Merge commit 'AU_LINUX_ANDROID_ICS.04.00.04.00.126' into msm-3.4
AU_LINUX_ANDROID_ICS.04.00.04.00.126 from msm-3.0.
First parent is from google/android-3.4.
* commit 'AU_LINUX_ANDROID_ICS.04.00.04.00.126': (8712 commits)
PRNG: Device tree entry for qrng device.
vidc:1080p: Set video core timeout value for Thumbnail mode
msm: sps: improve the debugging support in SPS driver
board-8064 msm: Overlap secure and non secure video firmware heaps.
msm: clock: Add handoff ops for 7x30 and copper XO clocks
msm_fb: display: Wait for external vsync before DTV IOMMU unmap
msm: Fix ciruclar dependency in debug UART settings
msm: gdsc: Add GDSC regulator driver for msm-copper
defconfig: Enable Mobicore Driver.
mobicore: Add mobicore driver.
mobicore: rename variable to lower case.
mobicore: rename folder.
mobicore: add makefiles
mobicore: initial import of kernel driver
ASoC: msm: Add SLIMBUS_2_RX CPU DAI
board-8064-gpio: Update FUNC for EPM SPI CS
msm_fb: display: Remove chicken bit config during video playback
mmc: msm_sdcc: enable the sanitize capability
msm-fb: display: lm2 writeback support on mpq platfroms
msm_fb: display: Disable LVDS phy & pll during panel off
...
Signed-off-by: Steve Muckle <smuckle@codeaurora.org>
diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig
index 3bd9fff..84a69bf 100644
--- a/drivers/iommu/Kconfig
+++ b/drivers/iommu/Kconfig
@@ -16,7 +16,7 @@
# MSM IOMMU support
config MSM_IOMMU
bool "MSM IOMMU Support"
- depends on ARCH_MSM8X60 || ARCH_MSM8960
+ depends on ARCH_MSM8X60 || ARCH_MSM8960 || ARCH_APQ8064 || ARCH_MSMCOPPER
select IOMMU_API
help
Support for the IOMMUs found on certain Qualcomm SOCs.
@@ -26,8 +26,14 @@
If unsure, say N here.
config IOMMU_PGTABLES_L2
- def_bool y
+ bool "Allow SMMU page tables in the L2 cache (Experimental)"
depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n
+ default y
+ help
+ Improves TLB miss latency at the expense of potential L2 pollution.
+ However, with large multimedia buffers, the TLB should mostly contain
+ section mappings and TLB misses should be quite infrequent.
+ Most people can probably say Y here.
# AMD IOMMU support
config AMD_IOMMU
diff --git a/drivers/iommu/Makefile b/drivers/iommu/Makefile
index 7ad7a3b..066bc3e 100644
--- a/drivers/iommu/Makefile
+++ b/drivers/iommu/Makefile
@@ -1,5 +1,8 @@
obj-$(CONFIG_IOMMU_API) += iommu.o
obj-$(CONFIG_MSM_IOMMU) += msm_iommu.o msm_iommu_dev.o
+ifdef CONFIG_OF
+obj-$(CONFIG_MSM_IOMMU) += msm_iommu-v2.o msm_iommu_dev-v2.o msm_iommu_pagetable.o
+endif
obj-$(CONFIG_AMD_IOMMU) += amd_iommu.o amd_iommu_init.o
obj-$(CONFIG_AMD_IOMMU_V2) += amd_iommu_v2.o
obj-$(CONFIG_DMAR_TABLE) += dmar.o
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 2198b2d..ef69d91 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -26,6 +26,7 @@
#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/iommu.h>
+#include <linux/scatterlist.h>
static ssize_t show_iommu_group(struct device *dev,
struct device_attribute *attr, char *buf)
@@ -135,7 +136,7 @@
}
EXPORT_SYMBOL_GPL(iommu_set_fault_handler);
-struct iommu_domain *iommu_domain_alloc(struct bus_type *bus)
+struct iommu_domain *iommu_domain_alloc(struct bus_type *bus, int flags)
{
struct iommu_domain *domain;
int ret;
@@ -149,7 +150,7 @@
domain->ops = bus->iommu_ops;
- ret = domain->ops->domain_init(domain);
+ ret = domain->ops->domain_init(domain, flags);
if (ret)
goto out_free;
@@ -333,6 +334,39 @@
}
EXPORT_SYMBOL_GPL(iommu_unmap);
+int iommu_map_range(struct iommu_domain *domain, unsigned int iova,
+ struct scatterlist *sg, unsigned int len, int prot)
+{
+ if (unlikely(domain->ops->map_range == NULL))
+ return -ENODEV;
+
+ BUG_ON(iova & (~PAGE_MASK));
+
+ return domain->ops->map_range(domain, iova, sg, len, prot);
+}
+EXPORT_SYMBOL_GPL(iommu_map_range);
+
+int iommu_unmap_range(struct iommu_domain *domain, unsigned int iova,
+ unsigned int len)
+{
+ if (unlikely(domain->ops->unmap_range == NULL))
+ return -ENODEV;
+
+ BUG_ON(iova & (~PAGE_MASK));
+
+ return domain->ops->unmap_range(domain, iova, len);
+}
+EXPORT_SYMBOL_GPL(iommu_unmap_range);
+
+phys_addr_t iommu_get_pt_base_addr(struct iommu_domain *domain)
+{
+ if (unlikely(domain->ops->get_pt_base_addr == NULL))
+ return 0;
+
+ return domain->ops->get_pt_base_addr(domain);
+}
+EXPORT_SYMBOL_GPL(iommu_get_pt_base_addr);
+
int iommu_device_group(struct device *dev, unsigned int *groupid)
{
if (iommu_present(dev->bus) && dev->bus->iommu_ops->device_group)
diff --git a/drivers/iommu/msm_iommu-v2.c b/drivers/iommu/msm_iommu-v2.c
new file mode 100644
index 0000000..10d0b66
--- /dev/null
+++ b/drivers/iommu/msm_iommu-v2.c
@@ -0,0 +1,575 @@
+/* Copyright (c) 2012 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.
+ */
+
+#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/mutex.h>
+#include <linux/slab.h>
+#include <linux/iommu.h>
+#include <linux/clk.h>
+#include <linux/scatterlist.h>
+
+#include <asm/sizes.h>
+
+#include <mach/iommu_hw-v2.h>
+#include <mach/iommu.h>
+
+#include "msm_iommu_pagetable.h"
+
+/* bitmap of the page sizes currently supported */
+#define MSM_IOMMU_PGSIZES (SZ_4K | SZ_64K | SZ_1M | SZ_16M)
+
+static DEFINE_MUTEX(msm_iommu_lock);
+
+struct msm_priv {
+ struct iommu_pt pt;
+ struct list_head list_attached;
+};
+
+static int __enable_clocks(struct msm_iommu_drvdata *drvdata)
+{
+ int ret;
+
+ ret = clk_prepare_enable(drvdata->pclk);
+ if (ret)
+ goto fail;
+
+ if (drvdata->clk) {
+ ret = clk_prepare_enable(drvdata->clk);
+ if (ret)
+ clk_disable_unprepare(drvdata->pclk);
+ }
+fail:
+ return ret;
+}
+
+static void __disable_clocks(struct msm_iommu_drvdata *drvdata)
+{
+ if (drvdata->clk)
+ clk_disable_unprepare(drvdata->clk);
+ clk_disable_unprepare(drvdata->pclk);
+}
+
+static int __flush_iotlb_va(struct iommu_domain *domain, unsigned int va)
+{
+ struct msm_priv *priv = domain->priv;
+ struct msm_iommu_drvdata *iommu_drvdata;
+ struct msm_iommu_ctx_drvdata *ctx_drvdata;
+ int asid;
+
+ list_for_each_entry(ctx_drvdata, &priv->list_attached, attached_elm) {
+ BUG_ON(!ctx_drvdata->pdev || !ctx_drvdata->pdev->dev.parent);
+
+ iommu_drvdata = dev_get_drvdata(ctx_drvdata->pdev->dev.parent);
+ BUG_ON(!iommu_drvdata);
+
+ asid = GET_CB_CONTEXTIDR_ASID(iommu_drvdata->base,
+ ctx_drvdata->num);
+
+ SET_TLBIVA(iommu_drvdata->base, ctx_drvdata->num,
+ asid | (va & CB_TLBIVA_VA));
+ mb();
+ }
+
+ return 0;
+}
+
+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 asid;
+
+ list_for_each_entry(ctx_drvdata, &priv->list_attached, attached_elm) {
+ BUG_ON(!ctx_drvdata->pdev || !ctx_drvdata->pdev->dev.parent);
+
+ iommu_drvdata = dev_get_drvdata(ctx_drvdata->pdev->dev.parent);
+ BUG_ON(!iommu_drvdata);
+
+ asid = GET_CB_CONTEXTIDR_ASID(iommu_drvdata->base,
+ ctx_drvdata->num);
+
+ SET_TLBIASID(iommu_drvdata->base, ctx_drvdata->num, asid);
+ mb();
+ }
+
+ return 0;
+}
+
+static void __reset_context(void __iomem *base, int ctx)
+{
+ SET_ACTLR(base, ctx, 0);
+ SET_FAR(base, ctx, 0);
+ SET_FSRRESTORE(base, ctx, 0);
+ SET_NMRR(base, ctx, 0);
+ SET_PAR(base, ctx, 0);
+ SET_PRRR(base, ctx, 0);
+ SET_SCTLR(base, ctx, 0);
+ SET_TLBIALL(base, ctx, 0);
+ SET_TTBCR(base, ctx, 0);
+ SET_TTBR0(base, ctx, 0);
+ SET_TTBR1(base, ctx, 0);
+ mb();
+}
+
+static void __program_context(void __iomem *base, int ctx, int ncb,
+ phys_addr_t pgtable, int redirect)
+{
+ unsigned int prrr, nmrr;
+ unsigned int pn;
+ int i, j, found;
+
+ __reset_context(base, ctx);
+
+ pn = pgtable >> CB_TTBR0_ADDR_SHIFT;
+ SET_TTBCR(base, ctx, 0);
+ SET_CB_TTBR0_ADDR(base, ctx, pn);
+
+ /* Enable context fault interrupt */
+ SET_CB_SCTLR_CFIE(base, ctx, 1);
+
+ /* Redirect all cacheable requests to L2 slave port. */
+ SET_CB_ACTLR_BPRCISH(base, ctx, 1);
+ SET_CB_ACTLR_BPRCOSH(base, ctx, 1);
+ SET_CB_ACTLR_BPRCNSH(base, ctx, 1);
+
+ /* Turn on TEX Remap */
+ SET_CB_SCTLR_TRE(base, ctx, 1);
+
+ /* Enable private ASID namespace */
+ SET_CB_SCTLR_ASIDPNE(base, ctx, 1);
+
+ /* Set TEX remap attributes */
+ RCP15_PRRR(prrr);
+ RCP15_NMRR(nmrr);
+ SET_PRRR(base, ctx, prrr);
+ SET_NMRR(base, ctx, nmrr);
+
+ /* Configure page tables as inner-cacheable and shareable to reduce
+ * the TLB miss penalty.
