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OMAP3: l3: Introduce l3-interconnect error handling driver 

The driver provides the information regarding the ocp errors
that gets logged in the interconnect.The error info provides
the details regarding the master or the target that
generated the error, type of error and the corresponding address.
The stack dump is also provided.

Signed-off-by: sricharan <r.sricharan@ti.com>
[r.sricharan@ti.com: Enhacements, major cleanup and made it functional]
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
[santosh.shilimkar@ti.com: Driver design changes as per OMAP4 version]
Signed-off-by: Felipe Balbi <balbi@ti.com>
[balbi@ti.com: Initial version of the driver]
Acked-by: Benoit Cousson <b-cousson@ti.com>
This commit is contained in:
Felipe Balbi 2011-03-07 19:35:20 +05:30 committed by Santosh Shilimkar
parent 0abcf6185e
commit e2fa61d409
3 changed files with 655 additions and 0 deletions
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3
arch/arm/mach-omap2/Makefile
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@ -135,6 +135,9 @@ obj-$(CONFIG_ARCH_OMAP4) += omap_hwmod_44xx_data.o
# EMU peripherals
obj-$(CONFIG_OMAP3_EMU) += emu.o
# L3 interconnect
obj-$(CONFIG_ARCH_OMAP3) += omap_l3_smx.o
obj-$(CONFIG_OMAP_MBOX_FWK) += mailbox_mach.o
mailbox_mach-objs := mailbox.o

314
arch/arm/mach-omap2/omap_l3_smx.c Normal file
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@ -0,0 +1,314 @@
/*
* OMAP3XXX L3 Interconnect Driver
*
* Copyright (C) 2011 Texas Corporation
* Felipe Balbi <balbi@ti.com>
* Santosh Shilimkar <santosh.shilimkar@ti.com>
* Sricharan <r.sricharan@ti.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*/
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include "omap_l3_smx.h"
static inline u64 omap3_l3_readll(void __iomem *base, u16 reg)
{
return __raw_readll(base + reg);
}
static inline void omap3_l3_writell(void __iomem *base, u16 reg, u64 value)
{
__raw_writell(value, base + reg);
}
static inline enum omap3_l3_code omap3_l3_decode_error_code(u64 error)
{
return (error & 0x0f000000) >> L3_ERROR_LOG_CODE;
}
static inline u32 omap3_l3_decode_addr(u64 error_addr)
{
return error_addr & 0xffffffff;
}
static inline unsigned omap3_l3_decode_cmd(u64 error)
{
return (error & 0x07) >> L3_ERROR_LOG_CMD;
}
static inline enum omap3_l3_initiator_id omap3_l3_decode_initid(u64 error)
{
return (error & 0xff00) >> L3_ERROR_LOG_INITID;
}
static inline unsigned omap3_l3_decode_req_info(u64 error)
{
return (error >> 32) & 0xffff;
}
static char *omap3_l3_code_string(u8 code)
{
switch (code) {
case OMAP_L3_CODE_NOERROR:
return "No Error";
case OMAP_L3_CODE_UNSUP_CMD:
return "Unsupported Command";
case OMAP_L3_CODE_ADDR_HOLE:
return "Address Hole";
case OMAP_L3_CODE_PROTECT_VIOLATION:
return "Protection Violation";
case OMAP_L3_CODE_IN_BAND_ERR:
return "In-band Error";
case OMAP_L3_CODE_REQ_TOUT_NOT_ACCEPT:
return "Request Timeout Not Accepted";
case OMAP_L3_CODE_REQ_TOUT_NO_RESP:
return "Request Timeout, no response";
default:
return "UNKNOWN error";
}
}
static char *omap3_l3_initiator_string(u8 initid)
{
switch (initid) {
case OMAP_L3_LCD:
return "LCD";
case OMAP_L3_SAD2D:
return "SAD2D";
case OMAP_L3_IA_MPU_SS_1:
case OMAP_L3_IA_MPU_SS_2:
case OMAP_L3_IA_MPU_SS_3:
case OMAP_L3_IA_MPU_SS_4:
case OMAP_L3_IA_MPU_SS_5:
return "MPU";
case OMAP_L3_IA_IVA_SS_1:
case OMAP_L3_IA_IVA_SS_2:
case OMAP_L3_IA_IVA_SS_3:
return "IVA_SS";
case OMAP_L3_IA_IVA_SS_DMA_1:
case OMAP_L3_IA_IVA_SS_DMA_2:
case OMAP_L3_IA_IVA_SS_DMA_3:
case OMAP_L3_IA_IVA_SS_DMA_4:
case OMAP_L3_IA_IVA_SS_DMA_5:
case OMAP_L3_IA_IVA_SS_DMA_6:
return "IVA_SS_DMA";
case OMAP_L3_IA_SGX:
return "SGX";
case OMAP_L3_IA_CAM_1:
case OMAP_L3_IA_CAM_2:
case OMAP_L3_IA_CAM_3:
return "CAM";
case OMAP_L3_IA_DAP:
return "DAP";
case OMAP_L3_SDMA_WR_1:
case OMAP_L3_SDMA_WR_2:
return "SDMA_WR";
case OMAP_L3_SDMA_RD_1:
case OMAP_L3_SDMA_RD_2:
case OMAP_L3_SDMA_RD_3:
case OMAP_L3_SDMA_RD_4:
return "SDMA_RD";
case OMAP_L3_USBOTG:
return "USB_OTG";
case OMAP_L3_USBHOST:
return "USB_HOST";
default:
return "UNKNOWN Initiator";
}
}
/**
* omap3_l3_block_irq - handles a register block's irq
* @l3: struct omap3_l3 *
* @base: register block base address
* @error: L3_ERROR_LOG register of our block
*
* Called in hard-irq context. Caller should take care of locking
*
* OMAP36xx TRM gives, on page 2001, Figure 9-10, the Typical Error
* Analysis Sequence, we are following that sequence here, please
* refer to that Figure for more information on the subject.
*/
static irqreturn_t omap3_l3_block_irq(struct omap3_l3 *l3,
u64 error, int error_addr)
{
u8 code = omap3_l3_decode_error_code(error);
u8 initid = omap3_l3_decode_initid(error);
u8 multi = error & L3_ERROR_LOG_MULTI;
u32 address = omap3_l3_decode_addr(error_addr);
WARN(true, "%s Error seen by %s %s at address %x\n",
omap3_l3_code_string(code),
omap3_l3_initiator_string(initid),
multi ? "Multiple Errors" : "",
address);
return IRQ_HANDLED;
}
static irqreturn_t omap3_l3_app_irq(int irq, void *_l3)
{
struct omap3_l3 *l3 = _l3;
u64 status, clear;
u64 error;
u64 error_addr;
u64 err_source = 0;
void __iomem *base;
int int_type;
irqreturn_t ret = IRQ_NONE;
if (irq == l3->app_irq)
int_type = L3_APPLICATION_ERROR;
else
int_type = L3_DEBUG_ERROR;
if (!int_type) {
status = omap3_l3_readll(l3->rt, L3_SI_FLAG_STATUS_0);
/*
* if we have a timeout error, there's nothing we can
* do besides rebooting the board. So let's BUG on any
* of such errors and handle the others. timeout error
* is severe and not expected to occur.
