Adding upstream version 6.6.15.upstream/6.6.15

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

1 files changed, 207 insertions, 0 deletions

diff --git a/drivers/net/ipa/ipa_endpoint.h b/drivers/net/ipa/ipa_endpoint.h
new file mode 100644
index 0000000000..3ad2e80204
--- /dev/null
+++ b/drivers/net/ipa/ipa_endpoint.h
@@ -0,0 +1,207 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+/* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
+ * Copyright (C) 2019-2023 Linaro Ltd.
+ */
+#ifndef _IPA_ENDPOINT_H_
+#define _IPA_ENDPOINT_H_
+
+#include <linux/types.h>
+#include <linux/workqueue.h>
+#include <linux/if_ether.h>
+
+#include "gsi.h"
+#include "ipa_reg.h"
+
+struct net_device;
+struct sk_buff;
+
+struct ipa;
+struct ipa_gsi_endpoint_data;
+
+/* Non-zero granularity of counter used to implement aggregation timeout */
+#define IPA_AGGR_GRANULARITY		500	/* microseconds */
+
+#define IPA_MTU			ETH_DATA_LEN
+
+enum ipa_endpoint_name {
+	IPA_ENDPOINT_AP_COMMAND_TX,
+	IPA_ENDPOINT_AP_LAN_RX,
+	IPA_ENDPOINT_AP_MODEM_TX,
+	IPA_ENDPOINT_AP_MODEM_RX,
+	IPA_ENDPOINT_MODEM_COMMAND_TX,
+	IPA_ENDPOINT_MODEM_LAN_TX,
+	IPA_ENDPOINT_MODEM_LAN_RX,
+	IPA_ENDPOINT_MODEM_AP_TX,
+	IPA_ENDPOINT_MODEM_AP_RX,
+	IPA_ENDPOINT_MODEM_DL_NLO_TX,
+	IPA_ENDPOINT_COUNT,	/* Number of names (not an index) */
+};
+
+#define IPA_ENDPOINT_MAX		36	/* Max supported by driver */
+
+/**
+ * struct ipa_endpoint_tx - Endpoint configuration for TX endpoints
+ * @seq_type:		primary packet processing sequencer type
+ * @seq_rep_type:	sequencer type for replication processing
+ * @status_endpoint:	endpoint to which status elements are sent
+ *
+ * The @status_endpoint is only valid if the endpoint's @status_enable
+ * flag is set.
+ */
+struct ipa_endpoint_tx {
+	enum ipa_seq_type seq_type;
+	enum ipa_seq_rep_type seq_rep_type;
+	enum ipa_endpoint_name status_endpoint;
+};
+
+/**
+ * struct ipa_endpoint_rx - Endpoint configuration for RX endpoints
+ * @buffer_size:	requested receive buffer size (bytes)
+ * @pad_align:		power-of-2 boundary to which packet payload is aligned
+ * @aggr_time_limit:	time before aggregation closes (microseconds)
+ * @aggr_hard_limit:	whether aggregation closes before or after boundary
+ * @aggr_close_eof:	whether aggregation closes on end-of-frame
+ * @holb_drop:		whether to drop packets to avoid head-of-line blocking
+ *
+ * The actual size of the receive buffer is rounded up if necessary
+ * to be a power-of-2 number of pages.
+ *
+ * With each packet it transfers, the IPA hardware can perform certain
+ * transformations of its packet data.  One of these is adding pad bytes
+ * to the end of the packet data so the result ends on a power-of-2 boundary.
+ *
+ * It is also able to aggregate multiple packets into a single receive buffer.
+ * Aggregation is "open" while a buffer is being filled, and "closes" when
+ * certain criteria are met.
+ *
+ * A time limit can be specified to close aggregation.  Aggregation will be
+ * closed if this period passes after data is first written into a receive
+ * buffer.  If not specified, no time limit is imposed.
+ *
+ * Insufficient space available in the receive buffer can close aggregation.
+ * The aggregation byte limit defines the point (in units of 1024 bytes) in
+ * the buffer where aggregation closes.  With a "soft" aggregation limit,
+ * aggregation closes when a packet written to the buffer *crosses* that
+ * aggregation limit.  With a "hard" aggregation limit, aggregation will
+ * close *before* writing a packet that would cross that boundary.
+ */
+struct ipa_endpoint_rx {
+	u32 buffer_size;
+	u32 pad_align;
+	u32 aggr_time_limit;
+	bool aggr_hard_limit;
+	bool aggr_close_eof;
+	bool holb_drop;
+};
+
+/**
