Merge branch 'v2.6.34-rc7.iommu' of git://gitorious.org/~doyu/lk/mainline into omap-for-linus

8 files changed, 244 insertions, 151 deletions

diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile
index 4b9fc57770d..7d2cf0f714c 100644
--- a/arch/arm/mach-omap2/Makefile
+++ b/arch/arm/mach-omap2/Makefile
@@ -89,10 +89,7 @@ obj-$(CONFIG_OMAP3_EMU)			+= emu.o
 obj-$(CONFIG_OMAP_MBOX_FWK)		+= mailbox_mach.o
 mailbox_mach-objs			:= mailbox.o
 
-iommu-y					+= iommu2.o
-iommu-$(CONFIG_ARCH_OMAP3)		+= omap3-iommu.o
-
-obj-$(CONFIG_OMAP_IOMMU)		+= $(iommu-y)
+obj-$(CONFIG_OMAP_IOMMU)		:= iommu2.o omap-iommu.o
 
 i2c-omap-$(CONFIG_I2C_OMAP)		:= i2c.o
 obj-y					+= $(i2c-omap-m) $(i2c-omap-y)
diff --git a/arch/arm/mach-omap2/iommu2.c b/arch/arm/mach-omap2/iommu2.c
index 4f63dc6859a..e82da680d90 100644
--- a/arch/arm/mach-omap2/iommu2.c
+++ b/arch/arm/mach-omap2/iommu2.c
@@ -147,6 +147,7 @@ static u32 omap2_iommu_fault_isr(struct iommu *obj, u32 *ra)
 	printk("\n");
 
 	iommu_write_reg(obj, stat, MMU_IRQSTATUS);
+	omap2_iommu_disable(obj);
 	return stat;
 }
 
@@ -184,7 +185,7 @@ static struct cr_regs *omap2_alloc_cr(struct iommu *obj, struct iotlb_entry *e)
 	if (!cr)
 		return ERR_PTR(-ENOMEM);
 
-	cr->cam = (e->da & MMU_CAM_VATAG_MASK) | e->prsvd | e->pgsz;
+	cr->cam = (e->da & MMU_CAM_VATAG_MASK) | e->prsvd | e->pgsz | e->valid;
 	cr->ram = e->pa | e->endian | e->elsz | e->mixed;
 
 	return cr;
@@ -212,7 +213,8 @@ static ssize_t omap2_dump_cr(struct iommu *obj, struct cr_regs *cr, char *buf)
 	char *p = buf;
 
 	/* FIXME: Need more detail analysis of cam/ram */
-	p += sprintf(p, "%08x %08x\n", cr->cam, cr->ram);
+	p += sprintf(p, "%08x %08x %01x\n", cr->cam, cr->ram,
+					(cr->cam & MMU_CAM_P) ? 1 : 0);
 