+ */
+ if (redirect) {
+ SET_CB_TTBR0_S(base, ctx, 1);
+ SET_CB_TTBR0_NOS(base, ctx, 1);
+ SET_CB_TTBR0_IRGN1(base, ctx, 0); /* WB, WA */
+ SET_CB_TTBR0_IRGN0(base, ctx, 1);
+ SET_CB_TTBR0_RGN(base, ctx, 1); /* WB, WA */
+ }
+
+ /* Find if this page table is used elsewhere, and re-use ASID */
+ found = 0;
+ for (i = 0; i < ncb; i++)
+ if ((GET_CB_TTBR0_ADDR(base, i) == pn) && (i != ctx)) {
+ SET_CB_CONTEXTIDR_ASID(base, ctx, \
+ GET_CB_CONTEXTIDR_ASID(base, i));
+ found = 1;
+ break;
+ }
+
+ /* If page table is new, find an unused ASID */
+ if (!found) {
+ for (i = 0; i < ncb; i++) {
+ found = 0;
+ for (j = 0; j < ncb; j++) {
+ if (GET_CB_CONTEXTIDR_ASID(base, j) == i &&
+ j != ctx)
+ found = 1;
+ }
+
+ if (!found) {
+ SET_CB_CONTEXTIDR_ASID(base, ctx, i);
+ break;
+ }
+ }
+ BUG_ON(found);
+ }
+
+ /* Enable the MMU */
+ SET_CB_SCTLR_M(base, ctx, 1);
+ mb();
+}
+
+static int msm_iommu_domain_init(struct iommu_domain *domain, int flags)
+{
+ struct msm_priv *priv;
+
+ priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ goto fail_nomem;
+
+#ifdef CONFIG_IOMMU_PGTABLES_L2
+ priv->pt.redirect = flags & MSM_IOMMU_DOMAIN_PT_CACHEABLE;
+#endif
+
+ INIT_LIST_HEAD(&priv->list_attached);
+ if (msm_iommu_pagetable_alloc(&priv->pt))
+ goto fail_nomem;
+
+ 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;
+
+ mutex_lock(&msm_iommu_lock);
+ priv = domain->priv;
+ domain->priv = NULL;
+
+ if (priv)
+ msm_iommu_pagetable_free(&priv->pt);
+
+ kfree(priv);
+ mutex_unlock(&msm_iommu_lock);
+}
+
+static int msm_iommu_attach_dev(struct iommu_domain *domain, struct device *dev)
+{
+ struct msm_priv *priv;
+ struct msm_iommu_drvdata *iommu_drvdata;
+ struct msm_iommu_ctx_drvdata *ctx_drvdata;
+ struct msm_iommu_ctx_drvdata *tmp_drvdata;
+ int ret = 0;
+
+ mutex_lock(&msm_iommu_lock);
+
+ priv = domain->priv;
+ if (!priv || !dev) {
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ iommu_drvdata = dev_get_drvdata(dev->parent);
+ ctx_drvdata = dev_get_drvdata(dev);
+ if (!iommu_drvdata || !ctx_drvdata) {
+ 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_drvdata->num,
+ iommu_drvdata->ncb, __pa(priv->pt.fl_table),
+ priv->pt.redirect);
+
+ __disable_clocks(iommu_drvdata);
+ list_add(&(ctx_drvdata->attached_elm), &priv->list_attached);
+ ctx_drvdata->attached_domain = domain;
+
+fail:
+ mutex_unlock(&msm_iommu_lock);
+ return ret;
+}
+
+static void msm_iommu_detach_dev(struct iommu_domain *domain,
+ struct device *dev)
+{
+ struct msm_priv *priv;
+ struct msm_iommu_drvdata *iommu_drvdata;
+ struct msm_iommu_ctx_drvdata *ctx_drvdata;
+ int ret;
+
+ mutex_lock(&msm_iommu_lock);
+ priv = domain->priv;
+ if (!priv || !dev)
+ goto fail;
+
+ iommu_drvdata = dev_get_drvdata(dev->parent);
+ ctx_drvdata = dev_get_drvdata(dev);
+ if (!iommu_drvdata || !ctx_drvdata || !ctx_drvdata->attached_domain)
+ goto fail;
+
+ ret = __enable_clocks(iommu_drvdata);
+ if (ret)
+ goto fail;
+
+ SET_TLBIASID(iommu_drvdata->base, ctx_drvdata->num,
+ GET_CB_CONTEXTIDR_ASID(iommu_drvdata->base, ctx_drvdata->num));
+
+ __reset_context(iommu_drvdata->base, ctx_drvdata->num);
+ __disable_clocks(iommu_drvdata);
+ list_del_init(&ctx_drvdata->attached_elm);
+ ctx_drvdata->attached_domain = NULL;
+
+fail:
+ mutex_unlock(&msm_iommu_lock);
+}
+
+static int msm_iommu_map(struct iommu_domain *domain, unsigned long va,
+ phys_addr_t pa, size_t len, int prot)
+{
+ struct msm_priv *priv;
+ int ret = 0;
+
+ mutex_lock(&msm_iommu_lock);
+
+ priv = domain->priv;
+ if (!priv) {
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ ret = msm_iommu_pagetable_map(&priv->pt, va, pa, len, prot);
+ if (ret)
+ goto fail;
+
+ ret = __flush_iotlb_va(domain, va);
+fail:
+ mutex_unlock(&msm_iommu_lock);
+ return ret;
+}
+
+static size_t msm_iommu_unmap(struct iommu_domain *domain, unsigned long va,
+ size_t len)
+{
+ struct msm_priv *priv;
+ int ret = -ENODEV;
+
+ mutex_lock(&msm_iommu_lock);
+
+ priv = domain->priv;
+ if (!priv)
+ goto fail;
+
+ ret = msm_iommu_pagetable_unmap(&priv->pt, va, len);
+ if (ret < 0)
+ goto fail;
+
+ ret = __flush_iotlb_va(domain, va);
+fail:
+ mutex_unlock(&msm_iommu_lock);
+
+ /* the IOMMU API requires us to return how many bytes were unmapped */
+ len = ret ? 0 : len;
+ return len;
+}
+
+static int msm_iommu_map_range(struct iommu_domain *domain, unsigned int va,
+ struct scatterlist *sg, unsigned int len,
+ int prot)
+{
+ int ret;
+ struct msm_priv *priv;
+
+ mutex_lock(&msm_iommu_lock);
+
+ priv = domain->priv;
+ if (!priv) {
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ ret = msm_iommu_pagetable_map_range(&priv->pt, va, sg, len, prot);
+ if (ret)
+ goto fail;
+
+ __flush_iotlb(domain);
+fail:
+ mutex_unlock(&msm_iommu_lock);
+ return ret;
+}
+
+
+static int msm_iommu_unmap_range(struct iommu_domain *domain, unsigned int va,
+ unsigned int len)
+{
+ struct msm_priv *priv;
+
+ mutex_lock(&msm_iommu_lock);
+
+ priv = domain->priv;
+ msm_iommu_pagetable_unmap_range(&priv->pt, va, len);
+
+ __flush_iotlb(domain);
+ mutex_unlock(&msm_iommu_lock);
+ return 0;
+}
+
+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;
+ void __iomem *base;
+ phys_addr_t pa = 0;
+ int ctx;
+
+ mutex_lock(&msm_iommu_lock);
+
+ 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;
+
+ SET_ATS1PR(base, ctx, va & CB_ATS1PR_ADDR);
+ mb();
+ while (GET_CB_ATSR_ACTIVE(base, ctx))
+ cpu_relax();
+
+ par = GET_PAR(base, ctx);
+ if (par & CB_PAR_F) {
+ pa = 0;
+ } else {
+ /* We are dealing with a supersection */
+ if (par & CB_PAR_SS)
+ pa = (par & 0xFF000000) | (va & 0x00FFFFFF);
+ else /* Upper 20 bits from PAR, lower 12 from VA */
+ pa = (par & 0xFFFFF000) | (va & 0x00000FFF);
+ }
+
+fail:
+ mutex_unlock(&msm_iommu_lock);
+ return pa;
+}
+
+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)
+{
+ 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]\n", fsr,
+ (fsr & 0x02) ? "TF " : "",
+ (fsr & 0x04) ? "AFF " : "",
+ (fsr & 0x08) ? "PF " : "",
+ (fsr & 0x10) ? "EF " : "",
+ (fsr & 0x20) ? "TLBMCF " : "",
+ (fsr & 0x40) ? "TLBLKF " : "",
+ (fsr & 0x80) ? "MHF " : "",
+ (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_v2(int irq, void *dev_id)
+{
+ struct platform_device *pdev = dev_id;
+ struct msm_iommu_drvdata *drvdata;
+ struct msm_iommu_ctx_drvdata *ctx_drvdata;
+ unsigned int fsr;
+ int ret = IRQ_NONE;
+
+ mutex_lock(&msm_iommu_lock);
+
+ BUG_ON(!pdev);
+
+ drvdata = dev_get_drvdata(pdev->dev.parent);
+ BUG_ON(!drvdata);
+
+ ctx_drvdata = dev_get_drvdata(&pdev->dev);
+ BUG_ON(!ctx_drvdata);
+
+ fsr = GET_FSR(drvdata->base, ctx_drvdata->num);
+ if (fsr) {
+ if (!ctx_drvdata->attached_domain) {
+ pr_err("Bad domain in interrupt handler\n");
+ ret = -ENOSYS;
+ } else
+ ret = report_iommu_fault(ctx_drvdata->attached_domain,
+ &ctx_drvdata->pdev->dev,
+ GET_FAR(drvdata->base, ctx_drvdata->num), 0);
+
+ if (ret == -ENOSYS) {
+ pr_err("Unexpected IOMMU page fault!\n");
+ pr_err("name = %s\n", drvdata->name);
+ pr_err("context = %s (%d)\n", ctx_drvdata->name,
+ ctx_drvdata->num);
+ pr_err("Interesting registers:\n");
+ print_ctx_regs(drvdata->base, ctx_drvdata->num, fsr);
+ }
+
+ SET_FSR(drvdata->base, ctx_drvdata->num, fsr);
+ ret = IRQ_HANDLED;
+ } else
+ ret = IRQ_NONE;
+
+ mutex_unlock(&msm_iommu_lock);
+ return ret;
+}
+
+static phys_addr_t msm_iommu_get_pt_base_addr(struct iommu_domain *domain)
+{
+ struct msm_priv *priv = domain->priv;
+ return __pa(priv->pt.fl_table);
+}
+
+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,
+ .map_range = msm_iommu_map_range,
+ .unmap_range = msm_iommu_unmap_range,
+ .iova_to_phys = msm_iommu_iova_to_phys,
+ .domain_has_cap = msm_iommu_domain_has_cap,
+ .get_pt_base_addr = msm_iommu_get_pt_base_addr,
+ .pgsize_bitmap = MSM_IOMMU_PGSIZES,
+};
+
+static int __init msm_iommu_init(void)
+{
+ msm_iommu_pagetable_init();
+ bus_set_iommu(&platform_bus_type, &msm_iommu_ops);
+ return 0;
+}
+
+subsys_initcall(msm_iommu_init);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("MSM SMMU v2 Driver");
diff --git a/drivers/iommu/msm_iommu.c b/drivers/iommu/msm_iommu.c
index cee307e..e17e1f8 100644
--- a/drivers/iommu/msm_iommu.c
+++ b/drivers/iommu/msm_iommu.c
@@ -1,4 +1,4 @@
-/* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved.
