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 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 int pseries_update_drconf_memory(struct of_reconfig_data *pr) { struct of_drconf_cell *new_drmem, *old_drmem; unsigned long memblock_size; u32 entries; __be32 *p; int i, rc = -EINVAL; if (rtas_hp_event) return 0; memblock_size = pseries_memory_block_size(); if (!memblock_size) return -EINVAL; p = (__be32 *) pr->old_prop->value; if (!p) return -EINVAL; /* The first int of the property is the number of lmb's described * by the property. This is followed by an array of of_drconf_cell * entries. Get the number of entries and skip to the array of * of_drconf_cell's. */ entries = be32_to_cpu(*p++); old_drmem = (struct of_drconf_cell *)p; p = (__be32 *)pr->prop->value; p++; new_drmem = (struct of_drconf_cell *)p; for (i = 0; i < entries; i++) { if ((be32_to_cpu(old_drmem[i].flags) & DRCONF_MEM_ASSIGNED) && (!(be32_to_cpu(new_drmem[i].flags) & DRCONF_MEM_ASSIGNED))) { rc = pseries_remove_memblock( be64_to_cpu(old_drmem[i].base_addr), memblock_size); break; } else if ((!(be32_to_cpu(old_drmem[i].flags) & DRCONF_MEM_ASSIGNED)) && (be32_to_cpu(new_drmem[i].flags) & DRCONF_MEM_ASSIGNED)) { rc = memblock_add(be64_to_cpu(old_drmem[i].base_addr), memblock_size); rc = (rc < 0) ? -EINVAL : 0; break; } } return rc; }