 	return p - buf;
 }
diff --git a/arch/arm/mach-omap2/omap-iommu.c b/arch/arm/mach-omap2/omap-iommu.c
new file mode 100644
index 00000000000..eb9bee73e0c
--- /dev/null
+++ b/arch/arm/mach-omap2/omap-iommu.c
@@ -0,0 +1,157 @@
+/*
+ * omap iommu: omap device registration
+ *
+ * Copyright (C) 2008-2009 Nokia Corporation
+ *
+ * Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/platform_device.h>
+
+#include <plat/iommu.h>
+#include <plat/irqs.h>
+
+struct iommu_device {
+	resource_size_t base;
+	int irq;
+	struct iommu_platform_data pdata;
+	struct resource res[2];
+};
+static struct iommu_device *devices;
+static int num_iommu_devices;
+
+#ifdef CONFIG_ARCH_OMAP3
+static struct iommu_device omap3_devices[] = {
+	{
+		.base = 0x480bd400,
+		.irq = 24,
+		.pdata = {
+			.name = "isp",
+			.nr_tlb_entries = 8,
+			.clk_name = "cam_ick",
+		},
+	},
+#if defined(CONFIG_MPU_BRIDGE_IOMMU)
+	{
+		.base = 0x5d000000,
+		.irq = 28,
+		.pdata = {
+			.name = "iva2",
+			.nr_tlb_entries = 32,
+			.clk_name = "iva2_ck",
+		},
+	},
+#endif
+};
+#define NR_OMAP3_IOMMU_DEVICES ARRAY_SIZE(omap3_devices)
+static struct platform_device *omap3_iommu_pdev[NR_OMAP3_IOMMU_DEVICES];
+#else
+#define omap3_devices		NULL
+#define NR_OMAP3_IOMMU_DEVICES	0
+#define omap3_iommu_pdev	NULL
+#endif
+
+#ifdef CONFIG_ARCH_OMAP4
+static struct iommu_device omap4_devices[] = {
+	{
+		.base = OMAP4_MMU1_BASE,
+		.irq = INT_44XX_DUCATI_MMU_IRQ,
+		.pdata = {
+			.name = "ducati",
+			.nr_tlb_entries = 32,
+			.clk_name = "ducati_ick",
+		},
+	},
+#if defined(CONFIG_MPU_TESLA_IOMMU)
+	{
+		.base = OMAP4_MMU2_BASE,
+		.irq = INT_44XX_DSP_MMU,
+		.pdata = {
+			.name = "tesla",
+			.nr_tlb_entries = 32,
+			.clk_name = "tesla_ick",
+		},
+	},
+#endif
+};
+#define NR_OMAP4_IOMMU_DEVICES ARRAY_SIZE(omap4_devices)
+static struct platform_device *omap4_iommu_pdev[NR_OMAP4_IOMMU_DEVICES];
+#else
+#define omap4_devices		NULL
+#define NR_OMAP4_IOMMU_DEVICES	0
+#define omap4_iommu_pdev	NULL
+#endif
+
+static struct platform_device **omap_iommu_pdev;
+
+static int __init omap_iommu_init(void)
+{
+	int i, err;
+	struct resource res[] = {
+		{ .flags = IORESOURCE_MEM },
+		{ .flags = IORESOURCE_IRQ },
+	};
+
+	if (cpu_is_omap34xx()) {
+		devices = omap3_devices;
+		omap_iommu_pdev = omap3_iommu_pdev;
+		num_iommu_devices = NR_OMAP3_IOMMU_DEVICES;
+	} else if (cpu_is_omap44xx()) {
+		devices = omap4_devices;
+		omap_iommu_pdev = omap4_iommu_pdev;
+		num_iommu_devices = NR_OMAP4_IOMMU_DEVICES;
+	} else
+		return -ENODEV;
+
+	for (i = 0; i < num_iommu_devices; i++) {
+		struct platform_device *pdev;
+		const struct iommu_device *d = &devices[i];
+
+		pdev = platform_device_alloc("omap-iommu", i);
+		if (!pdev) {
+			err = -ENOMEM;
+			goto err_out;
+		}
+
+		res[0].start = d->base;
+		res[0].end = d->base + MMU_REG_SIZE - 1;
+		res[1].start = res[1].end = d->irq;
+
+		err = platform_device_add_resources(pdev, res,
+						    ARRAY_SIZE(res));
+		if (err)
+			goto err_out;
+		err = platform_device_add_data(pdev, &d->pdata,
+					       sizeof(d->pdata));
+		if (err)
+			goto err_out;
+		err = platform_device_add(pdev);
+		if (err)
+			goto err_out;
+		omap_iommu_pdev[i] = pdev;
+	}
+	return 0;
+
+err_out:
+	while (i--)
+		platform_device_put(omap_iommu_pdev[i]);
+	return err;
+}
+module_init(omap_iommu_init);
+
+static void __exit omap_iommu_exit(void)
+{
+	int i;
+
+	for (i = 0; i < num_iommu_devices; i++)
+		platform_device_unregister(omap_iommu_pdev[i]);
+}
+module_exit(omap_iommu_exit);
+
+MODULE_AUTHOR("Hiroshi DOYU");
+MODULE_DESCRIPTION("omap iommu: omap device registration");
+MODULE_LICENSE("GPL v2");
diff --git a/arch/arm/mach-omap2/omap3-iommu.c b/arch/arm/mach-omap2/omap3-iommu.c
deleted file mode 100644
index fbbcb5c8336..00000000000
--- a/arch/arm/mach-omap2/omap3-iommu.c
+++ /dev/null
@@ -1,105 +0,0 @@
-/*
- * omap iommu: omap3 device registration
- *
- * Copyright (C) 2008-2009 Nokia Corporation
- *
- * Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/platform_device.h>
-
-#include <plat/iommu.h>
-
-struct iommu_device {
-	resource_size_t base;
-	int irq;
-	struct iommu_platform_data pdata;
-	struct resource res[2];
-};
-
-static struct iommu_device devices[] = {
-	{
-		.base = 0x480bd400,
-		.irq = 24,
-		.pdata = {
-			.name = "isp",
-			.nr_tlb_entries = 8,
-			.clk_name = "cam_ick",
-		},
-	},
-#if defined(CONFIG_MPU_BRIDGE_IOMMU)
-	{
-		.base = 0x5d000000,
-		.irq = 28,
-		.pdata = {
-			.name = "iva2",
-			.nr_tlb_entries = 32,
-			.clk_name = "iva2_ck",
-		},
-	},
-#endif
-};
-#define NR_IOMMU_DEVICES ARRAY_SIZE(devices)
-
-static struct platform_device *omap3_iommu_pdev[NR_IOMMU_DEVICES];
-
-static int __init omap3_iommu_init(void)
-{
-	int i, err;
-	struct resource res[] = {
-		{ .flags = IORESOURCE_MEM },
-		{ .flags = IORESOURCE_IRQ },
-	};
-
-	for (i = 0; i < NR_IOMMU_DEVICES; i++) {
-		struct platform_device *pdev;
-		const struct iommu_device *d = &devices[i];
-
-		pdev = platform_device_alloc("omap-iommu", i);
-		if (!pdev) {
-			err = -ENOMEM;
-			goto err_out;
-		}
-
-		res[0].start = d->base;
-		res[0].end = d->base + MMU_REG_SIZE - 1;
-		res[1].start = res[1].end = d->irq;
-
-		err = platform_device_add_resources(pdev, res,
-						    ARRAY_SIZE(res));
-		if (err)
-			goto err_out;
-		err = platform_device_add_data(pdev, &d->pdata,
-					       sizeof(d->pdata));
-		if (err)
-			goto err_out;
-		err = platform_device_add(pdev);
-		if (err)
-			goto err_out;
-		omap3_iommu_pdev[i] = pdev;
-	}
-	return 0;
-
-err_out:
-	while (i--)
-		platform_device_put(omap3_iommu_pdev[i]);
-	return err;
-}
-module_init(omap3_iommu_init);
-
-static void __exit omap3_iommu_exit(void)
-{
-	int i;
-
-	for (i = 0; i < NR_IOMMU_DEVICES; i++)
-		platform_device_unregister(omap3_iommu_pdev[i]);
-}
-module_exit(omap3_iommu_exit);
-
-MODULE_AUTHOR("Hiroshi DOYU");
-MODULE_DESCRIPTION("omap iommu: omap3 device registration");
-MODULE_LICENSE("GPL v2");
diff --git a/arch/arm/plat-omap/Kconfig b/arch/arm/plat-omap/Kconfig
index 6da796ef82b..78b49a626d0 100644
--- a/arch/arm/plat-omap/Kconfig
+++ b/arch/arm/plat-omap/Kconfig
@@ -110,8 +110,13 @@ config OMAP_IOMMU
 	tristate
 