+/* Copyright (c) 2010-2012, 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
@@ -8,11 +8,6 @@
* 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
@@ -27,6 +22,7 @@
#include <linux/slab.h>
#include <linux/iommu.h>
#include <linux/clk.h>
+#include <linux/scatterlist.h>
#include <asm/cacheflush.h>
#include <asm/sizes.h>
@@ -42,15 +38,34 @@
#define RCP15_PRRR(reg) MRC(reg, p15, 0, c10, c2, 0)
#define RCP15_NMRR(reg) MRC(reg, p15, 0, c10, c2, 1)
+/* Sharability attributes of MSM IOMMU mappings */
+#define MSM_IOMMU_ATTR_NON_SH 0x0
+#define MSM_IOMMU_ATTR_SH 0x4
+
+/* Cacheability attributes of MSM IOMMU mappings */
+#define MSM_IOMMU_ATTR_NONCACHED 0x0
+#define MSM_IOMMU_ATTR_CACHED_WB_WA 0x1
+#define MSM_IOMMU_ATTR_CACHED_WB_NWA 0x2
+#define MSM_IOMMU_ATTR_CACHED_WT 0x3
+
+
+static inline void clean_pte(unsigned long *start, unsigned long *end,
+ int redirect)
+{
+ if (!redirect)
+ dmac_flush_range(start, end);
+}
+
/* bitmap of the page sizes currently supported */
#define MSM_IOMMU_PGSIZES (SZ_4K | SZ_64K | SZ_1M | SZ_16M)
static int msm_iommu_tex_class[4];
-DEFINE_SPINLOCK(msm_iommu_lock);
+DEFINE_MUTEX(msm_iommu_lock);
struct msm_priv {
unsigned long *pgtable;
+ int redirect;
struct list_head list_attached;
};
@@ -58,14 +73,14 @@
{
int ret;
- ret = clk_enable(drvdata->pclk);
+ ret = clk_prepare_enable(drvdata->pclk);
if (ret)
goto fail;
if (drvdata->clk) {
- ret = clk_enable(drvdata->clk);
+ ret = clk_prepare_enable(drvdata->clk);
if (ret)
- clk_disable(drvdata->pclk);
+ clk_disable_unprepare(drvdata->pclk);
}
fail:
return ret;
@@ -74,8 +89,40 @@
static void __disable_clocks(struct msm_iommu_drvdata *drvdata)
{
if (drvdata->clk)
- clk_disable(drvdata->clk);
- clk_disable(drvdata->pclk);
+ clk_disable_unprepare(drvdata->clk);
+ clk_disable_unprepare(drvdata->pclk);
+}
+
+static int __flush_iotlb_va(struct iommu_domain *domain, unsigned int va)
+{
+ struct msm_priv *priv = domain->priv;
+ struct msm_iommu_drvdata *iommu_drvdata;
+ struct msm_iommu_ctx_drvdata *ctx_drvdata;
+ int ret = 0;
+ int asid;
+
+ 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);
+ if (!iommu_drvdata)
+ BUG();
+
+ ret = __enable_clocks(iommu_drvdata);
+ if (ret)
+ goto fail;
+
+ asid = GET_CONTEXTIDR_ASID(iommu_drvdata->base,
+ ctx_drvdata->num);
+
+ SET_TLBIVA(iommu_drvdata->base, ctx_drvdata->num,
+ asid | (va & TLBIVA_VA));
+ mb();
+ __disable_clocks(iommu_drvdata);
+ }
+fail:
+ return ret;
}
static int __flush_iotlb(struct iommu_domain *domain)
@@ -84,34 +131,25 @@
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
+ int asid;
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);
+ if (!iommu_drvdata)
+ BUG();
ret = __enable_clocks(iommu_drvdata);
if (ret)
goto fail;
- SET_CTX_TLBIALL(iommu_drvdata->base, ctx_drvdata->num, 0);
+ asid = GET_CONTEXTIDR_ASID(iommu_drvdata->base,
+ ctx_drvdata->num);
+
+ SET_TLBIASID(iommu_drvdata->base, ctx_drvdata->num, asid);
+ mb();
__disable_clocks(iommu_drvdata);
}
fail:
@@ -134,17 +172,20 @@
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);
+ mb();
}
-static void __program_context(void __iomem *base, int ctx, phys_addr_t pgtable)
+static void __program_context(void __iomem *base, int ctx, int ncb,
+ phys_addr_t pgtable, int redirect,
+ int ttbr_split)
{
unsigned int prrr, nmrr;
+ int i, j, found;
__reset_context(base, ctx);
/* Set up HTW mode */
@@ -154,14 +195,10 @@
/* 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);
+ SET_TTBCR(base, ctx, ttbr_split);
+ SET_TTBR0_PA(base, ctx, (pgtable >> TTBR0_PA_SHIFT));
+ if (ttbr_split)
+ SET_TTBR1_PA(base, ctx, (pgtable >> TTBR1_PA_SHIFT));
/* Enable context fault interrupt */
SET_CFEIE(base, ctx, 1);
@@ -186,31 +223,61 @@
/* 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);
+ if (redirect) {
+ 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_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_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_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
+ SET_TTBR0_ORGN(base, ctx, 1); /* WB, WA */
+ SET_TTBR1_ORGN(base, ctx, 1); /* WB, WA */
+ }
+
+ /* Find if this page table is used elsewhere, and re-use ASID */
+ found = 0;
+ for (i = 0; i < ncb; i++)
+ if (GET_TTBR0_PA(base, i) == (pgtable >> TTBR0_PA_SHIFT) &&
+ i != ctx) {
+ SET_CONTEXTIDR_ASID(base, ctx, \
+ GET_CONTEXTIDR_ASID(base, i));
+ found = 1;
+ break;
+ }
+
+ /* If page table is new, find an unused ASID */
+ if (!found) {
+ for (i = 0; i < ncb; i++) {
+ found = 0;
+ for (j = 0; j < ncb; j++) {
+ if (GET_CONTEXTIDR_ASID(base, j) == i &&
+ j != ctx)
+ found = 1;
+ }
+
+ if (!found) {
+ SET_CONTEXTIDR_ASID(base, ctx, i);
+ break;
+ }
+ }
+ BUG_ON(found);
+ }
/* Enable the MMU */
SET_M(base, ctx, 1);
+ mb();
}
-static int msm_iommu_domain_init(struct iommu_domain *domain)
+static int msm_iommu_domain_init(struct iommu_domain *domain, int flags)
{
struct msm_priv *priv = kzalloc(sizeof(*priv), GFP_KERNEL);
@@ -224,8 +291,15 @@
if (!priv->pgtable)
goto fail_nomem;
+#ifdef CONFIG_IOMMU_PGTABLES_L2
+ priv->redirect = flags & MSM_IOMMU_DOMAIN_PT_CACHEABLE;
+#endif
+
memset(priv->pgtable, 0, SZ_16K);
domain->priv = priv;
+
+ clean_pte(priv->pgtable, priv->pgtable + NUM_FL_PTE, priv->redirect);
+
return 0;
fail_nomem:
@@ -236,11 +310,10 @@
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);
+ mutex_lock(&msm_iommu_lock);
priv = domain->priv;
domain->priv = NULL;
@@ -257,7 +330,7 @@
}
kfree(priv);
- spin_unlock_irqrestore(&msm_iommu_lock, flags);
+ mutex_unlock(&msm_iommu_lock);
}
static int msm_iommu_attach_dev(struct iommu_domain *domain, struct device *dev)
@@ -268,9 +341,8 @@
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);
+ mutex_lock(&msm_iommu_lock);
priv = domain->priv;
@@ -303,15 +375,16 @@
if (ret)
goto fail;
- __program_context(iommu_drvdata->base, ctx_dev->num,
- __pa(priv->pgtable));
+ __program_context(iommu_drvdata->base, ctx_dev->num, iommu_drvdata->ncb,
+ __pa(priv->pgtable), priv->redirect,
+ iommu_drvdata->ttbr_split);
__disable_clocks(iommu_drvdata);
list_add(&(ctx_drvdata->attached_elm), &priv->list_attached);
- ret = __flush_iotlb(domain);
+ ctx_drvdata->attached_domain = domain;
fail:
- spin_unlock_irqrestore(&msm_iommu_lock, flags);
+ mutex_unlock(&msm_iommu_lock);
return ret;
}
@@ -322,10 +395,9 @@
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);
+ mutex_lock(&msm_iommu_lock);
priv = domain->priv;
if (!priv || !dev)
@@ -338,27 +410,67 @@
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;
+ SET_TLBIASID(iommu_drvdata->base, ctx_dev->num,
+ GET_CONTEXTIDR_ASID(iommu_drvdata->base, ctx_dev->num));
+
__reset_context(iommu_drvdata->base, ctx_dev->num);
__disable_clocks(iommu_drvdata);
list_del_init(&ctx_drvdata->attached_elm);
-
+ ctx_drvdata->attached_domain = NULL;
fail:
- spin_unlock_irqrestore(&msm_iommu_lock, flags);
+ mutex_unlock(&msm_iommu_lock);
+}
+
+static int __get_pgprot(int prot, int len)
+{
+ unsigned int pgprot;
+ int tex;
+
+ if (!(prot & (IOMMU_READ | IOMMU_WRITE))) {
+ prot |= IOMMU_READ | IOMMU_WRITE;
+ WARN_ONCE(1, "No attributes in iommu mapping; assuming RW\n");
+ }
+
+ if ((prot & IOMMU_WRITE) && !(prot & IOMMU_READ)) {
+ prot |= IOMMU_READ;
+ WARN_ONCE(1, "Write-only iommu mappings unsupported; falling back to RW\n");
+ }
+
+ if (prot & IOMMU_CACHE)
+ tex = (pgprot_kernel >> 2) & 0x07;
+ else
+ tex = msm_iommu_tex_class[MSM_IOMMU_ATTR_NONCACHED];
+
+ if (tex < 0 || tex > NUM_TEX_CLASS - 1)
+ return 0;
+
+ if (len == SZ_16M || len == SZ_1M) {
+ pgprot = FL_SHARED;
+ pgprot |= tex & 0x01 ? FL_BUFFERABLE : 0;
+ pgprot |= tex & 0x02 ? FL_CACHEABLE : 0;
+ pgprot |= tex & 0x04 ? FL_TEX0 : 0;
+ pgprot |= FL_AP0 | FL_AP1;
+ pgprot |= prot & IOMMU_WRITE ? 0 : FL_AP2;
+ } else {
+ pgprot = SL_SHARED;
+ pgprot |= tex & 0x01 ? SL_BUFFERABLE : 0;
+ pgprot |= tex & 0x02 ? SL_CACHEABLE : 0;
+ pgprot |= tex & 0x04 ? SL_TEX0 : 0;
+ pgprot |= SL_AP0 | SL_AP1;
+ pgprot |= prot & IOMMU_WRITE ? 0 : SL_AP2;
+ }
+
+ return pgprot;
}
static int msm_iommu_map(struct iommu_domain *domain, unsigned long va,