+ * struct ipa_endpoint_config - IPA endpoint hardware configuration
+ * @resource_group:	resource group to assign endpoint to
+ * @checksum:		whether checksum offload is enabled
+ * @qmap:		whether endpoint uses QMAP protocol
+ * @aggregation:	whether endpoint supports aggregation
+ * @status_enable:	whether endpoint uses status elements
+ * @dma_mode:		whether endpoint operates in DMA mode
+ * @dma_endpoint:	peer endpoint, if operating in DMA mode
+ * @tx:			TX-specific endpoint information (see above)
+ * @rx:			RX-specific endpoint information (see above)
+ */
+struct ipa_endpoint_config {
+	u32 resource_group;
+	bool checksum;
+	bool qmap;
+	bool aggregation;
+	bool status_enable;
+	bool dma_mode;
+	enum ipa_endpoint_name dma_endpoint;
+	union {
+		struct ipa_endpoint_tx tx;
+		struct ipa_endpoint_rx rx;
+	};
+};
+
+/**
+ * enum ipa_replenish_flag:	RX buffer replenish flags
+ *
+ * @IPA_REPLENISH_ENABLED:	Whether receive buffer replenishing is enabled
+ * @IPA_REPLENISH_ACTIVE:	Whether replenishing is underway
+ * @IPA_REPLENISH_COUNT:	Number of defined replenish flags
+ */
+enum ipa_replenish_flag {
+	IPA_REPLENISH_ENABLED,
+	IPA_REPLENISH_ACTIVE,
+	IPA_REPLENISH_COUNT,	/* Number of flags (must be last) */
+};
+
+/**
+ * struct ipa_endpoint - IPA endpoint information
+ * @ipa:		IPA pointer
+ * @ee_id:		Execution environmnent endpoint is associated with
+ * @channel_id:		GSI channel used by the endpoint
+ * @endpoint_id:	IPA endpoint number
+ * @toward_ipa:		Endpoint direction (true = TX, false = RX)
+ * @config:		Default endpoint configuration
+ * @skb_frag_max:	Maximum allowed number of TX SKB fragments
+ * @evt_ring_id:	GSI event ring used by the endpoint
+ * @netdev:		Network device pointer, if endpoint uses one
+ * @replenish_flags:	Replenishing state flags
+ * @replenish_count:	Total number of replenish transactions committed
+ * @replenish_work:	Work item used for repeated replenish failures
+ */
+struct ipa_endpoint {
+	struct ipa *ipa;
+	enum gsi_ee_id ee_id;
+	u32 channel_id;
+	u32 endpoint_id;
+	bool toward_ipa;
+	struct ipa_endpoint_config config;
+
+	u32 skb_frag_max;	/* Used for netdev TX only */
+	u32 evt_ring_id;
+
+	/* Net device this endpoint is associated with, if any */
+	struct net_device *netdev;
+
+	/* Receive buffer replenishing for RX endpoints */
+	DECLARE_BITMAP(replenish_flags, IPA_REPLENISH_COUNT);
+	u64 replenish_count;
+	struct delayed_work replenish_work;		/* global wq */
+};
+
+void ipa_endpoint_modem_hol_block_clear_all(struct ipa *ipa);
+
+void ipa_endpoint_modem_pause_all(struct ipa *ipa, bool enable);
+
+int ipa_endpoint_modem_exception_reset_all(struct ipa *ipa);
+
+int ipa_endpoint_skb_tx(struct ipa_endpoint *endpoint, struct sk_buff *skb);
+
+int ipa_endpoint_enable_one(struct ipa_endpoint *endpoint);
+void ipa_endpoint_disable_one(struct ipa_endpoint *endpoint);
+
+void ipa_endpoint_suspend_one(struct ipa_endpoint *endpoint);
+void ipa_endpoint_resume_one(struct ipa_endpoint *endpoint);
+
+void ipa_endpoint_suspend(struct ipa *ipa);
+void ipa_endpoint_resume(struct ipa *ipa);
+
+void ipa_endpoint_setup(struct ipa *ipa);
+void ipa_endpoint_teardown(struct ipa *ipa);
+
+int ipa_endpoint_config(struct ipa *ipa);
+void ipa_endpoint_deconfig(struct ipa *ipa);
+
+void ipa_endpoint_default_route_set(struct ipa *ipa, u32 endpoint_id);
+void ipa_endpoint_default_route_clear(struct ipa *ipa);
+
+int ipa_endpoint_init(struct ipa *ipa, u32 count,
+		      const struct ipa_gsi_endpoint_data *data);
+void ipa_endpoint_exit(struct ipa *ipa);
+
+void ipa_endpoint_trans_complete(struct ipa_endpoint *ipa,
+				 struct gsi_trans *trans);
+void ipa_endpoint_trans_release(struct ipa_endpoint *ipa,
+				struct gsi_trans *trans);
+
+#endif /* _IPA_ENDPOINT_H_ */