 config OMAP_IOMMU_DEBUG
-	depends on OMAP_IOMMU
-	tristate
+       tristate "Export OMAP IOMMU internals in DebugFS"
+       depends on OMAP_IOMMU && DEBUG_FS
+       help
+         Select this to see extensive information about
+         the internal state of OMAP IOMMU in debugfs.
+
+         Say N unless you know you need this.
 
 choice
 	prompt "System timer"
diff --git a/arch/arm/plat-omap/include/plat/omap44xx.h b/arch/arm/plat-omap/include/plat/omap44xx.h
index b3ef1a7f53c..bb94a0baee8 100644
--- a/arch/arm/plat-omap/include/plat/omap44xx.h
+++ b/arch/arm/plat-omap/include/plat/omap44xx.h
@@ -48,5 +48,8 @@
 #define OMAP44XX_MAILBOX_BASE		(L4_44XX_BASE + 0xF4000)
 #define OMAP44XX_HSUSB_OTG_BASE		(L4_44XX_BASE + 0xAB000)
 
+#define OMAP4_MMU1_BASE			0x55082000
+#define OMAP4_MMU2_BASE			0x4A066000
+
 #endif /* __ASM_ARCH_OMAP44XX_H */
 
diff --git a/arch/arm/plat-omap/iommu.c b/arch/arm/plat-omap/iommu.c
index 0e137663349..bc094dbacee 100644
--- a/arch/arm/plat-omap/iommu.c
+++ b/arch/arm/plat-omap/iommu.c
@@ -25,6 +25,11 @@
 
 #include "iopgtable.h"
 
+#define for_each_iotlb_cr(obj, n, __i, cr)				\
+	for (__i = 0;							\
+	     (__i < (n)) && (cr = __iotlb_read_cr((obj), __i), true);	\
+	     __i++)
+
 /* accommodate the difference between omap1 and omap2/3 */
 static const struct iommu_functions *arch_iommu;
 
