Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 175 insertions, 0 deletions

diff --git a/drivers/net/ipa/ipa_cmd.h b/drivers/net/ipa/ipa_cmd.h
new file mode 100644
index 000000000..e2cf1c2b0
--- /dev/null
+++ b/drivers/net/ipa/ipa_cmd.h
@@ -0,0 +1,175 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+/* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
+ * Copyright (C) 2019-2022 Linaro Ltd.
+ */
+#ifndef _IPA_CMD_H_
+#define _IPA_CMD_H_
+
+#include <linux/types.h>
+#include <linux/dma-direction.h>
+
+struct sk_buff;
+struct scatterlist;
+
+struct ipa;
+struct ipa_mem;
+struct gsi_trans;
+struct gsi_channel;
+
+/**
+ * enum ipa_cmd_opcode:	IPA immediate commands
+ *
+ * @IPA_CMD_IP_V4_FILTER_INIT:	Initialize IPv4 filter table
+ * @IPA_CMD_IP_V6_FILTER_INIT:	Initialize IPv6 filter table
+ * @IPA_CMD_IP_V4_ROUTING_INIT:	Initialize IPv4 routing table
+ * @IPA_CMD_IP_V6_ROUTING_INIT:	Initialize IPv6 routing table
+ * @IPA_CMD_HDR_INIT_LOCAL:	Initialize IPA-local header memory
+ * @IPA_CMD_REGISTER_WRITE:	Register write performed by IPA
+ * @IPA_CMD_IP_PACKET_INIT:	Set up next packet's destination endpoint
+ * @IPA_CMD_DMA_SHARED_MEM:	DMA command performed by IPA
+ * @IPA_CMD_IP_PACKET_TAG_STATUS: Have next packet generate tag * status
+ * @IPA_CMD_NONE:		Special (invalid) "not a command" value
+ *
+ * All immediate commands are issued using the AP command TX endpoint.
+ */
+enum ipa_cmd_opcode {
+	IPA_CMD_NONE			= 0x0,
+	IPA_CMD_IP_V4_FILTER_INIT	= 0x3,
+	IPA_CMD_IP_V6_FILTER_INIT	= 0x4,
+	IPA_CMD_IP_V4_ROUTING_INIT	= 0x7,
+	IPA_CMD_IP_V6_ROUTING_INIT	= 0x8,
+	IPA_CMD_HDR_INIT_LOCAL		= 0x9,
+	IPA_CMD_REGISTER_WRITE		= 0xc,
+	IPA_CMD_IP_PACKET_INIT		= 0x10,
+	IPA_CMD_DMA_SHARED_MEM		= 0x13,
+	IPA_CMD_IP_PACKET_TAG_STATUS	= 0x14,
+};
+
+/**
+ * ipa_cmd_table_init_valid() - Validate a memory region holding a table
+ * @ipa:	- IPA pointer
+ * @mem:	- IPA memory region descriptor
+ * @route:	- Whether the region holds a route or filter table
+ *
+ * Return:	true if region is valid, false otherwise
+ */
+bool ipa_cmd_table_init_valid(struct ipa *ipa, const struct ipa_mem *mem,
+			      bool route);
+
+/**
+ * ipa_cmd_data_valid() - Validate command-realted configuration is valid
+ * @ipa:	- IPA pointer
+ *
+ * Return:	true if assumptions required for command are valid
+ */
+bool ipa_cmd_data_valid(struct ipa *ipa);
+
+/**
+ * ipa_cmd_pool_init() - initialize command channel pools
+ * @channel:	AP->IPA command TX GSI channel pointer
+ * @tre_count:	Number of pool elements to allocate
+ *
+ * Return:	0 if successful, or a negative error code
+ */
+int ipa_cmd_pool_init(struct gsi_channel *channel, u32 tre_count);
+
+/**
+ * ipa_cmd_pool_exit() - Inverse of ipa_cmd_pool_init()
+ * @channel:	AP->IPA command TX GSI channel pointer
+ */
+void ipa_cmd_pool_exit(struct gsi_channel *channel);
+
+/**
+ * ipa_cmd_table_init_add() - Add table init command to a transaction
+ * @trans:	GSI transaction
+ * @opcode:	IPA immediate command opcode
+ * @size:	Size of non-hashed routing table memory
+ * @offset:	Offset in IPA shared memory of non-hashed routing table memory
+ * @addr:	DMA address of non-hashed table data to write
+ * @hash_size:	Size of hashed routing table memory
+ * @hash_offset: Offset in IPA shared memory of hashed routing table memory
+ * @hash_addr:	DMA address of hashed table data to write
+ *
+ * If hash_size is 0, hash_offset and hash_addr are ignored.
