[PATCH] cxl: Dump PSL_FIR1/2 registers on PSL9 error irq

[Vaibhav Jain]

For PSL9 currently we aren't dumping the PSL FIR1/2 registers when a
PSL error interrupt is triggered. Contents of these registers are
useful in debugging AFU issues.

This patch fixes issue by updating the cxl_native_err_irq_dump_regs()
to dump these regs on PSL error interrupt thereby bringing the
behavior in line with PSL on POWER-8.

Signed-off-by: Vaibhav Jain <vaib...@linux.vnet.ibm.com>
---
 drivers/misc/cxl/native.c | 13 +++++++++++--
 drivers/misc/cxl/pci.c    |  1 +
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/drivers/misc/cxl/native.c b/drivers/misc/cxl/native.c
index 4a82c313cf71..60b91e95821d 100644
--- a/drivers/misc/cxl/native.c
+++ b/drivers/misc/cxl/native.c
@@ -1261,8 +1261,17 @@ void cxl_native_err_irq_dump_regs(struct cxl *adapter)
 {
        u64 fir1, fir2;
 
-       fir1 = cxl_p1_read(adapter, CXL_PSL_FIR1);
-       fir2 = cxl_p1_read(adapter, CXL_PSL_FIR2);
+       if (cxl_is_power8()) {
+               fir1 = cxl_p1_read(adapter, CXL_PSL_FIR1);
+               fir2 = cxl_p1_read(adapter, CXL_PSL_FIR2);
+       } else if (cxl_is_power9()) {
+               fir1 = cxl_p1_read(adapter, CXL_PSL9_FIR1);
+               fir2 = cxl_p1_read(adapter, CXL_PSL9_FIR2);
+       } else {
+               /* Dont report garbage */
+               fir1 = fir2 = 0;
+               WARN_ON(1);
+       }
 
        dev_crit(&adapter->dev, "PSL_FIR1: 0x%016llx\nPSL_FIR2: 0x%016llx\n", 
fir1, fir2);
 }
diff --git a/drivers/misc/cxl/pci.c b/drivers/misc/cxl/pci.c
index d18b3d9292fd..597e145f38e3 100644
--- a/drivers/misc/cxl/pci.c
+++ b/drivers/misc/cxl/pci.c
@@ -1762,6 +1762,7 @@ static const struct cxl_service_layer_ops psl9_ops = {
        .debugfs_add_adapter_regs = cxl_debugfs_add_adapter_regs_psl9,
        .debugfs_add_afu_regs = cxl_debugfs_add_afu_regs_psl9,
        .psl_irq_dump_registers = cxl_native_irq_dump_regs_psl9,
+       .err_irq_dump_registers = cxl_native_err_irq_dump_regs,
        .debugfs_stop_trace = cxl_stop_trace_psl9,
        .write_timebase_ctrl = write_timebase_ctrl_psl9,
        .timebase_read = timebase_read_psl9,
-- 
2.13.5