Merge branch 'for_2.6.38' of git://gitorious.org/iommu_mailbox/iommu_…

…mailbox into devel-iommu-mailbox

arch/arm/mach-omap2/mailbox.c

@@ -281,7 +281,7 @@ static struct omap_mbox_ops omap2_mbox_ops = {
 
 /* FIXME: the following structs should be filled automatically by the user id */
 
-#if defined(CONFIG_ARCH_OMAP3430) || defined(CONFIG_ARCH_OMAP2420)
+#if defined(CONFIG_ARCH_OMAP3) || defined(CONFIG_ARCH_OMAP2)
 /* DSP */
 static struct omap_mbox2_priv omap2_mbox_dsp_priv = {
 	.tx_fifo = {
@@ -306,7 +306,7 @@ struct omap_mbox mbox_dsp_info = {
 };
 #endif
 
-#if defined(CONFIG_ARCH_OMAP3430)
+#if defined(CONFIG_ARCH_OMAP3)
 struct omap_mbox *omap3_mboxes[] = { &mbox_dsp_info, NULL };
 #endif
 
@@ -394,15 +394,19 @@ static int __devinit omap2_mbox_probe(struct platform_device *pdev)
 
 	if (false)
 		;
-#if defined(CONFIG_ARCH_OMAP3430)
-	else if (cpu_is_omap3430()) {
+#if defined(CONFIG_ARCH_OMAP3)
+	else if (cpu_is_omap34xx()) {
 		list = omap3_mboxes;
 
 		list[0]->irq = platform_get_irq_byname(pdev, "dsp");
 	}
 #endif
-#if defined(CONFIG_ARCH_OMAP2420)
-	else if (cpu_is_omap2420()) {
+#if defined(CONFIG_ARCH_OMAP2)
+	else if (cpu_is_omap2430()) {
+		list = omap2_mboxes;
+
+		list[0]->irq = platform_get_irq_byname(pdev, "dsp");
+	} else if (cpu_is_omap2420()) {
 		list = omap2_mboxes;
 
 		list[0]->irq = platform_get_irq_byname(pdev, "dsp");
@@ -432,9 +436,8 @@ static int __devinit omap2_mbox_probe(struct platform_device *pdev)
 		iounmap(mbox_base);
 		return ret;
 	}
-	return 0;
 
-	return ret;
+	return 0;
 }
 
 static int __devexit omap2_mbox_remove(struct platform_device *pdev)

arch/arm/mach-omap2/omap-iommu.c

@@ -33,16 +33,20 @@ static struct iommu_device omap3_devices[] = {
 			.name = "isp",
 			.nr_tlb_entries = 8,
 			.clk_name = "cam_ick",
+			.da_start = 0x0,
+			.da_end = 0xFFFFF000,
 		},
 	},
-#if defined(CONFIG_MPU_BRIDGE_IOMMU)
+#if defined(CONFIG_OMAP_IOMMU_IVA2)
 	{
 		.base = 0x5d000000,
 		.irq = 28,
 		.pdata = {
 			.name = "iva2",
 			.nr_tlb_entries = 32,
 			.clk_name = "iva2_ck",
+			.da_start = 0x11000000,
+			.da_end = 0xFFFFF000,
 		},
 	},
 #endif
@@ -64,6 +68,8 @@ static struct iommu_device omap4_devices[] = {
 			.name = "ducati",
 			.nr_tlb_entries = 32,
 			.clk_name = "ducati_ick",
+			.da_start = 0x0,
+			.da_end = 0xFFFFF000,
 		},
 	},
 #if defined(CONFIG_MPU_TESLA_IOMMU)
@@ -74,6 +80,8 @@ static struct iommu_device omap4_devices[] = {
 			.name = "tesla",
 			.nr_tlb_entries = 32,
 			.clk_name = "tesla_ick",
+			.da_start = 0x0,
+			.da_end = 0xFFFFF000,
 		},
 	},
 #endif

arch/arm/plat-omap/Kconfig

@@ -109,6 +109,9 @@ config OMAP_IOMMU_DEBUG
 
          Say N unless you know you need this.
 
