mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-26 21:54:11 +08:00
EDAC, aspeed: Add an Aspeed AST2500 EDAC driver
Add support for the Aspeed AST2500 SoC. Signed-off-by: Stefan M Schaeckeler <sschaeck@cisco.com> Signed-off-by: Borislav Petkov <bp@suse.de> Cc: Andrew Jeffery <andrew@aj.id.au> Cc: Joel Stanley <joel@jms.id.au> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Mauro Carvalho Chehab <mchehab@kernel.org> Cc: Rob Herring <robh+dt@kernel.org> Cc: devicetree@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-aspeed@lists.ozlabs.org Cc: linux-edac <linux-edac@vger.kernel.org> Link: https://lkml.kernel.org/r/1547743097-5236-2-git-send-email-schaecsn@gmx.net
This commit is contained in:
Stefan M Schaeckeler
Borislav Petkov
parent
bfeffd1552
commit
9b7e6242ee
@ -5396,6 +5396,12 @@ L: linux-edac@vger.kernel.org
|
||||
S: Maintained
|
||||
F: drivers/edac/amd64_edac*
|
||||
|
||||
EDAC-AST2500
|
||||
M: Stefan Schaeckeler <sschaeck@cisco.com>
|
||||
S: Supported
|
||||
F: drivers/edac/aspeed_edac.c
|
||||
F: Documentation/devicetree/bindings/edac/aspeed-sdram-edac.txt
|
||||
|
||||
EDAC-CALXEDA
|
||||
M: Robert Richter <rric@kernel.org>
|
||||
L: linux-edac@vger.kernel.org
|
||||
|
||||
@ -47,6 +47,13 @@
|
||||
reg = <0x80000000 0>;
|
||||
};
|
||||
|
||||
edac: sdram@1e6e0000 {
|
||||
compatible = "aspeed,ast2500-sdram-edac";
|
||||
reg = <0x1e6e0000 0x174>;
|
||||
interrupts = <0>;
|
||||
status = "disabled";
|
||||
};
|
||||
|
||||
ahb {
|
||||
compatible = "simple-bus";
|
||||
#address-cells = <1>;
|
||||
|
||||
@ -475,4 +475,13 @@ config EDAC_QCOM
|
||||
For debugging issues having to do with stability and overall system
|
||||
health, you should probably say 'Y' here.
|
||||
|
||||
config EDAC_ASPEED
|
||||
tristate "Aspeed AST 2500 SoC"
|
||||
depends on MACH_ASPEED_G5
|
||||
help
|
||||
Support for error detection and correction on the Aspeed AST 2500 SoC.
|
||||
|
||||
First, ECC must be configured in the bootloader. Then, this driver
|
||||
will expose error counters via the EDAC kernel framework.
|
||||
|
||||
endif # EDAC
|
||||
|
||||
@ -78,3 +78,4 @@ obj-$(CONFIG_EDAC_SYNOPSYS) += synopsys_edac.o
|
||||
obj-$(CONFIG_EDAC_XGENE) += xgene_edac.o
|
||||
obj-$(CONFIG_EDAC_TI) += ti_edac.o
|
||||
obj-$(CONFIG_EDAC_QCOM) += qcom_edac.o
|
||||
obj-$(CONFIG_EDAC_ASPEED) += aspeed_edac.o
|
||||
|
||||
421
drivers/edac/aspeed_edac.c
Normal file
421
drivers/edac/aspeed_edac.c
Normal file
@ -0,0 +1,421 @@
|
||||
// SPDX-License-Identifier: GPL-2.0+
|
||||
/*
|
||||
* Copyright 2018, 2019 Cisco Systems
|
||||
*/
|
||||
|
||||
#include <linux/edac.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/stop_machine.h>
|
||||
#include <linux/io.h>
|
||||
#include <linux/of_address.h>
|
||||
#include <linux/regmap.h>
|
||||
#include "edac_module.h"
|
||||
|
||||
|
||||
#define DRV_NAME "aspeed-edac"
|
||||
|
||||
|
||||
#define ASPEED_MCR_PROT 0x00 /* protection key register */
|
||||
#define ASPEED_MCR_CONF 0x04 /* configuration register */
|
||||
