EDAC/amd64: Merge error injection sysfs facilities

Merge them into the main driver and put them inside an EDAC_DEBUG
ifdeffery to simplify the driver and have all debugging/injection stuff
behind a debug build-time switch.

No functional changes.

Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Yazen Ghannam <yazen.ghannam@amd.com>
Link: https://lkml.kernel.org/r/20201215110517.5215-2-bp@alien8.de

1 files changed, 0 insertions, 235 deletions

diff --git a/drivers/edac/amd64_edac_inj.c b/drivers/edac/amd64_edac_inj.c
deleted file mode 100644
index d96d6116f0fb..000000000000
--- a/drivers/edac/amd64_edac_inj.c
+++ /dev/null
@@ -1,235 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-#include "amd64_edac.h"
-
-static ssize_t amd64_inject_section_show(struct device *dev,
-					 struct device_attribute *mattr,
-					 char *buf)
-{
-	struct mem_ctl_info *mci = to_mci(dev);
-	struct amd64_pvt *pvt = mci->pvt_info;
-	return sprintf(buf, "0x%x\n", pvt->injection.section);
-}
-
-/*
- * store error injection section value which refers to one of 4 16-byte sections
- * within a 64-byte cacheline
- *
- * range: 0..3
- */
-static ssize_t amd64_inject_section_store(struct device *dev,
-					  struct device_attribute *mattr,
-					  const char *data, size_t count)
-{
-	struct mem_ctl_info *mci = to_mci(dev);
-	struct amd64_pvt *pvt = mci->pvt_info;
-	unsigned long value;
-	int ret;
-
-	ret = kstrtoul(data, 10, &value);
-	if (ret < 0)
-		return ret;
-
-	if (value > 3) {
-		amd64_warn("%s: invalid section 0x%lx\n", __func__, value);
-		return -EINVAL;
-	}
-
-	pvt->injection.section = (u32) value;
-	return count;
-}
-
-static ssize_t amd64_inject_word_show(struct device *dev,
-					struct device_attribute *mattr,
-					char *buf)
-{
-	struct mem_ctl_info *mci = to_mci(dev);
-	struct amd64_pvt *pvt = mci->pvt_info;
-	return sprintf(buf, "0x%x\n", pvt->injection.word);
-}
-
-/*
- * store error injection word value which refers to one of 9 16-bit word of the
- * 16-byte (128-bit + ECC bits) section
- *
- * range: 0..8
- */
-static ssize_t amd64_inject_word_store(struct device *dev,
-				       struct device_attribute *mattr,
-				       const char *data, size_t count)
-{
-	struct mem_ctl_info *mci = to_mci(dev);
-	struct amd64_pvt *pvt = mci->pvt_info;
-	unsigned long value;
-	int ret;
-
-	ret = kstrtoul(data, 10, &value);
-	if (ret < 0)
-		return ret;
-
-	if (value > 8) {
-		amd64_warn("%s: invalid word 0x%lx\n", __func__, value);
-		return -EINVAL;
-	}
-
-	pvt->injection.word = (u32) value;
-	return count;
-}
-
-static ssize_t amd64_inject_ecc_vector_show(struct device *dev,
-					    struct device_attribute *mattr,
-					    char *buf)
-{
-	struct mem_ctl_info *mci = to_mci(dev);
-	struct amd64_pvt *pvt = mci->pvt_info;
-	return sprintf(buf, "0x%x\n", pvt->injection.bit_map);
-}
-
-/*
- * store 16 bit error injection vector which enables injecting errors to the
- * corresponding bit within the error injection word above. When used during a
- * DRAM ECC read, it holds the contents of the of the DRAM ECC bits.
- */
-static ssize_t amd64_inject_ecc_vector_store(struct device *dev,
-				       struct device_attribute *mattr,
-				       const char *data, size_t count)
-{
-	struct mem_ctl_info *mci = to_mci(dev);
-	struct amd64_pvt *pvt = mci->pvt_info;
-	unsigned long value;
-	int ret;
-
-	ret = kstrtoul(data, 16, &value);
-	if (ret < 0)
-		return ret;
-
-	if (value & 0xFFFF0000) {
-		amd64_warn("%s: invalid EccVector: 0x%lx\n", __func__, value);
-		return -EINVAL;
-	}
-
-	pvt->injection.bit_map = (u32) value;
-	return count;
-}
-
-/*
- * Do a DRAM ECC read. Assemble staged values in the pvt area, format into
