16 #include <smem.h>
39  * (@smem_ptable), that is found 4kB from the end of the main smem region. The
56  * region with partition type (SMEM_GLOBAL_HOST) and the max smem item count is
62  * The version member of the smem header contains an array of versions for the
101  * struct smem_global_entry - entry to reference smem items on the heap
117  * struct smem_header - header found in beginning of primary smem region
120  * @initialized:	boolean to indicate that smem is initialized
121  * @free_offset:	index of the first unallocated byte in smem
201  * @item:	identifying number of the smem item
218  * struct smem_info - smem region info located after the table of contents
220  * @size:	size of the smem region
221  * @base_addr:	base address of the smem region
236  * struct smem_region - representation of a chunk of memory used for smem
248  * struct qcom_smem - device data for the smem device
334 /* Pointer to the one and only smem handle */
337 static int qcom_smem_alloc_private(struct qcom_smem *smem,  in qcom_smem_alloc_private()  argument
352 			dev_err(smem->dev,  in qcom_smem_alloc_private()
367 		dev_err(smem->dev, "Out of memory\n");  in qcom_smem_alloc_private()
388 static int qcom_smem_alloc_global(struct qcom_smem *smem,  in qcom_smem_alloc_global()  argument
395 	header = smem->regions[0].virt_base;  in qcom_smem_alloc_global()
422  * qcom_smem_alloc() - allocate space for a smem item
424  * @item:	smem item handle
427  * Allocate space for a given smem item of size @size, given that the item is
460 static void *qcom_smem_get_global(struct qcom_smem *smem,  in qcom_smem_get_global()  argument
470 	header = smem->regions[0].virt_base;  in qcom_smem_get_global()
477 	for (i = 0; i < smem->num_regions; i++) {  in qcom_smem_get_global()
478 		area = &smem->regions[i];  in qcom_smem_get_global()
490 static void *qcom_smem_get_private(struct qcom_smem *smem,  in qcom_smem_get_private()  argument
539 	dev_err(smem->dev, "Found invalid canary in hosts %d:%d partition\n",  in qcom_smem_get_private()
546  * qcom_smem_get() - resolve ptr of size of a smem item
548  * @item:	smem item handle
551  * Looks up smem item and returns pointer to it. Size of smem
586  * To be used by smem clients as a quick way to determine if any new
614 static int qcom_smem_get_sbl_version(struct qcom_smem *smem)  in qcom_smem_get_sbl_version()  argument
619 	header = smem->regions[0].virt_base;  in qcom_smem_get_sbl_version()
625 static struct smem_ptable *qcom_smem_get_ptable(struct qcom_smem *smem)  in qcom_smem_get_ptable()  argument
630 	ptable = smem->regions[0].virt_base + smem->regions[0].size - SZ_4K;  in qcom_smem_get_ptable()
636 		dev_err(smem->dev,  in qcom_smem_get_ptable()
643 static u32 qcom_smem_get_item_count(struct qcom_smem *smem)  in qcom_smem_get_item_count()  argument
648 	ptable = qcom_smem_get_ptable(smem);  in qcom_smem_get_item_count()
659 static int qcom_smem_set_global_partition(struct qcom_smem *smem)  in qcom_smem_set_global_partition()  argument
667 	ptable = qcom_smem_get_ptable(smem);  in qcom_smem_set_global_partition()
681 		dev_err(smem->dev, "Missing entry for global partition\n");  in qcom_smem_set_global_partition()
686 		dev_err(smem->dev, "Invalid entry for global partition\n");  in qcom_smem_set_global_partition()
690 	if (smem->global_partition) {  in qcom_smem_set_global_partition()