#define ASPEED_MCR_INTR_CTRL 0x50 /* interrupt control/status register */
|
||||
#define ASPEED_MCR_ADDR_UNREC 0x58 /* address of first un-recoverable error */
|
||||
#define ASPEED_MCR_ADDR_REC 0x5c /* address of last recoverable error */
|
||||
#define ASPEED_MCR_LAST ASPEED_MCR_ADDR_REC
|
||||
|
||||
|
||||
#define ASPEED_MCR_PROT_PASSWD 0xfc600309
|
||||
#define ASPEED_MCR_CONF_DRAM_TYPE BIT(4)
|
||||
#define ASPEED_MCR_CONF_ECC BIT(7)
|
||||
#define ASPEED_MCR_INTR_CTRL_CLEAR BIT(31)
|
||||
#define ASPEED_MCR_INTR_CTRL_CNT_REC GENMASK(23, 16)
|
||||
#define ASPEED_MCR_INTR_CTRL_CNT_UNREC GENMASK(15, 12)
|
||||
#define ASPEED_MCR_INTR_CTRL_ENABLE (BIT(0) | BIT(1))
|
||||
|
||||
|
||||
static struct regmap *aspeed_regmap;
|
||||
|
||||
|
||||
static int regmap_reg_write(void *context, unsigned int reg, unsigned int val)
|
||||
{
|
||||
void __iomem *regs = (void __iomem *)context;
|
||||
|
||||
/* enable write to MCR register set */
|
||||
writel(ASPEED_MCR_PROT_PASSWD, regs + ASPEED_MCR_PROT);
|
||||
|
||||
writel(val, regs + reg);
|
||||
|
||||
/* disable write to MCR register set */
|
||||
writel(~ASPEED_MCR_PROT_PASSWD, regs + ASPEED_MCR_PROT);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static int regmap_reg_read(void *context, unsigned int reg, unsigned int *val)
|
||||
{
|
||||
void __iomem *regs = (void __iomem *)context;
|
||||
|
||||
*val = readl(regs + reg);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static bool regmap_is_volatile(struct device *dev, unsigned int reg)
|
||||
{
|
||||
switch (reg) {
|
||||
case ASPEED_MCR_PROT:
|
||||
case ASPEED_MCR_INTR_CTRL:
|
||||
case ASPEED_MCR_ADDR_UNREC:
|
||||
case ASPEED_MCR_ADDR_REC:
|
||||
return true;
|
||||
default:
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static const struct regmap_config aspeed_regmap_config = {
|
||||
.reg_bits = 32,
|
||||
.val_bits = 32,
|
||||
.reg_stride = 4,
|
||||
.max_register = ASPEED_MCR_LAST,
|
||||
.reg_write = regmap_reg_write,
|
||||
.reg_read = regmap_reg_read,
|
||||
.volatile_reg = regmap_is_volatile,
|
||||
.fast_io = true,
|
||||
};
|
||||
|
||||
|
||||
static void count_rec(struct mem_ctl_info *mci, u8 rec_cnt, u32 rec_addr)
|
||||
{
|
||||
struct csrow_info *csrow = mci->csrows[0];
|
||||
u32 page, offset, syndrome;
|
||||
|
||||
if (!rec_cnt)
|
||||
return;
|
||||
|
||||
/* report first few errors (if there are) */
|
||||
/* note: no addresses are recorded */
|
||||
if (rec_cnt > 1) {
|
||||
/* page, offset and syndrome are not available */
|
||||
page = 0;
|
||||
offset = 0;
|
||||
syndrome = 0;
|
||||
edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, rec_cnt-1,
|
||||
page, offset, syndrome, 0, 0, -1,
|
||||
"address(es) not available", "");
|
||||
}
|
||||
|
||||
/* report last error */
|
||||
/* note: rec_addr is the last recoverable error addr */
|
||||
page = rec_addr >> PAGE_SHIFT;
|
||||
offset = rec_addr & ~PAGE_MASK;
|
||||
/* syndrome is not available */
|
||||
syndrome = 0;
|
||||
edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, 1,
|
||||
