[v2,04/17] soc: qcom: ipa: configuration data

diff --git a/drivers/net/ipa/ipa_data-sdm845.c b/drivers/net/ipa/ipa_data-sdm845.c
new file mode 100644
index 000000000000..62c0f25f5161
--- /dev/null
+++ b/drivers/net/ipa/ipa_data-sdm845.c
@@ -0,0 +1,245 @@ 
+// SPDX-License-Identifier: GPL-2.0
+
+/* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
+ * Copyright (C) 2019 Linaro Ltd.
+ */
+
+#include <linux/log2.h>
+
+#include "gsi.h"
+#include "ipa_data.h"
+#include "ipa_endpoint.h"
+
+/* Differentiate Boolean from numerical options */
+#define NO	0
+#define YES	1
+
+/* Endpoint configuration for the SDM845 SoC. */
+static const struct gsi_ipa_endpoint_data gsi_ipa_endpoint_data[] = {
+	{
+		.ee_id		= GSI_EE_AP,
+		.channel_id	= 4,
+		.endpoint_id	= IPA_ENDPOINT_AP_COMMAND_TX,
+		.toward_ipa	= YES,
+		.channel = {
+			.tlv_count	= 20,
+			.wrr_priority	= YES,
+			.tre_count	= 256,
+			.event_count	= 512,
+		},
+		.endpoint = {
+			.seq_type	= IPA_SEQ_DMA_ONLY,
+			.config = {
+				.dma_mode	= YES,
+				.dma_endpoint	= IPA_ENDPOINT_AP_LAN_RX,
+			},
+		},
+	},
+	{
+		.ee_id		= GSI_EE_AP,
+		.channel_id	= 5,
+		.endpoint_id	= IPA_ENDPOINT_AP_LAN_RX,
+		.toward_ipa	= NO,
+		.channel = {
+			.tlv_count	= 8,
+			.tre_count	= 256,
+			.event_count	= 256,
+		},
+		.endpoint = {
+			.seq_type	= IPA_SEQ_INVALID,
+			.config = {
+				.checksum	= YES,
+				.aggregation	= YES,
+				.status_enable	= YES,
+				.rx = {
+					.pad_align	= ilog2(sizeof(u32)),
+				},
+			},
+		},
+	},
+	{
+		.ee_id		= GSI_EE_AP,
+		.channel_id	= 3,
+		.endpoint_id	= IPA_ENDPOINT_AP_MODEM_TX,
+		.toward_ipa	= YES,
+		.channel = {
+			.tlv_count	= 16,
+			.tre_count	= 512,
+			.event_count	= 512,
+		},
+		.endpoint = {
+			.support_flt	= YES,
+			.seq_type	=
+				IPA_SEQ_2ND_PKT_PROCESS_PASS_NO_DEC_UCP,
+			.config = {
+				.checksum	= YES,
+				.qmap		= YES,
+				.status_enable	= YES,
+				.tx = {
+					.delay	= YES,
+					.status_endpoint =
+						IPA_ENDPOINT_MODEM_AP_RX,
+				},
+			},
+		},
+	},
+	{
+		.ee_id		= GSI_EE_AP,
+		.channel_id	= 6,
+		.endpoint_id	= IPA_ENDPOINT_AP_MODEM_RX,
+		.toward_ipa	= NO,
+		.channel = {
+			.tlv_count	= 8,
+			.tre_count	= 256,
+			.event_count	= 256,
+		},
+		.endpoint = {
+			.seq_type	= IPA_SEQ_INVALID,
+			.config = {
+				.checksum	= YES,
+				.qmap		= YES,
+				.aggregation	= YES,
+				.rx = {
+					.aggr_close_eof	= YES,
+				},
+			},
+		},
+	},
+	{
+		.ee_id		= GSI_EE_MODEM,
+		.channel_id	= 1,
+		.endpoint_id	= IPA_ENDPOINT_MODEM_COMMAND_TX,
+		.toward_ipa	= YES,
+		.endpoint = {
+			.seq_type	= IPA_SEQ_PKT_PROCESS_NO_DEC_UCP,
+		},
+	},
+	{
+		.ee_id		= GSI_EE_MODEM,
+		.channel_id	= 0,
+		.endpoint_id	= IPA_ENDPOINT_MODEM_LAN_TX,
+		.toward_ipa	= YES,
+		.endpoint = {
+			.support_flt	= YES,
+		},
+	},
+	{
+		.ee_id		= GSI_EE_MODEM,
