root/drivers/scsi/qla4xxx/ql4_bsg.c
// SPDX-License-Identifier: GPL-2.0-only
/*
 * QLogic iSCSI HBA Driver
 * Copyright (c) 2011-2013 QLogic Corporation
 */

#include "ql4_def.h"
#include "ql4_glbl.h"
#include "ql4_bsg.h"

static int
qla4xxx_read_flash(struct bsg_job *bsg_job)
{
        struct Scsi_Host *host = iscsi_job_to_shost(bsg_job);
        struct scsi_qla_host *ha = to_qla_host(host);
        struct iscsi_bsg_reply *bsg_reply = bsg_job->reply;
        struct iscsi_bsg_request *bsg_req = bsg_job->request;
        uint32_t offset = 0;
        uint32_t length = 0;
        dma_addr_t flash_dma;
        uint8_t *flash = NULL;
        int rval = -EINVAL;

        bsg_reply->reply_payload_rcv_len = 0;

        if (unlikely(pci_channel_offline(ha->pdev)))
                goto leave;

        if (ql4xxx_reset_active(ha)) {
                ql4_printk(KERN_ERR, ha, "%s: reset active\n", __func__);
                rval = -EBUSY;
                goto leave;
        }

        if (ha->flash_state != QLFLASH_WAITING) {
                ql4_printk(KERN_ERR, ha, "%s: another flash operation "
                           "active\n", __func__);
                rval = -EBUSY;
                goto leave;
        }

        ha->flash_state = QLFLASH_READING;
        offset = bsg_req->rqst_data.h_vendor.vendor_cmd[1];
        length = bsg_job->reply_payload.payload_len;

        flash = dma_alloc_coherent(&ha->pdev->dev, length, &flash_dma,
                                   GFP_KERNEL);
        if (!flash) {
                ql4_printk(KERN_ERR, ha, "%s: dma alloc failed for flash "
                           "data\n", __func__);
                rval = -ENOMEM;
                goto leave;
        }

        rval = qla4xxx_get_flash(ha, flash_dma, offset, length);
        if (rval) {
                ql4_printk(KERN_ERR, ha, "%s: get flash failed\n", __func__);
                bsg_reply->result = DID_ERROR << 16;
                rval = -EIO;
        } else {
                bsg_reply->reply_payload_rcv_len =
                        sg_copy_from_buffer(bsg_job->reply_payload.sg_list,
                                            bsg_job->reply_payload.sg_cnt,
                                            flash, length);
                bsg_reply->result = DID_OK << 16;
        }

        bsg_job_done(bsg_job, bsg_reply->result,
                     bsg_reply->reply_payload_rcv_len);
        dma_free_coherent(&ha->pdev->dev, length, flash, flash_dma);
leave:
        ha->flash_state = QLFLASH_WAITING;
        return rval;
}

static int
qla4xxx_update_flash(struct bsg_job *bsg_job)
{
        struct Scsi_Host *host = iscsi_job_to_shost(bsg_job);
        struct scsi_qla_host *ha = to_qla_host(host);
        struct iscsi_bsg_reply *bsg_reply = bsg_job->reply;
        struct iscsi_bsg_request *bsg_req = bsg_job->request;
        uint32_t length = 0;
        uint32_t offset = 0;
        uint32_t options = 0;
        dma_addr_t flash_dma;
        uint8_t *flash = NULL;
        int rval = -EINVAL;

        bsg_reply->reply_payload_rcv_len = 0;

        if (unlikely(pci_channel_offline(ha->pdev)))
                goto leave;

        if (ql4xxx_reset_active(ha)) {
                ql4_printk(KERN_ERR, ha, "%s: reset active\n", __func__);
                rval = -EBUSY;
                goto leave;
        }

        if (ha->flash_state != QLFLASH_WAITING) {
                ql4_printk(KERN_ERR, ha, "%s: another flash operation "
                           "active\n", __func__);
                rval = -EBUSY;
                goto leave;
        }

        ha->flash_state = QLFLASH_WRITING;
        length = bsg_job->request_payload.payload_len;
        offset = bsg_req->rqst_data.h_vendor.vendor_cmd[1];
        options = bsg_req->rqst_data.h_vendor.vendor_cmd[2];

