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authorSuman Anna <s-anna@ti.com>2014-10-23 02:22:27 +0400
committerJoerg Roedel <jroedel@suse.de>2014-10-23 16:32:25 +0400
commitbd4396f09a4a9e77423e92ec9448217ab46f6edf (patch)
treeb437a750480b8a463b7e136a21d3a0dac7d555b2 /drivers/iommu/omap-iommu.h
parent124262a2eecc4c3e6e96e083e50ce4909b2d69d9 (diff)
downloadlinux-bd4396f09a4a9e77423e92ec9448217ab46f6edf.tar.xz
iommu/omap: Consolidate OMAP IOMMU modules
The OMAP IOMMU driver was originally designed as modules, and split into a core module and a thin arch-specific module through the OMAP arch-specific struct iommu_functions, to scale for both OMAP1 and OMAP2+ IOMMU variants. The driver can only be built for OMAP2+ platforms currently, and also can only be built-in after the adaptation to generic IOMMU API. The OMAP1 variant was never added and will most probably be never added (the code for the only potential user, its parent, DSP processor has already been cleaned up). So, consolidate the OMAP2 specific omap-iommu2 module into the core OMAP IOMMU driver - this eliminates the arch-specific ops structure and simplifies the driver into a single module that only implements the generic IOMMU API's iommu_ops. The following are the main changes: - omap-iommu2 module is completely eliminated, with the common definitions moved to the internal omap-iommu.h, and the ops implementations moved into omap-iommu.c - OMAP arch-specific struct iommu_functions is also eliminated, with the ops implementations directly absorbed into the calling functions - iotlb_alloc_cr() is no longer inlined and defined only when PREFETCH_IOTLB is defined - iotlb_dump_cr() is similarly defined only when CONFIG_OMAP_IOMMU_DEBUG is defined - Elimination of the OMAP IOMMU exported functions to register the arch ops, omap_install_iommu_arch() & omap_uninstall_iommu_arch() - Any stale comments about OMAP1 are also cleaned up Signed-off-by: Suman Anna <s-anna@ti.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/omap-iommu.h')
-rw-r--r--drivers/iommu/omap-iommu.h61
1 files changed, 29 insertions, 32 deletions
diff --git a/drivers/iommu/omap-iommu.h b/drivers/iommu/omap-iommu.h
index 45fe67d641e2..0516e0ed77d7 100644
--- a/drivers/iommu/omap-iommu.h
+++ b/drivers/iommu/omap-iommu.h
@@ -13,10 +13,6 @@
#ifndef _OMAP_IOMMU_H
#define _OMAP_IOMMU_H
-#if defined(CONFIG_ARCH_OMAP1)
-#error "iommu for this processor not implemented yet"
-#endif
-
struct iotlb_entry {
u32 da;
u32 pa;
@@ -68,31 +64,6 @@ struct cr_regs {
};
};
-/* architecture specific functions */
-struct iommu_functions {
- int (*enable)(struct omap_iommu *obj);
- void (*disable)(struct omap_iommu *obj);
- void (*set_twl)(struct omap_iommu *obj, bool on);
- u32 (*fault_isr)(struct omap_iommu *obj, u32 *ra);
-
- void (*tlb_read_cr)(struct omap_iommu *obj, struct cr_regs *cr);
