babee72ff6
As of now only one mailbox agent is supported by mailbox driver.
On zynqmp platform there are about 7 mailbox agents which can communicate
over same IPI channel to U-Boot. This patch series introduces new
"zynqmp_ipi_dest" driver which adds one to multi-channel mailbox
support.
Following format in device-tree is expected as per latest bindings:
zynqmp-ipi {
compatible = "xlnx,zynqmp-ipi-mailbox";
mbox_1: mailbox@1 {
/* New compatible for child node */
compatible = "xlnx,zynqmp-ipi-dest-mailbox";
...
};
...
mbox_n: mailbox@n {
compatible = "xlnx,zynqmp-ipi-dest-mailbox";
...
}
};
Then mailbox client uses child mailbox node as following:
ipi-dest-1 {
...
mboxes = <mbox_1 0>, <mbox_1 1>;
mbox-names = "tx", "rx";
...
};
New "zynqmp_ipi_dest" driver is for devices with
"xlnx,zynqmp-ipi-dest-mailbox" compatible string. This driver will take care
of mailbox send recv ops and it replaces previous "zynqmp_ipi" driver.
Now "zynqmp_ipi" driver simply binds each child device with "zynqmp_ipi_dest"
driver.
However, its important to maintain backward comaptibility with previous
bindings where child node does not have compatible string. In such case, new
driver isn't probed by U-Boot during boot and system fails to boot. To
resolve this issue firmware-zynqmp.c driver probes all the IPI parent node
driver which binds each child node device with "zynqmp_ipi_dest" driver.
This makes sure corresponding child driver will be
probed when requested using mbox_get_by_name or mbox_get_by_idx
framework calls.
This way multiple mailbox agents are supported in device-tree without breaking
previous binding support.
Signed-off-by: Tanmay Shah <tanmay.shah@amd.com>
Link: https://lore.kernel.org/r/20231204215620.63334-4-tanmay.shah@amd.com
Signed-off-by: Michal Simek <michal.simek@amd.com>
443 lines
11 KiB
C
443 lines
11 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Xilinx Zynq MPSoC Firmware driver
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*
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* Copyright (C) 2018-2019 Xilinx, Inc.
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*/
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#include <common.h>
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#include <cpu_func.h>
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#include <dm.h>
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#include <dm/device_compat.h>
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#include <dm/lists.h>
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#include <log.h>
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#include <zynqmp_firmware.h>
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#include <asm/cache.h>
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#include <asm/ptrace.h>
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#if defined(CONFIG_ZYNQMP_IPI)
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#include <mailbox.h>
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#include <asm/arch/sys_proto.h>
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#define PMUFW_PAYLOAD_ARG_CNT 8
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#define XST_PM_NO_ACCESS 2002L
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#define XST_PM_ALREADY_CONFIGURED 2009L
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static struct zynqmp_power {
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struct mbox_chan tx_chan;
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struct mbox_chan rx_chan;
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} zynqmp_power __section(".data");
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#define NODE_ID_LOCATION 5
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static unsigned int xpm_configobject[] = {
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/**********************************************************************/
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/* HEADER */
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2, /* Number of remaining words in the header */
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1, /* Number of sections included in config object */
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PM_CONFIG_OBJECT_TYPE_OVERLAY, /* Type of Config object as overlay */
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/**********************************************************************/
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/* SLAVE SECTION */
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PM_CONFIG_SLAVE_SECTION_ID, /* Section ID */
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1, /* Number of slaves */
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0, /* Node ID which will be changed below */
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PM_SLAVE_FLAG_IS_SHAREABLE,
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PM_CONFIG_IPI_PSU_CORTEXA53_0_MASK |
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PM_CONFIG_IPI_PSU_CORTEXR5_0_MASK |
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PM_CONFIG_IPI_PSU_CORTEXR5_1_MASK, /* IPI Mask */
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};
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static unsigned int xpm_configobject_close[] = {
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/**********************************************************************/
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/* HEADER */
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2, /* Number of remaining words in the header */
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1, /* Number of sections included in config object */
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PM_CONFIG_OBJECT_TYPE_OVERLAY, /* Type of Config object as overlay */
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/**********************************************************************/
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/* SET CONFIG SECTION */
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PM_CONFIG_SET_CONFIG_SECTION_ID,
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0U, /* Loading permission to Overlay config object */
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};
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int zynqmp_pmufw_config_close(void)
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{
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return zynqmp_pmufw_load_config_object(xpm_configobject_close,
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sizeof(xpm_configobject_close));
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}
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int zynqmp_pmufw_node(u32 id)
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{
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static bool check = true;
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static bool permission = true;
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if (check) {
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check = false;
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if (zynqmp_pmufw_node(NODE_OCM_BANK_0) == -EACCES) {
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printf("PMUFW: No permission to change config object\n");
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permission = false;
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}
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}
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if (!permission)
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return 0;
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/* Record power domain id */
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xpm_configobject[NODE_ID_LOCATION] = id;
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return zynqmp_pmufw_load_config_object(xpm_configobject,
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sizeof(xpm_configobject));
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}
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static int do_pm_probe(void)
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{
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struct udevice *dev;
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int ret;
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ret = uclass_get_device_by_driver(UCLASS_FIRMWARE,
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DM_DRIVER_GET(zynqmp_power),