+		.channel_id	= 3,
+		.endpoint_id	= IPA_ENDPOINT_MODEM_LAN_RX,
+		.toward_ipa	= NO,
+	},
+	{
+		.ee_id		= GSI_EE_MODEM,
+		.channel_id	= 4,
+		.endpoint_id	= IPA_ENDPOINT_MODEM_AP_TX,
+		.toward_ipa	= YES,
+		.endpoint = {
+			.support_flt	= YES,
+		},
+	},
+	{
+		.ee_id		= GSI_EE_MODEM,
+		.channel_id	= 2,
+		.endpoint_id	= IPA_ENDPOINT_MODEM_AP_RX,
+		.toward_ipa	= NO,
+	},
+};
+
+static const struct ipa_resource_src ipa_resource_src[] = {
+	{
+		.type = IPA_RESOURCE_TYPE_SRC_PKT_CONTEXTS,
+		.limits[IPA_RESOURCE_GROUP_LWA_DL] = {
+			.min = 1,
+			.max = 63,
+		},
+		.limits[IPA_RESOURCE_GROUP_UL_DL] = {
+			.min = 1,
+			.max = 63,
+		},
+	},
+	{
+		.type = IPA_RESOURCE_TYPE_SRC_DESCRIPTOR_LISTS,
+		.limits[IPA_RESOURCE_GROUP_LWA_DL] = {
+			.min = 10,
+			.max = 10,
+		},
+		.limits[IPA_RESOURCE_GROUP_UL_DL] = {
+			.min = 10,
+			.max = 10,
+		},
+	},
+	{
+		.type = IPA_RESOURCE_TYPE_SRC_DESCRIPTOR_BUFF,
+		.limits[IPA_RESOURCE_GROUP_LWA_DL] = {
+			.min = 12,
+			.max = 12,
+		},
+		.limits[IPA_RESOURCE_GROUP_UL_DL] = {
+			.min = 14,
+			.max = 14,
+		},
+	},
+	{
+		.type = IPA_RESOURCE_TYPE_SRC_HPS_DMARS,
+		.limits[IPA_RESOURCE_GROUP_LWA_DL] = {
+			.min = 0,
+			.max = 63,
+		},
+		.limits[IPA_RESOURCE_GROUP_UL_DL] = {
+			.min = 0,
+			.max = 63,
+		},
+	},
+	{
+		.type = IPA_RESOURCE_TYPE_SRC_ACK_ENTRIES,
+		.limits[IPA_RESOURCE_GROUP_LWA_DL] = {
+			.min = 14,
+			.max = 14,
+		},
+		.limits[IPA_RESOURCE_GROUP_UL_DL] = {
+			.min = 20,
+			.max = 20,
+		},
+	},
+};
+
+static const struct ipa_resource_dst ipa_resource_dst[] = {
+	{
+		.type = IPA_RESOURCE_TYPE_DST_DATA_SECTORS,
+		.limits[IPA_RESOURCE_GROUP_LWA_DL] = {
+			.min = 4,
+			.max = 4,
+		},
+		.limits[IPA_RESOURCE_GROUP_UL_DL] = {
+			.min = 4,
+			.max = 4,
+		},
+	},
+	{
+		.type = IPA_RESOURCE_TYPE_DST_DPS_DMARS,
+		.limits[IPA_RESOURCE_GROUP_LWA_DL] = {
+			.min = 2,
+			.max = 63,
+		},
+		.limits[IPA_RESOURCE_GROUP_UL_DL] = {
+			.min = 1,
+			.max = 63,
+		},
+	},
+};
+
+/* Resource configuration for the SDM845 SoC. */
+static const struct ipa_resource_data ipa_resource_data = {
+	.resource_src		= ipa_resource_src,
+	.resource_src_count	= ARRAY_SIZE(ipa_resource_src),
+	.resource_dst		= ipa_resource_dst,
+	.resource_dst_count	= ARRAY_SIZE(ipa_resource_dst),
+};
+
+/* Configuration data for the SDM845 SoC. */
+const struct ipa_data ipa_data_sdm845 = {
+	.endpoint_data		= gsi_ipa_endpoint_data,
+	.endpoint_data_count	= ARRAY_SIZE(gsi_ipa_endpoint_data),
+	.resource_data		= &ipa_resource_data,
+};
diff --git a/drivers/net/ipa/ipa_data.h b/drivers/net/ipa/ipa_data.h
new file mode 100644
index 000000000000..f7669f73efc3
--- /dev/null
+++ b/drivers/net/ipa/ipa_data.h
@@ -0,0 +1,267 @@ 
+/* SPDX-License-Identifier: GPL-2.0 */
+
+/* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
