px_fdvma.c revision ef2504f26d1ea5859db9838255bb63f488f1b050
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson * CDDL HEADER START
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson * The contents of this file are subject to the terms of the
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson * Common Development and Distribution License (the "License").
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson * You may not use this file except in compliance with the License.
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson * See the License for the specific language governing permissions
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson * and limitations under the License.
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson * When distributing Covered Code, include this CDDL HEADER in each
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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b00044a2eb43864b8718585d21949611a2ee59efJames Carlson * information: Portions Copyright [yyyy] [name of copyright owner]
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b00044a2eb43864b8718585d21949611a2ee59efJames Carlson * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson * Use is subject to license terms.
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson * Internal PCI Fast DVMA implementation
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson/*LINTLIBRARY*/
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson * The following routines are used to implement the sun4u fast dvma
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson * routines on this bus.
b00044a2eb43864b8718585d21949611a2ee59efJames Carlsonpx_fdvma_load(ddi_dma_handle_t h, caddr_t a, uint_t len, uint_t index,
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson offset = (uint32_t)(uintptr_t)a & MMU_PAGE_OFFSET;
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson /* make sure we don't exceed reserved boundary */
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson DBG(DBG_FAST_DVMA, dip, "load index=%x: %p+%x ", index, a, len);
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson cmn_err(px_panic_on_fatal_errors ? CE_PANIC : CE_WARN,
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson "%s%d: kaddr_load index(%x)+pgs(%lx) exceeds limit\n",
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson dvma_addr = mp->dmai_mapping + MMU_PTOB(index);
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson /* construct the dma cookie to be returned */
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson DBG(DBG_FAST_DVMA | DBG_CONT, dip, "cookie: %x+%x\n",
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson attr = PX_GET_TTE_ATTR(mp->dmai_rflags, mp->dmai_attr.dma_attr_flags);
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson if (px_lib_iommu_map(dip, PCI_TSBID(0, pg_index), npages,
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson PX_ADD_ATTR_EXTNS(attr, mp->dmai_bdf), (void *)a, 0,
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson cmn_err(CE_WARN, "%s%d: kaddr_load can't get "
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson "page frame for vaddr %lx", ddi_driver_name(dip),
b00044a2eb43864b8718585d21949611a2ee59efJames Carlsonpx_fdvma_unload(ddi_dma_handle_t h, uint_t index, uint_t sync_flag)
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson px_dvma_addr_t dvma_pg = MMU_BTOP(mp->dmai_mapping + MMU_PTOB(index));
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson "unload index=%x sync_flag=%x %x+%x+%x\n", index, sync_flag,
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson mp->dmai_mapping, MMU_PTOB(index), MMU_PTOB(npages));
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson px_mmu_unmap_pages(px_p->px_mmu_p, mp, dvma_pg, npages);
b00044a2eb43864b8718585d21949611a2ee59efJames Carlsonpx_fdvma_sync(ddi_dma_handle_t h, uint_t index, uint_t sync_flag)
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson "sync index=%x sync_flag=%x %x+%x+%x\n", index, sync_flag,
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson mp->dmai_mapping, MMU_PTOB(index), MMU_PTOB(npg));
b00044a2eb43864b8718585d21949611a2ee59efJames Carlsonpx_fdvma_reserve(dev_info_t *dip, dev_info_t *rdip, px_t *px_p,
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson ddi_dma_req_t *dmareq, ddi_dma_handle_t *handlep)
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson size_t counter_max = (lim_p->dlim_cntr_max + 1) & MMU_PAGE_MASK;
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson DBG(DBG_DMA_CTL, dip, "DDI_DMA_RESERVE: rdip=%s%d\n",
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson ddi_driver_name(rdip), ddi_get_instance(rdip));
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson * Check the limit structure.
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson if ((lo >= hi) || (hi < mmu_p->mmu_dvma_base))
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson * Check the size of the request.
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson * Allocate the dma handle.
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson mp = kmem_zalloc(sizeof (px_dma_hdl_t), KM_SLEEP);
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson * Get entries from dvma space map.
b00044a2eb43864b8718585d21949611a2ee59efJames Carlson * (vmem_t *vmp,
if (dvma_pg == 0) {
return (DDI_DMA_NOMAPPING);
return (DDI_SUCCESS);
if (px_disable_fdvma)
return (DDI_FAILURE);
return (DDI_FAILURE);
if (px_kmem_clid != 0) {
return (DDI_SUCCESS);