diff options
| -rw-r--r-- | drivers/iommu/omap-iommu-debug.c | 111 | ||||
| -rw-r--r-- | drivers/iommu/omap-iommu.c | 148 | ||||
| -rw-r--r-- | drivers/iommu/omap-iommu.h | 28 |
3 files changed, 137 insertions, 150 deletions
diff --git a/drivers/iommu/omap-iommu-debug.c b/drivers/iommu/omap-iommu-debug.c index f3d20a2..b4b96db 100644 --- a/drivers/iommu/omap-iommu-debug.c +++ b/drivers/iommu/omap-iommu-debug.c @@ -14,6 +14,7 @@ #include <linux/io.h> #include <linux/slab.h> #include <linux/uaccess.h> +#include <linux/pm_runtime.h> #include <linux/debugfs.h> #include <linux/platform_data/iommu-omap.h> @@ -29,6 +30,59 @@ static inline bool is_omap_iommu_detached(struct omap_iommu *obj) return !obj->domain; } +#define pr_reg(name) \ + do { \ + ssize_t bytes; \ + const char *str = "%20s: %08x\n"; \ + const int maxcol = 32; \ + bytes = snprintf(p, maxcol, str, __stringify(name), \ + iommu_read_reg(obj, MMU_##name)); \ + p += bytes; \ + len -= bytes; \ + if (len < maxcol) \ + goto out; \ + } while (0) + +static ssize_t +omap2_iommu_dump_ctx(struct omap_iommu *obj, char *buf, ssize_t len) +{ + char *p = buf; + + pr_reg(REVISION); + pr_reg(IRQSTATUS); + pr_reg(IRQENABLE); + pr_reg(WALKING_ST); + pr_reg(CNTL); + pr_reg(FAULT_AD); + pr_reg(TTB); + pr_reg(LOCK); + pr_reg(LD_TLB); + pr_reg(CAM); + pr_reg(RAM); + pr_reg(GFLUSH); + pr_reg(FLUSH_ENTRY); + pr_reg(READ_CAM); + pr_reg(READ_RAM); + pr_reg(EMU_FAULT_AD); +out: + return p - buf; +} + +static ssize_t omap_iommu_dump_ctx(struct omap_iommu *obj, char *buf, + ssize_t bytes) +{ + if (!obj || !buf) + return -EINVAL; + + pm_runtime_get_sync(obj->dev); + + bytes = omap2_iommu_dump_ctx(obj, buf, bytes); + + pm_runtime_put_sync(obj->dev); + + return bytes; +} + static ssize_t debug_read_regs(struct file *file, char __user *userbuf, size_t count, loff_t *ppos) { @@ -55,6 +109,63 @@ static ssize_t debug_read_regs(struct file *file, char __user *userbuf, return bytes; } +static int +__dump_tlb_entries(struct omap_iommu *obj, struct cr_regs *crs, int num) +{ + int i; + struct iotlb_lock saved; + struct cr_regs tmp; + struct cr_regs *p = crs; + + pm_runtime_get_sync(obj->dev); + iotlb_lock_get(obj, &saved); + + for_each_iotlb_cr(obj, num, i, tmp) { + if (!iotlb_cr_valid(&tmp)) + continue; + *p++ = tmp; + } + + iotlb_lock_set(obj, &saved); + pm_runtime_put_sync(obj->dev); + + return p - crs; +} + +static ssize_t iotlb_dump_cr(struct omap_iommu *obj, struct cr_regs *cr, + char *buf) +{ + char *p = buf; + + /* FIXME: Need more detail analysis of cam/ram */ + p += sprintf(p, "%08x %08x %01x\n", cr->cam, cr->ram, + (cr->cam & MMU_CAM_P) ? 1 : 0); + + return p - buf; +} + +static size_t omap_dump_tlb_entries(struct omap_iommu *obj, char *buf, + ssize_t bytes) +{ + int i, num; + struct cr_regs *cr; + char *p = buf; + + num = bytes / sizeof(*cr); + num = min(obj->nr_tlb_entries, num); + + cr = kcalloc(num, sizeof(*cr), GFP_KERNEL); + if (!cr) + return 0; + + num = __dump_tlb_entries(obj, cr, num); + for (i = 0; i < num; i++) + p += iotlb_dump_cr(obj, cr + i, p); + kfree(cr); + + return p - buf; +} + static ssize_t