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-rw-r--r--drivers/gpu/drm/i915/i915_drv.h5
-rw-r--r--drivers/gpu/drm/i915/i915_gem.c71
-rw-r--r--drivers/gpu/drm/i915/i915_gem_tiling.c4
-rw-r--r--drivers/gpu/drm/i915/intel_display.c15
-rw-r--r--drivers/mtd/ubi/build.c28
-rw-r--r--drivers/mtd/ubi/debug.c269
-rw-r--r--drivers/mtd/ubi/debug.h113
-rw-r--r--drivers/mtd/ubi/io.c20
-rw-r--r--drivers/mtd/ubi/scan.c2
-rw-r--r--drivers/mtd/ubi/ubi.h8
-rw-r--r--drivers/mtd/ubi/vmt.c2
-rw-r--r--drivers/mtd/ubi/vtbl.c18
-rw-r--r--drivers/mtd/ubi/wl.c42
13 files changed, 454 insertions, 143 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index f245c588ae9..ce7914c4c04 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -262,6 +262,7 @@ enum intel_pch {
};
#define QUIRK_PIPEA_FORCE (1<<0)
+#define QUIRK_LVDS_SSC_DISABLE (1<<1)
struct intel_fbdev;
@@ -1194,7 +1195,9 @@ void i915_gem_free_all_phys_object(struct drm_device *dev);
void i915_gem_release(struct drm_device *dev, struct drm_file *file);
uint32_t
-i915_gem_get_unfenced_gtt_alignment(struct drm_i915_gem_object *obj);
+i915_gem_get_unfenced_gtt_alignment(struct drm_device *dev,
+ uint32_t size,
+ int tiling_mode);
/* i915_gem_gtt.c */
void i915_gem_restore_gtt_mappings(struct drm_device *dev);
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 5c0d1247f45..a087e1bf0c2 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -1374,25 +1374,24 @@ i915_gem_free_mmap_offset(struct drm_i915_gem_object *obj)
}
static uint32_t
-i915_gem_get_gtt_size(struct drm_i915_gem_object *obj)
+i915_gem_get_gtt_size(struct drm_device *dev, uint32_t size, int tiling_mode)
{
- struct drm_device *dev = obj->base.dev;
- uint32_t size;
+ uint32_t gtt_size;
if (INTEL_INFO(dev)->gen >= 4 ||
- obj->tiling_mode == I915_TILING_NONE)
- return obj->base.size;
+ tiling_mode == I915_TILING_NONE)
+ return size;
/* Previous chips need a power-of-two fence region when tiling */
if (INTEL_INFO(dev)->gen == 3)
- size = 1024*1024;
+ gtt_size = 1024*1024;
else
- size = 512*1024;
+ gtt_size = 512*1024;
- while (size < obj->base.size)
- size <<= 1;
+ while (gtt_size < size)
+ gtt_size <<= 1;
- return size;
+ return gtt_size;
}
/**
@@ -1403,59 +1402,52 @@ i915_gem_get_gtt_size(struct drm_i915_gem_object *obj)
* potential fence register mapping.
*/
static uint32_t
-i915_gem_get_gtt_alignment(struct drm_i915_gem_object *obj)
+i915_gem_get_gtt_alignment(struct drm_device *dev,
+ uint32_t size,
+ int tiling_mode)
{
- struct drm_device *dev = obj->base.dev;
-
/*
* Minimum alignment is 4k (GTT page size), but might be greater
* if a fence register is needed for the object.
*/
if (INTEL_INFO(dev)->gen >= 4 ||
- obj->tiling_mode == I915_TILING_NONE)
+ tiling_mode == I915_TILING_NONE)
return 4096;
/*
* Previous chips need to be aligned to the size of the smallest
* fence register that can contain the object.
*/
- return i915_gem_get_gtt_size(obj);
+ return i915_gem_get_gtt_size(dev, size, tiling_mode);
}
/**
* i915_gem_get_unfenced_gtt_alignment - return required GTT alignment for an
* unfenced object
- * @obj: object to check
+ * @dev: the device
+ * @size: size of the object
+ * @tiling_mode: tiling mode of the object
*
* Return the required GTT alignment for an object, only taking into account
* unfenced tiled surface requirements.
*/
uint32_t
-i915_gem_get_unfenced_gtt_alignment(struct drm_i915_gem_object *obj)
+i915_gem_get_unfenced_gtt_alignment(struct drm_device *dev,
+ uint32_t size,
+ int tiling_mode)
{
- struct drm_device *dev = obj->base.dev;
- int tile_height;
-
/*
* Minimum alignment is 4k (GTT page size) for sane hw.
*/
if (INTEL_INFO(dev)->gen >= 4 || IS_G33(dev) ||
- obj->tiling_mode == I915_TILING_NONE)
+ tiling_mode == I915_TILING_NONE)
return 4096;
- /*
- * Older chips need unfenced tiled buffers to be aligned to the left
- * edge of an even tile row (where tile rows are counted as if the bo is
- * placed in a fenced gtt region).
+ /* Previous hardware however needs to be aligned to a power-of-two
+ * tile height. The simplest method for determining this is to reuse
+ * the power-of-tile object size.
