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Re: [Xen-devel] [v3 5/6] drivers/passthrough/arm: Refactor code for arm smmu drivers
Hi Sameer,
On 06/08/2018 05:17 AM, Sameer Goel wrote:
Pull common defines for SMMU drives in a local header.
Can add more detail in commit message?
Signed-off-by: Sameer Goel <sameer.goel@xxxxxxxxxx>
---
xen/drivers/passthrough/arm/smmu-v3.c | 96 +-------------------
xen/drivers/passthrough/arm/smmu.c | 104 +--------------------
xen/drivers/passthrough/arm/smmu.h | 125 ++++++++++++++++++++++++++
3 files changed, 128 insertions(+), 197 deletions(-)
create mode 100644 xen/drivers/passthrough/arm/smmu.h
diff --git a/xen/drivers/passthrough/arm/smmu-v3.c
b/xen/drivers/passthrough/arm/smmu-v3.c
index 75c3411ad9..fdf85c1508 100644
--- a/xen/drivers/passthrough/arm/smmu-v3.c
+++ b/xen/drivers/passthrough/arm/smmu-v3.c
@@ -49,28 +49,7 @@
#include <asm/io.h>
#include <asm/platform.h>
-/* Alias to Xen device tree helpers */
-#define device_node dt_device_node
-#define of_phandle_args dt_phandle_args
-#define of_device_id dt_device_match
-#define of_match_node dt_match_node
-#define of_property_read_u32(np, pname, out) (!dt_property_read_u32(np, pname,
out))
-#define of_property_read_bool dt_property_read_bool
-#define of_parse_phandle_with_args dt_parse_phandle_with_args
-
-/* Xen: Helpers to get device MMIO and IRQs */
Added and removed in subsequent patches? code specific to xen.
you can remove from patch#4 itself.
-struct resource {
- u64 addr;
- u64 size;
- unsigned int type;
-};
-
-#define resource_size(res) ((res)->size)
-
-#define platform_device device
-
-#define IORESOURCE_MEM 0
-#define IORESOURCE_IRQ 1
+#include "smmu.h"
static struct resource *platform_get_resource(struct platform_device *pdev,
unsigned int type,
@@ -200,79 +179,6 @@ static void dmam_free_coherent(struct device *dev, size_t
size, void *vaddr,
xfree(vaddr);
}
-/* Xen: Stub out DMA domain related functions */
-#define iommu_get_dma_cookie(dom) 0
-#define iommu_put_dma_cookie(dom)
-
-/* Xen: Stub out module param related function */
-#define module_param_named(a, b, c, d)
-#define MODULE_PARM_DESC(a, b)
-
-#define dma_set_mask_and_coherent(d, b) 0
-
-#define of_dma_is_coherent(n) 0
-
-#define MODULE_DEVICE_TABLE(type, name)
-
-static void __iomem *devm_ioremap_resource(struct device *dev,
- struct resource *res)
-{
- void __iomem *ptr;
-
- if (!res || res->type != IORESOURCE_MEM) {
- dev_err(dev, "Invalid resource\n");
- return ERR_PTR(-EINVAL);
- }
-
- ptr = ioremap_nocache(res->addr, res->size);
- if (!ptr) {
- dev_err(dev,
- "ioremap failed (addr 0x%"PRIx64" size 0x%"PRIx64")\n",
- res->addr, res->size);
- return ERR_PTR(-ENOMEM);
- }
-
- return ptr;
-}
-
-/* Xen: Compatibility define for iommu_domain_geometry.*/
-struct iommu_domain_geometry {
- dma_addr_t aperture_start; /* First address that can be mapped */
- dma_addr_t aperture_end; /* Last address that can be mapped */
- bool force_aperture; /* DMA only allowed in mappable range? */
-};
-
-
-/* Xen: Type definitions for iommu_domain */
-#define IOMMU_DOMAIN_UNMANAGED 0
-#define IOMMU_DOMAIN_DMA 1
-#define IOMMU_DOMAIN_IDENTITY 2
-
-/* Xen: Dummy iommu_domain */
-struct iommu_domain {
- /* Runtime SMMU configuration for this iommu_domain */
- struct arm_smmu_domain *priv;
- unsigned int type;
-
- /* Dummy compatibility defines */
- unsigned long pgsize_bitmap;
- struct iommu_domain_geometry geometry;
-
- atomic_t ref;
- /*
- * Used to link iommu_domain contexts for a same domain.
- * There is at least one per-SMMU to used by the domain.
- */
- struct list_head list;
-};
-
This xen dummy structure was introduced in patch 4 and now removing in
patch5,
Can you remove it from patch 4 itself?
