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cf412ec333
IPA can route packets between IPA-connected entities. The AP and
modem are currently the only such entities supported, and no routing
is required to transfer packets between them.
The number of entries in each routing table is fixed, and defined at
initialization time. Some of these entries are designated for use
by the modem, and the rest are available for the AP to use. The AP
sends a QMI message to the modem which describes (among other
things) information about routing table memory available for the
modem to use.
Currently the QMI initialization packet gives wrong information in
its description of routing tables. What *should* be supplied is the
maximum index that the modem can use for the routing table memory
located at a given location. The current code instead supplies the
total *number* of routing table entries. Furthermore, the modem is
granted the entire table, not just the subset it's supposed to use.
This patch fixes this. First, the ipa_mem_bounds structure is
generalized so its "end" field can be interpreted either as a final
byte offset, or a final array index. Second, the IPv4 and IPv6
(non-hashed and hashed) table information fields in the QMI
ipa_init_modem_driver_req structure are changed to be ipa_mem_bounds
rather than ipa_mem_array structures. Third, we set the "end" value
for each routing table to be the last index, rather than setting the
"count" to be the number of indices. Finally, instead of allowing
the modem to use all of a routing table's memory, it is limited to
just the portion meant to be used by the modem. In all versions of
IPA currently supported, that is IPA_ROUTE_MODEM_COUNT (8) entries.
Update a few comments for clarity.
Fixes: 530f9216a9 ("soc: qcom: ipa: AP/modem communications")
Signed-off-by: Alex Elder <elder@linaro.org>
Link: https://lore.kernel.org/r/20220913204602.1803004-1-elder@linaro.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
261 lines
9 KiB
C
261 lines
9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright (c) 2018, The Linux Foundation. All rights reserved.
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* Copyright (C) 2018-2020 Linaro Ltd.
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*/
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#ifndef _IPA_QMI_MSG_H_
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#define _IPA_QMI_MSG_H_
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/* === Only "ipa_qmi" and "ipa_qmi_msg.c" should include this file === */
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#include <linux/types.h>
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#include <linux/soc/qcom/qmi.h>
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/* Request/response/indication QMI message ids used for IPA. Receiving
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* end issues a response for requests; indications require no response.
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*/
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#define IPA_QMI_INDICATION_REGISTER 0x20 /* modem -> AP request */
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#define IPA_QMI_INIT_DRIVER 0x21 /* AP -> modem request */
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#define IPA_QMI_INIT_COMPLETE 0x22 /* AP -> modem indication */
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#define IPA_QMI_DRIVER_INIT_COMPLETE 0x35 /* modem -> AP request */
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/* The maximum size required for message types. These sizes include
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* the message data, along with type (1 byte) and length (2 byte)
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* information for each field. The qmi_send_*() interfaces require
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* the message size to be provided.
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*/
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#define IPA_QMI_INDICATION_REGISTER_REQ_SZ 20 /* -> server handle */
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#define IPA_QMI_INDICATION_REGISTER_RSP_SZ 7 /* <- server handle */
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#define IPA_QMI_INIT_DRIVER_REQ_SZ 162 /* client handle -> */
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#define IPA_QMI_INIT_DRIVER_RSP_SZ 25 /* client handle <- */
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#define IPA_QMI_INIT_COMPLETE_IND_SZ 7 /* <- server handle */
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#define IPA_QMI_DRIVER_INIT_COMPLETE_REQ_SZ 4 /* -> server handle */
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#define IPA_QMI_DRIVER_INIT_COMPLETE_RSP_SZ 7 /* <- server handle */
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/* Maximum size of messages we expect the AP to receive (max of above) */
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#define IPA_QMI_SERVER_MAX_RCV_SZ 8
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#define IPA_QMI_CLIENT_MAX_RCV_SZ 25
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/* Request message for the IPA_QMI_INDICATION_REGISTER request */
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struct ipa_indication_register_req {
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u8 master_driver_init_complete_valid;
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u8 master_driver_init_complete;
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u8 data_usage_quota_reached_valid;
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u8 data_usage_quota_reached;
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u8 ipa_mhi_ready_ind_valid;
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u8 ipa_mhi_ready_ind;
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u8 endpoint_desc_ind_valid;
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u8 endpoint_desc_ind;
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u8 bw_change_ind_valid;
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u8 bw_change_ind;
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};
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/* The response to a IPA_QMI_INDICATION_REGISTER request consists only of
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* a standard QMI response.