691 		dev_err(smem->dev, "Already found the global partition\n");  in qcom_smem_set_global_partition()
695 	header = smem->regions[0].virt_base + le32_to_cpu(entry->offset);  in qcom_smem_set_global_partition()
700 		dev_err(smem->dev, "Global partition has invalid magic\n");  in qcom_smem_set_global_partition()
705 		dev_err(smem->dev, "Global partition hosts are invalid\n");  in qcom_smem_set_global_partition()
710 		dev_err(smem->dev, "Global partition has invalid size\n");  in qcom_smem_set_global_partition()
716 		dev_err(smem->dev,  in qcom_smem_set_global_partition()
721 	smem->global_partition = header;  in qcom_smem_set_global_partition()
722 	smem->global_cacheline = le32_to_cpu(entry->cacheline);  in qcom_smem_set_global_partition()
727 static int qcom_smem_enumerate_partitions(struct qcom_smem *smem,  in qcom_smem_enumerate_partitions()  argument
737 	ptable = qcom_smem_get_ptable(smem);  in qcom_smem_enumerate_partitions()
761 			dev_err(smem->dev,  in qcom_smem_enumerate_partitions()
767 		if (smem->partitions[remote_host]) {  in qcom_smem_enumerate_partitions()
768 			dev_err(smem->dev,  in qcom_smem_enumerate_partitions()
774 		header = smem->regions[0].virt_base + le32_to_cpu(entry->offset);  in qcom_smem_enumerate_partitions()
780 			dev_err(smem->dev,  in qcom_smem_enumerate_partitions()
786 			dev_err(smem->dev,  in qcom_smem_enumerate_partitions()
792 			dev_err(smem->dev,  in qcom_smem_enumerate_partitions()
798 			dev_err(smem->dev,  in qcom_smem_enumerate_partitions()
804 			dev_err(smem->dev,  in qcom_smem_enumerate_partitions()
809 		smem->partitions[remote_host] = header;  in qcom_smem_enumerate_partitions()
810 		smem->cacheline[remote_host] = le32_to_cpu(entry->cacheline);  in qcom_smem_enumerate_partitions()
816 static int qcom_smem_map_memory(struct qcom_smem *smem, struct udevice *dev,  in qcom_smem_map_memory()  argument
833 	smem->regions[i].aux_base = (u32)r.start;  in qcom_smem_map_memory()
834 	smem->regions[i].size = fdt_resource_size(&r);  in qcom_smem_map_memory()
835 	smem->regions[i].virt_base = devm_ioremap(dev, r.start, fdt_resource_size(&r));  in qcom_smem_map_memory()
836 	if (!smem->regions[i].virt_base)  in qcom_smem_map_memory()
845 	struct qcom_smem *smem;  in qcom_smem_probe()  local
857 	smem = devm_kzalloc(dev, sizeof(*smem) + array_size, GFP_KERNEL);  in qcom_smem_probe()
858 	if (!smem)  in qcom_smem_probe()
861 	smem->dev = dev;  in qcom_smem_probe()
862 	smem->num_regions = num_regions;  in qcom_smem_probe()
864 	ret = qcom_smem_map_memory(smem, dev, "memory-region", 0);  in qcom_smem_probe()
869 		ret = qcom_smem_map_memory(smem, dev,  in qcom_smem_probe()
875 	header = smem->regions[0].virt_base;  in qcom_smem_probe()
878 		dev_err(&pdev->dev, "SMEM is not initialized by SBL\n");  in qcom_smem_probe()
882 	version = qcom_smem_get_sbl_version(smem);  in qcom_smem_probe()
885 		ret = qcom_smem_set_global_partition(smem);  in qcom_smem_probe()
888 		smem->item_count = qcom_smem_get_item_count(smem);  in qcom_smem_probe()
891 		smem->item_count = SMEM_ITEM_COUNT;  in qcom_smem_probe()
894 		dev_err(dev, "Unsupported SMEM version 0x%x\n", version);  in qcom_smem_probe()
898 	ret = qcom_smem_enumerate_partitions(smem, SMEM_HOST_APPS);  in qcom_smem_probe()
902 	__smem = smem;  in qcom_smem_probe()
915 	{ .compatible = "qcom,smem" },