The Shared Memory Manager driver implements an interface for allocating and accessing items in the memory area shared among all of the processors in a Qualcomm platform. Adapted from the Linux driver (4.17) Changes from the original Linux driver: * Removed HW spinlock mechanism, which is irrelevant in U-boot particualar use case, which is just reading from the smem. * Adapted from Linux driver model to U-Boot's. Cc: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: Ramon Fried <ramon.fried@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>lime2-spi
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menuconfig SMEM |
menuconfig SMEM |
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bool "SMEM (Shared Memory mamanger) support" |
bool "SMEM (Shared Memory mamanger) support" |
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if SMEM |
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config MSM_SMEM |
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bool "Qualcomm Shared Memory Manager (SMEM)" |
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depends on DM |
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depends on ARCH_SNAPDRAGON |
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help |
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Enable support for the Qualcomm Shared Memory Manager. |
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The driver provides an interface to items in a heap shared among all |
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processors in a Qualcomm platform. |
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endif # menu "SMEM Support" |
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@ -0,0 +1,932 @@ |
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2015, Sony Mobile Communications AB. |
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* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved. |
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* Copyright (c) 2018, Ramon Fried <ramon.fried@gmail.com> |
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*/ |
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#include <common.h> |
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#include <errno.h> |
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#include <dm.h> |
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#include <dm/of_access.h> |
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#include <dm/of_addr.h> |
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#include <asm/io.h> |
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#include <linux/ioport.h> |
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#include <linux/io.h> |
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#include <smem.h> |
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DECLARE_GLOBAL_DATA_PTR; |
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/*
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* The Qualcomm shared memory system is an allocate-only heap structure that |
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* consists of one of more memory areas that can be accessed by the processors |
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* in the SoC. |
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* |
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* All systems contains a global heap, accessible by all processors in the SoC, |
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* with a table of contents data structure (@smem_header) at the beginning of |
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* the main shared memory block. |
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* |
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* The global header contains meta data for allocations as well as a fixed list |
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* of 512 entries (@smem_global_entry) that can be initialized to reference |
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* parts of the shared memory space. |
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* |
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* |
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* In addition to this global heap, a set of "private" heaps can be set up at |
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* boot time with access restrictions so that only certain processor pairs can |
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* access the data. |
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* |
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* These partitions are referenced from an optional partition table |
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* (@smem_ptable), that is found 4kB from the end of the main smem region. The |
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* partition table entries (@smem_ptable_entry) lists the involved processors |
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* (or hosts) and their location in the main shared memory region. |
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* |
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* Each partition starts with a header (@smem_partition_header) that identifies |
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* the partition and holds properties for the two internal memory regions. The |
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* two regions are cached and non-cached memory respectively. Each region |
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* contain a link list of allocation headers (@smem_private_entry) followed by |
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* their data. |
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* |
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* Items in the non-cached region are allocated from the start of the partition |
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* while items in the cached region are allocated from the end. The free area |
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* is hence the region between the cached and non-cached offsets. The header of |