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*/
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struct ipa_indication_register_rsp {
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struct qmi_response_type_v01 rsp;
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};
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/* Request message for the IPA_QMI_DRIVER_INIT_COMPLETE request */
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struct ipa_driver_init_complete_req {
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u8 status;
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};
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/* The response to a IPA_QMI_DRIVER_INIT_COMPLETE request consists only
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* of a standard QMI response.
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*/
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struct ipa_driver_init_complete_rsp {
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struct qmi_response_type_v01 rsp;
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};
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/* The message for the IPA_QMI_INIT_COMPLETE_IND indication consists
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* only of a standard QMI response.
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*/
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struct ipa_init_complete_ind {
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struct qmi_response_type_v01 status;
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};
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/* The AP tells the modem its platform type. We assume Android. */
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enum ipa_platform_type {
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IPA_QMI_PLATFORM_TYPE_INVALID = 0x0, /* Invalid */
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IPA_QMI_PLATFORM_TYPE_TN = 0x1, /* Data card */
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IPA_QMI_PLATFORM_TYPE_LE = 0x2, /* Data router */
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IPA_QMI_PLATFORM_TYPE_MSM_ANDROID = 0x3, /* Android MSM */
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IPA_QMI_PLATFORM_TYPE_MSM_WINDOWS = 0x4, /* Windows MSM */
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IPA_QMI_PLATFORM_TYPE_MSM_QNX_V01 = 0x5, /* QNX MSM */
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};
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/* This defines the start and end offset of a range of memory. The start
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* value is a byte offset relative to the start of IPA shared memory. The
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* end value is the last addressable unit *within* the range. Typically
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* the end value is in units of bytes, however it can also be a maximum
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* array index value.
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*/
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struct ipa_mem_bounds {
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u32 start;
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u32 end;
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};
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/* This defines the location and size of an array. The start value
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* is an offset relative to the start of IPA shared memory. The
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* size of the array is implied by the number of entries (the entry
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* size is assumed to be known).
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*/
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struct ipa_mem_array {
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u32 start;
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u32 count;
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};
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/* This defines the location and size of a range of memory. The
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* start is an offset relative to the start of IPA shared memory.
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* This differs from the ipa_mem_bounds structure in that the size
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* (in bytes) of the memory region is specified rather than the
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* offset of its last byte.
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*/
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struct ipa_mem_range {
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u32 start;
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u32 size;
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};
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/* The message for the IPA_QMI_INIT_DRIVER request contains information
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* from the AP that affects modem initialization.
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*/
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struct ipa_init_modem_driver_req {
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u8 platform_type_valid;
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u32 platform_type; /* enum ipa_platform_type */
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/* Modem header table information. This defines the IPA shared
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* memory in which the modem may insert header table entries.
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*/
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u8 hdr_tbl_info_valid;
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struct ipa_mem_bounds hdr_tbl_info;
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/* Routing table information. These define the location and maximum
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* *index* (not byte) for the modem portion of non-hashable IPv4 and
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* IPv6 routing tables. The start values are byte offsets relative
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* to the start of IPA shared memory.
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*/
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u8 v4_route_tbl_info_valid;
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struct ipa_mem_bounds v4_route_tbl_info;
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u8 v6_route_tbl_info_valid;
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struct ipa_mem_bounds v6_route_tbl_info;
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/* Filter table information. These define the location of the
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* non-hashable IPv4 and IPv6 filter tables. The start values are
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* byte offsets relative to the start of IPA shared memory.
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*/
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u8 v4_filter_tbl_start_valid;
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u32 v4_filter_tbl_start;
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u8 v6_filter_tbl_start_valid;
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u32 v6_filter_tbl_start;
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/* Modem memory information. This defines the location and
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* size of memory available for the modem to use.
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*/
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u8 modem_mem_info_valid;
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struct ipa_mem_range modem_mem_info;
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/* This defines the destination endpoint on the AP to which
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* the modem driver can send control commands. Must be less
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* than ipa_endpoint_max().
