2011-11-16 22:31:31 -07:00
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/*
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* IOMMU API for SMMU in Tegra30
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*
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* Copyright (c) 2011-2012, NVIDIA CORPORATION. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#define pr_fmt(fmt) "%s(): " fmt, __func__
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/spinlock.h>
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#include <linux/slab.h>
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#include <linux/vmalloc.h>
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#include <linux/mm.h>
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#include <linux/pagemap.h>
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#include <linux/device.h>
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#include <linux/sched.h>
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#include <linux/iommu.h>
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#include <linux/io.h>
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2012-06-25 05:23:55 -06:00
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#include <linux/of.h>
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#include <linux/of_iommu.h>
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2011-11-16 22:31:31 -07:00
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#include <asm/page.h>
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#include <asm/cacheflush.h>
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#include <mach/iomap.h>
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#include <mach/smmu.h>
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2012-06-25 05:23:55 -06:00
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#include <mach/tegra-ahb.h>
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2011-11-16 22:31:31 -07:00
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/* bitmap of the page sizes currently supported */
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#define SMMU_IOMMU_PGSIZES (SZ_4K)
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#define SMMU_CONFIG 0x10
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#define SMMU_CONFIG_DISABLE 0
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#define SMMU_CONFIG_ENABLE 1
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#define SMMU_TLB_CONFIG 0x14
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#define SMMU_TLB_CONFIG_STATS__MASK (1 << 31)
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#define SMMU_TLB_CONFIG_STATS__ENABLE (1 << 31)
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#define SMMU_TLB_CONFIG_HIT_UNDER_MISS__ENABLE (1 << 29)
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#define SMMU_TLB_CONFIG_ACTIVE_LINES__VALUE 0x10
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#define SMMU_TLB_CONFIG_RESET_VAL 0x20000010
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#define SMMU_PTC_CONFIG 0x18
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#define SMMU_PTC_CONFIG_STATS__MASK (1 << 31)
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#define SMMU_PTC_CONFIG_STATS__ENABLE (1 << 31)
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#define SMMU_PTC_CONFIG_CACHE__ENABLE (1 << 29)
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#define SMMU_PTC_CONFIG_INDEX_MAP__PATTERN 0x3f
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#define SMMU_PTC_CONFIG_RESET_VAL 0x2000003f
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#define SMMU_PTB_ASID 0x1c
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#define SMMU_PTB_ASID_CURRENT_SHIFT 0
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#define SMMU_PTB_DATA 0x20
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#define SMMU_PTB_DATA_RESET_VAL 0
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#define SMMU_PTB_DATA_ASID_NONSECURE_SHIFT 29
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#define SMMU_PTB_DATA_ASID_WRITABLE_SHIFT 30
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#define SMMU_PTB_DATA_ASID_READABLE_SHIFT 31
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#define SMMU_TLB_FLUSH 0x30
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#define SMMU_TLB_FLUSH_VA_MATCH_ALL 0
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#define SMMU_TLB_FLUSH_VA_MATCH_SECTION 2
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#define SMMU_TLB_FLUSH_VA_MATCH_GROUP 3
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#define SMMU_TLB_FLUSH_ASID_SHIFT 29
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#define SMMU_TLB_FLUSH_ASID_MATCH_DISABLE 0
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#define SMMU_TLB_FLUSH_ASID_MATCH_ENABLE 1
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#define SMMU_TLB_FLUSH_ASID_MATCH_SHIFT 31
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#define SMMU_PTC_FLUSH 0x34
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#define SMMU_PTC_FLUSH_TYPE_ALL 0
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#define SMMU_PTC_FLUSH_TYPE_ADR 1
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#define SMMU_PTC_FLUSH_ADR_SHIFT 4
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#define SMMU_ASID_SECURITY 0x38
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#define SMMU_STATS_TLB_HIT_COUNT 0x1f0
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#define SMMU_STATS_TLB_MISS_COUNT 0x1f4
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#define SMMU_STATS_PTC_HIT_COUNT 0x1f8
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#define SMMU_STATS_PTC_MISS_COUNT 0x1fc
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#define SMMU_TRANSLATION_ENABLE_0 0x228
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#define SMMU_TRANSLATION_ENABLE_1 0x22c
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#define SMMU_TRANSLATION_ENABLE_2 0x230
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#define SMMU_AFI_ASID 0x238 /* PCIE */
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#define SMMU_AVPC_ASID 0x23c /* AVP */
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#define SMMU_DC_ASID 0x240 /* Display controller */
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#define SMMU_DCB_ASID 0x244 /* Display controller B */
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#define SMMU_EPP_ASID 0x248 /* Encoder pre-processor */
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#define SMMU_G2_ASID 0x24c /* 2D engine */
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#define SMMU_HC_ASID 0x250 /* Host1x */
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#define SMMU_HDA_ASID 0x254 /* High-def audio */
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#define SMMU_ISP_ASID 0x258 /* Image signal processor */
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#define SMMU_MPE_ASID 0x264 /* MPEG encoder */
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#define SMMU_NV_ASID 0x268 /* (3D) */
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#define SMMU_NV2_ASID 0x26c /* (3D) */
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#define SMMU_PPCS_ASID 0x270 /* AHB */
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#define SMMU_SATA_ASID 0x278 /* SATA */
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#define SMMU_VDE_ASID 0x27c /* Video decoder */
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#define SMMU_VI_ASID 0x280 /* Video input */
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#define SMMU_PDE_NEXT_SHIFT 28
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#define SMMU_TLB_FLUSH_VA_SECTION__MASK 0xffc00000
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#define SMMU_TLB_FLUSH_VA_SECTION__SHIFT 12 /* right shift */
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#define SMMU_TLB_FLUSH_VA_GROUP__MASK 0xffffc000
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#define SMMU_TLB_FLUSH_VA_GROUP__SHIFT 12 /* right shift */
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#define SMMU_TLB_FLUSH_VA(iova, which) \
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((((iova) & SMMU_TLB_FLUSH_VA_##which##__MASK) >> \
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SMMU_TLB_FLUSH_VA_##which##__SHIFT) | \
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SMMU_TLB_FLUSH_VA_MATCH_##which)
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#define SMMU_PTB_ASID_CUR(n) \
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((n) << SMMU_PTB_ASID_CURRENT_SHIFT)
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#define SMMU_TLB_FLUSH_ASID_MATCH_disable \
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(SMMU_TLB_FLUSH_ASID_MATCH_DISABLE << \
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SMMU_TLB_FLUSH_ASID_MATCH_SHIFT)
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#define SMMU_TLB_FLUSH_ASID_MATCH__ENABLE \
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(SMMU_TLB_FLUSH_ASID_MATCH_ENABLE << \
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SMMU_TLB_FLUSH_ASID_MATCH_SHIFT)
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#define SMMU_PAGE_SHIFT 12
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#define SMMU_PAGE_SIZE (1 << SMMU_PAGE_SHIFT)
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#define SMMU_PAGE_MASK ((1 << SMMU_PAGE_SHIFT) - 1)
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#define SMMU_PDIR_COUNT 1024
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#define SMMU_PDIR_SIZE (sizeof(unsigned long) * SMMU_PDIR_COUNT)
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#define SMMU_PTBL_COUNT 1024
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#define SMMU_PTBL_SIZE (sizeof(unsigned long) * SMMU_PTBL_COUNT)
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#define SMMU_PDIR_SHIFT 12
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#define SMMU_PDE_SHIFT 12
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#define SMMU_PTE_SHIFT 12
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#define SMMU_PFN_MASK 0x000fffff
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#define SMMU_ADDR_TO_PFN(addr) ((addr) >> 12)
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#define SMMU_ADDR_TO_PDN(addr) ((addr) >> 22)
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#define SMMU_PDN_TO_ADDR(addr) ((pdn) << 22)
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#define _READABLE (1 << SMMU_PTB_DATA_ASID_READABLE_SHIFT)
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#define _WRITABLE (1 << SMMU_PTB_DATA_ASID_WRITABLE_SHIFT)
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#define _NONSECURE (1 << SMMU_PTB_DATA_ASID_NONSECURE_SHIFT)
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#define _PDE_NEXT (1 << SMMU_PDE_NEXT_SHIFT)
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#define _MASK_ATTR (_READABLE | _WRITABLE | _NONSECURE)
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#define _PDIR_ATTR (_READABLE | _WRITABLE | _NONSECURE)