phys_addr_t pa, size_t len, int prot)
{
struct msm_priv *priv;
- unsigned long flags;
unsigned long *fl_table;
unsigned long *fl_pte;
unsigned long fl_offset;
@@ -366,17 +478,9 @@
unsigned long *sl_pte;
unsigned long sl_offset;
unsigned int pgprot;
- int ret = 0, tex, sh;
+ int ret = 0;
- 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;
- }
+ mutex_lock(&msm_iommu_lock);
priv = domain->priv;
if (!priv) {
@@ -399,16 +503,11 @@
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;
+ pgprot = __get_pgprot(prot, len);
+
+ if (!pgprot) {
+ ret = -EINVAL;
+ goto fail;
}
fl_offset = FL_OFFSET(va); /* Upper 12 bits */
@@ -416,52 +515,92 @@
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 (*(fl_pte+i)) {
+ ret = -EBUSY;
+ goto fail;
+ }
+
+ for (i = 0; i < 16; i++)
+ *(fl_pte+i) = (pa & 0xFF000000) | FL_SUPERSECTION
+ | FL_TYPE_SECT | FL_SHARED | FL_NG | pgprot;
+ clean_pte(fl_pte, fl_pte + 16, priv->redirect);
}
- 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;
+ if (len == SZ_1M) {
+ if (*fl_pte) {
+ ret = -EBUSY;
goto fail;
}
- memset(sl, 0, SZ_4K);
- *fl_pte = ((((int)__pa(sl)) & FL_BASE_MASK) | FL_TYPE_TABLE);
+ *fl_pte = (pa & 0xFFF00000) | FL_NG | FL_TYPE_SECT | FL_SHARED
+ | pgprot;
+ clean_pte(fl_pte, fl_pte + 1, priv->redirect);
+ }
+
+ /* Need a 2nd level table */
+ if (len == SZ_4K || len == SZ_64K) {
+
+ if (*fl_pte == 0) {
+ unsigned long *sl;
+ sl = (unsigned long *) __get_free_pages(GFP_KERNEL,
+ get_order(SZ_4K));
+
+ if (!sl) {
+ pr_debug("Could not allocate second level table\n");
+ ret = -ENOMEM;
+ goto fail;
+ }
+ memset(sl, 0, SZ_4K);
+ clean_pte(sl, sl + NUM_SL_PTE, priv->redirect);
+
+ *fl_pte = ((((int)__pa(sl)) & FL_BASE_MASK) | \
+ FL_TYPE_TABLE);
+
+ clean_pte(fl_pte, fl_pte + 1, priv->redirect);
+ }
+
+ if (!(*fl_pte & FL_TYPE_TABLE)) {
+ ret = -EBUSY;
+ goto fail;
+ }
}
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) {
+ if (*sl_pte) {
+ ret = -EBUSY;
+ goto fail;
+ }
- if (len == SZ_4K)
- *sl_pte = (pa & SL_BASE_MASK_SMALL) | SL_AP0 | SL_AP1 | SL_NG |
- SL_SHARED | SL_TYPE_SMALL | pgprot;
+ *sl_pte = (pa & SL_BASE_MASK_SMALL) | SL_NG | SL_SHARED
+ | SL_TYPE_SMALL | pgprot;
+ clean_pte(sl_pte, sl_pte + 1, priv->redirect);
+ }
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;
+ if (*(sl_pte+i)) {
+ ret = -EBUSY;
+ goto fail;
+ }
+
+ for (i = 0; i < 16; i++)
+ *(sl_pte+i) = (pa & SL_BASE_MASK_LARGE) | SL_NG
+ | SL_SHARED | SL_TYPE_LARGE | pgprot;
+
+ clean_pte(sl_pte, sl_pte + 16, priv->redirect);
}
- ret = __flush_iotlb(domain);
+ ret = __flush_iotlb_va(domain, va);
fail:
- spin_unlock_irqrestore(&msm_iommu_lock, flags);
+ mutex_unlock(&msm_iommu_lock);
return ret;
}
@@ -469,7 +608,6 @@
size_t len)
{
struct msm_priv *priv;
- unsigned long flags;
unsigned long *fl_table;
unsigned long *fl_pte;
unsigned long fl_offset;
@@ -478,7 +616,7 @@
unsigned long sl_offset;
int i, ret = 0;
- spin_lock_irqsave(&msm_iommu_lock, flags);
+ mutex_lock(&msm_iommu_lock);
priv = domain->priv;
@@ -507,13 +645,19 @@
}
/* Unmap supersection */
- if (len == SZ_16M)
+ if (len == SZ_16M) {
for (i = 0; i < 16; i++)
*(fl_pte+i) = 0;
- if (len == SZ_1M)
+ clean_pte(fl_pte, fl_pte + 16, priv->redirect);
+ }
+
+ if (len == SZ_1M) {
*fl_pte = 0;
+ clean_pte(fl_pte, fl_pte + 1, priv->redirect);
+ }
+
sl_table = (unsigned long *) __va(((*fl_pte) & FL_BASE_MASK));
sl_offset = SL_OFFSET(va);
sl_pte = sl_table + sl_offset;
@@ -521,11 +665,16 @@
if (len == SZ_64K) {
for (i = 0; i < 16; i++)
*(sl_pte+i) = 0;
+
+ clean_pte(sl_pte, sl_pte + 16, priv->redirect);
}
- if (len == SZ_4K)
+ if (len == SZ_4K) {
*sl_pte = 0;
+ clean_pte(sl_pte, sl_pte + 1, priv->redirect);
+ }
+
if (len == SZ_4K || len == SZ_64K) {
int used = 0;
@@ -535,19 +684,211 @@
if (!used) {
free_page((unsigned long)sl_table);
*fl_pte = 0;
+
+ clean_pte(fl_pte, fl_pte + 1, priv->redirect);
}
}
- ret = __flush_iotlb(domain);
+ ret = __flush_iotlb_va(domain, va);
fail:
- spin_unlock_irqrestore(&msm_iommu_lock, flags);
+ mutex_unlock(&msm_iommu_lock);
/* the IOMMU API requires us to return how many bytes were unmapped */
len = ret ? 0 : len;
return len;
}
+static unsigned int get_phys_addr(struct scatterlist *sg)
+{
+ /*
+ * Try sg_dma_address first so that we can
+ * map carveout regions that do not have a
+ * struct page associated with them.
+ */
+ unsigned int pa = sg_dma_address(sg);
+ if (pa == 0)
+ pa = sg_phys(sg);
+ return pa;
+}
+
+static int msm_iommu_map_range(struct iommu_domain *domain, unsigned int va,
+ struct scatterlist *sg, unsigned int len,
+ int prot)
+{
+ unsigned int pa;
+ unsigned int offset = 0;
+ unsigned int pgprot;
+ unsigned long *fl_table;
+ unsigned long *fl_pte;
+ unsigned long fl_offset;
+ unsigned long *sl_table;
+ unsigned long sl_offset, sl_start;
+ unsigned int chunk_offset = 0;
+ unsigned int chunk_pa;
+ int ret = 0;
+ struct msm_priv *priv;
+
+ mutex_lock(&msm_iommu_lock);
+
+ BUG_ON(len & (SZ_4K - 1));
+
+ priv = domain->priv;
+ fl_table = priv->pgtable;
+
+ pgprot = __get_pgprot(prot, SZ_4K);
+
+ if (!pgprot) {
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ fl_offset = FL_OFFSET(va); /* Upper 12 bits */
+ fl_pte = fl_table + fl_offset; /* int pointers, 4 bytes */
+
+ sl_table = (unsigned long *) __va(((*fl_pte) & FL_BASE_MASK));
+ sl_offset = SL_OFFSET(va);
+
+ chunk_pa = get_phys_addr(sg);
+ if (chunk_pa == 0) {
+ pr_debug("No dma address for sg %p\n", sg);
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ while (offset < len) {
+ /* Set up a 2nd level page table if one doesn't exist */
+ if (*fl_pte == 0) {
+ sl_table = (unsigned long *)
+ __get_free_pages(GFP_KERNEL, get_order(SZ_4K));
+
+ if (!sl_table) {
+ pr_debug("Could not allocate second level table\n");
+ ret = -ENOMEM;
+ goto fail;
+ }
+
+ memset(sl_table, 0, SZ_4K);
+ clean_pte(sl_table, sl_table + NUM_SL_PTE,
+ priv->redirect);
+
+ *fl_pte = ((((int)__pa(sl_table)) & FL_BASE_MASK) |
+ FL_TYPE_TABLE);
+ clean_pte(fl_pte, fl_pte + 1, priv->redirect);
+ } else
+ sl_table = (unsigned long *)
+ __va(((*fl_pte) & FL_BASE_MASK));
+
+ /* Keep track of initial position so we
+ * don't clean more than we have to
+ */
+ sl_start = sl_offset;
+
+ /* Build the 2nd level page table */
+ while (offset < len && sl_offset < NUM_SL_PTE) {
+ pa = chunk_pa + chunk_offset;
+ sl_table[sl_offset] = (pa & SL_BASE_MASK_SMALL) |
+ pgprot | SL_NG | SL_SHARED | SL_TYPE_SMALL;
+ sl_offset++;
+ offset += SZ_4K;
+
+ chunk_offset += SZ_4K;
+
+ if (chunk_offset >= sg->length && offset < len) {
+ chunk_offset = 0;
+ sg = sg_next(sg);
+ chunk_pa = get_phys_addr(sg);
+ if (chunk_pa == 0) {
+ pr_debug("No dma address for sg %p\n",
+ sg);
+ ret = -EINVAL;
+ goto fail;
+ }
+ }
+ }
+
+ clean_pte(sl_table + sl_start, sl_table + sl_offset,
+ priv->redirect);
+
+ fl_pte++;
+ sl_offset = 0;
+ }
+ __flush_iotlb(domain);
+fail:
+ mutex_unlock(&msm_iommu_lock);
+ return ret;
+}
+
+
+static int msm_iommu_unmap_range(struct iommu_domain *domain, unsigned int va,
+ unsigned int len)
+{
+ unsigned int offset = 0;
+ unsigned long *fl_table;
+ unsigned long *fl_pte;
+ unsigned long fl_offset;
+ unsigned long *sl_table;
+ unsigned long sl_start, sl_end;
+ int used, i;
+ struct msm_priv *priv;
+
+ mutex_lock(&msm_iommu_lock);
+
+ BUG_ON(len & (SZ_4K - 1));
+
+ priv = domain->priv;
+ fl_table = priv->pgtable;
+
+ fl_offset = FL_OFFSET(va); /* Upper 12 bits */
+ fl_pte = fl_table + fl_offset; /* int pointers, 4 bytes */
+
+ sl_start = SL_OFFSET(va);
+
+ while (offset < len) {
+ sl_table = (unsigned long *) __va(((*fl_pte) & FL_BASE_MASK));
+ sl_end = ((len - offset) / SZ_4K) + sl_start;
+
+ if (sl_end > NUM_SL_PTE)
+ sl_end = NUM_SL_PTE;
+
+ memset(sl_table + sl_start, 0, (sl_end - sl_start) * 4);
+ clean_pte(sl_table + sl_start, sl_table + sl_end,
+ priv->redirect);
+
+ offset += (sl_end - sl_start) * SZ_4K;
+
+ /* Unmap and free the 2nd level table if all mappings in it
+ * were removed. This saves memory, but the table will need
+ * to be re-allocated the next time someone tries to map these
+ * VAs.