-/* Xen: Describes information required for a Xen domain */
-struct arm_smmu_xen_domain {
- spinlock_t lock;
- /* List of iommu domains associated to this domain */
- struct list_head contexts;
-};
-
Same as above
/*
* Xen: Information about each device stored in dev->archdata.iommu
*
diff --git a/xen/drivers/passthrough/arm/smmu.c
b/xen/drivers/passthrough/arm/smmu.c
index ad956d5b8d..f7a6b107de 100644
--- a/xen/drivers/passthrough/arm/smmu.c
+++ b/xen/drivers/passthrough/arm/smmu.c
@@ -41,6 +41,7 @@
#include <xen/irq.h>
#include <xen/lib.h>
#include <xen/list.h>
+#include <xen/linux-compat.h>
#include <xen/mm.h>
#include <xen/vmap.h>
#include <xen/rbtree.h>
@@ -51,36 +52,13 @@
#include <asm/io.h>
#include <asm/platform.h>
+#include "smmu.h" /* Not a self contained header. So last in the list */
/* Xen: The below defines are redefined within the file. Undef it */
#undef SCTLR_AFE
#undef SCTLR_TRE
#undef SCTLR_M
#undef TTBCR_EAE
-/* Alias to Xen device tree helpers */
-#define device_node dt_device_node
-#define of_phandle_args dt_phandle_args
-#define of_device_id dt_device_match
-#define of_match_node dt_match_node
-#define of_property_read_u32(np, pname, out) (!dt_property_read_u32(np, pname,
out))
-#define of_property_read_bool dt_property_read_bool
-#define of_parse_phandle_with_args dt_parse_phandle_with_args
-
-/* Xen: Helpers to get device MMIO and IRQs */
-struct resource
-{
- u64 addr;
- u64 size;
- unsigned int type;
-};
-
-#define resource_size(res) (res)->size;
-
-#define platform_device device
-
-#define IORESOURCE_MEM 0
-#define IORESOURCE_IRQ 1
-
static struct resource *platform_get_resource(struct platform_device *pdev,
unsigned int type,
unsigned int num)
@@ -118,58 +96,6 @@ static struct resource *platform_get_resource(struct
platform_device *pdev,
/* Xen: Helpers for IRQ functions */
#define request_irq(irq, func, flags, name, dev) request_irq(irq, flags,
func, name, dev)
-#define free_irq release_irq
-
-enum irqreturn {
- IRQ_NONE = (0 << 0),
- IRQ_HANDLED = (1 << 0),
-};
-
-typedef enum irqreturn irqreturn_t;
-
-/* Device logger functions
- * TODO: Handle PCI
- */
-#define dev_print(dev, lvl, fmt, ...)
\
- printk(lvl "smmu: %s: " fmt, dt_node_full_name(dev_to_dt(dev)), ##
__VA_ARGS__)
-
-#define dev_dbg(dev, fmt, ...) dev_print(dev, XENLOG_DEBUG, fmt, ##
__VA_ARGS__)
-#define dev_notice(dev, fmt, ...) dev_print(dev, XENLOG_INFO, fmt, ##
__VA_ARGS__)
-#define dev_warn(dev, fmt, ...) dev_print(dev, XENLOG_WARNING, fmt, ##
__VA_ARGS__)
-#define dev_err(dev, fmt, ...) dev_print(dev, XENLOG_ERR, fmt, ## __VA_ARGS__)
-
-#define dev_err_ratelimited(dev, fmt, ...)
\
- dev_print(dev, XENLOG_ERR, fmt, ## __VA_ARGS__)
-
-#define dev_name(dev) dt_node_full_name(dev_to_dt(dev))
-
-/* Alias to Xen allocation helpers */
-#define kfree xfree
-#define kmalloc(size, flags) _xmalloc(size, sizeof(void *))
-#define kzalloc(size, flags) _xzalloc(size, sizeof(void *))
-#define devm_kzalloc(dev, size, flags) _xzalloc(size, sizeof(void *))
-#define kmalloc_array(size, n, flags) _xmalloc_array(size, sizeof(void *), n)
-
-static void __iomem *devm_ioremap_resource(struct device *dev,
- struct resource *res)
-{
- void __iomem *ptr;
-
- if (!res || res->type != IORESOURCE_MEM) {
- dev_err(dev, "Invalid resource\n");
- return ERR_PTR(-EINVAL);
- }
-
- ptr = ioremap_nocache(res->addr, res->size);
- if (!ptr) {
- dev_err(dev,
- "ioremap failed (addr 0x%"PRIx64" size 0x%"PRIx64")\n",
- res->addr, res->size);
- return ERR_PTR(-ENOMEM);
- }
-
- return ptr;
-}
/* Xen doesn't handle IOMMU fault */
#define report_iommu_fault(...) 1
@@ -196,32 +122,6 @@ static inline int pci_for_each_dma_alias(struct pci_dev
*pdev,
#define PHYS_MASK_SHIFT PADDR_BITS
typedef paddr_t phys_addr_t;
-#define VA_BITS 0 /* Only used for configuring stage-1 input size */
-
-#define MODULE_DEVICE_TABLE(type, name)
-#define module_param_named(name, value, type, perm)
-#define MODULE_PARM_DESC(_parm, desc)
-
-/* Xen: Dummy iommu_domain */
-struct iommu_domain
-{
- /* Runtime SMMU configuration for this iommu_domain */
- struct arm_smmu_domain *priv;
-
- atomic_t ref;
- /* Used to link iommu_domain contexts for a same domain.
