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From: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
To: <linux-arm-kernel@lists.infradead.org>,
	<linux-acpi@vger.kernel.org>, <iommu@lists.linux-foundation.org>
Cc: <linuxarm@huawei.com>, <lorenzo.pieralisi@arm.com>,
	<joro@8bytes.org>, <robin.murphy@arm.com>,
	<wanghuiqiang@huawei.com>, <guohanjun@huawei.com>,
	<steven.price@arm.com>, <Sami.Mujawar@arm.com>,
	<jon@solid-run.com>, <eric.auger@redhat.com>,
	<yangyicong@huawei.com>
Subject: [PATCH v4 2/8] iommu/dma: Introduce generic helper to retrieve RMR info
Date: Thu, 13 May 2021 14:45:44 +0100	[thread overview]
Message-ID: <20210513134550.2117-3-shameerali.kolothum.thodi@huawei.com> (raw)
In-Reply-To: <20210513134550.2117-1-shameerali.kolothum.thodi@huawei.com>

Reserved Memory Regions(RMR) associated with an IOMMU can be
described through ACPI IORT tables in systems with devices
that require a unity mapping or bypass for those
regions.

Introduce a generic interface so that IOMMU drivers can retrieve
and set up necessary mappings.

Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
---
 drivers/iommu/dma-iommu.c | 33 +++++++++++++++++++++++++++++++++
 include/linux/dma-iommu.h | 10 ++++++++++
 include/linux/iommu.h     | 19 +++++++++++++++++++
 3 files changed, 62 insertions(+)

diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index 7bcdd1205535..674bd8815159 100644
--- a/drivers/iommu/dma-iommu.c
+++ b/drivers/iommu/dma-iommu.c
@@ -193,6 +193,39 @@ void iommu_dma_get_resv_regions(struct device *dev, struct list_head *list)
 }
 EXPORT_SYMBOL(iommu_dma_get_resv_regions);
 
+/**
+ * iommu_dma_get_rmrs - Retrieve Reserved Memory Regions(RMRs) associated
+ *                      with a given IOMMU
+ * @iommu_fwnode: fwnode associated with IOMMU
+ * @list: RMR list to be populated
+ *
+ */
+int iommu_dma_get_rmrs(struct fwnode_handle *iommu_fwnode,
+		       struct list_head *list)
+{
+	return -EINVAL;
+}
+EXPORT_SYMBOL(iommu_dma_get_rmrs);
+
+struct iommu_rmr *iommu_dma_alloc_rmr(u64 base, u64 length, u32 sid,
+				      u32 flags)
+{
+	struct iommu_rmr *rmr;
+
+	rmr = kzalloc(sizeof(*rmr), GFP_KERNEL);
+	if (!rmr)
+		return NULL;
+
+	INIT_LIST_HEAD(&rmr->list);
+	rmr->base_address = base;
+	rmr->length = length;
+	rmr->sid = sid;
+	rmr->flags = flags;
+
+	return rmr;
+}
+EXPORT_SYMBOL(iommu_dma_alloc_rmr);
+
 static int cookie_init_hw_msi_region(struct iommu_dma_cookie *cookie,
 		phys_addr_t start, phys_addr_t end)
 {
diff --git a/include/linux/dma-iommu.h b/include/linux/dma-iommu.h
index 6e75a2d689b4..319f332c279f 100644
--- a/include/linux/dma-iommu.h
+++ b/include/linux/dma-iommu.h
@@ -42,12 +42,17 @@ void iommu_dma_free_cpu_cached_iovas(unsigned int cpu,
 
 extern bool iommu_dma_forcedac;
 
+int iommu_dma_get_rmrs(struct fwnode_handle *iommu, struct list_head *list);
+struct iommu_rmr *iommu_dma_alloc_rmr(u64 base, u64 length, u32 sid, u32 flags);
+
 #else /* CONFIG_IOMMU_DMA */
 
 struct iommu_domain;
 struct msi_desc;
 struct msi_msg;
 struct device;
+struct fwnode_handle;
+struct iommu_rmr;
 
 static inline void iommu_setup_dma_ops(struct device *dev, u64 dma_base,
 		u64 size)
@@ -83,5 +88,10 @@ static inline void iommu_dma_get_resv_regions(struct device *dev, struct list_he
 {
 }
 