*/
- if (IS_GEN2(dev))
- tile_height = 16;
- else if (obj->tiling_mode == I915_TILING_Y && HAS_128_BYTE_Y_TILING(dev))
- tile_height = 32;
- else
- tile_height = 8;
-
- return tile_height * obj->stride * 2;
+ return i915_gem_get_gtt_size(dev, size, tiling_mode);
}
int
@@ -2744,9 +2736,16 @@ i915_gem_object_bind_to_gtt(struct drm_i915_gem_object *obj,
return -EINVAL;
}
- fence_size = i915_gem_get_gtt_size(obj);
- fence_alignment = i915_gem_get_gtt_alignment(obj);
- unfenced_alignment = i915_gem_get_unfenced_gtt_alignment(obj);
+ fence_size = i915_gem_get_gtt_size(dev,
+ obj->base.size,
+ obj->tiling_mode);
+ fence_alignment = i915_gem_get_gtt_alignment(dev,
+ obj->base.size,
+ obj->tiling_mode);
+ unfenced_alignment =
+ i915_gem_get_unfenced_gtt_alignment(dev,
+ obj->base.size,
+ obj->tiling_mode);
if (alignment == 0)
alignment = map_and_fenceable ? fence_alignment :
diff --git a/drivers/gpu/drm/i915/i915_gem_tiling.c b/drivers/gpu/drm/i915/i915_gem_tiling.c
index 82d70fd9e93..99c4faa59d8 100644
--- a/drivers/gpu/drm/i915/i915_gem_tiling.c
+++ b/drivers/gpu/drm/i915/i915_gem_tiling.c
@@ -348,7 +348,9 @@ i915_gem_set_tiling(struct drm_device *dev, void *data,
/* Rebind if we need a change of alignment */
if (!obj->map_and_fenceable) {
u32 unfenced_alignment =
- i915_gem_get_unfenced_gtt_alignment(obj);
+ i915_gem_get_unfenced_gtt_alignment(dev,
+ obj->base.size,
+ args->tiling_mode);
if (obj->gtt_offset & (unfenced_alignment - 1))
ret = i915_gem_object_unbind(obj);
}
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 21b6f93fe91..0f1c799afea 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -4305,7 +4305,8 @@ static void intel_update_watermarks(struct drm_device *dev)
static inline bool intel_panel_use_ssc(struct drm_i915_private *dev_priv)
{
- return dev_priv->lvds_use_ssc && i915_panel_use_ssc;
+ return dev_priv->lvds_use_ssc && i915_panel_use_ssc
+ && !(dev_priv->quirks & QUIRK_LVDS_SSC_DISABLE);
}
static int i9xx_crtc_mode_set(struct drm_crtc *crtc,
@@ -7810,6 +7811,15 @@ static void quirk_pipea_force (struct drm_device *dev)
DRM_DEBUG_DRIVER("applying pipe a force quirk\n");
}
+/*
+ * Some machines (Lenovo U160) do not work with SSC on LVDS for some reason
+ */
+static void quirk_ssc_force_disable(struct drm_device *dev)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ dev_priv->quirks |= QUIRK_LVDS_SSC_DISABLE;
+}
+
struct intel_quirk {
int device;
int subsystem_vendor;
@@ -7838,6 +7848,9 @@ struct intel_quirk intel_quirks[] = {
/* 855 & before need to leave pipe A & dpll A up */
{ 0x3582, PCI_ANY_ID, PCI_ANY_ID, quirk_pipea_force },
{ 0x2562, PCI_ANY_ID, PCI_ANY_ID, quirk_pipea_force },
+
+ /* Lenovo U160 cannot use SSC on LVDS */
+ { 0x0046, 0x17aa, 0x3920, quirk_ssc_force_disable },
};
static void intel_init_quirks(struct drm_device *dev)
diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c
index 65626c1c446..6c3fb5ab20f 100644
--- a/drivers/mtd/ubi/build.c
+++ b/drivers/mtd/ubi/build.c
@@ -953,10 +953,14 @@ int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num, int vid_hdr_offset)
if (!ubi->peb_buf2)
goto out_free;
+ err = ubi_debugging_init_dev(ubi);
+ if (err)
+ goto out_free;
+
err = attach_by_scanning(ubi);
if (err) {
dbg_err("failed to attach by scanning, error %d", err);
- goto out_free;
+ goto out_debugging;
}
if (ubi->autoresize_vol_id != -1) {
@@ -969,12 +973,16 @@ int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num, int vid_hdr_offset)
if (err)
goto out_detach;
+ err = ubi_debugfs_init_dev(ubi);
+ if (err)
+ goto out_uif;
+
ubi->bgt_thread = kthread_create(ubi_thread, ubi, ubi->bgt_name);
if (IS_ERR(ubi->bgt_thread)) {
err = PTR_ERR(ubi->bgt_thread);
ubi_err("cannot spawn \"%s\", error %d", ubi->bgt_name,
err);
- goto out_uif;
+ goto out_debugfs;
}
ubi_msg("attached mtd%d to ubi%d", mtd->index, ubi_num);
@@ -1008,12 +1016,18 @@ int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num, int vid_hdr_offset)
ubi_notify_all(ubi, UBI_VOLUME_ADDED, NULL);
return ubi_num;
+out_debugfs:
+ ubi_debugfs_exit_dev(ubi);
out_uif:
+ get_device(&ubi->dev);
+ ubi_assert(ref);
uif_close(ubi);
out_detach:
ubi_wl_close(ubi);
free_internal_volumes(ubi);
vfree(ubi->vtbl);
+out_debugging:
+ ubi_debugging_exit_dev(ubi);
out_free:
vfree(ubi->peb_buf1);
vfree(ubi->peb_buf2);
@@ -1080,11 +1094,13 @@ int ubi_detach_mtd_dev(int ubi_num, int anyway)
*/
get_device(&ubi->dev);
+ ubi_debugfs_exit_dev(ubi);
uif_close(ubi);
ubi_wl_close(ubi);
free_internal_volumes(ubi);
vfree(ubi->vtbl);
put_mtd_device(ubi->mtd);
+ ubi_debugging_exit_dev(ubi);
vfree(ubi->peb_buf1);
vfree(ubi->peb_buf2);
ubi_msg("mtd%d is detached from ubi%d", ubi->mtd->index, ubi->ubi_num);
@@ -1199,6 +1215,11 @@ static int __init ubi_init(void)
if (!ubi_wl_entry_slab)
goto out_dev_unreg;
+ err = ubi_debugfs_init();
+ if (err)
+ goto out_slab;
+
+
/* Attach MTD devices */
for (i = 0; i < mtd_devs; i++) {
struct mtd_dev_param *p = &mtd_dev_param[i];
@@ -1247,6 +1268,8 @@ out_detach:
ubi_detach_mtd_dev(ubi_devices[k]->ubi_num, 1);
mutex_unlock(&ubi_devices_mutex);
}
+ ubi_debugfs_exit();
+out_slab:
