|
void *ret = NULL;
|
|
|
|
if (shared->heap_info.heap_remaining >= size_in) {
|
|
toc[id].offset = shared->heap_info.free_offset;
|
|
toc[id].size = size_in;
|
|
/*
|
|
* wmb() is necessary to ensure the allocation data is
|
|
* consistent before setting the allocated flag to prevent race
|
|
* conditions with remote processors
|
|
*/
|
|
wmb();
|
|
toc[id].allocated = 1;
|
|
|
|
shared->heap_info.free_offset += size_in;
|
|
shared->heap_info.heap_remaining -= size_in;
|
|
ret = smem_base + toc[id].offset;
|
|
/*
|
|
* wmb() is necessary to ensure the heap data is consistent
|
|
* before continuing to prevent race conditions with remote
|
|
* processors
|
|
*/
|
|
wmb();
|
|
} else {
|
|
SMEM_INFO("%s: id %u not enough memory %u (required %u)\n",
|
|
__func__, id, shared->heap_info.heap_remaining,
|
|
size_in);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* alloc_item_secure - Allocate an SMEM item in a secure partition
|
|
*
|
|
* @id: ID of SMEM item
|
|
* @size_in: Size to allocate
|
|
* @to_proc: SMEM host that shares the item with apps
|
|
* @flags: Item attribute flags
|
|
* @returns: Pointer to SMEM item or NULL for error
|
|
*
|
|
* Assumes the id parameter is valid and does not already exist. Assumes
|
|
* size_in is the raw size requested by the client. Assumes to_proc is a valid
|
|
* host, and a valid partition to that host exists. Requires the remote
|
|
* spinlock to already be locked.
|
|
*/
|
|
static void *alloc_item_secure(unsigned id, unsigned size_in, unsigned to_proc,
|
|
unsigned flags)
|
|
{
|
|
void *smem_base = smem_ram_base;
|
|
struct smem_partition_header *hdr;
|
|
struct smem_partition_allocation_header *alloc_hdr;
|
|
uint32_t a_hdr_size;
|
|
uint32_t a_data_size;
|
|
uint32_t size_cacheline;
|
|
uint32_t free_space;
|
|
uint32_t partition_num;
|
|
void *ret = NULL;
|
|
|
|
hdr = smem_base + partitions[to_proc].offset;
|
|
partition_num = partitions[to_proc].partition_num;
|
|
|
|
if (hdr->identifier != SMEM_PART_HDR_IDENTIFIER) {
|
|
LOG_ERR(
|
|
"%s: SMEM corruption detected. Partition %d to %d at %p\n",
|
|
__func__,
|
|
partition_num,
|
|
to_proc,
|
|
hdr);
|
|
BUG();
|
|
}
|
|
|
|
size_cacheline = partitions[to_proc].size_cacheline;
|
|
free_space = hdr->offset_free_cached -
|
|
hdr->offset_free_uncached;
|
|
|
|
if (flags & SMEM_ITEM_CACHED_FLAG) {
|
|
a_hdr_size = ALIGN(sizeof(*alloc_hdr), size_cacheline);
|
|
a_data_size = ALIGN(size_in, size_cacheline);
|
|
if (free_space < a_hdr_size + a_data_size) {
|
|
SMEM_INFO(
|
|
"%s: id %u not enough memory %u (required %u)\n",
|
|
__func__, id, free_space,
|
|
a_hdr_size + a_data_size);
|
|
return ret;
|
|
}
|
|
alloc_hdr = (void *)(hdr) + hdr->offset_free_cached -
|
|
a_hdr_size;
|
|
alloc_hdr->canary = SMEM_ALLOCATION_CANARY;
|
|
alloc_hdr->smem_type = id;
|
|
alloc_hdr->size = a_data_size;
|
|
alloc_hdr->padding_data = a_data_size - size_in;
|
|
alloc_hdr->padding_hdr = a_hdr_size - sizeof(*alloc_hdr);
|
|
hdr->offset_free_cached = hdr->offset_free_cached -
|
|
a_hdr_size - a_data_size;
|
|
ret = (void *)(alloc_hdr) - a_data_size;
|
|
/*
|
|
* The SMEM protocol currently does not support cacheable
|
|
* areas within the smem region, but if it ever does in the
|
|
* future, then cache management needs to be done here.
|
|
* The area of memory this item is allocated from will need to
|
|
* be dynamically made cachable, and a cache flush of the
|
|
* allocation header using __cpuc_flush_dcache_area and
|
|
* outer_flush_area will need to be done.
