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lib: utils: Add MPXY client driver for RPMI MM service group

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Add necessary infra for implementing RPMI Management Mode
service group on platform microcontroller.

Co-authored-by: Sunil V L <sunilvl@oss.qualcomm.com>
Signed-off-by: Ranbir Singh <ranbir.singh@oss.qualcomm.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20260225061347.1396504-1-ranbir.singh@oss.qualcomm.com
Signed-off-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Ranbir Singh
2026-02-25 11:43:47 +05:30
committed by Anup Patel
parent 2bf0de88c8
commit 0b041e58c0
5 changed files with 161 additions and 0 deletions
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116
lib/utils/mpxy/fdt_mpxy_rpmi_mm.c Normal file
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/*
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2026 Qualcomm Technologies, Inc.
*
* Authors:
* Ranbir Singh <ranbir.singh@oss.qualcomm.com>
* Sunil V L <sunilvl@oss.qualcomm.com>
*/
#include <sbi_utils/mpxy/fdt_mpxy_rpmi_mbox.h>
#include <sbi_utils/mailbox/rpmi_mailbox.h>
static struct rpmi_mm_get_attributes_rsp rsp;
static struct mpxy_rpmi_service_data mm_srvcdata[] = {
[0] {
.id = RPMI_MM_SRV_GET_ATTRIBUTES,
.min_tx_len = 0,
.max_tx_len = 0,
.min_rx_len = sizeof(struct rpmi_mm_get_attributes_rsp),
.max_rx_len = sizeof(struct rpmi_mm_get_attributes_rsp),
},
[1] {
.id = RPMI_MM_SRV_COMMUNICATE,
.min_tx_len = sizeof(struct rpmi_mm_communicate_req),
.max_tx_len = sizeof(struct rpmi_mm_communicate_req),
.min_rx_len = sizeof(struct rpmi_mm_communicate_rsp),
.max_rx_len = sizeof(struct rpmi_mm_communicate_rsp),
},
};
static int mpxy_rpmi_mm_setup(void **context, struct mbox_chan *chan,
const struct mpxy_rpmi_mbox_data *data)
{
unsigned long mm_region_addr = 0;
unsigned long mm_region_size = 0;
unsigned long mm_region_flags;
int rc = 0;
rc = rpmi_normal_request_with_status(chan, RPMI_MM_SRV_GET_ATTRIBUTES,
NULL, 0, 0, &rsp,
rpmi_u32_count(rsp),
rpmi_u32_count(rsp));
if (rc)
return rc;
#if __riscv_xlen == 32
mm_region_addr = rsp.mma.shmem_addr_lo;
#else
mm_region_addr = ((unsigned long)(rsp.mma.shmem_addr_hi) << 32) |
rsp.mma.shmem_addr_lo;
#endif
mm_region_size = rsp.mma.shmem_size;
mm_region_flags = SBI_DOMAIN_MEMREGION_SHARED_SURW_MRW;
rc = sbi_domain_root_add_memrange(mm_region_addr, mm_region_size,
PAGE_SIZE, mm_region_flags);
return rc;
}
static int mpxy_rpmi_mm_xfer(void *context, struct mbox_chan *chan,
struct mbox_xfer *xfer)
{
struct rpmi_message_args *args = xfer->args;
int rc = 0;
if (!xfer->rx || (args->type != RPMI_MSG_NORMAL_REQUEST))
return 0;
switch (args->service_id) {
case RPMI_MM_SRV_GET_ATTRIBUTES:
((u32 *)xfer->rx)[0] = cpu_to_le32(RPMI_SUCCESS);
((u32 *)xfer->rx)[1] = cpu_to_le32(rsp.mma.mm_version);
((u32 *)xfer->rx)[2] = cpu_to_le32(rsp.mma.shmem_addr_lo);
((u32 *)xfer->rx)[3] = cpu_to_le32(rsp.mma.shmem_addr_hi);
((u32 *)xfer->rx)[4] = cpu_to_le32(rsp.mma.shmem_size);
args->rx_data_len = 5 * sizeof(u32);
break;
case RPMI_MM_SRV_COMMUNICATE:
rc = mbox_chan_xfer(chan, xfer);
break;
default:
((u32 *)xfer->rx)[0] = cpu_to_le32(RPMI_ERR_NOTSUPP);
args->rx_data_len = sizeof(u32);
break;
};
return rc;
}
static const struct mpxy_rpmi_mbox_data mm_data = {
.servicegrp_id = RPMI_SRVGRP_MANAGEMENT_MODE,
.num_services = RPMI_MM_SRV_MAX_COUNT,
.service_data = mm_srvcdata,
.setup_group = mpxy_rpmi_mm_setup,
.xfer_group = mpxy_rpmi_mm_xfer,
};
/* one extra blank entry for loop termination while matching */
static const struct fdt_match mm_match[] = {
{
.compatible = "riscv,rpmi-mpxy-mm",
.data = &mm_data,
},
{},
};
const struct fdt_driver fdt_mpxy_rpmi_mm = {
.experimental = true,
.match_table = mm_match,
.init = mpxy_rpmi_mbox_init,
};