kmem_cache_destroy(ubi_wl_entry_slab);
out_dev_unreg:
misc_deregister(&ubi_ctrl_cdev);
@@ -1270,6 +1293,7 @@ static void __exit ubi_exit(void)
ubi_detach_mtd_dev(ubi_devices[i]->ubi_num, 1);
mutex_unlock(&ubi_devices_mutex);
}
+ ubi_debugfs_exit();
kmem_cache_destroy(ubi_wl_entry_slab);
misc_deregister(&ubi_ctrl_cdev);
class_remove_file(ubi_class, &ubi_version);
diff --git a/drivers/mtd/ubi/debug.c b/drivers/mtd/ubi/debug.c
index 2224cbe41dd..ab80c0debac 100644
--- a/drivers/mtd/ubi/debug.c
+++ b/drivers/mtd/ubi/debug.c
@@ -27,17 +27,9 @@
#ifdef CONFIG_MTD_UBI_DEBUG
#include "ubi.h"
+#include <linux/debugfs.h>
+#include <linux/uaccess.h>
#include <linux/module.h>
-#include <linux/moduleparam.h>
-
-unsigned int ubi_chk_flags;
-unsigned int ubi_tst_flags;
-
-module_param_named(debug_chks, ubi_chk_flags, uint, S_IRUGO | S_IWUSR);
-module_param_named(debug_tsts, ubi_chk_flags, uint, S_IRUGO | S_IWUSR);
-
-MODULE_PARM_DESC(debug_chks, "Debug check flags");
-MODULE_PARM_DESC(debug_tsts, "Debug special test flags");
/**
* ubi_dbg_dump_ec_hdr - dump an erase counter header.
@@ -239,4 +231,261 @@ out:
return;
}
+/**
+ * ubi_debugging_init_dev - initialize debugging for an UBI device.
+ * @ubi: UBI device description object
+ *
+ * This function initializes debugging-related data for UBI device @ubi.
+ * Returns zero in case of success and a negative error code in case of
+ * failure.
+ */
+int ubi_debugging_init_dev(struct ubi_device *ubi)
+{
+ ubi->dbg = kzalloc(sizeof(struct ubi_debug_info), GFP_KERNEL);
+ if (!ubi->dbg)
+ return -ENOMEM;
+
+ return 0;
+}
+
+/**
+ * ubi_debugging_exit_dev - free debugging data for an UBI device.
+ * @ubi: UBI device description object
+ */
+void ubi_debugging_exit_dev(struct ubi_device *ubi)
+{
+ kfree(ubi->dbg);
+}
+
+/*
+ * Root directory for UBI stuff in debugfs. Contains sub-directories which
+ * contain the stuff specific to particular UBI devices.
+ */
+static struct dentry *dfs_rootdir;
+
+/**
+ * ubi_debugfs_init - create UBI debugfs directory.
+ *
+ * Create UBI debugfs directory. Returns zero in case of success and a negative
+ * error code in case of failure.
+ */
+int ubi_debugfs_init(void)
+{
+ dfs_rootdir = debugfs_create_dir("ubi", NULL);
+ if (IS_ERR_OR_NULL(dfs_rootdir)) {
+ int err = dfs_rootdir ? -ENODEV : PTR_ERR(dfs_rootdir);
+
+ ubi_err("cannot create \"ubi\" debugfs directory, error %d\n",
+ err);
+ return err;
+ }
+
+ return 0;
+}
+
+/**
+ * ubi_debugfs_exit - remove UBI debugfs directory.
+ */
+void ubi_debugfs_exit(void)
+{
+ debugfs_remove(dfs_rootdir);
+}
+
+/* Read an UBI debugfs file */
+static ssize_t dfs_file_read(struct file *file, char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ unsigned long ubi_num = (unsigned long)file->private_data;
+ struct dentry *dent = file->f_path.dentry;
+ struct ubi_device *ubi;
+ struct ubi_debug_info *d;
+ char buf[3];
+ int val;
+
+ ubi = ubi_get_device(ubi_num);
+ if (!ubi)
+ return -ENODEV;
+ d = ubi->dbg;
+
+ if (dent == d->dfs_chk_gen)
+ val = d->chk_gen;
+ else if (dent == d->dfs_chk_io)
+ val = d->chk_io;
+ else if (dent == d->dfs_disable_bgt)
+ val = d->disable_bgt;
+ else if (dent == d->dfs_emulate_bitflips)
+ val = d->emulate_bitflips;
+ else if (dent == d->dfs_emulate_io_failures)
+ val = d->emulate_io_failures;
+ else {
+ count = -EINVAL;
+ goto out;
+ }
+
+ if (val)
+ buf[0] = '1';
+ else
+ buf[0] = '0';
+ buf[1] = '\n';
+ buf[2] = 0x00;
+
+ count = simple_read_from_buffer(user_buf, count, ppos, buf, 2);
+
+out:
+ ubi_put_device(ubi);
+ return count;
+}
+
+/* Write an UBI debugfs file */
+static ssize_t dfs_file_write(struct file *file, const char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ unsigned long ubi_num = (unsigned long)file->private_data;
+ struct dentry *dent = file->f_path.dentry;
+ struct ubi_device *ubi;
+ struct ubi_debug_info *d;
+ size_t buf_size;
+ char buf[8];
+ int val;
+
+ ubi = ubi_get_device(ubi_num);
+ if (!ubi)
+ return -ENODEV;
+ d = ubi->dbg;
+
+ buf_size = min_t(size_t, count, (sizeof(buf) - 1));
+ if (copy_from_user(buf, user_buf, buf_size)) {
+ count = -EFAULT;
+ goto out;
+ }
+
+ if (buf[0] == '1')
+ val = 1;
+ else if (buf[0] == '0')
+ val = 0;
+ else {
+ count = -EINVAL;
+ goto out;
+ }
+
+ if (dent == d->dfs_chk_gen)
+ d->chk_gen = val;
+ else if (dent == d->dfs_chk_io)
+ d->chk_io = val;
+ else if (dent == d->dfs_disable_bgt)
+ d->disable_bgt = val;
+ else if (dent == d->dfs_emulate_bitflips)
+ d->emulate_bitflips = val;
+ else if (dent == d->dfs_emulate_io_failures)
+ d->emulate_io_failures = val;
+ else
+ count = -EINVAL;
+
+out:
+ ubi_put_device(ubi);
+ return count;
+}
+
+static int default_open(struct inode *inode, struct file *file)
+{
+ if (inode->i_private)
+ file->private_data = inode->i_private;
+
+ return 0;
+}
+
+/* File operations for all UBI debugfs files */
+static const struct file_operations dfs_fops = {
+ .read = dfs_file_read,
+ .write = dfs_file_write,
+ .open = default_open,
+ .llseek = no_llseek,
+ .owner = THIS_MODULE,
+};
+
+/**
+ * ubi_debugfs_init_dev - initialize debugfs for an UBI device.