        flash = dma_alloc_coherent(&ha->pdev->dev, length, &flash_dma,
                                   GFP_KERNEL);
        if (!flash) {
                ql4_printk(KERN_ERR, ha, "%s: dma alloc failed for flash "
                           "data\n", __func__);
                rval = -ENOMEM;
                goto leave;
        }

        sg_copy_to_buffer(bsg_job->request_payload.sg_list,
                          bsg_job->request_payload.sg_cnt, flash, length);

        rval = qla4xxx_set_flash(ha, flash_dma, offset, length, options);
        if (rval) {
                ql4_printk(KERN_ERR, ha, "%s: set flash failed\n", __func__);
                bsg_reply->result = DID_ERROR << 16;
                rval = -EIO;
        } else
                bsg_reply->result = DID_OK << 16;

        bsg_job_done(bsg_job, bsg_reply->result,
                     bsg_reply->reply_payload_rcv_len);
        dma_free_coherent(&ha->pdev->dev, length, flash, flash_dma);
leave:
        ha->flash_state = QLFLASH_WAITING;
        return rval;
}

static int
qla4xxx_get_acb_state(struct bsg_job *bsg_job)
{
        struct Scsi_Host *host = iscsi_job_to_shost(bsg_job);
        struct scsi_qla_host *ha = to_qla_host(host);
        struct iscsi_bsg_request *bsg_req = bsg_job->request;
        struct iscsi_bsg_reply *bsg_reply = bsg_job->reply;
        uint32_t status[MBOX_REG_COUNT];
        uint32_t acb_idx;
        uint32_t ip_idx;
        int rval = -EINVAL;

        bsg_reply->reply_payload_rcv_len = 0;

        if (unlikely(pci_channel_offline(ha->pdev)))
                goto leave;

        /* Only 4022 and above adapters are supported */
        if (is_qla4010(ha))
                goto leave;

        if (ql4xxx_reset_active(ha)) {
                ql4_printk(KERN_ERR, ha, "%s: reset active\n", __func__);
                rval = -EBUSY;
                goto leave;
        }

        if (bsg_job->reply_payload.payload_len < sizeof(status)) {
                ql4_printk(KERN_ERR, ha, "%s: invalid payload len %d\n",
                           __func__, bsg_job->reply_payload.payload_len);
                rval = -EINVAL;
                goto leave;
        }

        acb_idx = bsg_req->rqst_data.h_vendor.vendor_cmd[1];
        ip_idx = bsg_req->rqst_data.h_vendor.vendor_cmd[2];

        rval = qla4xxx_get_ip_state(ha, acb_idx, ip_idx, status);
        if (rval) {
                ql4_printk(KERN_ERR, ha, "%s: get ip state failed\n",
                           __func__);
                bsg_reply->result = DID_ERROR << 16;
                rval = -EIO;
        } else {
                bsg_reply->reply_payload_rcv_len =
                        sg_copy_from_buffer(bsg_job->reply_payload.sg_list,
                                            bsg_job->reply_payload.sg_cnt,
                                            status, sizeof(status));
                bsg_reply->result = DID_OK << 16;
        }

        bsg_job_done(bsg_job, bsg_reply->result,
                     bsg_reply->reply_payload_rcv_len);
leave:
        return rval;
}

static int
qla4xxx_read_nvram(struct bsg_job *bsg_job)
{
        struct Scsi_Host *host = iscsi_job_to_shost(bsg_job);
        struct scsi_qla_host *ha = to_qla_host(host);
        struct iscsi_bsg_request *bsg_req = bsg_job->request;
        struct iscsi_bsg_reply *bsg_reply = bsg_job->reply;
        uint32_t offset = 0;
        uint32_t len = 0;
        uint32_t total_len = 0;
        dma_addr_t nvram_dma;
        uint8_t *nvram = NULL;
        int rval = -EINVAL;

        bsg_reply->reply_payload_rcv_len = 0;

        if (unlikely(pci_channel_offline(ha->pdev)))
                goto leave;

