ipmi_kcs_ops_premem.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <arch/io.h>
#include <console/console.h>
#include <device/pnp.h>
#include <delay.h>
#include <timer.h>
 
#include "ipmi_kcs.h"
#include "chip.h"
 
static int ipmi_get_bmc_self_test_result(const struct device *dev,
        struct ipmi_selftest_rsp *rsp)
{
        int ret;
 
        ret = ipmi_kcs_message(dev->path.pnp.port, IPMI_NETFN_APPLICATION, 0,
                                 IPMI_BMC_GET_SELFTEST_RESULTS, NULL, 0, (u8 *)rsp,
                                 sizeof(*rsp));
 
        if (ret < sizeof(struct ipmi_rsp) || rsp->resp.completion_code) {
                printk(BIOS_ERR, "IPMI: %s command failed (ret=%d resp=0x%x)\n",
                       __func__, ret, rsp->resp.completion_code);
                return 1;
        }
        if (ret != sizeof(*rsp)) {
                printk(BIOS_ERR, "IPMI: %s response truncated\n", __func__);
                return 1;
        }
 
        return 0;
}
 
enum cb_err ipmi_kcs_premem_init(const u16 port, const u16 device)
{
        const struct drivers_ipmi_config *conf = NULL;
        struct ipmi_selftest_rsp selftestrsp = {0};
        uint8_t retry_count;
        const struct device *dev;
 
        /* Find IPMI PNP device from devicetree in romstage */
        dev = dev_find_slot_pnp(port, device);
 
        if (!dev) {
                printk(BIOS_ERR, "IPMI: Cannot find PNP device port: %x, device %x\n",
                        port, device);
                return CB_ERR;
        }
        if (!dev->enabled) {
                printk(BIOS_ERR, "IPMI: device is not enabled\n");
                return CB_ERR;
        }
        printk(BIOS_DEBUG, "IPMI: romstage PNP KCS 0x%x\n", dev->path.pnp.port);
        if (dev->chip_info)
                conf = dev->chip_info;
 
        if (conf && conf->wait_for_bmc && conf->bmc_boot_timeout) {
                struct stopwatch sw;
                stopwatch_init_msecs_expire(&sw, conf->bmc_boot_timeout * 1000);
                printk(BIOS_DEBUG, "IPMI: Waiting for BMC...\n");
 
                while (!stopwatch_expired(&sw)) {
                        if (inb(dev->path.pnp.port) != 0xff)
                                break;
                        mdelay(100);
                }
                if (stopwatch_expired(&sw)) {
                        printk(BIOS_INFO, "IPMI: Waiting for BMC timed out\n");
                        return CB_ERR;
                }
        }
 
        printk(BIOS_INFO, "Get BMC self test result...");
        if (conf && conf->bmc_boot_timeout) {
                for (retry_count = 0; retry_count < conf->bmc_boot_timeout; retry_count++) {
                        if (!ipmi_get_bmc_self_test_result(dev, &selftestrsp))
                                break;
 
                        mdelay(1000);
                }
        } else {
                /* At least run once */
                ipmi_get_bmc_self_test_result(dev, &selftestrsp);
        }
 
        int ret = CB_ERR;
        switch (selftestrsp.result) {
        case IPMI_APP_SELFTEST_NO_ERROR: /* 0x55 */
                printk(BIOS_DEBUG, "No Error\n");
                ret = CB_SUCCESS;
                break;
        case IPMI_APP_SELFTEST_NOT_IMPLEMENTED: /* 0x56 */
                printk(BIOS_DEBUG, "Function Not Implemented\n");
                ret = CB_SUCCESS;
                break;
        case IPMI_APP_SELFTEST_ERROR: /* 0x57 */
                printk(BIOS_ERR, "Corrupted or inaccessible data or device\n");
                break;
        case IPMI_APP_SELFTEST_FATAL_HW_ERROR: /* 0x58 */
                printk(BIOS_ERR, "Fatal Hardware Error\n");
                break;
        case IPMI_APP_SELFTEST_RESERVED: /* 0xFF */
                printk(BIOS_DEBUG, "Reserved\n");
                ret = CB_SUCCESS;
                break;
 
        default: /* Other Device Specific Hardware Error */
                printk(BIOS_ERR, "Device Specific Error 0x%x 0x%x\n", selftestrsp.result,
                        selftestrsp.param);
                break;
        }
        return ret;
}