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#define _PDE_ATTR (_READABLE | _WRITABLE | _NONSECURE)
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#define _PDE_ATTR_N (_PDE_ATTR | _PDE_NEXT)
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#define _PDE_VACANT(pdn) (((pdn) << 10) | _PDE_ATTR)
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#define _PTE_ATTR (_READABLE | _WRITABLE | _NONSECURE)
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#define _PTE_VACANT(addr) (((addr) >> SMMU_PAGE_SHIFT) | _PTE_ATTR)
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#define SMMU_MK_PDIR(page, attr) \
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((page_to_phys(page) >> SMMU_PDIR_SHIFT) | (attr))
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#define SMMU_MK_PDE(page, attr) \
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(unsigned long)((page_to_phys(page) >> SMMU_PDE_SHIFT) | (attr))
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#define SMMU_EX_PTBL_PAGE(pde) \
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pfn_to_page((unsigned long)(pde) & SMMU_PFN_MASK)
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#define SMMU_PFN_TO_PTE(pfn, attr) (unsigned long)((pfn) | (attr))
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#define SMMU_ASID_ENABLE(asid) ((asid) | (1 << 31))
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#define SMMU_ASID_DISABLE 0
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#define SMMU_ASID_ASID(n) ((n) & ~SMMU_ASID_ENABLE(0))
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2012-06-25 05:23:55 -06:00
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#define NUM_SMMU_REG_BANKS 3
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2011-11-16 22:31:31 -07:00
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#define smmu_client_enable_hwgrp(c, m) smmu_client_set_hwgrp(c, m, 1)
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#define smmu_client_disable_hwgrp(c) smmu_client_set_hwgrp(c, 0, 0)
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#define __smmu_client_enable_hwgrp(c, m) __smmu_client_set_hwgrp(c, m, 1)
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#define __smmu_client_disable_hwgrp(c) __smmu_client_set_hwgrp(c, 0, 0)
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#define HWGRP_INIT(client) [HWGRP_##client] = SMMU_##client##_ASID
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static const u32 smmu_hwgrp_asid_reg[] = {
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HWGRP_INIT(AFI),
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HWGRP_INIT(AVPC),
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HWGRP_INIT(DC),
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HWGRP_INIT(DCB),
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HWGRP_INIT(EPP),
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HWGRP_INIT(G2),
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HWGRP_INIT(HC),
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HWGRP_INIT(HDA),
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HWGRP_INIT(ISP),
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HWGRP_INIT(MPE),
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HWGRP_INIT(NV),
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HWGRP_INIT(NV2),
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HWGRP_INIT(PPCS),
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HWGRP_INIT(SATA),
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HWGRP_INIT(VDE),
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HWGRP_INIT(VI),
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};
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#define HWGRP_ASID_REG(x) (smmu_hwgrp_asid_reg[x])
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/*
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* Per client for address space
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*/
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struct smmu_client {
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struct device *dev;
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struct list_head list;
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struct smmu_as *as;
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u32 hwgrp;
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};
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/*
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* Per address space
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*/
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struct smmu_as {
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struct smmu_device *smmu; /* back pointer to container */
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unsigned int asid;
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spinlock_t lock; /* for pagetable */
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struct page *pdir_page;
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unsigned long pdir_attr;
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unsigned long pde_attr;
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unsigned long pte_attr;
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unsigned int *pte_count;
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struct list_head client;
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spinlock_t client_lock; /* for client list */
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};
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/*
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* Per SMMU device - IOMMU device
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*/
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struct smmu_device {
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void __iomem *regs[NUM_SMMU_REG_BANKS];
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unsigned long iovmm_base; /* remappable base address */
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unsigned long page_count; /* total remappable size */
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spinlock_t lock;
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char *name;
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struct device *dev;
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struct page *avp_vector_page; /* dummy page shared by all AS's */
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/*
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* Register image savers for suspend/resume
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*/
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unsigned long translation_enable_0;
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unsigned long translation_enable_1;
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unsigned long translation_enable_2;
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unsigned long asid_security;
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struct device_node *ahb;
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int num_as;
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struct smmu_as as[0]; /* Run-time allocated array */
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};
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static struct smmu_device *smmu_handle; /* unique for a system */
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/*
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* SMMU register accessors
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*/
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static inline u32 smmu_read(struct smmu_device *smmu, size_t offs)
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{
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BUG_ON(offs < 0x10);
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if (offs < 0x3c)
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return readl(smmu->regs[0] + offs - 0x10);
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BUG_ON(offs < 0x1f0);
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if (offs < 0x200)
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return readl(smmu->regs[1] + offs - 0x1f0);
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BUG_ON(offs < 0x228);
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if (offs < 0x284)
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return readl(smmu->regs[2] + offs - 0x228);
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BUG();
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}
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static inline void smmu_write(struct smmu_device *smmu, u32 val, size_t offs)
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{
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BUG_ON(offs < 0x10);
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if (offs < 0x3c) {
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writel(val, smmu->regs[0] + offs - 0x10);
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return;
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}
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BUG_ON(offs < 0x1f0);
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if (offs < 0x200) {
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writel(val, smmu->regs[1] + offs - 0x1f0);
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return;
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}
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BUG_ON(offs < 0x228);
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if (offs < 0x284) {
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writel(val, smmu->regs[2] + offs - 0x228);
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return;
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}
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BUG();
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}
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#define VA_PAGE_TO_PA(va, page) \
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(page_to_phys(page) + ((unsigned long)(va) & ~PAGE_MASK))
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#define FLUSH_CPU_DCACHE(va, page, size) \
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do { \
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unsigned long _pa_ = VA_PAGE_TO_PA(va, page); \
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__cpuc_flush_dcache_area((void *)(va), (size_t)(size)); \
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outer_flush_range(_pa_, _pa_+(size_t)(size)); \
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} while (0)
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/*
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|
|
* Any interaction between any block on PPSB and a block on APB or AHB
|
|
|
|
* must have these read-back barriers to ensure the APB/AHB bus
|
|
|
|
* transaction is complete before initiating activity on the PPSB
|
|
|
|
* block.