+config OMAP_IOMMU_IVA2
+	bool
+
 choice
 	prompt "System timer"
 	default OMAP_32K_TIMER if !ARCH_OMAP15XX

arch/arm/plat-omap/include/plat/iommu.h

@@ -50,6 +50,8 @@ struct iommu {
 	int (*isr)(struct iommu *obj);
 
 	void *ctx; /* iommu context: registres saved area */
+	u32 da_start;
+	u32 da_end;
 };
 
 struct cr_regs {
@@ -103,6 +105,8 @@ struct iommu_platform_data {
 	const char *name;
 	const char *clk_name;
 	const int nr_tlb_entries;
+	u32 da_start;
+	u32 da_end;
 };
 
 #if defined(CONFIG_ARCH_OMAP1)
@@ -152,6 +156,7 @@ extern void flush_iotlb_all(struct iommu *obj);
 extern int iopgtable_store_entry(struct iommu *obj, struct iotlb_entry *e);
 extern size_t iopgtable_clear_entry(struct iommu *obj, u32 iova);
 
+extern int iommu_set_da_range(struct iommu *obj, u32 start, u32 end);
 extern struct iommu *iommu_get(const char *name);
 extern void iommu_put(struct iommu *obj);
 

arch/arm/plat-omap/include/plat/mailbox.h

@@ -46,8 +46,8 @@ struct omap_mbox_queue {
 	struct kfifo		fifo;
 	struct work_struct	work;
 	struct tasklet_struct	tasklet;
-	int	(*callback)(void *);
 	struct omap_mbox	*mbox;
+	bool full;
 };
 
 struct omap_mbox {
@@ -57,13 +57,15 @@ struct omap_mbox {
 	struct omap_mbox_ops	*ops;
 	struct device		*dev;
 	void			*priv;
+	int			use_count;
+	struct blocking_notifier_head   notifier;
 };
 
 int omap_mbox_msg_send(struct omap_mbox *, mbox_msg_t msg);
 void omap_mbox_init_seq(struct omap_mbox *);
 
-struct omap_mbox *omap_mbox_get(const char *);
-void omap_mbox_put(struct omap_mbox *);
+struct omap_mbox *omap_mbox_get(const char *, struct notifier_block *nb);
+void omap_mbox_put(struct omap_mbox *mbox, struct notifier_block *nb);
 
 int omap_mbox_register(struct device *parent, struct omap_mbox **);
 int omap_mbox_unregister(void);

arch/arm/plat-omap/iommu.c

@@ -829,6 +829,28 @@ static int device_match_by_alias(struct device *dev, void *data)
 	return strcmp(obj->name, name) == 0;
 }
 
+/**
+ * iommu_set_da_range - Set a valid device address range
+ * @obj:		target iommu
+ * @start		Start of valid range
+ * @end			End of valid range
+ **/
+int iommu_set_da_range(struct iommu *obj, u32 start, u32 end)
+{
+
+	if (!obj)
+		return -EFAULT;
+
+	if (end < start || !PAGE_ALIGN(start | end))
+		return -EINVAL;
+
+	obj->da_start = start;
+	obj->da_end = end;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(iommu_set_da_range);
+
 /**
  * iommu_get - Get iommu handler
  * @name:	target iommu name
@@ -922,6 +944,8 @@ static int __devinit omap_iommu_probe(struct platform_device *pdev)
 	obj->name = pdata->name;
 	obj->dev = &pdev->dev;
 	obj->ctx = (void *)obj + sizeof(*obj);
+	obj->da_start = pdata->da_start;
+	obj->da_end = pdata->da_end;
 
 	mutex_init(&obj->iommu_lock);
 	mutex_init(&obj->mmap_lock);

arch/arm/plat-omap/iovmm.c

@@ -87,35 +87,43 @@ static size_t sgtable_len(const struct sg_table *sgt)
 }
 #define sgtable_ok(x)	(!!sgtable_len(x))
 