+ */
+ used = 0;
+
+ /* If we just unmapped the whole table, don't bother
+ * seeing if there are still used entries left.
+ */
+ if (sl_end - sl_start != NUM_SL_PTE)
+ for (i = 0; i < NUM_SL_PTE; i++)
+ if (sl_table[i]) {
+ used = 1;
+ break;
+ }
+ if (!used) {
+ free_page((unsigned long)sl_table);
+ *fl_pte = 0;
+
+ clean_pte(fl_pte, fl_pte + 1, priv->redirect);
+ }
+
+ sl_start = 0;
+ fl_pte++;
+ }
+
+ __flush_iotlb(domain);
+ mutex_unlock(&msm_iommu_lock);
+ return 0;
+}
+
static phys_addr_t msm_iommu_iova_to_phys(struct iommu_domain *domain,
unsigned long va)
{
@@ -555,12 +896,11 @@
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);
+ mutex_lock(&msm_iommu_lock);
priv = domain->priv;
if (list_empty(&priv->list_attached))
@@ -577,10 +917,9 @@
if (ret)
goto fail;
- /* Invalidate context TLB */
- SET_CTX_TLBIALL(base, ctx, 0);
SET_V2PPR(base, ctx, va & V2Pxx_VA);
+ mb();
par = GET_PAR(base, ctx);
/* We are dealing with a supersection */
@@ -594,7 +933,7 @@
__disable_clocks(iommu_drvdata);
fail:
- spin_unlock_irqrestore(&msm_iommu_lock, flags);
+ mutex_unlock(&msm_iommu_lock);
return ret;
}
@@ -633,40 +972,61 @@
irqreturn_t msm_iommu_fault_handler(int irq, void *dev_id)
{
- struct msm_iommu_drvdata *drvdata = dev_id;
+ struct msm_iommu_ctx_drvdata *ctx_drvdata = dev_id;
+ struct msm_iommu_drvdata *drvdata;
void __iomem *base;
- unsigned int fsr;
- int i, ret;
+ unsigned int fsr, num;
+ int ret;
- spin_lock(&msm_iommu_lock);
+ mutex_lock(&msm_iommu_lock);
+ BUG_ON(!ctx_drvdata);
- if (!drvdata) {
- pr_err("Invalid device ID in context interrupt handler\n");
- goto fail;
- }
+ drvdata = dev_get_drvdata(ctx_drvdata->pdev->dev.parent);
+ BUG_ON(!drvdata);
base = drvdata->base;
-
- pr_err("Unexpected IOMMU page fault!\n");
- pr_err("base = %08x\n", (unsigned int) base);
+ num = ctx_drvdata->num;
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);
+ fsr = GET_FSR(base, num);
+
+ if (fsr) {
+ if (!ctx_drvdata->attached_domain) {
+ pr_err("Bad domain in interrupt handler\n");
+ ret = -ENOSYS;
+ } else
+ ret = report_iommu_fault(ctx_drvdata->attached_domain,
+ &ctx_drvdata->pdev->dev,
+ GET_FAR(base, num), 0);
+
+ if (ret == -ENOSYS) {
+ pr_err("Unexpected IOMMU page fault!\n");
+ pr_err("name = %s\n", drvdata->name);
+ pr_err("context = %s (%d)\n", ctx_drvdata->name, num);
pr_err("Interesting registers:\n");
- print_ctx_regs(base, i);
- SET_FSR(base, i, 0x4000000F);
+ print_ctx_regs(base, num);
}
- }
+
+ SET_FSR(base, num, fsr);
+ SET_RESUME(base, num, 1);
+
+ ret = IRQ_HANDLED;
+ } else
+ ret = IRQ_NONE;
+
__disable_clocks(drvdata);
fail:
- spin_unlock(&msm_iommu_lock);
- return 0;
+ mutex_unlock(&msm_iommu_lock);
+ return ret;
+}
+
+static phys_addr_t msm_iommu_get_pt_base_addr(struct iommu_domain *domain)
+{
+ struct msm_priv *priv = domain->priv;
+ return __pa(priv->pgtable);
}
static struct iommu_ops msm_iommu_ops = {
@@ -676,8 +1036,11 @@
.detach_dev = msm_iommu_detach_dev,
.map = msm_iommu_map,
.unmap = msm_iommu_unmap,
+ .map_range = msm_iommu_map_range,
+ .unmap_range = msm_iommu_unmap_range,
.iova_to_phys = msm_iommu_iova_to_phys,
.domain_has_cap = msm_iommu_domain_has_cap,
+ .get_pt_base_addr = msm_iommu_get_pt_base_addr,
.pgsize_bitmap = MSM_IOMMU_PGSIZES,
};
@@ -721,6 +1084,9 @@
static int __init msm_iommu_init(void)
{
+ if (!msm_soc_version_supports_iommu_v1())
+ return -ENODEV;
+
setup_iommu_tex_classes();
bus_set_iommu(&platform_bus_type, &msm_iommu_ops);
return 0;
diff --git a/drivers/iommu/msm_iommu_dev-v2.c b/drivers/iommu/msm_iommu_dev-v2.c
new file mode 100644
index 0000000..e690ada
--- /dev/null
+++ b/drivers/iommu/msm_iommu_dev-v2.c
@@ -0,0 +1,376 @@
+/* Copyright (c) 2012 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.
+ */
+
+#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 <linux/atomic.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+
+#include <mach/iommu_hw-v2.h>
+#include <mach/iommu.h>
+
+static void msm_iommu_reset(void __iomem *base)
+{
+ int i;
+
+ SET_ACR(base, 0);
+ SET_NSACR(base, 0);
+ SET_CR2(base, 0);
+ SET_NSCR2(base, 0);
+ SET_GFAR(base, 0);
+ SET_GFSRRESTORE(base, 0);
+ SET_TLBIALLNSNH(base, 0);
+ SET_PMCR(base, 0);
+ SET_SCR1(base, 0);
+ SET_SSDR_N(base, 0, 0);
+
+ for (i = 0; i < MAX_NUM_SMR; i++)
+ SET_SMR_VALID(base, i, 0);
+
+ mb();
+}
+
+static int msm_iommu_parse_dt(struct platform_device *pdev,
+ struct msm_iommu_drvdata *drvdata)
+{
+ struct device_node *child;
+ int ret;
+
+ ret = device_move(&pdev->dev, &msm_iommu_root_dev->dev, DPM_ORDER_NONE);
+ if (ret)
+ return ret;
+
+ for_each_child_of_node(pdev->dev.of_node, child) {
+ drvdata->ncb++;
+ if (!of_platform_device_create(child, NULL, &pdev->dev))
+ pr_err("Failed to create %s device\n", child->name);
+ }
+
+ drvdata->name = dev_name(&pdev->dev);
+ return 0;
+}
+
+static atomic_t msm_iommu_next_id = ATOMIC_INIT(-1);
+
+static int __devinit msm_iommu_probe(struct platform_device *pdev)
+{
+ struct msm_iommu_drvdata *drvdata;
+ struct resource *r;
+ int ret;
+
+ if (msm_iommu_root_dev == pdev)
+ return 0;
+
+ if (pdev->id == -1)
+ pdev->id = atomic_inc_return(&msm_iommu_next_id) - 1;
+
+ drvdata = devm_kzalloc(&pdev->dev, sizeof(*drvdata), GFP_KERNEL);
+ if (!drvdata)
+ return -ENOMEM;
+
+ r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!r)
+ return -EINVAL;
+
+ drvdata->base = devm_ioremap(&pdev->dev, r->start, resource_size(r));
+ if (!drvdata->base)
+ return -ENOMEM;
+
+ drvdata->pclk = clk_get(&pdev->dev, "iface_clk");
+ if (IS_ERR(drvdata->pclk))
+ return PTR_ERR(drvdata->pclk);
+
+ ret = clk_prepare_enable(drvdata->pclk);
+ if (ret)
+ goto fail_enable;
+
+ drvdata->clk = clk_get(&pdev->dev, "core_clk");
+ if (!IS_ERR(drvdata->clk)) {
+ if (clk_get_rate(drvdata->clk) == 0) {
+ ret = clk_round_rate(drvdata->clk, 1);
+ clk_set_rate(drvdata->clk, ret);
+ }
+
+ ret = clk_prepare_enable(drvdata->clk);
+ if (ret) {
+ clk_put(drvdata->clk);
+ goto fail_pclk;
+ }
+ } else
+ drvdata->clk = NULL;
+
+ msm_iommu_reset(drvdata->base);
+
+ SET_CR0_SMCFCFG(drvdata->base, 1);
+ SET_CR0_USFCFG(drvdata->base, 1);
+ SET_CR0_STALLD(drvdata->base, 1);
+ SET_CR0_GCFGFIE(drvdata->base, 1);
+ SET_CR0_GCFGFRE(drvdata->base, 1);
+ SET_CR0_GFIE(drvdata->base, 1);
+ SET_CR0_GFRE(drvdata->base, 1);
+ SET_CR0_CLIENTPD(drvdata->base, 0);
+
+ ret = msm_iommu_parse_dt(pdev, drvdata);
+ if (ret)
+ goto fail_clk;
+
+ pr_info("device %s mapped at %p, with %d ctx banks\n",
+ drvdata->name, drvdata->base, drvdata->ncb);
+
+ platform_set_drvdata(pdev, drvdata);
+
+ if (drvdata->clk)
+ clk_disable_unprepare(drvdata->clk);
+
+ clk_disable_unprepare(drvdata->pclk);
+
+ return 0;
+
+fail_clk:
+ if (drvdata->clk) {
+ clk_disable_unprepare(drvdata->clk);
+ clk_put(drvdata->clk);
+ }
+fail_pclk:
+ clk_disable_unprepare(drvdata->pclk);
+fail_enable:
+ clk_put(drvdata->pclk);
+ return ret;
+}
+
+static int __devexit 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);
+ platform_set_drvdata(pdev, NULL);
+ }
+ return 0;
+}
+
+static int msm_iommu_ctx_parse_dt(struct platform_device *pdev,
+ struct msm_iommu_drvdata *drvdata,
+ struct msm_iommu_ctx_drvdata *ctx_drvdata)
+{
+ struct resource *r, rp;
+ u32 sids[MAX_NUM_SMR];
+ int num = 0;
+ int irq, i, ret, len = 0;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq > 0) {
+ ret = request_threaded_irq(irq, NULL,
+ msm_iommu_fault_handler_v2,
+ IRQF_ONESHOT | IRQF_SHARED,
+ "msm_iommu_nonsecure_irq", pdev);
+ if (ret) {
+ pr_err("Request IRQ %d failed with ret=%d\n", irq, ret);
+ return ret;
+ }
+ }
+
+ r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!r)
+ return -EINVAL;
+
+ ret = of_address_to_resource(pdev->dev.parent->of_node, 0, &rp);
+ if (ret)
+ return -EINVAL;
+
+ /* Calculate the context bank number using the base addresses. The
+ * first 8 pages belong to the global address space which is followed
+ * by the context banks, hence subtract by 8 to get the context bank
+ * number.