+int iommu_dma_get_rmrs(struct fwnode_handle *iommu, struct list_head *list)
+{
+	return -ENODEV;
+}
+
 #endif	/* CONFIG_IOMMU_DMA */
 #endif	/* __DMA_IOMMU_H */
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 32d448050bf7..73cd2831cb45 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -555,6 +555,25 @@ struct iommu_sva {
 	struct device			*dev;
 };
 
+/**
+ * struct iommu_rmr - Reserved Memory Region details per IOMMU
+ * @list: Linked list pointers to hold RMR region info
+ * @base_address: base address of Reserved Memory Region
+ * @length: length of memory region
+ * @sid: associated stream id
+ * @flags: flags that apply to the RMR node
+ */
+struct iommu_rmr {
+	struct list_head	list;
+	phys_addr_t		base_address;
+	u64			length;
+	u32			sid;
+	u32			flags;
+};
+
+/* RMR Remap permitted */
+#define IOMMU_RMR_REMAP_PERMITTED	(1 << 0)
+
 int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode,
 		      const struct iommu_ops *ops);
 void iommu_fwspec_free(struct device *dev);
-- 
2.17.1


WARNING: multiple messages have this Message-ID
From: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
To: <linux-arm-kernel@lists.infradead.org>,
	<linux-acpi@vger.kernel.org>, <iommu@lists.linux-foundation.org>
Cc: jon@solid-run.com, linuxarm@huawei.com, steven.price@arm.com,
	guohanjun@huawei.com, yangyicong@huawei.com,
	Sami.Mujawar@arm.com, robin.murphy@arm.com,
	wanghuiqiang@huawei.com
Subject: [PATCH v4 2/8] iommu/dma: Introduce generic helper to retrieve RMR info
Date: Thu, 13 May 2021 14:45:44 +0100	[thread overview]
Message-ID: <20210513134550.2117-3-shameerali.kolothum.thodi@huawei.com> (raw)
In-Reply-To: <20210513134550.2117-1-shameerali.kolothum.thodi@huawei.com>

Reserved Memory Regions(RMR) associated with an IOMMU can be
described through ACPI IORT tables in systems with devices
that require a unity mapping or bypass for those
regions.

Introduce a generic interface so that IOMMU drivers can retrieve
and set up necessary mappings.

Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
---
 drivers/iommu/dma-iommu.c | 33 +++++++++++++++++++++++++++++++++
 include/linux/dma-iommu.h | 10 ++++++++++
 include/linux/iommu.h     | 19 +++++++++++++++++++
 3 files changed, 62 insertions(+)

diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index 7bcdd1205535..674bd8815159 100644
--- a/drivers/iommu/dma-iommu.c
+++ b/drivers/iommu/dma-iommu.c
@@ -193,6 +193,39 @@ void iommu_dma_get_resv_regions(struct device *dev, struct list_head *list)
 }
 EXPORT_SYMBOL(iommu_dma_get_resv_regions);
 
+/**
+ * iommu_dma_get_rmrs - Retrieve Reserved Memory Regions(RMRs) associated
+ *                      with a given IOMMU
+ * @iommu_fwnode: fwnode associated with IOMMU
+ * @list: RMR list to be populated
+ *
+ */
+int iommu_dma_get_rmrs(struct fwnode_handle *iommu_fwnode,
+		       struct list_head *list)
+{
+	return -EINVAL;
+}
+EXPORT_SYMBOL(iommu_dma_get_rmrs);
+
+struct iommu_rmr *iommu_dma_alloc_rmr(u64 base, u64 length, u32 sid,
+				      u32 flags)
+{
+	struct iommu_rmr *rmr;
+
+	rmr = kzalloc(sizeof(*rmr), GFP_KERNEL);
+	if (!rmr)
+		return NULL;
+
+	INIT_LIST_HEAD(&rmr->list);
+	rmr->base_address = base;
+	rmr->length = length;
+	rmr->sid = sid;
+	rmr->flags = flags;
+
+	return rmr;
+}
+EXPORT_SYMBOL(iommu_dma_alloc_rmr);
+
 static int cookie_init_hw_msi_region(struct iommu_dma_cookie *cookie,
 		phys_addr_t start, phys_addr_t end)
 {
diff --git a/include/linux/dma-iommu.h b/include/linux/dma-iommu.h
index 6e75a2d689b4..319f332c279f 100644
--- a/include/linux/dma-iommu.h
+++ b/include/linux/dma-iommu.h
@@ -42,12 +42,17 @@ void iommu_dma_free_cpu_cached_iovas(unsigned int cpu,
 
