269 lines
6.2 KiB
C
269 lines
6.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* CoreNet Coherency Fabric error reporting
|
|
*
|
|
* Copyright 2014 Freescale Semiconductor Inc.
|
|
*/
|
|
|
|
#include <linux/interrupt.h>
|
|
#include <linux/io.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/module.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_address.h>
|
|
#include <linux/of_device.h>
|
|
#include <linux/of_irq.h>
|
|
#include <linux/platform_device.h>
|
|
|
|
enum ccf_version {
|
|
CCF1,
|
|
CCF2,
|
|
};
|
|
|
|
struct ccf_info {
|
|
enum ccf_version version;
|
|
int err_reg_offs;
|
|
bool has_brr;
|
|
};
|
|
|
|
static const struct ccf_info ccf1_info = {
|
|
.version = CCF1,
|
|
.err_reg_offs = 0xa00,
|
|
.has_brr = false,
|
|
};
|
|
|
|
static const struct ccf_info ccf2_info = {
|
|
.version = CCF2,
|
|
.err_reg_offs = 0xe40,
|
|
.has_brr = true,
|
|
};
|
|
|
|
/*
|
|
* This register is present but not documented, with different values for
|
|
* IP_ID, on other chips with fsl,corenet2-cf such as t4240 and b4860.
|
|
*/
|
|
#define CCF_BRR 0xbf8
|
|
#define CCF_BRR_IPID 0xffff0000
|
|
#define CCF_BRR_IPID_T1040 0x09310000
|
|
|
|
static const struct of_device_id ccf_matches[] = {
|
|
{
|
|
.compatible = "fsl,corenet1-cf",
|
|
.data = &ccf1_info,
|
|
},
|
|
{
|
|
.compatible = "fsl,corenet2-cf",
|
|
.data = &ccf2_info,
|
|
},
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(of, ccf_matches);
|
|
|
|
struct ccf_err_regs {
|
|
u32 errdet; /* 0x00 Error Detect Register */
|
|
/* 0x04 Error Enable (ccf1)/Disable (ccf2) Register */
|
|
u32 errdis;
|
|
/* 0x08 Error Interrupt Enable Register (ccf2 only) */
|
|
u32 errinten;
|
|
u32 cecar; /* 0x0c Error Capture Attribute Register */
|
|
u32 cecaddrh; /* 0x10 Error Capture Address High */
|
|
u32 cecaddrl; /* 0x14 Error Capture Address Low */
|
|
u32 cecar2; /* 0x18 Error Capture Attribute Register 2 */
|
|
};
|
|
|
|
/* LAE/CV also valid for errdis and errinten */
|
|
#define ERRDET_LAE (1 << 0) /* Local Access Error */
|
|
#define ERRDET_CV (1 << 1) /* Coherency Violation */
|
|
#define ERRDET_UTID (1 << 2) /* Unavailable Target ID (t1040) */
|
|
#define ERRDET_MCST (1 << 3) /* Multicast Stash (t1040) */
|
|
#define ERRDET_CTYPE_SHIFT 26 /* Capture Type (ccf2 only) */
|
|
#define ERRDET_CTYPE_MASK (0x1f << ERRDET_CTYPE_SHIFT)
|
|
#define ERRDET_CAP (1 << 31) /* Capture Valid (ccf2 only) */
|
|
|
|
#define CECAR_VAL (1 << 0) /* Valid (ccf1 only) */
|
|
#define CECAR_UVT (1 << 15) /* Unavailable target ID (ccf1) */
|
|
#define CECAR_SRCID_SHIFT_CCF1 24
|
|
#define CECAR_SRCID_MASK_CCF1 (0xff << CECAR_SRCID_SHIFT_CCF1)
|
|
#define CECAR_SRCID_SHIFT_CCF2 18
|
|
#define CECAR_SRCID_MASK_CCF2 (0xff << CECAR_SRCID_SHIFT_CCF2)
|
|
|
|
#define CECADDRH_ADDRH 0xff
|
|
|
|
struct ccf_private {
|
|
const struct ccf_info *info;
|
|
struct device *dev;
|
|
void __iomem *regs;
|
|
struct ccf_err_regs __iomem *err_regs;
|
|
bool t1040;
|
|
};
|
|
|
|
static irqreturn_t ccf_irq(int irq, void *dev_id)
|
|
{
|
|
struct ccf_private *ccf = dev_id;
|
|
static DEFINE_RATELIMIT_STATE(ratelimit, DEFAULT_RATELIMIT_INTERVAL,
|
|
DEFAULT_RATELIMIT_BURST);
|
|
u32 errdet, cecar, cecar2;
|
|
u64 addr;
|
|
u32 src_id;
|
|
bool uvt = false;
|
|
bool cap_valid = false;
|
|
|
|
errdet = ioread32be(&ccf->err_regs->errdet);
|
|
cecar = ioread32be(&ccf->err_regs->cecar);
|
|
cecar2 = ioread32be(&ccf->err_regs->cecar2);
|
|
addr = ioread32be(&ccf->err_regs->cecaddrl);
|
|
addr |= ((u64)(ioread32be(&ccf->err_regs->cecaddrh) &
|
|
CECADDRH_ADDRH)) << 32;
|
|
|
|
if (!__ratelimit(&ratelimit))
