nvdla: Replace deprecated nvhost_syncpt_* APIs

This commit replaces the deprecated nvhost_syncpt_*
functions with the equivalent host1x_syncpt_* APIs
throughout the NVDLA driver.
The following replacements were made:

- nvhost_get_syncpt_host_managed() →
   host1x_syncpt_alloc() + host1x_syncpt_id()
- nvhost_syncpt_put_ref_ext() →
   host1x_syncpt_put()
- nvhost_syncpt_incr_max_ext() →
   host1x_syncpt_incr_max()
- nvhost_syncpt_read_maxval() →
   host1x_syncpt_read_max()
- nvhost_syncpt_is_expired_ext() →
   host1x_syncpt_wait()
- nvhost_syncpt_set_min_update() →
   host1x_syncpt_read() + host1x_syncpt_incr()

Each replacement includes:
- Obtaining syncpoint handles when necessary with
   host1x_syncpt_get_by_id_noref()
- Proper error checking for null handles and return values
- Maintaining the emulation wrapper in nvdla_sync_syncpt_emu.c

Bug 4922416

Jira HOSTX-5963

Change-Id: I8ce4299f89a8938c07895656689a59cc20a097ec
Signed-off-by: Mainak Sen <msen@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3321364
Reviewed-by: Arvind M <am@nvidia.com>
GVS: buildbot_gerritrpt <buildbot_gerritrpt@nvidia.com>
Reviewed-by: Mitch Harwell <mharwell@nvidia.com>
Reviewed-by: Raghavendra Vishnu Kumar <rvk@nvidia.com>

drivers/video/tegra/host/nvdla/dla_queue.c

@@ -12,17 +12,89 @@
 #include <linux/vmalloc.h>
 #include <linux/dma-mapping.h>
 #include <linux/debugfs.h>
+#include <linux/dma-fence.h>
+#include <linux/workqueue.h>
 
 #include "port/nvdla_host_wrapper.h"
-
-#if IS_ENABLED(CONFIG_TEGRA_NVDLA_CHANNEL)
-#include "nvhost_job.h"
-#endif
-
 #include "dla_channel.h"
 #include "dla_queue.h"
 #include "nvdla_debug.h"
 
+#if IS_ENABLED(CONFIG_TEGRA_NVDLA_CHANNEL)
+#include "nvhost_job.h"
+
+/* Add host1x host1x_cb structures and functions needed for handling callbacks */
+struct nvdla_host1x_cb {
+	struct dma_fence_cb cb;
+	struct work_struct work;
+	void (*notifier)(void *data);
+	void *notifier_data;
+};
+
+static void nvdla_host1x_cb_func(struct dma_fence *f, struct dma_fence_cb *cb)
+{
+	struct nvdla_host1x_cb *host1x_cb;
+
+	host1x_cb = container_of(cb, struct nvdla_host1x_cb, cb);
+	schedule_work(&host1x_cb->work);
+	dma_fence_put(f);
+}
+
+static void nvdla_intr_do_work(struct work_struct *work)
+{
+	struct nvdla_host1x_cb *host1x_cb;
+
+	host1x_cb = container_of(work, struct nvdla_host1x_cb, work);
+	host1x_cb->notifier(host1x_cb->notifier_data);
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(6, 5, 0))
+	kfree_rcu_mightsleep(host1x_cb);
+#else
+	kfree_rcu(host1x_cb);
+#endif
+}
+
+static int nvdla_intr_register_notifier(struct platform_device *pdev,
+								u32 id, u32 thresh,
+								void (*callback)(void *data),
+								void *private_data)
+{
+	struct nvhost_device_data *pdata = platform_get_drvdata(pdev);
+	struct dma_fence *fence;
+	struct nvdla_host1x_cb *cb;
+	struct host1x_syncpt *sp;
+	int err;
+
+	sp = host1x_syncpt_get_by_id_noref(pdata->host1x, id);
+	if (!sp)
+		return -EINVAL;
+
+	fence = host1x_fence_create(sp, thresh, true);
+	if (IS_ERR(fence)) {
+		pr_err("error %d during construction of fence!",
+			(int)PTR_ERR(fence));
+		return PTR_ERR(fence);
+	}
+
+	cb = kzalloc(sizeof(*cb), GFP_KERNEL);
+	if (!cb) {
+		dma_fence_put(fence);
+		return -ENOMEM;
+	}
+
+	INIT_WORK(&cb->work, nvdla_intr_do_work);
+	cb->notifier = callback;
+	cb->notifier_data = private_data;
+
+	err = dma_fence_add_callback(fence, &cb->cb, nvdla_host1x_cb_func);
+	if (err < 0) {
+		dma_fence_put(fence);
+		kfree(cb);
+	}
+
+	return err;
+}
+#endif
+
 #define CMDBUF_SIZE	4096
 