@@ -172,15 +177,12 @@ static void iotlb_lock_get(struct iommu *obj, struct iotlb_lock *l)
 	l->base = MMU_LOCK_BASE(val);
 	l->vict = MMU_LOCK_VICT(val);
 
-	BUG_ON(l->base != 0); /* Currently no preservation is used */
 }
 
 static void iotlb_lock_set(struct iommu *obj, struct iotlb_lock *l)
 {
 	u32 val;
 
-	BUG_ON(l->base != 0); /* Currently no preservation is used */
-
 	val = (l->base << MMU_LOCK_BASE_SHIFT);
 	val |= (l->vict << MMU_LOCK_VICT_SHIFT);
 
@@ -214,6 +216,20 @@ static inline ssize_t iotlb_dump_cr(struct iommu *obj, struct cr_regs *cr,
 	return arch_iommu->dump_cr(obj, cr, buf);
 }
 
+/* only used in iotlb iteration for-loop */
+static struct cr_regs __iotlb_read_cr(struct iommu *obj, int n)
+{
+	struct cr_regs cr;
+	struct iotlb_lock l;
+
+	iotlb_lock_get(obj, &l);
+	l.vict = n;
+	iotlb_lock_set(obj, &l);
+	iotlb_read_cr(obj, &cr);
+
+	return cr;
+}
+
 /**
  * load_iotlb_entry - Set an iommu tlb entry
  * @obj:	target iommu
@@ -221,7 +237,6 @@ static inline ssize_t iotlb_dump_cr(struct iommu *obj, struct cr_regs *cr,
  **/
 int load_iotlb_entry(struct iommu *obj, struct iotlb_entry *e)
 {
-	int i;
 	int err = 0;
 	struct iotlb_lock l;
 	struct cr_regs *cr;
@@ -231,21 +246,30 @@ int load_iotlb_entry(struct iommu *obj, struct iotlb_entry *e)
 
 	clk_enable(obj->clk);
 
-	for (i = 0; i < obj->nr_tlb_entries; i++) {
+	iotlb_lock_get(obj, &l);
+	if (l.base == obj->nr_tlb_entries) {
+		dev_warn(obj->dev, "%s: preserve entries full\n", __func__);
+		err = -EBUSY;
+		goto out;
+	}
+	if (!e->prsvd) {
+		int i;
 		struct cr_regs tmp;
 
+		for_each_iotlb_cr(obj, obj->nr_tlb_entries, i, tmp)
+			if (!iotlb_cr_valid(&tmp))
+				break;
+
+		if (i == obj->nr_tlb_entries) {
+			dev_dbg(obj->dev, "%s: full: no entry\n", __func__);
+			err = -EBUSY;
+			goto out;
+		}
+
 		iotlb_lock_get(obj, &l);
-		l.vict = i;
+	} else {
+		l.vict = l.base;
 		iotlb_lock_set(obj, &l);
-		iotlb_read_cr(obj, &tmp);
-		if (!iotlb_cr_valid(&tmp))
-			break;
-	}
-
-	if (i == obj->nr_tlb_entries) {
-		dev_dbg(obj->dev, "%s: full: no entry\n", __func__);
-		err = -EBUSY;
-		goto out;
 	}
 
 	cr = iotlb_alloc_cr(obj, e);
@@ -257,9 +281,11 @@ int load_iotlb_entry(struct iommu *obj, struct iotlb_entry *e)
 	iotlb_load_cr(obj, cr);
 	kfree(cr);
 
+	if (e->prsvd)
+		l.base++;
 	/* increment victim for next tlb load */
 	if (++l.vict == obj->nr_tlb_entries)
-		l.vict = 0;
+		l.vict = l.base;
 	iotlb_lock_set(obj, &l);
 out:
 	clk_disable(obj->clk);
@@ -276,20 +302,15 @@ EXPORT_SYMBOL_GPL(load_iotlb_entry);
  **/
 void flush_iotlb_page(struct iommu *obj, u32 da)
 {
-	struct iotlb_lock l;
 	int i;
+	struct cr_regs cr;
 
 	clk_enable(obj->clk);
 
-	for (i = 0; i < obj->nr_tlb_entries; i++) {
-		struct cr_regs cr;
+	for_each_iotlb_cr(obj, obj->nr_tlb_entries, i, cr) {
 		u32 start;
 		size_t bytes;
 
-		iotlb_lock_get(obj, &l);
-		l.vict = i;
-		iotlb_lock_set(obj, &l);
-		iotlb_read_cr(obj, &cr);
 		if (!iotlb_cr_valid(&cr))
 			continue;
 