        /* Only 40xx adapters are supported */
        if (!(is_qla4010(ha) || is_qla4022(ha) || is_qla4032(ha)))
                goto leave;

        if (ql4xxx_reset_active(ha)) {
                ql4_printk(KERN_ERR, ha, "%s: reset active\n", __func__);
                rval = -EBUSY;
                goto leave;
        }

        offset = bsg_req->rqst_data.h_vendor.vendor_cmd[1];
        len = bsg_job->reply_payload.payload_len;
        total_len = offset + len;

        /* total len should not be greater than max NVRAM size */
        if ((is_qla4010(ha) && total_len > QL4010_NVRAM_SIZE) ||
            ((is_qla4022(ha) || is_qla4032(ha)) &&
             total_len > QL40X2_NVRAM_SIZE)) {
                ql4_printk(KERN_ERR, ha, "%s: offset+len greater than max"
                           " nvram size, offset=%d len=%d\n",
                           __func__, offset, len);
                goto leave;
        }

        nvram = dma_alloc_coherent(&ha->pdev->dev, len, &nvram_dma,
                                   GFP_KERNEL);
        if (!nvram) {
                ql4_printk(KERN_ERR, ha, "%s: dma alloc failed for nvram "
                           "data\n", __func__);
                rval = -ENOMEM;
                goto leave;
        }

        rval = qla4xxx_get_nvram(ha, nvram_dma, offset, len);
        if (rval) {
                ql4_printk(KERN_ERR, ha, "%s: get nvram failed\n", __func__);
                bsg_reply->result = DID_ERROR << 16;
                rval = -EIO;
        } else {
                bsg_reply->reply_payload_rcv_len =
                        sg_copy_from_buffer(bsg_job->reply_payload.sg_list,
                                            bsg_job->reply_payload.sg_cnt,
                                            nvram, len);
                bsg_reply->result = DID_OK << 16;
        }

        bsg_job_done(bsg_job, bsg_reply->result,
                     bsg_reply->reply_payload_rcv_len);
        dma_free_coherent(&ha->pdev->dev, len, nvram, nvram_dma);
leave:
        return rval;
}

static int
qla4xxx_update_nvram(struct bsg_job *bsg_job)
{
        struct Scsi_Host *host = iscsi_job_to_shost(bsg_job);
        struct scsi_qla_host *ha = to_qla_host(host);
        struct iscsi_bsg_request *bsg_req = bsg_job->request;
        struct iscsi_bsg_reply *bsg_reply = bsg_job->reply;
        uint32_t offset = 0;
        uint32_t len = 0;
        uint32_t total_len = 0;
        dma_addr_t nvram_dma;
        uint8_t *nvram = NULL;
        int rval = -EINVAL;

        bsg_reply->reply_payload_rcv_len = 0;

        if (unlikely(pci_channel_offline(ha->pdev)))
                goto leave;

        if (!(is_qla4010(ha) || is_qla4022(ha) || is_qla4032(ha)))
                goto leave;

        if (ql4xxx_reset_active(ha)) {
                ql4_printk(KERN_ERR, ha, "%s: reset active\n", __func__);
                rval = -EBUSY;
                goto leave;
        }

        offset = bsg_req->rqst_data.h_vendor.vendor_cmd[1];
        len = bsg_job->request_payload.payload_len;
        total_len = offset + len;

        /* total len should not be greater than max NVRAM size */
        if ((is_qla4010(ha) && total_len > QL4010_NVRAM_SIZE) ||
            ((is_qla4022(ha) || is_qla4032(ha)) &&
             total_len > QL40X2_NVRAM_SIZE)) {
                ql4_printk(KERN_ERR, ha, "%s: offset+len greater than max"
                           " nvram size, offset=%d len=%d\n",
                           __func__, offset, len);
                goto leave;
        }

        nvram = dma_alloc_coherent(&ha->pdev->dev, len, &nvram_dma,
                                   GFP_KERNEL);
        if (!nvram) {
                ql4_printk(KERN_ERR, ha, "%s: dma alloc failed for flash "
                           "data\n", __func__);
                rval = -ENOMEM;
                goto leave;
        }

        sg_copy_to_buffer(bsg_job->request_payload.sg_list,
                          bsg_job->request_payload.sg_cnt, nvram, len);

