diff options
Diffstat (limited to 'arch/powerpc/platforms/pseries/iommu.c')
| -rw-r--r-- | arch/powerpc/platforms/pseries/iommu.c | 33 |
1 files changed, 32 insertions, 1 deletions
diff --git a/arch/powerpc/platforms/pseries/iommu.c b/arch/powerpc/platforms/pseries/iommu.c index 06f02960b439..cbcc8ceddd87 100644 --- a/arch/powerpc/platforms/pseries/iommu.c +++ b/arch/powerpc/platforms/pseries/iommu.c @@ -964,6 +964,37 @@ struct failed_ddw_pdn { static LIST_HEAD(failed_ddw_pdn_list); +static phys_addr_t ddw_memory_hotplug_max(void) +{ + phys_addr_t max_addr = memory_hotplug_max(); + struct device_node *memory; + + for_each_node_by_type(memory, "memory") { + unsigned long start, size; + int ranges, n_mem_addr_cells, n_mem_size_cells, len; + const __be32 *memcell_buf; + + memcell_buf = of_get_property(memory, "reg", &len); + if (!memcell_buf || len <= 0) + continue; + + n_mem_addr_cells = of_n_addr_cells(memory); + n_mem_size_cells = of_n_size_cells(memory); + + /* ranges in cell */ + ranges = (len >> 2) / (n_mem_addr_cells + n_mem_size_cells); + + start = of_read_number(memcell_buf, n_mem_addr_cells); + memcell_buf += n_mem_addr_cells; + size = of_read_number(memcell_buf, n_mem_size_cells); + memcell_buf += n_mem_size_cells; + + max_addr = max_t(phys_addr_t, max_addr, start + size); + } + + return max_addr; +} + /* * If the PE supports dynamic dma windows, and there is space for a table * that can map all pages in a linear offset, then setup such a table, @@ -1053,7 +1084,7 @@ static u64 enable_ddw(struct pci_dev *dev, struct device_node *pdn) } /* verify the window * number of ptes will map the partition */ /* check largest block * page size > max memory hotplug addr */ - max_addr = memory_hotplug_max(); + max_addr = ddw_memory_hotplug_max(); if (query.largest_available_block < (max_addr >> page_shift)) { dev_dbg(&dev->dev, "can't map partition max 0x%llx with %u " "%llu-sized pages\n", max_addr, query.largest_available_block, |