bus: omap_l3_noc: add information about the type of operation

Today we get error such as
L3 Custom Error: MASTER MPU TARGET L4PER2

But since the actual instruction triggerring the error Vs the point
at which we report error may not be aligned, it makes sense to try
and provide additional information - example the type of operation
that was attempted to being performed can help narrow the debug down
further.

This helps provide log such as:
L3 Custom Error: MASTER MPU TARGET L4PER2 (Read)

Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Darren Etheridge <detheridge@ti.com>
Tested-by: Sekhar Nori <nsekhar@ti.com>

diff --git a/drivers/bus/omap_l3_noc.c b/drivers/bus/omap_l3_noc.c
index 00e4fed..9d021d0 100644 (file)
--- a/drivers/bus/omap_l3_noc.c
+++ b/drivers/bus/omap_l3_noc.c
@@ -60,8 +60,10 @@ static int l3_handle_target(struct omap_l3 *l3, void __iomem *base,
 {
        int k;
        u32 std_err_main, clear, masterid;
+       u8 op_code;
        void __iomem *l3_targ_base;
        void __iomem *l3_targ_stderr, *l3_targ_slvofslsb, *l3_targ_mstaddr;
+       void __iomem *l3_targ_hdr;
        struct l3_target_data *l3_targ_inst;
        struct l3_masters_data *master;
        char *target_name, *master_name = "UN IDENTIFIED";
@@ -96,6 +98,7 @@ static int l3_handle_target(struct omap_l3 *l3, void __iomem *base,
                         readl_relaxed(l3_targ_slvofslsb));
 
                l3_targ_mstaddr = l3_targ_base + L3_TARG_STDERRLOG_MSTADDR;
+               l3_targ_hdr = l3_targ_base + L3_TARG_STDERRLOG_HDR;
                break;
 
        case CUSTOM_ERROR:
@@ -103,6 +106,7 @@ static int l3_handle_target(struct omap_l3 *l3, void __iomem *base,
 
                l3_targ_mstaddr = l3_targ_base +
                                  L3_TARG_STDERRLOG_CINFO_MSTADDR;
+               l3_targ_hdr = l3_targ_base + L3_TARG_STDERRLOG_CINFO_OPCODE;
                break;
 
        default:
@@ -122,11 +126,14 @@ static int l3_handle_target(struct omap_l3 *l3, void __iomem *base,
                }
        }
 
+       op_code = readl_relaxed(l3_targ_hdr) & 0x7;
+
        WARN(true,
-            "%s:L3 %s Error: MASTER %s TARGET %s%s\n",
+            "%s:L3 %s Error: MASTER %s TARGET %s (%s)%s\n",
             dev_name(l3->dev),
             err_description,
             master_name, target_name,
+            l3_transaction_type[op_code],
             err_string);
 
        /* clear the std error log*/

diff --cc drivers/bus/omap_l3_noc.h
Simple merge