commit 61da4d35575ddf7f62d4f5c687356f65a7246aed
author Anton Moberg <anton.moberg@arm.com> Tue Dec 22 16:00:31 2020 +0100
committer Anton Moberg <anton.moberg@arm.com> Wed Jan 27 15:27:28 2021 +0100
tree d87b749774bf4f1ee75a78cad2013816ae6dac2f
parent 91e0be55cf752112c60480faefe124cfd8ff211c

MLBEDSW-3796 Ethos-U driver interface multiple NPUs

---ethosu_driver---
Modified: Declarations for the driver interfaces to support multiNPU (takes *drv)
Added: ethosu_register_driver(...) to allow for a specific NPU driver to be instantiated
Added: ethosu_deregister_Driver(...) to allow for a specific NPU driver to be de-registered
Added: ethosu_reserve_driver(...) to reserve & return the first NPU driver instance available
Added: ethosu_release_driver(...) to release a specific NPU driver instance and make it available again
Added: *registered_drivers - A  static linked list of drivers ready be used

---ethosu_pmu---
Modified: Declarations for pmu interfaces to support multiNPU (takes *drv)

---ethosu_device---
Modified: Resolved a circular include dependency (Remove include and add ETHOSU_PMU_NCOUNTERS macro)

Change-Id: Iede41cd41bb0d5d483bd9d929d1b6c9ca5d3c48e

include/ethosu_driver.h

diff --git a/include/ethosu_driver.h b/include/ethosu_driver.h
index d47b676..70e3110 100644
--- a/include/ethosu_driver.h
+++ b/include/ethosu_driver.h
@@ -45,6 +45,8 @@
     size_t fast_memory_size;
     bool status_error;
     bool dev_power_always_on;
+    struct ethosu_driver *next;
+    bool reserved;
 };
 
 struct ethosu_version_id
@@ -90,7 +92,8 @@
 /**
  * Initialize the Ethos-U driver.
  */
-int ethosu_init_v3(const void *base_address,
+int ethosu_init_v4(struct ethosu_driver *drv,
+                   const void *base_address,
                    const void *fast_memory,
                    const size_t fast_memory_size,
                    uint32_t secure_enable,
@@ -99,16 +102,21 @@
 #define ethosu_init(base_address) ethosu_init_v3(base_address, NULL, 0, 0, 0)
 #define ethosu_init_v2(base_address, fast_memory, fast_memory_size)                                                    \
     ethosu_init_v3(base_address, fast_memory, fast_memory_size, 0, 0)
+#define ethosu_init_v3(base_address, fast_memory, fast_memory_size, secure_enable, privilege_enable)                   \
+    ethosu_init_v4(&ethosu_drv, base_address, fast_memory, fast_memory_size, secure_enable, privilege_enable)
 
 /**
  * Get Ethos-U version.
  */
-int ethosu_get_version(struct ethosu_version *version);
+int ethosu_get_version_v2(struct ethosu_driver *drv, struct ethosu_version *version);
+
+#define ethosu_get_version(version) ethosu_get_version_v2(&ethosu_drv, version)
 
 /**
  * Invoke Vela command stream.
  */
-int ethosu_invoke_v2(const void *custom_data_ptr,
+int ethosu_invoke_v3(struct ethosu_driver *drv,
+                     const void *custom_data_ptr,
                      const int custom_data_size,
                      const uint64_t *base_addr,
                      const size_t *base_addr_size,
@@ -116,21 +124,49 @@
 
 #define ethosu_invoke(custom_data_ptr, custom_data_size, base_addr, num_base_addr)                                     \
     ethosu_invoke_v2(custom_data_ptr, custom_data_size, base_addr, NULL, num_base_addr)
+#define ethosu_invoke_v2(custom_data_ptr, custom_data_size, base_addr, base_addr_size, num_base_addr)                  \
+    ethosu_invoke_v3(&ethosu_drv, custom_data_ptr, custom_data_size, base_addr, base_addr_size, num_base_addr)
 
 /**
  * Abort Ethos-U inference.
  */
-void ethosu_abort(void);
+void ethosu_abort_v2(struct ethosu_driver *drv);
+
+#define ethosu_abort(void) ethosu_abort_v2(&ethosu_drv)
 
 /**
  * Interrupt handler do be called on IRQ from Ethos-U
  */
-void ethosu_irq_handler(void);
+void ethosu_irq_handler_v2(struct ethosu_driver *drv);
+
+#define ethosu_irq_handler(void) ethosu_irq_handler_v2(&ethosu_drv)
 
 /**
  * Set Ethos-U power mode.
  */
-void ethosu_set_power_mode(bool);
+void ethosu_set_power_mode_v2(struct ethosu_driver *drv, bool always_on);
+
+#define ethosu_set_power_mode(always_on) ethosu_set_power_mode_v2(&ethosu_drv, always_on)
+
+/**
+ *  Register a driver for multiNPU usage
+ */
+int ethosu_register_driver(struct ethosu_driver *drv);
+
+/**
+ * Deregister a driver from multiNPU usage
+ */
+int ethosu_deregister_driver(struct ethosu_driver *drv);
+
+/**
+ * Find, reserve, and return the first available driver
+ */
+struct ethosu_driver *ethosu_reserve_driver(void);
+
+/**
+ * Change driver status to available
+ */
+void ethosu_release_driver(struct ethosu_driver *drv);
 
 #ifdef __cplusplus
 }