cxl: Add tracepoints around the cxl hcall

To ease debugging, add a few tracepoints around the cxl hcalls.

Co-authored-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Signed-off-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Signed-off-by: Christophe Lombard <clombard@linux.vnet.ibm.com>
Reviewed-by: Manoj Kumar <manoj@linux.vnet.ibm.com>
Acked-by: Ian Munsie <imunsie@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

2 files changed, 202 insertions, 0 deletions

diff --git a/drivers/misc/cxl/hcalls.c b/drivers/misc/cxl/hcalls.c
index 24131e2537c5..d6d11f4056d7 100644
--- a/drivers/misc/cxl/hcalls.c
+++ b/drivers/misc/cxl/hcalls.c
@@ -13,6 +13,7 @@
 #include <linux/delay.h>
 #include <asm/byteorder.h>
 #include "hcalls.h"
+#include "trace.h"
 
 #define CXL_HCALL_TIMEOUT 60000
 #define CXL_HCALL_TIMEOUT_DOWNLOAD 120000
@@ -141,6 +142,7 @@ long cxl_h_attach_process(u64 unit_address,
         CXL_H_WAIT_UNTIL_DONE(rc, retbuf, H_ATTACH_CA_PROCESS, unit_address, virt_to_phys(element));
         _PRINT_MSG(rc, "cxl_h_attach_process(%#.16llx, %#.16lx): %li\n",
                 unit_address, virt_to_phys(element), rc);
+        trace_cxl_hcall_attach(unit_address, virt_to_phys(element), retbuf[0], retbuf[1], retbuf[2], rc);
 
         pr_devel("token: 0x%.8lx mmio_addr: 0x%lx mmio_size: 0x%lx\nProcess Element Structure:\n",
                 retbuf[0], retbuf[1], retbuf[2]);
@@ -180,6 +182,7 @@ long cxl_h_detach_process(u64 unit_address, u64 process_token)
 
         CXL_H_WAIT_UNTIL_DONE(rc, retbuf, H_DETACH_CA_PROCESS, unit_address, process_token);
         _PRINT_MSG(rc, "cxl_h_detach_process(%#.16llx, 0x%.8llx): %li\n", unit_address, process_token, rc);
+        trace_cxl_hcall_detach(unit_address, process_token, rc);
 
         switch (rc) {
         case H_SUCCESS:       /* The process was detached from the coherent platform function */
@@ -212,6 +215,7 @@ static long cxl_h_control_function(u64 unit_address, u64 op,
         CXL_H9_WAIT_UNTIL_DONE(rc, retbuf, H_CONTROL_CA_FUNCTION, unit_address, op, p1, p2, p3, p4);
         _PRINT_MSG(rc, "cxl_h_control_function(%#.16llx, %s(%#llx, %#llx, %#llx, %#llx, R4: %#lx)): %li\n",
                 unit_address, OP_STR_AFU(op), p1, p2, p3, p4, retbuf[0], rc);
+        trace_cxl_hcall_control_function(unit_address, OP_STR_AFU(op), p1, p2, p3, p4, retbuf[0], rc);
 
         switch (rc) {
         case H_SUCCESS:       /* The operation is completed for the coherent platform function */
@@ -405,6 +409,7 @@ long cxl_h_collect_int_info(u64 unit_address, u64 process_token,
                         unit_address, process_token);
         _PRINT_MSG(rc, "cxl_h_collect_int_info(%#.16llx, 0x%llx): %li\n",
                 unit_address, process_token, rc);
+        trace_cxl_hcall_collect_int_info(unit_address, process_token, rc);
 
         switch (rc) {
         case H_SUCCESS:     /* The interrupt info is returned in return registers. */
@@ -448,6 +453,8 @@ long cxl_h_control_faults(u64 unit_address, u64 process_token,
         _PRINT_MSG(rc, "cxl_h_control_faults(%#.16llx, 0x%llx, %#llx, %#llx): %li (%#lx)\n",
                 unit_address, process_token, control_mask, reset_mask,
                 rc, retbuf[0]);
+        trace_cxl_hcall_control_faults(unit_address, process_token,
+                                control_mask, reset_mask, retbuf[0], rc);
 
