[PATCH v4 23/45] media: ipu6: Add ipu7 fw com methods

[Sakari Ailus <sakari.ailus@linux.intel.com>]

From: Antti Laakso <antti.laakso@linux.intel.com>

The get/put token methods read/write to ipu7 firmware message queues.

Signed-off-by: Antti Laakso <antti.laakso@linux.intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
---
 drivers/media/pci/intel/ipu6/Makefile      |  4 +-
 drivers/media/pci/intel/ipu6/ipu7-fw-com.c | 74 ++++++++++++++++++++++
 drivers/media/pci/intel/ipu6/ipu7-fw-com.h | 51 +++++++++++++++
 3 files changed, 128 insertions(+), 1 deletion(-)
 create mode 100644 drivers/media/pci/intel/ipu6/ipu7-fw-com.c
 create mode 100644 drivers/media/pci/intel/ipu6/ipu7-fw-com.h

diff --git a/drivers/media/pci/intel/ipu6/Makefile b/drivers/media/pci/intel/ipu6/Makefile
index c0daf0995b22..406e2e19df17 100644
--- a/drivers/media/pci/intel/ipu6/Makefile
+++ b/drivers/media/pci/intel/ipu6/Makefile
@@ -8,7 +8,9 @@ intel-ipu6-y			:= ipu6.o \
 				ipu7-mmu-hw.o \
 				ipu6-buttress.o \
 				ipu6-cpd.o \
-				ipu6-fw-com.o
+				ipu6-fw-com.o \
+				ipu7-fw-com.o \
+				ipu7-boot.o
 
 obj-$(CONFIG_VIDEO_INTEL_IPU6)	+= intel-ipu6.o
 
diff --git a/drivers/media/pci/intel/ipu6/ipu7-fw-com.c b/drivers/media/pci/intel/ipu6/ipu7-fw-com.c
new file mode 100644
index 000000000000..7dd1e683aa92
--- /dev/null
+++ b/drivers/media/pci/intel/ipu6/ipu7-fw-com.c
@@ -0,0 +1,74 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2026 Intel Corporation
+ */
+
+#include <linux/io.h>
+
+#include "ipu7-fw-com.h"
+
+static void __iomem *ipu7_fw_com_get_indices(struct ipu7_fw_com_context *ctx,
+					     u32 q)
+{
+	return ctx->queue_indices + (q * sizeof(struct ipu7_fw_com_queue_indices));
+}
+
+void *ipu7_fw_com_get_token(struct ipu7_fw_com_context *ctx, int q)
+{
+	struct ipu7_fw_com_queue_config *queue_params = &ctx->queue_configs[q];
+	void __iomem *queue_indices = ipu7_fw_com_get_indices(ctx, q);
+	u32 write_index = readl(queue_indices +
+				offsetof(struct ipu7_fw_com_queue_indices,
+					 write_index));
+	u32 read_index = readl(queue_indices +
+			       offsetof(struct ipu7_fw_com_queue_indices,
+					read_index));
+	void *token = NULL;
+
+	if (q < ctx->num_output_queues) {
+		/* Output queue */
+		bool empty = (write_index == read_index);
+
+		if (!empty)
+			token = queue_params->token_array_mem +
+				read_index *
+				queue_params->token_size_in_bytes;
+	} else {
+		/* Input queue */
+		bool full = (read_index == ((write_index + 1U) %
+					    (u32)queue_params->max_capacity));
+
+		if (!full)
+			token = queue_params->token_array_mem +
+				write_index * queue_params->token_size_in_bytes;
+	}
+	return token;
+}
+EXPORT_SYMBOL_NS_GPL(ipu7_fw_com_get_token, "INTEL_IPU6");
+
+void ipu7_fw_com_put_token(struct ipu7_fw_com_context *ctx, int q)
+{
+	struct ipu7_fw_com_queue_config *queue_params = &ctx->queue_configs[q];
+	void __iomem *queue_indices = ipu7_fw_com_get_indices(ctx, q);
+	u32 offset, index;
+
+	if (q < ctx->num_output_queues)
+		/* Output queue */
+		offset = offsetof(struct ipu7_fw_com_queue_indices, read_index);
+
+	else
+		/* Input queue */
+		offset = offsetof(struct ipu7_fw_com_queue_indices, write_index);
+
+	index = readl(queue_indices + offset);
+	writel((index + 1U) % queue_params->max_capacity,
+	       queue_indices + offset);
+}
+EXPORT_SYMBOL_NS_GPL(ipu7_fw_com_put_token, "INTEL_IPU6");
+
+struct ipu7_fw_com_queue_params_config *
+ipu7_fw_com_get_queue_config(struct ipu7_fw_com_config *config)
+{
+	return (struct ipu7_fw_com_queue_params_config *)(&config[1]);
+}
+EXPORT_SYMBOL_NS_GPL(ipu7_fw_com_get_queue_config, "INTEL_IPU6");
diff --git a/drivers/media/pci/intel/ipu6/ipu7-fw-com.h b/drivers/media/pci/intel/ipu6/ipu7-fw-com.h
new file mode 100644
index 000000000000..10c09e759bed
--- /dev/null
+++ b/drivers/media/pci/intel/ipu6/ipu7-fw-com.h
@@ -0,0 +1,51 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* Copyright (C) 2026 Intel Corporation */
+
+#ifndef IPU7_FW_COM_H
+#define IPU7_FW_COM_H
+
+#include <linux/types.h>
+
+struct ipu7_fw_com_queue_config {
+	void *token_array_mem;
+	u32 queue_size;
+	u16 token_size_in_bytes;
+	u16 max_capacity;
+};
+
+struct ipu7_fw_com_context {
+	u16 num_input_queues;
+	u16 num_output_queues;
+	struct ipu7_fw_com_queue_config *queue_configs;
+	void __iomem *queue_indices;
+	dma_addr_t queue_mem_dma_addr;
+	void *queue_mem;
+	u32 queue_mem_size;
+	struct ipu7_boot_abi_cfg *boot_config;
+	dma_addr_t boot_config_dma_addr;
+	u32 boot_config_size;
+	u32 fw_entry;
+};
+
+struct ipu7_fw_com_queue_params_config {
+	u32 token_array_mem;
+	u16 token_size_in_bytes;
+	u16 max_capacity;
+};
+
+struct ipu7_fw_com_config {
+	u16 max_output_queues;
+	u16 max_input_queues;
+};
+
+struct ipu7_fw_com_queue_indices {
+	u32 read_index;
+	u32 write_index;
+};
+
+void ipu7_fw_com_put_token(struct ipu7_fw_com_context *ctx, int q);
+void *ipu7_fw_com_get_token(struct ipu7_fw_com_context *ctx, int q);
+struct ipu7_fw_com_queue_params_config *
+ipu7_fw_com_get_queue_config(struct ipu7_fw_com_config *config);
+
+#endif /* IPU7_FW_COM_H */
-- 
2.47.3