+ * @ubi: UBI device description object
+ *
+ * This function creates all debugfs files for UBI device @ubi. Returns zero in
+ * case of success and a negative error code in case of failure.
+ */
+int ubi_debugfs_init_dev(struct ubi_device *ubi)
+{
+ int err, n;
+ unsigned long ubi_num = ubi->ubi_num;
+ const char *fname;
+ struct dentry *dent;
+ struct ubi_debug_info *d = ubi->dbg;
+
+ n = snprintf(d->dfs_dir_name, UBI_DFS_DIR_LEN + 1, UBI_DFS_DIR_NAME,
+ ubi->ubi_num);
+ if (n == UBI_DFS_DIR_LEN) {
+ /* The array size is too small */
+ fname = UBI_DFS_DIR_NAME;
+ dent = ERR_PTR(-EINVAL);
+ goto out;
+ }
+
+ fname = d->dfs_dir_name;
+ dent = debugfs_create_dir(fname, dfs_rootdir);
+ if (IS_ERR_OR_NULL(dent))
+ goto out;
+ d->dfs_dir = dent;
+
+ fname = "chk_gen";
+ dent = debugfs_create_file(fname, S_IWUSR, d->dfs_dir, (void *)ubi_num,
+ &dfs_fops);
+ if (IS_ERR_OR_NULL(dent))
+ goto out_remove;
+ d->dfs_chk_gen = dent;
+
+ fname = "chk_io";
+ dent = debugfs_create_file(fname, S_IWUSR, d->dfs_dir, (void *)ubi_num,
+ &dfs_fops);
+ if (IS_ERR_OR_NULL(dent))
+ goto out_remove;
+ d->dfs_chk_io = dent;
+
+ fname = "tst_disable_bgt";
+ dent = debugfs_create_file(fname, S_IWUSR, d->dfs_dir, (void *)ubi_num,
+ &dfs_fops);
+ if (IS_ERR_OR_NULL(dent))
+ goto out_remove;
+ d->dfs_disable_bgt = dent;
+
+ fname = "tst_emulate_bitflips";
+ dent = debugfs_create_file(fname, S_IWUSR, d->dfs_dir, (void *)ubi_num,
+ &dfs_fops);
+ if (IS_ERR_OR_NULL(dent))
+ goto out_remove;
+ d->dfs_emulate_bitflips = dent;
+
+ fname = "tst_emulate_io_failures";
+ dent = debugfs_create_file(fname, S_IWUSR, d->dfs_dir, (void *)ubi_num,
+ &dfs_fops);
+ if (IS_ERR_OR_NULL(dent))
+ goto out_remove;
+ d->dfs_emulate_io_failures = dent;
+
+ return 0;
+
+out_remove:
+ debugfs_remove_recursive(d->dfs_dir);
+out:
+ err = dent ? PTR_ERR(dent) : -ENODEV;
+ ubi_err("cannot create \"%s\" debugfs file or directory, error %d\n",
+ fname, err);
+ return err;
+}
+
+/**
+ * dbg_debug_exit_dev - free all debugfs files corresponding to device @ubi
+ * @ubi: UBI device description object
+ */
+void ubi_debugfs_exit_dev(struct ubi_device *ubi)
+{
+ debugfs_remove_recursive(ubi->dbg->dfs_dir);
+}
+
#endif /* CONFIG_MTD_UBI_DEBUG */
diff --git a/drivers/mtd/ubi/debug.h b/drivers/mtd/ubi/debug.h
index 3f1a09c5c43..65b5b76cc37 100644
--- a/drivers/mtd/ubi/debug.h
+++ b/drivers/mtd/ubi/debug.h
@@ -21,14 +21,6 @@
#ifndef __UBI_DEBUG_H__
#define __UBI_DEBUG_H__
-struct ubi_ec_hdr;
-struct ubi_vid_hdr;
-struct ubi_volume;
-struct ubi_vtbl_record;
-struct ubi_scan_volume;
-struct ubi_scan_leb;
-struct ubi_mkvol_req;
-
#ifdef CONFIG_MTD_UBI_DEBUG
#include <linux/random.h>
@@ -71,86 +63,103 @@ void ubi_dbg_dump_sv(const struct ubi_scan_volume *sv);
void ubi_dbg_dump_seb(const struct ubi_scan_leb *seb, int type);
void ubi_dbg_dump_mkvol_req(const struct ubi_mkvol_req *req);
void ubi_dbg_dump_flash(struct ubi_device *ubi, int pnum, int offset, int len);
-
-extern unsigned int ubi_chk_flags;
-
-/*
- * Debugging check flags.
