15 #include <linux/soc/qcom/smem.h>
36  * (@smem_ptable), that is found 4kB from the end of the main smem region. The
53  * region with partition type (SMEM_GLOBAL_HOST) and the max smem item count is
63  * The version member of the smem header contains an array of versions for the
102  * struct smem_global_entry - entry to reference smem items on the heap
118  * struct smem_header - header found in beginning of primary smem region
121  * @initialized:	boolean to indicate that smem is initialized
122  * @free_offset:	index of the first unallocated byte in smem
202  * @item:	identifying number of the smem item
219  * struct smem_info - smem region info located after the table of contents
221  * @size:	size of the smem region
222  * @base_addr:	base address of the smem region
237  * struct smem_region - representation of a chunk of memory used for smem
249  * struct qcom_smem - device data for the smem device
343 /* Pointer to the one and only smem handle */
349 static int qcom_smem_alloc_private(struct qcom_smem *smem,  in qcom_smem_alloc_private()  argument
374 		dev_err(smem->dev, "Out of memory\n");  in qcom_smem_alloc_private()
394 	dev_err(smem->dev, "Found invalid canary in hosts %hu:%hu partition\n",  in qcom_smem_alloc_private()
400 static int qcom_smem_alloc_global(struct qcom_smem *smem,  in qcom_smem_alloc_global()  argument
407 	header = smem->regions[0].virt_base;  in qcom_smem_alloc_global()
434  * qcom_smem_alloc() - allocate space for a smem item
436  * @item:	smem item handle
439  * Allocate space for a given smem item of size @size, given that the item is
482 static void *qcom_smem_get_global(struct qcom_smem *smem,  in qcom_smem_get_global()  argument
492 	header = smem->regions[0].virt_base;  in qcom_smem_get_global()
499 	for (i = 0; i < smem->num_regions; i++) {  in qcom_smem_get_global()
500 		region = &smem->regions[i];  in qcom_smem_get_global()
512 static void *qcom_smem_get_private(struct qcom_smem *smem,  in qcom_smem_get_private()  argument
561 	dev_err(smem->dev, "Found invalid canary in hosts %hu:%hu partition\n",  in qcom_smem_get_private()
568  * qcom_smem_get() - resolve ptr of size of a smem item
570  * @item:	smem item handle
573  * Looks up smem item and returns pointer to it. Size of smem
619  * To be used by smem clients as a quick way to determine if any new
650  * with an smem item pointer (previously returned by qcom_smem_get()
653  * Returns 0 if the pointer provided is not within any smem region.
675 static int qcom_smem_get_sbl_version(struct qcom_smem *smem)  in qcom_smem_get_sbl_version()  argument
680 	header = smem->regions[0].virt_base;  in qcom_smem_get_sbl_version()
686 static struct smem_ptable *qcom_smem_get_ptable(struct qcom_smem *smem)  in qcom_smem_get_ptable()  argument
691 	ptable = smem->regions[0].virt_base + smem->regions[0].size - SZ_4K;  in qcom_smem_get_ptable()
697 		dev_err(smem->dev,  in qcom_smem_get_ptable()
704 static u32 qcom_smem_get_item_count(struct qcom_smem *smem)  in qcom_smem_get_item_count()  argument
709 	ptable = qcom_smem_get_ptable(smem);  in qcom_smem_get_item_count()
726 qcom_smem_partition_header(struct qcom_smem *smem,  in qcom_smem_partition_header()  argument
732 	header = smem->regions[0].virt_base + le32_to_cpu(entry->offset);  in qcom_smem_partition_header()
735 		dev_err(smem->dev, "bad partition magic %4ph\n", header->magic);  in qcom_smem_partition_header()
740 		dev_err(smem->dev, "bad host0 (%hu != %hu)\n",  in qcom_smem_partition_header()
745 		dev_err(smem->dev, "bad host1 (%hu != %hu)\n",  in qcom_smem_partition_header()
