diff options
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/mach-msm/Kconfig | 19 | ||||
| -rw-r--r-- | arch/arm/mach-msm/Makefile | 2 | ||||
| -rw-r--r-- | arch/arm/mach-msm/iommu.c | 731 | ||||
| -rw-r--r-- | arch/arm/mach-msm/iommu_dev.c | 422 |
4 files changed, 1 insertions, 1173 deletions
diff --git a/arch/arm/mach-msm/Kconfig b/arch/arm/mach-msm/Kconfig index 1516896e8d17..888e92502e15 100644 --- a/arch/arm/mach-msm/Kconfig +++ b/arch/arm/mach-msm/Kconfig @@ -148,22 +148,6 @@ config MACH_MSM8960_RUMI3 endmenu -config MSM_IOMMU - bool "MSM IOMMU Support" - depends on ARCH_MSM8X60 || ARCH_MSM8960 - select IOMMU_API - default n - help - Support for the IOMMUs found on certain Qualcomm SOCs. - These IOMMUs allow virtualization of the address space used by most - cores within the multimedia subsystem. - - If unsure, say N here. - -config IOMMU_PGTABLES_L2 - def_bool y - depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n - config MSM_DEBUG_UART int default 1 if MSM_DEBUG_UART1 @@ -205,9 +189,6 @@ config MSM_GPIOMUX config MSM_V2_TLMM bool -config IOMMU_API - bool - config MSM_SCM bool endif diff --git a/arch/arm/mach-msm/Makefile b/arch/arm/mach-msm/Makefile index 9519fd28a025..b70658c5ae00 100644 --- a/arch/arm/mach-msm/Makefile +++ b/arch/arm/mach-msm/Makefile @@ -3,7 +3,7 @@ obj-y += clock.o obj-$(CONFIG_DEBUG_FS) += clock-debug.o obj-$(CONFIG_MSM_VIC) += irq-vic.o -obj-$(CONFIG_MSM_IOMMU) += iommu.o iommu_dev.o devices-iommu.o +obj-$(CONFIG_MSM_IOMMU) += devices-iommu.o obj-$(CONFIG_ARCH_MSM7X00A) += dma.o irq.o acpuclock-arm11.o obj-$(CONFIG_ARCH_MSM7X30) += dma.o diff --git a/arch/arm/mach-msm/iommu.c b/arch/arm/mach-msm/iommu.c deleted file mode 100644 index 1a584e077c61..000000000000 --- a/arch/arm/mach-msm/iommu.c +++ /dev/null @@ -1,731 +0,0 @@ -/* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 and - * only version 2 as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA. - */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/platform_device.h> -#include <linux/errno.h> -#include <linux/io.h> -#include <linux/interrupt.h> -#include <linux/list.h> -#include <linux/spinlock.h> -#include <linux/slab.h> -#include <linux/iommu.h> -#include <linux/clk.h> - -#include <asm/cacheflush.h> -#include <asm/sizes.h> - -#include <mach/iommu_hw-8xxx.h> -#include <mach/iommu.h> - -#define MRC(reg, processor, op1, crn, crm, op2) \ -__asm__ __volatile__ ( \ -" mrc " #processor "," #op1 ", %0," #crn "," #crm "," #op2 "\n" \ -: "=r" (reg)) - -#define RCP15_PRRR(reg) MRC(reg, p15, 0, c10, c2, 0) -#define RCP15_NMRR(reg) MRC(reg, p15, 0, c10, c2, 1) - -static int msm_iommu_tex_class[4]; - -DEFINE_SPINLOCK(msm_iommu_lock); - -struct msm_priv { - unsigned long *pgtable; - struct list_head list_attached; -}; - -static int __enable_clocks(struct msm_iommu_drvdata *drvdata) -{ - int ret; - - ret = clk_enable(drvdata->pclk); - if (ret) - goto fail; - - if (drvdata->clk) { - ret = clk_enable(drvdata->clk); - if (ret) - clk_disable(drvdata->pclk); - } -fail: - return ret; -} - -static void __disable_clocks(struct msm_iommu_drvdata *drvdata) -{ - if (drvdata->clk) - clk_disable(drvdata->clk); - clk_disable(drvdata->pclk); -} - -static int __flush_iotlb(struct iommu_domain *domain) -{ - struct msm_priv *priv = domain->priv; - struct msm_iommu_drvdata *iommu_drvdata; - struct msm_iommu_ctx_drvdata *ctx_drvdata; - int ret = 0; -#ifndef CONFIG_IOMMU_PGTABLES_L2 - unsigned long *fl_table = priv->pgtable; - int i; - - if (!list_empty(&priv->list_attached)) { - dmac_flush_range(fl_table, fl_table + SZ_16K); - - for (i = 0; i < NUM_FL_PTE; i++) - if ((fl_table[i] & 0x03) == FL_TYPE_TABLE) { - void *sl_table = __va(fl_table[i] & - FL_BASE_MASK); - dmac_flush_range(sl_table, sl_table + SZ_4K); - } - } -#endif - - list_for_each_entry(ctx_drvdata, &priv->list_attached, attached_elm) { - if (!ctx_drvdata->pdev || !ctx_drvdata->pdev->dev.parent) - BUG(); - - iommu_drvdata = dev_get_drvdata(ctx_drvdata->pdev->dev.parent); - BUG_ON(!iommu_drvdata); - - ret = __enable_clocks(iommu_drvdata); - if (ret) - goto fail; - - SET_CTX_TLBIALL(iommu_drvdata->base, ctx_drvdata->num, 0); - __disable_clocks(iommu_drvdata); - } -fail: - return ret; -} - -static void __reset_context(void __iomem *base, int ctx) -{ - SET_BPRCOSH(base, ctx, 0); - SET_BPRCISH(base, ctx, 0); - SET_BPRCNSH(base, ctx, 0); - SET_BPSHCFG(base, ctx, 0); - SET_BPMTCFG(base, ctx, 0); - SET_ACTLR(base, ctx, 0); - SET_SCTLR(base, ctx, 0); - SET_FSRRESTORE(base, ctx, 0); - SET_TTBR0(base, ctx, 0); - SET_TTBR1(base, ctx, 0); - SET_TTBCR(base, ctx, 0); - SET_BFBCR(base, ctx, 0); - SET_PAR(base, ctx, 0); - SET_FAR(base, ctx, 0); - SET_CTX_TLBIALL(base, ctx, 0); - SET_TLBFLPTER(base, ctx, 0); - SET_TLBSLPTER(base, ctx, 0); - SET_TLBLKCR(base, ctx, 0); - SET_PRRR(base, ctx, 0); - SET_NMRR(base, ctx, 0); -} - -static void __program_context(void __iomem *base, int ctx, phys_addr_t pgtable) -{ - unsigned int prrr, nmrr; - __reset_context(base, ctx); - - /* Set up HTW mode */ - /* TLB miss configuration: perform HTW on miss */ - SET_TLBMCFG(base, ctx, 0x3); - - /* V2P configuration: HTW for access */ - SET_V2PCFG(base, ctx, 0x3); - - SET_TTBCR(base, ctx, 0); - SET_TTBR0_PA(base, ctx, (pgtable >> 14)); - - /* Invalidate the TLB for this context */ - SET_CTX_TLBIALL(base, ctx, 0); - - /* Set interrupt number to "secure" interrupt */ - SET_IRPTNDX(base, ctx, 0); - - /* Enable context fault interrupt */ - SET_CFEIE(base, ctx, 1); - - /* Stall access on a context fault and let the handler deal with it */ - SET_CFCFG(base, ctx, 1); - - /* Redirect all cacheable requests to L2 slave port. */ - SET_RCISH(base, ctx, 1); - SET_RCOSH(base, ctx, 1); - SET_RCNSH(base, ctx, 1); - - /* Turn on TEX Remap */ - SET_TRE(base, ctx, 1); - - /* Set TEX remap attributes */ - RCP15_PRRR(prrr); - RCP15_NMRR(nmrr); - SET_PRRR(base, ctx, prrr); - SET_NMRR(base, ctx, nmrr); - - /* Turn on BFB prefetch */ - SET_BFBDFE(base, ctx, 1); - -#ifdef CONFIG_IOMMU_PGTABLES_L2 - /* Configure page tables as inner-cacheable and shareable to reduce - * the TLB miss penalty. - */ - SET_TTBR0_SH(base, ctx, 1); - SET_TTBR1_SH(base, ctx, 1); - - SET_TTBR0_NOS(base, ctx, 1); - SET_TTBR1_NOS(base, ctx, 1); - - SET_TTBR0_IRGNH(base, ctx, 0); /* WB, WA */ - SET_TTBR0_IRGNL(base, ctx, 1); - - SET_TTBR1_IRGNH(base, ctx, 0); /* WB, WA */ - SET_TTBR1_IRGNL(base, ctx, 1); - - SET_TTBR0_ORGN(base, ctx, 1); /* WB, WA */ - SET_TTBR1_ORGN(base, ctx, 1); /* WB, WA */ -#endif - - /* Enable the MMU */ - SET_M(base, ctx, 1); -} - -static int msm_iommu_domain_init(struct iommu_domain *domain) -{ - struct msm_priv *priv = kzalloc(sizeof(*priv), GFP_KERNEL); - - if (!priv) - goto fail_nomem; - - INIT_LIST_HEAD(&priv->list_attached); - priv->pgtable = (unsigned long *)__get_free_pages(GFP_KERNEL, - get_order(SZ_16K)); - - if (!priv->pgtable) - goto fail_nomem; - - memset(priv->pgtable, 