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* cached items comes after the data. |
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* |
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* Version 12 (SMEM_GLOBAL_PART_VERSION) changes the item alloc/get procedure |
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* for the global heap. A new global partition is created from the global heap |
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* region with partition type (SMEM_GLOBAL_HOST) and the max smem item count is |
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* set by the bootloader. |
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* |
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*/ |
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/*
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* The version member of the smem header contains an array of versions for the |
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* various software components in the SoC. We verify that the boot loader |
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* version is a valid version as a sanity check. |
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*/ |
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#define SMEM_MASTER_SBL_VERSION_INDEX 7 |
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#define SMEM_GLOBAL_HEAP_VERSION 11 |
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#define SMEM_GLOBAL_PART_VERSION 12 |
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/*
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* The first 8 items are only to be allocated by the boot loader while |
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* initializing the heap. |
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*/ |
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#define SMEM_ITEM_LAST_FIXED 8 |
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/* Highest accepted item number, for both global and private heaps */ |
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#define SMEM_ITEM_COUNT 512 |
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/* Processor/host identifier for the application processor */ |
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#define SMEM_HOST_APPS 0 |
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/* Processor/host identifier for the global partition */ |
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#define SMEM_GLOBAL_HOST 0xfffe |
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/* Max number of processors/hosts in a system */ |
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#define SMEM_HOST_COUNT 10 |
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/**
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* struct smem_proc_comm - proc_comm communication struct (legacy) |
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* @command: current command to be executed |
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* @status: status of the currently requested command |
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* @params: parameters to the command |
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*/ |
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struct smem_proc_comm { |
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__le32 command; |
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__le32 status; |
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__le32 params[2]; |
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}; |
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/**
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* struct smem_global_entry - entry to reference smem items on the heap |
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* @allocated: boolean to indicate if this entry is used |
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* @offset: offset to the allocated space |
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* @size: size of the allocated space, 8 byte aligned |
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* @aux_base: base address for the memory region used by this unit, or 0 for |
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* the default region. bits 0,1 are reserved |
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*/ |
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struct smem_global_entry { |
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__le32 allocated; |
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__le32 offset; |
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__le32 size; |
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__le32 aux_base; /* bits 1:0 reserved */ |
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}; |
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#define AUX_BASE_MASK 0xfffffffc |
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/**
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* struct smem_header - header found in beginning of primary smem region |
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* @proc_comm: proc_comm communication interface (legacy) |
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* @version: array of versions for the various subsystems |
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* @initialized: boolean to indicate that smem is initialized |
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* @free_offset: index of the first unallocated byte in smem |
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* @available: number of bytes available for allocation |
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* @reserved: reserved field, must be 0 |
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* toc: array of references to items |
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*/ |
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struct smem_header { |
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struct smem_proc_comm proc_comm[4]; |
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__le32 version[32]; |
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__le32 initialized; |
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__le32 free_offset; |