         switch (rc) {
         case H_SUCCESS:    /* Faults were successfully controlled for the function. */
@@ -481,6 +488,7 @@ static long cxl_h_control_facility(u64 unit_address, u64 op,
         CXL_H9_WAIT_UNTIL_DONE(rc, retbuf, H_CONTROL_CA_FACILITY, unit_address, op, p1, p2, p3, p4);
         _PRINT_MSG(rc, "cxl_h_control_facility(%#.16llx, %s(%#llx, %#llx, %#llx, %#llx, R4: %#lx)): %li\n",
                 unit_address, OP_STR_CONTROL_ADAPTER(op), p1, p2, p3, p4, retbuf[0], rc);
+        trace_cxl_hcall_control_facility(unit_address, OP_STR_CONTROL_ADAPTER(op), p1, p2, p3, p4, retbuf[0], rc);
 
         switch (rc) {
         case H_SUCCESS:       /* The operation is completed for the coherent platform facility */
@@ -587,6 +595,7 @@ static long cxl_h_download_facility(u64 unit_address, u64 op,
         }
         _PRINT_MSG(rc, "cxl_h_download_facility(%#.16llx, %s(%#llx, %#llx), %#lx): %li\n",
                  unit_address, OP_STR_DOWNLOAD_ADAPTER(op), list_address, num, retbuf[0], rc);
+        trace_cxl_hcall_download_facility(unit_address, OP_STR_DOWNLOAD_ADAPTER(op), list_address, num, retbuf[0], rc);
 
         switch (rc) {
         case H_SUCCESS:       /* The operation is completed for the coherent platform facility */
diff --git a/drivers/misc/cxl/trace.h b/drivers/misc/cxl/trace.h
index 6e1e2adfba8e..751d6119683e 100644
--- a/drivers/misc/cxl/trace.h
+++ b/drivers/misc/cxl/trace.h
@@ -450,6 +450,199 @@ DEFINE_EVENT(cxl_pe_class, cxl_slbia,
         TP_ARGS(ctx)
 );
 