0, SZ_16K); - domain->priv = priv; - return 0; - -fail_nomem: - kfree(priv); - return -ENOMEM; -} - -static void msm_iommu_domain_destroy(struct iommu_domain *domain) -{ - struct msm_priv *priv; - unsigned long flags; - unsigned long *fl_table; - int i; - - spin_lock_irqsave(&msm_iommu_lock, flags); - priv = domain->priv; - domain->priv = NULL; - - if (priv) { - fl_table = priv->pgtable; - - for (i = 0; i < NUM_FL_PTE; i++) - if ((fl_table[i] & 0x03) == FL_TYPE_TABLE) - free_page((unsigned long) __va(((fl_table[i]) & - FL_BASE_MASK))); - - free_pages((unsigned long)priv->pgtable, get_order(SZ_16K)); - priv->pgtable = NULL; - } - - kfree(priv); - spin_unlock_irqrestore(&msm_iommu_lock, flags); -} - -static int msm_iommu_attach_dev(struct iommu_domain *domain, struct device *dev) -{ - struct msm_priv *priv; - struct msm_iommu_ctx_dev *ctx_dev; - struct msm_iommu_drvdata *iommu_drvdata; - struct msm_iommu_ctx_drvdata *ctx_drvdata; - struct msm_iommu_ctx_drvdata *tmp_drvdata; - int ret = 0; - unsigned long flags; - - spin_lock_irqsave(&msm_iommu_lock, flags); - - priv = domain->priv; - - if (!priv || !dev) { - ret = -EINVAL; - goto fail; - } - - iommu_drvdata = dev_get_drvdata(dev->parent); - ctx_drvdata = dev_get_drvdata(dev); - ctx_dev = dev->platform_data; - - if (!iommu_drvdata || !ctx_drvdata || !ctx_dev) { - ret = -EINVAL; - goto fail; - } - - if (!list_empty(&ctx_drvdata->attached_elm)) { - ret = -EBUSY; - goto fail; - } - - list_for_each_entry(tmp_drvdata, &priv->list_attached, attached_elm) - if (tmp_drvdata == ctx_drvdata) { - ret = -EBUSY; - goto fail; - } - - ret = __enable_clocks(iommu_drvdata); - if (ret) - goto fail; - - __program_context(iommu_drvdata->base, ctx_dev->num, - __pa(priv->pgtable)); - - __disable_clocks(iommu_drvdata); - list_add(&(ctx_drvdata->attached_elm), &priv->list_attached); - ret = __flush_iotlb(domain); - -fail: - spin_unlock_irqrestore(&msm_iommu_lock, flags); - return ret; -} - -static void msm_iommu_detach_dev(struct iommu_domain *domain, - struct device *dev) -{ - struct msm_priv *priv; - struct msm_iommu_ctx_dev *ctx_dev; - struct msm_iommu_drvdata *iommu_drvdata; - struct msm_iommu_ctx_drvdata *ctx_drvdata; - unsigned long flags; - int ret; - - spin_lock_irqsave(&msm_iommu_lock, flags); - priv = domain->priv; - - if (!priv || !dev) - goto fail; - - iommu_drvdata = dev_get_drvdata(dev->parent); - ctx_drvdata = dev_get_drvdata(dev); - ctx_dev = dev->platform_data; - - if (!iommu_drvdata || !ctx_drvdata || !ctx_dev) - goto fail; - - ret = __flush_iotlb(domain); - if (ret) - goto fail; - - ret = __enable_clocks(iommu_drvdata); - if (ret) - goto fail; - - __reset_context(iommu_drvdata->base, ctx_dev->num); - __disable_clocks(iommu_drvdata); - list_del_init(&ctx_drvdata->attached_elm); - -fail: - spin_unlock_irqrestore(&msm_iommu_lock, flags); -} - -static int msm_iommu_map(struct iommu_domain *domain, unsigned long va, - phys_addr_t pa, int order, int prot) -{ - struct msm_priv *priv; - unsigned long flags; - unsigned long *fl_table; - unsigned long *fl_pte; - unsigned long fl_offset; - unsigned long *sl_table; - unsigned long *sl_pte; - unsigned long sl_offset; - unsigned int pgprot; - size_t len = 0x1000UL << order; - int ret = 0, tex, sh; - - spin_lock_irqsave(&msm_iommu_lock, flags); - - sh = (prot & MSM_IOMMU_ATTR_SH) ? 