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*/
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u8 ctrl_comm_dest_end_pt_valid;
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u32 ctrl_comm_dest_end_pt;
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/* This defines whether the modem should load the microcontroller
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* or not. It is unnecessary to reload it if the modem is being
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* restarted.
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*
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* NOTE: this field is named "is_ssr_bootup" elsewhere.
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*/
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u8 skip_uc_load_valid;
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u8 skip_uc_load;
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/* Processing context memory information. This defines the memory in
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* which the modem may insert header processing context table entries.
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*/
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u8 hdr_proc_ctx_tbl_info_valid;
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struct ipa_mem_bounds hdr_proc_ctx_tbl_info;
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/* Compression command memory information. This defines the memory
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* in which the modem may insert compression/decompression commands.
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*/
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u8 zip_tbl_info_valid;
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struct ipa_mem_bounds zip_tbl_info;
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/* Routing table information. These define the location and maximum
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* *index* (not byte) for the modem portion of hashable IPv4 and IPv6
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* routing tables (if supported by hardware). The start values are
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* byte offsets relative to the start of IPA shared memory.
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*/
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u8 v4_hash_route_tbl_info_valid;
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struct ipa_mem_bounds v4_hash_route_tbl_info;
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u8 v6_hash_route_tbl_info_valid;
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struct ipa_mem_bounds v6_hash_route_tbl_info;
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/* Filter table information. These define the location and size
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* of hashable IPv4 and IPv6 filter tables (if supported by hardware).
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* The start values are byte offsets relative to the start of IPA
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* shared memory.
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*/
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u8 v4_hash_filter_tbl_start_valid;
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u32 v4_hash_filter_tbl_start;
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u8 v6_hash_filter_tbl_start_valid;
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u32 v6_hash_filter_tbl_start;
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/* Statistics information. These define the locations of the
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* first and last statistics sub-regions. (IPA v4.0 and above)
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*/
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u8 hw_stats_quota_base_addr_valid;
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u32 hw_stats_quota_base_addr;
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u8 hw_stats_quota_size_valid;
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u32 hw_stats_quota_size;
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u8 hw_stats_drop_base_addr_valid;
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u32 hw_stats_drop_base_addr;
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u8 hw_stats_drop_size_valid;
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u32 hw_stats_drop_size;
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};
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/* The response to a IPA_QMI_INIT_DRIVER request begins with a standard
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* QMI response, but contains other information as well. Currently we
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* simply wait for the INIT_DRIVER transaction to complete and
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* ignore any other data that might be returned.
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*/
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struct ipa_init_modem_driver_rsp {
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struct qmi_response_type_v01 rsp;
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/* This defines the destination endpoint on the modem to which
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* the AP driver can send control commands. Must be less than
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* ipa_endpoint_max().
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*/
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u8 ctrl_comm_dest_end_pt_valid;
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u32 ctrl_comm_dest_end_pt;
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/* This defines the default endpoint. The AP driver is not
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* required to configure the hardware with this value. Must
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* be less than ipa_endpoint_max().
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*/
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u8 default_end_pt_valid;
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u32 default_end_pt;
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/* This defines whether a second handshake is required to complete
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* initialization.
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*/
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u8 modem_driver_init_pending_valid;
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u8 modem_driver_init_pending;
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};
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/* Message structure definitions defined in "ipa_qmi_msg.c" */
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extern struct qmi_elem_info ipa_indication_register_req_ei[];
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extern struct qmi_elem_info ipa_indication_register_rsp_ei[];
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extern struct qmi_elem_info ipa_driver_init_complete_req_ei[];
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extern struct qmi_elem_info ipa_driver_init_complete_rsp_ei[];
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extern struct qmi_elem_info ipa_init_complete_ind_ei[];
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extern struct qmi_elem_info ipa_mem_bounds_ei[];
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extern struct qmi_elem_info ipa_mem_array_ei[];
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extern struct qmi_elem_info ipa_mem_range_ei[];
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extern struct qmi_elem_info ipa_init_modem_driver_req_ei[];
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extern struct qmi_elem_info ipa_init_modem_driver_rsp_ei[];
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#endif /* !_IPA_QMI_MSG_H_ */
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