 /**
@@ -553,7 +625,7 @@ int nvdla_queue_submit_to_host1x(struct nvdla_queue *queue,
 	*task_syncpt_threshold = job->sp->fence;
 
 	/* Register a callback function for releasing resources */
-	err = nvhost_intr_register_notifier(host1x_pdev,
+	err = nvdla_intr_register_notifier(host1x_pdev,
 					    queue->syncpt_id,
 					    job->sp->fence,
 					    queue_task_update, task);

drivers/video/tegra/host/nvdla/port/sync/nvdla_sync_syncpt.c

@@ -31,6 +31,14 @@ struct nvdla_sync_context {
 	dma_addr_t address;
 };
 
+static dma_addr_t nvdla_syncpt_address(struct platform_device *pdev, u32 syncpt_id)
+{
+	struct nvhost_device_data *pdata = platform_get_drvdata(pdev);
+	struct nvhost_syncpt_interface *syncpt_if = pdata->syncpt_unit_interface;
+
+	return syncpt_if->base + syncpt_if->page_size * syncpt_id;
+}
+
 struct nvdla_sync_device *nvdla_sync_device_create_syncpoint(
 	struct platform_device *pdev)
 {
@@ -52,7 +60,6 @@ struct nvdla_sync_device *nvdla_sync_device_create_syncpoint(
 		goto fail;
 	}
 
-	/* Replace nvhost_syncpt_unit_interface_init with host1x_syncpt_get_shim_info */
 	pdata = platform_get_drvdata(pdev);
 	syncpt_if = devm_kzalloc(&pdev->dev, sizeof(*syncpt_if), GFP_KERNEL);
 	if (!syncpt_if) {
@@ -142,7 +149,7 @@ dma_addr_t nvdla_sync_get_address_by_syncptid(
 	dma_addr_t address = 0ULL;
 
 	if (device != NULL)
-		address = nvhost_syncpt_address(device->pdev, syncptid);
+		address = nvdla_syncpt_address(device->pdev, syncptid);
 
 	return address;
 }
@@ -150,6 +157,8 @@ dma_addr_t nvdla_sync_get_address_by_syncptid(
 struct nvdla_sync_context *nvdla_sync_create(struct nvdla_sync_device *device)
 {
 	struct nvdla_sync_context *context = NULL;
+	struct host1x_syncpt *sp = NULL;
+	struct nvhost_device_data *pdata = NULL;
 
 	if ((device == NULL) || (device->pdev == NULL))
 		goto fail;
@@ -162,15 +171,23 @@ struct nvdla_sync_context *nvdla_sync_create(struct nvdla_sync_device *device)
 		goto fail;
 	}
 
-	context->syncptid =
-		nvhost_get_syncpt_host_managed(device->pdev, 0U, NULL);
-	if (context->syncptid == 0) {
-		nvdla_dbg_err(device->pdev, "Failed to get syncpoint ID\n");
+	pdata = platform_get_drvdata(device->pdev);
+	sp = host1x_syncpt_alloc(pdata->host1x,
+				0U, /* Not client managed */
+				dev_name(&device->pdev->dev));
+	if (!sp) {
+		nvdla_dbg_err(device->pdev, "Failed to allocate syncpoint\n");
 		goto free_context;
 	}
 
-	context->address =
-		nvhost_syncpt_address(device->pdev, context->syncptid);
+	context->syncptid = host1x_syncpt_id(sp);
+	if (context->syncptid == 0) {
+		nvdla_dbg_err(device->pdev, "Failed to get syncpoint ID\n");
+		host1x_syncpt_put(sp); /* Release the allocated syncpoint */
+		goto free_context;
+	}
+
+	context->address = nvdla_syncpt_address(device->pdev, context->syncptid);
 	context->device = device;
 
 	return context;
@@ -183,14 +200,21 @@ fail:
 
 void nvdla_sync_destroy(struct nvdla_sync_context *context)
 {
+	struct host1x_syncpt *sp = NULL;
+	struct nvhost_device_data *pdata;
+
 	if (context == NULL)
 		goto done;
 
 	if ((context->device == NULL) || (context->device->pdev == NULL))
 		goto free_context;
 