- *
- * UBI_CHK_GEN: general checks
- * UBI_CHK_IO: check writes and erases
- */
-enum {
- UBI_CHK_GEN = 0x1,
- UBI_CHK_IO = 0x2,
-};
-
int ubi_dbg_check_all_ff(struct ubi_device *ubi, int pnum, int offset, int len);
int ubi_dbg_check_write(struct ubi_device *ubi, const void *buf, int pnum,
int offset, int len);
-
-extern unsigned int ubi_tst_flags;
+int ubi_debugging_init_dev(struct ubi_device *ubi);
+void ubi_debugging_exit_dev(struct ubi_device *ubi);
+int ubi_debugfs_init(void);
+void ubi_debugfs_exit(void);
+int ubi_debugfs_init_dev(struct ubi_device *ubi);
+void ubi_debugfs_exit_dev(struct ubi_device *ubi);
/*
- * Special testing flags.
+ * The UBI debugfs directory name pattern and maximum name length (3 for "ubi"
+ * + 2 for the number plus 1 for the trailing zero byte.
+ */
+#define UBI_DFS_DIR_NAME "ubi%d"
+#define UBI_DFS_DIR_LEN (3 + 2 + 1)
+
+/**
+ * struct ubi_debug_info - debugging information for an UBI device.
*
- * UBIFS_TST_DISABLE_BGT: disable the background thread
- * UBI_TST_EMULATE_BITFLIPS: emulate bit-flips
- * UBI_TST_EMULATE_WRITE_FAILURES: emulate write failures
- * UBI_TST_EMULATE_ERASE_FAILURES: emulate erase failures
+ * @chk_gen: if UBI general extra checks are enabled
+ * @chk_io: if UBI I/O extra checks are enabled
+ * @disable_bgt: disable the background task for testing purposes
+ * @emulate_bitflips: emulate bit-flips for testing purposes
+ * @emulate_io_failures: emulate write/erase failures for testing purposes
+ * @dfs_dir_name: name of debugfs directory containing files of this UBI device
+ * @dfs_dir: direntry object of the UBI device debugfs directory
+ * @dfs_chk_gen: debugfs knob to enable UBI general extra checks
+ * @dfs_chk_io: debugfs knob to enable UBI I/O extra checks
+ * @dfs_disable_bgt: debugfs knob to disable the background task
+ * @dfs_emulate_bitflips: debugfs knob to emulate bit-flips
+ * @dfs_emulate_io_failures: debugfs knob to emulate write/erase failures
*/
-enum {
- UBI_TST_DISABLE_BGT = 0x1,
- UBI_TST_EMULATE_BITFLIPS = 0x2,
- UBI_TST_EMULATE_WRITE_FAILURES = 0x4,
- UBI_TST_EMULATE_ERASE_FAILURES = 0x8,
+struct ubi_debug_info {
+ unsigned int chk_gen:1;
+ unsigned int chk_io:1;
+ unsigned int disable_bgt:1;
+ unsigned int emulate_bitflips:1;
+ unsigned int emulate_io_failures:1;
+ char dfs_dir_name[UBI_DFS_DIR_LEN + 1];
+ struct dentry *dfs_dir;
+ struct dentry *dfs_chk_gen;
+ struct dentry *dfs_chk_io;
+ struct dentry *dfs_disable_bgt;
+ struct dentry *dfs_emulate_bitflips;
+ struct dentry *dfs_emulate_io_failures;
};
/**
* ubi_dbg_is_bgt_disabled - if the background thread is disabled.
+ * @ubi: UBI device description object
*
* Returns non-zero if the UBI background thread is disabled for testing
* purposes.
*/
-static inline int ubi_dbg_is_bgt_disabled(void)
+static inline int ubi_dbg_is_bgt_disabled(const struct ubi_device *ubi)
{
- return ubi_tst_flags & UBI_TST_DISABLE_BGT;
+ return ubi->dbg->disable_bgt;
}
/**
* ubi_dbg_is_bitflip - if it is time to emulate a bit-flip.
+ * @ubi: UBI device description object
*
* Returns non-zero if a bit-flip should be emulated, otherwise returns zero.
*/
-static inline int ubi_dbg_is_bitflip(void)
+static inline int ubi_dbg_is_bitflip(const struct ubi_device *ubi)
{
- if (ubi_tst_flags & UBI_TST_EMULATE_BITFLIPS)
+ if (ubi->dbg->emulate_bitflips)
return !(random32() % 200);
return 0;
}
/**
* ubi_dbg_is_write_failure - if it is time to emulate a write failure.
+ * @ubi: UBI device description object
*
* Returns non-zero if a write failure should be emulated, otherwise returns
* zero.
*/
-static inline int ubi_dbg_is_write_failure(void)
+static inline int ubi_dbg_is_write_failure(const struct ubi_device *ubi)
{
- if (ubi_tst_flags & UBI_TST_EMULATE_WRITE_FAILURES)
+ if (ubi->dbg->emulate_io_failures)
return !(random32() % 500);
return 0;
}
/**
* ubi_dbg_is_erase_failure - if its time to emulate an erase failure.
+ * @ubi: UBI device description object
*
* Returns non-zero if an erase failure should be emulated, otherwise returns
* zero.
