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-rw-r--r--drivers/bus/omap_l3_noc.c211
1 files changed, 113 insertions, 98 deletions
diff --git a/drivers/bus/omap_l3_noc.c b/drivers/bus/omap_l3_noc.c
index 42e411457494..0691e6d9c1e4 100644
--- a/drivers/bus/omap_l3_noc.c
+++ b/drivers/bus/omap_l3_noc.c
@@ -26,14 +26,20 @@
#include "omap_l3_noc.h"
-/*
- * Interrupt Handler for L3 error detection.
- * 1) Identify the L3 clockdomain partition to which the error belongs to.
- * 2) Identify the slave where the error information is logged
- * 3) Print the logged information.
- * 4) Add dump stack to provide kernel trace.
+/**
+ * l3_handle_target() - Handle Target specific parse and reporting
+ * @l3: pointer to l3 struct
+ * @base: base address of clkdm
+ * @flag_mux: flagmux corresponding to the event
+ * @err_src: error source index of the slave (target)
*
- * Two Types of errors :
+ * This does the second part of the error interrupt handling:
+ * 3) Parse in the slave information
+ * 4) Print the logged information.
+ * 5) Add dump stack to provide kernel trace.
+ * 6) Clear the source if known.
+ *
+ * This handles two types of errors:
* 1) Custom errors in L3 :
* Target like DMM/FW/EMIF generates SRESP=ERR error
* 2) Standard L3 error:
@@ -49,22 +55,107 @@
* can be trapped as well. But the trapping is implemented as part
* secure software and hence need not be implemented here.
*/
-static irqreturn_t l3_interrupt_handler(int irq, void *_l3)
+static int l3_handle_target(struct omap_l3 *l3, void __iomem *base,
+ struct l3_flagmux_data *flag_mux, int err_src)
{
-
- struct omap_l3 *l3 = _l3;
- int inttype, i, k;
- int err_src = 0;
- u32 std_err_main, err_reg, clear, masterid;
- void __iomem *base, *l3_targ_base;
+ int k;
+ u32 std_err_main, clear, masterid;
+ void __iomem *l3_targ_base;
void __iomem *l3_targ_stderr, *l3_targ_slvofslsb, *l3_targ_mstaddr;
- char *target_name, *master_name = "UN IDENTIFIED";
struct l3_target_data *l3_targ_inst;
- struct l3_flagmux_data *flag_mux;
struct l3_masters_data *master;
+ char *target_name, *master_name = "UN IDENTIFIED";
char *err_description;
char err_string[30] = { 0 };
+ /* We DONOT expect err_src to go out of bounds */
+ BUG_ON(err_src > MAX_CLKDM_TARGETS);
+
+ if (err_src < flag_mux->num_targ_data) {
+ l3_targ_inst = &flag_mux->l3_targ[err_src];
+ target_name = l3_targ_inst->name;
+ l3_targ_base = base + l3_targ_inst->offset;
+ } else {
+ target_name = L3_TARGET_NOT_SUPPORTED;
+ }
+
+ if (target_name == L3_TARGET_NOT_SUPPORTED)
+ return -ENODEV;
+
+ /* Read the stderrlog_main_source from clk domain */
+ l3_targ_stderr = l3_targ_base + L3_TARG_STDERRLOG_MAIN;
+ l3_targ_slvofslsb = l3_targ_base + L3_TARG_STDERRLOG_SLVOFSLSB;
+
+ std_err_main = readl_relaxed(l3_targ_stderr);
+
+ switch (std_err_main & CUSTOM_ERROR) {
+ case STANDARD_ERROR:
+ err_description = "Standard";
+ snprintf(err_string, sizeof(err_string),
+ ": At Address: 0x%08X ",
+ readl_relaxed(l3_targ_slvofslsb));
+
+ l3_targ_mstaddr = l3_targ_base + L3_TARG_STDERRLOG_MSTADDR;
+ break;
+
+ case CUSTOM_ERROR:
+ err_description = "Custom";
+
+ l3_targ_mstaddr = l3_targ_base +
+ L3_TARG_STDERRLOG_CINFO_MSTADDR;
+ break;
+
+ default:
+ /* Nothing to be handled here as of now */
+ return 0;
+ }
+
+ /* STDERRLOG_MSTADDR Stores the NTTP master address. */
+ masterid = (readl_relaxed(l3_targ_mstaddr) &
+ l3->mst_addr_mask) >> __ffs(l3->mst_addr_mask);
+
+ for (k = 0, master = l3->l3_masters; k < l3->num_masters;
+ k++, master++) {
+ if (masterid == master->id) {
+ master_name = master->name;
+ break;
+ }
+ }
+
+ WARN(true,
+ "%s:L3 %s Error: MASTER %s TARGET %s%s\n",
+ dev_name(l3->dev),
+ err_description,
+ master_name, target_name,
+ err_string);
+
+ /* clear the std error log*/
+ clear = std_err_main | CLEAR_STDERR_LOG;
+ writel_relaxed(clear, l3_targ_stderr);
+
+ return 0;
+}
+
+/**
+ * l3_interrupt_handler() - interrupt handler for l3 events
+ * @irq: irq number
+ * @_l3: pointer to l3 structure
+ *
+ * Interrupt Handler for L3 error detection.