|
|
*/
|
|
} else {
|
|
a_hdr_size = sizeof(*alloc_hdr);
|
|
a_data_size = ALIGN(size_in, 8);
|
|
if (free_space < a_hdr_size + a_data_size) {
|
|
SMEM_INFO(
|
|
"%s: id %u not enough memory %u (required %u)\n",
|
|
__func__, id, free_space,
|
|
a_hdr_size + a_data_size);
|
|
return ret;
|
|
}
|
|
alloc_hdr = (void *)(hdr) + hdr->offset_free_uncached;
|
|
alloc_hdr->canary = SMEM_ALLOCATION_CANARY;
|
|
alloc_hdr->smem_type = id;
|
|
alloc_hdr->size = a_data_size;
|
|
alloc_hdr->padding_data = a_data_size - size_in;
|
|
alloc_hdr->padding_hdr = a_hdr_size - sizeof(*alloc_hdr);
|
|
hdr->offset_free_uncached = hdr->offset_free_uncached +
|
|
a_hdr_size + a_data_size;
|
|
ret = alloc_hdr + 1;
|
|
}
|
|
/*
|
|
* wmb() is necessary to ensure the heap and allocation data is
|
|
* consistent before continuing to prevent race conditions with remote
|
|
* processors
|
|
*/
|
|
wmb();
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* smem_alloc - Find an existing item, otherwise allocate it with security
|
|
* support
|
|
*
|
|
* @id: ID of SMEM item
|
|
* @size_in: Size of the SMEM item
|
|
* @to_proc: SMEM host that shares the item with apps
|
|
* @flags: Item attribute flags
|
|
* @returns: Pointer to SMEM item, NULL if it couldn't be found/allocated,
|
|
* or -EPROBE_DEFER if the driver is not ready
|
|
*/
|
|
void *smem_alloc(unsigned id, unsigned size_in, unsigned to_proc,
|
|
unsigned flags)
|
|
{
|
|
unsigned long lflags;
|
|
void *ret = NULL;
|
|
int rc;
|
|
unsigned size_out;
|
|
unsigned a_size_in;
|
|
|
|
SMEM_DBG("%s(%u, %u, %u, %u)\n", __func__, id, size_in, to_proc,
|
|
flags);
|
|
|
|
if (!is_probe_done())
|
|
return ERR_PTR(-EPROBE_DEFER);
|
|
|
|
if (!smem_initialized_check())
|
|
return NULL;
|
|
|
|
if (id >= SMEM_NUM_ITEMS) {
|
|
SMEM_INFO("%s: invalid id %u\n", __func__, id);
|
|
return NULL;
|
|
}
|
|
|
|
if (!(flags & SMEM_ANY_HOST_FLAG) && to_proc >= NUM_SMEM_SUBSYSTEMS) {
|
|
SMEM_INFO("%s: invalid to_proc %u for id %u\n", __func__,
|
|
to_proc, id);
|
|
return NULL;
|
|
}
|
|
|
|
if (unlikely(!spinlocks_initialized)) {
|
|
rc = init_smem_remote_spinlock();
|
|
if (unlikely(rc)) {
|
|
SMEM_INFO("%s: id:%u remote spinlock init failed %d\n",
|
|
__func__, id, rc);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
a_size_in = ALIGN(size_in, 8);
|
|
do {
|
|
rc = remote_spin_trylock_irqsave(&remote_spinlock, lflags);
|
|
} while (!rc);
|
|
|
|
ret = __smem_get_entry_secure(id, &size_out, to_proc, flags, true,
|
|
false);
|
|
if (ret) {
|
|
SMEM_INFO("%s: %u already allocated\n", __func__, id);
|
|
if (a_size_in == size_out) {
|
|
remote_spin_unlock_irqrestore(&remote_spinlock, lflags);
|
|
return ret;
|
|
} else {
|
|
remote_spin_unlock_irqrestore(&remote_spinlock, lflags);
|
|
SMEM_INFO("%s: id %u wrong size %u (expected %u)\n",
|
|
__func__, id, size_out, a_size_in);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
if (id > SMEM_FIXED_ITEM_LAST) {
|
|
SMEM_INFO("%s: allocating %u size %u to_proc %u flags %u\n",
|
|
__func__, id, size_in, to_proc, flags);
|
|
if (flags & SMEM_ANY_HOST_FLAG || !partitions[to_proc].offset)
|
|
ret = alloc_item_nonsecure(id, a_size_in);
|
|
else
|
|
ret = alloc_item_secure(id, size_in, to_proc, flags);
|
|
|
|
} else {
|
|
SMEM_INFO("%s: attempted to allocate non-dynamic item %u\n",
|
|
__func__, id);
|
|
}
|
|
|
|
remote_spin_unlock_irqrestore(&remote_spinlock, lflags);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(smem_alloc);
|
|
|
|
/**
|
|
* smem_get_entry - Get existing item with security support
|
|
*
|
|
* @id: ID of SMEM item
|
|
* @size: Pointer to size variable for storing the result
|
|
* @to_proc: SMEM host that shares the item with apps
|
|
* @flags: Item attribute flags
|
|
* @returns: Pointer to SMEM item, NULL if it doesn't exist, or -EPROBE_DEFER
|
|
* if the driver isn't ready
|
|
*/
|
|
void *smem_get_entry(unsigned id, unsigned *size, unsigned to_proc,
|
|
unsigned flags)
|
|
{
|
|
SMEM_DBG("%s(%u, %u, %u, %u)\n", __func__, id, *size, to_proc, flags);
|
|
|
|
/*
|
|
* Handle the circular dependecy between SMEM and software implemented
|
|
* remote spinlocks. SMEM must initialize the remote spinlocks in
|
|
* probe() before it is done. EPROBE_DEFER handling will not resolve
|
|
* this code path, so we must be intellegent to know that the spinlock
|
|
* item is a special case.