+ * Copyright (C) 2019 Linaro Ltd.
+ */
+#ifndef _IPA_DATA_H_
+#define _IPA_DATA_H_
+
+#include <linux/types.h>
+
+#include "ipa_endpoint.h"
+
+/**
+ * DOC: IPA/GSI Configuration Data
+ *
+ * Boot-time configuration data is used to define the configuration of the
+ * IPA and GSI resources to use for a given platform.  This data is supplied
+ * via the Device Tree match table, associated with a particular compatible
+ * string.  The data defines information about resources, endpoints, and
+ * channels.  For endpoints and channels, the configuration data defines how
+ * these hardware entities are initially configured, but in almost all cases,
+ * this configuration never changes.
+ *
+ * Resources are data structures used internally by the IPA hardware.  The
+ * configuration data defines the number (or limits of the number) of various
+ * types of these resources.
+ *
+ * Endpoint configuration data defines properties of both IPA endpoints and
+ * GSI channels.  A channel is a GSI construct, and represents a single
+ * communication path between the IPA and a particular execution environment
+ * (EE), such as the AP or Modem.  Each EE has a set of channels associated
+ * with it, and each channel has an ID unique for that EE.  Only GSI channels
+ * associated with the AP are of concern to this driver.
+ *
+ * An endpoint is an IPA construct representing a single channel anywhere
+ * within the system.  As such, an IPA endpoint ID maps directly to an
+ * (EE, channel_id) pair.  Generally, this driver is concerned with only
+ * endpoints associated with the AP, however this will change when support
+ * for routing (etc.) is added.  IPA endpoint and GSI channel configuration
+ * data are defined together, establishing the endpoint_id->(EE, channel_id)
+ * mapping.
+ *
+ * Endpoint configuration data consists of three parts:  properties that
+ * are common to IPA and GSI (EE ID, channel ID, endpoint ID, and direction);
+ * properties associated with the GSI channel; and properties associated with
+ * the IPA endpoint.
+ */
+
+/**
+ * struct gsi_channel_data - GSI channel configuration data
+ * @tlv_count:		number of entries in channel's TLV FIFO
+ * @wrr_priority:	whether channel gets priority (AP command TX only)
+ * @tre_count:		number of TREs in the channel ring
+ * @event_count:	number of slots in the associated event ring
+ *
+ * A GSI channel is a unidirectional means of transferring data to or from
+ * (and through) the IPA.  A GSI channel has a fixed number of "transfer
+ * elements" (TREs) that specify individual commands.  A set of commands
+ * are provided to a GSI channel, and when they complete the GSI generates
+ * an event (and an interrupt) to signal their completion.  These event
+ * structures are managed in a fixed-size event ring.