- * fields needed by the injection registers and read the NB Array Data Port.
- */
-static ssize_t amd64_inject_read_store(struct device *dev,
-				       struct device_attribute *mattr,
-				       const char *data, size_t count)
-{
-	struct mem_ctl_info *mci = to_mci(dev);
-	struct amd64_pvt *pvt = mci->pvt_info;
-	unsigned long value;
-	u32 section, word_bits;
-	int ret;
-
-	ret = kstrtoul(data, 10, &value);
-	if (ret < 0)
-		return ret;
-
-	/* Form value to choose 16-byte section of cacheline */
-	section = F10_NB_ARRAY_DRAM | SET_NB_ARRAY_ADDR(pvt->injection.section);
-
-	amd64_write_pci_cfg(pvt->F3, F10_NB_ARRAY_ADDR, section);
-
-	word_bits = SET_NB_DRAM_INJECTION_READ(pvt->injection);
-
-	/* Issue 'word' and 'bit' along with the READ request */
-	amd64_write_pci_cfg(pvt->F3, F10_NB_ARRAY_DATA, word_bits);
-
-	edac_dbg(0, "section=0x%x word_bits=0x%x\n", section, word_bits);
-
-	return count;
-}
-
-/*
- * Do a DRAM ECC write. Assemble staged values in the pvt area and format into
- * fields needed by the injection registers.
- */
-static ssize_t amd64_inject_write_store(struct device *dev,
-					struct device_attribute *mattr,
-					const char *data, size_t count)
-{
-	struct mem_ctl_info *mci = to_mci(dev);
-	struct amd64_pvt *pvt = mci->pvt_info;
-	u32 section, word_bits, tmp;
-	unsigned long value;
-	int ret;
-
-	ret = kstrtoul(data, 10, &value);
-	if (ret < 0)
-		return ret;
-
-	/* Form value to choose 16-byte section of cacheline */
-	section = F10_NB_ARRAY_DRAM | SET_NB_ARRAY_ADDR(pvt->injection.section);
-
-	amd64_write_pci_cfg(pvt->F3, F10_NB_ARRAY_ADDR, section);
-
-	word_bits = SET_NB_DRAM_INJECTION_WRITE(pvt->injection);
-
-	pr_notice_once("Don't forget to decrease MCE polling interval in\n"
-			"/sys/bus/machinecheck/devices/machinecheck<CPUNUM>/check_interval\n"
-			"so that you can get the error report faster.\n");
-
-	on_each_cpu(disable_caches, NULL, 1);
-
-	/* Issue 'word' and 'bit' along with the READ request */
-	amd64_write_pci_cfg(pvt->F3, F10_NB_ARRAY_DATA, word_bits);
-
- retry:
-	/* wait until injection happens */
-	amd64_read_pci_cfg(pvt->F3, F10_NB_ARRAY_DATA, &tmp);
-	if (tmp & F10_NB_ARR_ECC_WR_REQ) {
-		cpu_relax();
-		goto retry;
-	}
-
-	on_each_cpu(enable_caches, NULL, 1);
-
-	edac_dbg(0, "section=0x%x word_bits=0x%x\n", section, word_bits);
-
-	return count;
-}
-
-/*
- * update NUM_INJ_ATTRS in case you add new members
- */
-
-static DEVICE_ATTR(inject_section, S_IRUGO | S_IWUSR,
-		   amd64_inject_section_show, amd64_inject_section_store);
-static DEVICE_ATTR(inject_word, S_IRUGO | S_IWUSR,
-		   amd64_inject_word_show, amd64_inject_word_store);
-static DEVICE_ATTR(inject_ecc_vector, S_IRUGO | S_IWUSR,
-		   amd64_inject_ecc_vector_show, amd64_inject_ecc_vector_store);
-static DEVICE_ATTR(inject_write, S_IWUSR,
-		   NULL, amd64_inject_write_store);
-static DEVICE_ATTR(inject_read,  S_IWUSR,
-		   NULL, amd64_inject_read_store);
-
-static struct attribute *amd64_edac_inj_attrs[] = {
-	&dev_attr_inject_section.attr,
-	&dev_attr_inject_word.attr,
-	&dev_attr_inject_ecc_vector.attr,
-	&dev_attr_inject_write.attr,
-	&dev_attr_inject_read.attr,
-	NULL
-};
-
-static umode_t amd64_edac_inj_is_visible(struct kobject *kobj,
-					 struct attribute *attr, int idx)
-{
-	struct device *dev = kobj_to_dev(kobj);
-	struct mem_ctl_info *mci = container_of(dev, struct mem_ctl_info, dev);
-	struct amd64_pvt *pvt = mci->pvt_info;
-
-	if (pvt->fam < 0x10)
-		return 0;
-	return attr->mode;
-}
-
-const struct attribute_group amd64_edac_inj_group = {
-	.attrs = amd64_edac_inj_attrs,
-	.is_visible = amd64_edac_inj_is_visible,
-};