+ */
+ ctx_drvdata->num = ((r->start - rp.start) >> CTX_SHIFT) - 8;
+
+ if (of_property_read_string(pdev->dev.of_node, "qcom,iommu-ctx-name",
+ &ctx_drvdata->name))
+ ctx_drvdata->name = dev_name(&pdev->dev);
+
+ of_get_property(pdev->dev.of_node, "qcom,iommu-ctx-sids", &len);
+ BUG_ON(len >= sizeof(sids));
+ if (of_property_read_u32_array(pdev->dev.of_node, "qcom,iommu-ctx-sids",
+ sids, len / sizeof(*sids)))
+ return -EINVAL;
+
+ /* Program the M2V tables for this context */
+ for (i = 0; i < len / sizeof(*sids); i++) {
+ for (; num < MAX_NUM_SMR; num++)
+ if (GET_SMR_VALID(drvdata->base, num) == 0)
+ break;
+ BUG_ON(num >= MAX_NUM_SMR);
+
+ SET_SMR_VALID(drvdata->base, num, 1);
+ SET_SMR_MASK(drvdata->base, num, 0);
+ SET_SMR_ID(drvdata->base, num, sids[i]);
+
+ /* Set VMID = 0 */
+ SET_S2CR_N(drvdata->base, num, 0);
+ SET_S2CR_CBNDX(drvdata->base, num, ctx_drvdata->num);
+ /* Set security bit override to be Non-secure */
+ SET_S2CR_NSCFG(drvdata->base, sids[i], 3);
+
+ SET_CBAR_N(drvdata->base, ctx_drvdata->num, 0);
+ /* Stage 1 Context with Stage 2 bypass */
+ SET_CBAR_TYPE(drvdata->base, ctx_drvdata->num, 1);
+ /* Route page faults to the non-secure interrupt */
+ SET_CBAR_IRPTNDX(drvdata->base, ctx_drvdata->num, 1);
+ }
+ mb();
+
+ return 0;
+}
+
+static int __devinit msm_iommu_ctx_probe(struct platform_device *pdev)
+{
+ struct msm_iommu_drvdata *drvdata;
+ struct msm_iommu_ctx_drvdata *ctx_drvdata = NULL;
+ int ret;
+
+ if (!pdev->dev.parent)
+ return -EINVAL;
+
+ drvdata = dev_get_drvdata(pdev->dev.parent);
+ if (!drvdata)
+ return -ENODEV;
+
+ ctx_drvdata = devm_kzalloc(&pdev->dev, sizeof(*ctx_drvdata),
+ GFP_KERNEL);
+ if (!ctx_drvdata)
+ return -ENOMEM;
+
+ ctx_drvdata->pdev = pdev;
+ INIT_LIST_HEAD(&ctx_drvdata->attached_elm);
+ platform_set_drvdata(pdev, ctx_drvdata);
+
+ ret = clk_prepare_enable(drvdata->pclk);
+ if (ret)
+ return ret;
+
+ if (drvdata->clk) {
+ ret = clk_prepare_enable(drvdata->clk);
+ if (ret) {
+ clk_disable_unprepare(drvdata->pclk);
+ return ret;
+ }
+ }
+
+ ret = msm_iommu_ctx_parse_dt(pdev, drvdata, ctx_drvdata);
+ if (!ret)
+ dev_info(&pdev->dev, "context %s using bank %d\n",
+ dev_name(&pdev->dev), ctx_drvdata->num);
+
+ if (drvdata->clk)
+ clk_disable_unprepare(drvdata->clk);
+ clk_disable_unprepare(drvdata->pclk);
+
+ return ret;
+}
+
+static int __devexit msm_iommu_ctx_remove(struct platform_device *pdev)
+{
+ platform_set_drvdata(pdev, NULL);
+ return 0;
+}
+
+static struct of_device_id msm_iommu_match_table[] = {
+ { .compatible = "qcom,msm-smmu-v2", },
+ {}
+};
+
+static struct platform_driver msm_iommu_driver = {
+ .driver = {
+ .name = "msm_iommu_v2",
+ .of_match_table = msm_iommu_match_table,
+ },
+ .probe = msm_iommu_probe,
+ .remove = __devexit_p(msm_iommu_remove),
+};
+
+static struct of_device_id msm_iommu_ctx_match_table[] = {
+ { .name = "qcom,iommu-ctx", },
+ {}
+};
+
+static struct platform_driver msm_iommu_ctx_driver = {
+ .driver = {
+ .name = "msm_iommu_ctx_v2",
+ .of_match_table = msm_iommu_ctx_match_table,
+ },
+ .probe = msm_iommu_ctx_probe,
+ .remove = __devexit_p(msm_iommu_ctx_remove),
+};
+
+static int __init msm_iommu_driver_init(void)
+{
+ struct device_node *node;
+ int ret;
+
+ node = of_find_compatible_node(NULL, NULL, "qcom,msm-smmu-v2");
+ if (!node)
+ return -ENODEV;
+
+ of_node_put(node);
+
+ msm_iommu_root_dev = platform_device_register_simple(
+ "msm_iommu", -1, 0, 0);
+ if (!msm_iommu_root_dev) {
+ pr_err("Failed to create root IOMMU device\n");
+ ret = -ENODEV;
+ goto error;
+ }
+
+ atomic_inc(&msm_iommu_next_id);
+
+ 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);
+ platform_device_unregister(msm_iommu_root_dev);
+}
+
+subsys_initcall(msm_iommu_driver_init);
+module_exit(msm_iommu_driver_exit);
+
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iommu/msm_iommu_dev.c b/drivers/iommu/msm_iommu_dev.c
index 8e8fb07..c164825 100644
--- a/drivers/iommu/msm_iommu_dev.c
+++ b/drivers/iommu/msm_iommu_dev.c
@@ -1,4 +1,4 @@
-/* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved.
