1 files changed, 362 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/tsg_gk20a.c b/drivers/gpu/nvgpu/gk20a/tsg_gk20a.c
new file mode 100644
index 00000000..636ee8a0
--- /dev/null
+++ b/drivers/gpu/nvgpu/gk20a/tsg_gk20a.c
@@ -0,0 +1,362 @@
+/*
+ * Copyright (c) 2014-2017, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <uapi/linux/nvgpu.h>
+
+#include <nvgpu/kmem.h>
+#include <nvgpu/log.h>
+
+#include "gk20a.h"
+#include "tsg_gk20a.h"
+
+bool gk20a_is_channel_marked_as_tsg(struct channel_gk20a *ch)
+{
+        return !(ch->tsgid == NVGPU_INVALID_TSG_ID);
+}
+
+int gk20a_enable_tsg(struct tsg_gk20a *tsg)
+{
+        struct gk20a *g = tsg->g;
+        struct channel_gk20a *ch;
+        bool is_next, is_ctx_reload;
+
+        gk20a_fifo_disable_tsg_sched(g, tsg);
+
+        /*
+         * Due to h/w bug that exists in Maxwell and Pascal,
+         * we first need to enable all channels with NEXT and CTX_RELOAD set,
+         * and then rest of the channels should be enabled
+         */
+        nvgpu_rwsem_down_read(&tsg->ch_list_lock);
+        nvgpu_list_for_each_entry(ch, &tsg->ch_list, channel_gk20a, ch_entry) {
+                is_next = gk20a_fifo_channel_status_is_next(g, ch->chid);
+                is_ctx_reload = gk20a_fifo_channel_status_is_ctx_reload(g, ch->chid);
+
+                if (is_next || is_ctx_reload)
+                        g->ops.fifo.enable_channel(ch);
+        }
+
+        nvgpu_list_for_each_entry(ch, &tsg->ch_list, channel_gk20a, ch_entry) {
+                is_next = gk20a_fifo_channel_status_is_next(g, ch->chid);
+                is_ctx_reload = gk20a_fifo_channel_status_is_ctx_reload(g, ch->chid);
+
+                if (is_next || is_ctx_reload)
+                        continue;
+
+                g->ops.fifo.enable_channel(ch);
+        }
+        nvgpu_rwsem_up_read(&tsg->ch_list_lock);
+
+        gk20a_fifo_enable_tsg_sched(g, tsg);
+
+        return 0;
+}
+
+int gk20a_disable_tsg(struct tsg_gk20a *tsg)
+{
+        struct gk20a *g = tsg->g;
+        struct channel_gk20a *ch;
+
+        nvgpu_rwsem_down_read(&tsg->ch_list_lock);
+        nvgpu_list_for_each_entry(ch, &tsg->ch_list, channel_gk20a, ch_entry) {
+                g->ops.fifo.disable_channel(ch);
+        }
+        nvgpu_rwsem_up_read(&tsg->ch_list_lock);
+
+        return 0;
+}
+
+static bool gk20a_is_channel_active(struct gk20a *g, struct channel_gk20a *ch)
+{
+        struct fifo_gk20a *f = &g->fifo;
+        struct fifo_runlist_info_gk20a *runlist;
+        unsigned int i;
+
+        for (i = 0; i < f->max_runlists; ++i) {
+                runlist = &f->runlist_info[i];
+                if (test_bit(ch->chid, runlist->active_channels))
+                        return true;
+        }
+
+        return false;
+}
+
+/*
+ * API to mark channel as part of TSG
+ *
+ * Note that channel is not runnable when we bind it to TSG
+ */
+int gk20a_tsg_bind_channel(struct tsg_gk20a *tsg,
+                        struct channel_gk20a *ch)
+{
+        gk20a_dbg_fn("");
+
+        /* check if channel is already bound to some TSG */
+        if (gk20a_is_channel_marked_as_tsg(ch)) {
+                return -EINVAL;
+        }
+
+        /* channel cannot be bound to TSG if it is already active */
+        if (gk20a_is_channel_active(tsg->g, ch)) {
+                return -EINVAL;
+        }
+
+        ch->tsgid = tsg->tsgid;
+
+        /* all the channel part of TSG should need to be same runlist_id */
+        if (tsg->runlist_id == FIFO_INVAL_TSG_ID)
+                tsg->runlist_id = ch->runlist_id;
