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iommu/omap: Move debugfs functions to omap-iommu-debug.c

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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 <s-anna@ti.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Suman Anna
2015-07-20 17:33:25 -05:00
committed by Joerg Roedel
parent 0cdbf72716
commit 69c2c19632
3 changed files with 137 additions and 150 deletions
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111
drivers/iommu/omap-iommu-debug.c
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@@ -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)
{