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authorRobert Richter <robert.richter@linaro.org>2013-10-30 01:56:13 +0400
committerRobert Richter <rric@kernel.org>2013-11-05 03:01:11 +0400
commit78cfbf0bbf6e085fd71e156c6147d205fba29f2b (patch)
treeeca74fce12cccc53998a1dbfe0d2d735c46f52cd
parent836dae5d0098ddb097468d5214919b122a301fc1 (diff)
downloadlinux-78cfbf0bbf6e085fd71e156c6147d205fba29f2b.tar.xz
edac, highbank: Moving error injection to sysfs for edac
Always have the error injection i/f available, even if there is no debugfs or EDAC_DEBUG enabled. We need this for testing production kernels and environments. Thus, the entry moves from: /sys/kernel/debug/edac/mc0/inject_ctrl to: /sys/devices/system/edac/mc/mc0/inject_ctrl No other changes of the interface. Signed-off-by: Robert Richter <robert.richter@linaro.org> Signed-off-by: Robert Richter <rric@kernel.org>
-rw-r--r--drivers/edac/highbank_mc_edac.c55
1 files changed, 20 insertions, 35 deletions
diff --git a/drivers/edac/highbank_mc_edac.c b/drivers/edac/highbank_mc_edac.c
index 82211915e3b0..f784de1dc793 100644
--- a/drivers/edac/highbank_mc_edac.c
+++ b/drivers/edac/highbank_mc_edac.c
@@ -95,50 +95,34 @@ static irqreturn_t highbank_mc_err_handler(int irq, void *dev_id)
return IRQ_HANDLED;
}
-#ifdef CONFIG_EDAC_DEBUG
-static ssize_t highbank_mc_err_inject_write(struct file *file,
- const char __user *data,
- size_t count, loff_t *ppos)
+static void highbank_mc_err_inject(struct mem_ctl_info *mci, u8 synd)
{
- struct mem_ctl_info *mci = file->private_data;
struct hb_mc_drvdata *pdata = mci->pvt_info;
- char buf[32];
- size_t buf_size;
u32 reg;
+
+ reg = readl(pdata->mc_err_base + HB_DDR_ECC_OPT);
+ reg &= HB_DDR_ECC_OPT_MODE_MASK;
+ reg |= (synd << HB_DDR_ECC_OPT_XOR_SHIFT) | HB_DDR_ECC_OPT_FWC;
+ writel(reg, pdata->mc_err_base + HB_DDR_ECC_OPT);
+}
+
+#define to_mci(k) container_of(k, struct mem_ctl_info, dev)
+
+static ssize_t highbank_mc_inject_ctrl(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ struct mem_ctl_info *mci = to_mci(dev);
u8 synd;
- buf_size = min(count, (sizeof(buf)-1));
- if (copy_from_user(buf, data, buf_size))
- return -EFAULT;
- buf[buf_size] = 0;
+ if (kstrtou8(buf, 16, &synd))
+ return -EINVAL;
- if (!kstrtou8(buf, 16, &synd)) {
- reg = readl(pdata->mc_err_base + HB_DDR_ECC_OPT);
- reg &= HB_DDR_ECC_OPT_MODE_MASK;
- reg |= (synd << HB_DDR_ECC_OPT_XOR_SHIFT) | HB_DDR_ECC_OPT_FWC;
- writel(reg, pdata->mc_err_base + HB_DDR_ECC_OPT);
- }
+ highbank_mc_err_inject(mci, synd);
return count;
}
-static const struct file_operations highbank_mc_debug_inject_fops = {
- .open = simple_open,
- .write = highbank_mc_err_inject_write,
- .llseek = generic_file_llseek,
-};
-
-static void highbank_mc_create_debugfs_nodes(struct mem_ctl_info *mci)
-{
- if (mci->debugfs)
- debugfs_create_file("inject_ctrl", S_IWUSR, mci->debugfs, mci,
- &highbank_mc_debug_inject_fops);
-;
-}
-#else
-static void highbank_mc_create_debugfs_nodes(struct mem_ctl_info *mci)
-{}
-#endif
+static DEVICE_ATTR(inject_ctrl, S_IWUSR, NULL, highbank_mc_inject_ctrl);
struct hb_mc_settings {
int err_offset;
@@ -259,7 +243,7 @@ static int highbank_mc_probe(struct platform_device *pdev)
goto err2;
}
- highbank_mc_create_debugfs_nodes(mci);
+ device_create_file(&mci->dev, &dev_attr_inject_ctrl);
devres_close_group(&pdev->dev, NULL);
return 0;
@@ -275,6 +259,7 @@ static int highbank_mc_remove(struct platform_device *pdev)
{
struct mem_ctl_info *mci = platform_get_drvdata(pdev);
+ device_remove_file(&mci->dev, &dev_attr_inject_ctrl);
edac_mc_del_mc(&pdev->dev);
edac_mc_free(mci);
return 0;