+static unsigned max_alignment(u32 addr)
+{
+	int i;
+	unsigned pagesize[] = { SZ_16M, SZ_1M, SZ_64K, SZ_4K, };
+	for (i = 0; i < ARRAY_SIZE(pagesize) && addr & (pagesize[i] - 1); i++)
+		;
+	return (i < ARRAY_SIZE(pagesize)) ? pagesize[i] : 0;
+}
+
 /*
  * calculate the optimal number sg elements from total bytes based on
  * iommu superpages
  */
-static unsigned int sgtable_nents(size_t bytes)
+static unsigned sgtable_nents(size_t bytes, u32 da, u32 pa)
 {
-	int i;
-	unsigned int nr_entries;
-	const unsigned long pagesize[] = { SZ_16M, SZ_1M, SZ_64K, SZ_4K, };
+	unsigned nr_entries = 0, ent_sz;
 
 	if (!IS_ALIGNED(bytes, PAGE_SIZE)) {
 		pr_err("%s: wrong size %08x\n", __func__, bytes);
 		return 0;
 	}
 
-	nr_entries = 0;
-	for (i = 0; i < ARRAY_SIZE(pagesize); i++) {
-		if (bytes >= pagesize[i]) {
-			nr_entries += (bytes / pagesize[i]);
-			bytes %= pagesize[i];
-		}
+	while (bytes) {
+		ent_sz = max_alignment(da | pa);
+		ent_sz = min_t(unsigned, ent_sz, iopgsz_max(bytes));
+		nr_entries++;
+		da += ent_sz;
+		pa += ent_sz;
+		bytes -= ent_sz;
 	}
-	BUG_ON(bytes);
 
 	return nr_entries;
 }
 
 /* allocate and initialize sg_table header(a kind of 'superblock') */
-static struct sg_table *sgtable_alloc(const size_t bytes, u32 flags)
+static struct sg_table *sgtable_alloc(const size_t bytes, u32 flags,
+							u32 da, u32 pa)
 {
 	unsigned int nr_entries;
 	int err;
@@ -127,9 +135,8 @@ static struct sg_table *sgtable_alloc(const size_t bytes, u32 flags)
 	if (!IS_ALIGNED(bytes, PAGE_SIZE))
 		return ERR_PTR(-EINVAL);
 
-	/* FIXME: IOVMF_DA_FIXED should support 'superpages' */
-	if ((flags & IOVMF_LINEAR) && (flags & IOVMF_DA_ANON)) {
-		nr_entries = sgtable_nents(bytes);
+	if (flags & IOVMF_LINEAR) {
+		nr_entries = sgtable_nents(bytes, da, pa);
 		if (!nr_entries)
 			return ERR_PTR(-EINVAL);
 	} else
@@ -273,13 +280,14 @@ static struct iovm_struct *alloc_iovm_area(struct iommu *obj, u32 da,
 	alignement = PAGE_SIZE;
 
 	if (flags & IOVMF_DA_ANON) {
-		/*
-		 * Reserve the first page for NULL
-		 */
-		start = PAGE_SIZE;
+		start = obj->da_start;
+
 		if (flags & IOVMF_LINEAR)
 			alignement = iopgsz_max(bytes);
 		start = roundup(start, alignement);
+	} else if (start < obj->da_start || start > obj->da_end ||
+					obj->da_end - start < bytes) {
+		return ERR_PTR(-EINVAL);
 	}
 
 	tmp = NULL;
@@ -289,19 +297,19 @@ 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)
+		if (prev_end > start)
 			break;
 
-		if (start + bytes < tmp->da_start)
+		if (tmp->da_start > start && (tmp->da_start - start) >= bytes)
 			goto found;
 