|
|
*/
|
|
if (!is_probe_done() && id != SMEM_SPINLOCK_ARRAY)
|
|
return ERR_PTR(-EPROBE_DEFER);
|
|
|
|
return __smem_get_entry_secure(id, size, to_proc, flags, false, true);
|
|
}
|
|
EXPORT_SYMBOL(smem_get_entry);
|
|
|
|
/**
|
|
* smem_get_entry_no_rlock - Get existing item without using remote spinlock
|
|
*
|
|
* @id: ID of SMEM item
|
|
* @size_out: Pointer to size variable for storing the result
|
|
* @to_proc: SMEM host that shares the item with apps
|
|
* @flags: Item attribute flags
|
|
* @returns: Pointer to SMEM item, NULL if it doesn't exist, or -EPROBE_DEFER
|
|
* if the driver isn't ready
|
|
*
|
|
* This function does not lock the remote spinlock and should only be used in
|
|
* failure-recover cases such as retrieving the subsystem failure reason during
|
|
* subsystem restart.
|
|
*/
|
|
void *smem_get_entry_no_rlock(unsigned id, unsigned *size_out, unsigned to_proc,
|
|
unsigned flags)
|
|
{
|
|
if (!is_probe_done())
|
|
return ERR_PTR(-EPROBE_DEFER);
|
|
|
|
return __smem_get_entry_secure(id, size_out, to_proc, flags, false,
|
|
false);
|
|
}
|
|
EXPORT_SYMBOL(smem_get_entry_no_rlock);
|
|
|
|
/**
|
|
* smem_get_remote_spinlock - Remote spinlock pointer for unit testing.
|
|
*
|
|
* @returns: pointer to SMEM remote spinlock
|
|
*/
|
|
remote_spinlock_t *smem_get_remote_spinlock(void)
|
|
{
|
|
if (unlikely(!spinlocks_initialized))
|
|
init_smem_remote_spinlock();
|
|
return &remote_spinlock;
|
|
}
|
|
EXPORT_SYMBOL(smem_get_remote_spinlock);
|
|
|
|
/**
|
|
* smem_get_free_space() - Get the available allocation free space for a
|
|
* partition
|
|
*
|
|
* @to_proc: remote SMEM host. Determines the applicable partition
|
|
* @returns: size in bytes available to allocate
|
|
*
|
|
* Helper function for SMD so that SMD only scans the channel allocation
|
|
* table for a partition when it is reasonably certain that a channel has
|
|
* actually been created, because scanning can be expensive. Creating a channel
|
|
* will consume some of the free space in a partition, so SMD can compare the
|
|
* last free space size against the current free space size to determine if
|
|
* a channel may have been created. SMD can't do this directly, because the
|
|
* necessary partition internals are restricted to just SMEM.
|
|
*/
|
|
unsigned smem_get_free_space(unsigned to_proc)
|
|
{
|
|
struct smem_partition_header *hdr;
|
|
struct smem_shared *shared;
|
|
|
|
if (to_proc >= NUM_SMEM_SUBSYSTEMS) {
|
|
pr_err("%s: invalid to_proc:%d\n", __func__, to_proc);
|
|
return UINT_MAX;
|
|
}
|
|
|
|
if (partitions[to_proc].offset) {
|
|
if (unlikely(OVERFLOW_ADD_UNSIGNED(uintptr_t,
|
|
(uintptr_t)smem_areas[0].virt_addr,
|
|
partitions[to_proc].offset))) {
|
|
pr_err("%s: unexpected overflow detected\n", __func__);
|
|
return UINT_MAX;
|
|
}
|
|
hdr = smem_areas[0].virt_addr + partitions[to_proc].offset;
|
|
return hdr->offset_free_cached - hdr->offset_free_uncached;
|
|
} else {
|
|
shared = smem_ram_base;
|
|
return shared->heap_info.heap_remaining;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(smem_get_free_space);
|
|
|
|
/**
|
|
* smem_get_version() - Get the smem user version number
|
|
*
|
|
* @idx: SMEM user idx in SMEM_VERSION_INFO table.
|
|
* @returns: smem version number if success otherwise zero.
