Commit 2071a3e9 authored by Federico Vaga's avatar Federico Vaga Committed by Greg Kroah-Hartman

drivers/fmc: The only way to dump the SDB is from debugfs

Driver should not call fmc_sdb_dump() anymore. (actually they can but the
operation is not supported, so it will print an error message)
Signed-off-by: default avatarFederico Vaga <federico.vaga@cern.ch>
Tested-by: default avatarPat Riehecky <riehecky@fnal.gov>
Acked-by: default avatarAlessandro Rubini <rubini@gnudd.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 9f757f41
......@@ -6,6 +6,7 @@ fmc-y += fmc-match.o
fmc-y += fmc-sdb.o
fmc-y += fru-parse.o
fmc-y += fmc-dump.o
fmc-y += fmc-debug.o
obj-$(CONFIG_FMC_FAKEDEV) += fmc-fakedev.o
obj-$(CONFIG_FMC_TRIVIAL) += fmc-trivial.o
......
......@@ -13,6 +13,9 @@
#include <linux/init.h>
#include <linux/device.h>
#include <linux/fmc.h>
#include <linux/fmc-sdb.h>
#include "fmc-private.h"
static int fmc_check_version(unsigned long version, const char *name)
{
......@@ -289,7 +292,7 @@ int fmc_device_register_n(struct fmc_device **devs, int n)
}
/* This device went well, give information to the user */
fmc_dump_eeprom(fmc);
fmc_dump_sdb(fmc);
fmc_debug_init(fmc);
}
return 0;
......@@ -301,6 +304,7 @@ int fmc_device_register_n(struct fmc_device **devs, int n)
kfree(devarray);
for (i--; i >= 0; i--) {
fmc_debug_exit(devs[i]);
sysfs_remove_bin_file(&devs[i]->dev.kobj, &fmc_eeprom_attr);
device_del(&devs[i]->dev);
fmc_free_id_info(devs[i]);
......@@ -328,6 +332,7 @@ void fmc_device_unregister_n(struct fmc_device **devs, int n)
kfree(devs[0]->devarray);
for (i = 0; i < n; i++) {
fmc_debug_exit(devs[i]);
sysfs_remove_bin_file(&devs[i]->dev.kobj, &fmc_eeprom_attr);
device_del(&devs[i]->dev);
fmc_free_id_info(devs[i]);
......
/*
* Copyright (C) 2015 CERN (www.cern.ch)
* Author: Federico Vaga <federico.vaga@cern.ch>
*
* Released according to the GNU GPL, version 2 or any later version.
*/
#include <linux/module.h>
#include <linux/device.h>
#include <linux/init.h>
#include <linux/fs.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <asm/byteorder.h>
#include <linux/fmc.h>
#include <linux/sdb.h>
#include <linux/fmc-sdb.h>
#define FMC_DBG_SDB_DUMP "dump_sdb"
static char *__strip_trailing_space(char *buf, char *str, int len)
{
int i = len - 1;
memcpy(buf, str, len);
buf[len] = '\0';
while (i >= 0 && buf[i] == ' ')
buf[i--] = '\0';
return buf;
}
#define __sdb_string(buf, field) ({ \
BUILD_BUG_ON(sizeof(buf) < sizeof(field)); \
__strip_trailing_space(buf, (void *)(field), sizeof(field)); \
})
/**
* We do not check seq_printf() errors because we want to see things in any case
*/
static void fmc_sdb_dump_recursive(struct fmc_device *fmc, struct seq_file *s,
const struct sdb_array *arr)
{
unsigned long base = arr->baseaddr;
int i, j, n = arr->len, level = arr->level;
char tmp[64];
for (i = 0; i < n; i++) {
union sdb_record *r;
struct sdb_product *p;
struct sdb_component *c;
r = &arr->record[i];
c = &r->dev.sdb_component;
p = &c->product;
for (j = 0; j < level; j++)
seq_printf(s, " ");
switch (r->empty.record_type) {
case sdb_type_interconnect:
seq_printf(s, "%08llx:%08x %.19s\n",
__be64_to_cpu(p->vendor_id),
__be32_to_cpu(p->device_id),
p->name);
break;
case sdb_type_device:
seq_printf(s, "%08llx:%08x %.19s (%08llx-%08llx)\n",
__be64_to_cpu(p->vendor_id),
__be32_to_cpu(p->device_id),
p->name,
__be64_to_cpu(c->addr_first) + base,
__be64_to_cpu(c->addr_last) + base);
break;
case sdb_type_bridge:
seq_printf(s, "%08llx:%08x %.19s (bridge: %08llx)\n",
__be64_to_cpu(p->vendor_id),
__be32_to_cpu(p->device_id),
p->name,
__be64_to_cpu(c->addr_first) + base);
if (IS_ERR(arr->subtree[i])) {
