The L3 Error handling on OMAP5 for the most part is very similar
to that of OMAP4, and had leveraged common data structures and
register layout definitions so far. Upon closer inspection, there
are a few minor differences causing an incorrect decoding and
reporting of the master NIU upon an error:
1. The L3_TARG_STDERRLOG_MSTADDR.STDERRLOG_MSTADDR occupies
11 bits on OMAP5 as against 8 bits on OMAP4, with the master
NIU connID encoded in the 6 MSBs of the STDERRLOG_MSTADDR
field.
2. The CLK3 FlagMux component has 1 input source on OMAP4 and 3
input sources on OMAP5. The common DEBUGSS source is at a
different input on each SoC.
Fix the above issues by using a OMAP5-specific compatible property
and using SoC-specific data where there are differences.
Cc: Nishanth Menon <nm@xxxxxx>
Signed-off-by: Suman Anna <s-anna@xxxxxx>
---
Some validation traces by adding couple of traces and intentionally
creating L3 errors from DSP & IPU by accessing invalid Timers
Before Patch:
OMAP4 [Correct]
IPU accessing Timer4
[ 46.548095] flagmux = 1, err_reg = 0x8000 err_src = 0xf
[ 46.553344] mstaddr = 0x44 mask = 0xfc masterid = 0x11
[ 46.553955] ------------[ cut here ]------------
[ 46.563171] WARNING: CPU: 0 PID: 4 at drivers/bus/omap_l3_noc.c:149 l3_interrupt_handler+0x280/0x388()
[ 46.564941] 44000000.ocp:L3 Custom Error: MASTER DucatiM3 TARGET L4PER3 (Idle): Data Access in User mode during
Functional access
DSP accessing Timer5:
[ 114.018524] flagmux = 0, err_reg = 0x4 err_src = 0x2
[ 114.023498] mstaddr = 0x20 mask = 0xfc masterid = 0x8
[ 114.028564] ------------[ cut here ]------------
[ 114.033233] WARNING: CPU: 0 PID: 0 at drivers/bus/omap_l3_noc.c:149 l3_interrupt_handler+0x280/0x388()
[ 114.042572] 44000000.ocp:L3 Custom Error: MASTER DSP TARGET ABE (Idle): Data Access in Supervisor mode during Functional
access
OMAP5 [Incorrect]
IPU accessing Timer4:
[ 29.579306] flagmux = 1, err_reg = 0x8000 err_src = 0xf
[ 29.584550] mstaddr = 0x220 mask = 0xfc masterid = 0x8
[ 29.589705] ------------[ cut here ]------------
[ 29.594345] WARNING: CPU: 0 PID: 61 at drivers/bus/omap_l3_noc.c:149 l3_interrupt_handler+0x280/0x388()
[ 29.603774] 44000000.ocp:L3 Custom Error: MASTER DSP TARGET L4PER3 (Idle): Data Access in User mode during Functional
access
DSP accessing Timer5:
[ 21.347105] flagmux = 0, err_reg = 0x4 err_src = 0x2
[ 21.352091] mstaddr = 0x100 mask = 0xfc masterid = 0x0
[ 21.357250] ------------[ cut here ]------------
[ 21.361896] WARNING: CPU: 0 PID: 0 at drivers/bus/omap_l3_noc.c:149 l3_interrupt_handler+0x280/0x388()
[ 21.371242] 44000000.ocp:L3 Custom Error: MASTER MPU TARGET ABE (Idle): Data Access in Supervisor mode during Functional
access
After Patch:
OMAP4 same as above
OMAP5 [Corrected]
IPU accessing Timer4
[ 67.896693] flagmux = 1, err_reg = 0x8000 err_src = 0xf
[ 67.901940] mstaddr = 0x220 mask = 0x7e0 masterid = 0x11