        rval = qla4xxx_set_nvram(ha, nvram_dma, offset, len);
        if (rval) {
                ql4_printk(KERN_ERR, ha, "%s: set nvram failed\n", __func__);
                bsg_reply->result = DID_ERROR << 16;
                rval = -EIO;
        } else
                bsg_reply->result = DID_OK << 16;

        bsg_job_done(bsg_job, bsg_reply->result,
                     bsg_reply->reply_payload_rcv_len);
        dma_free_coherent(&ha->pdev->dev, len, nvram, nvram_dma);
leave:
        return rval;
}

static int
qla4xxx_restore_defaults(struct bsg_job *bsg_job)
{
        struct Scsi_Host *host = iscsi_job_to_shost(bsg_job);
        struct scsi_qla_host *ha = to_qla_host(host);
        struct iscsi_bsg_request *bsg_req = bsg_job->request;
        struct iscsi_bsg_reply *bsg_reply = bsg_job->reply;
        uint32_t region = 0;
        uint32_t field0 = 0;
        uint32_t field1 = 0;
        int rval = -EINVAL;

        bsg_reply->reply_payload_rcv_len = 0;

        if (unlikely(pci_channel_offline(ha->pdev)))
                goto leave;

        if (is_qla4010(ha))
                goto leave;

        if (ql4xxx_reset_active(ha)) {
                ql4_printk(KERN_ERR, ha, "%s: reset active\n", __func__);
                rval = -EBUSY;
                goto leave;
        }

        region = bsg_req->rqst_data.h_vendor.vendor_cmd[1];
        field0 = bsg_req->rqst_data.h_vendor.vendor_cmd[2];
        field1 = bsg_req->rqst_data.h_vendor.vendor_cmd[3];

        rval = qla4xxx_restore_factory_defaults(ha, region, field0, field1);
        if (rval) {
                ql4_printk(KERN_ERR, ha, "%s: set nvram failed\n", __func__);
                bsg_reply->result = DID_ERROR << 16;
                rval = -EIO;
        } else
                bsg_reply->result = DID_OK << 16;

        bsg_job_done(bsg_job, bsg_reply->result,
                     bsg_reply->reply_payload_rcv_len);
leave:
        return rval;
}

static int
qla4xxx_bsg_get_acb(struct bsg_job *bsg_job)
{
        struct Scsi_Host *host = iscsi_job_to_shost(bsg_job);
        struct scsi_qla_host *ha = to_qla_host(host);
        struct iscsi_bsg_request *bsg_req = bsg_job->request;
        struct iscsi_bsg_reply *bsg_reply = bsg_job->reply;
        uint32_t acb_type = 0;
        uint32_t len = 0;
        dma_addr_t acb_dma;
        uint8_t *acb = NULL;
        int rval = -EINVAL;

        bsg_reply->reply_payload_rcv_len = 0;

        if (unlikely(pci_channel_offline(ha->pdev)))
                goto leave;

        /* Only 4022 and above adapters are supported */
        if (is_qla4010(ha))
                goto leave;

        if (ql4xxx_reset_active(ha)) {
                ql4_printk(KERN_ERR, ha, "%s: reset active\n", __func__);
                rval = -EBUSY;
                goto leave;
        }

        acb_type = bsg_req->rqst_data.h_vendor.vendor_cmd[1];
        len = bsg_job->reply_payload.payload_len;
        if (len < sizeof(struct addr_ctrl_blk)) {
                ql4_printk(KERN_ERR, ha, "%s: invalid acb len %d\n",
                           __func__, len);
                rval = -EINVAL;
                goto leave;
        }

        acb = dma_alloc_coherent(&ha->pdev->dev, len, &acb_dma, GFP_KERNEL);
        if (!acb) {
                ql4_printk(KERN_ERR, ha, "%s: dma alloc failed for acb "
                           "data\n", __func__);
                rval = -ENOMEM;
                goto leave;
        }