|
|
*/
|
|
unsigned smem_get_version(unsigned idx)
|
|
{
|
|
int *version_array;
|
|
|
|
if (idx > 32) {
|
|
pr_err("%s: invalid idx:%d\n", __func__, idx);
|
|
return 0;
|
|
}
|
|
|
|
version_array = __smem_find(SMEM_VERSION_INFO, SMEM_VERSION_INFO_SIZE,
|
|
true);
|
|
if (version_array == NULL)
|
|
return 0;
|
|
|
|
return version_array[idx];
|
|
}
|
|
EXPORT_SYMBOL(smem_get_version);
|
|
|
|
/**
|
|
* init_smem_remote_spinlock - Reentrant remote spinlock initialization
|
|
*
|
|
* @returns: success or error code for failure
|
|
*/
|
|
static int init_smem_remote_spinlock(void)
|
|
{
|
|
int rc = 0;
|
|
|
|
/*
|
|
* Optimistic locking. Init only needs to be done once by the first
|
|
* caller. After that, serializing inits between different callers
|
|
* is unnecessary. The second check after the lock ensures init
|
|
* wasn't previously completed by someone else before the lock could
|
|
* be grabbed.
|
|
*/
|
|
if (!spinlocks_initialized) {
|
|
mutex_lock(&spinlock_init_lock);
|
|
if (!spinlocks_initialized) {
|
|
rc = remote_spin_lock_init(&remote_spinlock,
|
|
SMEM_SPINLOCK_SMEM_ALLOC);
|
|
if (!rc)
|
|
spinlocks_initialized = 1;
|
|
}
|
|
mutex_unlock(&spinlock_init_lock);
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* smem_initialized_check - Reentrant check that smem has been initialized
|
|
*
|
|
* @returns: true if initialized, false if not.
|
|
*/
|
|
bool smem_initialized_check(void)
|
|
{
|
|
static int checked;
|
|
static int is_inited;
|
|
unsigned long flags;
|
|
struct smem_shared *smem;
|
|
|
|
if (likely(checked)) {
|
|
if (unlikely(!is_inited))
|
|
LOG_ERR("%s: smem not initialized\n", __func__);
|
|
return is_inited;
|
|
}
|
|
|
|
spin_lock_irqsave(&smem_init_check_lock, flags);
|
|
if (checked) {
|
|
spin_unlock_irqrestore(&smem_init_check_lock, flags);
|
|
if (unlikely(!is_inited))
|
|
LOG_ERR("%s: smem not initialized\n", __func__);
|
|
return is_inited;
|
|
}
|
|
|
|
smem = smem_ram_base;
|
|
|
|
if (smem->heap_info.initialized != 1)
|
|
goto failed;
|
|
if (smem->heap_info.reserved != 0)
|
|
goto failed;
|
|
|
|
/*
|
|
* The Modem SBL is now the Master SBL version and is required to
|
|
* pre-initialize SMEM and fill in any necessary configuration
|
|
* structures. Without the extra configuration data, the SMEM driver
|
|
* cannot be properly initialized.
|
|
*/
|
|
if (smem_get_version(MODEM_SBL_VERSION_INDEX) != SMEM_VERSION << 16) {
|
|
pr_err("%s: SBL version not correct\n", __func__);
|
|
goto failed;
|
|
}
|
|
|
|
is_inited = 1;
|
|
checked = 1;
|
|
spin_unlock_irqrestore(&smem_init_check_lock, flags);
|
|
return is_inited;
|
|
|
|
failed:
|
|
is_inited = 0;
|
|
checked = 1;
|
|
spin_unlock_irqrestore(&smem_init_check_lock, flags);
|
|
LOG_ERR(
|
|
"%s: shared memory needs to be initialized by SBL before booting\n",
|
|
__func__);
|
|
return is_inited;
|
|
}
|
|
EXPORT_SYMBOL(smem_initialized_check);
|
|
|
|
static int restart_notifier_cb(struct notifier_block *this,
|
|
unsigned long code,
|
|
void *data)
|
|
{
|
|
struct restart_notifier_block *notifier;
|
|
struct notif_data *notifdata = data;
|
|
int ret;
|
|
|
|
switch (code) {
|
|
|
|
case SUBSYS_AFTER_SHUTDOWN:
|
|
notifier = container_of(this,
|
|
struct restart_notifier_block, nb);
|
|
SMEM_INFO("%s: ssrestart for processor %d ('%s')\n",
|
|
__func__, notifier->processor,
|
|
notifier->name);
|
|
remote_spin_release(&remote_spinlock, notifier->processor);
|
|
remote_spin_release_all(notifier->processor);
|
|
break;
|
|
case SUBSYS_SOC_RESET:
|
|
if (!(smem_ramdump_dev && notifdata->enable_mini_ramdumps))
|
|
break;
|
|
case SUBSYS_RAMDUMP_NOTIFICATION:
|
|
if (!(smem_ramdump_dev && (notifdata->enable_mini_ramdumps
|
|
|| notifdata->enable_ramdump)))
|
|
break;
|
|
SMEM_DBG("%s: saving ramdump\n", __func__);
|
|
/*
|
|
* XPU protection does not currently allow the
|
|
* auxiliary memory regions to be dumped. If this
|
|
* changes, then num_smem_areas + 1 should be passed
|
|
* into do_elf_ramdump() to dump all regions.