*/
-static inline int ubi_dbg_is_erase_failure(void)
+static inline int ubi_dbg_is_erase_failure(const struct ubi_device *ubi)
{
- if (ubi_tst_flags & UBI_TST_EMULATE_ERASE_FAILURES)
+ if (ubi->dbg->emulate_io_failures)
return !(random32() % 400);
return 0;
}
@@ -201,11 +210,6 @@ static inline void ubi_dbg_dump_flash(struct ubi_device *ubi,
static inline void
ubi_dbg_print_hex_dump(const char *l, const char *ps, int pt, int r,
int g, const void *b, size_t len, bool a) { return; }
-
-static inline int ubi_dbg_is_bgt_disabled(void) { return 0; }
-static inline int ubi_dbg_is_bitflip(void) { return 0; }
-static inline int ubi_dbg_is_write_failure(void) { return 0; }
-static inline int ubi_dbg_is_erase_failure(void) { return 0; }
static inline int ubi_dbg_check_all_ff(struct ubi_device *ubi,
int pnum, int offset,
int len) { return 0; }
@@ -213,5 +217,20 @@ static inline int ubi_dbg_check_write(struct ubi_device *ubi,
const void *buf, int pnum,
int offset, int len) { return 0; }
+static inline int ubi_debugging_init_dev(struct ubi_device *ubi) { return 0; }
+static inline void ubi_debugging_exit_dev(struct ubi_device *ubi) { return; }
+static inline int ubi_debugfs_init(void) { return 0; }
+static inline void ubi_debugfs_exit(void) { return; }
+static inline int ubi_debugfs_init_dev(struct ubi_device *ubi) { return 0; }
+static inline void ubi_debugfs_exit_dev(struct ubi_device *ubi) { return; }
+
+static inline int
+ubi_dbg_is_bgt_disabled(const struct ubi_device *ubi) { return 0; }
+static inline int ubi_dbg_is_bitflip(const struct ubi_device *ubi) { return 0; }
+static inline int
+ubi_dbg_is_write_failure(const struct ubi_device *ubi) { return 0; }
+static inline int
+ubi_dbg_is_erase_failure(const struct ubi_device *ubi) { return 0; }
+
#endif /* !CONFIG_MTD_UBI_DEBUG */
#endif /* !__UBI_DEBUG_H__ */
diff --git a/drivers/mtd/ubi/io.c b/drivers/mtd/ubi/io.c
index 8c1b1c7bc4a..6ba55c23587 100644
--- a/drivers/mtd/ubi/io.c
+++ b/drivers/mtd/ubi/io.c
@@ -212,7 +212,7 @@ retry:
} else {
ubi_assert(len == read);
- if (ubi_dbg_is_bitflip()) {
+ if (ubi_dbg_is_bitflip(ubi)) {
dbg_gen("bit-flip (emulated)");
err = UBI_IO_BITFLIPS;
}
@@ -281,7 +281,7 @@ int ubi_io_write(struct ubi_device *ubi, const void *buf, int pnum, int offset,
return err;
}
- if (ubi_dbg_is_write_failure()) {
+ if (ubi_dbg_is_write_failure(ubi)) {
dbg_err("cannot write %d bytes to PEB %d:%d "
"(emulated)", len, pnum, offset);
ubi_dbg_dump_stack();
@@ -396,7 +396,7 @@ retry:
if (err)
return err;
- if (ubi_dbg_is_erase_failure()) {
+ if (ubi_dbg_is_erase_failure(ubi)) {
dbg_err("cannot erase PEB %d (emulated)", pnum);
return -EIO;
}
@@ -1146,7 +1146,7 @@ static int paranoid_check_not_bad(const struct ubi_device *ubi, int pnum)
{
int err;
- if (!(ubi_chk_flags & UBI_CHK_IO))
+ if (!ubi->dbg->chk_io)
return 0;
err = ubi_io_is_bad(ubi, pnum);
@@ -1173,7 +1173,7 @@ static int paranoid_check_ec_hdr(const struct ubi_device *ubi, int pnum,
int err;
uint32_t magic;
- if (!(ubi_chk_flags & UBI_CHK_IO))
+ if (!ubi->dbg->chk_io)
return 0;
magic = be32_to_cpu(ec_hdr->magic);
@@ -1211,7 +1211,7 @@ static int paranoid_check_peb_ec_hdr(const struct ubi_device *ubi, int pnum)
uint32_t crc, hdr_crc;
struct ubi_ec_hdr *ec_hdr;
- if (!(ubi_chk_flags & UBI_CHK_IO))
+ if (!ubi->dbg->chk_io)
return 0;
ec_hdr = kzalloc(ubi->ec_hdr_alsize, GFP_NOFS);
@@ -1255,7 +1255,7 @@ static int paranoid_check_vid_hdr(const struct ubi_device *ubi, int pnum,
int err;
uint32_t magic;
- if (!(ubi_chk_flags & UBI_CHK_IO))
+ if (!ubi->dbg->chk_io)
return 0;
magic = be32_to_cpu(vid_hdr->magic);
@@ -1296,7 +1296,7 @@ static int paranoid_check_peb_vid_hdr(const struct ubi_device *ubi, int pnum)
struct ubi_vid_hdr *vid_hdr;
void *p;
- if (!(ubi_chk_flags & UBI_CHK_IO))
+ if (!ubi->dbg->chk_io)
return 0;
vid_hdr = ubi_zalloc_vid_hdr(ubi, GFP_NOFS);
@@ -1348,7 +1348,7 @@ int ubi_dbg_check_write(struct ubi_device *ubi, const void *buf, int pnum,
void *buf1;
loff_t addr = (loff_t)pnum * ubi->peb_size + offset;
- if (!(ubi_chk_flags & UBI_CHK_IO))
+ if (!ubi->dbg->chk_io)
return 0;
buf1 = __vmalloc(len, GFP_NOFS, PAGE_KERNEL);
@@ -1412,7 +1412,7 @@ int ubi_dbg_check_all_ff(struct ubi_device *ubi, int pnum, int offset, int len)
void *buf;
loff_t addr = (loff_t)pnum * ubi->peb_size + offset;
- if (!(ubi_chk_flags & UBI_CHK_IO))