|
|
|
|
*/
|
|
|
|
#define FLUSH_SMMU_REGS(smmu) smmu_read(smmu, SMMU_CONFIG)
|
|
|
|
|
|
|
|
#define smmu_client_hwgrp(c) (u32)((c)->dev->platform_data)
|
|
|
|
|
|
|
|
static int __smmu_client_set_hwgrp(struct smmu_client *c,
|
|
|
|
unsigned long map, int on)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
struct smmu_as *as = c->as;
|
|
|
|
u32 val, offs, mask = SMMU_ASID_ENABLE(as->asid);
|
|
|
|
struct smmu_device *smmu = as->smmu;
|
|
|
|
|
|
|
|
WARN_ON(!on && map);
|
|
|
|
if (on && !map)
|
|
|
|
return -EINVAL;
|
|
|
|
if (!on)
|
|
|
|
map = smmu_client_hwgrp(c);
|
|
|
|
|
|
|
|
for_each_set_bit(i, &map, HWGRP_COUNT) {
|
|
|
|
offs = HWGRP_ASID_REG(i);
|
|
|
|
val = smmu_read(smmu, offs);
|
|
|
|
if (on) {
|
|
|
|
if (WARN_ON(val & mask))
|
|
|
|
goto err_hw_busy;
|
|
|
|
val |= mask;
|
|
|
|
} else {
|
|
|
|
WARN_ON((val & mask) == mask);
|
|
|
|
val &= ~mask;
|
|
|
|
}
|
|
|
|
smmu_write(smmu, val, offs);
|
|
|
|
}
|
|
|
|
FLUSH_SMMU_REGS(smmu);
|
|
|
|
c->hwgrp = map;
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
err_hw_busy:
|
|
|
|
for_each_set_bit(i, &map, HWGRP_COUNT) {
|
|
|
|
offs = HWGRP_ASID_REG(i);
|
|
|
|
val = smmu_read(smmu, offs);
|
|
|
|
val &= ~mask;
|
|
|
|
smmu_write(smmu, val, offs);
|
|
|
|
}
|
|
|
|
return -EBUSY;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int smmu_client_set_hwgrp(struct smmu_client *c, u32 map, int on)
|
|
|
|
{
|
|
|
|
u32 val;
|
|
|
|
unsigned long flags;
|
|
|
|
struct smmu_as *as = c->as;
|
|
|
|
struct smmu_device *smmu = as->smmu;
|
|
|
|
|
|
|
|
spin_lock_irqsave(&smmu->lock, flags);
|
|
|
|
val = __smmu_client_set_hwgrp(c, map, on);
|
|
|
|
spin_unlock_irqrestore(&smmu->lock, flags);
|
|
|
|
return val;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Flush all TLB entries and all PTC entries
|
|
|
|
* Caller must lock smmu
|
|
|
|
*/
|
|
|
|
static void smmu_flush_regs(struct smmu_device *smmu, int enable)
|
|
|
|
{
|
|
|
|
u32 val;
|
|
|
|
|
|
|
|
smmu_write(smmu, SMMU_PTC_FLUSH_TYPE_ALL, SMMU_PTC_FLUSH);
|
|
|
|
FLUSH_SMMU_REGS(smmu);
|
|
|
|
val = SMMU_TLB_FLUSH_VA_MATCH_ALL |
|
|
|
|
SMMU_TLB_FLUSH_ASID_MATCH_disable;
|
|
|
|
smmu_write(smmu, val, SMMU_TLB_FLUSH);
|
|
|
|
|
|
|
|
if (enable)
|
|
|
|
smmu_write(smmu, SMMU_CONFIG_ENABLE, SMMU_CONFIG);
|
|
|
|
FLUSH_SMMU_REGS(smmu);
|
|
|
|
}
|
|
|
|
|
2012-06-25 05:23:55 -06:00
|
|
|
static int smmu_setup_regs(struct smmu_device *smmu)
|
2011-11-16 22:31:31 -07:00
|
|
|
{
|
|
|
|
int i;
|
|
|
|
u32 val;
|
|
|
|
|
|
|
|
for (i = 0; i < smmu->num_as; i++) {
|
|
|
|
struct smmu_as *as = &smmu->as[i];
|
|
|
|
struct smmu_client *c;
|
|
|
|
|
|
|
|
smmu_write(smmu, SMMU_PTB_ASID_CUR(as->asid), SMMU_PTB_ASID);
|
|
|
|
val = as->pdir_page ?
