| /* Copyright (c) 2012-2016, The Linux Foundation. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 and |
| * only version 2 as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| */ |
| |
| #define pr_fmt(fmt) "AXI: %s(): " fmt, __func__ |
| |
| #include "msm_bus_core.h" |
| #include <linux/msm-bus.h> |
| #include <linux/msm-bus-board.h> |
| #include <soc/qcom/rpm-smd.h> |
| |
| /* Stubs for backward compatibility */ |
| void msm_bus_rpm_set_mt_mask(void) |
| { |
| } |
| |
| bool msm_bus_rpm_is_mem_interleaved(void) |
| { |
| return true; |
| } |
| |
| struct commit_data { |
| struct msm_bus_node_hw_info *mas_arb; |
| struct msm_bus_node_hw_info *slv_arb; |
| }; |
| |
| #ifdef CONFIG_DEBUG_FS |
| void msm_bus_rpm_fill_cdata_buffer(int *curr, char *buf, const int max_size, |
| void *cdata, int nmasters, int nslaves, int ntslaves) |
| { |
| int c; |
| struct commit_data *cd = (struct commit_data *)cdata; |
| |
| *curr += scnprintf(buf + *curr, max_size - *curr, "\nMas BW:\n"); |
| for (c = 0; c < nmasters; c++) |
| *curr += scnprintf(buf + *curr, max_size - *curr, |
| "%d: %llu\t", cd->mas_arb[c].hw_id, |
| cd->mas_arb[c].bw); |
| *curr += scnprintf(buf + *curr, max_size - *curr, "\nSlave BW:\n"); |
| for (c = 0; c < nslaves; c++) { |
| *curr += scnprintf(buf + *curr, max_size - *curr, |
| "%d: %llu\t", cd->slv_arb[c].hw_id, |
| cd->slv_arb[c].bw); |
| } |
| } |
| #endif |
| |
| static int msm_bus_rpm_compare_cdata( |
| struct msm_bus_fabric_registration *fab_pdata, |
| struct commit_data *cd1, struct commit_data *cd2) |
| { |
| size_t n; |
| int ret; |
| |
| n = sizeof(struct msm_bus_node_hw_info) * fab_pdata->nmasters * 2; |
| ret = memcmp(cd1->mas_arb, cd2->mas_arb, n); |
| if (ret) { |
| MSM_BUS_DBG("Master Arb Data not equal\n"); |
| return ret; |
| } |
| |
| n = sizeof(struct msm_bus_node_hw_info) * fab_pdata->nslaves * 2; |
| ret = memcmp(cd1->slv_arb, cd2->slv_arb, n); |
| if (ret) { |
| MSM_BUS_DBG("Master Arb Data not equal\n"); |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| static int msm_bus_rpm_req(int ctx, uint32_t rsc_type, uint32_t key, |
| struct msm_bus_node_hw_info *hw_info, bool valid) |
| { |
| struct msm_rpm_request *rpm_req; |
| int ret = 0, msg_id; |
| |
| if (ctx == ACTIVE_CTX) |
| ctx = MSM_RPM_CTX_ACTIVE_SET; |
| else if (ctx == DUAL_CTX) |
| ctx = MSM_RPM_CTX_SLEEP_SET; |
| |
| rpm_req = msm_rpm_create_request(ctx, rsc_type, hw_info->hw_id, 1); |
| if (rpm_req == NULL) { |
| MSM_BUS_WARN("RPM: Couldn't create RPM Request\n"); |
| return -ENXIO; |
| } |
| |
| if (valid) { |
| ret = msm_rpm_add_kvp_data(rpm_req, key, (const uint8_t *) |
| &hw_info->bw, (int)(sizeof(uint64_t))); |
| if (ret) { |
| MSM_BUS_WARN("RPM: Add KVP failed for RPM Req:%u\n", |
| rsc_type); |
| goto free_rpm_request; |
| } |
| |
| MSM_BUS_DBG("Added Key: %d, Val: %llu, size: %zu\n", key, |
| hw_info->bw, sizeof(uint64_t)); |
| } else { |
| /* Invalidate RPM requests */ |
| ret = msm_rpm_add_kvp_data(rpm_req, 0, NULL, 0); |
| if (ret) { |
| MSM_BUS_WARN("RPM: Add KVP failed for RPM Req:%u\n", |
| rsc_type); |
| goto free_rpm_request; |
| } |
| } |
| |
| msg_id = msm_rpm_send_request(rpm_req); |
| if (!msg_id) { |