[ 67.907275] ------------[ cut here ]------------
[ 67.911924] WARNING: CPU: 0 PID: 61 at drivers/bus/omap_l3_noc.c:149 l3_interrupt_handler+0x280/0x388()
[ 67.921357] 44000000.ocp:L3 Custom Error: MASTER DucatiM3 TARGET L4PER3 (Idle): Data Access in User mode during
Functional access
DSP accessing Timer5
[ 24.452565] flagmux = 0, err_reg = 0x4 err_src = 0x2
[ 24.457552] mstaddr = 0x100 mask = 0x7e0 masterid = 0x8
[ 24.462798] ------------[ cut here ]------------
[ 24.467449] WARNING: CPU: 0 PID: 0 at drivers/bus/omap_l3_noc.c:149 l3_interrupt_handler+0x280/0x388()
[ 24.476795] 44000000.ocp:L3 Custom Error: MASTER DSP TARGET ABE (Idle): Data Access in Supervisor mode during Functional
access
.../devicetree/bindings/arm/omap/l3-noc.txt | 1 +
arch/arm/boot/dts/omap5.dtsi | 2 +-
drivers/bus/omap_l3_noc.c | 5 ++-
drivers/bus/omap_l3_noc.h | 52 ++++++++++++++++------
4 files changed, 44 insertions(+), 16 deletions(-)
diff --git a/Documentation/devicetree/bindings/arm/omap/l3-noc.txt b/Documentation/devicetree/bindings/arm/omap/l3-noc.txt
index 974624ea68f6..161448da959d 100644
--- a/Documentation/devicetree/bindings/arm/omap/l3-noc.txt
+++ b/Documentation/devicetree/bindings/arm/omap/l3-noc.txt
@@ -6,6 +6,7 @@ provided by Arteris.
Required properties:
- compatible : Should be "ti,omap3-l3-smx" for OMAP3 family
Should be "ti,omap4-l3-noc" for OMAP4 family
+ Should be "ti,omap5-l3-noc" for OMAP5 family
Should be "ti,dra7-l3-noc" for DRA7 family
Should be "ti,am4372-l3-noc" for AM43 family
- reg: Contains L3 register address range for each noc domain.
diff --git a/arch/arm/boot/dts/omap5.dtsi b/arch/arm/boot/dts/omap5.dtsi
index efe5f737f39b..7d24ae0306b5 100644
--- a/arch/arm/boot/dts/omap5.dtsi
+++ b/arch/arm/boot/dts/omap5.dtsi
@@ -128,7 +128,7 @@
* hierarchy.
*/
ocp {
- compatible = "ti,omap4-l3-noc", "simple-bus";
+ compatible = "ti,omap5-l3-noc", "simple-bus";
#address-cells = <1>;
#size-cells = <1>;
ranges;
diff --git a/drivers/bus/omap_l3_noc.c b/drivers/bus/omap_l3_noc.c
index 11f7982cbdb3..ebee57d715d2 100644
--- a/drivers/bus/omap_l3_noc.c
+++ b/drivers/bus/omap_l3_noc.c
@@ -1,7 +1,7 @@
/*
* OMAP L3 Interconnect error handling driver
*
- * Copyright (C) 2011-2014 Texas Instruments Incorporated - http://www.ti.com/
+ * Copyright (C) 2011-2015 Texas Instruments Incorporated - http://www.ti.com/
* Santosh Shilimkar <santosh.shilimkar@xxxxxx>
* Sricharan <r.sricharan@xxxxxx>
*
@@ -233,7 +233,8 @@ static irqreturn_t l3_interrupt_handler(int irq, void *_l3)
}
static const struct of_device_id l3_noc_match[] = {
- {.compatible = "ti,omap4-l3-noc", .data = &omap_l3_data},
+ {.compatible = "ti,omap4-l3-noc", .data = &omap4_l3_data},
+ {.compatible = "ti,omap5-l3-noc", .data = &omap5_l3_data},
{.compatible = "ti,dra7-l3-noc", .data = &dra_l3_data},
{.compatible = "ti,am4372-l3-noc", .data = &am4372_l3_data},