|
|
|
|
SMMU_MK_PDIR(as->pdir_page, as->pdir_attr) :
|
|
|
|
SMMU_PTB_DATA_RESET_VAL;
|
|
|
|
smmu_write(smmu, val, SMMU_PTB_DATA);
|
|
|
|
|
|
|
|
list_for_each_entry(c, &as->client, list)
|
|
|
|
__smmu_client_set_hwgrp(c, c->hwgrp, 1);
|
|
|
|
}
|
|
|
|
|
|
|
|
smmu_write(smmu, smmu->translation_enable_0, SMMU_TRANSLATION_ENABLE_0);
|
|
|
|
smmu_write(smmu, smmu->translation_enable_1, SMMU_TRANSLATION_ENABLE_1);
|
|
|
|
smmu_write(smmu, smmu->translation_enable_2, SMMU_TRANSLATION_ENABLE_2);
|
|
|
|
smmu_write(smmu, smmu->asid_security, SMMU_ASID_SECURITY);
|
|
|
|
smmu_write(smmu, SMMU_TLB_CONFIG_RESET_VAL, SMMU_TLB_CONFIG);
|
|
|
|
smmu_write(smmu, SMMU_PTC_CONFIG_RESET_VAL, SMMU_PTC_CONFIG);
|
|
|
|
|
|
|
|
smmu_flush_regs(smmu, 1);
|
|
|
|
|
2012-06-25 05:23:55 -06:00
|
|
|
return tegra_ahb_enable_smmu(smmu->ahb);
|
2011-11-16 22:31:31 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
static void flush_ptc_and_tlb(struct smmu_device *smmu,
|
|
|
|
struct smmu_as *as, dma_addr_t iova,
|
|
|
|
unsigned long *pte, struct page *page, int is_pde)
|
|
|
|
{
|
|
|
|
u32 val;
|
|
|
|
unsigned long tlb_flush_va = is_pde
|
|
|
|
? SMMU_TLB_FLUSH_VA(iova, SECTION)
|
|
|
|
: SMMU_TLB_FLUSH_VA(iova, GROUP);
|
|
|
|
|
|
|
|
val = SMMU_PTC_FLUSH_TYPE_ADR | VA_PAGE_TO_PA(pte, page);
|
|
|
|
smmu_write(smmu, val, SMMU_PTC_FLUSH);
|
|
|
|
FLUSH_SMMU_REGS(smmu);
|
|
|
|
val = tlb_flush_va |
|
|
|
|
SMMU_TLB_FLUSH_ASID_MATCH__ENABLE |
|
|
|
|
(as->asid << SMMU_TLB_FLUSH_ASID_SHIFT);
|
|
|
|
smmu_write(smmu, val, SMMU_TLB_FLUSH);
|
|
|
|
FLUSH_SMMU_REGS(smmu);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void free_ptbl(struct smmu_as *as, dma_addr_t iova)
|
|
|
|
{
|
|
|
|
unsigned long pdn = SMMU_ADDR_TO_PDN(iova);
|
|
|
|
unsigned long *pdir = (unsigned long *)page_address(as->pdir_page);
|
|
|
|
|
|
|
|
if (pdir[pdn] != _PDE_VACANT(pdn)) {
|
|
|
|
dev_dbg(as->smmu->dev, "pdn: %lx\n", pdn);
|
|
|
|
|
|
|
|
ClearPageReserved(SMMU_EX_PTBL_PAGE(pdir[pdn]));
|
|
|
|
__free_page(SMMU_EX_PTBL_PAGE(pdir[pdn]));
|
|
|
|
pdir[pdn] = _PDE_VACANT(pdn);
|
|
|
|
FLUSH_CPU_DCACHE(&pdir[pdn], as->pdir_page, sizeof pdir[pdn]);
|
|
|
|
flush_ptc_and_tlb(as->smmu, as, iova, &pdir[pdn],
|
|
|
|
as->pdir_page, 1);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void free_pdir(struct smmu_as *as)
|
|
|
|
{
|
|
|
|
unsigned addr;
|
|
|
|
int count;
|
|
|
|
struct device *dev = as->smmu->dev;
|
|
|
|
|
|
|
|
if (!as->pdir_page)
|
|
|
|
return;
|
|
|
|
|
|
|
|
addr = as->smmu->iovmm_base;
|
|
|
|
count = as->smmu->page_count;
|
|
|
|
while (count-- > 0) {
|
|
|
|
free_ptbl(as, addr);
|
|
|
|
addr += SMMU_PAGE_SIZE * SMMU_PTBL_COUNT;
|
|
|
|
}
|
|
|
|
ClearPageReserved(as->pdir_page);
|
|
|
|
__free_page(as->pdir_page);
|
|
|
|
as->pdir_page = NULL;
|
|
|
|
devm_kfree(dev, as->pte_count);
|
|
|
|
as->pte_count = NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Maps PTBL for given iova and returns the PTE address
|
|
|
|
* Caller must unmap the mapped PTBL returned in *ptbl_page_p
|
|
|
|
*/
|
|
|
|
static unsigned long *locate_pte(struct smmu_as *as,
|
|
|
|
dma_addr_t iova, bool allocate,
|
|
|
|
struct page **ptbl_page_p,
|
|
|
|
unsigned int **count)
|
|
|
|
{
|
|
|
|
unsigned long ptn = SMMU_ADDR_TO_PFN(iova);
|
|
|
|
unsigned long pdn = SMMU_ADDR_TO_PDN(iova);
|
|
|
|
unsigned long *pdir = page_address(as->pdir_page);
|
|
|
|
unsigned long *ptbl;
|
|
|
|
|
|
|
|
if (pdir[pdn] != _PDE_VACANT(pdn)) {
|
|
|
|
/* Mapped entry table already exists */
|
|
|
|
*ptbl_page_p = SMMU_EX_PTBL_PAGE(pdir[pdn]);
|
|
|
|
ptbl = page_address(*ptbl_page_p);
|
|
|
|
} else if (!allocate) {
|
|
|
|
return NULL;
|
|
|
|
} else {
|
|
|
|
int pn;
|
|
|
|
unsigned long addr = SMMU_PDN_TO_ADDR(pdn);
|
|
|
|
|
|
|
|
/* Vacant - allocate a new page table */
|
|
|
|
dev_dbg(as->smmu->dev, "New PTBL pdn: %lx\n", pdn);
|
|
|
|
|
|
|
|
*ptbl_page_p = alloc_page(GFP_ATOMIC);
|
|
|
|
if (!*ptbl_page_p) {
|
|
|
|
dev_err(as->smmu->dev,
|
|
|
|
"failed to allocate smmu_device page table\n");
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
SetPageReserved(*ptbl_page_p);
|
|
|
|
ptbl = (unsigned long *)page_address(*ptbl_page_p);
|
|
|
|
for (pn = 0; pn < SMMU_PTBL_COUNT;
|
|
|
|
pn++, addr += SMMU_PAGE_SIZE) {
|
|
|
|
ptbl[pn] = _PTE_VACANT(addr);
|
|
|
|
}
|
|
|
|
FLUSH_CPU_DCACHE(ptbl, *ptbl_page_p, SMMU_PTBL_SIZE);
|
|
|
|
pdir[pdn] = SMMU_MK_PDE(*ptbl_page_p,
|
|
|
|
as->pde_attr | _PDE_NEXT);
|
|
|
|
FLUSH_CPU_DCACHE(&pdir[pdn], as->pdir_page, sizeof pdir[pdn]);
|
|
|
|
flush_ptc_and_tlb(as->smmu, as, iova, &pdir[pdn],
|
|
|
|
as->pdir_page, 1);
|
|
|
|
}
|
|
|
|