| MSM_BUS_WARN("RPM: No message ID for req\n"); |
| ret = -ENXIO; |
| goto free_rpm_request; |
| } |
| |
| ret = msm_rpm_wait_for_ack(msg_id); |
| if (ret) { |
| MSM_BUS_WARN("RPM: Ack failed\n"); |
| goto free_rpm_request; |
| } |
| |
| free_rpm_request: |
| msm_rpm_free_request(rpm_req); |
| |
| return ret; |
| } |
| |
| static int msm_bus_rpm_commit_arb(struct msm_bus_fabric_registration |
| *fab_pdata, int ctx, void *rpm_data, |
| struct commit_data *cd, bool valid) |
| { |
| int i, status = 0, rsc_type, key; |
| |
| MSM_BUS_DBG("Context: %d\n", ctx); |
| rsc_type = RPM_BUS_MASTER_REQ; |
| key = RPM_MASTER_FIELD_BW; |
| for (i = 0; i < fab_pdata->nmasters; i++) { |
| if (!cd->mas_arb[i].dirty) |
| continue; |
| |
| MSM_BUS_DBG("MAS HWID: %d, BW: %llu DIRTY: %d\n", |
| cd->mas_arb[i].hw_id, |
| cd->mas_arb[i].bw, |
| cd->mas_arb[i].dirty); |
| status = msm_bus_rpm_req(ctx, rsc_type, key, |
| &cd->mas_arb[i], valid); |
| if (status) { |
| MSM_BUS_ERR("RPM: Req fail: mas:%d, bw:%llu\n", |
| cd->mas_arb[i].hw_id, |
| cd->mas_arb[i].bw); |
| break; |
| cd->mas_arb[i].dirty = false; |
| } |
| |
| rsc_type = RPM_BUS_SLAVE_REQ; |
| key = RPM_SLAVE_FIELD_BW; |
| for (i = 0; i < fab_pdata->nslaves; i++) { |
| if (!cd->slv_arb[i].dirty) |
| continue; |
| |
| MSM_BUS_DBG("SLV HWID: %d, BW: %llu DIRTY: %d\n", |
| cd->slv_arb[i].hw_id, |
| cd->slv_arb[i].bw, |
| cd->slv_arb[i].dirty); |
| status = msm_bus_rpm_req(ctx, rsc_type, key, |
| &cd->slv_arb[i], valid); |
| if (status) { |
| MSM_BUS_ERR("RPM: Req fail: slv:%d, bw:%llu\n", |
| cd->slv_arb[i].hw_id, |
| cd->slv_arb[i].bw); |
| break; |
| cd->slv_arb[i].dirty = false; |
| } |
| |
| return status; |
| } |
| |
| /** |
| * msm_bus_remote_hw_commit() - Commit the arbitration data to RPM |
| * @fabric: Fabric for which the data should be committed |
| **/ |
| int msm_bus_remote_hw_commit(struct msm_bus_fabric_registration |
| *fab_pdata, void *hw_data, void **cdata) |
| { |
| |
| int ret; |
| bool valid; |
| struct commit_data *dual_cd, *act_cd; |
| void *rpm_data = hw_data; |
| |
| MSM_BUS_DBG("\nReached RPM Commit\n"); |
| dual_cd = (struct commit_data *)cdata[DUAL_CTX]; |
| act_cd = (struct commit_data *)cdata[ACTIVE_CTX]; |
| |
| /* |
| * If the arb data for active set and sleep set is |
| * different, commit both sets. |
| * If the arb data for active set and sleep set is |
| * the same, invalidate the sleep set. |
| */ |
| ret = msm_bus_rpm_compare_cdata(fab_pdata, act_cd, dual_cd); |
| if (!ret) |
| /* Invalidate sleep set.*/ |
| valid = false; |
| else |
| valid = true; |
| |
| ret = msm_bus_rpm_commit_arb(fab_pdata, DUAL_CTX, rpm_data, |
| dual_cd, valid); |
| if (ret) |
| MSM_BUS_ERR("Error comiting fabric:%d in %d ctx\n", |
| fab_pdata->id, DUAL_CTX); |
| |
| valid = true; |
| ret = msm_bus_rpm_commit_arb(fab_pdata, ACTIVE_CTX, rpm_data, act_cd, |
| valid); |
| if (ret) |
| MSM_BUS_ERR("Error comiting fabric:%d in %d ctx\n", |
| fab_pdata->id, ACTIVE_CTX); |
| |
| return ret; |
| } |
| |
| int msm_bus_rpm_hw_init(struct msm_bus_fabric_registration *pdata, |
| struct msm_bus_hw_algorithm *hw_algo) |
| { |
| if (!pdata->ahb) |
| pdata->rpm_enabled = 1; |
| return 0; |
| } |