arm: mach-k3: Refactor QoS settings

Refactor common QoS code into a new common header file, and the soc
specific setup_qos functions into a common API.

Rename $(soc)_qos_count and $(soc)_qos_data variables to qos_count and
qos_data. When QoS settings of more SoCs are added, only one pair will
be defined at a time, based on the config SOC_K3_$(soc).

This refactoring has been done for 2 major purposes.

- The auto-generated $(soc)_qos_data.c and $(soc)_qos.h files cannot
  have any code that is specific to any bootloader. Those files have to
  remain agnostic of different bootloader implementations and their
  header files.

- The existing implementation was less than ideal and would have enabled
  multiple $(soc)_qos_count and $(soc)_qos_data variables for all SoC
  variants.

Signed-off-by: Aradhya Bhatia <a-bhatia1@ti.com>

arch/arm/mach-k3/am62a7_init.c

@@ -69,20 +69,6 @@ static void ctrl_mmr_unlock(void)
 	mmr_unlock(PADCFG_MMR1_BASE, 1);
 }
 
-#if (IS_ENABLED(CONFIG_CPU_V7R))
-static void setup_qos(void)
-{
-	u32 i;
-
-	for (i = 0; i < am62a_qos_count; i++)
-		writel(am62a_qos_data[i].val, (uintptr_t)am62a_qos_data[i].reg);
-}
-#else
-static void setup_qos(void)
-{
-}
-#endif
-
 void board_init_f(ulong dummy)
 {
 	struct udevice *dev;

arch/arm/mach-k3/common.c

@@ -28,6 +28,8 @@
 #include <elf.h>
 #include <soc.h>
 
+#include <asm/arch/k3-qos.h>
+
 #if IS_ENABLED(CONFIG_SYS_K3_SPL_ATF)
 enum {
 	IMAGE_ID_ATF,
@@ -595,3 +597,13 @@ int misc_init_r(void)
 void __weak do_board_detect(void)
 {
 }
+
+#if (IS_ENABLED(CONFIG_K3_QOS))
+void setup_qos(void)
+{
+	u32 i;
+
+	for (i = 0; i < qos_count; i++)
+		writel(qos_data[i].val, (uintptr_t)qos_data[i].reg);
+}
+#endif

arch/arm/mach-k3/common.h

@@ -45,3 +45,11 @@ void ti_secure_image_post_process(void **p_image, size_t *p_size);
 struct ti_sci_handle *get_ti_sci_handle(void);
 void do_board_detect(void);
 void ti_secure_image_check_binary(void **p_image, size_t *p_size);
+
+#if (IS_ENABLED(CONFIG_K3_QOS))
+void setup_qos(void);
+#else
+static inline void setup_qos(void)
+{
+}
+#endif

arch/arm/mach-k3/include/mach/hardware.h

@@ -30,7 +30,6 @@
 
 #ifdef CONFIG_SOC_K3_AM62A7
 #include "am62a_hardware.h"
-#include "am62a_qos.h"
 #endif
 
 /* Assuming these addresses and definitions stay common across K3 devices */
@@ -97,12 +96,4 @@ struct rom_extended_boot_data {
 	u32 num_components;
 };
 
-struct k3_qos_data {
-	u32 reg;
-	u32 val;
-};
-
-extern struct k3_qos_data am62a_qos_data[];
-extern u32 am62a_qos_count;
-
 #endif /* _ASM_ARCH_HARDWARE_H_ */

arch/arm/mach-k3/include/mach/k3-qos.h

@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Quality of Service (QoS) Configuration Header File
+ *
+ * Copyright (C) 2024 Texas Instruments Incorporated - https://www.ti.com/
+ */
+#ifndef _K3_QOS_H_
+#define _K3_QOS_H_
+
+#include <linux/kernel.h>
+
+struct k3_qos_data {
+	u32 reg;
+	u32 val;
+};
+
+#if (IS_ENABLED(CONFIG_K3_QOS))
+extern struct k3_qos_data qos_data[];
+extern u32 qos_count;
+#endif
+
+#endif /* _K3_QOS_H_ */

arch/arm/mach-k3/r5/Kconfig

@@ -1,6 +1,14 @@
 config K3_LOAD_SYSFW
 	bool
 
+config K3_QOS
+	bool "Enable Quality of Service (QoS) Settings for TI K3 SoCs"
+	default y if SOC_K3_AM62A7
+	help
+	  This option enables the R5 SPL to apply QoS settings for various
+	  HW controllers inside the TI K3 SoCs. The files for QoS settings are
+	  generated from Sysconfig and k3-resource-partitioning tools.
+
 config K3_SYSFW_IMAGE_NAME
 	string "File name of SYSFW firmware and configuration blob"
 	depends on K3_LOAD_SYSFW

arch/arm/mach-k3/r5/am62ax/Makefile

@@ -4,4 +4,4 @@
 
 obj-y += clk-data.o
 obj-y += dev-data.o
-obj-y += am62a_qos_data.o
+obj-y += am62a_qos_uboot.o

arch/arm/mach-k3/r5/am62ax/am62a_qos_uboot.c

@@ -5,10 +5,11 @@
  *
  * Copyright (C) 2022 Texas Instruments Incorporated - https://www.ti.com/
  */
-#include <asm/arch/hardware.h>
-#include "common.h"
 
-struct k3_qos_data am62a_qos_data[] = {
+#include <asm/arch/k3-qos.h>
+#include "am62a_qos.h"
+
+struct k3_qos_data qos_data[] = {
 	/* modules_qosConfig0 - 1 endpoints, 4 channels */
 	{
 		.reg = K3_DSS_UL_MAIN_0_VBUSM_DMA + 0x100 + 0x4 * 0,
@@ -43,4 +44,4 @@ struct k3_qos_data am62a_qos_data[] = {
 	},
 };
 
-uint32_t am62a_qos_count = sizeof(am62a_qos_data) / sizeof(am62a_qos_data[0]);
+u32 qos_count = ARRAY_SIZE(qos_data);