16 #include <linux/soc/qcom/smem.h>
38  * (@smem_ptable), that is found 4kB from the end of the main smem region. The
55  * region with partition type (SMEM_GLOBAL_HOST) and the max smem item count is
65  * The version member of the smem header contains an array of versions for the
104  * struct smem_global_entry - entry to reference smem items on the heap
120  * struct smem_header - header found in beginning of primary smem region
123  * @initialized:	boolean to indicate that smem is initialized
124  * @free_offset:	index of the first unallocated byte in smem
200  * struct smem_partition - describes smem partition
218  * @item:	identifying number of the smem item
235  * struct smem_info - smem region info located after the table of contents
237  * @size:	size of the smem region
238  * @base_addr:	base address of the smem region
253  * struct smem_region - representation of a chunk of memory used for smem
265  * struct qcom_smem - device data for the smem device
356 /* Pointer to the one and only smem handle */
363  * qcom_smem_is_available() - Check if SMEM is available
365  * Return: true if SMEM is available, false otherwise.
373 static int qcom_smem_alloc_private(struct qcom_smem *smem,  in qcom_smem_alloc_private()  argument
409 		dev_err(smem->dev, "Out of memory\n");  in qcom_smem_alloc_private()
429 	dev_err(smem->dev, "Found invalid canary in hosts %hu:%hu partition\n",  in qcom_smem_alloc_private()
435 static int qcom_smem_alloc_global(struct qcom_smem *smem,  in qcom_smem_alloc_global()  argument
442 	header = smem->regions[0].virt_base;  in qcom_smem_alloc_global()
469  * qcom_smem_alloc() - allocate space for a smem item
471  * @item:	smem item handle
474  * Allocate space for a given smem item of size @size, given that the item is
517 static void *qcom_smem_get_global(struct qcom_smem *smem,  in qcom_smem_get_global()  argument
529 	header = smem->regions[0].virt_base;  in qcom_smem_get_global()
536 	for (i = 0; i < smem->num_regions; i++) {  in qcom_smem_get_global()
537 		region = &smem->regions[i];  in qcom_smem_get_global()
556 static void *qcom_smem_get_private(struct qcom_smem *smem,  in qcom_smem_get_private()  argument
640 	dev_err(smem->dev, "Found invalid canary in hosts %hu:%hu partition\n",  in qcom_smem_get_private()
647  * qcom_smem_get() - resolve ptr of size of a smem item
649  * @item:	smem item handle
652  * Looks up smem item and returns pointer to it. Size of smem
695  * To be used by smem clients as a quick way to determine if any new
743  * with an smem item pointer (previously returned by qcom_smem_get()
746  * Returns 0 if the pointer provided is not within any smem region.
809 static int qcom_smem_get_sbl_version(struct qcom_smem *smem)  in qcom_smem_get_sbl_version()  argument
814 	header = smem->regions[0].virt_base;  in qcom_smem_get_sbl_version()
820 static struct smem_ptable *qcom_smem_get_ptable(struct qcom_smem *smem)  in qcom_smem_get_ptable()  argument
825 	ptable = smem->ptable;  in qcom_smem_get_ptable()
831 		dev_err(smem->dev,  in qcom_smem_get_ptable()
838 static u32 qcom_smem_get_item_count(struct qcom_smem *smem)  in qcom_smem_get_item_count()  argument
843 	ptable = qcom_smem_get_ptable(smem);  in qcom_smem_get_item_count()
860 qcom_smem_partition_header(struct qcom_smem *smem,  in qcom_smem_partition_header()  argument
867 	phys_addr = smem->regions[0].aux_base + le32_to_cpu(entry->offset);  in qcom_smem_partition_header()
868 	header = devm_ioremap_wc(smem->dev, phys_addr, le32_to_cpu(entry->size));  in qcom_smem_partition_header()
874 		dev_err(smem->dev, "bad partition magic %4ph\n", header->magic);  in qcom_smem_partition_header()
879 		dev_err(smem->dev, "bad host0 (%hu != %hu)\n",  in qcom_smem_partition_header()
884 		dev_err(smem->dev, "bad host1 (%hu != %hu)\n",  in qcom_smem_partition_header()
891 		dev_err(smem->dev, "bad partition size (%u != %u)\n",  in qcom_smem_partition_header()
897 		dev_err(smem->dev, "bad partition free uncached (%u > %u)\n",  in qcom_smem_partition_header()
905 static int qcom_smem_set_global_partition(struct qcom_smem *smem)  in qcom_smem_set_global_partition()  argument
913 	if (smem->global_partition.virt_base) {  in qcom_smem_set_global_partition()
914 		dev_err(smem->dev, "Already found the global partition\n");  in qcom_smem_set_global_partition()
918 	ptable = qcom_smem_get_ptable(smem);  in qcom_smem_set_global_partition()
939 		dev_err(smem->dev, "Missing entry for global partition\n");  in qcom_smem_set_global_partition()
943 	header = qcom_smem_partition_header(smem, entry,  in qcom_smem_set_global_partition()
948 	smem->global_partition.virt_base = (void __iomem *)header;  in qcom_smem_set_global_partition()
949 	smem->global_partition.phys_base = smem->regions[0].aux_base +  in qcom_smem_set_global_partition()