csrow->first_page + page, offset, syndrome,
|
||||
0, 0, -1, "", "");
|
||||
}
|
||||
|
||||
|
||||
static void count_un_rec(struct mem_ctl_info *mci, u8 un_rec_cnt,
|
||||
u32 un_rec_addr)
|
||||
{
|
||||
struct csrow_info *csrow = mci->csrows[0];
|
||||
u32 page, offset, syndrome;
|
||||
|
||||
if (!un_rec_cnt)
|
||||
return;
|
||||
|
||||
/* report 1. error */
|
||||
/* note: un_rec_addr is the first unrecoverable error addr */
|
||||
page = un_rec_addr >> PAGE_SHIFT;
|
||||
offset = un_rec_addr & ~PAGE_MASK;
|
||||
/* syndrome is not available */
|
||||
syndrome = 0;
|
||||
edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1,
|
||||
csrow->first_page + page, offset, syndrome,
|
||||
0, 0, -1, "", "");
|
||||
|
||||
/* report further errors (if there are) */
|
||||
/* note: no addresses are recorded */
|
||||
if (un_rec_cnt > 1) {
|
||||
/* page, offset and syndrome are not available */
|
||||
page = 0;
|
||||
offset = 0;
|
||||
syndrome = 0;
|
||||
edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, un_rec_cnt-1,
|
||||
page, offset, syndrome, 0, 0, -1,
|
||||
"address(es) not available", "");
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static irqreturn_t mcr_isr(int irq, void *arg)
|
||||
{
|
||||
struct mem_ctl_info *mci = arg;
|
||||
u32 rec_addr, un_rec_addr;
|
||||
u32 reg50, reg5c, reg58;
|
||||
u8 rec_cnt, un_rec_cnt;
|
||||
|
||||
regmap_read(aspeed_regmap, ASPEED_MCR_INTR_CTRL, ®50);
|
||||
dev_dbg(mci->pdev, "received edac interrupt w/ mcr register 50: 0x%x\n",
|
||||
reg50);
|
||||
|
||||
/* collect data about recoverable and unrecoverable errors */
|
||||
rec_cnt = (reg50 & ASPEED_MCR_INTR_CTRL_CNT_REC) >> 16;
|
||||
un_rec_cnt = (reg50 & ASPEED_MCR_INTR_CTRL_CNT_UNREC) >> 12;
|
||||
|
||||
dev_dbg(mci->pdev, "%d recoverable interrupts and %d unrecoverable interrupts\n",
|
||||
rec_cnt, un_rec_cnt);
|
||||
|
||||
regmap_read(aspeed_regmap, ASPEED_MCR_ADDR_UNREC, ®58);
|
||||
un_rec_addr = reg58;
|
||||
|
||||
regmap_read(aspeed_regmap, ASPEED_MCR_ADDR_REC, ®5c);
|
||||
rec_addr = reg5c;
|
||||
|
||||
/* clear interrupt flags and error counters: */
|
||||
regmap_update_bits(aspeed_regmap, ASPEED_MCR_INTR_CTRL,
|
||||
ASPEED_MCR_INTR_CTRL_CLEAR,
|
||||
ASPEED_MCR_INTR_CTRL_CLEAR);
|
||||
|
||||
regmap_update_bits(aspeed_regmap, ASPEED_MCR_INTR_CTRL,
|
||||
ASPEED_MCR_INTR_CTRL_CLEAR, 0);
|
||||
|
||||
/* process recoverable and unrecoverable errors */
|
||||
count_rec(mci, rec_cnt, rec_addr);
|
||||
count_un_rec(mci, un_rec_cnt, un_rec_addr);
|
||||
|
||||
if (!rec_cnt && !un_rec_cnt)
|
||||
dev_dbg(mci->pdev, "received edac interrupt, but did not find any ECC counters\n");
|
||||
|
||||
regmap_read(aspeed_regmap, ASPEED_MCR_INTR_CTRL, ®50);
|
||||
dev_dbg(mci->pdev, "edac interrupt handled. mcr reg 50 is now: 0x%x\n",
|
||||
reg50);
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
|
||||
static int config_irq(void *ctx, struct platform_device *pdev)
|
||||
{
|
||||
int irq;
|
||||
int rc;
|
||||
|
||||
/* register interrupt handler */
|
||||