752 		dev_err(smem->dev, "bad partition size (%u != %u)\n",  in qcom_smem_partition_header()
758 		dev_err(smem->dev, "bad partition free uncached (%u > %u)\n",  in qcom_smem_partition_header()
766 static int qcom_smem_set_global_partition(struct qcom_smem *smem)  in qcom_smem_set_global_partition()  argument
774 	if (smem->global_partition) {  in qcom_smem_set_global_partition()
775 		dev_err(smem->dev, "Already found the global partition\n");  in qcom_smem_set_global_partition()
779 	ptable = qcom_smem_get_ptable(smem);  in qcom_smem_set_global_partition()
800 		dev_err(smem->dev, "Missing entry for global partition\n");  in qcom_smem_set_global_partition()
804 	header = qcom_smem_partition_header(smem, entry,  in qcom_smem_set_global_partition()
809 	smem->global_partition = header;  in qcom_smem_set_global_partition()
810 	smem->global_cacheline = le32_to_cpu(entry->cacheline);  in qcom_smem_set_global_partition()
816 qcom_smem_enumerate_partitions(struct qcom_smem *smem, u16 local_host)  in qcom_smem_enumerate_partitions()  argument
825 	ptable = qcom_smem_get_ptable(smem);  in qcom_smem_enumerate_partitions()
846 			dev_err(smem->dev, "bad host %hu\n", remote_host);  in qcom_smem_enumerate_partitions()
850 		if (smem->partitions[remote_host]) {  in qcom_smem_enumerate_partitions()
851 			dev_err(smem->dev, "duplicate host %hu\n", remote_host);  in qcom_smem_enumerate_partitions()
855 		header = qcom_smem_partition_header(smem, entry, host0, host1);  in qcom_smem_enumerate_partitions()
859 		smem->partitions[remote_host] = header;  in qcom_smem_enumerate_partitions()
860 		smem->cacheline[remote_host] = le32_to_cpu(entry->cacheline);  in qcom_smem_enumerate_partitions()
866 static int qcom_smem_map_memory(struct qcom_smem *smem, struct device *dev,  in qcom_smem_map_memory()  argument
886 	smem->regions[i].virt_base = devm_ioremap_wc(dev, r.start, size);  in qcom_smem_map_memory()
887 	if (!smem->regions[i].virt_base)  in qcom_smem_map_memory()
889 	smem->regions[i].aux_base = (u32)r.start;  in qcom_smem_map_memory()
890 	smem->regions[i].size = size;  in qcom_smem_map_memory()
898 	struct qcom_smem *smem;  in qcom_smem_probe()  local
910 	smem = devm_kzalloc(&pdev->dev, sizeof(*smem) + array_size, GFP_KERNEL);  in qcom_smem_probe()
911 	if (!smem)  in qcom_smem_probe()
914 	smem->dev = &pdev->dev;  in qcom_smem_probe()
915 	smem->num_regions = num_regions;  in qcom_smem_probe()
917 	ret = qcom_smem_map_memory(smem, &pdev->dev, "memory-region", 0);  in qcom_smem_probe()
921 	if (num_regions > 1 && (ret = qcom_smem_map_memory(smem, &pdev->dev,  in qcom_smem_probe()
925 	header = smem->regions[0].virt_base;  in qcom_smem_probe()
928 		dev_err(&pdev->dev, "SMEM is not initialized by SBL\n");  in qcom_smem_probe()
932 	version = qcom_smem_get_sbl_version(smem);  in qcom_smem_probe()
935 		ret = qcom_smem_set_global_partition(smem);  in qcom_smem_probe()
938 		smem->item_count = qcom_smem_get_item_count(smem);  in qcom_smem_probe()
941 		smem->item_count = SMEM_ITEM_COUNT;  in qcom_smem_probe()
944 		dev_err(&pdev->dev, "Unsupported SMEM version 0x%x\n", version);  in qcom_smem_probe()
949 	ret = qcom_smem_enumerate_partitions(smem, SMEM_HOST_APPS);  in qcom_smem_probe()
960 	smem->hwlock = hwspin_lock_request_specific(hwlock_id);  in qcom_smem_probe()
961 	if (!smem->hwlock)  in qcom_smem_probe()
964 	__smem = smem;  in qcom_smem_probe()
966 	smem->socinfo = platform_device_register_data(&pdev->dev, "qcom-socinfo",  in qcom_smem_probe()
969 	if (IS_ERR(smem->socinfo))  in qcom_smem_probe()
986 	{ .compatible = "qcom,smem" },
995 		.name = "qcom-smem",