powerpc/iommu: Add it_page_shift field to determine iommu page size
This patch adds a it_page_shift field to struct iommu_table and initiliases it to 4K for all platforms. Signed-off-by: Alistair Popple <alistair@popple.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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@ -76,6 +76,7 @@ struct iommu_table {
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struct iommu_pool large_pool;
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struct iommu_pool pools[IOMMU_NR_POOLS];
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unsigned long *it_map; /* A simple allocation bitmap for now */
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unsigned long it_page_shift;/* table iommu page size */
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#ifdef CONFIG_IOMMU_API
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struct iommu_group *it_group;
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#endif
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@ -1177,9 +1177,10 @@ static struct iommu_table *vio_build_iommu_table(struct vio_dev *dev)
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&tbl->it_index, &offset, &size);
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/* TCE table size - measured in tce entries */
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tbl->it_size = size >> IOMMU_PAGE_SHIFT_4K;
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tbl->it_page_shift = IOMMU_PAGE_SHIFT_4K;
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tbl->it_size = size >> tbl->it_page_shift;
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/* offset for VIO should always be 0 */
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tbl->it_offset = offset >> IOMMU_PAGE_SHIFT_4K;
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tbl->it_offset = offset >> tbl->it_page_shift;
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tbl->it_busno = 0;
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tbl->it_type = TCE_VB;
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tbl->it_blocksize = 16;
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@ -197,7 +197,7 @@ static int tce_build_cell(struct iommu_table *tbl, long index, long npages,
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io_pte = (unsigned long *)tbl->it_base + (index - tbl->it_offset);
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for (i = 0; i < npages; i++, uaddr += IOMMU_PAGE_SIZE_4K)
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for (i = 0; i < npages; i++, uaddr += tbl->it_page_shift)
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io_pte[i] = base_pte | (__pa(uaddr) & CBE_IOPTE_RPN_Mask);
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mb();
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@ -487,8 +487,10 @@ cell_iommu_setup_window(struct cbe_iommu *iommu, struct device_node *np,
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window->table.it_blocksize = 16;
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window->table.it_base = (unsigned long)iommu->ptab;
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window->table.it_index = iommu->nid;
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window->table.it_offset = (offset >> IOMMU_PAGE_SHIFT_4K) + pte_offset;
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window->table.it_size = size >> IOMMU_PAGE_SHIFT_4K;
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window->table.it_page_shift = IOMMU_PAGE_SHIFT_4K;
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window->table.it_offset =
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(offset >> window->table.it_page_shift) + pte_offset;
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window->table.it_size = size >> window->table.it_page_shift;
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iommu_init_table(&window->table, iommu->nid);
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@ -138,8 +138,11 @@ static void iommu_table_iobmap_setup(void)
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pr_debug(" -> %s\n", __func__);
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iommu_table_iobmap.it_busno = 0;
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iommu_table_iobmap.it_offset = 0;
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iommu_table_iobmap.it_page_shift = IOBMAP_PAGE_SHIFT;
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/* it_size is in number of entries */
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iommu_table_iobmap.it_size = 0x80000000 >> IOBMAP_PAGE_SHIFT;
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iommu_table_iobmap.it_size =
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0x80000000 >> iommu_table_iobmap.it_page_shift;
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/* Initialize the common IOMMU code */
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iommu_table_iobmap.it_base = (unsigned long)iob_l2_base;
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@ -564,7 +564,8 @@ void pnv_pci_setup_iommu_table(struct iommu_table *tbl,
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{
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tbl->it_blocksize = 16;
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tbl->it_base = (unsigned long)tce_mem;
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tbl->it_offset = dma_offset >> IOMMU_PAGE_SHIFT_4K;
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tbl->it_page_shift = IOMMU_PAGE_SHIFT_4K;
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tbl->it_offset = dma_offset >> tbl->it_page_shift;
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tbl->it_index = 0;
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tbl->it_size = tce_size >> 3;
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tbl->it_busno = 0;
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@ -486,9 +486,10 @@ static void iommu_table_setparms(struct pci_controller *phb,
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memset((void *)tbl->it_base, 0, *sizep);
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tbl->it_busno = phb->bus->number;
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tbl->it_page_shift = IOMMU_PAGE_SHIFT_4K;
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/* Units of tce entries */
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tbl->it_offset = phb->dma_window_base_cur >> IOMMU_PAGE_SHIFT_4K;
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tbl->it_offset = phb->dma_window_base_cur >> tbl->it_page_shift;
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/* Test if we are going over 2GB of DMA space */
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if (phb->dma_window_base_cur + phb->dma_window_size > 0x80000000ul) {
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@ -499,7 +500,7 @@ static void iommu_table_setparms(struct pci_controller *phb,
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phb->dma_window_base_cur += phb->dma_window_size;
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/* Set the tce table size - measured in entries */
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tbl->it_size = phb->dma_window_size >> IOMMU_PAGE_SHIFT_4K;
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tbl->it_size = phb->dma_window_size >> tbl->it_page_shift;
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tbl->it_index = 0;
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tbl->it_blocksize = 16;
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@ -537,11 +538,12 @@ static void iommu_table_setparms_lpar(struct pci_controller *phb,
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of_parse_dma_window(dn, dma_window, &tbl->it_index, &offset, &size);
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tbl->it_busno = phb->bus->number;
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tbl->it_page_shift = IOMMU_PAGE_SHIFT_4K;
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tbl->it_base = 0;
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tbl->it_blocksize = 16;
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tbl->it_type = TCE_PCI;
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tbl->it_offset = offset >> IOMMU_PAGE_SHIFT_4K;
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tbl->it_size = size >> IOMMU_PAGE_SHIFT_4K;
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tbl->it_offset = offset >> tbl->it_page_shift;
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tbl->it_size = size >> tbl->it_page_shift;
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}
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static void pci_dma_bus_setup_pSeries(struct pci_bus *bus)
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@ -381,8 +381,9 @@ static struct wsp_dma_table *wsp_pci_create_dma32_table(struct wsp_phb *phb,
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/* Init bits and pieces */
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tbl->table.it_blocksize = 16;
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tbl->table.it_offset = addr >> IOMMU_PAGE_SHIFT_4K;
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tbl->table.it_size = size >> IOMMU_PAGE_SHIFT_4K;
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tbl->table.it_page_shift = IOMMU_PAGE_SHIFT_4K;
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tbl->table.it_offset = addr >> tbl->table.it_page_shift;
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tbl->table.it_size = size >> tbl->table.it_page_shift;
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/*
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* It's already blank but we clear it anyway.
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