[PULL 30/46] hw/intc/aspeed: Refactor INTC to support separate input and output pin indices

["Cédric Le Goater" <clg@redhat.com>]

From: Jamin Lin <jamin_lin@aspeedtech.com>

Refactors the INTC to distinguish between input and output pin indices,
improving interrupt handling clarity and accuracy.

Updated the functions to handle both input and output pin indices.
Added detailed logging for input and output pin indices in trace events.

These changes ensure that the INTC controller can handle multiple input and
output pins, improving support for the AST2700 A1.

Signed-off-by: Jamin Lin <jamin_lin@aspeedtech.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Link: https://lore.kernel.org/qemu-devel/20250307035945.3698802-14-jamin_lin@aspeedtech.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
 hw/intc/aspeed_intc.c | 97 +++++++++++++++++++++++++++----------------
 hw/intc/trace-events  | 12 +++---
 2 files changed, 67 insertions(+), 42 deletions(-)

diff --git a/hw/intc/aspeed_intc.c b/hw/intc/aspeed_intc.c
index 6f37afc17e25..1cbee0e17a5f 100644
--- a/hw/intc/aspeed_intc.c
+++ b/hw/intc/aspeed_intc.c
@@ -42,20 +42,32 @@ REG32(GICINT136_STATUS,     0x804)
 
 #define GICINT_STATUS_BASE     R_GICINT128_STATUS
 
-static void aspeed_intc_update(AspeedINTCState *s, int irq, int level)
+/*
+ * Update the state of an interrupt controller pin by setting
+ * the specified output pin to the given level.
+ * The input pin index should be between 0 and the number of input pins.
+ * The output pin index should be between 0 and the number of output pins.
+ */
+static void aspeed_intc_update(AspeedINTCState *s, int inpin_idx,
+                               int outpin_idx, int level)
 {
     AspeedINTCClass *aic = ASPEED_INTC_GET_CLASS(s);
     const char *name = object_get_typename(OBJECT(s));
 
-    if (irq >= aic->num_inpins) {
-        qemu_log_mask(LOG_GUEST_ERROR,
-                      "%s: Invalid input pin index: %d\n",
-                      __func__, irq);
+    if (inpin_idx >= aic->num_inpins) {
+        qemu_log_mask(LOG_GUEST_ERROR, "%s: Invalid input pin index: %d\n",
+                      __func__, inpin_idx);
         return;
     }
 
-    trace_aspeed_intc_update_irq(name, irq, level);
-    qemu_set_irq(s->output_pins[irq], level);
+    if (outpin_idx >= aic->num_outpins) {
+        qemu_log_mask(LOG_GUEST_ERROR, "%s: Invalid output pin index: %d\n",
+                      __func__, outpin_idx);
+        return;
+    }
+
+    trace_aspeed_intc_update_irq(name, inpin_idx, outpin_idx, level);
+    qemu_set_irq(s->output_pins[outpin_idx], level);
 }
 
 /*
@@ -72,23 +84,28 @@ static void aspeed_intc_set_irq(void *opaque, int irq, int level)
     uint32_t status_reg = GICINT_STATUS_BASE + ((0x100 * irq) >> 2);
     uint32_t select = 0;
     uint32_t enable;
+    int outpin_idx;
+    int inpin_idx;
     int i;
 
+    outpin_idx = irq;
+    inpin_idx = irq;
+
     if (irq >= aic->num_inpins) {
         qemu_log_mask(LOG_GUEST_ERROR, "%s: Invalid input pin index: %d\n",
                       __func__, irq);
         return;
     }
 
-    trace_aspeed_intc_set_irq(name, irq, level);
-    enable = s->enable[irq];
+    trace_aspeed_intc_set_irq(name, inpin_idx, level);
+    enable = s->enable[inpin_idx];
 
     if (!level) {
         return;
     }
 
     for (i = 0; i < aic->num_lines; i++) {
-        if (s->orgates[irq].levels[i]) {
+        if (s->orgates[inpin_idx].levels[i]) {
             if (enable & BIT(i)) {
                 select |= BIT(i);
             }
@@ -101,7 +118,7 @@ static void aspeed_intc_set_irq(void *opaque, int irq, int level)
 
     trace_aspeed_intc_select(name, select);
 