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__le32 available; |
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__le32 reserved; |
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struct smem_global_entry toc[SMEM_ITEM_COUNT]; |
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}; |
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/**
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* struct smem_ptable_entry - one entry in the @smem_ptable list |
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* @offset: offset, within the main shared memory region, of the partition |
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* @size: size of the partition |
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* @flags: flags for the partition (currently unused) |
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* @host0: first processor/host with access to this partition |
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* @host1: second processor/host with access to this partition |
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* @cacheline: alignment for "cached" entries |
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* @reserved: reserved entries for later use |
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*/ |
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struct smem_ptable_entry { |
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__le32 offset; |
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__le32 size; |
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__le32 flags; |
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__le16 host0; |
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__le16 host1; |
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__le32 cacheline; |
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__le32 reserved[7]; |
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}; |
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/**
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* struct smem_ptable - partition table for the private partitions |
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* @magic: magic number, must be SMEM_PTABLE_MAGIC |
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* @version: version of the partition table |
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* @num_entries: number of partitions in the table |
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* @reserved: for now reserved entries |
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* @entry: list of @smem_ptable_entry for the @num_entries partitions |
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*/ |
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struct smem_ptable { |
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u8 magic[4]; |
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__le32 version; |
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__le32 num_entries; |
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__le32 reserved[5]; |
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struct smem_ptable_entry entry[]; |
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}; |
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static const u8 SMEM_PTABLE_MAGIC[] = { 0x24, 0x54, 0x4f, 0x43 }; /* "$TOC" */ |
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/**
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* struct smem_partition_header - header of the partitions |
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* @magic: magic number, must be SMEM_PART_MAGIC |
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* @host0: first processor/host with access to this partition |
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* @host1: second processor/host with access to this partition |
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* @size: size of the partition |
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* @offset_free_uncached: offset to the first free byte of uncached memory in |
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* this partition |
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* @offset_free_cached: offset to the first free byte of cached memory in this |
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* partition |
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* @reserved: for now reserved entries |
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*/ |
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struct smem_partition_header { |
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u8 magic[4]; |
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__le16 host0; |
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__le16 host1; |
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__le32 size; |
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__le32 offset_free_uncached; |
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__le32 offset_free_cached; |
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__le32 reserved[3]; |
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}; |
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static const u8 SMEM_PART_MAGIC[] = { 0x24, 0x50, 0x52, 0x54 }; |
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/**
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* struct smem_private_entry - header of each item in the private partition |
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* @canary: magic number, must be SMEM_PRIVATE_CANARY |
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* @item: identifying number of the smem item |
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* @size: size of the data, including padding bytes |
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* @padding_data: number of bytes of padding of data |
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* @padding_hdr: number of bytes of padding between the header and the data |
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* @reserved: for now reserved entry |
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*/ |
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struct smem_private_entry { |