+ */
+void ipa_cmd_table_init_add(struct gsi_trans *trans, enum ipa_cmd_opcode opcode,
+			    u16 size, u32 offset, dma_addr_t addr,
+			    u16 hash_size, u32 hash_offset,
+			    dma_addr_t hash_addr);
+
+/**
+ * ipa_cmd_hdr_init_local_add() - Add a header init command to a transaction
+ * @trans:	GSI transaction
+ * @offset:	Offset of header memory in IPA local space
+ * @size:	Size of header memory
+ * @addr:	DMA address of buffer to be written from
+ *
+ * Defines and fills the location in IPA memory to use for headers.
+ */
+void ipa_cmd_hdr_init_local_add(struct gsi_trans *trans, u32 offset, u16 size,
+				dma_addr_t addr);
+
+/**
+ * ipa_cmd_register_write_add() - Add a register write command to a transaction
+ * @trans:	GSI transaction
+ * @offset:	Offset of register to be written
+ * @value:	Value to be written
+ * @mask:	Mask of bits in register to update with bits from value
+ * @clear_full: Pipeline clear option; true means full pipeline clear
+ */
+void ipa_cmd_register_write_add(struct gsi_trans *trans, u32 offset, u32 value,
+				u32 mask, bool clear_full);
+
+/**
+ * ipa_cmd_dma_shared_mem_add() - Add a DMA memory command to a transaction
+ * @trans:	GSI transaction
+ * @offset:	Offset of IPA memory to be read or written
+ * @size:	Number of bytes of memory to be transferred
+ * @addr:	DMA address of buffer to be read into or written from
+ * @toward_ipa:	true means write to IPA memory; false means read
+ */
+void ipa_cmd_dma_shared_mem_add(struct gsi_trans *trans, u32 offset,
+				u16 size, dma_addr_t addr, bool toward_ipa);
+
+/**
+ * ipa_cmd_pipeline_clear_add() - Add pipeline clear commands to a transaction
+ * @trans:	GSI transaction
+ */
+void ipa_cmd_pipeline_clear_add(struct gsi_trans *trans);
+
+/**
+ * ipa_cmd_pipeline_clear_count() - # commands required to clear pipeline
+ *
+ * Return:	The number of elements to allocate in a transaction
+ *		to hold commands to clear the pipeline
+ */
+u32 ipa_cmd_pipeline_clear_count(void);
+
+/**
+ * ipa_cmd_pipeline_clear_wait() - Wait pipeline clear to complete
+ * @ipa:	- IPA pointer
+ */
+void ipa_cmd_pipeline_clear_wait(struct ipa *ipa);
+
+/**
+ * ipa_cmd_trans_alloc() - Allocate a transaction for the command TX endpoint
+ * @ipa:	IPA pointer
+ * @tre_count:	Number of elements in the transaction
+ *
+ * Return:	A GSI transaction structure, or a null pointer if all
+ *		available transactions are in use
+ */
+struct gsi_trans *ipa_cmd_trans_alloc(struct ipa *ipa, u32 tre_count);
+
+/**
+ * ipa_cmd_init() - Initialize IPA immediate commands
+ * @ipa:	- IPA pointer
+ *
+ * Return:	0 if successful, or a negative error code
+ *
+ * There is no need for a matching ipa_cmd_exit() function.
+ */
+int ipa_cmd_init(struct ipa *ipa);
+
+#endif /* _IPA_CMD_H_ */