{},
diff --git a/drivers/bus/omap_l3_noc.h b/drivers/bus/omap_l3_noc.h
index 95254585db86..3ba40db7380b 100644
--- a/drivers/bus/omap_l3_noc.h
+++ b/drivers/bus/omap_l3_noc.h
@@ -1,7 +1,7 @@
/*
* OMAP L3 Interconnect error handling driver header
*
- * Copyright (C) 2011-2014 Texas Instruments Incorporated - http://www.ti.com/
+ * Copyright (C) 2011-2015 Texas Instruments Incorporated - http://www.ti.com/
* Santosh Shilimkar <santosh.shilimkar@xxxxxx>
* sricharan <r.sricharan@xxxxxx>
*
@@ -175,16 +175,14 @@ static struct l3_flagmux_data omap_l3_flagmux_clk2 = {
};
-static struct l3_target_data omap_l3_target_data_clk3[] = {
- {0x0100, "EMUSS",},
- {0x0300, "DEBUG SOURCE",},
- {0x0, "HOST CLK3",},
+static struct l3_target_data omap4_l3_target_data_clk3[] = {
+ {0x0100, "DEBUGSS",},
};
-static struct l3_flagmux_data omap_l3_flagmux_clk3 = {
+static struct l3_flagmux_data omap4_l3_flagmux_clk3 = {
.offset = 0x0200,
- .l3_targ = omap_l3_target_data_clk3,
- .num_targ_data = ARRAY_SIZE(omap_l3_target_data_clk3),
+ .l3_targ = omap4_l3_target_data_clk3,
+ .num_targ_data = ARRAY_SIZE(omap4_l3_target_data_clk3),
};
static struct l3_masters_data omap_l3_masters[] = {
@@ -215,21 +213,49 @@ static struct l3_masters_data omap_l3_masters[] = {
{ 0x32, "USBHOSTFS"}
};
-static struct l3_flagmux_data *omap_l3_flagmux[] = {
+static struct l3_flagmux_data *omap4_l3_flagmux[] = {
&omap_l3_flagmux_clk1,
&omap_l3_flagmux_clk2,
- &omap_l3_flagmux_clk3,
+ &omap4_l3_flagmux_clk3,
};
-static const struct omap_l3 omap_l3_data = {
- .l3_flagmux = omap_l3_flagmux,
- .num_modules = ARRAY_SIZE(omap_l3_flagmux),
+static const struct omap_l3 omap4_l3_data = {
+ .l3_flagmux = omap4_l3_flagmux,
+ .num_modules = ARRAY_SIZE(omap4_l3_flagmux),
.l3_masters = omap_l3_masters,
.num_masters = ARRAY_SIZE(omap_l3_masters),
/* The 6 MSBs of register field used to distinguish initiator */
.mst_addr_mask = 0xFC,
};
+/* OMAP5 data */
+static struct l3_target_data omap5_l3_target_data_clk3[] = {
+ {0x0100, "L3INSTR",},
+ {0x0300, "DEBUGSS",},
+ {0x0, "HOSTCLK3",},
+};
+
+static struct l3_flagmux_data omap5_l3_flagmux_clk3 = {
+ .offset = 0x0200,
+ .l3_targ = omap5_l3_target_data_clk3,
+ .num_targ_data = ARRAY_SIZE(omap5_l3_target_data_clk3),
+};
+
+static struct l3_flagmux_data *omap5_l3_flagmux[] = {
+ &omap_l3_flagmux_clk1,
+ &omap_l3_flagmux_clk2,
+ &omap5_l3_flagmux_clk3,
+};
+
+static const struct omap_l3 omap5_l3_data = {
+ .l3_flagmux = omap5_l3_flagmux,
+ .num_modules = ARRAY_SIZE(omap5_l3_flagmux),
+ .l3_masters = omap_l3_masters,
+ .num_masters = ARRAY_SIZE(omap_l3_masters),
+ /* The 6 MSBs of register field used to distinguish initiator */
+ .mst_addr_mask = 0x7E0,
+};
+
/* DRA7 data */
static struct l3_target_data dra_l3_target_data_clk1[] = {
{0x2a00, "AES1",},
--
2.3.5
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