seq_printf(s, "SDB: (bridge error %li)\n",
PTR_ERR(arr->subtree[i]));
break;
}
fmc_sdb_dump_recursive(fmc, s, arr->subtree[i]);
break;
case sdb_type_integration:
seq_printf(s, "integration\n");
break;
case sdb_type_repo_url:
seq_printf(s, "Synthesis repository: %s\n",
__sdb_string(tmp, r->repo_url.repo_url));
break;
case sdb_type_synthesis:
seq_printf(s, "Bitstream '%s' ",
__sdb_string(tmp, r->synthesis.syn_name));
seq_printf(s, "synthesized %08x by %s ",
__be32_to_cpu(r->synthesis.date),
__sdb_string(tmp, r->synthesis.user_name));
seq_printf(s, "(%s version %x), ",
__sdb_string(tmp, r->synthesis.tool_name),
__be32_to_cpu(r->synthesis.tool_version));
seq_printf(s, "commit %pm\n",
r->synthesis.commit_id);
break;
case sdb_type_empty:
seq_printf(s, "empty\n");
break;
default:
seq_printf(s, "UNKNOWN TYPE 0x%02x\n",
r->empty.record_type);
break;
}
}
}
static int fmc_sdb_dump(struct seq_file *s, void *offset)
{
struct fmc_device *fmc = s->private;
if (!fmc->sdb) {
seq_printf(s, "no SDB information\n");
return 0;
}
seq_printf(s, "FMC: %s (%s), slot %i, device %s\n", dev_name(fmc->hwdev),
fmc->carrier_name, fmc->slot_id, dev_name(&fmc->dev));
/* Dump SDB information */
fmc_sdb_dump_recursive(fmc, s, fmc->sdb);
return 0;
}
static int fmc_sdb_dump_open(struct inode *inode, struct file *file)
{
struct fmc_device *fmc = inode->i_private;
return single_open(file, fmc_sdb_dump, fmc);
}
const struct file_operations fmc_dbgfs_sdb_dump = {
.owner = THIS_MODULE,
.open = fmc_sdb_dump_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
int fmc_debug_init(struct fmc_device *fmc)
{
fmc->dbg_dir = debugfs_create_dir(dev_name(&fmc->dev), NULL);
if (IS_ERR_OR_NULL(fmc->dbg_dir)) {
pr_err("FMC: Cannot create debugfs\n");
return PTR_ERR(fmc->dbg_dir);
}
fmc->dbg_sdb_dump = debugfs_create_file(FMC_DBG_SDB_DUMP, 0444,
fmc->dbg_dir, fmc,
&fmc_dbgfs_sdb_dump);
if (IS_ERR_OR_NULL(fmc->dbg_sdb_dump))
pr_err("FMC: Cannot create debugfs file %s\n",
FMC_DBG_SDB_DUMP);
return 0;
}
void fmc_debug_exit(struct fmc_device *fmc)
{
if (fmc->dbg_dir)
debugfs_remove_recursive(fmc->dbg_dir);
}
......@@ -15,8 +15,6 @@
static int fmc_must_dump_eeprom;
module_param_named(dump_eeprom, fmc_must_dump_eeprom, int, 0644);
static int fmc_must_dump_sdb;
module_param_named(dump_sdb, fmc_must_dump_sdb, int, 0644);
#define LINELEN 16
......@@ -59,42 +57,3 @@ void fmc_dump_eeprom(const struct fmc_device *fmc)
for (i = 0; i < fmc->eeprom_len; i += LINELEN, line += LINELEN)
prev = dump_line(i, line, prev);
}
void fmc_dump_sdb(const struct fmc_device *fmc)
{
const uint8_t *line, *prev;
int i, len;
if (!fmc->sdb)
return;
if (!fmc_must_dump_sdb)
return;
/* If the argument is not-zero, do simple dump (== show) */
if (fmc_must_dump_sdb > 0)
fmc_show_sdb_tree(fmc);
if (fmc_must_dump_sdb == 1)
return;
/* If bigger than 1, dump it seriously, to help debugging */
/*
* Here we should really use libsdbfs (which is designed to
* work in kernel space as well) , but it doesn't support
* directories yet, and it requires better intergration (it
* should be used instead of fmc-specific code).
*
* So, lazily, just dump the top-level array
*/
pr_info("FMC: %s (%s), slot %i, device %s\n", dev_name(fmc->hwdev),
fmc->carrier_name, fmc->slot_id, dev_name(&fmc->dev));
pr_info("FMC: poor dump of sdb first level:\n");
len = fmc->sdb->len * sizeof(union sdb_record);
line = (void *)fmc->sdb->record;
prev = NULL;
for (i = 0; i < len; i += LINELEN, line += LINELEN)
prev = dump_line(i, line, prev);
return;
}
/*
* Copyright (C) 2015 CERN (www.cern.ch)
* Author: Federico Vaga <federico.vaga@cern.ch>
*
* Released according to the GNU GPL, version 2 or any later version.