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&dev);
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if (ret)
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debug("%s: Probing device failed: %d\n", __func__, ret);
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return ret;
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}
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static int ipi_req(const u32 *req, size_t req_len, u32 *res, size_t res_maxlen)
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{
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struct zynqmp_ipi_msg msg;
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int ret;
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u32 buffer[PAYLOAD_ARG_CNT];
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if (!res)
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res = buffer;
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if (req_len > PMUFW_PAYLOAD_ARG_CNT ||
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res_maxlen > PMUFW_PAYLOAD_ARG_CNT)
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return -EINVAL;
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if (!(zynqmp_power.tx_chan.dev) || !(zynqmp_power.rx_chan.dev)) {
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ret = do_pm_probe();
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if (ret)
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return ret;
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}
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debug("%s, Sending IPI message with ID: 0x%0x\n", __func__, req[0]);
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msg.buf = (u32 *)req;
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msg.len = req_len;
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ret = mbox_send(&zynqmp_power.tx_chan, &msg);
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if (ret) {
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debug("%s: Sending message failed\n", __func__);
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return ret;
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}
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msg.buf = res;
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msg.len = res_maxlen;
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ret = mbox_recv(&zynqmp_power.rx_chan, &msg, 100);
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if (ret)
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debug("%s: Receiving message failed\n", __func__);
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return ret;
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}
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unsigned int zynqmp_firmware_version(void)
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{
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int ret;
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u32 ret_payload[PAYLOAD_ARG_CNT];
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static u32 pm_api_version = ZYNQMP_PM_VERSION_INVALID;
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/*
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* Get PMU version only once and later
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* just return stored values instead of
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* asking PMUFW again.
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**/
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if (pm_api_version == ZYNQMP_PM_VERSION_INVALID) {
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ret = xilinx_pm_request(PM_GET_API_VERSION, 0, 0, 0, 0,
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ret_payload);
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if (ret)
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panic("PMUFW is not found - Please load it!\n");
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pm_api_version = ret_payload[1];
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if (pm_api_version < ZYNQMP_PM_VERSION)
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panic("PMUFW version error. Expected: v%d.%d\n",
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ZYNQMP_PM_VERSION_MAJOR, ZYNQMP_PM_VERSION_MINOR);
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}
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return pm_api_version;
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};
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int zynqmp_pm_set_gem_config(u32 node, enum pm_gem_config_type config, u32 value)
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{
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int ret;
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ret = xilinx_pm_request(PM_IOCTL, node, IOCTL_SET_GEM_CONFIG,
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config, value, NULL);
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if (ret)
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printf("%s: node %d: set_gem_config %d failed\n",
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__func__, node, config);
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return ret;
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}
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int zynqmp_pm_set_sd_config(u32 node, enum pm_sd_config_type config, u32 value)
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{
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int ret;
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ret = xilinx_pm_request(PM_IOCTL, node, IOCTL_SET_SD_CONFIG,
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config, value, NULL);
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if (ret)
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printf("%s: node %d: set_sd_config %d failed\n",
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__func__, node, config);
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return ret;
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}
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int zynqmp_pm_feature(const u32 api_id)
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{
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int ret;
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u32 ret_payload[PAYLOAD_ARG_CNT];
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/* Check feature check API version */
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ret = xilinx_pm_request(PM_FEATURE_CHECK, api_id, 0, 0, 0,
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ret_payload);
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if (ret)
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return ret;
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/* Return feature check version */
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return ret_payload[1] & FIRMWARE_VERSION_MASK;
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}
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int zynqmp_pm_is_function_supported(const u32 api_id, const u32 id)
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{
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int ret;
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u32 *bit_mask;
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u32 ret_payload[PAYLOAD_ARG_CNT];
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/* Input arguments validation */
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if (id >= 64 || (api_id != PM_IOCTL && api_id != PM_QUERY_DATA))
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return -EINVAL;
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/* Check feature check API version */
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ret = xilinx_pm_request(PM_FEATURE_CHECK, PM_FEATURE_CHECK, 0, 0, 0,
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ret_payload);
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if (ret)
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return ret;
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/* Check if feature check version 2 is supported or not */
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if ((ret_payload[1] & FIRMWARE_VERSION_MASK) == PM_API_VERSION_2) {
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/*
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* Call feature check for IOCTL/QUERY API to get IOCTL ID or
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* QUERY ID feature status.