*count = &as->pte_count[pdn];
|
|
|
|
|
|
|
|
return &ptbl[ptn % SMMU_PTBL_COUNT];
|
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef CONFIG_SMMU_SIG_DEBUG
|
|
|
|
static void put_signature(struct smmu_as *as,
|
|
|
|
dma_addr_t iova, unsigned long pfn)
|
|
|
|
{
|
|
|
|
struct page *page;
|
|
|
|
unsigned long *vaddr;
|
|
|
|
|
|
|
|
page = pfn_to_page(pfn);
|
|
|
|
vaddr = page_address(page);
|
|
|
|
if (!vaddr)
|
|
|
|
return;
|
|
|
|
|
|
|
|
vaddr[0] = iova;
|
|
|
|
vaddr[1] = pfn << PAGE_SHIFT;
|
|
|
|
FLUSH_CPU_DCACHE(vaddr, page, sizeof(vaddr[0]) * 2);
|
|
|
|
}
|
|
|
|
#else
|
|
|
|
static inline void put_signature(struct smmu_as *as,
|
|
|
|
unsigned long addr, unsigned long pfn)
|
|
|
|
{
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/*
|
2012-07-17 03:47:14 -06:00
|
|
|
* Caller must not hold as->lock
|
2011-11-16 22:31:31 -07:00
|
|
|
*/
|
|
|
|
static int alloc_pdir(struct smmu_as *as)
|
|
|
|
{
|
2012-07-17 03:47:14 -06:00
|
|
|
unsigned long *pdir, flags;
|
2012-07-02 05:26:38 -06:00
|
|
|
int pdn, err = 0;
|
2011-11-16 22:31:31 -07:00
|
|
|
u32 val;
|
|
|
|
struct smmu_device *smmu = as->smmu;
|
2012-07-02 05:26:38 -06:00
|
|
|
struct page *page;
|
|
|
|
unsigned int *cnt;
|
2011-11-16 22:31:31 -07:00
|
|
|
|
2012-07-02 05:26:38 -06:00
|
|
|
/*
|
2012-07-17 03:47:14 -06:00
|
|
|
* do the allocation, then grab as->lock
|
2012-07-02 05:26:38 -06:00
|
|
|
*/
|
|
|
|
cnt = devm_kzalloc(smmu->dev,
|
2012-07-17 03:47:14 -06:00
|
|
|
sizeof(cnt[0]) * SMMU_PDIR_COUNT,
|
|
|
|
GFP_KERNEL);
|
2012-07-02 05:26:38 -06:00
|
|
|
page = alloc_page(GFP_KERNEL | __GFP_DMA);
|
2011-11-16 22:31:31 -07:00
|
|
|
|
2012-07-17 03:47:14 -06:00
|
|
|
spin_lock_irqsave(&as->lock, flags);
|
2011-11-16 22:31:31 -07:00
|
|
|
|
2012-07-02 05:26:38 -06:00
|
|
|
if (as->pdir_page) {
|
|
|
|
/* We raced, free the redundant */
|
|
|
|
err = -EAGAIN;
|
|
|
|
goto err_out;
|
2011-11-16 22:31:31 -07:00
|
|
|
}
|
2012-07-02 05:26:38 -06:00
|
|
|
|
|
|
|
if (!page || !cnt) {
|
|
|
|
dev_err(smmu->dev, "failed to allocate at %s\n", __func__);
|
|
|
|
err = -ENOMEM;
|
|
|
|
goto err_out;
|
2011-11-16 22:31:31 -07:00
|
|
|
}
|
2012-07-02 05:26:38 -06:00
|
|
|
|
|
|
|
as->pdir_page = page;
|
|
|
|
as->pte_count = cnt;
|
|
|
|
|
2011-11-16 22:31:31 -07:00
|
|
|
SetPageReserved(as->pdir_page);
|
|
|
|
pdir = page_address(as->pdir_page);
|
|
|
|
|
|
|
|
for (pdn = 0; pdn < SMMU_PDIR_COUNT; pdn++)
|
|
|
|
pdir[pdn] = _PDE_VACANT(pdn);
|
|
|
|
FLUSH_CPU_DCACHE(pdir, as->pdir_page, SMMU_PDIR_SIZE);
|
|
|
|
val = SMMU_PTC_FLUSH_TYPE_ADR | VA_PAGE_TO_PA(pdir, as->pdir_page);
|
|
|
|
smmu_write(smmu, val, SMMU_PTC_FLUSH);
|
|
|
|
FLUSH_SMMU_REGS(as->smmu);
|
|
|
|
val = SMMU_TLB_FLUSH_VA_MATCH_ALL |
|
|
|
|
SMMU_TLB_FLUSH_ASID_MATCH__ENABLE |
|
|
|
|
(as->asid << SMMU_TLB_FLUSH_ASID_SHIFT);
|
|
|
|
smmu_write(smmu, val, SMMU_TLB_FLUSH);
|
|
|
|
FLUSH_SMMU_REGS(as->smmu);
|
|
|
|
|
2012-07-17 03:47:14 -06:00
|
|
|
spin_unlock_irqrestore(&as->lock, flags);
|
|
|
|
|
2011-11-16 22:31:31 -07:00
|
|
|
return 0;
|
2012-07-02 05:26:38 -06:00
|
|
|
|
|
|
|
err_out:
|
2012-07-17 03:47:14 -06:00
|
|
|
spin_unlock_irqrestore(&as->lock, flags);
|
|
|
|
|
2012-07-02 05:26:38 -06:00
|
|
|
devm_kfree(smmu->dev, cnt);
|
|
|
|
if (page)
|
|
|
|
__free_page(page);
|
|
|
|
return err;
|
2011-11-16 22:31:31 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
static void __smmu_iommu_unmap(struct smmu_as *as, dma_addr_t iova)
|
|
|
|
{
|
|
|
|
unsigned long *pte;
|
|
|
|
struct page *page;
|
|
|
|
unsigned int *count;
|
|
|
|
|
|
|
|
pte = locate_pte(as, iova, false, &page, &count);
|
|
|
|
if (WARN_ON(!pte))
|
|
|
|
return;
|
|
|
|
|
|
|
|
if (WARN_ON(*pte == _PTE_VACANT(iova)))
|
|
|
|
return;
|
|
|
|
|
|
|
|
*pte = _PTE_VACANT(iova);
|
|
|
|
FLUSH_CPU_DCACHE(pte, page, sizeof(*pte));
|
|
|
|
flush_ptc_and_tlb(as->smmu, as, iova, pte, page, 0);
|
|
|
|
if (!--(*count)) {
|
|
|
|
free_ptbl(as, iova);
|
|
|
|
smmu_flush_regs(as->smmu, 0);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void __smmu_iommu_map_pfn(struct smmu_as *as, dma_addr_t iova,
|
|
|
|
unsigned long pfn)
|
|
|
|
{
|
|
|
|
struct smmu_device *smmu = as->smmu;
|
|
|
|
unsigned long *pte;
|
|
|
|
unsigned int *count;
|
|
|
|
struct page *page;
|
|
|
|
|
|
|
|
pte = locate_pte(as, iova, true, &page, &count);
|
|
|
|
if (WARN_ON(!pte))
|
|
|
|
return;
|
|
|
|
|
|
|
|
if (*pte == _PTE_VACANT(iova))
|
|
|
|
(*count)++;
|
|
|
|
*pte = SMMU_PFN_TO_PTE(pfn, as->pte_attr);
|
|
|
|
if (unlikely((*pte == _PTE_VACANT(iova))))
|
|
|
|
(*count)--;
|
|
|
|
FLUSH_CPU_DCACHE(pte, page, sizeof(*pte));
|
|
|
|
flush_ptc_and_tlb(smmu, as, iova, pte, page, 0);