*/
BUG_ON(status & L3_STATUS_0_TIMEOUT_MASK);
} else {
status = omap3_l3_readll(l3->rt, L3_SI_FLAG_STATUS_1);
/* No timeout error for debug sources */
}
base = ((l3->rt) + (*(omap3_l3_bases[int_type] + err_source)));
/* identify the error source */
for (err_source = 0; !(status & (1 << err_source)); err_source++)
;
error = omap3_l3_readll(base, L3_ERROR_LOG);
if (error) {
error_addr = omap3_l3_readll(base, L3_ERROR_LOG_ADDR);
ret |= omap3_l3_block_irq(l3, error, error_addr);
}
/* Clear the status register */
clear = ((L3_AGENT_STATUS_CLEAR_IA << int_type) |
(L3_AGENT_STATUS_CLEAR_TA));
omap3_l3_writell(base, L3_AGENT_STATUS, clear);
/* clear the error log register */
omap3_l3_writell(base, L3_ERROR_LOG, error);
return ret;
}
static int __init omap3_l3_probe(struct platform_device *pdev)
{
struct omap3_l3 *l3;
struct resource *res;
int ret;
int irq;
l3 = kzalloc(sizeof(*l3), GFP_KERNEL);
if (!l3) {
ret = -ENOMEM;
goto err0;
}
platform_set_drvdata(pdev, l3);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(&pdev->dev, "couldn't find resource\n");
ret = -ENODEV;
goto err1;
}
l3->rt = ioremap(res->start, resource_size(res));
if (!(l3->rt)) {
dev_err(&pdev->dev, "ioremap failed\n");
ret = -ENOMEM;
goto err2;
}
irq = platform_get_irq(pdev, 0);
ret = request_irq(irq, omap3_l3_app_irq,
IRQF_DISABLED | IRQF_TRIGGER_RISING,
"l3-debug-irq", l3);
if (ret) {
dev_err(&pdev->dev, "couldn't request debug irq\n");
goto err3;
}
l3->debug_irq = irq;
irq = platform_get_irq(pdev, 1);
ret = request_irq(irq, omap3_l3_app_irq,
IRQF_DISABLED | IRQF_TRIGGER_RISING,
"l3-app-irq", l3);
if (ret) {
dev_err(&pdev->dev, "couldn't request app irq\n");
goto err4;
}
l3->app_irq = irq;
goto err0;
err4:
err3:
iounmap(l3->rt);
err2:
err1:
kfree(l3);
err0:
return ret;
}
static int __exit omap3_l3_remove(struct platform_device *pdev)
{
struct omap3_l3 *l3 = platform_get_drvdata(pdev);
free_irq(l3->app_irq, l3);
free_irq(l3->debug_irq, l3);
iounmap(l3->rt);
kfree(l3);
return 0;
}
static struct platform_driver omap3_l3_driver = {
.remove = __exit_p(omap3_l3_remove),
.driver = {
.name = "omap_l3_smx",
},
};
static int __init omap3_l3_init(void)
{
return platform_driver_probe(&omap3_l3_driver, omap3_l3_probe);
}
postcore_initcall_sync(omap3_l3_init);
static void __exit omap3_l3_exit(void)
{
platform_driver_unregister(&omap3_l3_driver);
}
module_exit(omap3_l3_exit);

338
arch/arm/mach-omap2/omap_l3_smx.h Normal file
