diff options
Diffstat (limited to 'drivers/interconnect/qcom/icc-rpmh.h')
| -rw-r--r-- | drivers/interconnect/qcom/icc-rpmh.h | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/drivers/interconnect/qcom/icc-rpmh.h b/drivers/interconnect/qcom/icc-rpmh.h new file mode 100644 index 000000000000..903d25e61984 --- /dev/null +++ b/drivers/interconnect/qcom/icc-rpmh.h @@ -0,0 +1,149 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (c) 2020, The Linux Foundation. All rights reserved. + */ + +#ifndef __DRIVERS_INTERCONNECT_QCOM_ICC_RPMH_H__ +#define __DRIVERS_INTERCONNECT_QCOM_ICC_RPMH_H__ + +#define to_qcom_provider(_provider) \ + container_of(_provider, struct qcom_icc_provider, provider) + +/** + * struct qcom_icc_provider - Qualcomm specific interconnect provider + * @provider: generic interconnect provider + * @dev: reference to the NoC device + * @bcms: list of bcms that maps to the provider + * @num_bcms: number of @bcms + * @voter: bcm voter targeted by this provider + */ +struct qcom_icc_provider { + struct icc_provider provider; + struct device *dev; + struct qcom_icc_bcm **bcms; + size_t num_bcms; + struct bcm_voter *voter; +}; + +/** + * struct bcm_db - Auxiliary data pertaining to each Bus Clock Manager (BCM) + * @unit: divisor used to convert bytes/sec bw value to an RPMh msg + * @width: multiplier used to convert bytes/sec bw value to an RPMh msg + * @vcd: virtual clock domain that this bcm belongs to + * @reserved: reserved field + */ +struct bcm_db { + __le32 unit; + __le16 width; + u8 vcd; + u8 reserved; +}; + +#define MAX_LINKS 128 +#define MAX_BCMS 64 +#define MAX_BCM_PER_NODE 3 +#define MAX_VCD 10 + +/* + * The AMC bucket denotes constraints that are applied to hardware when + * icc_set_bw() completes, whereas the WAKE and SLEEP constraints are applied + * when the execution environment transitions between active and low power mode. + */ +#define QCOM_ICC_BUCKET_AMC 0 +#define QCOM_ICC_BUCKET_WAKE 1 +#define QCOM_ICC_BUCKET_SLEEP 2 +#define QCOM_ICC_NUM_BUCKETS 3 +#define QCOM_ICC_TAG_AMC BIT(QCOM_ICC_BUCKET_AMC) +#define QCOM_ICC_TAG_WAKE BIT(QCOM_ICC_BUCKET_WAKE) +#define QCOM_ICC_TAG_SLEEP BIT(QCOM_ICC_BUCKET_SLEEP) +#define QCOM_ICC_TAG_ACTIVE_ONLY (QCOM_ICC_TAG_AMC | QCOM_ICC_TAG_WAKE) +#define QCOM_ICC_TAG_ALWAYS (QCOM_ICC_TAG_AMC | QCOM_ICC_TAG_WAKE |\ + QCOM_ICC_TAG_SLEEP) + +/** + * struct qcom_icc_node - Qualcomm specific interconnect nodes + * @name: the node name used in debugfs + * @links: an array of nodes where we can go next while traversing + * @id: a unique node identifier + * @num_links: the total number of @links + * @channels: num of channels at this node + * @buswidth: width of the interconnect between a node and the bus + * @sum_avg: current sum aggregate value of all avg bw requests + * @max_peak: current max aggregate value of all peak bw requests + * @bcms: list of bcms associated with this logical node + * @num_bcms: num of @bcms + */ +struct qcom_icc_node { + const char *name; + u16 links[MAX_LINKS]; + u16 id; + u16 num_links; + u16 channels; + u16 buswidth; + u64 sum_avg[QCOM_ICC_NUM_BUCKETS]; + u64 max_peak[QCOM_ICC_NUM_BUCKETS]; + struct qcom_icc_bcm *bcms[MAX_BCM_PER_NODE]; + size_t num_bcms; +}; + +/** + * struct qcom_icc_bcm - Qualcomm specific hardware accelerator nodes + * known as Bus Clock Manager (BCM) + * @name: the bcm node name used to fetch BCM data from command db + * @type: latency or bandwidth bcm + * @addr: address offsets used when voting to RPMH + * @vote_x: aggregated threshold values, represents sum_bw when @type is bw bcm + * @vote_y: aggregated threshold values, represents peak_bw when @type is bw bcm + * @dirty: flag used to indicate whether the bcm needs to be committed + * @keepalive: flag used to indicate whether a keepalive is required + * @aux_data: auxiliary data used when calculating threshold values and + * communicating with RPMh + * @list: used to link to other bcms when compiling lists for commit + * @ws_list: used to keep track of bcms that may transition between wake/sleep + * @num_nodes: total number of @num_nodes + * @nodes: list of qcom_icc_nodes that this BCM encapsulates + */ +struct qcom_icc_bcm { + const char *name; + u32 type; + u32 addr; + u64 vote_x[QCOM_ICC_NUM_BUCKETS]; + u64 vote_y[QCOM_ICC_NUM_BUCKETS]; + bool dirty; + bool keepalive; + struct bcm_db aux_data; + struct list_head list; + struct list_head ws_list; + size_t num_nodes; + struct qcom_icc_node *nodes[]; +}; + +struct qcom_icc_fabric { + struct qcom_icc_node **nodes; + size_t num_nodes; +}; + +struct qcom_icc_desc { + struct qcom_icc_node **nodes; + size_t num_nodes; + struct qcom_icc_bcm **bcms; + size_t num_bcms; +}; + +#define DEFINE_QNODE(_name, _id, _channels, _buswidth, ...) \ + static struct qcom_icc_node _name = { \ + .id = _id, \ + .name = #_name, \ + .channels = _channels, \ + .buswidth = _buswidth, \ + .num_links = ARRAY_SIZE(((int[]){ __VA_ARGS__ })), \ + .links = { __VA_ARGS__ }, \ + } + +int qcom_icc_aggregate(struct icc_node *node, u32 tag, u32 avg_bw, + u32 peak_bw, u32 *agg_avg, u32 *agg_peak); +int qcom_icc_set(struct icc_node *src, struct icc_node *dst); +int qcom_icc_bcm_init(struct qcom_icc_bcm *bcm, struct device *dev); +void qcom_icc_pre_aggregate(struct icc_node *node); + +#endif |