- void (*tlb_load_cr)(struct omap_iommu *obj, struct cr_regs *cr);
-
- struct cr_regs *(*alloc_cr)(struct omap_iommu *obj,
- struct iotlb_entry *e);
- int (*cr_valid)(struct cr_regs *cr);
- u32 (*cr_to_virt)(struct cr_regs *cr);
- void (*cr_to_e)(struct cr_regs *cr, struct iotlb_entry *e);
- ssize_t (*dump_cr)(struct omap_iommu *obj, struct cr_regs *cr,
- char *buf);
-
- u32 (*get_pte_attr)(struct iotlb_entry *e);
-
- void (*save_ctx)(struct omap_iommu *obj);
- void (*restore_ctx)(struct omap_iommu *obj);
- ssize_t (*dump_ctx)(struct omap_iommu *obj, char *buf, ssize_t len);
-};
-
/**
* dev_to_omap_iommu() - retrieves an omap iommu object from a user device
* @dev: iommu client device
@@ -130,6 +101,28 @@ static inline struct omap_iommu *dev_to_omap_iommu(struct device *dev)
/*
* MMU Register bit definitions
*/
+/* IRQSTATUS & IRQENABLE */
+#define MMU_IRQ_MULTIHITFAULT (1 << 4)
+#define MMU_IRQ_TABLEWALKFAULT (1 << 3)
+#define MMU_IRQ_EMUMISS (1 << 2)
+#define MMU_IRQ_TRANSLATIONFAULT (1 << 1)
+#define MMU_IRQ_TLBMISS (1 << 0)
+
+#define __MMU_IRQ_FAULT \
+ (MMU_IRQ_MULTIHITFAULT | MMU_IRQ_EMUMISS | MMU_IRQ_TRANSLATIONFAULT)
+#define MMU_IRQ_MASK \
+ (__MMU_IRQ_FAULT | MMU_IRQ_TABLEWALKFAULT | MMU_IRQ_TLBMISS)
+#define MMU_IRQ_TWL_MASK (__MMU_IRQ_FAULT | MMU_IRQ_TABLEWALKFAULT)
+#define MMU_IRQ_TLB_MISS_MASK (__MMU_IRQ_FAULT | MMU_IRQ_TLBMISS)
+
+/* MMU_CNTL */
+#define MMU_CNTL_SHIFT 1
+#define MMU_CNTL_MASK (7 << MMU_CNTL_SHIFT)
+#define MMU_CNTL_EML_TLB (1 << 3)
+#define MMU_CNTL_TWL_EN (1 << 2)
+#define MMU_CNTL_MMU_EN (1 << 1)
+
+/* CAM */
#define MMU_CAM_VATAG_SHIFT 12
#define MMU_CAM_VATAG_MASK \
((~0UL >> MMU_CAM_VATAG_SHIFT) << MMU_CAM_VATAG_SHIFT)
@@ -141,6 +134,7 @@ static inline struct omap_iommu *dev_to_omap_iommu(struct device *dev)
#define MMU_CAM_PGSZ_4K (2 << 0)
#define MMU_CAM_PGSZ_16M (3 << 0)
+/* RAM */
#define MMU_RAM_PADDR_SHIFT 12
#define MMU_RAM_PADDR_MASK \
((~0UL >> MMU_RAM_PADDR_SHIFT) << MMU_RAM_PADDR_SHIFT)
@@ -162,6 +156,12 @@ static inline struct omap_iommu *dev_to_omap_iommu(struct device *dev)
#define MMU_GP_REG_BUS_ERR_BACK_EN 0x1
+#define get_cam_va_mask(pgsz) \
+ (((pgsz) == MMU_CAM_PGSZ_16M) ? 0xff000000 : \
+ ((pgsz) == MMU_CAM_PGSZ_1M) ? 0xfff00000 : \
+ ((pgsz) == MMU_CAM_PGSZ_64K) ? 0xffff0000 : \
+ ((pgsz) == MMU_CAM_PGSZ_4K) ? 0xfffff000 : 0)
+
/*
* utilities for super page(16MB, 1MB, 64KB and 4KB)
*/
@@ -197,9 +197,6 @@ omap_iopgtable_store_entry(struct omap_iommu *obj, struct iotlb_entry *e);
extern int omap_foreach_iommu_device(void *data,
int (*fn)(struct device *, void *));
-extern int omap_install_iommu_arch(const struct iommu_functions *ops);
-extern void omap_uninstall_iommu_arch(const struct iommu_functions *ops);
-
extern ssize_t
omap_iommu_dump_ctx(struct omap_iommu *obj, char *buf, ssize_t len);
extern size_t