1 : 0; - tex = msm_iommu_tex_class[prot & MSM_IOMMU_CP_MASK]; - - if (tex < 0 || tex > NUM_TEX_CLASS - 1) { - ret = -EINVAL; - goto fail; - } - - priv = domain->priv; - if (!priv) { - ret = -EINVAL; - goto fail; - } - - fl_table = priv->pgtable; - - if (len != SZ_16M && len != SZ_1M && - len != SZ_64K && len != SZ_4K) { - pr_debug("Bad size: %d\n", len); - ret = -EINVAL; - goto fail; - } - - if (!fl_table) { - pr_debug("Null page table\n"); - ret = -EINVAL; - goto fail; - } - - if (len == SZ_16M || len == SZ_1M) { - pgprot = sh ? FL_SHARED : 0; - pgprot |= tex & 0x01 ? FL_BUFFERABLE : 0; - pgprot |= tex & 0x02 ? FL_CACHEABLE : 0; - pgprot |= tex & 0x04 ? FL_TEX0 : 0; - } else { - pgprot = sh ? SL_SHARED : 0; - pgprot |= tex & 0x01 ? SL_BUFFERABLE : 0; - pgprot |= tex & 0x02 ? SL_CACHEABLE : 0; - pgprot |= tex & 0x04 ? SL_TEX0 : 0; - } - - fl_offset = FL_OFFSET(va); /* Upper 12 bits */ - fl_pte = fl_table + fl_offset; /* int pointers, 4 bytes */ - - if (len == SZ_16M) { - int i = 0; - for (i = 0; i < 16; i++) - *(fl_pte+i) = (pa & 0xFF000000) | FL_SUPERSECTION | - FL_AP_READ | FL_AP_WRITE | FL_TYPE_SECT | - FL_SHARED | FL_NG | pgprot; - } - - if (len == SZ_1M) - *fl_pte = (pa & 0xFFF00000) | FL_AP_READ | FL_AP_WRITE | FL_NG | - FL_TYPE_SECT | FL_SHARED | pgprot; - - /* Need a 2nd level table */ - if ((len == SZ_4K || len == SZ_64K) && (*fl_pte) == 0) { - unsigned long *sl; - sl = (unsigned long *) __get_free_pages(GFP_ATOMIC, - get_order(SZ_4K)); - - if (!sl) { - pr_debug("Could not allocate second level table\n"); - ret = -ENOMEM; - goto fail; - } - - memset(sl, 0, SZ_4K); - *fl_pte = ((((int)__pa(sl)) & FL_BASE_MASK) | FL_TYPE_TABLE); - } - - sl_table = (unsigned long *) __va(((*fl_pte) & FL_BASE_MASK)); - sl_offset = SL_OFFSET(va); - sl_pte = sl_table + sl_offset; - - - if (len == SZ_4K) - *sl_pte = (pa & SL_BASE_MASK_SMALL) | SL_AP0 | SL_AP1 | SL_NG | - SL_SHARED | SL_TYPE_SMALL | pgprot; - - if (len == SZ_64K) { - int i; - - for (i = 0; i < 16; i++) - *(sl_pte+i) = (pa & SL_BASE_MASK_LARGE) | SL_AP0 | - SL_NG | SL_AP1 | SL_SHARED | SL_TYPE_LARGE | pgprot; - } - - ret = __flush_iotlb(domain); -fail: - spin_unlock_irqrestore(&msm_iommu_lock, flags); - return ret; -} - -static int msm_iommu_unmap(struct iommu_domain *domain, unsigned long va, - int order) -{ - struct msm_priv *priv; - unsigned long flags; - unsigned long *fl_table; - unsigned long *fl_pte; - unsigned long fl_offset; - unsigned long *sl_table; - unsigned long *sl_pte; - unsigned long sl_offset; - size_t len = 0x1000UL << order; - int i, ret = 0; - - spin_lock_irqsave(&msm_iommu_lock, flags); - - priv = domain->priv; - - if (!priv) { - ret = -ENODEV; - goto fail; - } - - fl_table = priv->pgtable; - - if (len != SZ_16M && len != SZ_1M && - len != SZ_64K && len != SZ_4K) { - pr_debug("Bad length: %d\n", len); - ret = -EINVAL; - goto fail; - } - - if (!fl_table) { - pr_debug("Null page table\n"); - ret = -EINVAL; - goto fail; - } - - fl_offset = FL_OFFSET(va); /* Upper 12 bits */ - fl_pte = fl_table + fl_offset; /* int pointers, 4 bytes */ - - if (*fl_pte == 0) { - pr_debug("First level PTE is 0\n"); - ret = -ENODEV; - goto fail; - } - - /* Unmap supersection */ - if (len == SZ_16M) - for (i = 0; i < 16; i++) - *(fl_pte+i) = 0; - - if (len == SZ_1M) - *fl_pte = 0; - - sl_table = (unsigned long *) __va(((*fl_pte) & FL_BASE_MASK)); - sl_offset = SL_OFFSET(va); - sl_pte = sl_table + sl_offset; - - if (len == SZ_64K) { - for (i = 0; i < 16; i++) - *(sl_pte+i) = 0; - } - - if (len == SZ_4K) - *sl_pte = 0; - - if (len == SZ_4K || len == SZ_64K) { - int