|
|
|
|
put_signature(as, iova, pfn);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int smmu_iommu_map(struct iommu_domain *domain, unsigned long iova,
|
|
|
|
phys_addr_t pa, size_t bytes, int prot)
|
|
|
|
{
|
|
|
|
struct smmu_as *as = domain->priv;
|
|
|
|
unsigned long pfn = __phys_to_pfn(pa);
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
dev_dbg(as->smmu->dev, "[%d] %08lx:%08x\n", as->asid, iova, pa);
|
|
|
|
|
|
|
|
if (!pfn_valid(pfn))
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
spin_lock_irqsave(&as->lock, flags);
|
|
|
|
__smmu_iommu_map_pfn(as, iova, pfn);
|
|
|
|
spin_unlock_irqrestore(&as->lock, flags);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static size_t smmu_iommu_unmap(struct iommu_domain *domain, unsigned long iova,
|
|
|
|
size_t bytes)
|
|
|
|
{
|
|
|
|
struct smmu_as *as = domain->priv;
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
dev_dbg(as->smmu->dev, "[%d] %08lx\n", as->asid, iova);
|
|
|
|
|
|
|
|
spin_lock_irqsave(&as->lock, flags);
|
|
|
|
__smmu_iommu_unmap(as, iova);
|
|
|
|
spin_unlock_irqrestore(&as->lock, flags);
|
|
|
|
return SMMU_PAGE_SIZE;
|
|
|
|
}
|
|
|
|
|
|
|
|
static phys_addr_t smmu_iommu_iova_to_phys(struct iommu_domain *domain,
|
|
|
|
unsigned long iova)
|
|
|
|
{
|
|
|
|
struct smmu_as *as = domain->priv;
|
|
|
|
unsigned long *pte;
|
|
|
|
unsigned int *count;
|
|
|
|
struct page *page;
|
|
|
|
unsigned long pfn;
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
spin_lock_irqsave(&as->lock, flags);
|
|
|
|
|
|
|
|
pte = locate_pte(as, iova, true, &page, &count);
|
|
|
|
pfn = *pte & SMMU_PFN_MASK;
|
|
|
|
WARN_ON(!pfn_valid(pfn));
|
|
|
|
dev_dbg(as->smmu->dev,
|
|
|
|
"iova:%08lx pfn:%08lx asid:%d\n", iova, pfn, as->asid);
|
|
|
|
|
|
|
|
spin_unlock_irqrestore(&as->lock, flags);
|
|
|
|
return PFN_PHYS(pfn);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int smmu_iommu_domain_has_cap(struct iommu_domain *domain,
|
|
|
|
unsigned long cap)
|
|
|
|
{
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int smmu_iommu_attach_dev(struct iommu_domain *domain,
|
|
|
|
struct device *dev)
|
|
|
|
{
|
|
|
|
struct smmu_as *as = domain->priv;
|
|
|
|
struct smmu_device *smmu = as->smmu;
|
|
|
|
struct smmu_client *client, *c;
|
|
|
|
u32 map;
|
|
|
|
int err;
|
|
|
|
|
|
|
|
client = devm_kzalloc(smmu->dev, sizeof(*c), GFP_KERNEL);
|
|
|
|
if (!client)
|
|
|
|
return -ENOMEM;
|
|
|
|
client->dev = dev;
|
|
|
|
client->as = as;
|
|
|
|
map = (unsigned long)dev->platform_data;
|
|
|
|
if (!map)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
err = smmu_client_enable_hwgrp(client, map);
|
|
|
|
if (err)
|
|
|
|
goto err_hwgrp;
|
|
|
|
|
|
|
|
spin_lock(&as->client_lock);
|
|
|
|
list_for_each_entry(c, &as->client, list) {
|
|
|
|
if (c->dev == dev) {
|
|
|
|
dev_err(smmu->dev,
|
|
|
|
"%s is already attached\n", dev_name(c->dev));
|
|
|
|
err = -EINVAL;
|
|
|
|
goto err_client;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
list_add(&client->list, &as->client);
|
|
|
|
spin_unlock(&as->client_lock);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Reserve "page zero" for AVP vectors using a common dummy
|
|
|
|
* page.
|
|
|
|
*/
|
|
|
|
if (map & HWG_AVPC) {
|
|
|
|
struct page *page;
|
|
|
|
|
|
|
|
page = as->smmu->avp_vector_page;
|
|
|
|
__smmu_iommu_map_pfn(as, 0, page_to_pfn(page));
|
|
|
|
|
|
|
|
pr_info("Reserve \"page zero\" for AVP vectors using a common dummy\n");
|
|
|
|
}
|
|
|
|
|
2012-04-13 04:18:30 -06:00
|
|
|
dev_dbg(smmu->dev, "%s is attached\n", dev_name(dev));
|
2011-11-16 22:31:31 -07:00
|
|
|
return 0;
|
|
|
|
|
|
|
|
err_client:
|
|
|
|
smmu_client_disable_hwgrp(client);
|
|
|
|
spin_unlock(&as->client_lock);
|
|
|
|
err_hwgrp:
|
|
|
|
devm_kfree(smmu->dev, client);
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void smmu_iommu_detach_dev(struct iommu_domain *domain,
|
|
|
|
struct device *dev)
|
|
|
|
{
|
|
|
|
struct smmu_as *as = domain->priv;
|
|
|
|
struct smmu_device *smmu = as->smmu;
|
|
|
|
struct smmu_client *c;
|
|
|
|
|
|
|
|
spin_lock(&as->client_lock);
|
|
|
|
|
|
|
|
list_for_each_entry(c, &as->client, list) {
|
|
|
|
if (c->dev == dev) {
|
|
|
|
smmu_client_disable_hwgrp(c);
|
|
|
|
list_del(&c->list);
|
|
|
|
devm_kfree(smmu->dev, c);
|
|
|
|
c->as = NULL;
|
|
|
|
dev_dbg(smmu->dev,
|
|
|
|
"%s is detached\n", dev_name(c->dev));
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
}
|
2012-07-08 05:37:42 -06:00
|
|
|
dev_err(smmu->dev, "Couldn't find %s\n", dev_name(dev));
|
2011-11-16 22:31:31 -07:00
|
|
|
out:
|
|
|
|