+        else if (tsg->runlist_id != ch->runlist_id) {
+                nvgpu_err(tsg->g,
+                        "Error: TSG channel should be share same runlist ch[%d] tsg[%d]",
+                        ch->runlist_id, tsg->runlist_id);
+                return -EINVAL;
+        }
+
+        nvgpu_rwsem_down_write(&tsg->ch_list_lock);
+        nvgpu_list_add_tail(&ch->ch_entry, &tsg->ch_list);
+        nvgpu_rwsem_up_write(&tsg->ch_list_lock);
+
+        nvgpu_ref_get(&tsg->refcount);
+
+        gk20a_dbg(gpu_dbg_fn, "BIND tsg:%d channel:%d\n",
+                                        tsg->tsgid, ch->chid);
+
+        gk20a_dbg_fn("done");
+        return 0;
+}
+
+int gk20a_tsg_unbind_channel(struct channel_gk20a *ch)
+{
+        struct gk20a *g = ch->g;
+        struct tsg_gk20a *tsg = &g->fifo.tsg[ch->tsgid];
+        int err;
+
+        err = gk20a_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);
+                /* If channel unbind fails, channel is still part of runlist */
+                channel_gk20a_update_runlist(ch, false);
+
+                nvgpu_rwsem_down_write(&tsg->ch_list_lock);
+                nvgpu_list_del(&ch->ch_entry);
+                nvgpu_rwsem_up_write(&tsg->ch_list_lock);
+        }
+
+        nvgpu_ref_put(&tsg->refcount, gk20a_tsg_release);
+        ch->tsgid = NVGPU_INVALID_TSG_ID;
+
+        gk20a_dbg(gpu_dbg_fn, "UNBIND tsg:%d channel:%d\n",
+                                        tsg->tsgid, ch->chid);
+
+        return 0;
+}
+
+int gk20a_init_tsg_support(struct gk20a *g, u32 tsgid)
+{
+        struct tsg_gk20a *tsg = NULL;
+        int err;
+
+        if (tsgid >= g->fifo.num_channels)
+                return -EINVAL;
+
+        tsg = &g->fifo.tsg[tsgid];
+
+        tsg->in_use = false;
+        tsg->tsgid = tsgid;
+
+        nvgpu_init_list_node(&tsg->ch_list);
+        nvgpu_rwsem_init(&tsg->ch_list_lock);
+
+        nvgpu_init_list_node(&tsg->event_id_list);
+        err = nvgpu_mutex_init(&tsg->event_id_list_lock);
+        if (err) {
+                tsg->in_use = true; /* make this TSG unusable */
+                return err;
+        }
+
+        return 0;
+}
+
+int gk20a_tsg_set_runlist_interleave(struct tsg_gk20a *tsg, u32 level)
+{
+        struct gk20a *g = tsg->g;
+        int ret;
+
+        gk20a_dbg(gpu_dbg_sched, "tsgid=%u interleave=%u", tsg->tsgid, level);
+
+        switch (level) {
+        case NVGPU_FIFO_RUNLIST_INTERLEAVE_LEVEL_LOW:
+        case NVGPU_FIFO_RUNLIST_INTERLEAVE_LEVEL_MEDIUM:
+        case NVGPU_FIFO_RUNLIST_INTERLEAVE_LEVEL_HIGH:
+                ret = g->ops.fifo.set_runlist_interleave(g, tsg->tsgid,
+                                                        true, 0, level);
+                if (!ret)
+                        tsg->interleave_level = level;
+                break;
+        default:
+                ret = -EINVAL;
+                break;
+        }
+
+        return ret ? ret : g->ops.fifo.update_runlist(g, tsg->runlist_id, ~0, true, true);
+}
+
+int gk20a_tsg_set_timeslice(struct tsg_gk20a *tsg, u32 timeslice)
+{
+        struct gk20a *g = tsg->g;
+
+        gk20a_dbg(gpu_dbg_sched, "tsgid=%u timeslice=%u us", tsg->tsgid, timeslice);
+
+        return g->ops.fifo.tsg_set_timeslice(tsg, timeslice);
+}
+
+u32 gk20a_tsg_get_timeslice(struct tsg_gk20a *tsg)
+{
+        struct gk20a *g = tsg->g;
+
+        if (!tsg->timeslice_us)
+                return g->ops.fifo.default_timeslice_us(g);
+
+        return tsg->timeslice_us;
+}
+
+static void release_used_tsg(struct fifo_gk20a *f, struct tsg_gk20a *tsg)