+ if (!ubi->dbg->chk_io)
return 0;
buf = __vmalloc(len, GFP_NOFS, PAGE_KERNEL);
diff --git a/drivers/mtd/ubi/scan.c b/drivers/mtd/ubi/scan.c
index 2135a53732f..a3a198f9b98 100644
--- a/drivers/mtd/ubi/scan.c
+++ b/drivers/mtd/ubi/scan.c
@@ -1347,7 +1347,7 @@ static int paranoid_check_si(struct ubi_device *ubi, struct ubi_scan_info *si)
struct ubi_scan_leb *seb, *last_seb;
uint8_t *buf;
- if (!(ubi_chk_flags & UBI_CHK_GEN))
+ if (!ubi->dbg->chk_gen)
return 0;
/*
diff --git a/drivers/mtd/ubi/ubi.h b/drivers/mtd/ubi/ubi.h
index c6c22295898..dc64c767fd2 100644
--- a/drivers/mtd/ubi/ubi.h
+++ b/drivers/mtd/ubi/ubi.h
@@ -44,7 +44,6 @@
#include "ubi-media.h"
#include "scan.h"
-#include "debug.h"
/* Maximum number of supported UBI devices */
#define UBI_MAX_DEVICES 32
@@ -390,6 +389,8 @@ struct ubi_wl_entry;
* @peb_buf2: another buffer of PEB size used for different purposes
* @buf_mutex: protects @peb_buf1 and @peb_buf2
* @ckvol_mutex: serializes static volume checking when opening
+ *
+ * @dbg: debugging information for this UBI device
*/
struct ubi_device {
struct cdev cdev;
@@ -472,8 +473,12 @@ struct ubi_device {
void *peb_buf2;
struct mutex buf_mutex;
struct mutex ckvol_mutex;
+
+ struct ubi_debug_info *dbg;
};
+#include "debug.h"
+
extern struct kmem_cache *ubi_wl_entry_slab;
extern const struct file_operations ubi_ctrl_cdev_operations;
extern const struct file_operations ubi_cdev_operations;
@@ -662,6 +667,7 @@ static inline void ubi_ro_mode(struct ubi_device *ubi)
if (!ubi->ro_mode) {
ubi->ro_mode = 1;
ubi_warn("switch to read-only mode");
+ ubi_dbg_dump_stack();
}
}
diff --git a/drivers/mtd/ubi/vmt.c b/drivers/mtd/ubi/vmt.c
index 366eb70219a..97e093d1967 100644
--- a/drivers/mtd/ubi/vmt.c
+++ b/drivers/mtd/ubi/vmt.c
@@ -871,7 +871,7 @@ static int paranoid_check_volumes(struct ubi_device *ubi)
{
int i, err = 0;
- if (!(ubi_chk_flags & UBI_CHK_GEN))
+ if (!ubi->dbg->chk_gen)
return 0;
for (i = 0; i < ubi->vtbl_slots; i++) {
diff --git a/drivers/mtd/ubi/vtbl.c b/drivers/mtd/ubi/vtbl.c
index fd3bf770f51..4b50a3029b8 100644
--- a/drivers/mtd/ubi/vtbl.c
+++ b/drivers/mtd/ubi/vtbl.c
@@ -307,8 +307,7 @@ static int create_vtbl(struct ubi_device *ubi, struct ubi_scan_info *si,
{
int err, tries = 0;
static struct ubi_vid_hdr *vid_hdr;
- struct ubi_scan_volume *sv;
- struct ubi_scan_leb *new_seb, *old_seb = NULL;
+ struct ubi_scan_leb *new_seb;
ubi_msg("create volume table (copy #%d)", copy + 1);
@@ -316,15 +315,6 @@ static int create_vtbl(struct ubi_device *ubi, struct ubi_scan_info *si,
if (!vid_hdr)
return -ENOMEM;
- /*
- * Check if there is a logical eraseblock which would have to contain
- * this volume table copy was found during scanning. It has to be wiped
- * out.
- */
- sv = ubi_scan_find_sv(si, UBI_LAYOUT_VOLUME_ID);
- if (sv)
- old_seb = ubi_scan_find_seb(sv, copy);
-
retry:
new_seb = ubi_scan_get_free_peb(ubi, si);
if (IS_ERR(new_seb)) {
@@ -351,8 +341,8 @@ retry:
goto write_error;
/*
- * And add it to the scanning information. Don't delete the old
- * @old_seb as it will be deleted and freed in 'ubi_scan_add_used()'.
+ * And add it to the scanning information. Don't delete the old version
+ * of this LEB as it will be deleted and freed in 'ubi_scan_add_used()'.
*/
err = ubi_scan_add_used(ubi, si, new_seb->pnum, new_seb->ec,
vid_hdr, 0);
@@ -876,7 +866,7 @@ out_free:
*/
static void paranoid_vtbl_check(const struct ubi_device *ubi)
{
- if (!(ubi_chk_flags & UBI_CHK_GEN))
+ if (!ubi->dbg->chk_gen)
return;
if (vtbl_check(ubi, ubi->vtbl)) {
diff --git a/drivers/mtd/ubi/wl.c b/drivers/mtd/ubi/wl.c
index ff2c4956eef..42c684cf368 100644
--- a/drivers/mtd/ubi/wl.c
+++ b/drivers/mtd/ubi/wl.c
@@ -1,4 +1,5 @@
/*
+ * @ubi: UBI device description object
* Copyright (c) International Business Machines Corp., 2006
*
* This program is free software; you can redistribute it and/or modify
@@ -163,12 +164,14 @@ struct ubi_work {
#ifdef CONFIG_MTD_UBI_DEBUG
static int paranoid_check_ec(struct ubi_device *ubi, int pnum, int ec);
-static int paranoid_check_in_wl_tree(struct ubi_wl_entry *e,
+static int paranoid_check_in_wl_tree(const struct ubi_device *ubi,
+ struct ubi_wl_entry *e,
struct rb_root *root);
-static int paranoid_check_in_pq(struct ubi_device *ubi, struct ubi_wl_entry *e);
+static int paranoid_check_in_pq(const struct ubi_device *ubi,
