gpu: nvgpu: Remove support for channel events

Remove support for events for bare channels. All users have already
moved to TSGs and TSG events.

Bug 1842197

Change-Id: Ib3ff68134ad9515ee761d0f0e19a3150a0b744ab
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1618906
Reviewed-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 76 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/common/linux/ioctl_tsg.c b/drivers/gpu/nvgpu/common/linux/ioctl_tsg.c
index b17d7e74..445199c2 100644
--- a/drivers/gpu/nvgpu/common/linux/ioctl_tsg.c
+++ b/drivers/gpu/nvgpu/common/linux/ioctl_tsg.c
@@ -18,6 +18,7 @@
 #include <linux/file.h>
 #include <linux/cdev.h>
 #include <linux/uaccess.h>
+#include <linux/poll.h>
 #include <uapi/linux/nvgpu.h>
 #include <linux/anon_inodes.h>
 
@@ -79,6 +80,30 @@ static int gk20a_tsg_get_event_data_from_id(struct tsg_gk20a *tsg,
         }
 }
 
+/*
+ * Convert common event_id of the form NVGPU_EVENT_ID_* to Linux specific
+ * event_id of the form NVGPU_IOCTL_CHANNEL_EVENT_ID_* which is used in IOCTLs
+ */
+static u32 nvgpu_event_id_to_ioctl_channel_event_id(u32 event_id)
+{
+        switch (event_id) {
+        case NVGPU_EVENT_ID_BPT_INT:
+                return NVGPU_IOCTL_CHANNEL_EVENT_ID_BPT_INT;
+        case NVGPU_EVENT_ID_BPT_PAUSE:
+                return NVGPU_IOCTL_CHANNEL_EVENT_ID_BPT_PAUSE;
+        case NVGPU_EVENT_ID_BLOCKING_SYNC:
+                return NVGPU_IOCTL_CHANNEL_EVENT_ID_BLOCKING_SYNC;
+        case NVGPU_EVENT_ID_CILP_PREEMPTION_STARTED:
+                return NVGPU_IOCTL_CHANNEL_EVENT_ID_CILP_PREEMPTION_STARTED;
+        case NVGPU_EVENT_ID_CILP_PREEMPTION_COMPLETE:
+                return NVGPU_IOCTL_CHANNEL_EVENT_ID_CILP_PREEMPTION_COMPLETE;
+        case NVGPU_EVENT_ID_GR_SEMAPHORE_WRITE_AWAKEN:
+                return NVGPU_IOCTL_CHANNEL_EVENT_ID_GR_SEMAPHORE_WRITE_AWAKEN;
+        }
+
+        return NVGPU_IOCTL_CHANNEL_EVENT_ID_MAX;
+}
+
 void gk20a_tsg_event_id_post_event(struct tsg_gk20a *tsg,
                                        int __event_id)
 {
@@ -107,6 +132,57 @@ void gk20a_tsg_event_id_post_event(struct tsg_gk20a *tsg,
         nvgpu_mutex_release(&event_id_data->lock);
 }
 
+static unsigned int gk20a_event_id_poll(struct file *filep, poll_table *wait)
+{
+        unsigned int mask = 0;
+        struct gk20a_event_id_data *event_id_data = filep->private_data;
+        struct gk20a *g = event_id_data->g;
+        u32 event_id = event_id_data->event_id;
+        struct tsg_gk20a *tsg = g->fifo.tsg + event_id_data->id;
+
+        gk20a_dbg(gpu_dbg_fn | gpu_dbg_info, "");
+
+        poll_wait(filep, &event_id_data->event_id_wq.wq, wait);
+
+        nvgpu_mutex_acquire(&event_id_data->lock);
+
+        if (event_id_data->event_posted) {
+                gk20a_dbg_info(
+                        "found pending event_id=%d on TSG=%d\n",
+                        event_id, tsg->tsgid);
+                mask = (POLLPRI | POLLIN);
+                event_id_data->event_posted = false;
+        }
+
+        nvgpu_mutex_release(&event_id_data->lock);
+
+        return mask;
+}
+
+static int gk20a_event_id_release(struct inode *inode, struct file *filp)
+{
+        struct gk20a_event_id_data *event_id_data = filp->private_data;
+        struct gk20a *g = event_id_data->g;
+        struct tsg_gk20a *tsg = g->fifo.tsg + event_id_data->id;
+
+        nvgpu_mutex_acquire(&tsg->event_id_list_lock);
+        nvgpu_list_del(&event_id_data->event_id_node);
+        nvgpu_mutex_release(&tsg->event_id_list_lock);
+
+        nvgpu_mutex_destroy(&event_id_data->lock);
+        gk20a_put(g);
+        nvgpu_kfree(g, event_id_data);
+        filp->private_data = NULL;
+
+        return 0;
+}
+
+const struct file_operations gk20a_event_id_ops = {
+        .owner = THIS_MODULE,
+        .poll = gk20a_event_id_poll,
+        .release = gk20a_event_id_release,
+};
+
 static int gk20a_tsg_event_id_enable(struct tsg_gk20a *tsg,
                                          int event_id,
                                          int *fd)
@@ -152,7 +228,6 @@ static int gk20a_tsg_event_id_enable(struct tsg_gk20a *tsg,
         }
         event_id_data->g = g;
         event_id_data->id = tsg->tsgid;
-        event_id_data->is_tsg = true;
         event_id_data->event_id = event_id;
 
         nvgpu_cond_init(&event_id_data->event_id_wq);