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u16 canary; /* bytes are the same so no swapping needed */ |
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__le16 item; |
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__le32 size; /* includes padding bytes */ |
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__le16 padding_data; |
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__le16 padding_hdr; |
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__le32 reserved; |
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}; |
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#define SMEM_PRIVATE_CANARY 0xa5a5 |
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/**
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* struct smem_info - smem region info located after the table of contents |
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* @magic: magic number, must be SMEM_INFO_MAGIC |
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* @size: size of the smem region |
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* @base_addr: base address of the smem region |
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* @reserved: for now reserved entry |
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* @num_items: highest accepted item number |
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*/ |
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struct smem_info { |
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u8 magic[4]; |
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__le32 size; |
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__le32 base_addr; |
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__le32 reserved; |
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__le16 num_items; |
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}; |
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static const u8 SMEM_INFO_MAGIC[] = { 0x53, 0x49, 0x49, 0x49 }; /* SIII */ |
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/**
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* struct smem_region - representation of a chunk of memory used for smem |
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* @aux_base: identifier of aux_mem base |
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* @virt_base: virtual base address of memory with this aux_mem identifier |
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* @size: size of the memory region |
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*/ |
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struct smem_region { |
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u32 aux_base; |
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void __iomem *virt_base; |
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size_t size; |
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}; |
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/**
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* struct qcom_smem - device data for the smem device |
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* @dev: device pointer |
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* @global_partition: pointer to global partition when in use |
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* @global_cacheline: cacheline size for global partition |
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* @partitions: list of pointers to partitions affecting the current |
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* processor/host |
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* @cacheline: list of cacheline sizes for each host |
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* @item_count: max accepted item number |
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* @num_regions: number of @regions |
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* @regions: list of the memory regions defining the shared memory |
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*/ |
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struct qcom_smem { |
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struct udevice *dev; |
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struct smem_partition_header *global_partition; |
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size_t global_cacheline; |
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struct smem_partition_header *partitions[SMEM_HOST_COUNT]; |
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size_t cacheline[SMEM_HOST_COUNT]; |
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u32 item_count; |
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unsigned int num_regions; |
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struct smem_region regions[0]; |
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}; |
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static struct smem_private_entry * |
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phdr_to_last_uncached_entry(struct smem_partition_header *phdr) |
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{ |
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void *p = phdr; |
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return p + le32_to_cpu(phdr->offset_free_uncached); |
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} |
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static void *phdr_to_first_cached_entry(struct smem_partition_header *phdr, |
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size_t cacheline) |
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{ |
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void *p = phdr; |
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return p + le32_to_cpu(phdr->size) - ALIGN(sizeof(*phdr), cacheline); |
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} |
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static void *phdr_to_last_cached_entry(struct smem_partition_header *phdr) |
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{ |
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void *p = phdr; |
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return p + le32_to_cpu(phdr->offset_free_cached); |