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@ -0,0 +1,338 @@
/*
* OMAP3XXX L3 Interconnect Driver header
*
* Copyright (C) 2011 Texas Corporation
* Felipe Balbi <balbi@ti.com>
* Santosh Shilimkar <santosh.shilimkar@ti.com>
* sricharan <r.sricharan@ti.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*/
#ifndef __ARCH_ARM_MACH_OMAP2_L3_INTERCONNECT_3XXX_H
#define __ARCH_ARM_MACH_OMAP2_L3_INTERCONNECT_3XXX_H
/* Register definitions. All 64-bit wide */
#define L3_COMPONENT 0x000
#define L3_CORE 0x018
#define L3_AGENT_CONTROL 0x020
#define L3_AGENT_STATUS 0x028
#define L3_ERROR_LOG 0x058
#define L3_ERROR_LOG_MULTI (1 << 31)
#define L3_ERROR_LOG_SECONDARY (1 << 30)
#define L3_ERROR_LOG_ADDR 0x060
/* Register definitions for Sideband Interconnect */
#define L3_SI_CONTROL 0x020
#define L3_SI_FLAG_STATUS_0 0x510
const u64 shift = 1;
#define L3_STATUS_0_MPUIA_BRST (shift << 0)
#define L3_STATUS_0_MPUIA_RSP (shift << 1)
#define L3_STATUS_0_MPUIA_INBAND (shift << 2)
#define L3_STATUS_0_IVAIA_BRST (shift << 6)
#define L3_STATUS_0_IVAIA_RSP (shift << 7)
#define L3_STATUS_0_IVAIA_INBAND (shift << 8)
#define L3_STATUS_0_SGXIA_BRST (shift << 9)
#define L3_STATUS_0_SGXIA_RSP (shift << 10)
#define L3_STATUS_0_SGXIA_MERROR (shift << 11)
#define L3_STATUS_0_CAMIA_BRST (shift << 12)
#define L3_STATUS_0_CAMIA_RSP (shift << 13)
#define L3_STATUS_0_CAMIA_INBAND (shift << 14)
#define L3_STATUS_0_DISPIA_BRST (shift << 15)
#define L3_STATUS_0_DISPIA_RSP (shift << 16)
#define L3_STATUS_0_DMARDIA_BRST (shift << 18)
#define L3_STATUS_0_DMARDIA_RSP (shift << 19)
#define L3_STATUS_0_DMAWRIA_BRST (shift << 21)
#define L3_STATUS_0_DMAWRIA_RSP (shift << 22)
#define L3_STATUS_0_USBOTGIA_BRST (shift << 24)
#define L3_STATUS_0_USBOTGIA_RSP (shift << 25)
#define L3_STATUS_0_USBOTGIA_INBAND (shift << 26)
#define L3_STATUS_0_USBHOSTIA_BRST (shift << 27)
#define L3_STATUS_0_USBHOSTIA_INBAND (shift << 28)
#define L3_STATUS_0_SMSTA_REQ (shift << 48)
#define L3_STATUS_0_GPMCTA_REQ (shift << 49)
#define L3_STATUS_0_OCMRAMTA_REQ (shift << 50)
#define L3_STATUS_0_OCMROMTA_REQ (shift << 51)
#define L3_STATUS_0_IVATA_REQ (shift << 54)
#define L3_STATUS_0_SGXTA_REQ (shift << 55)
#define L3_STATUS_0_SGXTA_SERROR (shift << 56)
#define L3_STATUS_0_GPMCTA_SERROR (shift << 57)
#define L3_STATUS_0_L4CORETA_REQ (shift << 58)
#define L3_STATUS_0_L4PERTA_REQ (shift << 59)