debug_read_tlb(struct file *file, char __user *userbuf, size_t count, loff_t *ppos) { diff --git a/drivers/iommu/omap-iommu.c b/drivers/iommu/omap-iommu.c index eeecfc4..0fc00f3 100644 --- a/drivers/iommu/omap-iommu.c +++ b/drivers/iommu/omap-iommu.c @@ -37,11 +37,6 @@ #define to_iommu(dev) \ ((struct omap_iommu *)platform_get_drvdata(to_platform_device(dev))) -#define for_each_iotlb_cr(obj, n, __i, cr) \ - for (__i = 0; \ - (__i < (n)) && (cr = __iotlb_read_cr((obj), __i), true); \ - __i++) - /* bitmap of the page sizes currently supported */ #define OMAP_IOMMU_PGSIZES (SZ_4K | SZ_64K | SZ_1M | SZ_16M) @@ -71,11 +66,6 @@ struct omap_iommu_domain { #define MMU_LOCK_VICT(x) \ ((x & MMU_LOCK_VICT_MASK) >> MMU_LOCK_VICT_SHIFT) -struct iotlb_lock { - short base; - short vict; -}; - static struct platform_driver omap_iommu_driver; static struct kmem_cache *iopte_cachep; @@ -212,14 +202,6 @@ static void iommu_disable(struct omap_iommu *obj) /* * TLB operations */ -static inline int iotlb_cr_valid(struct cr_regs *cr) -{ - if (!cr) - return -EINVAL; - - return cr->cam & MMU_CAM_V; -} - static u32 iotlb_cr_to_virt(struct cr_regs *cr) { u32 page_size = cr->cam & MMU_CAM_PGSZ_MASK; @@ -259,7 +241,7 @@ static u32 iommu_report_fault(struct omap_iommu *obj, u32 *da) return status; } -static void iotlb_lock_get(struct omap_iommu *obj, struct iotlb_lock *l) +void iotlb_lock_get(struct omap_iommu *obj, struct iotlb_lock *l) { u32 val; @@ -267,10 +249,9 @@ static void iotlb_lock_get(struct omap_iommu *obj, struct iotlb_lock *l) l->base = MMU_LOCK_BASE(val); l->vict = MMU_LOCK_VICT(val); - } -static void iotlb_lock_set(struct omap_iommu *obj, struct iotlb_lock *l) +void iotlb_lock_set(struct omap_iommu *obj, struct iotlb_lock *l) { u32 val; @@ -296,7 +277,7 @@ static void iotlb_load_cr(struct omap_iommu *obj, struct cr_regs *cr) } /* only used in iotlb iteration for-loop */ -static struct cr_regs __iotlb_read_cr(struct omap_iommu *obj, int n) +struct cr_regs __iotlb_read_cr(struct omap_iommu *obj, int n) { struct cr_regs cr; struct iotlb_lock l; @@ -467,129 +448,6 @@ static void flush_iotlb_all(struct omap_iommu *obj) pm_runtime_put_sync(obj->dev); } -#ifdef CONFIG_OMAP_IOMMU_DEBUG - -#define pr_reg(name) \ - do { \ - ssize_t bytes; \ - const char *str = "%20s: %08x\n"; \ - const int maxcol = 32; \ - bytes = snprintf(p, maxcol, str, __stringify(name), \ - iommu_read_reg(obj, MMU_##name)); \ - p += bytes; \ - len -= bytes; \ - if (len < maxcol) \ - goto out; \ - } while (0) - -static ssize_t -omap2_iommu_dump_ctx(struct omap_iommu *obj, char *buf, ssize_t len) -{ - char *p = buf; - - pr_reg(REVISION); - pr_reg(IRQSTATUS); - pr_reg(IRQENABLE); - pr_reg(WALKING_ST); - pr_reg(CNTL); - pr_reg(FAULT_AD); - pr_reg(TTB); - pr_reg(LOCK); - pr_reg(LD_TLB); - pr_reg(CAM); - pr_reg(RAM); - pr_reg(GFLUSH); - pr_reg(FLUSH_ENTRY); - pr_reg(READ_CAM); - pr_reg(READ_RAM); - pr_reg(EMU_FAULT_AD); -out: - return p - buf; -} - -ssize_t omap_iommu_dump_ctx(struct omap_iommu *obj, char *buf, ssize_t bytes) -{ - if (!obj || !buf) - return -EINVAL; - - pm_runtime_get_sync(obj->dev); - - bytes = omap2_iommu_dump_ctx(obj, buf, bytes); - - pm_runtime_put_sync(obj->dev); - - return bytes; -} - -static int -__dump_tlb_entries(struct omap_iommu *obj, struct cr_regs *crs, int num) -{ - int i; - struct iotlb_lock saved; - struct cr_regs tmp; - struct cr_regs *p = crs; - - pm_runtime_get_sync(obj->dev); - iotlb_lock_get(obj, &saved); - - for_each_iotlb_cr(obj, num, i, tmp) { - if (!iotlb_cr_valid(&tmp)) - continue; - *p++ = tmp; - } - - iotlb_lock_set(obj, &saved); - pm_runtime_put_sync(obj->dev); - - return p - crs; -} - -/** - * iotlb_dump_cr - Dump an iommu tlb entry into buf - * @obj: target iommu - * @cr: contents of cam and ram register - * @buf: output buffer - **/ -static ssize_t iotlb_dump_cr(struct omap_iommu *obj, struct cr_regs *cr, - char *buf) -{ - char *p = buf; - - /* FIXME: Need more detail analysis of cam/ram */ - p += sprintf(p, "%08x %08x %01x\n", cr->cam, cr->ram, - (cr->cam & MMU_CAM_P) ? 1 : 0); - - return p - buf; -} - -/** - * omap_dump_tlb_entries - dump cr arrays to given buffer - * @obj: target iommu - * @buf: output buffer - **/ -size_t omap_dump_tlb_entries(struct omap_iommu *obj, char *buf, ssize_t bytes) -{ - int i, num; - struct cr_regs *cr; - char *p = buf; - - num = bytes / sizeof(*cr); - num = min(obj->nr_tlb_entries, num); - - cr = kcalloc(num, sizeof(*cr), GFP_KERNEL); - if (!cr) - return 0; - - num = __dump_tlb_entries(obj, cr, num); - for (i = 0; i < num; i++) - p += iotlb_dump_cr(obj, cr + i, p); - kfree(cr); - - return p - buf; -} - -#endif /* CONFIG_OMAP_IOMMU_DEBUG */ - /* * H/W pagetable operations */ diff --git a/drivers/iommu/omap-iommu.h b/drivers/iommu/omap-iommu.h index d736630..b6cc90b 100644 --- a/drivers/iommu/omap-iommu.h +++ b/drivers/iommu/omap-iommu.h @@ -13,6 +13,11 @@ #ifndef _OMAP_IOMMU_H #define _OMAP_IOMMU_H +#define for_each_iotlb_cr(obj, n, __i, cr) \ + for (__i = 0; \ + (__i < (n)) && (cr = __iotlb_read_cr((obj), __i), true); \ + __i++) + struct iotlb_entry { u32 da; u32 pa; @@ -65,6 +70,11 @@ struct cr_regs { }; }; +struct iotlb_lock { + short base; + short vict; +}; + /** * dev_to_omap_iommu() - retrieves an omap iommu object from a user device * @dev: iommu client device @@ -190,12 +200,12 @@ static inline struct omap_iommu *dev_to_omap_iommu(struct device *dev) /* * global functions */ -#ifdef CONFIG_OMAP_IOMMU_DEBUG -extern ssize_t -omap_iommu_dump_ctx(struct omap_iommu *obj, char *buf, ssize_t len); -extern size_t -omap_dump_tlb_entries(struct omap_iommu *obj, char *buf, ssize_t len); +struct cr_regs __iotlb_read_cr(struct omap_iommu *obj, int n); +void iotlb_lock_get(struct omap_iommu *obj, struct iotlb_lock *l); +void iotlb_lock_set(struct omap_iommu *obj, struct iotlb_lock *l); + +#ifdef CONFIG_OMAP_IOMMU_DEBUG void omap_iommu_debugfs_init(void); void omap_iommu_debugfs_exit(void); @@ -222,4 +232,12 @@ static inline void iommu_write_reg(struct omap_iommu *obj, u32 val, size_t offs) __raw_writel(val, obj->regbase + offs); } +static inline int iotlb_cr_valid(struct cr_regs *cr) +{ + if (!cr) + return -EINVAL; + + return cr->cam & MMU_CAM_V; +} + #endif /* _OMAP_IOMMU_H */ |