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} |
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static struct smem_private_entry * |
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phdr_to_first_uncached_entry(struct smem_partition_header *phdr) |
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{ |
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void *p = phdr; |
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return p + sizeof(*phdr); |
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} |
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static struct smem_private_entry * |
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uncached_entry_next(struct smem_private_entry *e) |
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{ |
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void *p = e; |
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return p + sizeof(*e) + le16_to_cpu(e->padding_hdr) + |
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le32_to_cpu(e->size); |
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} |
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static struct smem_private_entry * |
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cached_entry_next(struct smem_private_entry *e, size_t cacheline) |
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{ |
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void *p = e; |
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return p - le32_to_cpu(e->size) - ALIGN(sizeof(*e), cacheline); |
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} |
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static void *uncached_entry_to_item(struct smem_private_entry *e) |
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{ |
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void *p = e; |
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return p + sizeof(*e) + le16_to_cpu(e->padding_hdr); |
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} |
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static void *cached_entry_to_item(struct smem_private_entry *e) |
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{ |
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void *p = e; |
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return p - le32_to_cpu(e->size); |
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} |
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/* Pointer to the one and only smem handle */ |
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static struct qcom_smem *__smem; |
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static int qcom_smem_alloc_private(struct qcom_smem *smem, |
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struct smem_partition_header *phdr, |
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unsigned int item, |
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size_t size) |
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{ |
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struct smem_private_entry *hdr, *end; |
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size_t alloc_size; |
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void *cached; |
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hdr = phdr_to_first_uncached_entry(phdr); |
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end = phdr_to_last_uncached_entry(phdr); |
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cached = phdr_to_last_cached_entry(phdr); |
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while (hdr < end) { |
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if (hdr->canary != SMEM_PRIVATE_CANARY) { |
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dev_err(smem->dev, |
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"Found invalid canary in hosts %d:%d partition\n", |
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phdr->host0, phdr->host1); |
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return -EINVAL; |
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} |
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if (le16_to_cpu(hdr->item) == item) |
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return -EEXIST; |
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hdr = uncached_entry_next(hdr); |
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} |
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/* Check that we don't grow into the cached region */ |
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alloc_size = sizeof(*hdr) + ALIGN(size, 8); |
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if ((void *)hdr + alloc_size >= cached) { |
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dev_err(smem->dev, "Out of memory\n"); |
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return -ENOSPC; |
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} |
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hdr->canary = SMEM_PRIVATE_CANARY; |
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hdr->item = cpu_to_le16(item); |
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hdr->size = cpu_to_le32(ALIGN(size, 8)); |
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hdr->padding_data = cpu_to_le16(le32_to_cpu(hdr->size) - size); |
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hdr->padding_hdr = 0; |
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/*
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* Ensure the header is written before we advance the free offset, so |
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* that remote processors that does not take the remote spinlock still |
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* gets a consistent view of the linked list. |
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*/ |
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dmb(); |
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le32_add_cpu(&phdr->offset_free_uncached, alloc_size); |
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return 0; |
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} |
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static int qcom_smem_alloc_global(struct qcom_smem *smem, |