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*/
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ret = xilinx_pm_request(PM_FEATURE_CHECK, api_id, 0, 0, 0,
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ret_payload);
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if (ret)
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return ret;
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bit_mask = &ret_payload[2];
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if ((bit_mask[(id / 32)] & BIT((id % 32))) == 0)
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return -EOPNOTSUPP;
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} else {
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return -ENODATA;
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}
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return 0;
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}
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/**
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* Send a configuration object to the PMU firmware.
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*
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* @cfg_obj: Pointer to the configuration object
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* @size: Size of @cfg_obj in bytes
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* Return: 0 on success otherwise negative errno.
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*/
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int zynqmp_pmufw_load_config_object(const void *cfg_obj, size_t size)
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{
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int err;
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u32 ret_payload[PAYLOAD_ARG_CNT];
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if (IS_ENABLED(CONFIG_SPL_BUILD))
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printf("Loading new PMUFW cfg obj (%ld bytes)\n", size);
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flush_dcache_range((ulong)cfg_obj, (ulong)(cfg_obj + size));
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err = xilinx_pm_request(PM_SET_CONFIGURATION, (u32)(u64)cfg_obj, 0, 0,
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0, ret_payload);
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if (err == XST_PM_NO_ACCESS) {
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return -EACCES;
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}
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if (err == XST_PM_ALREADY_CONFIGURED) {
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debug("PMUFW Node is already configured\n");
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return -ENODEV;
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}
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if (err)
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printf("Cannot load PMUFW configuration object (%d)\n", err);
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if (ret_payload[0])
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printf("PMUFW returned 0x%08x status!\n", ret_payload[0]);
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if ((err || ret_payload[0]) && IS_ENABLED(CONFIG_SPL_BUILD))
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panic("PMUFW config object loading failed in EL3\n");
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return 0;
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}
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static int zynqmp_power_probe(struct udevice *dev)
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{
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struct udevice *ipi_dev;
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ofnode ipi_node;
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int ret;
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debug("%s, (dev=%p)\n", __func__, dev);
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/*
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* Probe all IPI parent node driver. It is important to have IPI
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* devices available when requested by mbox_get_by* API.
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* If IPI device isn't available, then mailbox request fails and
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* that causes system boot failure.
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* To avoid this make sure all IPI parent drivers are probed here,
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* and IPI parent driver binds each child node to mailbox driver.
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* This way mbox_get_by_* API will have correct mailbox device
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* driver probed.