-	/* Release the syncpoint ID */
-	nvhost_syncpt_put_ref_ext(context->device->pdev, context->syncptid);
+	pdata = platform_get_drvdata(context->device->pdev);
+	sp = host1x_syncpt_get_by_id_noref(pdata->host1x, context->syncptid);
+	if (WARN_ON(!sp))
+		goto free_context;
+
+	host1x_syncpt_put(sp);
 
 free_context:
 	context->device = NULL;
@@ -213,13 +237,18 @@ uint32_t nvdla_sync_increment_max_value(struct nvdla_sync_context *context,
 	uint32_t increment)
 {
 	uint32_t maxval = 0U;
+	struct nvhost_device_data *pdata;
+	struct host1x_syncpt *sp;
 
 	if ((context == NULL) || (context->device == NULL))
 		goto fail;
 
-	maxval = nvhost_syncpt_incr_max_ext(context->device->pdev,
-				context->syncptid,
-				increment);
+	pdata = platform_get_drvdata(context->device->pdev);
+	sp = host1x_syncpt_get_by_id_noref(pdata->host1x, context->syncptid);
+	if (WARN_ON(!sp))
+		goto fail;
+
+	maxval = host1x_syncpt_incr_max(sp, increment);
 
 fail:
 	return maxval;
@@ -228,12 +257,18 @@ fail:
 uint32_t nvdla_sync_get_max_value(struct nvdla_sync_context *context)
 {
 	int32_t maxval = 0U;
+	struct nvhost_device_data *pdata;
+	struct host1x_syncpt *sp;
 
 	if ((context == NULL) || (context->device == NULL))
 		goto fail;
 
-	maxval = nvhost_syncpt_read_maxval(context->device->pdev,
-				context->syncptid);
+	pdata = platform_get_drvdata(context->device->pdev);
+	sp = host1x_syncpt_get_by_id_noref(pdata->host1x, context->syncptid);
+	if (WARN_ON(!sp))
+		goto fail;
+
+	maxval = host1x_syncpt_read_max(sp);
 
 fail:
 	return maxval;
@@ -246,6 +281,8 @@ int32_t nvdla_sync_wait(struct nvdla_sync_context *context,
 	int32_t err = 0;
 	int wait_complete;
 	struct nvdla_sync_device *device;
+	struct nvhost_device_data *pdata;
+	struct host1x_syncpt *sp;
 
 	if ((context == NULL) || (context->device == NULL)) {
 		err = -EINVAL;
@@ -254,10 +291,15 @@ int32_t nvdla_sync_wait(struct nvdla_sync_context *context,
 
 	device = context->device;
 	if (timeout == 0ULL) {
-		wait_complete = nvhost_syncpt_is_expired_ext(device->pdev,
-				context->syncptid,
-				threshold);
-		if (wait_complete == 0) {
+		pdata = platform_get_drvdata(device->pdev);
+		sp = host1x_syncpt_get_by_id_noref(pdata->host1x, context->syncptid);
+		if (WARN_ON(!sp)) {
+			err = -EINVAL;
+			goto fail;
+		}
+
+		wait_complete = (host1x_syncpt_wait(sp, threshold, 0, NULL) == 0);
+		if (!wait_complete) {
 			nvdla_dbg_err(device->pdev,
 				"Wait on sp[%u] for threshold[%u] timedout\n",
 				context->syncptid, threshold);
@@ -280,15 +322,28 @@ int32_t nvdla_sync_signal(struct nvdla_sync_context *context,
 	uint32_t signal_value)
 {
 	int err = 0;
+	struct nvhost_device_data *pdata;
+	struct host1x_syncpt *sp;
+	uint32_t cur;
 
 	if ((context == NULL) || (context->device == NULL)) {
 		err = -EINVAL;
 		goto fail;
 	}
 
-	nvhost_syncpt_set_min_update(context->device->pdev,
-		context->syncptid,
-		signal_value);
+	pdata = platform_get_drvdata(context->device->pdev);
+	sp = host1x_syncpt_get_by_id_noref(pdata->host1x, context->syncptid);
+	if (WARN_ON(!sp)) {
+		err = -EINVAL;
+		goto fail;
+	}
+
+	cur = host1x_syncpt_read(sp);
+	while (cur++ != signal_value)
+		host1x_syncpt_incr(sp);
+
+	/* Read back to ensure the value has been updated */
+	host1x_syncpt_read(sp);
 
 fail:
 	return err;