|
|
*/
|
|
ret = do_elf_ramdump(smem_ramdump_dev,
|
|
smem_ramdump_segments, 1);
|
|
if (ret < 0)
|
|
LOG_ERR("%s: unable to dump smem %d\n", __func__, ret);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
static __init int modem_restart_late_init(void)
|
|
{
|
|
int i;
|
|
void *handle;
|
|
struct restart_notifier_block *nb;
|
|
|
|
smem_ramdump_dev = create_ramdump_device("smem", NULL);
|
|
if (IS_ERR_OR_NULL(smem_ramdump_dev)) {
|
|
LOG_ERR("%s: Unable to create smem ramdump device.\n",
|
|
__func__);
|
|
smem_ramdump_dev = NULL;
|
|
}
|
|
|
|
for (i = 0; i < ARRAY_SIZE(restart_notifiers); i++) {
|
|
nb = &restart_notifiers[i];
|
|
handle = subsys_notif_register_notifier(nb->name, &nb->nb);
|
|
SMEM_DBG("%s: registering notif for '%s', handle=%p\n",
|
|
__func__, nb->name, handle);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
late_initcall(modem_restart_late_init);
|
|
|
|
int smem_module_init_notifier_register(struct notifier_block *nb)
|
|
{
|
|
int ret;
|
|
if (!nb)
|
|
return -EINVAL;
|
|
mutex_lock(&smem_module_init_notifier_lock);
|
|
ret = raw_notifier_chain_register(&smem_module_init_notifier_list, nb);
|
|
if (smem_module_inited)
|
|
nb->notifier_call(nb, 0, NULL);
|
|
mutex_unlock(&smem_module_init_notifier_lock);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(smem_module_init_notifier_register);
|
|
|
|
int smem_module_init_notifier_unregister(struct notifier_block *nb)
|
|
{
|
|
int ret;
|
|
if (!nb)
|
|
return -EINVAL;
|
|
mutex_lock(&smem_module_init_notifier_lock);
|
|
ret = raw_notifier_chain_unregister(&smem_module_init_notifier_list,
|
|
nb);
|
|
mutex_unlock(&smem_module_init_notifier_lock);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(smem_module_init_notifier_unregister);
|
|
|
|
static void smem_module_init_notify(uint32_t state, void *data)
|
|
{
|
|
mutex_lock(&smem_module_init_notifier_lock);
|
|
smem_module_inited = 1;
|
|
raw_notifier_call_chain(&smem_module_init_notifier_list,
|
|
state, data);
|
|
mutex_unlock(&smem_module_init_notifier_lock);
|
|
}
|
|
|
|
/**
|
|
* smem_init_security_partition - Init local structures for a secured smem
|
|
* partition that has apps as one of the hosts
|
|
*
|
|
* @entry: Entry in the security TOC for the partition to init
|
|
* @num: Partition ID
|
|
*
|
|
* Initialize local data structures to point to a secured smem partition
|
|
* that is accessible by apps and another processor. Assumes that one of the
|
|
* listed hosts is apps. Verifiess that the partition is valid, otherwise will
|
|
* skip. Checks for memory corruption and will BUG() if detected. Assumes
|
|
* smem_areas is already initialized and that smem_areas[0] corresponds to the
|
|
* smem region with the secured partitions.
|
|
*/
|
|
static void smem_init_security_partition(struct smem_toc_entry *entry,
|
|
uint32_t num)
|
|
{
|
|
uint16_t remote_host;
|
|
struct smem_partition_header *hdr;
|
|
|
|
if (!entry->offset) {
|
|
SMEM_INFO("Skipping smem partition %d - bad offset\n", num);
|
|
return;
|
|
}
|
|
if (!entry->size) {
|
|
SMEM_INFO("Skipping smem partition %d - bad size\n", num);
|
|
return;
|
|
}
|
|
if (!entry->size_cacheline) {
|
|
SMEM_INFO("Skipping smem partition %d - bad cacheline\n", num);
|
|
return;
|
|
}
|
|
|
|
if (entry->host0 == SMEM_APPS)
|
|
remote_host = entry->host1;
|
|
else
|
|
remote_host = entry->host0;
|
|
|
|
if (remote_host >= NUM_SMEM_SUBSYSTEMS) {
|
|
SMEM_INFO("Skipping smem partition %d - bad remote:%d\n", num,
|
|
remote_host);
|
|
return;
|
|
}
|
|
if (partitions[remote_host].offset) {
|
|
