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path: root/drivers/cdx/controller/mcdi_functions.c
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Diffstat (limited to 'drivers/cdx/controller/mcdi_functions.c')
-rw-r--r--drivers/cdx/controller/mcdi_functions.c139
1 files changed, 139 insertions, 0 deletions
diff --git a/drivers/cdx/controller/mcdi_functions.c b/drivers/cdx/controller/mcdi_functions.c
new file mode 100644
index 0000000000..0158f26533
--- /dev/null
+++ b/drivers/cdx/controller/mcdi_functions.c
@@ -0,0 +1,139 @@
+// 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);
+
+ return 0;
+}
+
+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;
+}