|
|
goto out;
|
|
|
|
switch (ccf->info->version) {
|
|
case CCF1:
|
|
if (cecar & CECAR_VAL) {
|
|
if (cecar & CECAR_UVT)
|
|
uvt = true;
|
|
|
|
src_id = (cecar & CECAR_SRCID_MASK_CCF1) >>
|
|
CECAR_SRCID_SHIFT_CCF1;
|
|
cap_valid = true;
|
|
}
|
|
|
|
break;
|
|
case CCF2:
|
|
if (errdet & ERRDET_CAP) {
|
|
src_id = (cecar & CECAR_SRCID_MASK_CCF2) >>
|
|
CECAR_SRCID_SHIFT_CCF2;
|
|
cap_valid = true;
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
dev_crit(ccf->dev, "errdet 0x%08x cecar 0x%08x cecar2 0x%08x\n",
|
|
errdet, cecar, cecar2);
|
|
|
|
if (errdet & ERRDET_LAE) {
|
|
if (uvt)
|
|
dev_crit(ccf->dev, "LAW Unavailable Target ID\n");
|
|
else
|
|
dev_crit(ccf->dev, "Local Access Window Error\n");
|
|
}
|
|
|
|
if (errdet & ERRDET_CV)
|
|
dev_crit(ccf->dev, "Coherency Violation\n");
|
|
|
|
if (errdet & ERRDET_UTID)
|
|
dev_crit(ccf->dev, "Unavailable Target ID\n");
|
|
|
|
if (errdet & ERRDET_MCST)
|
|
dev_crit(ccf->dev, "Multicast Stash\n");
|
|
|
|
if (cap_valid) {
|
|
dev_crit(ccf->dev, "address 0x%09llx, src id 0x%x\n",
|
|
addr, src_id);
|
|
}
|
|
|
|
out:
|
|
iowrite32be(errdet, &ccf->err_regs->errdet);
|
|
return errdet ? IRQ_HANDLED : IRQ_NONE;
|
|
}
|
|
|
|
static int ccf_probe(struct platform_device *pdev)
|
|
{
|
|
struct ccf_private *ccf;
|
|
const struct of_device_id *match;
|
|
u32 errinten;
|
|
int ret, irq;
|
|
|
|
match = of_match_device(ccf_matches, &pdev->dev);
|
|
if (WARN_ON(!match))
|
|
return -ENODEV;
|
|
|
|
ccf = devm_kzalloc(&pdev->dev, sizeof(*ccf), GFP_KERNEL);
|
|
if (!ccf)
|
|
return -ENOMEM;
|
|
|
|
ccf->regs = devm_platform_ioremap_resource(pdev, 0);
|
|
if (IS_ERR(ccf->regs))
|
|
return PTR_ERR(ccf->regs);
|
|
|
|
ccf->dev = &pdev->dev;
|
|
ccf->info = match->data;
|
|
ccf->err_regs = ccf->regs + ccf->info->err_reg_offs;
|
|
|
|
if (ccf->info->has_brr) {
|
|
u32 brr = ioread32be(ccf->regs + CCF_BRR);
|
|
|
|
if ((brr & CCF_BRR_IPID) == CCF_BRR_IPID_T1040)
|
|
ccf->t1040 = true;
|
|
}
|
|
|
|
dev_set_drvdata(&pdev->dev, ccf);
|
|
|
|
irq = platform_get_irq(pdev, 0);
|
|
if (irq < 0)
|
|
return irq;
|
|
|
|
ret = devm_request_irq(&pdev->dev, irq, ccf_irq, 0, pdev->name, ccf);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "%s: can't request irq\n", __func__);
|
|
return ret;
|
|
}
|
|
|
|
errinten = ERRDET_LAE | ERRDET_CV;
|
|
if (ccf->t1040)
|
|
errinten |= ERRDET_UTID | ERRDET_MCST;
|
|
|
|
switch (ccf->info->version) {
|
|
case CCF1:
|
|
/* On CCF1 this register enables rather than disables. */
|
|
iowrite32be(errinten, &ccf->err_regs->errdis);
|
|
break;
|
|
|
|
case CCF2:
|
|
iowrite32be(0, &ccf->err_regs->errdis);
|
|
iowrite32be(errinten, &ccf->err_regs->errinten);
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ccf_remove(struct platform_device *pdev)
|
|
{
|
|
struct ccf_private *ccf = dev_get_drvdata(&pdev->dev);
|
|
|
|
switch (ccf->info->version) {
|
|
case CCF1:
|
|
iowrite32be(0, &ccf->err_regs->errdis);
|
|
break;
|
|
|
|
case CCF2:
|
|
/*
|
|
* We clear errdis on ccf1 because that's the only way to
|
|
* disable interrupts, but on ccf2 there's no need to disable
|
|
* detection.
|
|
*/
|
|
iowrite32be(0, &ccf->err_regs->errinten);
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver ccf_driver = {
|
|
.driver = {
|
|
.name = KBUILD_MODNAME,
|
|
.of_match_table = ccf_matches,
|
|
},
|
|
.probe = ccf_probe,
|
|
.remove = ccf_remove,
|
|
};
|
|
|
|
module_platform_driver(ccf_driver);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Freescale Semiconductor");
|
|
MODULE_DESCRIPTION("Freescale CoreNet Coherency Fabric error reporting");
|