SMEM_INFO("Skipping smem partition %d - duplicate of %d\n", num,
|
|
partitions[remote_host].partition_num);
|
|
return;
|
|
}
|
|
|
|
hdr = smem_areas[0].virt_addr + entry->offset;
|
|
|
|
if (entry->host0 != SMEM_APPS && entry->host1 != SMEM_APPS) {
|
|
SMEM_INFO(
|
|
"Non-APSS Partition %d offset:%x host0:%d host1:%d\n",
|
|
num, entry->offset, entry->host0, entry->host1);
|
|
return;
|
|
}
|
|
|
|
if (hdr->identifier != SMEM_PART_HDR_IDENTIFIER) {
|
|
LOG_ERR("Smem partition %d hdr magic is bad\n", num);
|
|
BUG();
|
|
}
|
|
if (!hdr->size) {
|
|
LOG_ERR("Smem partition %d size is 0\n", num);
|
|
BUG();
|
|
}
|
|
if (hdr->offset_free_uncached > hdr->size) {
|
|
LOG_ERR("Smem partition %d uncached heap exceeds size\n", num);
|
|
BUG();
|
|
}
|
|
if (hdr->offset_free_cached > hdr->size) {
|
|
LOG_ERR("Smem partition %d cached heap exceeds size\n", num);
|
|
BUG();
|
|
}
|
|
if (hdr->host0 != SMEM_APPS && hdr->host1 != SMEM_APPS) {
|
|
LOG_ERR("Smem partition %d hosts don't match TOC\n", num);
|
|
BUG();
|
|
}
|
|
if (hdr->host0 != remote_host && hdr->host1 != remote_host) {
|
|
LOG_ERR("Smem partition %d hosts don't match TOC\n", num);
|
|
BUG();
|
|
}
|
|
|
|
partitions[remote_host].partition_num = num;
|
|
partitions[remote_host].offset = entry->offset;
|
|
partitions[remote_host].size_cacheline = entry->size_cacheline;
|
|
SMEM_INFO("Partition %d offset:%x remote:%d\n", num, entry->offset,
|
|
remote_host);
|
|
}
|
|
|
|
/**
|
|
* smem_init_security - Init local support for secured smem
|
|
*
|
|
* Looks for a valid security TOC, and if one is found, parses it looking for
|
|
* partitions that apps can access. If any such partitions are found, do the
|
|
* required local initialization to support them. Assumes smem_areas is inited
|
|
* and smem_area[0] corresponds to the smem region with the TOC.
|
|
*/
|
|
static void smem_init_security(void)
|
|
{
|
|
struct smem_toc *toc;
|
|
uint32_t i;
|
|
|
|
SMEM_DBG("%s\n", __func__);
|
|
|
|
toc = smem_areas[0].virt_addr + smem_areas[0].size - 4 * 1024;
|
|
|
|
if (toc->identifier != SMEM_TOC_IDENTIFIER) {
|
|
LOG_ERR("%s failed: invalid TOC magic\n", __func__);
|
|
return;
|
|
}
|
|
|
|
for (i = 0; i < toc->num_entries; ++i) {
|
|
SMEM_DBG("Partition %d host0:%d host1:%d\n", i,
|
|
toc->entry[i].host0,
|
|
toc->entry[i].host1);
|
|
smem_init_security_partition(&toc->entry[i], i);
|
|
}
|
|
|
|
SMEM_DBG("%s done\n", __func__);
|
|
}
|
|
|
|
/**
|
|
* smem_init_target_info - Init smem target information
|
|
*
|
|
* @info_addr : smem target info physical address.
|
|
* @size : size of the smem target info structure.
|
|
*
|
|
* This function is used to initialize the smem_targ_info structure and checks
|
|
* for valid identifier, if identifier is valid initialize smem variables.
|
|
*/
|
|
static int smem_init_target_info(phys_addr_t info_addr, resource_size_t size)
|
|
{
|
|
struct smem_targ_info_type *smem_targ_info;
|
|
void *smem_targ_info_addr;
|
|
smem_targ_info_addr = ioremap_nocache(info_addr, size);
|
|
if (!smem_targ_info_addr) {
|
|
LOG_ERR("%s: failed ioremap_nocache() of addr:%pa size:%pa\n",
|
|
__func__, &info_addr, &size);
|
|
return -ENODEV;
|
|
}
|
|
smem_targ_info =
|
|
(struct smem_targ_info_type __iomem *)smem_targ_info_addr;
|
|
|
|
if (smem_targ_info->identifier != SMEM_TARG_INFO_IDENTIFIER) {
|
|
LOG_ERR("%s failed: invalid TARGET INFO magic\n", __func__);
|
|
return -ENODEV;
|
|
}
|
|
smem_ram_phys = smem_targ_info->phys_base_addr;
|
|
smem_ram_size = smem_targ_info->size;
|
|
iounmap(smem_targ_info_addr);
|
|
return 0;
|
|
}
|
|
|
|