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unsigned int item, |
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size_t size) |
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{ |
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struct smem_global_entry *entry; |
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struct smem_header *header; |
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header = smem->regions[0].virt_base; |
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entry = &header->toc[item]; |
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if (entry->allocated) |
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return -EEXIST; |
||||||
|
|
||||||
|
size = ALIGN(size, 8); |
||||||
|
if (WARN_ON(size > le32_to_cpu(header->available))) |
||||||
|
return -ENOMEM; |
||||||
|
|
||||||
|
entry->offset = header->free_offset; |
||||||
|
entry->size = cpu_to_le32(size); |
||||||
|
|
||||||
|
/*
|
||||||
|
* Ensure the header is consistent before we mark the item allocated, |
||||||
|
* so that remote processors will get a consistent view of the item |
||||||
|
* even though they do not take the spinlock on read. |
||||||
|
*/ |
||||||
|
dmb(); |
||||||
|
entry->allocated = cpu_to_le32(1); |
||||||
|
|
||||||
|
le32_add_cpu(&header->free_offset, size); |
||||||
|
le32_add_cpu(&header->available, -size); |
||||||
|
|
||||||
|
return 0; |
||||||
|
} |
||||||
|
|
||||||
|
/**
|
||||||
|
* qcom_smem_alloc() - allocate space for a smem item |
||||||
|
* @host: remote processor id, or -1 |
||||||
|
* @item: smem item handle |
||||||
|
* @size: number of bytes to be allocated |
||||||
|
* |
||||||
|
* Allocate space for a given smem item of size @size, given that the item is |
||||||
|
* not yet allocated. |
||||||
|
*/ |
||||||
|
static int qcom_smem_alloc(unsigned int host, unsigned int item, size_t size) |
||||||
|
{ |
||||||
|
struct smem_partition_header *phdr; |
||||||
|
int ret; |
||||||
|
|
||||||
|
if (!__smem) |
||||||
|
return -EPROBE_DEFER; |
||||||
|
|
||||||
|
if (item < SMEM_ITEM_LAST_FIXED) { |
||||||
|
dev_err(__smem->dev, |
||||||
|
"Rejecting allocation of static entry %d\n", item); |
||||||
|
return -EINVAL; |
||||||
|
} |
||||||
|
|
||||||
|
if (WARN_ON(item >= __smem->item_count)) |
||||||
|
return -EINVAL; |
||||||
|
|
||||||
|
if (host < SMEM_HOST_COUNT && __smem->partitions[host]) { |
||||||
|
phdr = __smem->partitions[host]; |
||||||
|
ret = qcom_smem_alloc_private(__smem, phdr, item, size); |
||||||
|
} else if (__smem->global_partition) { |
||||||
|
phdr = __smem->global_partition; |
||||||
|
ret = qcom_smem_alloc_private(__smem, phdr, item, size); |
||||||
|
} else { |
||||||
|
ret = qcom_smem_alloc_global(__smem, item, size); |
||||||
|
} |
||||||
|
|
||||||
|
return ret; |
||||||
|
} |
||||||
|
|
||||||
|
static void *qcom_smem_get_global(struct qcom_smem *smem, |
||||||
|
unsigned int item, |
||||||
|
size_t *size) |
||||||
|
{ |
||||||
|
struct smem_header *header; |
||||||
|
struct smem_region *area; |
||||||
|
struct smem_global_entry *entry; |
||||||
|
u32 aux_base; |
||||||
|
unsigned int i; |
||||||
|
|
||||||
|
header = smem->regions[0].virt_base; |
||||||
|
entry = &header->toc[item]; |
||||||
|
if (!entry->allocated) |
||||||
|
return ERR_PTR(-ENXIO); |
||||||
|
|
||||||
|
aux_base = le32_to_cpu(entry->aux_base) & AUX_BASE_MASK; |
||||||
|
|
||||||
|
for (i = 0; i < smem->num_regions; i++) { |
||||||
|
area = &smem->regions[i]; |
||||||
|
|
||||||
|
if (area->aux_base == aux_base || !aux_base) { |
||||||
|
if (size != NULL) |
||||||
|
*size = le32_to_cpu(entry->size); |
||||||
|
return area->virt_base + le32_to_cpu(entry->offset); |
||||||
|
} |
||||||
|
} |
||||||
|
|
||||||
|
return ERR_PTR(-ENOENT); |
||||||
|
} |
||||||
|
|
||||||
|
static void *qcom_smem_get_private(struct qcom_smem *smem, |
||||||
|
struct smem_partition_header *phdr, |
||||||
|
size_t cacheline, |
||||||
|
unsigned int item, |
||||||
|
size_t *size) |
||||||
|
{ |
||||||
|
struct smem_private_entry *e, *end; |
||||||
|
|
||||||
|
e = phdr_to_first_uncached_entry(phdr); |
||||||
|
end = phdr_to_last_uncached_entry(phdr); |
||||||
|
|
||||||
|
while (e < end) { |
||||||
|
if (e->canary != SMEM_PRIVATE_CANARY) |
||||||
|
goto invalid_canary; |
||||||
|
|
||||||
|
if (le16_to_cpu(e->item) == item) { |
||||||
|
if (size != NULL) |
||||||
|
*size = le32_to_cpu(e->size) - |
||||||
|
le16_to_cpu(e->padding_data); |
||||||
|
|
||||||
|
return uncached_entry_to_item(e); |
||||||
|
} |
||||||
|
|
||||||
|
e = uncached_entry_next(e); |
||||||
|
} |
||||||
|
|
||||||
|
/* Item was not found in the uncached list, search the cached list */ |
||||||
|
|
||||||
|
e = phdr_to_first_cached_entry(phdr, cacheline); |
||||||
|
end = phdr_to_last_cached_entry(phdr); |
||||||
|
|
||||||
|
while (e > end) { |
||||||
|
if (e->canary != SMEM_PRIVATE_CANARY) |
||||||
|
goto invalid_canary; |
||||||
|
|
||||||
|
if (le16_to_cpu(e->item) == item) { |
||||||
|
if (size != NULL) |
||||||
|
*size = le32_to_cpu(e->size) - |
||||||
|
le16_to_cpu(e->padding_data); |
||||||
|
|
||||||
|
return cached_entry_to_item(e); |
||||||
|
} |
||||||
|
|
||||||
|
e = cached_entry_next(e, cacheline); |
||||||
|
} |
||||||
|
|
||||||
|
return ERR_PTR(-ENOENT); |
||||||
|
|
||||||
|
invalid_canary: |
||||||
|
dev_err(smem->dev, "Found invalid canary in hosts %d:%d partition\n", |
||||||
|
phdr->host0, phdr->host1); |
||||||
|
|
||||||
|
return ERR_PTR(-EINVAL); |
||||||
|
} |
||||||
|
|
||||||
|
/**
|
||||||
|
* qcom_smem_get() - resolve ptr of size of a smem item |
||||||
|
* @host: the remote processor, or -1 |
||||||
|
* @item: smem item handle |
||||||
|
* @size: pointer to be filled out with size of the item |
||||||
|
* |
||||||
|
* Looks up smem item and returns pointer to it. Size of smem |
||||||
|
* item is returned in @size. |
||||||
|
*/ |
||||||
|
static void *qcom_smem_get(unsigned int host, unsigned int item, size_t *size) |
||||||
|
{ |
||||||
|
struct smem_partition_header *phdr; |
||||||
|
size_t cacheln; |
||||||
|
void *ptr = ERR_PTR(-EPROBE_DEFER); |
||||||
|
|
||||||
|
if (!__smem) |
||||||
|
return ptr; |
||||||
|
|
||||||
|
if (WARN_ON(item >= __smem->item_count)) |
||||||
|
return ERR_PTR(-EINVAL); |
||||||
|
|
