/* * Copyright (c) 2006, 2013, Oracle and/or its affiliates. All rights reserved. */ /* * Copyright (c) 2012 Intel Corporation. All rights reserved. */ /** * \file drm_pci.h * \brief PCI consistent, DMA-accessible memory functions. * * \author Eric Anholt */ /*- * Copyright 2003 Eric Anholt. * All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ /**********************************************************************/ /** \name PCI memory */ /*@{*/ #include "drmP.h" #include typedef struct drm_pci_resource { uint_t regnum; unsigned long offset; unsigned long size; } drm_pci_resource_t; void drm_core_ioremap(struct drm_local_map *map, struct drm_device *dev) { if ((map->type == _DRM_AGP) && dev->agp) { /* * During AGP mapping initialization, we map AGP aperture * into kernel space. So, when we access the memory which * managed by agp gart in kernel space, we have to go * through two-level address translation: kernel virtual * address --> aperture address --> physical address. For * improving this, here in opensourced code, agp_remap() * gets invoking to dispose the mapping between agp aperture * and kernel space, and directly map the actual physical * memory which is allocated to agp gart to kernel space. * After that, access to physical memory managed by agp gart * hardware in kernel space doesn't go through agp hardware, * it will be: kernel virtual ---> physical address. * Obviously, it is more efficient. But in Solaris operating * system, the ioctl AGPIOC_ALLOCATE of agpgart driver does * not return physical address. We are unable to create the * direct mapping between kernel space and agp memory. So, * we remove the calling to agp_remap(). */ DRM_DEBUG("drm_core_ioremap: skipping agp_remap\n"); } else { (void) drm_ioremap(dev, map); } } void drm_core_ioremapfree(struct drm_local_map *map, struct drm_device *dev) { _NOTE(ARGUNUSED(dev)) if (map->type != _DRM_AGP) { if (map->handle && map->size) drm_ioremapfree(map); } else { /* * Refer to the comments in drm_core_ioremap() where we removed * the calling to agp_remap(), correspondingly, we remove the * calling to agp_remap_free(dev, map); */ DRM_DEBUG("drm_core_ioremap: skipping agp_remap_free\n"); } } /* * pci_alloc_consistent() */ static ddi_dma_attr_t hw_dma_attr = { DMA_ATTR_V0, /* version */ 0, /* addr_lo */ 0xffffffff, /* addr_hi */ 0xffffffff, /* count_max */ 4096, /* alignment */ 0xfff, /* burstsize */ 1, /* minxfer */ 0xffffffff, /* maxxfer */ 0xffffffff, /* seg */ 1, /* sgllen */ 4, /* granular */ DDI_DMA_FLAGERR, /* flags */ }; static ddi_device_acc_attr_t hw_acc_attr = { DDI_DEVICE_ATTR_V0, DDI_NEVERSWAP_ACC, DDI_STRICTORDER_ACC, DDI_FLAGERR_ACC }; void * drm_pci_alloc(struct drm_device *dev, size_t size, size_t align, dma_addr_t maxaddr, int segments) { struct drm_dma_handle *dmah; uint_t count; /* allocate continous physical memory for hw status page */ hw_dma_attr.dma_attr_align = (!align) ? 1 : align; hw_dma_attr.dma_attr_addr_hi = maxaddr; hw_dma_attr.dma_attr_sgllen = segments; dmah = kmem_zalloc(sizeof(struct drm_dma_handle), KM_SLEEP); if (ddi_dma_alloc_handle(dev->devinfo, &hw_dma_attr, DDI_DMA_SLEEP, NULL, &dmah->dma_hdl) != DDI_SUCCESS) { DRM_ERROR("ddi_dma_alloc_handle() failed"); goto err3; } if (ddi_dma_mem_alloc(dmah->dma_hdl, size, &hw_acc_attr, DDI_DMA_CONSISTENT | IOMEM_DATA_UNCACHED, DDI_DMA_SLEEP, NULL, (caddr_t *)&dmah->vaddr, &dmah->real_sz, &dmah->acc_hdl) != DDI_SUCCESS) { DRM_ERROR("ddi_dma_mem_alloc() failed\n"); goto err2; } if (ddi_dma_addr_bind_handle(dmah->dma_hdl, NULL, (caddr_t)dmah->vaddr, dmah->real_sz, DDI_DMA_RDWR|DDI_DMA_CONSISTENT, DDI_DMA_SLEEP, NULL, &dmah->cookie, &count) != DDI_DMA_MAPPED) { DRM_ERROR("ddi_dma_addr_bind_handle() failed"); goto err1; } if (count > segments) { (void) ddi_dma_unbind_handle(dmah->dma_hdl); goto err1; } dmah->cookie_num = count; if (count == 1) dmah->paddr = dmah->cookie.dmac_address; return (dmah); err1: ddi_dma_mem_free(&dmah->acc_hdl); err2: ddi_dma_free_handle(&dmah->dma_hdl); err3: kmem_free(dmah, sizeof (*dmah)); return (NULL); } void drm_pci_free(drm_dma_handle_t *dmah) { ASSERT(dmah != NULL); (void) ddi_dma_unbind_handle(dmah->dma_hdl); ddi_dma_mem_free(&dmah->acc_hdl); ddi_dma_free_handle(&dmah->dma_hdl); kmem_free(dmah, sizeof (drm_dma_handle_t)); } int do_get_pci_res(struct drm_device *dev, drm_pci_resource_t *resp) { int length; pci_regspec_t *regs; if (ddi_getlongprop( DDI_DEV_T_ANY, dev->devinfo, DDI_PROP_DONTPASS, "assigned-addresses", (caddr_t)®s, &length) != DDI_PROP_SUCCESS) { DRM_ERROR("do_get_pci_res: ddi_getlongprop failed!\n"); return (EFAULT); } resp->offset = (unsigned long)regs[resp->regnum].pci_phys_low; resp->size = (unsigned long)regs[resp->regnum].pci_size_low; kmem_free(regs, (size_t)length); return (0); } unsigned long drm_get_resource_start(struct drm_device *dev, unsigned int regnum) { drm_pci_resource_t res; int ret; res.regnum = regnum; ret = do_get_pci_res(dev, &res); if (ret != 0) { DRM_ERROR("drm_get_resource_start: ioctl failed"); return (0); } return (res.offset); } unsigned long drm_get_resource_len(struct drm_device *softstate, unsigned int regnum) { drm_pci_resource_t res; int ret; res.regnum = regnum; ret = do_get_pci_res(softstate, &res); if (ret != 0) { DRM_ERROR("drm_get_resource_len: ioctl failed"); return (0); } return (res.size); }