+/* Copyright (c) 2010-2012, 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
@@ -8,11 +8,6 @@
* 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
@@ -29,7 +24,6 @@
#include <mach/iommu_hw-8xxx.h>
#include <mach/iommu.h>
-#include <mach/clk.h>
struct iommu_ctx_iter_data {
/* input */
@@ -39,13 +33,14 @@
struct device *dev;
};
-static struct platform_device *msm_iommu_root_dev;
+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;
+ struct msm_iommu_ctx_drvdata *c;
+ c = dev_get_drvdata(dev);
if (!res || !c || !c->name || !res->name)
return -EINVAL;
@@ -74,7 +69,7 @@
r.name = ctx_name;
found = device_for_each_child(&msm_iommu_root_dev->dev, &r, each_iommu);
- if (!found) {
+ if (!found || !dev_get_drvdata(r.dev)) {
pr_err("Could not find context <%s>\n", ctx_name);
goto fail;
}
@@ -116,26 +111,28 @@
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_CTX_TLBIALL(base, ctx, 0);
+ SET_TLBIVA(base, ctx, 0);
SET_PRRR(base, ctx, 0);
SET_NMRR(base, ctx, 0);
SET_CONTEXTIDR(base, ctx, 0);
}
+ mb();
}
static int msm_iommu_probe(struct platform_device *pdev)
{
struct resource *r, *r2;
- struct clk *iommu_clk;
- struct clk *iommu_pclk;
+ struct clk *iommu_clk = NULL;
+ struct clk *iommu_pclk = NULL;
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;
+ int ret, par;
if (pdev->id == -1) {
msm_iommu_root_dev = pdev;
@@ -154,23 +151,25 @@
goto fail;
}
- iommu_pclk = clk_get(NULL, "smmu_pclk");
+ iommu_pclk = clk_get_sys("msm_iommu", "iface_clk");
if (IS_ERR(iommu_pclk)) {
ret = -ENODEV;
goto fail;
}
- ret = clk_enable(iommu_pclk);
+ ret = clk_prepare_enable(iommu_pclk);
if (ret)
goto fail_enable;
- iommu_clk = clk_get(&pdev->dev, "iommu_clk");
+ iommu_clk = clk_get(&pdev->dev, "core_clk");
if (!IS_ERR(iommu_clk)) {
- if (clk_get_rate(iommu_clk) == 0)
- clk_set_min_rate(iommu_clk, 1);
+ if (clk_get_rate(iommu_clk) == 0) {
+ ret = clk_round_rate(iommu_clk, 1);
+ clk_set_rate(iommu_clk, ret);
+ }
- ret = clk_enable(iommu_clk);
+ ret = clk_prepare_enable(iommu_clk);
if (ret) {
clk_put(iommu_clk);
goto fail_pclk;
@@ -204,21 +203,17 @@
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);
+ mb();
par = GET_PAR(regs_base, 0);
SET_V2PCFG(regs_base, 0, 0);
SET_M(regs_base, 0, 0);
+ mb();
if (!par) {
pr_err("%s: Invalid PAR value detected\n", iommu_dev->name);
@@ -226,29 +221,22 @@
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;
+ drvdata->ttbr_split = iommu_dev->ttbr_split;
+ drvdata->name = iommu_dev->name;
- pr_info("device %s mapped at %p, irq %d with %d ctx banks\n",
- iommu_dev->name, regs_base, irq, iommu_dev->ncb);
+ pr_info("device %s mapped at %p, with %d ctx banks\n",
+ iommu_dev->name, regs_base, iommu_dev->ncb);
platform_set_drvdata(pdev, drvdata);
if (iommu_clk)
- clk_disable(iommu_clk);
+ clk_disable_unprepare(iommu_clk);
- clk_disable(iommu_pclk);
+ clk_disable_unprepare(iommu_pclk);
return 0;
fail_io:
@@ -257,11 +245,11 @@
release_mem_region(r->start, len);
fail_clk:
if (iommu_clk) {
- clk_disable(iommu_clk);
+ clk_disable_unprepare(iommu_clk);
clk_put(iommu_clk);
}
fail_pclk:
- clk_disable(iommu_pclk);
+ clk_disable_unprepare(iommu_pclk);
fail_enable:
clk_put(iommu_pclk);
fail:
@@ -290,7 +278,7 @@
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;
+ int i, ret, irq;
if (!c || !pdev->dev.parent) {
ret = -EINVAL;
goto fail;
@@ -310,18 +298,35 @@
}
ctx_drvdata->num = c->num;
ctx_drvdata->pdev = pdev;
+ ctx_drvdata->name = c->name;
+
+ irq = platform_get_irq_byname(to_platform_device(pdev->dev.parent),
+ "nonsecure_irq");
+ if (irq < 0) {
+ ret = -ENODEV;
+ goto fail;
+ }
+
+ ret = request_threaded_irq(irq, NULL, msm_iommu_fault_handler,
+ IRQF_ONESHOT | IRQF_SHARED,
+ "msm_iommu_nonsecure_irq", ctx_drvdata);
+
+ if (ret) {
+ pr_err("request_threaded_irq %d failed: %d\n", irq, ret);
+ goto fail;
+ }
INIT_LIST_HEAD(&ctx_drvdata->attached_elm);
platform_set_drvdata(pdev, ctx_drvdata);
- ret = clk_enable(drvdata->pclk);
+ ret = clk_prepare_enable(drvdata->pclk);
if (ret)
goto fail;
if (drvdata->clk) {
- ret = clk_enable(drvdata->clk);
+ ret = clk_prepare_enable(drvdata->clk);
if (ret) {
- clk_disable(drvdata->pclk);
+ clk_disable_unprepare(drvdata->pclk);
goto fail;
}
}
@@ -335,25 +340,29 @@
SET_M2VCBR_N(drvdata->base, mid, 0);
SET_CBACR_N(drvdata->base, c->num, 0);
+ /* Route page faults to the non-secure interrupt */
+ SET_IRPTNDX(drvdata->base, c->num, 1);
+
/* 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 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 the ASID for TLB tagging for this context to 0 */
+ SET_CONTEXTIDR_ASID(drvdata->base, c->num, 0);
/* Set security bit override to be Non-secure */
SET_NSCFG(drvdata->base, mid, 3);
}
+ mb();
if (drvdata->clk)
- clk_disable(drvdata->clk);
- clk_disable(drvdata->pclk);
+ clk_disable_unprepare(drvdata->clk);
+ clk_disable_unprepare(drvdata->pclk);
dev_info(&pdev->dev, "context %s using bank %d\n", c->name, c->num);
return 0;
diff --git a/drivers/iommu/msm_iommu_pagetable.c b/drivers/iommu/msm_iommu_pagetable.c
new file mode 100644
index 0000000..b93860e
--- /dev/null
+++ b/drivers/iommu/msm_iommu_pagetable.c
@@ -0,0 +1,519 @@
+/* Copyright (c) 2012 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.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/io.h>
+#include <linux/iommu.h>
+#include <linux/scatterlist.h>
+
+#include <asm/cacheflush.h>
+
+#include <mach/iommu.h>
+#include "msm_iommu_pagetable.h"
+
+/* Sharability attributes of MSM IOMMU mappings */
+#define MSM_IOMMU_ATTR_NON_SH 0x0
+#define MSM_IOMMU_ATTR_SH 0x4
+
+/* Cacheability attributes of MSM IOMMU mappings */
+#define MSM_IOMMU_ATTR_NONCACHED 0x0
+#define MSM_IOMMU_ATTR_CACHED_WB_WA 0x1
+#define MSM_IOMMU_ATTR_CACHED_WB_NWA 0x2
+#define MSM_IOMMU_ATTR_CACHED_WT 0x3
+
+static int msm_iommu_tex_class[4];
+
+static inline void clean_pte(unsigned long *start, unsigned long *end,
+ int redirect)
+{
+ if (!redirect)
+ dmac_flush_range(start, end);
+}
+
+int msm_iommu_pagetable_alloc(struct iommu_pt *pt)
+{
+ pt->fl_table = (unsigned long *)__get_free_pages(GFP_KERNEL,
+ get_order(SZ_16K));
+ if (!pt->fl_table)
+ return -ENOMEM;
+
+ memset(pt->fl_table, 0, SZ_16K);
+ clean_pte(pt->fl_table, pt->fl_table + NUM_FL_PTE, pt->redirect);
+
+ return 0;
+}
+
+void msm_iommu_pagetable_free(struct iommu_pt *pt)
+{
+ unsigned long *fl_table;
+ int i;
+
+ fl_table = pt->fl_table;
+ 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)fl_table, get_order(SZ_16K));
+ pt->fl_table = 0;
+}
+
+static int __get_pgprot(int prot, int len)
+{
+ unsigned int pgprot;
+ int tex;
+
+ if (!(prot & (IOMMU_READ | IOMMU_WRITE))) {
+ prot |= IOMMU_READ | IOMMU_WRITE;
+ WARN_ONCE(1, "No attributes in iommu mapping; assuming RW\n");
+ }
+
+ if ((prot & IOMMU_WRITE) && !(prot & IOMMU_READ)) {
+ prot |= IOMMU_READ;
+ WARN_ONCE(1, "Write-only unsupported; falling back to RW\n");
+ }
+
+ if (prot & IOMMU_CACHE)
+ tex = (pgprot_kernel >> 2) & 0x07;
+ else
+ tex = msm_iommu_tex_class[MSM_IOMMU_ATTR_NONCACHED];
+
+ if (tex < 0 || tex > NUM_TEX_CLASS - 1)
+ return 0;
+
+ if (len == SZ_16M || len == SZ_1M) {
+ pgprot = FL_SHARED;
+ pgprot |= tex & 0x01 ? FL_BUFFERABLE : 0;
+ pgprot |= tex & 0x02 ? FL_CACHEABLE : 0;
+ pgprot |= tex & 0x04 ? FL_TEX0 : 0;
+ pgprot |= FL_AP0 | FL_AP1;
+ pgprot |= prot & IOMMU_WRITE ? 0 : FL_AP2;
+ } else {
+ pgprot = SL_SHARED;
+ pgprot |= tex & 0x01 ? SL_BUFFERABLE : 0;
+ pgprot |= tex & 0x02 ? SL_CACHEABLE : 0;
+ pgprot |= tex & 0x04 ? SL_TEX0 : 0;
+ pgprot |= SL_AP0 | SL_AP1;
+ pgprot |= prot & IOMMU_WRITE ? 0 : SL_AP2;
+ }
+
+ return pgprot;
+}
+
+int msm_iommu_pagetable_map(struct iommu_pt *pt, unsigned long va,
+ phys_addr_t pa, size_t len, int prot)
+{
+ unsigned long *fl_pte;
+ unsigned long fl_offset;
+ unsigned long *sl_table;
+ unsigned long *sl_pte;
+ unsigned long sl_offset;
+ unsigned int pgprot;
+ int ret = 0;
+
+ 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 (!pt->fl_table) {
+ pr_debug("Null page table\n");
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ pgprot = __get_pgprot(prot, len);
+ if (!pgprot) {
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ fl_offset = FL_OFFSET(va); /* Upper 12 bits */
+ fl_pte = pt->fl_table + fl_offset; /* int pointers, 4 bytes */
+
+ if (len == SZ_16M) {
+ int i = 0;
+
+ for (i = 0; i < 16; i++)
+ if (*(fl_pte+i)) {
+ ret = -EBUSY;
+ goto fail;
+ }
+
+ for (i = 0; i < 16; i++)
+ *(fl_pte+i) = (pa & 0xFF000000) | FL_SUPERSECTION |
+ FL_TYPE_SECT | FL_SHARED | FL_NG | pgprot;
+ clean_pte(fl_pte, fl_pte + 16, pt->redirect);
+ }
+
+ if (len == SZ_1M) {
+ if (*fl_pte) {
+ ret = -EBUSY;
+ goto fail;
+ }
+
+ *fl_pte = (pa & 0xFFF00000) | FL_NG | FL_TYPE_SECT
+ | FL_SHARED | pgprot;
+ clean_pte(fl_pte, fl_pte + 1, pt->redirect);
+ }
+
+ /* Need a 2nd level table */
+ if (len == SZ_4K || len == SZ_64K) {
+
+ if (*fl_pte == 0) {
+ unsigned long *sl;
+ sl = (unsigned long *) __get_free_pages(GFP_KERNEL,
+ get_order(SZ_4K));
+
+ if (!sl) {
+ pr_debug("Could not allocate second level table\n");
+ ret = -ENOMEM;
+ goto fail;
+ }
+ memset(sl, 0, SZ_4K);
+ clean_pte(sl, sl + NUM_SL_PTE, pt->redirect);
+
+ *fl_pte = ((((int)__pa(sl)) & FL_BASE_MASK) | \
+ FL_TYPE_TABLE);
+ clean_pte(fl_pte, fl_pte + 1, pt->redirect);
+ }
+
+ if (!(*fl_pte & FL_TYPE_TABLE)) {
+ ret = -EBUSY;
+ goto fail;
+ }
+ }
+
+ 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) {
+ if (*sl_pte) {
+ ret = -EBUSY;
+ goto fail;
+ }
+
+ *sl_pte = (pa & SL_BASE_MASK_SMALL) | SL_NG | SL_SHARED
+ | SL_TYPE_SMALL | pgprot;
+ clean_pte(sl_pte, sl_pte + 1, pt->redirect);
+ }
+
+ if (len == SZ_64K) {
+ int i;
+
+ for (i = 0; i < 16; i++)
+ if (*(sl_pte+i)) {
+ ret = -EBUSY;
+ goto fail;
+ }
+
+ for (i = 0; i < 16; i++)
+ *(sl_pte+i) = (pa & SL_BASE_MASK_LARGE) | SL_NG
+ | SL_SHARED | SL_TYPE_LARGE | pgprot;
+
+ clean_pte(sl_pte, sl_pte + 16, pt->redirect);
+ }
+
+fail:
+ return ret;
+}
+
+size_t msm_iommu_pagetable_unmap(struct iommu_pt *pt, unsigned long va,
+ size_t len)
+{
+ unsigned long *fl_pte;
+ unsigned long fl_offset;
+ unsigned long *sl_table;
+ unsigned long *sl_pte;
+ unsigned long sl_offset;
+ int i, ret = 0;
+
+ 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 (!pt->fl_table) {
+ pr_debug("Null page table\n");
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ fl_offset = FL_OFFSET(va); /* Upper 12 bits */
+ fl_pte = pt->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;
+
+ clean_pte(fl_pte, fl_pte + 16, pt->redirect);
+ }
+
+ if (len == SZ_1M) {
+ *fl_pte = 0;
+ clean_pte(fl_pte, fl_pte + 1, pt->redirect);
+ }
+
+ 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;
+
+ clean_pte(sl_pte, sl_pte + 16, pt->redirect);
+ }
+
+ if (len == SZ_4K) {
+ *sl_pte = 0;
+ clean_pte(sl_pte, sl_pte + 1, pt->redirect);
+ }
+
+ 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;
+ clean_pte(fl_pte, fl_pte + 1, pt->redirect);
+ }
+ }
+
+fail:
+ return ret;
+}
+
+static unsigned int get_phys_addr(struct scatterlist *sg)
+{
+ /*
+ * Try sg_dma_address first so that we can
+ * map carveout regions that do not have a
+ * struct page associated with them.