@@ -299,7 +320,6 @@ void flush_iotlb_page(struct iommu *obj, u32 da)
 		if ((start <= da) && (da < start + bytes)) {
 			dev_dbg(obj->dev, "%s: %08x<=%08x(%x)\n",
 				__func__, start, da, bytes);
-			iotlb_load_cr(obj, &cr);
 			iommu_write_reg(obj, 1, MMU_FLUSH_ENTRY);
 		}
 	}
@@ -370,26 +390,19 @@ EXPORT_SYMBOL_GPL(iommu_dump_ctx);
 static int __dump_tlb_entries(struct iommu *obj, struct cr_regs *crs, int num)
 {
 	int i;
-	struct iotlb_lock saved, l;
+	struct iotlb_lock saved;
+	struct cr_regs tmp;
 	struct cr_regs *p = crs;
 
 	clk_enable(obj->clk);
-
 	iotlb_lock_get(obj, &saved);
-	memcpy(&l, &saved, sizeof(saved));
 
-	for (i = 0; i < num; i++) {
-		struct cr_regs tmp;
-
-		iotlb_lock_get(obj, &l);
-		l.vict = i;
-		iotlb_lock_set(obj, &l);
-		iotlb_read_cr(obj, &tmp);
+	for_each_iotlb_cr(obj, num, i, tmp) {
 		if (!iotlb_cr_valid(&tmp))
 			continue;
-
 		*p++ = tmp;
 	}
+
 	iotlb_lock_set(obj, &saved);
 	clk_disable(obj->clk);
 
@@ -503,6 +516,12 @@ static int iopgd_alloc_section(struct iommu *obj, u32 da, u32 pa, u32 prot)
 {
 	u32 *iopgd = iopgd_offset(obj, da);
 
+	if ((da | pa) & ~IOSECTION_MASK) {
+		dev_err(obj->dev, "%s: %08x:%08x should aligned on %08lx\n",
+			__func__, da, pa, IOSECTION_SIZE);
+		return -EINVAL;
+	}
+
 	*iopgd = (pa & IOSECTION_MASK) | prot | IOPGD_SECTION;
 	flush_iopgd_range(iopgd, iopgd);
 	return 0;
@@ -513,6 +532,12 @@ static int iopgd_alloc_super(struct iommu *obj, u32 da, u32 pa, u32 prot)
 	u32 *iopgd = iopgd_offset(obj, da);
 	int i;
 
+	if ((da | pa) & ~IOSUPER_MASK) {
+		dev_err(obj->dev, "%s: %08x:%08x should aligned on %08lx\n",
+			__func__, da, pa, IOSUPER_SIZE);
+		return -EINVAL;
+	}
+
 	for (i = 0; i < 16; i++)
 		*(iopgd + i) = (pa & IOSUPER_MASK) | prot | IOPGD_SUPER;
 	flush_iopgd_range(iopgd, iopgd + 15);
@@ -542,6 +567,12 @@ static int iopte_alloc_large(struct iommu *obj, u32 da, u32 pa, u32 prot)
 	u32 *iopte = iopte_alloc(obj, iopgd, da);
 	int i;
 
+	if ((da | pa) & ~IOLARGE_MASK) {
+		dev_err(obj->dev, "%s: %08x:%08x should aligned on %08lx\n",
+			__func__, da, pa, IOLARGE_SIZE);
+		return -EINVAL;
+	}
+
 	if (IS_ERR(iopte))
 		return PTR_ERR(iopte);
 
diff --git a/arch/arm/plat-omap/iovmm.c b/arch/arm/plat-omap/iovmm.c
index 65c6d1ff723..e43983ba59c 100644
--- a/arch/arm/plat-omap/iovmm.c
+++ b/arch/arm/plat-omap/iovmm.c
@@ -287,16 +287,19 @@ static struct iovm_struct *alloc_iovm_area(struct iommu *obj, u32 da,
 	prev_end = 0;
 	list_for_each_entry(tmp, &obj->mmap, list) {
 
-		if ((prev_end <= start) && (start + bytes < tmp->da_start))
+		if (prev_end >= start)
+			break;
+
+		if (start + bytes < tmp->da_start)
 			goto found;
 
 		if (flags & IOVMF_DA_ANON)
-			start = roundup(tmp->da_end, alignement);
+			start = roundup(tmp->da_end + 1, alignement);
 
 		prev_end = tmp->da_end;
 	}
 
-	if ((start >= prev_end) && (ULONG_MAX - start >= bytes))
+	if ((start > prev_end) && (ULONG_MAX - start >= bytes))
 		goto found;
 
 	dev_dbg(obj->dev, "%s: no space to fit %08x(%x) flags: %08x\n",