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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2022-2023, Advanced Micro Devices, Inc.
*/
#include <linux/module.h>
#include "mcdi.h"
#include "mcdi_functions.h"
int cdx_mcdi_get_num_buses(struct cdx_mcdi *cdx)
{
MCDI_DECLARE_BUF(outbuf, MC_CMD_CDX_BUS_ENUM_BUSES_OUT_LEN);
size_t outlen;
int ret;
ret = cdx_mcdi_rpc(cdx, MC_CMD_CDX_BUS_ENUM_BUSES, NULL, 0,
outbuf, sizeof(outbuf), &outlen);
if (ret)
return ret;
if (outlen != MC_CMD_CDX_BUS_ENUM_BUSES_OUT_LEN)
return -EIO;
return MCDI_DWORD(outbuf, CDX_BUS_ENUM_BUSES_OUT_BUS_COUNT);
}
int cdx_mcdi_get_num_devs(struct cdx_mcdi *cdx, int bus_num)
{
MCDI_DECLARE_BUF(outbuf, MC_CMD_CDX_BUS_ENUM_DEVICES_OUT_LEN);
MCDI_DECLARE_BUF(inbuf, MC_CMD_CDX_BUS_ENUM_DEVICES_IN_LEN);
size_t outlen;
int ret;
MCDI_SET_DWORD(inbuf, CDX_BUS_ENUM_DEVICES_IN_BUS, bus_num);
ret = cdx_mcdi_rpc(cdx, MC_CMD_CDX_BUS_ENUM_DEVICES, inbuf, sizeof(inbuf),
outbuf, sizeof(outbuf), &outlen);
if (ret)
return ret;
if (outlen != MC_CMD_CDX_BUS_ENUM_DEVICES_OUT_LEN)
return -EIO;
return MCDI_DWORD(outbuf, CDX_BUS_ENUM_DEVICES_OUT_DEVICE_COUNT);
}
int cdx_mcdi_get_dev_config(struct cdx_mcdi *cdx,
u8 bus_num, u8 dev_num,
struct cdx_dev_params *dev_params)
{
MCDI_DECLARE_BUF(outbuf, MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_LEN);
MCDI_DECLARE_BUF(inbuf, MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_IN_LEN);
struct resource *res = &dev_params->res[0];
size_t outlen;
u32 req_id;
int ret;
MCDI_SET_DWORD(inbuf, CDX_BUS_GET_DEVICE_CONFIG_IN_BUS, bus_num);
MCDI_SET_DWORD(inbuf, CDX_BUS_GET_DEVICE_CONFIG_IN_DEVICE, dev_num);
ret = cdx_mcdi_rpc(cdx, MC_CMD_CDX_BUS_GET_DEVICE_CONFIG, inbuf, sizeof(inbuf),
outbuf, sizeof(outbuf), &outlen);
if (ret)
return ret;
if (outlen != MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_LEN)
return -EIO;
dev_params->bus_num = bus_num;
dev_params->dev_num = dev_num;
req_id = MCDI_DWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_REQUESTER_ID);
dev_params->req_id = req_id;
dev_params->res_count = 0;
if (MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION0_SIZE) != 0) {
res[dev_params->res_count].start =
MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION0_BASE);
res[dev_params->res_count].end =
MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION0_BASE) +
MCDI_QWORD(outbuf,
CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION0_SIZE) - 1;
res[dev_params->res_count].flags = IORESOURCE_MEM;
dev_params->res_count++;
}
if (MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION1_SIZE) != 0) {
res[dev_params->res_count].start =
MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION1_BASE);
res[dev_params->res_count].end =
MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION1_BASE) +
MCDI_QWORD(outbuf,
CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION1_SIZE) - 1;
res[dev_params->res_count].flags = IORESOURCE_MEM;
dev_params->res_count++;
}
if (MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION2_SIZE) != 0) {
res[dev_params->res_count].start =
MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION2_BASE);
res[dev_params->res_count].end =
MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION2_BASE) +
MCDI_QWORD(outbuf,
CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION2_SIZE) - 1;
res[dev_params->res_count].flags = IORESOURCE_MEM;
dev_params->res_count++;
}
if (MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION3_SIZE) != 0) {
res[dev_params->res_count].start =
MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION3_BASE);
res[dev_params->res_count].end =
MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION3_BASE) +
MCDI_QWORD(outbuf,
CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION3_SIZE) - 1;
res[dev_params->res_count].flags = IORESOURCE_MEM;
dev_params->res_count++;
}
dev_params->vendor = MCDI_WORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_VENDOR_ID);
dev_params->device = MCDI_WORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_DEVICE_ID);
dev_params->subsys_vendor = MCDI_WORD(outbuf,
CDX_BUS_GET_DEVICE_CONFIG_OUT_SUBSYS_VENDOR_ID);
dev_params->subsys_device = MCDI_WORD(outbuf,
CDX_BUS_GET_DEVICE_CONFIG_OUT_SUBSYS_DEVICE_ID);
dev_params->class = MCDI_DWORD(outbuf,
CDX_BUS_GET_DEVICE_CONFIG_OUT_DEVICE_CLASS) & 0xFFFFFF;
dev_params->revision = MCDI_BYTE(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_DEVICE_REVISION);
return 0;
}
int cdx_mcdi_bus_enable(struct cdx_mcdi *cdx, u8 bus_num)
{
MCDI_DECLARE_BUF(inbuf, MC_CMD_CDX_BUS_UP_IN_LEN);
int ret;
MCDI_SET_DWORD(inbuf, CDX_BUS_UP_IN_BUS, bus_num);
ret = cdx_mcdi_rpc(cdx, MC_CMD_CDX_BUS_UP, inbuf, sizeof(inbuf),
NULL, 0, NULL);
return ret;
}
int cdx_mcdi_bus_disable(struct cdx_mcdi *cdx, u8 bus_num)
{
MCDI_DECLARE_BUF(inbuf, MC_CMD_CDX_BUS_DOWN_IN_LEN);
int ret;
MCDI_SET_DWORD(inbuf, CDX_BUS_DOWN_IN_BUS, bus_num);
ret = cdx_mcdi_rpc(cdx, MC_CMD_CDX_BUS_DOWN, inbuf, sizeof(inbuf),
NULL, 0, NULL);
return ret;
}
int cdx_mcdi_reset_device(struct cdx_mcdi *cdx, u8 bus_num, u8 dev_num)
{
MCDI_DECLARE_BUF(inbuf, MC_CMD_CDX_DEVICE_RESET_IN_LEN);
int ret;
MCDI_SET_DWORD(inbuf, CDX_DEVICE_RESET_IN_BUS, bus_num);
MCDI_SET_DWORD(inbuf, CDX_DEVICE_RESET_IN_DEVICE, dev_num);
ret = cdx_mcdi_rpc(cdx, MC_CMD_CDX_DEVICE_RESET, inbuf, sizeof(inbuf),
NULL, 0, NULL);
return ret;
}
static int cdx_mcdi_ctrl_flag_get(struct cdx_mcdi *cdx, u8 bus_num,
u8 dev_num, u32 *flags)
{
MCDI_DECLARE_BUF(inbuf, MC_CMD_CDX_DEVICE_CONTROL_GET_IN_LEN);
MCDI_DECLARE_BUF(outbuf, MC_CMD_CDX_DEVICE_CONTROL_GET_OUT_LEN);
size_t outlen;
int ret;
MCDI_SET_DWORD(inbuf, CDX_DEVICE_CONTROL_GET_IN_BUS, bus_num);
MCDI_SET_DWORD(inbuf, CDX_DEVICE_CONTROL_GET_IN_DEVICE, dev_num);
ret = cdx_mcdi_rpc(cdx, MC_CMD_CDX_DEVICE_CONTROL_GET, inbuf,
sizeof(inbuf), outbuf, sizeof(outbuf), &outlen);
if (ret)
return ret;
if (outlen != MC_CMD_CDX_DEVICE_CONTROL_GET_OUT_LEN)
return -EIO;
*flags = MCDI_DWORD(outbuf, CDX_DEVICE_CONTROL_GET_OUT_FLAGS);
return 0;
}
static int cdx_mcdi_ctrl_flag_set(struct cdx_mcdi *cdx, u8 bus_num,
u8 dev_num, bool enable, int bit_pos)
{
MCDI_DECLARE_BUF(inbuf, MC_CMD_CDX_DEVICE_CONTROL_SET_IN_LEN);
u32 flags;
int ret;
/*
* Get flags and then set/reset bit at bit_pos according to
* the input params.
*/
ret = cdx_mcdi_ctrl_flag_get(cdx, bus_num, dev_num, &flags);
if (ret)
return ret;
flags = flags & (u32)(~(BIT(bit_pos)));
if (enable)
flags |= (1 << bit_pos);
MCDI_SET_DWORD(inbuf, CDX_DEVICE_CONTROL_SET_IN_BUS, bus_num);
MCDI_SET_DWORD(inbuf, CDX_DEVICE_CONTROL_SET_IN_DEVICE, dev_num);
MCDI_SET_DWORD(inbuf, CDX_DEVICE_CONTROL_SET_IN_FLAGS, flags);
ret = cdx_mcdi_rpc(cdx, MC_CMD_CDX_DEVICE_CONTROL_SET, inbuf,
sizeof(inbuf), NULL, 0, NULL);
return ret;
}
int cdx_mcdi_bus_master_enable(struct cdx_mcdi *cdx, u8 bus_num,
u8 dev_num, bool enable)
{
return cdx_mcdi_ctrl_flag_set(cdx, bus_num, dev_num, enable,
MC_CMD_CDX_DEVICE_CONTROL_SET_IN_BUS_MASTER_ENABLE_LBN);
}
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