irq = platform_get_irq(pdev, 0);
|
||||
dev_dbg(&pdev->dev, "got irq %d\n", irq);
|
||||
if (!irq)
|
||||
return -ENODEV;
|
||||
|
||||
rc = devm_request_irq(&pdev->dev, irq, mcr_isr, IRQF_TRIGGER_HIGH,
|
||||
DRV_NAME, ctx);
|
||||
if (rc) {
|
||||
dev_err(&pdev->dev, "unable to request irq %d\n", irq);
|
||||
return rc;
|
||||
}
|
||||
|
||||
/* enable interrupts */
|
||||
regmap_update_bits(aspeed_regmap, ASPEED_MCR_INTR_CTRL,
|
||||
ASPEED_MCR_INTR_CTRL_ENABLE,
|
||||
ASPEED_MCR_INTR_CTRL_ENABLE);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static int init_csrows(struct mem_ctl_info *mci)
|
||||
{
|
||||
struct csrow_info *csrow = mci->csrows[0];
|
||||
u32 nr_pages, dram_type;
|
||||
struct dimm_info *dimm;
|
||||
struct device_node *np;
|
||||
struct resource r;
|
||||
u32 reg04;
|
||||
int rc;
|
||||
|
||||
/* retrieve info about physical memory from device tree */
|
||||
np = of_find_node_by_path("/memory");
|
||||
if (!np) {
|
||||
dev_err(mci->pdev, "dt: missing /memory node\n");
|
||||
return -ENODEV;
|
||||
};
|
||||
|
||||
rc = of_address_to_resource(np, 0, &r);
|
||||
|
||||
of_node_put(np);
|
||||
|
||||
if (rc) {
|
||||
dev_err(mci->pdev, "dt: failed requesting resource for /memory node\n");
|
||||
return rc;
|
||||
};
|
||||
|
||||
dev_dbg(mci->pdev, "dt: /memory node resources: first page r.start=0x%x, resource_size=0x%x, PAGE_SHIFT macro=0x%x\n",
|
||||
r.start, resource_size(&r), PAGE_SHIFT);
|
||||
|
||||
csrow->first_page = r.start >> PAGE_SHIFT;
|
||||
nr_pages = resource_size(&r) >> PAGE_SHIFT;
|
||||
csrow->last_page = csrow->first_page + nr_pages - 1;
|
||||
|
||||
regmap_read(aspeed_regmap, ASPEED_MCR_CONF, ®04);
|
||||
dram_type = (reg04 & ASPEED_MCR_CONF_DRAM_TYPE) ? MEM_DDR4 : MEM_DDR3;
|
||||
|
||||
dimm = csrow->channels[0]->dimm;
|
||||
dimm->mtype = dram_type;
|
||||
dimm->edac_mode = EDAC_SECDED;
|
||||
dimm->nr_pages = nr_pages / csrow->nr_channels;
|
||||
|
||||
dev_dbg(mci->pdev, "initialized dimm with first_page=0x%lx and nr_pages=0x%x\n",
|
||||
csrow->first_page, nr_pages);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static int aspeed_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct device *dev = &pdev->dev;
|
||||
struct edac_mc_layer layers[2];
|
||||
struct mem_ctl_info *mci;
|
||||
struct device_node *np;
|
||||
struct resource *res;
|
||||
void __iomem *regs;
|
||||
u32 reg04;
|
||||
int rc;
|
||||
|
||||
/* setup regmap */
|
||||
np = dev->of_node;
|
||||
|
||||
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||||
if (!res)
|
||||
return -ENOENT;
|
||||
|
||||
regs = devm_ioremap_resource(dev, res);
|
||||
if (IS_ERR(regs))
|
||||
return PTR_ERR(regs);
|
||||
|
||||
aspeed_regmap = devm_regmap_init(dev, NULL, (__force void *)regs,
|
||||
&aspeed_regmap_config);
|
||||
if (IS_ERR(aspeed_regmap))
|
||||
return PTR_ERR(aspeed_regmap);
|
||||
|
||||
/* bail out if ECC mode is not configured */
|
||||
regmap_read(aspeed_regmap, ASPEED_MCR_CONF, ®04);
|
||||
if (!(reg04 & ASPEED_MCR_CONF_ECC)) {
|
||||