+TRACE_EVENT(cxl_hcall,
+        TP_PROTO(u64 unit_address, u64 process_token, long rc),
+
+        TP_ARGS(unit_address, process_token, rc),
+
+        TP_STRUCT__entry(
+                __field(u64, unit_address)
+                __field(u64, process_token)
+                __field(long, rc)
+        ),
+
+        TP_fast_assign(
+                __entry->unit_address = unit_address;
+                __entry->process_token = process_token;
+                __entry->rc = rc;
+        ),
+
+        TP_printk("unit_address=0x%016llx process_token=0x%016llx rc=%li",
+                __entry->unit_address,
+                __entry->process_token,
+                __entry->rc
+        )
+);
+
+TRACE_EVENT(cxl_hcall_control,
+        TP_PROTO(u64 unit_address, char *fct, u64 p1, u64 p2, u64 p3,
+        u64 p4, unsigned long r4, long rc),
+
+        TP_ARGS(unit_address, fct, p1, p2, p3, p4, r4, rc),
+
+        TP_STRUCT__entry(
+                __field(u64, unit_address)
+                __field(char *, fct)
+                __field(u64, p1)
+                __field(u64, p2)
+                __field(u64, p3)
+                __field(u64, p4)
+                __field(unsigned long, r4)
+                __field(long, rc)
+        ),
+
+        TP_fast_assign(
+                __entry->unit_address = unit_address;
+                __entry->fct = fct;
+                __entry->p1 = p1;
+                __entry->p2 = p2;
+                __entry->p3 = p3;
+                __entry->p4 = p4;
+                __entry->r4 = r4;
+                __entry->rc = rc;
+        ),
+
+        TP_printk("unit_address=%#.16llx %s(%#llx, %#llx, %#llx, %#llx, R4: %#lx)): %li",
+                __entry->unit_address,
+                __entry->fct,
+                __entry->p1,
+                __entry->p2,
+                __entry->p3,
+                __entry->p4,
+                __entry->r4,
+                __entry->rc
+        )
+);
+
+TRACE_EVENT(cxl_hcall_attach,
+        TP_PROTO(u64 unit_address, u64 phys_addr, unsigned long process_token,
+                unsigned long mmio_addr, unsigned long mmio_size, long rc),
+
+        TP_ARGS(unit_address, phys_addr, process_token,
+                mmio_addr, mmio_size, rc),
+
+        TP_STRUCT__entry(
+                __field(u64, unit_address)
+                __field(u64, phys_addr)
+                __field(unsigned long, process_token)
+                __field(unsigned long, mmio_addr)
+                __field(unsigned long, mmio_size)
+                __field(long, rc)
+        ),
+
+        TP_fast_assign(
+                __entry->unit_address = unit_address;
+                __entry->phys_addr = phys_addr;
+                __entry->process_token = process_token;
+                __entry->mmio_addr = mmio_addr;
+                __entry->mmio_size = mmio_size;
+                __entry->rc = rc;
+        ),
+
+        TP_printk("unit_address=0x%016llx phys_addr=0x%016llx "
+                "token=0x%.8lx mmio_addr=0x%lx mmio_size=0x%lx rc=%li",
+                __entry->unit_address,
+                __entry->phys_addr,
+                __entry->process_token,
+                __entry->mmio_addr,
+                __entry->mmio_size,
+                __entry->rc
+        )
+);
+
+DEFINE_EVENT(cxl_hcall, cxl_hcall_detach,
+        TP_PROTO(u64 unit_address, u64 process_token, long rc),
+        TP_ARGS(unit_address, process_token, rc)
+);
+
+DEFINE_EVENT(cxl_hcall_control, cxl_hcall_control_function,
+        TP_PROTO(u64 unit_address, char *fct, u64 p1, u64 p2, u64 p3,
+        u64 p4, unsigned long r4, long rc),
+        TP_ARGS(unit_address, fct, p1, p2, p3, p4, r4, rc)
+);
+
+DEFINE_EVENT(cxl_hcall, cxl_hcall_collect_int_info,
+        TP_PROTO(u64 unit_address, u64 process_token, long rc),
+        TP_ARGS(unit_address, process_token, rc)
+);
+
+TRACE_EVENT(cxl_hcall_control_faults,
+        TP_PROTO(u64 unit_address, u64 process_token,
+                u64 control_mask, u64 reset_mask, unsigned long r4,
+                long rc),
+
+        TP_ARGS(unit_address, process_token,
+                control_mask, reset_mask, r4, rc),
+
+        TP_STRUCT__entry(
+                __field(u64, unit_address)
+                __field(u64, process_token)
+                __field(u64, control_mask)
+                __field(u64, reset_mask)
+                __field(unsigned long, r4)
+                __field(long, rc)
+        ),
+
+        TP_fast_assign(
+                __entry->unit_address = unit_address;
+                __entry->process_token = process_token;
+                __entry->control_mask = control_mask;
+                __entry->reset_mask = reset_mask;
+                __entry->r4 = r4;
+                __entry->rc = rc;
+        ),
+
+        TP_printk("unit_address=0x%016llx process_token=0x%llx "
+                "control_mask=%#llx reset_mask=%#llx r4=%#lx rc=%li",
+                __entry->unit_address,
+                __entry->process_token,
+                __entry->control_mask,
+                __entry->reset_mask,
+                __entry->r4,
+                __entry->rc
+        )
+);
+
+DEFINE_EVENT(cxl_hcall_control, cxl_hcall_control_facility,
+        TP_PROTO(u64 unit_address, char *fct, u64 p1, u64 p2, u64 p3,
+        u64 p4, unsigned long r4, long rc),
+        TP_ARGS(unit_address, fct, p1, p2, p3, p4, r4, rc)
+);
+
+TRACE_EVENT(cxl_hcall_download_facility,
+        TP_PROTO(u64 unit_address, char *fct, u64 list_address, u64 num,
+        unsigned long r4, long rc),
+
+        TP_ARGS(unit_address, fct, list_address, num, r4, rc),
+
+        TP_STRUCT__entry(
+                __field(u64, unit_address)
+                __field(char *, fct)
+                __field(u64, list_address)
+                __field(u64, num)
+                __field(unsigned long, r4)
+                __field(long, rc)
+        ),
+
+        TP_fast_assign(
+                __entry->unit_address = unit_address;
+                __entry->fct = fct;
+                __entry->list_address = list_address;
+                __entry->num = num;
+                __entry->r4 = r4;
+                __entry->rc = rc;
+        ),
+
+        TP_printk("%#.16llx, %s(%#llx, %#llx), %#lx): %li",
+                __entry->unit_address,
+                __entry->fct,
+                __entry->list_address,
+                __entry->num,
+                __entry->r4,
+                __entry->rc
+        )
+);
+
 #endif /* _CXL_TRACE_H */
 
 /* This part must be outside protection */