Updated iommu/msm_bus
diff --git a/drivers/iommu/msm_iommu_dev-v2.c b/drivers/iommu/msm_iommu_dev-v2.c
new file mode 100644
index 0000000..4c69c8c
--- /dev/null
+++ b/drivers/iommu/msm_iommu_dev-v2.c
@@ -0,0 +1,308 @@
+/* Copyright (c) 2012 The Linux Foundation. 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 int msm_iommu_parse_dt(struct platform_device *pdev,
+ struct msm_iommu_drvdata *drvdata)
+{
+ struct device_node *child;
+ int ret = 0;
+ u32 nsmr;
+
+ ret = device_move(&pdev->dev, &msm_iommu_root_dev->dev, DPM_ORDER_NONE);
+ if (ret)
+ goto fail;
+
+ ret = of_property_read_u32(pdev->dev.of_node, "qcom,iommu-smt-size",
+ &nsmr);
+ if (ret)
+ goto fail;
+
+ if (nsmr > MAX_NUM_SMR) {
+ pr_err("Invalid SMT size: %d\n", nsmr);
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ drvdata->nsmr = nsmr;
+ 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);
+fail:
+ return ret;
+}
+
+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, needs_alt_core_clk;
+
+ 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->gdsc = devm_regulator_get(&pdev->dev, "vdd");
+ if (IS_ERR(drvdata->gdsc))
+ return -EINVAL;
+
+ drvdata->pclk = devm_clk_get(&pdev->dev, "iface_clk");
+ if (IS_ERR(drvdata->pclk))
+ return PTR_ERR(drvdata->pclk);
+
+ drvdata->clk = devm_clk_get(&pdev->dev, "core_clk");
+ if (IS_ERR(drvdata->clk))
+ return PTR_ERR(drvdata->clk);
+
+ needs_alt_core_clk = of_property_read_bool(pdev->dev.of_node,
+ "qcom,needs-alt-core-clk");
+ if (needs_alt_core_clk) {
+ drvdata->aclk = devm_clk_get(&pdev->dev, "alt_core_clk");
+ if (IS_ERR(drvdata->aclk))
+ return PTR_ERR(drvdata->aclk);
+ }
+
+ if (clk_get_rate(drvdata->clk) == 0) {
+ ret = clk_round_rate(drvdata->clk, 1);
+ clk_set_rate(drvdata->clk, ret);
+ }
+
+ if (drvdata->aclk && clk_get_rate(drvdata->aclk) == 0) {
+ ret = clk_round_rate(drvdata->aclk, 1);
+ clk_set_rate(drvdata->aclk, ret);
+ }
+
+ ret = msm_iommu_parse_dt(pdev, drvdata);
+ if (ret)
+ return ret;
+
+ pr_info("device %s mapped at %p, with %d ctx banks\n",
+ drvdata->name, drvdata->base, drvdata->ncb);
+
+ platform_set_drvdata(pdev, drvdata);
+
+ return 0;
+}
+
+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_ctx_drvdata *ctx_drvdata)
+{
+ struct resource *r, rp;
+ int irq, ret;
+ u32 nsid;
+
+ 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, "label",
+ &ctx_drvdata->name))
+ ctx_drvdata->name = dev_name(&pdev->dev);
+
+ if (!of_get_property(pdev->dev.of_node, "qcom,iommu-ctx-sids", &nsid))
+ return -EINVAL;
+
+ if (nsid >= sizeof(ctx_drvdata->sids))
+ return -EINVAL;
+
+ if (of_property_read_u32_array(pdev->dev.of_node, "qcom,iommu-ctx-sids",
+ ctx_drvdata->sids,
+ nsid / sizeof(*ctx_drvdata->sids))) {
+ return -EINVAL;
+ }
+ ctx_drvdata->nsid = nsid;
+
+ return 0;
+}
+
+static int __devinit msm_iommu_ctx_probe(struct platform_device *pdev)
+{
+ struct msm_iommu_ctx_drvdata *ctx_drvdata = NULL;
+ int ret;
+
+ if (!pdev->dev.parent)
+ return -EINVAL;
+
+ 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 = msm_iommu_ctx_parse_dt(pdev, ctx_drvdata);
+ if (!ret)
+ dev_info(&pdev->dev, "context %s using bank %d\n",
+ ctx_drvdata->name, ctx_drvdata->num);
+
+ 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");