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*/
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ofnode_for_each_compatible_node(ipi_node, "xlnx,zynqmp-ipi-mailbox") {
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ret = uclass_get_device_by_ofnode(UCLASS_NOP, ipi_node, &ipi_dev);
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if (ret) {
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dev_err(dev, "failed to get IPI device from node %s\n",
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ofnode_get_name(ipi_node));
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return ret;
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}
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}
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ret = mbox_get_by_name(dev, "tx", &zynqmp_power.tx_chan);
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if (ret) {
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debug("%s: Cannot find tx mailbox\n", __func__);
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return ret;
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}
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ret = mbox_get_by_name(dev, "rx", &zynqmp_power.rx_chan);
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if (ret) {
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debug("%s: Cannot find rx mailbox\n", __func__);
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return ret;
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}
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ret = zynqmp_firmware_version();
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printf("PMUFW:\tv%d.%d\n",
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ret >> ZYNQMP_PM_VERSION_MAJOR_SHIFT,
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ret & ZYNQMP_PM_VERSION_MINOR_MASK);
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return 0;
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};
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static const struct udevice_id zynqmp_power_ids[] = {
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{ .compatible = "xlnx,zynqmp-power" },
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{ }
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};
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U_BOOT_DRIVER(zynqmp_power) = {
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.name = "zynqmp_power",
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.id = UCLASS_FIRMWARE,
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.of_match = zynqmp_power_ids,
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.probe = zynqmp_power_probe,
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};
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#endif
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int __maybe_unused xilinx_pm_request(u32 api_id, u32 arg0, u32 arg1, u32 arg2,
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u32 arg3, u32 *ret_payload)
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{
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debug("%s at EL%d, API ID: 0x%0x, 0x%0x, 0x%0x, 0x%0x, 0x%0x\n",
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__func__, current_el(), api_id, arg0, arg1, arg2, arg3);
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if (IS_ENABLED(CONFIG_SPL_BUILD) || current_el() == 3) {
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#if defined(CONFIG_ZYNQMP_IPI)
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/*
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* Use fixed payload and arg size as the EL2 call. The firmware
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* is capable to handle PMUFW_PAYLOAD_ARG_CNT bytes but the
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* firmware API is limited by the SMC call size
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*/
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u32 regs[] = {api_id, arg0, arg1, arg2, arg3};
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int ret;
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if (api_id == PM_FPGA_LOAD) {
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/* Swap addr_hi/low because of incompatibility */
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u32 temp = regs[1];
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regs[1] = regs[2];
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regs[2] = temp;
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}
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ret = ipi_req(regs, PAYLOAD_ARG_CNT, ret_payload,
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PAYLOAD_ARG_CNT);
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if (ret)
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return ret;
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#else
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return -EPERM;
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#endif
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} else {
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/*
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* Added SIP service call Function Identifier
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* Make sure to stay in x0 register
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*/
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struct pt_regs regs;
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regs.regs[0] = PM_SIP_SVC | api_id;
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regs.regs[1] = ((u64)arg1 << 32) | arg0;
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regs.regs[2] = ((u64)arg3 << 32) | arg2;
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smc_call(®s);
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if (ret_payload) {
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ret_payload[0] = (u32)regs.regs[0];
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ret_payload[1] = upper_32_bits(regs.regs[0]);
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ret_payload[2] = (u32)regs.regs[1];
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ret_payload[3] = upper_32_bits(regs.regs[1]);
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ret_payload[4] = (u32)regs.regs[2];
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}
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}
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return (ret_payload) ? ret_payload[0] : 0;
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}
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static const struct udevice_id zynqmp_firmware_ids[] = {
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{ .compatible = "xlnx,zynqmp-firmware" },
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{ .compatible = "xlnx,versal-firmware"},
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{ .compatible = "xlnx,versal-net-firmware"},
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{ }
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};
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static int zynqmp_firmware_bind(struct udevice *dev)
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{
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int ret;
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struct udevice *child;
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if ((IS_ENABLED(CONFIG_SPL_BUILD) &&
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IS_ENABLED(CONFIG_SPL_POWER_DOMAIN) &&
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IS_ENABLED(CONFIG_ZYNQMP_POWER_DOMAIN)) ||
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(!IS_ENABLED(CONFIG_SPL_BUILD) &&
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IS_ENABLED(CONFIG_ZYNQMP_POWER_DOMAIN))) {
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ret = device_bind_driver_to_node(dev, "zynqmp_power_domain",
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"zynqmp_power_domain",
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dev_ofnode(dev), &child);
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if (ret) {
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printf("zynqmp power domain driver is not bound: %d\n", ret);
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return ret;
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}
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}
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return 0;
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}
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U_BOOT_DRIVER(zynqmp_firmware) = {
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.id = UCLASS_FIRMWARE,
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.name = "zynqmp_firmware",
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.of_match = zynqmp_firmware_ids,
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.bind = zynqmp_firmware_bind,
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};
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