used = 0; - - for (i = 0; i < NUM_SL_PTE; i++) - if (sl_table[i]) - used = 1; - if (!used) { - free_page((unsigned long)sl_table); - *fl_pte = 0; - } - } - - ret = __flush_iotlb(domain); -fail: - spin_unlock_irqrestore(&msm_iommu_lock, flags); - return ret; -} - -static phys_addr_t msm_iommu_iova_to_phys(struct iommu_domain *domain, - unsigned long va) -{ - struct msm_priv *priv; - struct msm_iommu_drvdata *iommu_drvdata; - struct msm_iommu_ctx_drvdata *ctx_drvdata; - unsigned int par; - unsigned long flags; - void __iomem *base; - phys_addr_t ret = 0; - int ctx; - - spin_lock_irqsave(&msm_iommu_lock, flags); - - priv = domain->priv; - if (list_empty(&priv->list_attached)) - goto fail; - - ctx_drvdata = list_entry(priv->list_attached.next, - struct msm_iommu_ctx_drvdata, attached_elm); - iommu_drvdata = dev_get_drvdata(ctx_drvdata->pdev->dev.parent); - - base = iommu_drvdata->base; - ctx = ctx_drvdata->num; - - ret = __enable_clocks(iommu_drvdata); - if (ret) - goto fail; - - /* Invalidate context TLB */ - SET_CTX_TLBIALL(base, ctx, 0); - SET_V2PPR(base, ctx, va & V2Pxx_VA); - - par = GET_PAR(base, ctx); - - /* We are dealing with a supersection */ - if (GET_NOFAULT_SS(base, ctx)) - ret = (par & 0xFF000000) | (va & 0x00FFFFFF); - else /* Upper 20 bits from PAR, lower 12 from VA */ - ret = (par & 0xFFFFF000) | (va & 0x00000FFF); - - if (GET_FAULT(base, ctx)) - ret = 0; - - __disable_clocks(iommu_drvdata); -fail: - spin_unlock_irqrestore(&msm_iommu_lock, flags); - return ret; -} - -static int msm_iommu_domain_has_cap(struct iommu_domain *domain, - unsigned long cap) -{ - return 0; -} - -static void print_ctx_regs(void __iomem *base, int ctx) -{ - unsigned int fsr = GET_FSR(base, ctx); - pr_err("FAR = %08x PAR = %08x\n", - GET_FAR(base, ctx), GET_PAR(base, ctx)); - pr_err("FSR = %08x [%s%s%s%s%s%s%s%s%s%s]\n", fsr, - (fsr & 0x02) ? "TF " : "", - (fsr & 0x04) ? "AFF " : "", - (fsr & 0x08) ? "APF " : "", - (fsr & 0x10) ? "TLBMF " : "", - (fsr & 0x20) ? "HTWDEEF " : "", - (fsr & 0x40) ? "HTWSEEF " : "", - (fsr & 0x80) ? "MHF " : "", - (fsr & 0x10000) ? "SL " : "", - (fsr & 0x40000000) ? "SS " : "", - (fsr & 0x80000000) ? "MULTI " : ""); - - pr_err("FSYNR0 = %08x FSYNR1 = %08x\n", - GET_FSYNR0(base, ctx), GET_FSYNR1(base, ctx)); - pr_err("TTBR0 = %08x TTBR1 = %08x\n", - GET_TTBR0(base, ctx), GET_TTBR1(base, ctx)); - pr_err("SCTLR = %08x ACTLR = %08x\n", - GET_SCTLR(base, ctx), GET_ACTLR(base, ctx)); - pr_err("PRRR = %08x NMRR = %08x\n", - GET_PRRR(base, ctx), GET_NMRR(base, ctx)); -} - -irqreturn_t msm_iommu_fault_handler(int irq, void *dev_id) -{ - struct msm_iommu_drvdata *drvdata = dev_id; - void __iomem *base; - unsigned int fsr; - int i, ret; - - spin_lock(&msm_iommu_lock); - - if (!drvdata) { - pr_err("Invalid device ID in context interrupt handler\n"); - goto fail; - } - - base = drvdata->base; - - pr_err("Unexpected IOMMU page fault!\n"); - pr_err("base = %08x\n", (unsigned int) base); - - ret = __enable_clocks(drvdata); - if (ret) - goto fail; - - for (i = 0; i < drvdata->ncb; i++) { - fsr = GET_FSR(base, i); - if (fsr) { - pr_err("Fault occurred in context %d.