951 	smem->global_partition.size = le32_to_cpu(entry->size);  in qcom_smem_set_global_partition()
952 	smem->global_partition.cacheline = le32_to_cpu(entry->cacheline);  in qcom_smem_set_global_partition()
958 qcom_smem_enumerate_partitions(struct qcom_smem *smem, u16 local_host)  in qcom_smem_enumerate_partitions()  argument
967 	ptable = qcom_smem_get_ptable(smem);  in qcom_smem_enumerate_partitions()
988 			dev_err(smem->dev, "bad host %u\n", remote_host);  in qcom_smem_enumerate_partitions()
992 		if (smem->partitions[remote_host].virt_base) {  in qcom_smem_enumerate_partitions()
993 			dev_err(smem->dev, "duplicate host %u\n", remote_host);  in qcom_smem_enumerate_partitions()
997 		header = qcom_smem_partition_header(smem, entry, host0, host1);  in qcom_smem_enumerate_partitions()
1001 		smem->partitions[remote_host].virt_base = (void __iomem *)header;  in qcom_smem_enumerate_partitions()
1002 		smem->partitions[remote_host].phys_base = smem->regions[0].aux_base +  in qcom_smem_enumerate_partitions()
1004 		smem->partitions[remote_host].size = le32_to_cpu(entry->size);  in qcom_smem_enumerate_partitions()
1005 		smem->partitions[remote_host].cacheline = le32_to_cpu(entry->cacheline);  in qcom_smem_enumerate_partitions()
1011 static int qcom_smem_map_toc(struct qcom_smem *smem, struct smem_region *region)  in qcom_smem_map_toc()  argument
1015 	/* map starting 4K for smem header */  in qcom_smem_map_toc()
1016 	region->virt_base = devm_ioremap_wc(smem->dev, region->aux_base, SZ_4K);  in qcom_smem_map_toc()
1019 	smem->ptable = devm_ioremap_wc(smem->dev, ptable_start, SZ_4K);  in qcom_smem_map_toc()
1021 	if (!region->virt_base || !smem->ptable)  in qcom_smem_map_toc()
1027 static int qcom_smem_map_global(struct qcom_smem *smem, u32 size)  in qcom_smem_map_global()  argument
1031 	phys_addr = smem->regions[0].aux_base;  in qcom_smem_map_global()
1033 	smem->regions[0].size = size;  in qcom_smem_map_global()
1034 	smem->regions[0].virt_base = devm_ioremap_wc(smem->dev, phys_addr, size);  in qcom_smem_map_global()
1036 	if (!smem->regions[0].virt_base)  in qcom_smem_map_global()
1042 static int qcom_smem_resolve_mem(struct qcom_smem *smem, const char *name,  in qcom_smem_resolve_mem()  argument
1045 	struct device *dev = smem->dev;  in qcom_smem_resolve_mem()
1071 	struct qcom_smem *smem;  in qcom_smem_probe()  local
1084 	smem = devm_kzalloc(&pdev->dev, struct_size(smem, regions, num_regions),  in qcom_smem_probe()
1086 	if (!smem)  in qcom_smem_probe()
1089 	smem->dev = &pdev->dev;  in qcom_smem_probe()
1090 	smem->num_regions = num_regions;  in qcom_smem_probe()
1094 		smem->regions[0].aux_base = rmem->base;  in qcom_smem_probe()
1095 		smem->regions[0].size = rmem->size;  in qcom_smem_probe()
1101 		ret = qcom_smem_resolve_mem(smem, "memory-region", &smem->regions[0]);  in qcom_smem_probe()
1107 		ret = qcom_smem_resolve_mem(smem, "qcom,rpm-msg-ram", &smem->regions[1]);  in qcom_smem_probe()
1113 	ret = qcom_smem_map_toc(smem, &smem->regions[0]);  in qcom_smem_probe()
1118 		smem->regions[i].virt_base = devm_ioremap_wc(&pdev->dev,  in qcom_smem_probe()
1119 							     smem->regions[i].aux_base,  in qcom_smem_probe()
1120 							     smem->regions[i].size);  in qcom_smem_probe()
1121 		if (!smem->regions[i].virt_base) {  in qcom_smem_probe()
1122 			dev_err(&pdev->dev, "failed to remap %pa\n", &smem->regions[i].aux_base);  in qcom_smem_probe()
1127 	header = smem->regions[0].virt_base;  in qcom_smem_probe()
1130 		dev_err(&pdev->dev, "SMEM is not initialized by SBL\n");  in qcom_smem_probe()
1141 	smem->hwlock = hwspin_lock_request_specific(hwlock_id);  in qcom_smem_probe()
1142 	if (!smem->hwlock)  in qcom_smem_probe()
1145 	ret = hwspin_lock_timeout_irqsave(smem->hwlock, HWSPINLOCK_TIMEOUT, &flags);  in qcom_smem_probe()
1149 	hwspin_unlock_irqrestore(smem->hwlock, &flags);  in qcom_smem_probe()
1151 	version = qcom_smem_get_sbl_version(smem);  in qcom_smem_probe()
1153 	 * smem header mapping is required only in heap version scheme, so unmap  in qcom_smem_probe()
1157 	devm_iounmap(smem->dev, smem->regions[0].virt_base);  in qcom_smem_probe()
1160 		ret = qcom_smem_set_global_partition(smem);  in qcom_smem_probe()
1163 		smem->item_count = qcom_smem_get_item_count(smem);  in qcom_smem_probe()
1166 		qcom_smem_map_global(smem, size);  in qcom_smem_probe()
1167 		smem->item_count = SMEM_ITEM_COUNT;  in qcom_smem_probe()
1170 		dev_err(&pdev->dev, "Unsupported SMEM version 0x%x\n", version);  in qcom_smem_probe()
1175 	ret = qcom_smem_enumerate_partitions(smem, SMEM_HOST_APPS);  in qcom_smem_probe()
1179 	__smem = smem;  in qcom_smem_probe()
1181 	smem->socinfo = platform_device_register_data(&pdev->dev, "qcom-socinfo",  in qcom_smem_probe()
1184 	if (IS_ERR(smem->socinfo))  in qcom_smem_probe()
1199 	{ .compatible = "qcom,smem" },
1208 		.name = "qcom-smem",