*/
extern int fmc_debug_init(struct fmc_device *fmc);
extern void fmc_debug_exit(struct fmc_device *fmc);
......@@ -145,108 +145,15 @@ int fmc_reprogram(struct fmc_device *fmc, struct fmc_driver *d, char *gw,
sdb_entry);
return -ENODEV;
}
fmc_dump_sdb(fmc);
return 0;
}
EXPORT_SYMBOL(fmc_reprogram);
static char *__strip_trailing_space(char *buf, char *str, int len)
{
int i = len - 1;
memcpy(buf, str, len);
while(i >= 0 && buf[i] == ' ')
buf[i--] = '\0';
return buf;
}
#define __sdb_string(buf, field) ({ \
BUILD_BUG_ON(sizeof(buf) < sizeof(field)); \
__strip_trailing_space(buf, (void *)(field), sizeof(field)); \
})
static void __fmc_show_sdb_tree(const struct fmc_device *fmc,
const struct sdb_array *arr)
{
unsigned long base = arr->baseaddr;
int i, j, n = arr->len, level = arr->level;
char buf[64];
for (i = 0; i < n; i++) {
union sdb_record *r;
struct sdb_product *p;
struct sdb_component *c;
r = &arr->record[i];
c = &r->dev.sdb_component;
p = &c->product;
dev_info(&fmc->dev, "SDB: ");
for (j = 0; j < level; j++)
printk(KERN_CONT " ");
switch (r->empty.record_type) {
case sdb_type_interconnect:
printk(KERN_CONT "%08llx:%08x %.19s\n",
__be64_to_cpu(p->vendor_id),
__be32_to_cpu(p->device_id),
p->name);
break;
case sdb_type_device:
printk(KERN_CONT "%08llx:%08x %.19s (%08llx-%08llx)\n",
__be64_to_cpu(p->vendor_id),
__be32_to_cpu(p->device_id),
p->name,
__be64_to_cpu(c->addr_first) + base,
__be64_to_cpu(c->addr_last) + base);
break;
case sdb_type_bridge:
printk(KERN_CONT "%08llx:%08x %.19s (bridge: %08llx)\n",
__be64_to_cpu(p->vendor_id),
__be32_to_cpu(p->device_id),
p->name,
__be64_to_cpu(c->addr_first) + base);
if (IS_ERR(arr->subtree[i])) {
dev_info(&fmc->dev, "SDB: (bridge error %li)\n",
PTR_ERR(arr->subtree[i]));
break;
}
__fmc_show_sdb_tree(fmc, arr->subtree[i]);
break;
case sdb_type_integration:
printk(KERN_CONT "integration\n");
break;
case sdb_type_repo_url:
printk(KERN_CONT "Synthesis repository: %s\n",
__sdb_string(buf, r->repo_url.repo_url));
break;
case sdb_type_synthesis:
printk(KERN_CONT "Bitstream '%s' ",
__sdb_string(buf, r->synthesis.syn_name));
printk(KERN_CONT "synthesized %08x by %s ",
__be32_to_cpu(r->synthesis.date),
__sdb_string(buf, r->synthesis.user_name));
printk(KERN_CONT "(%s version %x), ",
__sdb_string(buf, r->synthesis.tool_name),
__be32_to_cpu(r->synthesis.tool_version));
printk(KERN_CONT "commit %pm\n",
r->synthesis.commit_id);
break;
case sdb_type_empty:
printk(KERN_CONT "empty\n");
break;
default:
printk(KERN_CONT "UNKNOWN TYPE 0x%02x\n",
r->empty.record_type);
break;
}
}
}
void fmc_show_sdb_tree(const struct fmc_device *fmc)
{
if (!fmc->sdb)
return;
__fmc_show_sdb_tree(fmc, fmc->sdb);
pr_err("%s: not supported anymore, use debugfs to dump SDB\n",
__func__);
}
EXPORT_SYMBOL(fmc_show_sdb_tree);
......
......@@ -180,6 +180,9 @@ struct fmc_device {
uint32_t device_id; /* Filled by the device */
char *mezzanine_name; /* Defaults to ``fmc'' */
void *mezzanine_data;
struct dentry *dbg_dir;
struct dentry *dbg_sdb_dump;
};
#define to_fmc_device(x) container_of((x), struct fmc_device, dev)
......@@ -232,7 +235,6 @@ extern int fmc_match(struct device *dev, struct device_driver *drv);
extern int fmc_fill_id_info(struct fmc_device *fmc);
extern void fmc_free_id_info(struct fmc_device *fmc);
extern void fmc_dump_eeprom(const struct fmc_device *fmc);
extern void fmc_dump_sdb(const struct fmc_device *fmc);
/* helpers for FMC operations */
extern int fmc_irq_request(struct fmc_device *fmc, irq_handler_t h,
......
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