tegra_hv: stop compiling unused APIs for prod kernel

- stop compiling unused APIs for prod kernel
- remove APIs having just function declaration

Jira ESLC-8593

Change-Id: I8acd01a88e0ea4c3792d7080f685bcac9c9cf559
Signed-off-by: Manish Bhardwaj <mbhardwaj@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3363569
Reviewed-by: Suresh Venkatachalam <skathirampat@nvidia.com>
GVS: buildbot_gerritrpt <buildbot_gerritrpt@nvidia.com>
Reviewed-by: Sumeet Gupta <sumeetg@nvidia.com>

drivers/virt/tegra/Makefile

@@ -4,6 +4,10 @@
 #
 # Makefile for Hypervisor interface
 #
+ifeq ($(CONFIG_LOCALVERSION), -prod)
+ccflags-y += -DCONFIG_BUILD_PROD
+endif
+
 ifneq ($(NV_OOT_TEGRA_HV_SKIP_BUILD),y)
 obj-m		+= tegra_hv.o
 else

drivers/virt/tegra/tegra_hv.c

@@ -819,6 +819,7 @@ int tegra_hv_ivc_read_user(struct tegra_hv_ivc_cookie *ivck, void __user *buf, i
 }
 EXPORT_SYMBOL(tegra_hv_ivc_read_user);
 
+#ifndef CONFIG_BUILD_PROD
 int tegra_hv_ivc_read_peek(struct tegra_hv_ivc_cookie *ivck, void *buf,
 			   int off, int count)
 {
@@ -827,6 +828,7 @@ int tegra_hv_ivc_read_peek(struct tegra_hv_ivc_cookie *ivck, void *buf,
 	return tegra_ivc_read_peek(&ivc->ivc, NULL, buf, off, count);
 }
 EXPORT_SYMBOL(tegra_hv_ivc_read_peek);
+#endif
 
 int tegra_hv_ivc_can_read(struct tegra_hv_ivc_cookie *ivck)
 {
@@ -844,6 +846,7 @@ int tegra_hv_ivc_can_write(struct tegra_hv_ivc_cookie *ivck)
 }
 EXPORT_SYMBOL(tegra_hv_ivc_can_write);
 
+#ifndef CONFIG_BUILD_PROD
 int tegra_hv_ivc_tx_empty(struct tegra_hv_ivc_cookie *ivck)
 {
 	struct hv_ivc *ivc = cookie_to_ivc_dev(ivck);
@@ -874,6 +877,7 @@ int tegra_hv_ivc_dump(struct tegra_hv_ivc_cookie *ivck)
 	return ivc_dump(ivc);
 }
 EXPORT_SYMBOL(tegra_hv_ivc_dump);
+#endif
 
 void *tegra_hv_ivc_read_get_next_frame(struct tegra_hv_ivc_cookie *ivck)
 {

include/soc/tegra/virt/hv-ivc.h

@@ -132,6 +132,7 @@ int tegra_hv_ivc_can_read(struct tegra_hv_ivc_cookie *ivck);
  */
 int tegra_hv_ivc_can_write(struct tegra_hv_ivc_cookie *ivck);
 
+#ifndef CONFIG_BUILD_PROD
 /**
  * tegra_ivc_tx_frames_available - gets number of free entries in tx queue
  * @ivc/@ivck	IVC channel or cookie
@@ -153,21 +154,6 @@ uint32_t tegra_hv_ivc_tx_frames_available(struct tegra_hv_ivc_cookie *ivck);
  */
 int tegra_hv_ivc_tx_empty(struct tegra_hv_ivc_cookie *ivck);
 
-/**
- * ivc_hv_ivc_loopback - Sets (or clears) loopback mode
- * @ivck	IVC cookie of the queue
- * @mode	Set loopback on/off (1 = on, 0 = off)
- *
- * Sets or clears loopback mode accordingly.
- *
- * When loopback is active any writes are ignored, while
- * reads do not return data.
- * Incoming data are copied immediately to the tx queue.
- *
- * Returns 0 on success, a negative error code otherwise
- */
-int tegra_hv_ivc_set_loopback(struct tegra_hv_ivc_cookie *ivck, int mode);
-
 /* debugging aid */
 int tegra_hv_ivc_dump(struct tegra_hv_ivc_cookie *ivck);
 
@@ -186,6 +172,7 @@ int tegra_hv_ivc_dump(struct tegra_hv_ivc_cookie *ivck);
 int tegra_hv_ivc_read_peek(struct tegra_hv_ivc_cookie *ivck,
 		void *buf, int off, int count);
 
+#endif
 /**
  * ivc_hv_ivc_read_get_next_frame - Peek at the next frame to receive
  * @ivck	IVC cookie of the queue
@@ -207,21 +194,6 @@ void *tegra_hv_ivc_read_get_next_frame(struct tegra_hv_ivc_cookie *ivck);
  */
 int tegra_hv_ivc_read_advance(struct tegra_hv_ivc_cookie *ivck);
 
-/**
- * ivc_hv_ivc_write_poke - Poke data to a frame to be transmitted
- * @ivck	IVC cookie of the queue
- * @buf		Buffer to the data
- * @off		Offset in the frame
- * @count	Count of bytes to copy
- *
- * Copy data to a transmit frame, copying from buf, without advancing
- * the the transmit queue.
- *
- * Returns 0 on success, a negative error code otherwise
- */
-int tegra_hv_ivc_write_poke(struct tegra_hv_ivc_cookie *ivck,
-		const void *buf, int off, int count);
-
 /**
  * ivc_hv_ivc_write_get_next_frame - Poke at the next frame to transmit
  * @ivck	IVC cookie of the queue