drm_memory.c revision 1450
98N/A/*
98N/A * Copyright (c) 2006, 2011, Oracle and/or its affiliates. All rights reserved.
287N/A */
98N/A
98N/A/*
98N/A * drm_memory.h -- Memory management wrappers for DRM -*- linux-c -*-
98N/A * Created: Thu Feb 4 14:00:34 1999 by faith@valinux.com
98N/A */
98N/A/*
98N/A * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
98N/A * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
98N/A * All Rights Reserved.
98N/A *
98N/A * Permission is hereby granted, free of charge, to any person obtaining a
98N/A * copy of this software and associated documentation files (the "Software"),
98N/A * to deal in the Software without restriction, including without limitation
98N/A * the rights to use, copy, modify, merge, publish, distribute, sublicense,
98N/A * and/or sell copies of the Software, and to permit persons to whom the
98N/A * Software is furnished to do so, subject to the following conditions:
98N/A *
98N/A * The above copyright notice and this permission notice (including the next
98N/A * paragraph) shall be included in all copies or substantial portions of the
98N/A * Software.
98N/A *
98N/A * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
98N/A * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
98N/A * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
98N/A * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
98N/A * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
98N/A * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
425N/A * OTHER DEALINGS IN THE SOFTWARE.
98N/A *
98N/A * Authors:
98N/A * Rickard E. (Rik) Faith <faith@valinux.com>
354N/A * Gareth Hughes <gareth@valinux.com>
354N/A *
354N/A */
354N/A
354N/A#include "drmP.h"
354N/A
354N/A/* Device memory access structure */
354N/Atypedef struct drm_device_iomap {
354N/A uint_t physical; /* physical address */
354N/A uint_t size; /* size of mapping */
354N/A uint_t drm_regnum; /* register number */
354N/A caddr_t drm_base; /* kernel virtual address */
98N/A ddi_acc_handle_t drm_handle; /* data access handle */
98N/A} drm_device_iomap_t;
98N/A
98N/Avoid *
98N/Adrm_alloc(size_t size, int area)
98N/A{
341N/A _NOTE(ARGUNUSED(area))
366N/A
354N/A return (kmem_zalloc(1 * size, KM_SLEEP));
425N/A}
325N/A
325N/Avoid *
354N/Adrm_calloc(size_t nmemb, size_t size, int area)
278N/A{
98N/A _NOTE(ARGUNUSED(area))
98N/A
98N/A return (kmem_zalloc(size * nmemb, KM_SLEEP));
151N/A}
137N/A
153N/Avoid *
210N/Adrm_realloc(void *oldpt, size_t oldsize, size_t size, int area)
366N/A{
98N/A _NOTE(ARGUNUSED(area))
179N/A
269N/A void *pt;
126N/A
98N/A pt = kmem_zalloc(1 * size, KM_NOSLEEP);
98N/A if (pt == NULL) {
98N/A DRM_ERROR("pt is NULL strange");
287N/A return (NULL);
366N/A }
123N/A if (oldpt && oldsize) {
98N/A bcopy(oldpt, pt, min(oldsize, size));
98N/A kmem_free(oldpt, oldsize);
98N/A }
98N/A return (pt);
98N/A}
98N/A
98N/Avoid
98N/Adrm_free(void *pt, size_t size, int area)
98N/A{
98N/A _NOTE(ARGUNUSED(area))
98N/A
98N/A kmem_free(pt, size);
156N/A}
156N/A
98N/Aint
98N/Adrm_get_pci_index_reg(dev_info_t *devi, uint_t physical, uint_t size,
98N/A off_t *off)
98N/A{
98N/A _NOTE(ARGUNUSED(size))
98N/A
98N/A int length;
98N/A pci_regspec_t *regs;
98N/A int n_reg, i;
98N/A int regnum;
98N/A uint_t base, regsize;
98N/A
98N/A regnum = -1;
98N/A
98N/A if (ddi_dev_nregs(devi, &n_reg) == DDI_FAILURE) {
380N/A DRM_ERROR("drm_get_pci_index_reg:ddi_dev_nregs failed\n");
380N/A n_reg = 0;
380N/A return (-1);
98N/A }
98N/A
98N/A if (ddi_getlongprop(DDI_DEV_T_ANY, devi, DDI_PROP_DONTPASS,
98N/A "assigned-addresses", (caddr_t)&regs, &length) !=
98N/A DDI_PROP_SUCCESS) {
98N/A DRM_ERROR("drm_get_pci_index_reg: ddi_getlongprop failed!\n");
98N/A goto error;
}
for (i = 0; i < n_reg; i ++) {
base = (uint_t)regs[i].pci_phys_low;
regsize = (uint_t)regs[i].pci_size_low;
if ((uint_t)physical >= base &&
(uint_t)physical < (base + regsize)) {
regnum = i + 1;
*off = (off_t)(physical - base);
break;
}
}
kmem_free(regs, (size_t)length);
return (regnum);
error:
kmem_free(regs, (size_t)length);
return (-1);
}
/* data access attributes structure for register access */
#ifdef _BIG_ENDIAN
static ddi_device_acc_attr_t dev_attr = {
DDI_DEVICE_ATTR_V0,
DDI_STRUCTURE_LE_ACC,
DDI_STRICTORDER_ACC,
};
#else
static ddi_device_acc_attr_t dev_attr = {
DDI_DEVICE_ATTR_V0,
DDI_NEVERSWAP_ACC,
DDI_STRICTORDER_ACC,
};
#endif /* _BIG_ENDIAN */
int
do_ioremap(dev_info_t *devi, drm_device_iomap_t *iomap)
{
int regnum;
off_t offset;
int ret;
regnum = drm_get_pci_index_reg(devi, iomap->physical,
iomap->size, &offset);
if (regnum < 0) {
DRM_ERROR("do_ioremap: can not find register entry,"
" start=0x%x, size=0x%x", iomap->physical, iomap->size);
return (ENXIO);
}
iomap->drm_regnum = regnum;
ret = ddi_regs_map_setup(devi, iomap->drm_regnum,
(caddr_t *)&(iomap->drm_base), (offset_t)offset,
(offset_t)iomap->size, &dev_attr, &iomap->drm_handle);
if (ret < 0) {
DRM_ERROR("do_ioremap: failed to map regs: regno=%d,"
" offset=0x%lx", regnum, offset);
iomap->drm_handle = NULL;
return (EFAULT);
}
return (0);
}
int
drm_ioremap(drm_device_t *softstate, drm_local_map_t *map)
{
drm_device_iomap_t iomap;
int ret;
DRM_DEBUG("drm_ioremap called\n");
bzero(&iomap, sizeof (drm_device_iomap_t));
iomap.physical = map->offset;
iomap.size = map->size;
ret = do_ioremap(softstate->dip, &iomap);
if (ret) {
DRM_ERROR("drm_ioremap: failed, physaddr=0x%lx, size=0x%lx",
map->offset, map->size);
return (ret);
}
/* ddi_acc_handle_t */
map->dev_handle = iomap.drm_handle;
map->handle = (void *)iomap.drm_base;
map->dev_addr = iomap.drm_base;
DRM_DEBUG(
"map->handle is %p map->dev_addr is %lx",
(void *)map->handle, (unsigned long)map->dev_addr);
return (0);
}
void
drm_ioremapfree(drm_local_map_t *map)
{
if (map->dev_handle == NULL) {
DRM_ERROR("drm_ioremapfree: handle is NULL");
return;
}
ddi_regs_map_free(&map->dev_handle);
}