void __iomem *base;
struct list_head task_busy_list;
u32 priority;
- bool atomic_exec;
};
struct cmdq_task {
cmdq_thread_invalidate_fetched_data(thread);
}
-static bool cmdq_command_is_wfe(u64 cmd)
-{
- u64 wfe_option = CMDQ_WFE_UPDATE | CMDQ_WFE_WAIT | CMDQ_WFE_WAIT_VALUE;
- u64 wfe_op = (u64)(CMDQ_CODE_WFE << CMDQ_OP_CODE_SHIFT) << 32;
- u64 wfe_mask = (u64)CMDQ_OP_CODE_MASK << 32 | 0xffffffff;
-
- return ((cmd & wfe_mask) == (wfe_op | wfe_option));
-}
-
-/* we assume tasks in the same display GCE thread are waiting the same event. */
-static void cmdq_task_remove_wfe(struct cmdq_task *task)
-{
- struct device *dev = task->cmdq->mbox.dev;
- u64 *base = task->pkt->va_base;
- int i;
-
- dma_sync_single_for_cpu(dev, task->pa_base, task->pkt->cmd_buf_size,
- DMA_TO_DEVICE);
- for (i = 0; i < CMDQ_NUM_CMD(task->pkt); i++)
- if (cmdq_command_is_wfe(base[i]))
- base[i] = (u64)CMDQ_JUMP_BY_OFFSET << 32 |
- CMDQ_JUMP_PASS;
- dma_sync_single_for_device(dev, task->pa_base, task->pkt->cmd_buf_size,
- DMA_TO_DEVICE);
-}
-
static bool cmdq_thread_is_in_wfe(struct cmdq_thread *thread)
{
return readl(thread->base + CMDQ_THR_WAIT_TOKEN) & CMDQ_THR_IS_WAITING;
}
-static void cmdq_thread_wait_end(struct cmdq_thread *thread,
- unsigned long end_pa)
-{
- struct device *dev = thread->chan->mbox->dev;
- unsigned long curr_pa;
-
- if (readl_poll_timeout_atomic(thread->base + CMDQ_THR_CURR_ADDR,
- curr_pa, curr_pa == end_pa, 1, 20))
- dev_err(dev, "GCE thread cannot run to end.\n");
-}
-
static void cmdq_task_exec_done(struct cmdq_task *task, enum cmdq_cb_status sta)
{
struct cmdq_task_cb *cb = &task->pkt->async_cb;
WARN_ON(cmdq_thread_suspend(cmdq, thread) < 0);
curr_pa = readl(thread->base + CMDQ_THR_CURR_ADDR);
end_pa = readl(thread->base + CMDQ_THR_END_ADDR);
-
- /*
- * Atomic execution should remove the following wfe, i.e. only
- * wait event at first task, and prevent to pause when running.
- */
- if (thread->atomic_exec) {
- /* GCE is executing if command is not WFE */
- if (!cmdq_thread_is_in_wfe(thread)) {
- cmdq_thread_resume(thread);
- cmdq_thread_wait_end(thread, end_pa);
- WARN_ON(cmdq_thread_suspend(cmdq, thread) < 0);
- /* set to this task directly */
- writel(task->pa_base,
- thread->base + CMDQ_THR_CURR_ADDR);
- } else {
- cmdq_task_insert_into_thread(task);
- cmdq_task_remove_wfe(task);
- smp_mb(); /* modify jump before enable thread */
- }
+ /* check boundary */
+ if (curr_pa == end_pa - CMDQ_INST_SIZE ||
+ curr_pa == end_pa) {
+ /* set to this task directly */
+ writel(task->pa_base,
+ thread->base + CMDQ_THR_CURR_ADDR);
} else {
- /* check boundary */
- if (curr_pa == end_pa - CMDQ_INST_SIZE ||
- curr_pa == end_pa) {
- /* set to this task directly */
- writel(task->pa_base,
- thread->base + CMDQ_THR_CURR_ADDR);
- } else {
- cmdq_task_insert_into_thread(task);
- smp_mb(); /* modify jump before enable thread */
- }
+ cmdq_task_insert_into_thread(task);
+ smp_mb(); /* modify jump before enable thread */
}
writel(task->pa_base + pkt->cmd_buf_size,
thread->base + CMDQ_THR_END_ADDR);
{
}
+static int cmdq_mbox_flush(struct mbox_chan *chan, unsigned long timeout)
+{
+ struct cmdq_thread *thread = (struct cmdq_thread *)chan->con_priv;
+ struct cmdq_task_cb *cb;
+ struct cmdq_cb_data data;
+ struct cmdq *cmdq = dev_get_drvdata(chan->mbox->dev);
+ struct cmdq_task *task, *tmp;
+ unsigned long flags;
+ u32 enable;
+
+ spin_lock_irqsave(&thread->chan->lock, flags);
+ if (list_empty(&thread->task_busy_list))
+ goto out;
+
+ WARN_ON(cmdq_thread_suspend(cmdq, thread) < 0);
+ if (!cmdq_thread_is_in_wfe(thread))
+ goto wait;
+
+ list_for_each_entry_safe(task, tmp, &thread->task_busy_list,
+ list_entry) {
+ cb = &task->pkt->async_cb;
+ if (cb->cb) {
+ data.sta = CMDQ_CB_ERROR;
+ data.data = cb->data;
+ cb->cb(data);
+ }
+ list_del(&task->list_entry);
+ kfree(task);
+ }
+
+ cmdq_thread_resume(thread);
+ cmdq_thread_disable(cmdq, thread);
+ clk_disable(cmdq->clock);
+
+out:
+ spin_unlock_irqrestore(&thread->chan->lock, flags);
+ return 0;
+
+wait:
+ cmdq_thread_resume(thread);
+ spin_unlock_irqrestore(&thread->chan->lock, flags);
+ if (readl_poll_timeout_atomic(thread->base + CMDQ_THR_ENABLE_TASK,
+ enable, enable == 0, 1, timeout)) {
+ dev_err(cmdq->mbox.dev, "Fail to wait GCE thread 0x%x done\n",
+ (u32)(thread->base - cmdq->base));
+
+ return -EFAULT;
+ }
+ return 0;
+}
+
static const struct mbox_chan_ops cmdq_mbox_chan_ops = {
.send_data = cmdq_mbox_send_data,
.startup = cmdq_mbox_startup,
.shutdown = cmdq_mbox_shutdown,
+ .flush = cmdq_mbox_flush,
};
static struct mbox_chan *cmdq_xlate(struct mbox_controller *mbox,
thread = (struct cmdq_thread *)mbox->chans[ind].con_priv;
thread->priority = sp->args[1];
- thread->atomic_exec = (sp->args[2] != 0);
thread->chan = &mbox->chans[ind];
return &mbox->chans[ind];
projects / linux-2.6-microblaze.git / blobdiff