gfxp_vm.c revision 843e19887f64dde75055cf8842fc4db2171eff45
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/debug.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/time.h>
#include <sys/buf.h>
#include <sys/errno.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/signal.h>
#include <sys/file.h>
#include <sys/uio.h>
#include <sys/ioctl.h>
#include <sys/map.h>
#include <sys/proc.h>
#include <sys/user.h>
#include <sys/mman.h>
#include <sys/cred.h>
#include <sys/open.h>
#include <sys/stat.h>
#include <sys/utsname.h>
#include <sys/kmem.h>
#include <sys/cmn_err.h>
#include <sys/vnode.h>
#include <vm/page.h>
#include <vm/as.h>
#include <vm/hat.h>
#include <vm/seg.h>
#include <vm/seg_kmem.h>
#include <vm/hat_i86.h>
#include <sys/vmsystm.h>
#include <sys/ddi.h>
#include <sys/devops.h>
#include <sys/sunddi.h>
#include <sys/ddi_impldefs.h>
#include <sys/fs/snode.h>
#include <sys/pci.h>
#include <sys/modctl.h>
#include <sys/uio.h>
#include <sys/visual_io.h>
#include <sys/fbio.h>
#include <sys/ddidmareq.h>
#include <sys/tnf_probe.h>
#include <sys/kstat.h>
#include <sys/callb.h>
#include <sys/promif.h>
#include <sys/atomic.h>
#include "gfx_private.h"
#ifdef __xpv
#include <sys/hypervisor.h>
#endif
/*
* Create a kva mapping for a pa (start..start+size) with
* the specified cache attributes (mode).
*/
gfxp_kva_t
gfxp_map_kernel_space(uint64_t start, size_t size, uint32_t mode)
{
uint_t pgoffset;
uint64_t base;
pgcnt_t npages;
caddr_t cvaddr;
int hat_flags;
uint_t hat_attr;
pfn_t pfn;
if (size == 0)
return (0);
#ifdef __xpv
/*
* The hypervisor doesn't allow r/w mappings to some pages, such as
* page tables, gdt, etc. Detect %cr3 to notify users of this interface.
*/
if (start == mmu_ptob(mmu_btop(getcr3())))
return (0);
#endif
if (mode == GFXP_MEMORY_CACHED)
hat_attr = HAT_STORECACHING_OK;
else if (mode == GFXP_MEMORY_WRITECOMBINED)
hat_attr = HAT_MERGING_OK | HAT_PLAT_NOCACHE;
else /* GFXP_MEMORY_UNCACHED */
hat_attr = HAT_STRICTORDER | HAT_PLAT_NOCACHE;
hat_flags = HAT_LOAD_LOCK;
pgoffset = start & PAGEOFFSET;
base = start - pgoffset;
npages = btopr(size + pgoffset);
cvaddr = vmem_alloc(heap_arena, ptob(npages), VM_NOSLEEP);
if (cvaddr == NULL)
return (NULL);
#ifdef __xpv
ASSERT(DOMAIN_IS_INITDOMAIN(xen_info));
pfn = xen_assign_pfn(mmu_btop(base));
#else
pfn = btop(base);
#endif
hat_devload(kas.a_hat, cvaddr, ptob(npages), pfn,
PROT_READ|PROT_WRITE|hat_attr, hat_flags);
return (cvaddr + pgoffset);
}
/*
* Destroy the mapping created by gfxp_map_kernel_space().
* Physical memory is not reclaimed.
*/
void
gfxp_unmap_kernel_space(gfxp_kva_t address, size_t size)
{
uint_t pgoffset;
caddr_t base;
pgcnt_t npages;
if (size == 0 || address == NULL)
return;
pgoffset = (uintptr_t)address & PAGEOFFSET;
base = (caddr_t)address - pgoffset;
npages = btopr(size + pgoffset);
hat_unload(kas.a_hat, base, ptob(npages), HAT_UNLOAD_UNLOCK);
vmem_free(heap_arena, base, ptob(npages));
}
/*
* For a VA return the pfn
*/
int
gfxp_va2pa(struct as *as, caddr_t addr, uint64_t *pa)
{
#ifdef __xpv
ASSERT(DOMAIN_IS_INITDOMAIN(xen_info));
*pa = pa_to_ma(pfn_to_pa(hat_getpfnum(as->a_hat, addr)));
#else
*pa = pfn_to_pa(hat_getpfnum(as->a_hat, addr));
#endif
return (0);
}
/*
* NOP now
*/
/* ARGSUSED */
void
gfxp_fix_mem_cache_attrs(caddr_t kva_start, size_t length, int cache_attr)
{
}
int
gfxp_ddi_dma_mem_alloc(ddi_dma_handle_t handle, size_t length,
ddi_device_acc_attr_t *accattrp, uint_t flags, int (*waitfp) (caddr_t),
caddr_t arg, caddr_t *kaddrp, size_t *real_length,
ddi_acc_handle_t *handlep)
{
uint_t l_flags = flags & ~IOMEM_DATA_MASK; /* clear cache attrs */
int e;
/*
* Set an appropriate attribute from devacc_attr_dataorder
* to keep compatibility. The cache attributes are igonred
* if specified.
*/
if (accattrp != NULL) {
if (accattrp->devacc_attr_dataorder == DDI_STRICTORDER_ACC) {
l_flags |= IOMEM_DATA_UNCACHED;
} else if (accattrp->devacc_attr_dataorder ==
DDI_MERGING_OK_ACC) {
l_flags |= IOMEM_DATA_UC_WR_COMBINE;
} else {
l_flags |= IOMEM_DATA_CACHED;
}
}
e = ddi_dma_mem_alloc(handle, length, accattrp, l_flags, waitfp,
arg, kaddrp, real_length, handlep);
return (e);
}
int
gfxp_mlock_user_memory(caddr_t address, size_t length)
{
struct as *as = ttoproc(curthread)->p_as;
int error = 0;
if (((uintptr_t)address & PAGEOFFSET) != 0 || length == 0)
return (set_errno(EINVAL));
if (valid_usr_range(address, length, 0, as, as->a_userlimit) !=
RANGE_OKAY)
return (set_errno(ENOMEM));
error = as_ctl(as, address, length, MC_LOCK, 0, 0, NULL, 0);
if (error)
(void) set_errno(error);
return (error);
}
int
gfxp_munlock_user_memory(caddr_t address, size_t length)
{
struct as *as = ttoproc(curthread)->p_as;
int error = 0;
if (((uintptr_t)address & PAGEOFFSET) != 0 || length == 0)
return (set_errno(EINVAL));
if (valid_usr_range(address, length, 0, as, as->a_userlimit) !=
RANGE_OKAY)
return (set_errno(ENOMEM));
error = as_ctl(as, address, length, MC_UNLOCK, 0, 0, NULL, 0);
if (error)
(void) set_errno(error);
return (error);
}
gfx_maddr_t
gfxp_convert_addr(paddr_t paddr)
{
#ifdef __xpv
ASSERT(DOMAIN_IS_INITDOMAIN(xen_info));
return (pfn_to_pa(xen_assign_pfn(btop(paddr))));
#else
return ((gfx_maddr_t)paddr);
#endif
}