From 69c2c196328e73d3091dd0be89ab4b0c2af4b210 Mon Sep 17 00:00:00 2001 From: Suman Anna Date: Mon, 20 Jul 2015 17:33:25 -0500 Subject: iommu/omap: Move debugfs functions to omap-iommu-debug.c The main OMAP IOMMU driver file has some helper functions used by the OMAP IOMMU debugfs functionality, and there is already a dedicated source file omap-iommu-debug.c dealing with these debugfs routines. Move all these functions to the omap-iommu-debug.c file, so that all the debugfs related routines are in one place. The move required exposing some new functions and moving some definitions to the internal omap-iommu.h header file. Signed-off-by: Suman Anna Signed-off-by: Joerg Roedel --- drivers/iommu/omap-iommu-debug.c | 111 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 111 insertions(+) (limited to 'drivers/iommu/omap-iommu-debug.c') diff --git a/drivers/iommu/omap-iommu-debug.c b/drivers/iommu/omap-iommu-debug.c index f3d20a2039d2..b4b96db37e6a 100644 --- a/drivers/iommu/omap-iommu-debug.c +++ b/drivers/iommu/omap-iommu-debug.c @@ -14,6 +14,7 @@ #include #include #include +#include #include #include @@ -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) { -- cgit