||||||
|
if (host < SMEM_HOST_COUNT && __smem->partitions[host]) { |
||||||
|
phdr = __smem->partitions[host]; |
||||||
|
cacheln = __smem->cacheline[host]; |
||||||
|
ptr = qcom_smem_get_private(__smem, phdr, cacheln, item, size); |
||||||
|
} else if (__smem->global_partition) { |
||||||
|
phdr = __smem->global_partition; |
||||||
|
cacheln = __smem->global_cacheline; |
||||||
|
ptr = qcom_smem_get_private(__smem, phdr, cacheln, item, size); |
||||||
|
} else { |
||||||
|
ptr = qcom_smem_get_global(__smem, item, size); |
||||||
|
} |
||||||
|
|
||||||
|
return ptr; |
||||||
|
|
||||||
|
} |
||||||
|
|
||||||
|
/**
|
||||||
|
* qcom_smem_get_free_space() - retrieve amount of free space in a partition |
||||||
|
* @host: the remote processor identifying a partition, or -1 |
||||||
|
* |
||||||
|
* To be used by smem clients as a quick way to determine if any new |
||||||
|
* allocations has been made. |
||||||
|
*/ |
||||||
|
static int qcom_smem_get_free_space(unsigned int host) |
||||||
|
{ |
||||||
|
struct smem_partition_header *phdr; |
||||||
|
struct smem_header *header; |
||||||
|
unsigned int ret; |
||||||
|
|
||||||
|
if (!__smem) |
||||||
|
return -EPROBE_DEFER; |
||||||
|
|
||||||
|
if (host < SMEM_HOST_COUNT && __smem->partitions[host]) { |
||||||
|
phdr = __smem->partitions[host]; |
||||||
|
ret = le32_to_cpu(phdr->offset_free_cached) - |
||||||
|
le32_to_cpu(phdr->offset_free_uncached); |
||||||
|
} else if (__smem->global_partition) { |
||||||
|
phdr = __smem->global_partition; |
||||||
|
ret = le32_to_cpu(phdr->offset_free_cached) - |
||||||
|
le32_to_cpu(phdr->offset_free_uncached); |
||||||
|
} else { |
||||||
|
header = __smem->regions[0].virt_base; |
||||||
|
ret = le32_to_cpu(header->available); |
||||||
|
} |
||||||
|
|
||||||
|
return ret; |
||||||
|
} |
||||||
|
|
||||||
|
static int qcom_smem_get_sbl_version(struct qcom_smem *smem) |
||||||
|
{ |
||||||
|
struct smem_header *header; |
||||||
|
__le32 *versions; |
||||||
|
|
||||||
|
header = smem->regions[0].virt_base; |
||||||
|
versions = header->version; |
||||||
|
|
||||||
|
return le32_to_cpu(versions[SMEM_MASTER_SBL_VERSION_INDEX]); |
||||||
|
} |
||||||
|
|
||||||
|
static struct smem_ptable *qcom_smem_get_ptable(struct qcom_smem *smem) |
||||||
|
{ |
||||||
|
struct smem_ptable *ptable; |
||||||
|
u32 version; |
||||||
|
|
||||||
|
ptable = smem->regions[0].virt_base + smem->regions[0].size - SZ_4K; |
||||||
|
if (memcmp(ptable->magic, SMEM_PTABLE_MAGIC, sizeof(ptable->magic))) |
||||||
|
return ERR_PTR(-ENOENT); |
||||||
|
|
||||||
|
version = le32_to_cpu(ptable->version); |
||||||
|
if (version != 1) { |
||||||
|
dev_err(smem->dev, |
||||||
|
"Unsupported partition header version %d\n", version); |
||||||
|
return ERR_PTR(-EINVAL); |
||||||
|
} |
||||||
|
return ptable; |
||||||
|
} |
||||||
|
|
||||||
|
static u32 qcom_smem_get_item_count(struct qcom_smem *smem) |
||||||
|
{ |
||||||
|
struct smem_ptable *ptable; |
||||||
|
struct smem_info *info; |
||||||
|
|
||||||
|
ptable = qcom_smem_get_ptable(smem); |
||||||
|
if (IS_ERR_OR_NULL(ptable)) |
||||||
|
return SMEM_ITEM_COUNT; |
||||||
|
|
||||||
|
info = (struct smem_info *)&ptable->entry[ptable->num_entries]; |
||||||
|
if (memcmp(info->magic, SMEM_INFO_MAGIC, sizeof(info->magic))) |
||||||
|
return SMEM_ITEM_COUNT; |
||||||
|
|
||||||
|
return le16_to_cpu(info->num_items); |
||||||
|
} |
||||||
|
|
||||||
|
static int qcom_smem_set_global_partition(struct qcom_smem *smem) |
||||||
|
{ |
||||||
|
struct smem_partition_header *header; |
||||||
|
struct smem_ptable_entry *entry = NULL; |
||||||
|
struct smem_ptable *ptable; |
||||||
|
u32 host0, host1, size; |
||||||
|
int i; |
||||||
|
|
||||||
|
ptable = qcom_smem_get_ptable(smem); |
||||||
|
if (IS_ERR(ptable)) |
||||||
|
return PTR_ERR(ptable); |
||||||
|
|
||||||
|
for (i = 0; i < le32_to_cpu(ptable->num_entries); i++) { |
||||||
|
entry = &ptable->entry[i]; |
||||||
|
host0 = le16_to_cpu(entry->host0); |
||||||
|
host1 = le16_to_cpu(entry->host1); |
||||||
|
|
||||||
|
if (host0 == SMEM_GLOBAL_HOST && host0 == host1) |
||||||
|
break; |
||||||
|
} |
||||||
|
|
||||||
|
if (!entry) { |
||||||
|
dev_err(smem->dev, "Missing entry for global partition\n"); |
||||||
|
return -EINVAL; |
||||||
|
} |
||||||
|
|
||||||
|
if (!le32_to_cpu(entry->offset) || !le32_to_cpu(entry->size)) { |
||||||
|
dev_err(smem->dev, "Invalid entry for global partition\n"); |
||||||
|
return -EINVAL; |
||||||
|
} |
||||||
|
|
||||||
|
if (smem->global_partition) { |
||||||
|
dev_err(smem->dev, "Already found the global partition\n"); |
||||||
|
return -EINVAL; |
||||||
|
} |
||||||
|
|
||||||
|
header = smem->regions[0].virt_base + le32_to_cpu(entry->offset); |
||||||
|
host0 = le16_to_cpu(header->host0); |
||||||
|
host1 = le16_to_cpu(header->host1); |
||||||
|
|
||||||
|
if (memcmp(header->magic, SMEM_PART_MAGIC, sizeof(header->magic))) { |
||||||
|
dev_err(smem->dev, "Global partition has invalid magic\n"); |
||||||
|
return -EINVAL; |
||||||
|
} |
||||||
|
|
||||||
|
if (host0 != SMEM_GLOBAL_HOST && host1 != SMEM_GLOBAL_HOST) { |
||||||
|
dev_err(smem->dev, "Global partition hosts are invalid\n"); |
||||||
|
return -EINVAL; |
||||||
|
} |
||||||
|
|
||||||
|
if (le32_to_cpu(header->size) != le32_to_cpu(entry->size)) { |
||||||
|
dev_err(smem->dev, "Global partition has invalid size\n"); |
||||||
|
return -EINVAL; |
||||||
|
} |
||||||
|
|
||||||
|
size = le32_to_cpu(header->offset_free_uncached); |
||||||
|
if (size > le32_to_cpu(header->size)) { |
||||||
|
dev_err(smem->dev, |
||||||
|
"Global partition has invalid free pointer\n"); |
||||||
|
return -EINVAL; |
||||||
|
} |
||||||
|
|
||||||
|
smem->global_partition = header; |
||||||
|
smem->global_cacheline = le32_to_cpu(entry->cacheline); |
||||||
|
|
||||||
|
return 0; |
||||||
|
} |
||||||
|
|
||||||
|
static int qcom_smem_enumerate_partitions(struct qcom_smem *smem, |
||||||
|
unsigned int local_host) |
||||||
|
{ |
||||||
|
struct smem_partition_header *header; |
||||||
|
struct smem_ptable_entry *entry; |
||||||
|
struct smem_ptable *ptable; |
||||||
|
unsigned int remote_host; |
||||||
|
u32 host0, host1; |
||||||
|
int i; |
||||||
|
|
||||||
|
ptable = qcom_smem_get_ptable(smem); |
||||||
|