static int msm_smem_probe(struct platform_device *pdev)
|
|
{
|
|
char *key;
|
|
struct resource *r;
|
|
phys_addr_t aux_mem_base;
|
|
resource_size_t aux_mem_size;
|
|
int temp_string_size = 11; /* max 3 digit count */
|
|
char temp_string[temp_string_size];
|
|
int ret;
|
|
struct ramdump_segment *ramdump_segments_tmp = NULL;
|
|
struct smem_area *smem_areas_tmp = NULL;
|
|
int smem_idx = 0;
|
|
bool security_enabled;
|
|
|
|
r = platform_get_resource_byname(pdev, IORESOURCE_MEM,
|
|
"smem_targ_info_imem");
|
|
if (r) {
|
|
if (smem_init_target_info(r->start, resource_size(r)))
|
|
goto smem_targ_info_legacy;
|
|
goto smem_targ_info_done;
|
|
}
|
|
|
|
r = platform_get_resource_byname(pdev, IORESOURCE_MEM,
|
|
"smem_targ_info_reg");
|
|
if (r) {
|
|
void *reg_base_addr;
|
|
uint64_t base_addr;
|
|
reg_base_addr = ioremap_nocache(r->start, resource_size(r));
|
|
base_addr = (uint32_t)readl_relaxed(reg_base_addr);
|
|
base_addr |=
|
|
((uint64_t)readl_relaxed(reg_base_addr + 0x4) << 32);
|
|
iounmap(reg_base_addr);
|
|
if ((base_addr == 0) || ((base_addr >> 32) != 0)) {
|
|
SMEM_INFO("%s: Invalid SMEM address\n", __func__);
|
|
goto smem_targ_info_legacy;
|
|
}
|
|
if (smem_init_target_info(base_addr,
|
|
sizeof(struct smem_targ_info_type)))
|
|
goto smem_targ_info_legacy;
|
|
goto smem_targ_info_done;
|
|
}
|
|
|
|
smem_targ_info_legacy:
|
|
SMEM_INFO("%s: reading dt-specified SMEM address\n", __func__);
|
|
r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smem");
|
|
if (r) {
|
|
smem_ram_size = resource_size(r);
|
|
smem_ram_phys = r->start;
|
|
}
|
|
|
|
smem_targ_info_done:
|
|
if (!smem_ram_phys || !smem_ram_size) {
|
|
LOG_ERR("%s: Missing SMEM TARGET INFO\n", __func__);
|
|
return -ENODEV;
|
|
}
|
|
|
|
smem_ram_base = ioremap_nocache(smem_ram_phys, smem_ram_size);
|
|
|
|
if (!smem_ram_base) {
|
|
LOG_ERR("%s: ioremap_nocache() of addr:%pa size: %pa\n",
|
|
__func__,
|
|
&smem_ram_phys, &smem_ram_size);
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (!smem_initialized_check())
|
|
return -ENODEV;
|
|
|
|
/*
|
|
* The software implementation requires smem_find(), which needs
|
|
* smem_ram_base to be intitialized. The remote spinlock item is
|
|
* guarenteed to be allocated by the bootloader, so this is the
|
|
* safest and earliest place to init the spinlock.
|
|
*/
|
|
ret = init_smem_remote_spinlock();
|
|
if (ret) {
|
|
LOG_ERR("%s: remote spinlock init failed %d\n", __func__, ret);
|
|
return ret;
|
|
}
|
|
|
|
key = "irq-reg-base";
|
|
r = platform_get_resource_byname(pdev, IORESOURCE_MEM, key);
|
|
if (!r) {
|
|
LOG_ERR("%s: missing '%s'\n", __func__, key);
|
|
return -ENODEV;
|
|
}
|
|
|
|
num_smem_areas = 1;
|
|
while (1) {
|
|
scnprintf(temp_string, temp_string_size, "aux-mem%d",
|
|
num_smem_areas);
|
|
r = platform_get_resource_byname(pdev, IORESOURCE_MEM,
|
|
temp_string);
|
|
if (!r)
|
|
break;
|
|
|
|
++num_smem_areas;
|
|
if (num_smem_areas > 999) {
|
|
LOG_ERR("%s: max num aux mem regions reached\n",
|
|
__func__);
|
|
break;
|
|
}
|
|
}
|
|
/* Initialize main SMEM region and SSR ramdump region */
|
|
smem_areas_tmp = kmalloc_array(num_smem_areas, sizeof(struct smem_area),
|
|
GFP_KERNEL);
|
|
if (!smem_areas_tmp) {
|
|
LOG_ERR("%s: smem areas kmalloc failed\n", __func__);
|
|
ret = -ENOMEM;
|
|
goto free_smem_areas;
|
|
}
|
|
|
|
ramdump_segments_tmp = kcalloc(num_smem_areas,
|
|
sizeof(struct ramdump_segment), GFP_KERNEL);
|
|
if (!ramdump_segments_tmp) {
|
|
LOG_ERR("%s: ramdump segment kmalloc failed\n", __func__);
|
|
ret = -ENOMEM;
|
|
goto free_smem_areas;
|
|
}
|
|