\n", i); - pr_err("Interesting registers:\n"); - print_ctx_regs(base, i); - SET_FSR(base, i, 0x4000000F); - } - } - __disable_clocks(drvdata); -fail: - spin_unlock(&msm_iommu_lock); - return 0; -} - -static struct iommu_ops msm_iommu_ops = { - .domain_init = msm_iommu_domain_init, - .domain_destroy = msm_iommu_domain_destroy, - .attach_dev = msm_iommu_attach_dev, - .detach_dev = msm_iommu_detach_dev, - .map = msm_iommu_map, - .unmap = msm_iommu_unmap, - .iova_to_phys = msm_iommu_iova_to_phys, - .domain_has_cap = msm_iommu_domain_has_cap -}; - -static int __init get_tex_class(int icp, int ocp, int mt, int nos) -{ - int i = 0; - unsigned int prrr = 0; - unsigned int nmrr = 0; - int c_icp, c_ocp, c_mt, c_nos; - - RCP15_PRRR(prrr); - RCP15_NMRR(nmrr); - - for (i = 0; i < NUM_TEX_CLASS; i++) { - c_nos = PRRR_NOS(prrr, i); - c_mt = PRRR_MT(prrr, i); - c_icp = NMRR_ICP(nmrr, i); - c_ocp = NMRR_OCP(nmrr, i); - - if (icp == c_icp && ocp == c_ocp && c_mt == mt && c_nos == nos) - return i; - } - - return -ENODEV; -} - -static void __init setup_iommu_tex_classes(void) -{ - msm_iommu_tex_class[MSM_IOMMU_ATTR_NONCACHED] = - get_tex_class(CP_NONCACHED, CP_NONCACHED, MT_NORMAL, 1); - - msm_iommu_tex_class[MSM_IOMMU_ATTR_CACHED_WB_WA] = - get_tex_class(CP_WB_WA, CP_WB_WA, MT_NORMAL, 1); - - msm_iommu_tex_class[MSM_IOMMU_ATTR_CACHED_WB_NWA] = - get_tex_class(CP_WB_NWA, CP_WB_NWA, MT_NORMAL, 1); - - msm_iommu_tex_class[MSM_IOMMU_ATTR_CACHED_WT] = - get_tex_class(CP_WT, CP_WT, MT_NORMAL, 1); -} - -static int __init msm_iommu_init(void) -{ - setup_iommu_tex_classes(); - register_iommu(&msm_iommu_ops); - return 0; -} - -subsys_initcall(msm_iommu_init); - -MODULE_LICENSE("GPL v2"); -MODULE_AUTHOR("Stepan Moskovchenko <stepanm@codeaurora.org>"); diff --git a/arch/arm/mach-msm/iommu_dev.c b/arch/arm/mach-msm/iommu_dev.c deleted file mode 100644 index 8e8fb079852d..000000000000 --- a/arch/arm/mach-msm/iommu_dev.c +++ /dev/null @@ -1,422 +0,0 @@ -/* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 and - * only version 2 as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA. - */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/platform_device.h> -#include <linux/io.h> -#include <linux/clk.h> -#include <linux/iommu.h> -#include <linux/interrupt.h> -#include <linux/err.h> -#include <linux/slab.h> - -#include <mach/iommu_hw-8xxx.h> -#include <mach/iommu.h> -#include <mach/clk.h> - -struct iommu_ctx_iter_data { - /* input */ - const char *name; - - /* output */ - struct device *dev; -}; - -static struct platform_device *msm_iommu_root_dev; - -static int each_iommu_ctx(struct device *dev, void *data) -{ - struct iommu_ctx_iter_data *res = data; - struct msm_iommu_ctx_dev *c = dev->platform_data; - - if (!res || !c || !c->name || !res->name) - return -EINVAL; - - if (!strcmp(res->name, c->name)) { - res->dev = dev; - return 1; - } - return 0; -} - -static int each_iommu(struct device *dev, void *data) -{ - return device_for_each_child(dev, data, each_iommu_ctx); -} - -struct device *msm_iommu_get_ctx(const char *ctx_name) -{ - struct iommu_ctx_iter_data r; - int found; - - if (!msm_iommu_root_dev) { - pr_err("No root IOMMU device.\n"); - goto fail; - } - - r.name = ctx_name; - found = device_for_each_child(&msm_iommu_root_dev->dev, &r, each_iommu); - - if (!found) { - pr_err("Could not find context <%s>\n", ctx_name); - goto fail; - } - - return r.dev; -fail: - return NULL; -} -EXPORT_SYMBOL(msm_iommu_get_ctx); - -static void msm_iommu_reset(void __iomem *base, int ncb) -{ - int ctx; - - SET_RPUE(base, 0); - SET_RPUEIE(base, 0); - SET_ESRRESTORE(base, 0); - SET_TBE(base, 0); - SET_CR(base, 0); - SET_SPDMBE(base, 0); - SET_TESTBUSCR(base, 0); - SET_TLBRSW(base, 0); - SET_GLOBAL_TLBIALL(base, 0); - SET_RPU_ACR(base, 