if (IS_ERR(ptable)) |
||||||
|
return PTR_ERR(ptable); |
||||||
|
|
||||||
|
for (i = 0; i < le32_to_cpu(ptable->num_entries); i++) { |
||||||
|
entry = &ptable->entry[i]; |
||||||
|
host0 = le16_to_cpu(entry->host0); |
||||||
|
host1 = le16_to_cpu(entry->host1); |
||||||
|
|
||||||
|
if (host0 != local_host && host1 != local_host) |
||||||
|
continue; |
||||||
|
|
||||||
|
if (!le32_to_cpu(entry->offset)) |
||||||
|
continue; |
||||||
|
|
||||||
|
if (!le32_to_cpu(entry->size)) |
||||||
|
continue; |
||||||
|
|
||||||
|
if (host0 == local_host) |
||||||
|
remote_host = host1; |
||||||
|
else |
||||||
|
remote_host = host0; |
||||||
|
|
||||||
|
if (remote_host >= SMEM_HOST_COUNT) { |
||||||
|
dev_err(smem->dev, |
||||||
|
"Invalid remote host %d\n", |
||||||
|
remote_host); |
||||||
|
return -EINVAL; |
||||||
|
} |
||||||
|
|
||||||
|
if (smem->partitions[remote_host]) { |
||||||
|
dev_err(smem->dev, |
||||||
|
"Already found a partition for host %d\n", |
||||||
|
remote_host); |
||||||
|
return -EINVAL; |
||||||
|
} |
||||||
|
|
||||||
|
header = smem->regions[0].virt_base + le32_to_cpu(entry->offset); |
||||||
|
host0 = le16_to_cpu(header->host0); |
||||||
|
host1 = le16_to_cpu(header->host1); |
||||||
|
|
||||||
|
if (memcmp(header->magic, SMEM_PART_MAGIC, |
||||||
|
sizeof(header->magic))) { |
||||||
|
dev_err(smem->dev, |
||||||
|
"Partition %d has invalid magic\n", i); |
||||||
|
return -EINVAL; |
||||||
|
} |
||||||
|
|
||||||
|
if (host0 != local_host && host1 != local_host) { |
||||||
|
dev_err(smem->dev, |
||||||
|
"Partition %d hosts are invalid\n", i); |
||||||
|
return -EINVAL; |
||||||
|
} |
||||||
|
|
||||||
|
if (host0 != remote_host && host1 != remote_host) { |
||||||
|
dev_err(smem->dev, |
||||||
|
"Partition %d hosts are invalid\n", i); |
||||||
|
return -EINVAL; |
||||||
|
} |
||||||
|
|
||||||
|
if (le32_to_cpu(header->size) != le32_to_cpu(entry->size)) { |
||||||
|
dev_err(smem->dev, |
||||||
|
"Partition %d has invalid size\n", i); |
||||||
|
return -EINVAL; |
||||||
|
} |
||||||
|
|
||||||
|
if (le32_to_cpu(header->offset_free_uncached) > le32_to_cpu(header->size)) { |
||||||
|
dev_err(smem->dev, |
||||||
|
"Partition %d has invalid free pointer\n", i); |
||||||
|
return -EINVAL; |
||||||
|
} |
||||||
|
|
||||||
|
smem->partitions[remote_host] = header; |
||||||
|
smem->cacheline[remote_host] = le32_to_cpu(entry->cacheline); |
||||||
|
} |
||||||
|
|
||||||
|
return 0; |
||||||
|
} |
||||||
|
|
||||||
|
static int qcom_smem_map_memory(struct qcom_smem *smem, struct udevice *dev, |
||||||
|
const char *name, int i) |
||||||
|
{ |
||||||
|
struct fdt_resource r; |
||||||
|
int ret; |
||||||
|
int node = dev_of_offset(dev); |
||||||
|
|
||||||
|
ret = fdtdec_lookup_phandle(gd->fdt_blob, node, name); |
||||||
|
if (ret < 0) { |
||||||
|
dev_err(dev, "No %s specified\n", name); |
||||||
|
return -EINVAL; |
||||||
|
} |
||||||
|
|
||||||
|
ret = fdt_get_resource(gd->fdt_blob, ret, "reg", 0, &r); |
||||||
|
if (ret) |
||||||
|
return ret; |
||||||
|
|
||||||
|
smem->regions[i].aux_base = (u32)r.start; |
||||||
|
smem->regions[i].size = fdt_resource_size(&r); |
||||||
|
smem->regions[i].virt_base = devm_ioremap(dev, r.start, fdt_resource_size(&r)); |
||||||
|
if (!smem->regions[i].virt_base) |
||||||
|
return -ENOMEM; |
||||||
|
|
||||||
|
return 0; |
||||||
|
} |
||||||
|
|
||||||
|
static int qcom_smem_probe(struct udevice *dev) |
||||||
|
{ |
||||||
|
struct smem_header *header; |
||||||
|
struct qcom_smem *smem; |
||||||
|
size_t array_size; |
||||||
|
int num_regions; |
||||||
|
u32 version; |
||||||
|
int ret; |
||||||
|
int node = dev_of_offset(dev); |
||||||
|
|
||||||
|
num_regions = 1; |
||||||
|
if (fdtdec_lookup_phandle(gd->fdt_blob, node, "qcomrpm-msg-ram") >= 0) |
||||||
|
num_regions++; |
||||||
|
|
||||||
|
array_size = num_regions * sizeof(struct smem_region); |
||||||
|
smem = devm_kzalloc(dev, sizeof(*smem) + array_size, GFP_KERNEL); |
||||||
|
if (!smem) |
||||||
|
return -ENOMEM; |
||||||
|
|
||||||
|
smem->dev = dev; |
||||||
|
smem->num_regions = num_regions; |
||||||
|
|
||||||
|
ret = qcom_smem_map_memory(smem, dev, "memory-region", 0); |
||||||
|
if (ret) |
||||||
|
return ret; |
||||||
|
|
||||||
|
if (num_regions > 1) { |
||||||
|
ret = qcom_smem_map_memory(smem, dev, |
||||||
|
"qcom,rpm-msg-ram", 1); |
||||||
|
if (ret) |
||||||
|
return ret; |
||||||
|
} |
||||||
|
|
||||||
|
header = smem->regions[0].virt_base; |
||||||
|
if (le32_to_cpu(header->initialized) != 1 || |
||||||
|
le32_to_cpu(header->reserved)) { |
||||||
|
dev_err(&pdev->dev, "SMEM is not initialized by SBL\n"); |
||||||
|
return -EINVAL; |
||||||
|
} |
||||||
|
|
||||||
|
version = qcom_smem_get_sbl_version(smem); |
||||||
|
switch (version >> 16) { |
||||||
|
case SMEM_GLOBAL_PART_VERSION: |
||||||
|
ret = qcom_smem_set_global_partition(smem); |
||||||
|
if (ret < 0) |
||||||
|
return ret; |
||||||
|
smem->item_count = qcom_smem_get_item_count(smem); |
||||||
|
break; |
||||||
|
case SMEM_GLOBAL_HEAP_VERSION: |
||||||
|
smem->item_count = SMEM_ITEM_COUNT; |
||||||
|
break; |
||||||
|
default: |
||||||
|
dev_err(dev, "Unsupported SMEM version 0x%x\n", version); |
||||||
|
return -EINVAL; |
||||||
|
} |
||||||
|
|
||||||
|
ret = qcom_smem_enumerate_partitions(smem, SMEM_HOST_APPS); |
||||||
|
if (ret < 0 && ret != -ENOENT) |
||||||
|
return ret; |
||||||
|
|
||||||
|
__smem = smem; |
||||||
|
|
||||||
|
return 0; |
||||||
|
} |
||||||
|
|
||||||
|
static int qcom_smem_remove(struct udevice *dev) |
||||||
|
{ |
||||||
|
__smem = NULL; |
||||||
|
|
||||||
|
return 0; |
||||||
|
} |
||||||
|
|
||||||
|
const struct udevice_id qcom_smem_of_match[] = { |
||||||
|
{ .compatible = "qcom,smem" }, |
||||||
|
{ } |
||||||
|
}; |
||||||
|
|
||||||
|
static const struct smem_ops msm_smem_ops = { |
||||||
|
.alloc = qcom_smem_alloc, |
||||||
|
.get = qcom_smem_get, |
||||||
|
.get_free_space = qcom_smem_get_free_space, |
||||||
|
}; |
||||||
|
|
||||||
|
U_BOOT_DRIVER(qcom_smem) = { |
||||||
|
.name = "qcom_smem", |
||||||
|
.id = UCLASS_SMEM, |
||||||
|
.of_match = qcom_smem_of_match, |
||||||
|
.ops = &msm_smem_ops, |
||||||
|
.probe = qcom_smem_probe, |
||||||
|
.remove = qcom_smem_remove, |
||||||
|
}; |
Loading…
Reference in new issue