gpu: nvgpu: replace tsgid input variable with pointer to a struct tsg_gk20a

replace tsgid with a pointer to a struct tsg_gk20a in the function
gk20a_fifo_tsg_abort(). gk20a_fifo_tsg_abort needs to enumerate through
all the channels within the tsg as well as pass the tsg pointer to
other functions, qualifying the need to use a pointer instead as an
input parameter.

Jira NVGPU-1461

Change-Id: I59cec05d5d778f733d0c3e9ffadf46e74e249080
Signed-off-by: Debarshi Dutta <ddutta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1956567
(cherry picked from commit e5bebd880f28fe719c5e01e165fb189e7cafee01
in dev-kernel)
Reviewed-on: https://git-master.nvidia.com/r/2013724
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Bibek Basu <bbasu@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

2 files changed, 12 insertions, 4 deletions

diff --git a/drivers/gpu/nvgpu/common/fifo/channel.c b/drivers/gpu/nvgpu/common/fifo/channel.c
index 45c02a75..6ac8e508 100644
--- a/drivers/gpu/nvgpu/common/fifo/channel.c
+++ b/drivers/gpu/nvgpu/common/fifo/channel.c
@@ -214,10 +214,12 @@ void gk20a_channel_abort_clean_up(struct channel_gk20a *ch)
 
 void gk20a_channel_abort(struct channel_gk20a *ch, bool channel_preempt)
 {
+        struct tsg_gk20a *tsg = tsg_gk20a_from_ch(ch);
+
         nvgpu_log_fn(ch->g, " ");
 
-        if (gk20a_is_channel_marked_as_tsg(ch)) {
-                return gk20a_fifo_abort_tsg(ch->g, ch->tsgid, channel_preempt);
+        if (tsg != NULL) {
+                return gk20a_fifo_abort_tsg(ch->g, tsg, channel_preempt);
         }
 
         /* make sure new kickoffs are prevented */
diff --git a/drivers/gpu/nvgpu/common/fifo/tsg.c b/drivers/gpu/nvgpu/common/fifo/tsg.c
index 0892e8bf..9790553f 100644
--- a/drivers/gpu/nvgpu/common/fifo/tsg.c
+++ b/drivers/gpu/nvgpu/common/fifo/tsg.c
@@ -20,6 +20,7 @@
  * DEALINGS IN THE SOFTWARE.
  */
 
+#include <nvgpu/bug.h>
 #include <nvgpu/kmem.h>
 #include <nvgpu/log.h>
 #include <nvgpu/os_sched.h>
@@ -149,18 +150,23 @@ int gk20a_tsg_bind_channel(struct tsg_gk20a *tsg,
         return 0;
 }
 
+/* The caller must ensure that channel belongs to a tsg */
 int gk20a_tsg_unbind_channel(struct channel_gk20a *ch)
 {
         struct gk20a *g = ch->g;
-        struct tsg_gk20a *tsg = &g->fifo.tsg[ch->tsgid];
+        struct tsg_gk20a *tsg = tsg_gk20a_from_ch(ch);
         int err;
 
+        if (tsg == NULL) {
+                return -EINVAL;
+        }
+
         err = g->ops.fifo.tsg_unbind_channel(ch);
         if (err) {
                 nvgpu_err(g, "Channel %d unbind failed, tearing down TSG %d",
                         ch->chid, tsg->tsgid);
 
-                gk20a_fifo_abort_tsg(ch->g, ch->tsgid, true);
+                gk20a_fifo_abort_tsg(ch->g, tsg, true);
                 /* If channel unbind fails, channel is still part of runlist */
                 channel_gk20a_update_runlist(ch, false);