+ *
+ * Each GSI channel is fed by a FIFO if type/length/value (TLV) structures,
+ * and the number of entries in this FIFO limits the number of TREs that can
+ * be included in a single transaction.
+ *
+ * The GSI does weighted round-robin servicing of its channels, and it's
+ * possible to adjust a channel's priority of service.  Only the AP command
+ * TX channel specifies that it should get priority.
+ */
+struct gsi_channel_data {
+	u32 tlv_count;
+
+	u32 wrr_priority;
+	u32 tre_count;
+	u32 event_count;
+};
+
+/**
+ * struct ipa_endpoint_tx_data - configuration data for TX endpoints
+ * @delay:		whether endpoint starts in delay mode
+ * @status_endpoint:	endpoint to which status elements are sent
+ *
+ * Delay mode prevents an endpoint from transmitting anything, even if
+ * commands have been presented to the hardware.  Once the endpoint exits
+ * delay mode, queued transfer commands are sent.
+ *
+ * The @status_endpoint is only valid if the endpoint's @status_enable
+ * flag is set.
+ */
+struct ipa_endpoint_tx_data {
+	u32 delay;
+	enum ipa_endpoint_id status_endpoint;
+};
+
+/**
+ * struct ipa_endpoint_rx_data - configuration data for RX endpoints
+ * @pad_align:	power-of-2 boundary to which packet payload is aligned
+ * @aggr_close_eof: whether aggregation closes on end-of-frame
+ *
+ * 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.  One of those criteria is the sender indicating
+ * a "frame" consisting of several transfers has ended.
+ */
+struct ipa_endpoint_rx_data {
+	u32 pad_align;
+	u32 aggr_close_eof;
+};
+
+/**
+ * struct ipa_endpoint_config_data - IPA endpoint hardware configuration
+ * @checksum:		whether checksum offload is enabled
+ * @qmap:		whether endpoint uses QMAP protocol
+ * @aggregation:	whether endpoint supports aggregation
+ * @dma_mode:		whether endpoint operates in DMA mode
+ * @dma_endpoint:	peer endpoint, if operating in DMA mode
+ * @status_enable:	whether status elements are generated for endpoint
+ * @tx:			TX-specific endpoint information (see above)
+ * @rx:			RX-specific endpoint information (see above)
+ */
+struct ipa_endpoint_config_data {
+	u32 checksum;
+	u32 qmap;
+	u32 aggregation;
+	u32 dma_mode;
+	enum ipa_endpoint_id dma_endpoint;
+	u32 status_enable;
+	union {
+		struct ipa_endpoint_tx_data tx;
+		struct ipa_endpoint_rx_data rx;
+	};
+};
+
+/**
+ * struct ipa_endpoint_data - IPA endpoint configuration data
+ * @support_flt:	whether endpoint supports filtering
+ * @seq_type:		hardware sequencer type used for endpoint
+ * @config:		hardware configuration (see above)
+ *
+ * Not all endpoints support the IPA filtering capability.  A filter table
+ * defines the filters to apply for those endpoints that support it.  The
+ * AP is responsible for initializing this table, and it must include entries
+ * for non-AP endpoints.  For this reason we define *all* endpoints used
+ * in the system, and indicate whether they support filtering.
+ *
+ * The remaining endpoint configuration data applies only to AP endpoints.
+ * The IPA hardware is implemented by sequencers, and the AP must program
+ * the type(s) of these sequencers at initialization time.  The remaining
+ * endpoint configuration data is defined above.