+{
+        nvgpu_mutex_acquire(&f->tsg_inuse_mutex);
+        f->tsg[tsg->tsgid].in_use = false;
+        nvgpu_mutex_release(&f->tsg_inuse_mutex);
+}
+
+static struct tsg_gk20a *gk20a_tsg_acquire_unused_tsg(struct fifo_gk20a *f)
+{
+        struct tsg_gk20a *tsg = NULL;
+        unsigned int tsgid;
+
+        nvgpu_mutex_acquire(&f->tsg_inuse_mutex);
+        for (tsgid = 0; tsgid < f->num_channels; tsgid++) {
+                if (!f->tsg[tsgid].in_use) {
+                        f->tsg[tsgid].in_use = true;
+                        tsg = &f->tsg[tsgid];
+                        break;
+                }
+        }
+        nvgpu_mutex_release(&f->tsg_inuse_mutex);
+
+        return tsg;
+}
+
+struct tsg_gk20a *gk20a_tsg_open(struct gk20a *g)
+{
+        struct tsg_gk20a *tsg;
+        int err;
+
+        tsg = gk20a_tsg_acquire_unused_tsg(&g->fifo);
+        if (!tsg)
+                return NULL;
+
+        tsg->g = g;
+        tsg->num_active_channels = 0;
+        nvgpu_ref_init(&tsg->refcount);
+
+        tsg->tsg_gr_ctx = NULL;
+        tsg->vm = NULL;
+        tsg->interleave_level = NVGPU_FIFO_RUNLIST_INTERLEAVE_LEVEL_LOW;
+        tsg->timeslice_us = 0;
+        tsg->timeslice_timeout = 0;
+        tsg->timeslice_scale = 0;
+        tsg->runlist_id = ~0;
+        tsg->tgid = current->tgid;
+
+        if (g->ops.fifo.init_eng_method_buffers)
+                g->ops.fifo.init_eng_method_buffers(g, tsg);
+
+        if (g->ops.fifo.tsg_open) {
+                err = g->ops.fifo.tsg_open(tsg);
+                if (err) {
+                        nvgpu_err(g, "tsg %d fifo open failed %d",
+                                  tsg->tsgid, err);
+                        goto clean_up;
+                }
+        }
+
+        gk20a_dbg(gpu_dbg_fn, "tsg opened %d\n", tsg->tsgid);
+
+        return tsg;
+
+clean_up:
+        nvgpu_ref_put(&tsg->refcount, gk20a_tsg_release);
+        return NULL;
+}
+
+void gk20a_tsg_release(struct nvgpu_ref *ref)
+{
+        struct tsg_gk20a *tsg = container_of(ref, struct tsg_gk20a, refcount);
+        struct gk20a *g = tsg->g;
+        struct gk20a_event_id_data *event_id_data, *event_id_data_temp;
+
+        if (tsg->tsg_gr_ctx) {
+                gr_gk20a_free_tsg_gr_ctx(tsg);
+                tsg->tsg_gr_ctx = NULL;
+        }
+
+        if (g->ops.fifo.deinit_eng_method_buffers)
+                g->ops.fifo.deinit_eng_method_buffers(g, tsg);
+
+        if (tsg->vm) {
+                nvgpu_vm_put(tsg->vm);
+                tsg->vm = NULL;
+        }
+
+        /* unhook all events created on this TSG */
+        nvgpu_mutex_acquire(&tsg->event_id_list_lock);
+        nvgpu_list_for_each_entry_safe(event_id_data, event_id_data_temp,
+                                &tsg->event_id_list,
+                                gk20a_event_id_data,
+                                event_id_node) {
+                nvgpu_list_del(&event_id_data->event_id_node);
+        }
+        nvgpu_mutex_release(&tsg->event_id_list_lock);
+
+        release_used_tsg(&g->fifo, tsg);
+
+        tsg->runlist_id = ~0;
+
+        gk20a_dbg(gpu_dbg_fn, "tsg released %d\n", tsg->tsgid);
+        gk20a_put(g);
+}
+
+struct tsg_gk20a *tsg_gk20a_from_ch(struct channel_gk20a *ch)
+{
+        struct tsg_gk20a *tsg = NULL;
+
+        if (gk20a_is_channel_marked_as_tsg(ch)) {
+                struct gk20a *g = ch->g;
+                struct fifo_gk20a *f = &g->fifo;
+                tsg = &f->tsg[ch->tsgid];
+        }
+
+        return tsg;
+}