spin_unlock(&as->client_lock);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int smmu_iommu_domain_init(struct iommu_domain *domain)
|
|
|
|
{
|
2012-07-02 05:26:38 -06:00
|
|
|
int i, err = -ENODEV;
|
2011-11-16 22:31:31 -07:00
|
|
|
unsigned long flags;
|
|
|
|
struct smmu_as *as;
|
|
|
|
struct smmu_device *smmu = smmu_handle;
|
|
|
|
|
|
|
|
/* Look for a free AS with lock held */
|
|
|
|
for (i = 0; i < smmu->num_as; i++) {
|
2012-07-02 05:26:38 -06:00
|
|
|
as = &smmu->as[i];
|
2012-07-29 23:39:18 -06:00
|
|
|
|
|
|
|
if (as->pdir_page)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
err = alloc_pdir(as);
|
|
|
|
if (!err)
|
|
|
|
goto found;
|
|
|
|
|
2012-07-02 05:26:38 -06:00
|
|
|
if (err != -EAGAIN)
|
|
|
|
break;
|
2011-11-16 22:31:31 -07:00
|
|
|
}
|
2012-07-02 05:26:38 -06:00
|
|
|
if (i == smmu->num_as)
|
|
|
|
dev_err(smmu->dev, "no free AS\n");
|
|
|
|
return err;
|
2011-11-16 22:31:31 -07:00
|
|
|
|
|
|
|
found:
|
2012-07-17 03:47:14 -06:00
|
|
|
spin_lock_irqsave(&smmu->lock, flags);
|
2011-11-16 22:31:31 -07:00
|
|
|
|
|
|
|
/* Update PDIR register */
|
|
|
|
smmu_write(smmu, SMMU_PTB_ASID_CUR(as->asid), SMMU_PTB_ASID);
|
|
|
|
smmu_write(smmu,
|
|
|
|
SMMU_MK_PDIR(as->pdir_page, as->pdir_attr), SMMU_PTB_DATA);
|
|
|
|
FLUSH_SMMU_REGS(smmu);
|
|
|
|
|
2012-07-17 03:47:14 -06:00
|
|
|
spin_unlock_irqrestore(&smmu->lock, flags);
|
2011-11-16 22:31:31 -07:00
|
|
|
|
|
|
|
domain->priv = as;
|
|
|
|
|
2012-01-26 11:40:57 -07:00
|
|
|
domain->geometry.aperture_start = smmu->iovmm_base;
|
|
|
|
domain->geometry.aperture_end = smmu->iovmm_base +
|
|
|
|
smmu->page_count * SMMU_PAGE_SIZE - 1;
|
|
|
|
domain->geometry.force_aperture = true;
|
|
|
|
|
2011-11-16 22:31:31 -07:00
|
|
|
dev_dbg(smmu->dev, "smmu_as@%p\n", as);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void smmu_iommu_domain_destroy(struct iommu_domain *domain)
|
|
|
|
{
|
|
|
|
struct smmu_as *as = domain->priv;
|
|
|
|
struct smmu_device *smmu = as->smmu;
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
spin_lock_irqsave(&as->lock, flags);
|
|
|
|
|
|
|
|
if (as->pdir_page) {
|
|
|
|
spin_lock(&smmu->lock);
|
|
|
|
smmu_write(smmu, SMMU_PTB_ASID_CUR(as->asid), SMMU_PTB_ASID);
|
|
|
|
smmu_write(smmu, SMMU_PTB_DATA_RESET_VAL, SMMU_PTB_DATA);
|
|
|
|
FLUSH_SMMU_REGS(smmu);
|
|
|
|
spin_unlock(&smmu->lock);
|
|
|
|
|
|
|
|
free_pdir(as);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!list_empty(&as->client)) {
|
|
|
|
struct smmu_client *c;
|
|
|
|
|
|
|
|
list_for_each_entry(c, &as->client, list)
|
|
|
|
smmu_iommu_detach_dev(domain, c->dev);
|
|
|
|
}
|
|
|
|
|
|
|
|
spin_unlock_irqrestore(&as->lock, flags);
|
|
|
|
|
|
|
|
domain->priv = NULL;
|
|
|
|
dev_dbg(smmu->dev, "smmu_as@%p\n", as);
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct iommu_ops smmu_iommu_ops = {
|
|
|
|
.domain_init = smmu_iommu_domain_init,
|
|
|
|
.domain_destroy = smmu_iommu_domain_destroy,
|
|
|
|
.attach_dev = smmu_iommu_attach_dev,
|
|
|
|
.detach_dev = smmu_iommu_detach_dev,
|
|
|
|
.map = smmu_iommu_map,
|
|
|
|
.unmap = smmu_iommu_unmap,
|
|
|
|
.iova_to_phys = smmu_iommu_iova_to_phys,
|
|
|
|
.domain_has_cap = smmu_iommu_domain_has_cap,
|
|
|
|
.pgsize_bitmap = SMMU_IOMMU_PGSIZES,
|
|
|
|
};
|
|
|
|
|
|
|
|
static int tegra_smmu_suspend(struct device *dev)
|
|
|
|
{
|
|
|
|
struct smmu_device *smmu = dev_get_drvdata(dev);
|
|
|
|
|
|
|
|
smmu->translation_enable_0 = smmu_read(smmu, SMMU_TRANSLATION_ENABLE_0);
|
|
|
|
smmu->translation_enable_1 = smmu_read(smmu, SMMU_TRANSLATION_ENABLE_1);
|
|
|
|
smmu->translation_enable_2 = smmu_read(smmu, SMMU_TRANSLATION_ENABLE_2);
|
|
|
|
smmu->asid_security = smmu_read(smmu, SMMU_ASID_SECURITY);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int tegra_smmu_resume(struct device *dev)
|
|
|
|
{
|
|
|
|
struct smmu_device *smmu = dev_get_drvdata(dev);
|
|
|
|
unsigned long flags;
|
2012-06-25 05:23:55 -06:00
|
|
|
int err;
|
2011-11-16 22:31:31 -07:00
|
|
|
|
|
|
|
spin_lock_irqsave(&smmu->lock, flags);
|
2012-06-25 05:23:55 -06:00
|
|
|
err = smmu_setup_regs(smmu);
|
2011-11-16 22:31:31 -07:00
|
|
|
spin_unlock_irqrestore(&smmu->lock, flags);
|
2012-06-25 05:23:55 -06:00
|
|
|
return err;
|
2011-11-16 22:31:31 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
static int tegra_smmu_probe(struct platform_device *pdev)
|
|
|
|
{
|
|
|
|
struct smmu_device *smmu;
|
|
|
|
struct device *dev = &pdev->dev;
|
2012-06-25 05:23:55 -06:00
|
|
|
int i, asids, err = 0;
|
2012-06-25 05:23:58 -06:00
|
|
|
dma_addr_t uninitialized_var(base);
|
|
|
|
size_t bytes, uninitialized_var(size);
|
2011-11-16 22:31:31 -07:00
|
|
|
|
|
|
|
if (smmu_handle)
|
|
|
|