- * There is at least one per-SMMU to used by the domain.
- * */
- struct list_head list;
-};
-
-/* Xen: Describes informations required for a Xen domain */
-struct arm_smmu_xen_domain {
- spinlock_t lock;
- /* List of context (i.e iommu_domain) associated to this domain */
- struct list_head contexts;
-};
-
/*
* Xen: Information about each device stored in dev->archdata.iommu
*
diff --git a/xen/drivers/passthrough/arm/smmu.h
b/xen/drivers/passthrough/arm/smmu.h
new file mode 100644
index 0000000000..8e38d78c1a
--- /dev/null
+++ b/xen/drivers/passthrough/arm/smmu.h
@@ -0,0 +1,125 @@
+/******************************************************************************
+ * ./smmu.h
+ *
+ * Common compatibility defines and data_structures for porting arm smmu
+ * drivers from Linux.
+ *
+ * Copyright (c) 2017 Linaro Limited
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __SMMU_H__
+#define __SMMU_H__
+
+
+/* Alias to Xen device tree helpers */
+#define device_node dt_device_node
+#define of_phandle_args dt_phandle_args
+#define of_device_id dt_device_match
+#define of_match_node dt_match_node
+#define of_property_read_u32(np, pname, out) (!dt_property_read_u32(np, pname,
out))
+#define of_property_read_bool dt_property_read_bool
+#define of_parse_phandle_with_args dt_parse_phandle_with_args
+
+/* Helpers to get device MMIO and IRQs */
+struct resource {
+ u64 addr;
+ u64 size;
+ unsigned int type;
+};
+
+#define resource_size(res) ((res)->size)
+
+#define platform_device device
+
+#define IORESOURCE_MEM 0
+#define IORESOURCE_IRQ 1
+
+/* Stub out DMA domain related functions */
+#define iommu_get_dma_cookie(dom) 0
+#define iommu_put_dma_cookie(dom)
+
+#define VA_BITS 0 /* Only used for configuring stage-1 input
size */
+
+#define MODULE_DEVICE_TABLE(type, name)
+#define module_param_named(name, value, type, perm)
+#define MODULE_PARM_DESC(_parm, desc)
+
+#define dma_set_mask_and_coherent(d, b) 0
+#define of_dma_is_coherent(n) 0
+
+static void __iomem *devm_ioremap_resource(struct device *dev,
+ struct resource *res)
+{
+ void __iomem *ptr;
+
+ if ( !res || res->type != IORESOURCE_MEM )
+ {
+ dev_err(dev, "Invalid resource\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ ptr = ioremap_nocache(res->addr, res->size);
+ if ( !ptr )
+ {
+ dev_err(dev, "ioremap failed (addr 0x%"PRIx64" size 0x%"PRIx64")\n",
+ res->addr, res->size);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ return ptr;
+}
+
+/*
+ * Domain type definitions. Not really needed for Xen, defining to port
+ * Linux code as-is
+ */
+#define IOMMU_DOMAIN_UNMANAGED 0
+#define IOMMU_DOMAIN_DMA 1
+#define IOMMU_DOMAIN_IDENTITY 2
+
+/* Xen: Compatibility define for iommu_domain_geometry.*/
+struct iommu_domain_geometry {
+ dma_addr_t aperture_start; /* First address that can be mapped */
+ dma_addr_t aperture_end; /* Last address that can be mapped */
+ bool force_aperture; /* DMA only allowed in mappable range? */
+};
+
+/* Xen: Dummy iommu_domain */
+struct iommu_domain {
+ /* Runtime SMMU configuration for this iommu_domain */
+ struct arm_smmu_domain *priv;
+ unsigned int type;
+
+ /* Dummy compatibility defines */
+ unsigned long pgsize_bitmap;
+ struct iommu_domain_geometry geometry;
+
+ atomic_t ref;
+ /* Used to link iommu_domain contexts for a same domain.
+ * There is at least one per-SMMU to used by the domain.
+ */
+ struct list_head list;
+};
+
+/* Xen: Describes information required for a Xen domain */
+struct arm_smmu_xen_domain {
+ spinlock_t lock;
+ /* List of iommu domains associated to this domain */
+ struct list_head contexts;
+};
+
+#endif /* __SMMU_H__ */
+
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