-		if (flags & IOVMF_DA_ANON)
+		if (tmp->da_end >= start && flags & IOVMF_DA_ANON)
 			start = roundup(tmp->da_end + 1, alignement);
 
 		prev_end = tmp->da_end;
 	}
 
-	if ((start > prev_end) && (ULONG_MAX - start >= bytes))
+	if ((start >= prev_end) && (obj->da_end - start >= bytes))
 		goto found;
 
 	dev_dbg(obj->dev, "%s: no space to fit %08x(%x) flags: %08x\n",
@@ -409,7 +417,8 @@ static inline void sgtable_drain_vmalloc(struct sg_table *sgt)
 	BUG_ON(!sgt);
 }
 
-static void sgtable_fill_kmalloc(struct sg_table *sgt, u32 pa, size_t len)
+static void sgtable_fill_kmalloc(struct sg_table *sgt, u32 pa, u32 da,
+								size_t len)
 {
 	unsigned int i;
 	struct scatterlist *sg;
@@ -418,9 +427,10 @@ static void sgtable_fill_kmalloc(struct sg_table *sgt, u32 pa, size_t len)
 	va = phys_to_virt(pa);
 
 	for_each_sg(sgt->sgl, sg, sgt->nents, i) {
-		size_t bytes;
+		unsigned bytes;
 
-		bytes = iopgsz_max(len);
+		bytes = max_alignment(da | pa);
+		bytes = min_t(unsigned, bytes, iopgsz_max(len));
 
 		BUG_ON(!iopgsz_ok(bytes));
 
@@ -429,6 +439,7 @@ static void sgtable_fill_kmalloc(struct sg_table *sgt, u32 pa, size_t len)
 		 * 'pa' is cotinuous(linear).
 		 */
 		pa += bytes;
+		da += bytes;
 		len -= bytes;
 	}
 	BUG_ON(len);
@@ -695,18 +706,18 @@ u32 iommu_vmalloc(struct iommu *obj, u32 da, size_t bytes, u32 flags)
 	if (!va)
 		return -ENOMEM;
 
-	sgt = sgtable_alloc(bytes, flags);
+	flags &= IOVMF_HW_MASK;
+	flags |= IOVMF_DISCONT;
+	flags |= IOVMF_ALLOC;
+	flags |= (da ? IOVMF_DA_FIXED : IOVMF_DA_ANON);
+
+	sgt = sgtable_alloc(bytes, flags, da, 0);
 	if (IS_ERR(sgt)) {
 		da = PTR_ERR(sgt);
 		goto err_sgt_alloc;
 	}
 	sgtable_fill_vmalloc(sgt, va);
 
-	flags &= IOVMF_HW_MASK;
-	flags |= IOVMF_DISCONT;
-	flags |= IOVMF_ALLOC;
-	flags |= (da ? IOVMF_DA_FIXED : IOVMF_DA_ANON);
-
 	da = __iommu_vmap(obj, da, sgt, va, bytes, flags);
 	if (IS_ERR_VALUE(da))
 		goto err_iommu_vmap;
@@ -746,11 +757,11 @@ static u32 __iommu_kmap(struct iommu *obj, u32 da, u32 pa, void *va,
 {
 	struct sg_table *sgt;
 
-	sgt = sgtable_alloc(bytes, flags);
+	sgt = sgtable_alloc(bytes, flags, da, pa);
 	if (IS_ERR(sgt))
 		return PTR_ERR(sgt);
 
-	sgtable_fill_kmalloc(sgt, pa, bytes);
+	sgtable_fill_kmalloc(sgt, pa, da, bytes);
 
 	da = map_iommu_region(obj, da, sgt, va, bytes, flags);
 	if (IS_ERR_VALUE(da)) {
@@ -811,7 +822,7 @@ void iommu_kunmap(struct iommu *obj, u32 da)
 	struct sg_table *sgt;
 	typedef void (*func_t)(const void *);
 
-	sgt = unmap_vm_area(obj, da, (func_t)__iounmap,
+	sgt = unmap_vm_area(obj, da, (func_t)iounmap,
 			    IOVMF_LINEAR | IOVMF_MMIO);
 	if (!sgt)
 		dev_dbg(obj->dev, "%s: No sgt\n", __func__);