return -EIO;
|
|
|
|
|
|
|
|
BUILD_BUG_ON(PAGE_SHIFT != SMMU_PAGE_SHIFT);
|
|
|
|
|
2012-06-25 05:23:56 -06:00
|
|
|
if (of_property_read_u32(dev->of_node, "nvidia,#asids", &asids))
|
2011-11-16 22:31:31 -07:00
|
|
|
return -ENODEV;
|
|
|
|
|
2012-06-25 05:23:56 -06:00
|
|
|
bytes = sizeof(*smmu) + asids * sizeof(*smmu->as);
|
|
|
|
smmu = devm_kzalloc(dev, bytes, GFP_KERNEL);
|
2011-11-16 22:31:31 -07:00
|
|
|
if (!smmu) {
|
|
|
|
dev_err(dev, "failed to allocate smmu_device\n");
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
|
2012-06-25 05:23:55 -06:00
|
|
|
for (i = 0; i < ARRAY_SIZE(smmu->regs); i++) {
|
|
|
|
struct resource *res;
|
|
|
|
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, i);
|
|
|
|
if (!res)
|
|
|
|
return -ENODEV;
|
|
|
|
smmu->regs[i] = devm_request_and_ioremap(&pdev->dev, res);
|
|
|
|
if (!smmu->regs[i])
|
|
|
|
return -EBUSY;
|
2011-11-16 22:31:31 -07:00
|
|
|
}
|
|
|
|
|
2012-06-25 05:23:55 -06:00
|
|
|
err = of_get_dma_window(dev->of_node, NULL, 0, NULL, &base, &size);
|
|
|
|
if (err)
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
if (size & SMMU_PAGE_MASK)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
size >>= SMMU_PAGE_SHIFT;
|
|
|
|
if (!size)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
smmu->ahb = of_parse_phandle(dev->of_node, "nvidia,ahb", 0);
|
|
|
|
if (!smmu->ahb)
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
smmu->dev = dev;
|
|
|
|
smmu->num_as = asids;
|
|
|
|
smmu->iovmm_base = base;
|
|
|
|
smmu->page_count = size;
|
|
|
|
|
2011-11-16 22:31:31 -07:00
|
|
|
smmu->translation_enable_0 = ~0;
|
|
|
|
smmu->translation_enable_1 = ~0;
|
|
|
|
smmu->translation_enable_2 = ~0;
|
|
|
|
smmu->asid_security = 0;
|
|
|
|
|
|
|
|
for (i = 0; i < smmu->num_as; i++) {
|
|
|
|
struct smmu_as *as = &smmu->as[i];
|
|
|
|
|
|
|
|
as->smmu = smmu;
|
|
|
|
as->asid = i;
|
|
|
|
as->pdir_attr = _PDIR_ATTR;
|
|
|
|
as->pde_attr = _PDE_ATTR;
|
|
|
|
as->pte_attr = _PTE_ATTR;
|
|
|
|
|
|
|
|
spin_lock_init(&as->lock);
|
|
|
|
INIT_LIST_HEAD(&as->client);
|
|
|
|
}
|
|
|
|
spin_lock_init(&smmu->lock);
|
2012-06-25 05:23:55 -06:00
|
|
|
err = smmu_setup_regs(smmu);
|
|
|
|
if (err)
|
2012-06-25 05:23:57 -06:00
|
|
|
return err;
|
2011-11-16 22:31:31 -07:00
|
|
|
platform_set_drvdata(pdev, smmu);
|
|
|
|
|
|
|
|
smmu->avp_vector_page = alloc_page(GFP_KERNEL);
|
|
|
|
if (!smmu->avp_vector_page)
|
2012-06-25 05:23:57 -06:00
|
|
|
return -ENOMEM;
|
2011-11-16 22:31:31 -07:00
|
|
|
|
|
|
|
smmu_handle = smmu;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int tegra_smmu_remove(struct platform_device *pdev)
|
|
|
|
{
|
|
|
|
struct smmu_device *smmu = platform_get_drvdata(pdev);
|
2012-06-25 05:23:57 -06:00
|
|
|
int i;
|
2011-11-16 22:31:31 -07:00
|
|
|
|
|
|
|
smmu_write(smmu, SMMU_CONFIG_DISABLE, SMMU_CONFIG);
|
2012-06-25 05:23:57 -06:00
|
|
|
for (i = 0; i < smmu->num_as; i++)
|
|
|
|
free_pdir(&smmu->as[i]);
|
|
|
|
__free_page(smmu->avp_vector_page);
|
2011-11-16 22:31:31 -07:00
|
|
|
smmu_handle = NULL;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
const struct dev_pm_ops tegra_smmu_pm_ops = {
|
|
|
|
.suspend = tegra_smmu_suspend,
|
|
|
|
.resume = tegra_smmu_resume,
|
|
|
|
};
|
|
|
|
|
2012-06-25 05:23:55 -06:00
|
|
|
#ifdef CONFIG_OF
|
|
|
|
static struct of_device_id tegra_smmu_of_match[] __devinitdata = {
|
|
|
|
{ .compatible = "nvidia,tegra30-smmu", },
|
|
|
|
{ },
|
|
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(of, tegra_smmu_of_match);
|
|
|
|
#endif
|
|
|
|
|
2011-11-16 22:31:31 -07:00
|
|
|
static struct platform_driver tegra_smmu_driver = {
|
|
|
|
.probe = tegra_smmu_probe,
|
|
|
|
.remove = tegra_smmu_remove,
|
|
|
|
.driver = {
|
|
|
|
.owner = THIS_MODULE,
|
|
|
|
.name = "tegra-smmu",
|
|
|
|
.pm = &tegra_smmu_pm_ops,
|
2012-06-25 05:23:55 -06:00
|
|
|
.of_match_table = of_match_ptr(tegra_smmu_of_match),
|
2011-11-16 22:31:31 -07:00
|
|
|
},
|
|
|
|
};
|
|
|
|
|
|
|
|
static int __devinit tegra_smmu_init(void)
|
|
|
|
{
|
|
|
|
bus_set_iommu(&platform_bus_type, &smmu_iommu_ops);
|
|
|
|
return platform_driver_register(&tegra_smmu_driver);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void __exit tegra_smmu_exit(void)
|
|
|
|
{
|
|
|
|
platform_driver_unregister(&tegra_smmu_driver);
|
|
|
|
}
|
|
|
|
|
|
|
|
subsys_initcall(tegra_smmu_init);
|
|
|
|
module_exit(tegra_smmu_exit);
|
|
|
|
|
|
|
|
MODULE_DESCRIPTION("IOMMU API for SMMU in Tegra30");
|
|
|
|
MODULE_AUTHOR("Hiroshi DOYU <hdoyu@nvidia.com>");
|
2012-06-25 05:23:55 -06:00
|
|
|
MODULE_ALIAS("platform:tegra-smmu");
|
2011-11-16 22:31:31 -07:00
|
|
|
MODULE_LICENSE("GPL v2");
|