 extern bool iommu_dma_forcedac;
 
+int iommu_dma_get_rmrs(struct fwnode_handle *iommu, struct list_head *list);
+struct iommu_rmr *iommu_dma_alloc_rmr(u64 base, u64 length, u32 sid, u32 flags);
+
 #else /* CONFIG_IOMMU_DMA */
 
 struct iommu_domain;
 struct msi_desc;
 struct msi_msg;
 struct device;
+struct fwnode_handle;
+struct iommu_rmr;
 
 static inline void iommu_setup_dma_ops(struct device *dev, u64 dma_base,
 		u64 size)
@@ -83,5 +88,10 @@ static inline void iommu_dma_get_resv_regions(struct device *dev, struct list_he
 {
 }
 
+int iommu_dma_get_rmrs(struct fwnode_handle *iommu, struct list_head *list)
+{
+	return -ENODEV;
+}
+
 #endif	/* CONFIG_IOMMU_DMA */
 #endif	/* __DMA_IOMMU_H */
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 32d448050bf7..73cd2831cb45 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -555,6 +555,25 @@ struct iommu_sva {
 	struct device			*dev;
 };
 
+/**
+ * struct iommu_rmr - Reserved Memory Region details per IOMMU
+ * @list: Linked list pointers to hold RMR region info
+ * @base_address: base address of Reserved Memory Region
+ * @length: length of memory region
+ * @sid: associated stream id
+ * @flags: flags that apply to the RMR node
+ */
+struct iommu_rmr {
+	struct list_head	list;
+	phys_addr_t		base_address;
+	u64			length;
+	u32			sid;
+	u32			flags;
+};
+
+/* RMR Remap permitted */
+#define IOMMU_RMR_REMAP_PERMITTED	(1 << 0)
+
 int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode,
 		      const struct iommu_ops *ops);
 void iommu_fwspec_free(struct device *dev);
-- 
2.17.1

_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu

WARNING: multiple messages have this Message-ID
From: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
To: <linux-arm-kernel@lists.infradead.org>,
	<linux-acpi@vger.kernel.org>, <iommu@lists.linux-foundation.org>
Cc: <linuxarm@huawei.com>, <lorenzo.pieralisi@arm.com>,
	<joro@8bytes.org>, <robin.murphy@arm.com>,
	<wanghuiqiang@huawei.com>, <guohanjun@huawei.com>,
	<steven.price@arm.com>, <Sami.Mujawar@arm.com>,
	<jon@solid-run.com>, <eric.auger@redhat.com>,
	<yangyicong@huawei.com>
Subject: [PATCH v4 2/8] iommu/dma: Introduce generic helper to retrieve RMR info
Date: Thu, 13 May 2021 14:45:44 +0100	[thread overview]
Message-ID: <20210513134550.2117-3-shameerali.kolothum.thodi@huawei.com> (raw)
In-Reply-To: <20210513134550.2117-1-shameerali.kolothum.thodi@huawei.com>

Reserved Memory Regions(RMR) associated with an IOMMU can be
described through ACPI IORT tables in systems with devices
that require a unity mapping or bypass for those
regions.

Introduce a generic interface so that IOMMU drivers can retrieve
and set up necessary mappings.

Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
---
 drivers/iommu/dma-iommu.c | 33 +++++++++++++++++++++++++++++++++
 include/linux/dma-iommu.h | 10 ++++++++++
 include/linux/iommu.h     | 19 +++++++++++++++++++
 3 files changed, 62 insertions(+)

diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index 7bcdd1205535..674bd8815159 100644
--- a/drivers/iommu/dma-iommu.c
+++ b/drivers/iommu/dma-iommu.c
@@ -193,6 +193,39 @@ void iommu_dma_get_resv_regions(struct device *dev, struct list_head *list)
 }
 EXPORT_SYMBOL(iommu_dma_get_resv_regions);
 
+/**
+ * iommu_dma_get_rmrs - Retrieve Reserved Memory Regions(RMRs) associated
+ *                      with a given IOMMU
+ * @iommu_fwnode: fwnode associated with IOMMU
+ * @list: RMR list to be populated
+ *
+ */
+int iommu_dma_get_rmrs(struct fwnode_handle *iommu_fwnode,
+		       struct list_head *list)
+{
+	return -EINVAL;
+}
+EXPORT_SYMBOL(iommu_dma_get_rmrs);
+
+struct iommu_rmr *iommu_dma_alloc_rmr(u64 base, u64 length, u32 sid,
+				      u32 flags)
+{
+	struct iommu_rmr *rmr;
+
+	rmr = kzalloc(sizeof(*rmr), GFP_KERNEL);
+	if (!rmr)
+		return NULL;
+
+	INIT_LIST_HEAD(&rmr->list);
+	rmr->base_address = base;
+	rmr->length = length;
+	rmr->sid = sid;
+	rmr->flags = flags;
+
+	return rmr;
+}
+EXPORT_SYMBOL(iommu_dma_alloc_rmr);
+
 static int cookie_init_hw_msi_region(struct iommu_dma_cookie *cookie,
 		phys_addr_t start, phys_addr_t end)
 {
diff --git a/include/linux/dma-iommu.h b/include/linux/dma-iommu.h
index 6e75a2d689b4..319f332c279f 100644
--- a/include/linux/dma-iommu.h
+++ b/include/linux/dma-iommu.h
@@ -42,12 +42,17 @@ void iommu_dma_free_cpu_cached_iovas(unsigned int cpu,
 
 extern bool iommu_dma_forcedac;
 
+int iommu_dma_get_rmrs(struct fwnode_handle *iommu, struct list_head *list);
+struct iommu_rmr *iommu_dma_alloc_rmr(u64 base, u64 length, u32 sid, u32 flags);
+
 #else /* CONFIG_IOMMU_DMA */
 
 struct iommu_domain;
 struct msi_desc;
 struct msi_msg;
 struct device;
+struct fwnode_handle;
+struct iommu_rmr;
 
 static inline void iommu_setup_dma_ops(struct device *dev, u64 dma_base,
 		u64 size)
@@ -83,5 +88,10 @@ static inline void iommu_dma_get_resv_regions(struct device *dev, struct list_he
 {
 }
 
+int iommu_dma_get_rmrs(struct fwnode_handle *iommu, struct list_head *list)
+{
+	return -ENODEV;
+}
+
 #endif	/* CONFIG_IOMMU_DMA */
 #endif	/* __DMA_IOMMU_H */
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 32d448050bf7..73cd2831cb45 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -555,6 +555,25 @@ struct iommu_sva {
 	struct device			*dev;
 };
 
+/**
+ * struct iommu_rmr - Reserved Memory Region details per IOMMU
+ * @list: Linked list pointers to hold RMR region info
+ * @base_address: base address of Reserved Memory Region
+ * @length: length of memory region
+ * @sid: associated stream id
+ * @flags: flags that apply to the RMR node
+ */
+struct iommu_rmr {
+	struct list_head	list;
+	phys_addr_t		base_address;
+	u64			length;
+	u32			sid;
+	u32			flags;
+};
+
+/* RMR Remap permitted */
+#define IOMMU_RMR_REMAP_PERMITTED	(1 << 0)
+
 int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode,
 		      const struct iommu_ops *ops);
 void iommu_fwspec_free(struct device *dev);
-- 
2.17.1