-    if (s->mask[irq] || s->regs[status_reg]) {
+    if (s->mask[inpin_idx] || s->regs[status_reg]) {
         /*
          * a. mask is not 0 means in ISR mode
          * sources interrupt routine are executing.
@@ -110,16 +127,17 @@ static void aspeed_intc_set_irq(void *opaque, int irq, int level)
          *
          * save source interrupt to pending variable.
          */
-        s->pending[irq] |= select;
-        trace_aspeed_intc_pending_irq(name, irq, s->pending[irq]);
+        s->pending[inpin_idx] |= select;
+        trace_aspeed_intc_pending_irq(name, inpin_idx, s->pending[inpin_idx]);
     } else {
         /*
          * notify firmware which source interrupt are coming
          * by setting status register
          */
         s->regs[status_reg] = select;
-        trace_aspeed_intc_trigger_irq(name, irq, s->regs[status_reg]);
-        aspeed_intc_update(s, irq, 1);
+        trace_aspeed_intc_trigger_irq(name, inpin_idx, outpin_idx,
+                                      s->regs[status_reg]);
+        aspeed_intc_update(s, inpin_idx, outpin_idx, 1);
     }
 }
 
@@ -131,14 +149,16 @@ static void aspeed_intc_enable_handler(AspeedINTCState *s, hwaddr offset,
     uint32_t reg = offset >> 2;
     uint32_t old_enable;
     uint32_t change;
+    int inpin_idx;
     uint32_t irq;
 
     irq = (offset & 0x0f00) >> 8;
+    inpin_idx = irq;
 
-    if (irq >= aic->num_inpins) {
+    if (inpin_idx >= aic->num_inpins) {
         qemu_log_mask(LOG_GUEST_ERROR,
                       "%s: Invalid input pin index: %d\n",
-                      __func__, irq);
+                      __func__, inpin_idx);
         return;
     }
 
@@ -149,17 +169,17 @@ static void aspeed_intc_enable_handler(AspeedINTCState *s, hwaddr offset,
      */
 
     /* disable all source interrupt */
-    if (!data && !s->enable[irq]) {
+    if (!data && !s->enable[inpin_idx]) {
         s->regs[reg] = data;
         return;
     }
 
-    old_enable = s->enable[irq];
-    s->enable[irq] |= data;
+    old_enable = s->enable[inpin_idx];
+    s->enable[inpin_idx] |= data;
 
     /* enable new source interrupt */
-    if (old_enable != s->enable[irq]) {
-        trace_aspeed_intc_enable(name, s->enable[irq]);
+    if (old_enable != s->enable[inpin_idx]) {
+        trace_aspeed_intc_enable(name, s->enable[inpin_idx]);
         s->regs[reg] = data;
         return;
     }
@@ -167,11 +187,11 @@ static void aspeed_intc_enable_handler(AspeedINTCState *s, hwaddr offset,
     /* mask and unmask source interrupt */
     change = s->regs[reg] ^ data;
     if (change & data) {
-        s->mask[irq] &= ~change;
-        trace_aspeed_intc_unmask(name, change, s->mask[irq]);
+        s->mask[inpin_idx] &= ~change;
+        trace_aspeed_intc_unmask(name, change, s->mask[inpin_idx]);
     } else {
-        s->mask[irq] |= change;
-        trace_aspeed_intc_mask(name, change, s->mask[irq]);
+        s->mask[inpin_idx] |= change;
+        trace_aspeed_intc_mask(name, change, s->mask[inpin_idx]);
     }
 
     s->regs[reg] = data;
@@ -183,6 +203,8 @@ static void aspeed_intc_status_handler(AspeedINTCState *s, hwaddr offset,
     AspeedINTCClass *aic = ASPEED_INTC_GET_CLASS(s);
     const char *name = object_get_typename(OBJECT(s));
     uint32_t reg = offset >> 2;
+    int outpin_idx;
+    int inpin_idx;
     uint32_t irq;
 
     if (!data) {
@@ -191,11 +213,13 @@ static void aspeed_intc_status_handler(AspeedINTCState *s, hwaddr offset,
     }
 
     irq = (offset & 0x0f00) >> 8;
+    outpin_idx = irq;
+    inpin_idx = irq;
 