+ */
+ unsigned int pa = sg_dma_address(sg);
+ if (pa == 0)
+ pa = sg_phys(sg);
+ return pa;
+}
+
+int msm_iommu_pagetable_map_range(struct iommu_pt *pt, unsigned int va,
+ struct scatterlist *sg, unsigned int len, int prot)
+{
+ unsigned int pa;
+ unsigned int offset = 0;
+ unsigned int pgprot;
+ unsigned long *fl_pte;
+ unsigned long fl_offset;
+ unsigned long *sl_table;
+ unsigned long sl_offset, sl_start;
+ unsigned int chunk_offset = 0;
+ unsigned int chunk_pa;
+ int ret = 0;
+
+ BUG_ON(len & (SZ_4K - 1));
+
+ pgprot = __get_pgprot(prot, SZ_4K);
+ if (!pgprot) {
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ fl_offset = FL_OFFSET(va); /* Upper 12 bits */
+ fl_pte = pt->fl_table + fl_offset; /* int pointers, 4 bytes */
+
+ sl_table = (unsigned long *) __va(((*fl_pte) & FL_BASE_MASK));
+ sl_offset = SL_OFFSET(va);
+
+ chunk_pa = get_phys_addr(sg);
+ if (chunk_pa == 0) {
+ pr_debug("No dma address for sg %p\n", sg);
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ while (offset < len) {
+ /* Set up a 2nd level page table if one doesn't exist */
+ if (*fl_pte == 0) {
+ sl_table = (unsigned long *)
+ __get_free_pages(GFP_KERNEL, get_order(SZ_4K));
+
+ if (!sl_table) {
+ pr_debug("Could not allocate second level table\n");
+ ret = -ENOMEM;
+ goto fail;
+ }
+
+ memset(sl_table, 0, SZ_4K);
+ clean_pte(sl_table, sl_table + NUM_SL_PTE,
+ pt->redirect);
+
+ *fl_pte = ((((int)__pa(sl_table)) & FL_BASE_MASK) |
+ FL_TYPE_TABLE);
+ clean_pte(fl_pte, fl_pte + 1, pt->redirect);
+ } else
+ sl_table = (unsigned long *)
+ __va(((*fl_pte) & FL_BASE_MASK));
+
+ /* Keep track of initial position so we
+ * don't clean more than we have to
+ */
+ sl_start = sl_offset;
+
+ /* Build the 2nd level page table */
+ while (offset < len && sl_offset < NUM_SL_PTE) {
+ pa = chunk_pa + chunk_offset;
+ sl_table[sl_offset] = (pa & SL_BASE_MASK_SMALL) |
+ pgprot | SL_NG | SL_SHARED | SL_TYPE_SMALL;
+ sl_offset++;
+ offset += SZ_4K;
+
+ chunk_offset += SZ_4K;
+
+ if (chunk_offset >= sg->length && offset < len) {
+ chunk_offset = 0;
+ sg = sg_next(sg);
+ chunk_pa = get_phys_addr(sg);
+ if (chunk_pa == 0) {
+ pr_debug("No dma address for sg %p\n",
+ sg);
+ ret = -EINVAL;
+ goto fail;
+ }
+ }
+ }
+
+ clean_pte(sl_table + sl_start, sl_table + sl_offset,
+ pt->redirect);
+ fl_pte++;
+ sl_offset = 0;
+ }
+
+fail:
+ return ret;
+}
+
+void msm_iommu_pagetable_unmap_range(struct iommu_pt *pt, unsigned int va,
+ unsigned int len)
+{
+ unsigned int offset = 0;
+ unsigned long *fl_pte;
+ unsigned long fl_offset;
+ unsigned long *sl_table;
+ unsigned long sl_start, sl_end;
+ int used, i;
+
+ BUG_ON(len & (SZ_4K - 1));
+
+ fl_offset = FL_OFFSET(va); /* Upper 12 bits */
+ fl_pte = pt->fl_table + fl_offset; /* int pointers, 4 bytes */
+
+ sl_start = SL_OFFSET(va);
+
+ while (offset < len) {
+ sl_table = (unsigned long *) __va(((*fl_pte) & FL_BASE_MASK));
+ sl_end = ((len - offset) / SZ_4K) + sl_start;
+
+ if (sl_end > NUM_SL_PTE)
+ sl_end = NUM_SL_PTE;
+
+ memset(sl_table + sl_start, 0, (sl_end - sl_start) * 4);
+ clean_pte(sl_table + sl_start, sl_table + sl_end,
+ pt->redirect);
+
+ offset += (sl_end - sl_start) * SZ_4K;
+
+ /* Unmap and free the 2nd level table if all mappings in it
+ * were removed. This saves memory, but the table will need
+ * to be re-allocated the next time someone tries to map these
+ * VAs.
+ */
+ used = 0;
+
+ /* If we just unmapped the whole table, don't bother
+ * seeing if there are still used entries left.
+ */
+ if (sl_end - sl_start != NUM_SL_PTE)
+ for (i = 0; i < NUM_SL_PTE; i++)
+ if (sl_table[i]) {
+ used = 1;
+ break;
+ }
+ if (!used) {
+ free_page((unsigned long)sl_table);
+ *fl_pte = 0;
+ clean_pte(fl_pte, fl_pte + 1, pt->redirect);
+ }
+
+ sl_start = 0;
+ fl_pte++;
+ }
+}
+
+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);
+}
+
+void __init msm_iommu_pagetable_init(void)
+{
+ setup_iommu_tex_classes();
+}
diff --git a/drivers/iommu/msm_iommu_pagetable.h b/drivers/iommu/msm_iommu_pagetable.h
new file mode 100644
index 0000000..b943084
--- /dev/null
+++ b/drivers/iommu/msm_iommu_pagetable.h
@@ -0,0 +1,90 @@
+/* Copyright (c) 2012 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.
+ */
+
+#ifndef __ARCH_ARM_MACH_MSM_IOMMU_PAGETABLE_H
+#define __ARCH_ARM_MACH_MSM_IOMMU_PAGETABLE_H
+
+#define NUM_FL_PTE 4096
+#define NUM_SL_PTE 256
+#define NUM_TEX_CLASS 8
+
+/* First-level page table bits */
+#define FL_BASE_MASK 0xFFFFFC00
+#define FL_TYPE_TABLE (1 << 0)
+#define FL_TYPE_SECT (2 << 0)
+#define FL_SUPERSECTION (1 << 18)
+#define FL_AP0 (1 << 10)
+#define FL_AP1 (1 << 11)
+#define FL_AP2 (1 << 15)
+#define FL_SHARED (1 << 16)
+#define FL_BUFFERABLE (1 << 2)
+#define FL_CACHEABLE (1 << 3)
+#define FL_TEX0 (1 << 12)
+#define FL_OFFSET(va) (((va) & 0xFFF00000) >> 20)
+#define FL_NG (1 << 17)
+
+/* Second-level page table bits */
+#define SL_BASE_MASK_LARGE 0xFFFF0000
+#define SL_BASE_MASK_SMALL 0xFFFFF000
+#define SL_TYPE_LARGE (1 << 0)
+#define SL_TYPE_SMALL (2 << 0)
+#define SL_AP0 (1 << 4)
+#define SL_AP1 (2 << 4)
+#define SL_AP2 (1 << 9)
+#define SL_SHARED (1 << 10)
+#define SL_BUFFERABLE (1 << 2)
+#define SL_CACHEABLE (1 << 3)
+#define SL_TEX0 (1 << 6)
+#define SL_OFFSET(va) (((va) & 0xFF000) >> 12)
+#define SL_NG (1 << 11)
+
+/* Memory type and cache policy attributes */
+#define MT_SO 0
+#define MT_DEV 1
+#define MT_NORMAL 2
+#define CP_NONCACHED 0
+#define CP_WB_WA 1
+#define CP_WT 2
+#define CP_WB_NWA 3
+
+/* TEX Remap Registers */
+#define NMRR_ICP(nmrr, n) (((nmrr) & (3 << ((n) * 2))) >> ((n) * 2))
+#define NMRR_OCP(nmrr, n) (((nmrr) & (3 << ((n) * 2 + 16))) >> ((n) * 2 + 16))
+
+#define PRRR_NOS(prrr, n) ((prrr) & (1 << ((n) + 24)) ? 1 : 0)
+#define PRRR_MT(prrr, n) ((((prrr) & (3 << ((n) * 2))) >> ((n) * 2)))
+
+#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)
+
+struct iommu_pt {
+ unsigned long *fl_table;
+ int redirect;
+};
+
+void msm_iommu_pagetable_init(void);
+int msm_iommu_pagetable_alloc(struct iommu_pt *pt);
+void msm_iommu_pagetable_free(struct iommu_pt *pt);
+int msm_iommu_pagetable_map(struct iommu_pt *pt, unsigned long va,
+ phys_addr_t pa, size_t len, int prot);
+size_t msm_iommu_pagetable_unmap(struct iommu_pt *pt, unsigned long va,
+ size_t len);
+int msm_iommu_pagetable_map_range(struct iommu_pt *pt, unsigned int va,
+ struct scatterlist *sg, unsigned int len, int prot);
+void msm_iommu_pagetable_unmap_range(struct iommu_pt *pt, unsigned int va,
+ unsigned int len);
+#endif