+ struct ubi_wl_entry *e);
#else
#define paranoid_check_ec(ubi, pnum, ec) 0
-#define paranoid_check_in_wl_tree(e, root)
+#define paranoid_check_in_wl_tree(ubi, e, root)
#define paranoid_check_in_pq(ubi, e) 0
#endif
@@ -449,7 +452,7 @@ retry:
BUG();
}
- paranoid_check_in_wl_tree(e, &ubi->free);
+ paranoid_check_in_wl_tree(ubi, e, &ubi->free);
/*
* Move the physical eraseblock to the protection queue where it will
@@ -613,7 +616,7 @@ static void schedule_ubi_work(struct ubi_device *ubi, struct ubi_work *wrk)
list_add_tail(&wrk->list, &ubi->works);
ubi_assert(ubi->works_count >= 0);
ubi->works_count += 1;
- if (ubi->thread_enabled && !ubi_dbg_is_bgt_disabled())
+ if (ubi->thread_enabled && !ubi_dbg_is_bgt_disabled(ubi))
wake_up_process(ubi->bgt_thread);
spin_unlock(&ubi->wl_lock);
}
@@ -712,7 +715,7 @@ static int wear_leveling_worker(struct ubi_device *ubi, struct ubi_work *wrk,
e1->ec, e2->ec);
goto out_cancel;
}
- paranoid_check_in_wl_tree(e1, &ubi->used);
+ paranoid_check_in_wl_tree(ubi, e1, &ubi->used);
rb_erase(&e1->u.rb, &ubi->used);
dbg_wl("move PEB %d EC %d to PEB %d EC %d",
e1->pnum, e1->ec, e2->pnum, e2->ec);
@@ -721,12 +724,12 @@ static int wear_leveling_worker(struct ubi_device *ubi, struct ubi_work *wrk,
scrubbing = 1;
e1 = rb_entry(rb_first(&ubi->scrub), struct ubi_wl_entry, u.rb);
e2 = find_wl_entry(&ubi->free, WL_FREE_MAX_DIFF);
- paranoid_check_in_wl_tree(e1, &ubi->scrub);
+ paranoid_check_in_wl_tree(ubi, e1, &ubi->scrub);
rb_erase(&e1->u.rb, &ubi->scrub);
dbg_wl("scrub PEB %d to PEB %d", e1->pnum, e2->pnum);
}
- paranoid_check_in_wl_tree(e2, &ubi->free);
+ paranoid_check_in_wl_tree(ubi, e2, &ubi->free);
rb_erase(&e2->u.rb, &ubi->free);
ubi->move_from = e1;
ubi->move_to = e2;
@@ -1169,13 +1172,13 @@ retry:
return 0;
} else {
if (in_wl_tree(e, &ubi->used)) {
- paranoid_check_in_wl_tree(e, &ubi->used);
+ paranoid_check_in_wl_tree(ubi, e, &ubi->used);
rb_erase(&e->u.rb, &ubi->used);
} else if (in_wl_tree(e, &ubi->scrub)) {
- paranoid_check_in_wl_tree(e, &ubi->scrub);
+ paranoid_check_in_wl_tree(ubi, e, &ubi->scrub);
rb_erase(&e->u.rb, &ubi->scrub);
} else if (in_wl_tree(e, &ubi->erroneous)) {
- paranoid_check_in_wl_tree(e, &ubi->erroneous);
+ paranoid_check_in_wl_tree(ubi, e, &ubi->erroneous);
rb_erase(&e->u.rb, &ubi->erroneous);
ubi->erroneous_peb_count -= 1;
ubi_assert(ubi->erroneous_peb_count >= 0);
@@ -1242,7 +1245,7 @@ retry:
}
if (in_wl_tree(e, &ubi->used)) {
- paranoid_check_in_wl_tree(e, &ubi->used);
+ paranoid_check_in_wl_tree(ubi, e, &ubi->used);
rb_erase(&e->u.rb, &ubi->used);
} else {
int err;
@@ -1364,7 +1367,7 @@ int ubi_thread(void *u)
spin_lock(&ubi->wl_lock);
if (list_empty(&ubi->works) || ubi->ro_mode ||
- !ubi->thread_enabled || ubi_dbg_is_bgt_disabled()) {
+ !ubi->thread_enabled || ubi_dbg_is_bgt_disabled(ubi)) {
set_current_state(TASK_INTERRUPTIBLE);
spin_unlock(&ubi->wl_lock);
schedule();
@@ -1579,7 +1582,7 @@ static int paranoid_check_ec(struct ubi_device *ubi, int pnum, int ec)
long long read_ec;
struct ubi_ec_hdr *ec_hdr;
- if (!(ubi_chk_flags & UBI_CHK_GEN))
+ if (!ubi->dbg->chk_gen)
return 0;
ec_hdr = kzalloc(ubi->ec_hdr_alsize, GFP_NOFS);
@@ -1609,16 +1612,18 @@ out_free:
/**
* paranoid_check_in_wl_tree - check that wear-leveling entry is in WL RB-tree.
+ * @ubi: UBI device description object
* @e: the wear-leveling entry to check
* @root: the root of the tree
*
* This function returns zero if @e is in the @root RB-tree and %-EINVAL if it
* is not.
*/
-static int paranoid_check_in_wl_tree(struct ubi_wl_entry *e,
+static int paranoid_check_in_wl_tree(const struct ubi_device *ubi,
+ struct ubi_wl_entry *e,
struct rb_root *root)
{
- if (!(ubi_chk_flags & UBI_CHK_GEN))
+ if (!ubi->dbg->chk_gen)
return 0;
if (in_wl_tree(e, root))
@@ -1638,12 +1643,13 @@ static int paranoid_check_in_wl_tree(struct ubi_wl_entry *e,
*
* This function returns zero if @e is in @ubi->pq and %-EINVAL if it is not.
*/
-static int paranoid_check_in_pq(struct ubi_device *ubi, struct ubi_wl_entry *e)
+static int paranoid_check_in_pq(const struct ubi_device *ubi,
+ struct ubi_wl_entry *e)
{
struct ubi_wl_entry *p;
int i;
- if (!(ubi_chk_flags & UBI_CHK_GEN))
+ if (!ubi->dbg->chk_gen)
return 0;
for (i = 0; i < UBI_PROT_QUEUE_LEN; ++i)
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-26 08:37:44 +0000