smem_areas_tmp[smem_idx].phys_addr = smem_ram_phys;
|
|
smem_areas_tmp[smem_idx].size = smem_ram_size;
|
|
smem_areas_tmp[smem_idx].virt_addr = smem_ram_base;
|
|
|
|
ramdump_segments_tmp[smem_idx].address = smem_ram_phys;
|
|
ramdump_segments_tmp[smem_idx].size = smem_ram_size;
|
|
++smem_idx;
|
|
|
|
/* Configure auxiliary SMEM regions */
|
|
while (1) {
|
|
scnprintf(temp_string, temp_string_size, "aux-mem%d",
|
|
smem_idx);
|
|
r = platform_get_resource_byname(pdev, IORESOURCE_MEM,
|
|
temp_string);
|
|
if (!r)
|
|
break;
|
|
aux_mem_base = r->start;
|
|
aux_mem_size = resource_size(r);
|
|
|
|
ramdump_segments_tmp[smem_idx].address = aux_mem_base;
|
|
ramdump_segments_tmp[smem_idx].size = aux_mem_size;
|
|
|
|
smem_areas_tmp[smem_idx].phys_addr = aux_mem_base;
|
|
smem_areas_tmp[smem_idx].size = aux_mem_size;
|
|
smem_areas_tmp[smem_idx].virt_addr = ioremap_nocache(
|
|
(unsigned long)(smem_areas_tmp[smem_idx].phys_addr),
|
|
smem_areas_tmp[smem_idx].size);
|
|
SMEM_DBG("%s: %s = %pa %pa -> %p", __func__, temp_string,
|
|
&aux_mem_base, &aux_mem_size,
|
|
smem_areas_tmp[smem_idx].virt_addr);
|
|
|
|
if (!smem_areas_tmp[smem_idx].virt_addr) {
|
|
LOG_ERR("%s: ioremap_nocache() of addr:%pa size: %pa\n",
|
|
__func__,
|
|
&smem_areas_tmp[smem_idx].phys_addr,
|
|
&smem_areas_tmp[smem_idx].size);
|
|
ret = -ENOMEM;
|
|
goto free_smem_areas;
|
|
}
|
|
|
|
if (OVERFLOW_ADD_UNSIGNED(uintptr_t,
|
|
(uintptr_t)smem_areas_tmp[smem_idx].virt_addr,
|
|
smem_areas_tmp[smem_idx].size)) {
|
|
LOG_ERR(
|
|
"%s: invalid virtual address block %i: %p:%pa\n",
|
|
__func__, smem_idx,
|
|
smem_areas_tmp[smem_idx].virt_addr,
|
|
&smem_areas_tmp[smem_idx].size);
|
|
++smem_idx;
|
|
ret = -EINVAL;
|
|
goto free_smem_areas;
|
|
}
|
|
|
|
++smem_idx;
|
|
if (smem_idx > 999) {
|
|
LOG_ERR("%s: max num aux mem regions reached\n",
|
|
__func__);
|
|
break;
|
|
}
|
|
}
|
|
|
|
smem_areas = smem_areas_tmp;
|
|
smem_ramdump_segments = ramdump_segments_tmp;
|
|
|
|
key = "qcom,mpu-enabled";
|
|
security_enabled = of_property_read_bool(pdev->dev.of_node, key);
|
|
if (security_enabled) {
|
|
SMEM_INFO("smem security enabled\n");
|
|
smem_init_security();
|
|
}
|
|
|
|
probe_done = true;
|
|
|
|
ret = of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev);
|
|
if (ret)
|
|
LOG_ERR("%s: of_platform_populate failed %d\n", __func__, ret);
|
|
|
|
return 0;
|
|
|
|
free_smem_areas:
|
|
for (smem_idx = smem_idx - 1; smem_idx >= 1; --smem_idx)
|
|
iounmap(smem_areas_tmp[smem_idx].virt_addr);
|
|
|
|
num_smem_areas = 0;
|
|
kfree(ramdump_segments_tmp);
|
|
kfree(smem_areas_tmp);
|
|
return ret;
|
|
}
|
|
|
|
static struct of_device_id msm_smem_match_table[] = {
|
|
{ .compatible = "qcom,smem" },
|
|
{},
|
|
};
|
|
|
|
static struct platform_driver msm_smem_driver = {
|
|
.probe = msm_smem_probe,
|
|
.driver = {
|
|
.name = "msm_smem",
|
|
.owner = THIS_MODULE,
|
|
.of_match_table = msm_smem_match_table,
|
|
},
|
|
};
|
|
|
|
int __init msm_smem_init(void)
|
|
{
|
|
static bool registered;
|
|
int rc;
|
|
|
|
if (registered)
|
|
return 0;
|
|
|
|
registered = true;
|
|
|
|
smem_ipc_log_ctx = ipc_log_context_create(NUM_LOG_PAGES, "smem", 0);
|
|
if (!smem_ipc_log_ctx) {
|
|
pr_err("%s: unable to create logging context\n", __func__);
|
|
msm_smem_debug_mask = 0;
|
|
}
|
|
|
|
rc = platform_driver_register(&msm_smem_driver);
|
|
if (rc) {
|
|
LOG_ERR("%s: msm_smem_driver register failed %d\n",
|
|
__func__, rc);
|
|
return rc;
|
|
}
|
|
|
|
smem_module_init_notify(0, NULL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
arch_initcall(msm_smem_init);
|