#define L3_STATUS_0_L4EMUTA_REQ (shift << 60)
#define L3_STATUS_0_MAD2DTA_REQ (shift << 61)
#define L3_STATUS_0_TIMEOUT_MASK (L3_STATUS_0_MPUIA_BRST \
| L3_STATUS_0_MPUIA_RSP \
| L3_STATUS_0_IVAIA_BRST \
| L3_STATUS_0_IVAIA_RSP \
| L3_STATUS_0_SGXIA_BRST \
| L3_STATUS_0_SGXIA_RSP \
| L3_STATUS_0_CAMIA_BRST \
| L3_STATUS_0_CAMIA_RSP \
| L3_STATUS_0_DISPIA_BRST \
| L3_STATUS_0_DISPIA_RSP \
| L3_STATUS_0_DMARDIA_BRST \
| L3_STATUS_0_DMARDIA_RSP \
| L3_STATUS_0_DMAWRIA_BRST \
| L3_STATUS_0_DMAWRIA_RSP \
| L3_STATUS_0_USBOTGIA_BRST \
| L3_STATUS_0_USBOTGIA_RSP \
| L3_STATUS_0_USBHOSTIA_BRST \
| L3_STATUS_0_SMSTA_REQ \
| L3_STATUS_0_GPMCTA_REQ \
| L3_STATUS_0_OCMRAMTA_REQ \
| L3_STATUS_0_OCMROMTA_REQ \
| L3_STATUS_0_IVATA_REQ \
| L3_STATUS_0_SGXTA_REQ \
| L3_STATUS_0_L4CORETA_REQ \
| L3_STATUS_0_L4PERTA_REQ \
| L3_STATUS_0_L4EMUTA_REQ \
| L3_STATUS_0_MAD2DTA_REQ)
#define L3_SI_FLAG_STATUS_1 0x530
#define L3_STATUS_1_MPU_DATAIA (1 << 0)
#define L3_STATUS_1_DAPIA0 (1 << 3)
#define L3_STATUS_1_DAPIA1 (1 << 4)
#define L3_STATUS_1_IVAIA (1 << 6)
#define L3_PM_ERROR_LOG 0x020
#define L3_PM_CONTROL 0x028
#define L3_PM_ERROR_CLEAR_SINGLE 0x030
#define L3_PM_ERROR_CLEAR_MULTI 0x038
#define L3_PM_REQ_INFO_PERMISSION(n) (0x048 + (0x020 * n))
#define L3_PM_READ_PERMISSION(n) (0x050 + (0x020 * n))
#define L3_PM_WRITE_PERMISSION(n) (0x058 + (0x020 * n))
#define L3_PM_ADDR_MATCH(n) (0x060 + (0x020 * n))
/* L3 error log bit fields. Common for IA and TA */
#define L3_ERROR_LOG_CODE 24
#define L3_ERROR_LOG_INITID 8
#define L3_ERROR_LOG_CMD 0
/* L3 agent status bit fields. */
#define L3_AGENT_STATUS_CLEAR_IA 0x10000000
#define L3_AGENT_STATUS_CLEAR_TA 0x01000000
#define OMAP34xx_IRQ_L3_APP 10
#define L3_APPLICATION_ERROR 0x0
#define L3_DEBUG_ERROR 0x1
enum omap3_l3_initiator_id {
/* LCD has 1 ID */
OMAP_L3_LCD = 29,
/* SAD2D has 1 ID */
OMAP_L3_SAD2D = 28,
/* MPU has 5 IDs */
OMAP_L3_IA_MPU_SS_1 = 27,
OMAP_L3_IA_MPU_SS_2 = 26,
OMAP_L3_IA_MPU_SS_3 = 25,
OMAP_L3_IA_MPU_SS_4 = 24,
OMAP_L3_IA_MPU_SS_5 = 23,
/* IVA2.2 SS has 3 IDs*/
OMAP_L3_IA_IVA_SS_1 = 22,
OMAP_L3_IA_IVA_SS_2 = 21,
OMAP_L3_IA_IVA_SS_3 = 20,
/* IVA 2.2 SS DMA has 6 IDS */
OMAP_L3_IA_IVA_SS_DMA_1 = 19,
OMAP_L3_IA_IVA_SS_DMA_2 = 18,
OMAP_L3_IA_IVA_SS_DMA_3 = 17,
OMAP_L3_IA_IVA_SS_DMA_4 = 16,
OMAP_L3_IA_IVA_SS_DMA_5 = 15,
OMAP_L3_IA_IVA_SS_DMA_6 = 14,
/* SGX has 1 ID */
OMAP_L3_IA_SGX = 13,
/* CAM has 3 ID */
OMAP_L3_IA_CAM_1 = 12,
OMAP_L3_IA_CAM_2 = 11,