0); - SET_TLBLKCRWE(base, 1); - - for (ctx = 0; ctx < ncb; ctx++) { - SET_BPRCOSH(base, ctx, 0); - SET_BPRCISH(base, ctx, 0); - SET_BPRCNSH(base, ctx, 0); - SET_BPSHCFG(base, ctx, 0); - SET_BPMTCFG(base, ctx, 0); - SET_ACTLR(base, ctx, 0); - SET_SCTLR(base, ctx, 0); - SET_FSRRESTORE(base, ctx, 0); - SET_TTBR0(base, ctx, 0); - SET_TTBR1(base, ctx, 0); - SET_TTBCR(base, ctx, 0); - SET_BFBCR(base, ctx, 0); - SET_PAR(base, ctx, 0); - SET_FAR(base, ctx, 0); - SET_CTX_TLBIALL(base, ctx, 0); - SET_TLBFLPTER(base, ctx, 0); - SET_TLBSLPTER(base, ctx, 0); - SET_TLBLKCR(base, ctx, 0); - SET_PRRR(base, ctx, 0); - SET_NMRR(base, ctx, 0); - SET_CONTEXTIDR(base, ctx, 0); - } -} - -static int msm_iommu_probe(struct platform_device *pdev) -{ - struct resource *r, *r2; - struct clk *iommu_clk; - struct clk *iommu_pclk; - struct msm_iommu_drvdata *drvdata; - struct msm_iommu_dev *iommu_dev = pdev->dev.platform_data; - void __iomem *regs_base; - resource_size_t len; - int ret, irq, par; - - if (pdev->id == -1) { - msm_iommu_root_dev = pdev; - return 0; - } - - drvdata = kzalloc(sizeof(*drvdata), GFP_KERNEL); - - if (!drvdata) { - ret = -ENOMEM; - goto fail; - } - - if (!iommu_dev) { - ret = -ENODEV; - goto fail; - } - - iommu_pclk = clk_get(NULL, "smmu_pclk"); - if (IS_ERR(iommu_pclk)) { - ret = -ENODEV; - goto fail; - } - - ret = clk_enable(iommu_pclk); - if (ret) - goto fail_enable; - - iommu_clk = clk_get(&pdev->dev, "iommu_clk"); - - if (!IS_ERR(iommu_clk)) { - if (clk_get_rate(iommu_clk) == 0) - clk_set_min_rate(iommu_clk, 1); - - ret = clk_enable(iommu_clk); - if (ret) { - clk_put(iommu_clk); - goto fail_pclk; - } - } else - iommu_clk = NULL; - - r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "physbase"); - - if (!r) { - ret = -ENODEV; - goto fail_clk; - } - - len = resource_size(r); - - r2 = request_mem_region(r->start, len, r->name); - if (!r2) { - pr_err("Could not request memory region: start=%p, len=%d\n", - (void *) r->start, len); - ret = -EBUSY; - goto fail_clk; - } - - regs_base = ioremap(r2->start, len); - - if (!regs_base) { - pr_err("Could not ioremap: start=%p, len=%d\n", - (void *) r2->start, len); - ret = -EBUSY; - goto fail_mem; - } - - irq = platform_get_irq_byname(pdev, "secure_irq"); - if (irq < 0) { - ret = -ENODEV; - goto fail_io; - } - - msm_iommu_reset(regs_base, iommu_dev->ncb); - - SET_M(regs_base, 0, 1); - SET_PAR(regs_base, 0, 0); - SET_V2PCFG(regs_base, 0, 1); - SET_V2PPR(regs_base, 0, 0); - par = GET_PAR(regs_base, 0); - SET_V2PCFG(regs_base, 0, 0); - SET_M(regs_base, 0, 0); - - if (!par) { - pr_err("%s: Invalid PAR value detected\n", iommu_dev->name); - ret = -ENODEV; - goto fail_io; - } - - ret = request_irq(irq, msm_iommu_fault_handler, 0, - "msm_iommu_secure_irpt_handler", drvdata); - if (ret) { - pr_err("Request IRQ %d failed with ret=%d\n", irq, ret); - goto fail_io; - } - - - drvdata->pclk = iommu_pclk; - drvdata->clk = iommu_clk; - drvdata->base = regs_base; - drvdata->irq = irq; - drvdata->ncb = iommu_dev->ncb; - - pr_info("device %s mapped at %p, irq %d with %d ctx banks\n", - iommu_dev->name, regs_base, irq, iommu_dev->ncb); - - platform_set_drvdata(pdev, drvdata); - - if (iommu_clk) - clk_disable(iommu_clk); - - clk_disable(iommu_pclk); - - return 0; -fail_io: - iounmap(regs_base); -fail_mem: - release_mem_region(r->start, len); -fail_clk: - if (iommu_clk) { - clk_disable(iommu_clk); - clk_put(iommu_clk); - } -fail_pclk: - clk_disable(iommu_pclk); -fail_enable: - clk_put(iommu_pclk); -fail: - kfree(drvdata); - return ret; -} - -static int msm_iommu_remove(struct platform_device *pdev) -{ - struct msm_iommu_drvdata *drv = NULL; - - drv = platform_get_drvdata(pdev); - if (drv) { - if (drv->clk) - clk_put(drv->clk); - clk_put(drv->pclk); - memset(drv, 0, sizeof(*drv)); - kfree(drv); - platform_set_drvdata(pdev, NULL); - } - return 0; -} - -static int msm_iommu_ctx_probe(struct platform_device *pdev) -{ - struct msm_iommu_ctx_dev *c = pdev->dev.platform_data; - struct msm_iommu_drvdata *drvdata; - struct msm_iommu_ctx_drvdata *ctx_drvdata = NULL; - int i, ret; - if (!c || !pdev->dev.parent) { - ret = -EINVAL; - goto fail; - } - - drvdata = dev_get_drvdata(pdev->dev.parent); - - if (!drvdata) { - ret = -ENODEV; - goto fail; - } - - ctx_drvdata = kzalloc(sizeof(*ctx_drvdata), GFP_KERNEL); - if (!ctx_drvdata) { - ret = -ENOMEM; - goto fail; - } - ctx_drvdata->num = c->num; - ctx_drvdata->pdev = pdev; - - INIT_LIST_HEAD(&ctx_drvdata->attached_elm); - platform_set_drvdata(pdev, ctx_drvdata); - - ret = clk_enable(drvdata->pclk); - if (ret) - goto fail; - - if (drvdata->clk) { - ret = clk_enable(drvdata->clk); - if (ret) { - clk_disable(drvdata->pclk); - goto fail; - } - } - - /* Program the M2V tables for this context */ - for (i = 0; i < MAX_NUM_MIDS; i++) { - int mid = c->mids[i]; - if (mid == -1) - break; - - SET_M2VCBR_N(drvdata->base, mid, 0); - SET_CBACR_N(drvdata->base, c->num, 0); - - /* Set VMID = 0 */ - SET_VMID(drvdata->base, mid, 0); - - /* Set the context number for that MID to this context */ - SET_CBNDX(drvdata->base, mid, c->num); - - /* Set MID associated with this context bank to 0*/ - SET_CBVMID(drvdata->base, c->num, 0); - - /* Set the ASID for TLB tagging for this context */ - SET_CONTEXTIDR_ASID(drvdata->base, c->num, c->num); - - /* Set security bit override to be Non-secure */ - SET_NSCFG(drvdata->base, mid, 3); - } - - if (drvdata->clk) - clk_disable(drvdata->clk); - clk_disable(drvdata->pclk); - - dev_info(&pdev->dev, "context %s using bank %d\n", c->name, c->num); - return 0; -fail: - kfree(ctx_drvdata); - return ret; -} - -static int msm_iommu_ctx_remove(struct platform_device *pdev) -{ - struct msm_iommu_ctx_drvdata *drv = NULL; - drv = platform_get_drvdata(pdev); - if (drv) { - memset(drv, 0, sizeof(struct msm_iommu_ctx_drvdata)); - kfree(drv); - platform_set_drvdata(pdev, NULL); - } - return 0; -} - -static struct platform_driver msm_iommu_driver = { - .driver = { - .name = "msm_iommu", - }, - .probe = msm_iommu_probe, - .remove = msm_iommu_remove, -}; - -static struct platform_driver msm_iommu_ctx_driver = { - .driver = { - .name = "msm_iommu_ctx", - }, - .probe = msm_iommu_ctx_probe, - .remove = msm_iommu_ctx_remove, -}; - -static int __init msm_iommu_driver_init(void) -{ - int ret; - ret = platform_driver_register(&msm_iommu_driver); - if (ret != 0) { - pr_err("Failed to register IOMMU driver\n"); - goto error; - } - - ret = platform_driver_register(&msm_iommu_ctx_driver); - if (ret != 0) { - pr_err("Failed to register IOMMU context driver\n"); - goto error; - } - -error: - return ret; -} - -static void __exit msm_iommu_driver_exit(void) -{ - platform_driver_unregister(&msm_iommu_ctx_driver); - platform_driver_unregister(&msm_iommu_driver); -} - -subsys_initcall(msm_iommu_driver_init); -module_exit(msm_iommu_driver_exit); - -MODULE_LICENSE("GPL v2"); -MODULE_AUTHOR("Stepan Moskovchenko <stepanm@codeaurora.org>"); |