-    if (irq >= aic->num_inpins) {
+    if (inpin_idx >= aic->num_inpins) {
         qemu_log_mask(LOG_GUEST_ERROR,
                       "%s: Invalid input pin index: %d\n",
-                      __func__, irq);
+                      __func__, inpin_idx);
         return;
     }
 
@@ -214,21 +238,22 @@ static void aspeed_intc_status_handler(AspeedINTCState *s, hwaddr offset,
 
     /* All source ISR execution are done */
     if (!s->regs[reg]) {
-        trace_aspeed_intc_all_isr_done(name, irq);
-        if (s->pending[irq]) {
+        trace_aspeed_intc_all_isr_done(name, inpin_idx);
+        if (s->pending[inpin_idx]) {
             /*
              * handle pending source interrupt
              * notify firmware which source interrupt are pending
              * by setting status register
              */
-            s->regs[reg] = s->pending[irq];
-            s->pending[irq] = 0;
-            trace_aspeed_intc_trigger_irq(name, irq, s->regs[reg]);
-            aspeed_intc_update(s, irq, 1);
+            s->regs[reg] = s->pending[inpin_idx];
+            s->pending[inpin_idx] = 0;
+            trace_aspeed_intc_trigger_irq(name, inpin_idx, outpin_idx,
+                                          s->regs[reg]);
+            aspeed_intc_update(s, inpin_idx, outpin_idx, 1);
         } else {
             /* clear irq */
-            trace_aspeed_intc_clear_irq(name, irq, 0);
-            aspeed_intc_update(s, irq, 0);
+            trace_aspeed_intc_clear_irq(name, inpin_idx, outpin_idx, 0);
+            aspeed_intc_update(s, inpin_idx, outpin_idx, 0);
         }
     }
 }
diff --git a/hw/intc/trace-events b/hw/intc/trace-events
index e9ca34755e09..e97eea820b82 100644
--- a/hw/intc/trace-events
+++ b/hw/intc/trace-events
@@ -82,12 +82,12 @@ aspeed_vic_write(uint64_t offset, unsigned size, uint32_t data) "To 0x%" PRIx64
 # aspeed_intc.c
 aspeed_intc_read(const char *s, uint64_t offset, unsigned size, uint32_t value) "%s: From 0x%" PRIx64 " of size %u: 0x%" PRIx32
 aspeed_intc_write(const char *s, uint64_t offset, unsigned size, uint32_t data) "%s: To 0x%" PRIx64 " of size %u: 0x%" PRIx32
-aspeed_intc_set_irq(const char *s, int irq, int level) "%s: Set IRQ %d: %d"
-aspeed_intc_clear_irq(const char *s, int irq, int level) "%s: Clear IRQ %d: %d"
-aspeed_intc_update_irq(const char *s, int irq, int level) "%s: Update IRQ: %d: %d"
-aspeed_intc_pending_irq(const char *s, int irq, uint32_t value) "%s: Pending IRQ: %d: 0x%x"
-aspeed_intc_trigger_irq(const char *s, int irq, uint32_t value) "%s: Trigger IRQ: %d: 0x%x"
-aspeed_intc_all_isr_done(const char *s, int irq) "%s: All source ISR execution are done: %d"
+aspeed_intc_set_irq(const char *s, int inpin_idx, int level) "%s: Set IRQ %d: %d"
+aspeed_intc_clear_irq(const char *s, int inpin_idx, int outpin_idx, int level) "%s: Clear IRQ %d-%d: %d"
+aspeed_intc_update_irq(const char *s, int inpin_idx, int outpin_idx, int level) "%s: Update IRQ: %d-%d: %d"
+aspeed_intc_pending_irq(const char *s, int inpin_idx, uint32_t value) "%s: Pending IRQ: %d: 0x%x"
+aspeed_intc_trigger_irq(const char *s, int inpin_idx, int outpin_idx, uint32_t value) "%s: Trigger IRQ: %d-%d: 0x%x"
+aspeed_intc_all_isr_done(const char *s, int inpin_idx) "%s: All source ISR execution are done: %d"
 aspeed_intc_enable(const char *s, uint32_t value) "%s: Enable: 0x%x"
 aspeed_intc_select(const char *s, uint32_t value) "%s: Select: 0x%x"
 aspeed_intc_mask(const char *s, uint32_t change, uint32_t value) "%s: Mask: 0x%x: 0x%x"
-- 
2.48.1