Dump FIFO values if could not find send window and print CRB for
debugging.
Signed-off-by: Sukadev Bhattiprolu <suka...@linux.vnet.ibm.com>
Signed-off-by: Haren Myneni <ha...@us.ibm.com>
---
arch/powerpc/platforms/powernv/vas-fault.c | 40 ++++++++++++++++++++++++++++++
1 file changed, 40 insertions(+)
diff --git a/arch/powerpc/platforms/powernv/vas-fault.c
b/arch/powerpc/platforms/powernv/vas-fault.c
index dd27649..ad594c8 100644
--- a/arch/powerpc/platforms/powernv/vas-fault.c
+++ b/arch/powerpc/platforms/powernv/vas-fault.c
@@ -36,6 +36,27 @@ void vas_wakeup_fault_handler(int virq, void *arg)
wake_up(&vinst->fault_wq);
}
+static void dump_crb(struct coprocessor_request_block *crb)
+{
+ struct data_descriptor_entry *dde;
+ struct nx_fault_stamp *nx;
+
+ dde = &crb->source;
+ pr_devel("SrcDDE: addr 0x%llx, len %d, count %d, idx %d, flags %d\n",
+ be64_to_cpu(dde->address), be32_to_cpu(dde->length),
+ dde->count, dde->index, dde->flags);
+
+ dde = &crb->target;
+ pr_devel("TgtDDE: addr 0x%llx, len %d, count %d, idx %d, flags %d\n",
+ be64_to_cpu(dde->address), be32_to_cpu(dde->length),
+ dde->count, dde->index, dde->flags);
+
+ nx = &crb->stamp.nx;
+ pr_devel("NX Stamp: PSWID 0x%x, FSA 0x%llx, flags 0x%x, FS 0x%x\n",
+ be32_to_cpu(nx->pswid), crb_nx_fault_addr(crb),
+ nx->flags, be32_to_cpu(nx->fault_status));
+}
+
static void notify_process(pid_t pid, u64 fault_addr)
{
int rc;
@@ -154,6 +175,23 @@ static void update_csb(struct vas_window *window,
}
}
+static void dump_fifo(struct vas_instance *vinst)
+{
+ int i;
+ unsigned long *fifo = vinst->fault_fifo;
+
+ pr_err("Fault fifo size %d, max crbs %d, crb size %lu\n",
+ vinst->fault_fifo_size,
+ vinst->fault_fifo_size / CRB_SIZE,
+ sizeof(struct coprocessor_request_block));
+
+ pr_err("Fault FIFO Dump:\n");
+ for (i = 0; i < 64; i += 4, fifo += 4) {
+ pr_err("[%.3d, %p]: 0x%.16lx 0x%.16lx 0x%.16lx 0x%.16lx\n",
+ i, fifo, *fifo, *(fifo+1), *(fifo+2), *(fifo+3));
+ }
+}
+
/*
* Process CRBs that we receive on the fault window.
*/
@@ -211,6 +249,7 @@ static void process_fault_crbs(struct vas_instance *vinst)
vinst->fault_crbs,
atomic_read(&vinst->pending_fault));
+ dump_crb(crb);
window = vas_pswid_to_window(vinst, crb_nx_pswid(crb));
if (IS_ERR(window)) {
@@ -220,6 +259,7 @@ static void process_fault_crbs(struct vas_instance *vinst)
* even clean it up (return credit).
* But we should not get here.
*/
+ dump_fifo(vinst);
pr_err("VAS[%d] fault_fifo %p, fifo %p, pswid 0x%x,
fault_crbs %d, pending %d bad CRB?\n",
vinst->vas_id, vinst->fault_fifo, fifo,
crb_nx_pswid(crb), vinst->fault_crbs,
--
1.8.3.1