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  parent reply	other threads:[~2021-05-13 13:46 UTC|newest]

Thread overview: 51+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-13 13:45 [PATCH v4 0/8] ACPI/IORT: Support for IORT RMR node Shameer Kolothum
2021-05-13 13:45 ` Shameer Kolothum
2021-05-13 13:45 ` Shameer Kolothum
2021-05-13 13:45 ` [PATCH v4 1/8] ACPI/IORT: Add support for RMR node parsing Shameer Kolothum
2021-05-13 13:45   ` Shameer Kolothum
2021-05-13 13:45   ` Shameer Kolothum
2021-06-03 11:36   ` Lorenzo Pieralisi
2021-06-03 11:36     ` Lorenzo Pieralisi
2021-06-03 11:36     ` Lorenzo Pieralisi
2021-06-03 11:48     ` Shameerali Kolothum Thodi
2021-06-03 11:48       ` Shameerali Kolothum Thodi
2021-06-03 11:48       ` Shameerali Kolothum Thodi
2021-05-13 13:45 ` Shameer Kolothum [this message]
2021-05-13 13:45   ` [PATCH v4 2/8] iommu/dma: Introduce generic helper to retrieve RMR info Shameer Kolothum
2021-05-13 13:45   ` Shameer Kolothum
2021-05-18  8:49   ` Joerg Roedel
2021-05-18  8:49     ` Joerg Roedel
2021-05-18  8:49     ` Joerg Roedel
2021-05-19  9:30     ` Shameerali Kolothum Thodi
2021-05-19  9:30       ` Shameerali Kolothum Thodi
2021-05-19  9:30       ` Shameerali Kolothum Thodi
2021-05-19 11:48       ` Robin Murphy
2021-05-19 11:48         ` Robin Murphy
2021-05-19 11:48         ` Robin Murphy
2021-05-13 13:45 ` [PATCH v4 3/8] ACPI/IORT: Add a helper to retrieve RMR memory regions Shameer Kolothum
2021-05-13 13:45   ` Shameer Kolothum
2021-05-13 13:45   ` Shameer Kolothum
2021-06-03 11:20   ` Lorenzo Pieralisi
2021-06-03 11:20     ` Lorenzo Pieralisi
2021-06-03 11:20     ` Lorenzo Pieralisi
2021-05-13 13:45 ` [PATCH v4 4/8] iommu/arm-smmu-v3: Introduce strtab init helper Shameer Kolothum
2021-05-13 13:45   ` Shameer Kolothum
2021-05-13 13:45   ` Shameer Kolothum
2021-05-13 13:45 ` [PATCH v4 5/8] iommu/arm-smmu-v3: Add bypass flag to arm_smmu_write_strtab_ent() Shameer Kolothum
2021-05-13 13:45   ` Shameer Kolothum
2021-05-13 13:45   ` Shameer Kolothum
2021-05-13 13:45 ` [PATCH v4 6/8] iommu/arm-smmu-v3: Get associated RMR info and install bypass STE Shameer Kolothum
2021-05-13 13:45   ` Shameer Kolothum
2021-05-13 13:45   ` Shameer Kolothum
2021-05-13 13:45 ` [PATCH v4 7/8] iommu/arm-smmu: Get associated RMR info and install bypass SMR Shameer Kolothum
2021-05-13 13:45   ` Shameer Kolothum
2021-05-13 13:45   ` Shameer Kolothum
2021-05-13 13:45 ` [PATCH v4 8/8] iommu/dma: Reserve any RMR regions associated with a dev Shameer Kolothum
2021-05-13 13:45   ` Shameer Kolothum
2021-05-13 13:45   ` Shameer Kolothum
2021-05-21 12:55 ` [PATCH v4 0/8] ACPI/IORT: Support for IORT RMR node Steven Price
2021-05-21 12:55   ` Steven Price
2021-05-21 12:55   ` Steven Price
2021-05-21 13:12   ` Shameerali Kolothum Thodi
2021-05-21 13:12     ` Shameerali Kolothum Thodi
2021-05-21 13:12     ` Shameerali Kolothum Thodi

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