On Fri, Jun 08, 2018 at 03:46:32PM +1000, Alexey Kardashevskiy wrote:
> This moves actual pages allocation to a separate function which is going
> to be reused later in on-demand TCE allocation.
>
> While we are at it, remove unnecessary level size round up as the caller
> does this already.
>
> Signed-off-by: Alexey Kardashevskiy <aik@xxxxxxxxx>
Reviewed-by: David Gibson <david@xxxxxxxxxxxxxxxxxxxxx>
> ---
> arch/powerpc/platforms/powernv/pci-ioda-tce.c | 30 +++++++++++++++++----------
> 1 file changed, 19 insertions(+), 11 deletions(-)
>
> diff --git a/arch/powerpc/platforms/powernv/pci-ioda-tce.c b/arch/powerpc/platforms/powernv/pci-ioda-tce.c
> index f14b282..36c2eb0 100644
> --- a/arch/powerpc/platforms/powernv/pci-ioda-tce.c
> +++ b/arch/powerpc/platforms/powernv/pci-ioda-tce.c
> @@ -31,6 +31,23 @@ void pnv_pci_setup_iommu_table(struct iommu_table *tbl,
> tbl->it_type = TCE_PCI;
> }
>
> +static __be64 *pnv_alloc_tce_level(int nid, unsigned int shift)
> +{
> + struct page *tce_mem = NULL;
> + __be64 *addr;
> +
> + tce_mem = alloc_pages_node(nid, GFP_KERNEL, shift - PAGE_SHIFT);
> + if (!tce_mem) {
> + pr_err("Failed to allocate a TCE memory, level shift=%d\n",
> + shift);
> + return NULL;
> + }
> + addr = page_address(tce_mem);
> + memset(addr, 0, 1UL << shift);
> +
> + return addr;
> +}
> +
> static __be64 *pnv_tce(struct iommu_table *tbl, bool user, long idx)
> {
> __be64 *tmp = user ? tbl->it_userspace : (__be64 *) tbl->it_base;
> @@ -165,21 +182,12 @@ static __be64 *pnv_pci_ioda2_table_do_alloc_pages(int nid, unsigned int shift,
> unsigned int levels, unsigned long limit,
> unsigned long *current_offset, unsigned long *total_allocated)
> {
> - struct page *tce_mem = NULL;
> __be64 *addr, *tmp;
> - unsigned int order = max_t(unsigned int, shift, PAGE_SHIFT) -
> - PAGE_SHIFT;
> - unsigned long allocated = 1UL << (order + PAGE_SHIFT);
> + unsigned long allocated = 1UL << shift;
> unsigned int entries = 1UL << (shift - 3);
> long i;
>
> - tce_mem = alloc_pages_node(nid, GFP_KERNEL, order);
> - if (!tce_mem) {
> - pr_err("Failed to allocate a TCE memory, order=%d\n", order);
> - return NULL;
> - }
> - addr = page_address(tce_mem);
> - memset(addr, 0, allocated);
> + addr = pnv_alloc_tce_level(nid, shift);
> *total_allocated += allocated;
>
> --levels;
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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