+ */
+struct ipa_endpoint_data {
+	u32 support_flt;
+	/* The rest are specified only for AP endpoints */
+	enum ipa_seq_type seq_type;
+	struct ipa_endpoint_config_data config;
+};
+
+/**
+ * struct gsi_ipa_endpoint_data - GSI channel/IPA endpoint data
+ * ee:		GSI execution environment ID
+ * channel_id:	GSI channel ID
+ * endpoint_id:	IPA endpoint ID
+ * toward_ipa:	direction of data transfer
+ * gsi:		GSI channel configuration data (see above)
+ * ipa:		IPA endpoint configuration data (see above)
+ */
+struct gsi_ipa_endpoint_data {
+	u32 ee_id;
+	u32 channel_id;
+	enum ipa_endpoint_id endpoint_id;
+	u32 toward_ipa;
+
+	struct gsi_channel_data channel;
+	struct ipa_endpoint_data endpoint;
+};
+
+/** enum ipa_resource_group - IPA resource group */
+enum ipa_resource_group {
+	IPA_RESOURCE_GROUP_LWA_DL,	/* currently not used */
+	IPA_RESOURCE_GROUP_UL_DL,
+	IPA_RESOURCE_GROUP_MAX,
+};
+
+/** enum ipa_resource_type_src - source resource types */
+enum ipa_resource_type_src {
+	IPA_RESOURCE_TYPE_SRC_PKT_CONTEXTS,
+	IPA_RESOURCE_TYPE_SRC_DESCRIPTOR_LISTS,
+	IPA_RESOURCE_TYPE_SRC_DESCRIPTOR_BUFF,
+	IPA_RESOURCE_TYPE_SRC_HPS_DMARS,
+	IPA_RESOURCE_TYPE_SRC_ACK_ENTRIES,
+};
+
+/** enum ipa_resource_type_dst - destination resource types */
+enum ipa_resource_type_dst {
+	IPA_RESOURCE_TYPE_DST_DATA_SECTORS,
+	IPA_RESOURCE_TYPE_DST_DPS_DMARS,
+};
+
+/**
+ * struct ipa_resource_limits - minimum and maximum resource counts
+ * @min:	minimum number of resources of a given type
+ * @max:	maximum number of resources of a given type
+ */
+struct ipa_resource_limits {
+	u32 min;
+	u32 max;
+};
+
+/**
+ * struct ipa_resource_src - source endpoint group resource usage
+ * @type:	source group resource type
+ * @limits:	array of limits to use for each resource group
+ */
+struct ipa_resource_src {
+	enum ipa_resource_type_src type;
+	struct ipa_resource_limits limits[IPA_RESOURCE_GROUP_MAX];
+};
+
+/**
+ * struct ipa_resource_dst - destination endpoint group resource usage
+ * @type:	destination group resource type
+ * @limits:	array of limits to use for each resource group
+ */
+struct ipa_resource_dst {
+	enum ipa_resource_type_dst type;
+	struct ipa_resource_limits limits[IPA_RESOURCE_GROUP_MAX];
+};
+
+/**
+ * struct ipa_resource_data - IPA resource configuration data
+ * @resource_src:	source endpoint group resources
+ * @resource_src_count:	number of entries in the resource_src array
+ * @resource_dst:	destination endpoint group resources
+ * @resource_dst_count:	number of entries in the resource_dst array
+ *
+ * In order to manage quality of service between endpoints, certain resources
+ * required for operation are allocated to groups of endpoints.  Generally
+ * this information is invisible to the AP, but the AP is responsible for
+ * programming it at initialization time, so we specify it here.
+ */
+struct ipa_resource_data {
+	const struct ipa_resource_src *resource_src;
+	u32 resource_src_count;
+	const struct ipa_resource_dst *resource_dst;
+	u32 resource_dst_count;
+};
+
+/**
+ * struct ipa_data - combined IPA/GSI configuration data
+ * @resource_data:		IPA resource configuration data
+ * @endpoint_data:		IPA endpoint/GSI channel data
+ * @endpoint_data_count:	number of entries in endpoint_data array
+ */
+struct ipa_data {
+	const struct ipa_resource_data *resource_data;
+	const struct gsi_ipa_endpoint_data *endpoint_data;
+	u32 endpoint_data_count;	/* # entries in endpoint_data[] */
+};
+
+extern const struct ipa_data ipa_data_sdm845;
+
+#endif /* _IPA_DATA_H_ */