dev_err(&pdev->dev, "ECC mode is not configured in u-boot\n");
|
||||
return -EPERM;
|
||||
}
|
||||
|
||||
edac_op_state = EDAC_OPSTATE_INT;
|
||||
|
||||
/* allocate & init EDAC MC data structure */
|
||||
layers[0].type = EDAC_MC_LAYER_CHIP_SELECT;
|
||||
layers[0].size = 1;
|
||||
layers[0].is_virt_csrow = true;
|
||||
layers[1].type = EDAC_MC_LAYER_CHANNEL;
|
||||
layers[1].size = 1;
|
||||
layers[1].is_virt_csrow = false;
|
||||
|
||||
mci = edac_mc_alloc(0, ARRAY_SIZE(layers), layers, 0);
|
||||
if (!mci)
|
||||
return -ENOMEM;
|
||||
|
||||
mci->pdev = &pdev->dev;
|
||||
mci->mtype_cap = MEM_FLAG_DDR3 | MEM_FLAG_DDR4;
|
||||
mci->edac_ctl_cap = EDAC_FLAG_SECDED;
|
||||
mci->edac_cap = EDAC_FLAG_SECDED;
|
||||
mci->scrub_cap = SCRUB_FLAG_HW_SRC;
|
||||
mci->scrub_mode = SCRUB_HW_SRC;
|
||||
mci->mod_name = DRV_NAME;
|
||||
mci->ctl_name = "MIC";
|
||||
mci->dev_name = dev_name(&pdev->dev);
|
||||
|
||||
rc = init_csrows(mci);
|
||||
if (rc) {
|
||||
dev_err(&pdev->dev, "failed to init csrows\n");
|
||||
goto probe_exit02;
|
||||
}
|
||||
|
||||
platform_set_drvdata(pdev, mci);
|
||||
|
||||
/* register with edac core */
|
||||
rc = edac_mc_add_mc(mci);
|
||||
if (rc) {
|
||||
dev_err(&pdev->dev, "failed to register with EDAC core\n");
|
||||
goto probe_exit02;
|
||||
}
|
||||
|
||||
/* register interrupt handler and enable interrupts */
|
||||
rc = config_irq(mci, pdev);
|
||||
if (rc) {
|
||||
dev_err(&pdev->dev, "failed setting up irq\n");
|
||||
goto probe_exit01;
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
probe_exit01:
|
||||
edac_mc_del_mc(&pdev->dev);
|
||||
probe_exit02:
|
||||
edac_mc_free(mci);
|
||||
return rc;
|
||||
}
|
||||
|
||||
|
||||
static int aspeed_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct mem_ctl_info *mci;
|
||||
|
||||
/* disable interrupts */
|
||||
regmap_update_bits(aspeed_regmap, ASPEED_MCR_INTR_CTRL,
|
||||
ASPEED_MCR_INTR_CTRL_ENABLE, 0);
|
||||
|
||||
/* free resources */
|
||||
mci = edac_mc_del_mc(&pdev->dev);
|
||||
if (mci)
|
||||
edac_mc_free(mci);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static const struct of_device_id aspeed_of_match[] = {
|
||||
{ .compatible = "aspeed,ast2500-sdram-edac" },
|
||||
{},
|
||||
};
|
||||
|
||||
|
||||
static struct platform_driver aspeed_driver = {
|
||||
.driver = {
|
||||
.name = DRV_NAME,
|
||||
.of_match_table = aspeed_of_match
|
||||
},
|
||||
.probe = aspeed_probe,
|
||||
.remove = aspeed_remove
|
||||
};
|
||||
|
||||
|
||||
static int __init aspeed_init(void)
|
||||
{
|
||||
return platform_driver_register(&aspeed_driver);
|
||||
}
|
||||
|
||||
|
||||
static void __exit aspeed_exit(void)
|
||||
{
|
||||
platform_driver_unregister(&aspeed_driver);
|
||||
}
|
||||
|
||||
|
||||
module_init(aspeed_init);
|
||||
module_exit(aspeed_exit);
|
||||
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_AUTHOR("Stefan Schaeckeler <sschaeck@cisco.com>");
|
||||
MODULE_DESCRIPTION("Aspeed AST2500 EDAC driver");
|
||||
MODULE_VERSION("1.0");
|
||||
Loading…
Reference in New Issue
Block a user