+ * 1) Identify the L3 clockdomain partition to which the error belongs to.
+ * 2) Identify the slave where the error information is logged
+ * ... handle the slave event..
+ * 7) if the slave is unknown, mask out the slave.
+ */
+static irqreturn_t l3_interrupt_handler(int irq, void *_l3)
+{
+ struct omap_l3 *l3 = _l3;
+ int inttype, i, ret;
+ int err_src = 0;
+ u32 err_reg, mask_val;
+ void __iomem *base, *mask_reg;
+ struct l3_flagmux_data *flag_mux;
+
/* Get the Type of interrupt */
inttype = irq == l3->app_irq ? L3_APPLICATION_ERROR : L3_DEBUG_ERROR;
@@ -80,35 +171,18 @@ static irqreturn_t l3_interrupt_handler(int irq, void *_l3)
/* Get the corresponding error and analyse */
if (err_reg) {
- bool std_err = true;
-
/* Identify the source from control status register */
err_src = __ffs(err_reg);
- /* We DONOT expect err_src to go out of bounds */
- BUG_ON(err_src > MAX_CLKDM_TARGETS);
-
- if (err_src < flag_mux->num_targ_data) {
- l3_targ_inst = &flag_mux->l3_targ[err_src];
- target_name = l3_targ_inst->name;
- l3_targ_base = base + l3_targ_inst->offset;
- } else {
- target_name = L3_TARGET_NOT_SUPPORTED;
- }
+ ret = l3_handle_target(l3, base, flag_mux, err_src);
/*
- * If we do not know of a register offset to decode
- * and clear, then mask.
+ * Certain plaforms may have "undocumented" status
+ * pending on boot. So dont generate a severe warning
+ * here. Just mask it off to prevent the error from
+ * reoccuring and locking up the system.
*/
- if (target_name == L3_TARGET_NOT_SUPPORTED) {
- u32 mask_val;
- void __iomem *mask_reg;
-
- /*
- * Certain plaforms may have "undocumented"
- * status pending on boot.. So dont generate
- * a severe warning here.
- */
+ if (ret) {
dev_err(l3->dev,
"L3 %s error: target %d mod:%d %s\n",
inttype ? "debug" : "application",
@@ -119,67 +193,8 @@ static irqreturn_t l3_interrupt_handler(int irq, void *_l3)
mask_val = readl_relaxed(mask_reg);
mask_val &= ~(1 << err_src);
writel_relaxed(mask_val, mask_reg);
-
- break;
}
- /* Read the stderrlog_main_source from clk domain */
- l3_targ_stderr = l3_targ_base + L3_TARG_STDERRLOG_MAIN;
- l3_targ_slvofslsb = l3_targ_base +
- L3_TARG_STDERRLOG_SLVOFSLSB;
-
- std_err_main = readl_relaxed(l3_targ_stderr);
-
- switch (std_err_main & CUSTOM_ERROR) {
- case STANDARD_ERROR:
- err_description = "Standard";
- snprintf(err_string, sizeof(err_string),
- ": At Address: 0x%08X ",
- readl_relaxed(l3_targ_slvofslsb));
-
- l3_targ_mstaddr = l3_targ_base +
- L3_TARG_STDERRLOG_MSTADDR;
- break;
-
- case CUSTOM_ERROR:
- err_description = "Custom";
-
- l3_targ_mstaddr = l3_targ_base +
- L3_TARG_STDERRLOG_CINFO_MSTADDR;
- break;
-
- default:
- std_err = false;
- /* Nothing to be handled here as of now */
- break;
- }
-
- if (!std_err)
- break;
-
- /* STDERRLOG_MSTADDR Stores the NTTP master address. */
- masterid = (readl_relaxed(l3_targ_mstaddr) &
- l3->mst_addr_mask) >>
- __ffs(l3->mst_addr_mask);
-
- for (k = 0, master = l3->l3_masters;
- k < l3->num_masters; k++, master++) {
- if (masterid == master->id) {
- master_name = master->name;
- break;
- }
- }
-
- WARN(true,
- "%s:L3 %s Error: MASTER %s TARGET %s%s\n",
- dev_name(l3->dev),
- err_description,
- master_name, target_name,
- err_string);
- /* clear the std error log*/
- clear = std_err_main | CLEAR_STDERR_LOG;
- writel_relaxed(clear, l3_targ_stderr);
-
/* Error found so break the for loop */
break;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-15 12:43:54 +0000