From: Zhao Yan <yan.y.zhao@intel.com>
Date: Tue, 8 May 2018 14:52:50 +0800
Subject: drm/i915/gvt: let force_to_nonpriv cmd handler only valid for LRI cmd
Git-commit: cb8ba171ae6c1e4f5fa027162c06d50fc2b43055
Patch-mainline: v4.18-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
the cmd_reg_handler() is called by cmds LRM, PIPE_CTRL, SRM...
for LRM, SRM, we cannot get write data in a simple way.
On other side, the force_to_nonpriv reigsters will only be written in LRI
in current drivers. so we don't want to bother the handler to handle those
memory access cmds, just leave a print message here.
Signed-off-by: Zhao Yan <yan.y.zhao@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/i915/gvt/cmd_parser.c | 14 +++++++++++---
1 file changed, 11 insertions(+), 3 deletions(-)
--- a/drivers/gpu/drm/i915/gvt/cmd_parser.c
+++ b/drivers/gpu/drm/i915/gvt/cmd_parser.c
@@ -813,14 +813,22 @@ static inline bool is_force_nonpriv_mmio
}
static int force_nonpriv_reg_handler(struct parser_exec_state *s,
- unsigned int offset, unsigned int index)
+ unsigned int offset, unsigned int index, char *cmd)
{
struct intel_gvt *gvt = s->vgpu->gvt;
- unsigned int data = cmd_val(s, index + 1);
+ unsigned int data;
u32 ring_base;
u32 nopid;
struct drm_i915_private *dev_priv = s->vgpu->gvt->dev_priv;
+ if (!strcmp(cmd, "lri"))
+ data = cmd_val(s, index + 1);
+ else {
+ gvt_err("Unexpected forcenonpriv 0x%x write from cmd %s\n",
+ offset, cmd);
+ return -EINVAL;
+ }
+
ring_base = dev_priv->engine[s->ring_id]->mmio_base;
nopid = i915_mmio_reg_offset(RING_NOPID(ring_base));
@@ -877,7 +885,7 @@ static int cmd_reg_handler(struct parser
return -EINVAL;
if (is_force_nonpriv_mmio(offset) &&
- force_nonpriv_reg_handler(s, offset, index))
+ force_nonpriv_reg_handler(s, offset, index, cmd))
return -EPERM;
if (offset == i915_mmio_reg_offset(DERRMR) ||