OMAP_L3_IA_CAM_3 = 10,
/* DAP has 1 ID */
OMAP_L3_IA_DAP = 9,
/* SDMA WR has 2 IDs */
OMAP_L3_SDMA_WR_1 = 8,
OMAP_L3_SDMA_WR_2 = 7,
/* SDMA RD has 4 IDs */
OMAP_L3_SDMA_RD_1 = 6,
OMAP_L3_SDMA_RD_2 = 5,
OMAP_L3_SDMA_RD_3 = 4,
OMAP_L3_SDMA_RD_4 = 3,
/* HSUSB OTG has 1 ID */
OMAP_L3_USBOTG = 2,
/* HSUSB HOST has 1 ID */
OMAP_L3_USBHOST = 1,
};
enum omap3_l3_code {
OMAP_L3_CODE_NOERROR = 0,
OMAP_L3_CODE_UNSUP_CMD = 1,
OMAP_L3_CODE_ADDR_HOLE = 2,
OMAP_L3_CODE_PROTECT_VIOLATION = 3,
OMAP_L3_CODE_IN_BAND_ERR = 4,
/* codes 5 and 6 are reserved */
OMAP_L3_CODE_REQ_TOUT_NOT_ACCEPT = 7,
OMAP_L3_CODE_REQ_TOUT_NO_RESP = 8,
/* codes 9 - 15 are also reserved */
};
struct omap3_l3 {
struct device *dev;
struct clk *ick;
/* memory base*/
void __iomem *rt;
int debug_irq;
int app_irq;
/* true when and inband functional error occurs */
unsigned inband:1;
};
/* offsets for l3 agents in order with the Flag status register */
unsigned int __iomem omap3_l3_app_bases[] = {
/* MPU IA */
0x1400,
0x1400,
0x1400,
/* RESERVED */
0,
0,
0,
/* IVA 2.2 IA */
0x1800,
0x1800,
0x1800,
/* SGX IA */
0x1c00,
0x1c00,
/* RESERVED */
0,
/* CAMERA IA */
0x5800,
0x5800,
0x5800,
/* DISPLAY IA */
0x5400,
0x5400,
/* RESERVED */
0,
/*SDMA RD IA */
0x4c00,
0x4c00,
/* RESERVED */
0,
/* SDMA WR IA */
0x5000,
0x5000,
/* RESERVED */
0,
/* USB OTG IA */
0x4400,
0x4400,
0x4400,
/* USB HOST IA */
0x4000,
0x4000,
/* RESERVED */
0,
0,
0,
0,
/* SAD2D IA */
0x3000,
0x3000,
0x3000,
/* RESERVED */
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
/* SMA TA */
0x2000,
/* GPMC TA */
0x2400,
/* OCM RAM TA */
0x2800,
/* OCM ROM TA */
0x2C00,
/* L4 CORE TA */
0x6800,
/* L4 PER TA */
0x6c00,
/* IVA 2.2 TA */
0x6000,
/* SGX TA */
0x6400,
/* L4 EMU TA */
0x7000,
/* GPMC TA */
0x2400,
/* L4 CORE TA */
0x6800,
/* L4 PER TA */
0x6c00,
/* L4 EMU TA */
0x7000,
/* MAD2D TA */
0x3400,
/* RESERVED */
0,
0,
};
unsigned int __iomem omap3_l3_debug_bases[] = {
/* MPU DATA IA */
0x1400,
/* RESERVED */
0,
0,
/* DAP IA */
0x5c00,
0x5c00,
/* RESERVED */
0,
/* IVA 2.2 IA */
0x1800,
/* REST RESERVED */
};
u32 *omap3_l3_bases[] = {
omap3_l3_app_bases,
omap3_l3_debug_bases,
};
/*
* REVISIT define __raw_readll/__raw_writell here, but move them to
* <asm/io.h> at some point
*/
#define __raw_writell(v, a) (__chk_io_ptr(a), \
*(volatile u64 __force *)(a) = (v))
#define __raw_readll(a) (__chk_io_ptr(a), \
*(volatile u64 __force *)(a))
#endif