static int pseries_remove_memblock(unsigned long base, unsigned int memblock_size) { unsigned long block_sz, start_pfn; int sections_per_block; int i, nid; start_pfn = base >> PAGE_SHIFT; lock_device_hotplug(); if (!pfn_valid(start_pfn)) goto out; block_sz = pseries_memory_block_size(); sections_per_block = block_sz / MIN_MEMORY_BLOCK_SIZE; nid = memory_add_physaddr_to_nid(base); for (i = 0; i < sections_per_block; i++) { remove_memory(nid, base, MIN_MEMORY_BLOCK_SIZE); base += MIN_MEMORY_BLOCK_SIZE; } out: /* Update memory regions for memory remove */ memblock_remove(base, memblock_size); unlock_device_hotplug(); return 0; }
static ssize_t memory_probe_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { u64 phys_addr; int nid, ret; unsigned long pages_per_block = PAGES_PER_SECTION * sections_per_block; ret = kstrtoull(buf, 0, &phys_addr); if (ret) return ret; if (phys_addr & ((pages_per_block << PAGE_SHIFT) - 1)) return -EINVAL; nid = memory_add_physaddr_to_nid(phys_addr); ret = add_memory(nid, phys_addr, MIN_MEMORY_BLOCK_SIZE * sections_per_block); if (ret) goto out; ret = count; out: return ret; }
static int dlpar_remove_lmb(struct of_drconf_cell *lmb) { struct memory_block *mem_block; unsigned long block_sz; int nid, rc; if (!lmb_is_removable(lmb)) return -EINVAL; mem_block = lmb_to_memblock(lmb); if (!mem_block) return -EINVAL; rc = device_offline(&mem_block->dev); put_device(&mem_block->dev); if (rc) return rc; block_sz = pseries_memory_block_size(); nid = memory_add_physaddr_to_nid(lmb->base_addr); remove_memory(nid, lmb->base_addr, block_sz); /* Update memory regions for memory remove */ memblock_remove(lmb->base_addr, block_sz); dlpar_remove_device_tree_lmb(lmb); return 0; }
static ssize_t memory_probe_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { u64 phys_addr; int nid; int i, ret; unsigned long pages_per_block = PAGES_PER_SECTION * sections_per_block; phys_addr = simple_strtoull(buf, NULL, 0); if (phys_addr & ((pages_per_block << PAGE_SHIFT) - 1)) return -EINVAL; for (i = 0; i < sections_per_block; i++) { nid = memory_add_physaddr_to_nid(phys_addr); ret = add_memory(nid, phys_addr, PAGES_PER_SECTION << PAGE_SHIFT); if (ret) goto out; phys_addr += MIN_MEMORY_BLOCK_SIZE; } ret = count; out: return ret; }
static int dlpar_add_lmb_memory(struct of_drconf_cell *lmb) { struct memory_block *mem_block; unsigned long block_sz; int nid, rc; block_sz = memory_block_size_bytes(); /* Find the node id for this address */ nid = memory_add_physaddr_to_nid(lmb->base_addr); /* Add the memory */ rc = add_memory(nid, lmb->base_addr, block_sz); if (rc) return rc; /* Register this block of memory */ rc = memblock_add(lmb->base_addr, block_sz); if (rc) { remove_memory(nid, lmb->base_addr, block_sz); return rc; } mem_block = lmb_to_memblock(lmb); if (!mem_block) { remove_memory(nid, lmb->base_addr, block_sz); return -EINVAL; } rc = device_online(&mem_block->dev); put_device(&mem_block->dev); if (rc) { remove_memory(nid, lmb->base_addr, block_sz); return rc; } lmb->flags |= DRCONF_MEM_ASSIGNED; return 0; }
static int dlpar_add_lmb(struct of_drconf_cell *lmb) { unsigned long block_sz; int nid, rc; if (lmb->flags & DRCONF_MEM_ASSIGNED) return -EINVAL; rc = dlpar_add_device_tree_lmb(lmb); if (rc) { pr_err("Couldn't update device tree for drc index %x\n", lmb->drc_index); dlpar_release_drc(lmb->drc_index); return rc; } block_sz = memory_block_size_bytes(); /* Find the node id for this address */ nid = memory_add_physaddr_to_nid(lmb->base_addr); /* Add the memory */ rc = add_memory(nid, lmb->base_addr, block_sz); if (rc) { dlpar_remove_device_tree_lmb(lmb); return rc; } rc = dlpar_online_lmb(lmb); if (rc) { remove_memory(nid, lmb->base_addr, block_sz); dlpar_remove_device_tree_lmb(lmb); } else { lmb->flags |= DRCONF_MEM_ASSIGNED; } return rc; }
static int e820_range_to_nid(resource_size_t addr) { return memory_add_physaddr_to_nid(addr); }