        rval = qla4xxx_get_acb(ha, acb_dma, acb_type, len);
        if (rval) {
                ql4_printk(KERN_ERR, ha, "%s: get acb failed\n", __func__);
                bsg_reply->result = DID_ERROR << 16;
                rval = -EIO;
        } else {
                bsg_reply->reply_payload_rcv_len =
                        sg_copy_from_buffer(bsg_job->reply_payload.sg_list,
                                            bsg_job->reply_payload.sg_cnt,
                                            acb, len);
                bsg_reply->result = DID_OK << 16;
        }

        bsg_job_done(bsg_job, bsg_reply->result,
                     bsg_reply->reply_payload_rcv_len);
        dma_free_coherent(&ha->pdev->dev, len, acb, acb_dma);
leave:
        return rval;
}

static void ql4xxx_execute_diag_cmd(struct bsg_job *bsg_job)
{
        struct Scsi_Host *host = iscsi_job_to_shost(bsg_job);
        struct scsi_qla_host *ha = to_qla_host(host);
        struct iscsi_bsg_request *bsg_req = bsg_job->request;
        struct iscsi_bsg_reply *bsg_reply = bsg_job->reply;
        uint8_t *rsp_ptr = NULL;
        uint32_t mbox_cmd[MBOX_REG_COUNT];
        uint32_t mbox_sts[MBOX_REG_COUNT];
        int status = QLA_ERROR;

        DEBUG2(ql4_printk(KERN_INFO, ha, "%s: in\n", __func__));

        if (test_bit(DPC_RESET_HA, &ha->dpc_flags)) {
                ql4_printk(KERN_INFO, ha, "%s: Adapter reset in progress. Invalid Request\n",
                           __func__);
                bsg_reply->result = DID_ERROR << 16;
                goto exit_diag_mem_test;
        }

        bsg_reply->reply_payload_rcv_len = 0;
        memcpy(mbox_cmd, &bsg_req->rqst_data.h_vendor.vendor_cmd[1],
               sizeof(uint32_t) * MBOX_REG_COUNT);

        DEBUG2(ql4_printk(KERN_INFO, ha,
                          "%s: mbox_cmd: %08X %08X %08X %08X %08X %08X %08X %08X\n",
                          __func__, mbox_cmd[0], mbox_cmd[1], mbox_cmd[2],
                          mbox_cmd[3], mbox_cmd[4], mbox_cmd[5], mbox_cmd[6],
                          mbox_cmd[7]));

        status = qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, 8, &mbox_cmd[0],
                                         &mbox_sts[0]);

        DEBUG2(ql4_printk(KERN_INFO, ha,
                          "%s: mbox_sts: %08X %08X %08X %08X %08X %08X %08X %08X\n",
                          __func__, mbox_sts[0], mbox_sts[1], mbox_sts[2],
                          mbox_sts[3], mbox_sts[4], mbox_sts[5], mbox_sts[6],
                          mbox_sts[7]));

        if (status == QLA_SUCCESS)
                bsg_reply->result = DID_OK << 16;
        else
                bsg_reply->result = DID_ERROR << 16;

        /* Send mbox_sts to application */
        bsg_job->reply_len = sizeof(struct iscsi_bsg_reply) + sizeof(mbox_sts);
        rsp_ptr = ((uint8_t *)bsg_reply) + sizeof(struct iscsi_bsg_reply);
        memcpy(rsp_ptr, mbox_sts, sizeof(mbox_sts));

exit_diag_mem_test:
        DEBUG2(ql4_printk(KERN_INFO, ha,
                          "%s: bsg_reply->result = x%x, status = %s\n",
                          __func__, bsg_reply->result, STATUS(status)));

        bsg_job_done(bsg_job, bsg_reply->result,
                     bsg_reply->reply_payload_rcv_len);
}

static int qla4_83xx_wait_for_loopback_config_comp(struct scsi_qla_host *ha,
                                                   int wait_for_link)
{
        int status = QLA_SUCCESS;

        if (!wait_for_completion_timeout(&ha->idc_comp, (IDC_COMP_TOV * HZ))) {
                ql4_printk(KERN_INFO, ha, "%s: IDC Complete notification not received, Waiting for another %d timeout",
                           __func__, ha->idc_extend_tmo);
                if (ha->idc_extend_tmo) {
                        if (!wait_for_completion_timeout(&ha->idc_comp,
                                                (ha->idc_extend_tmo * HZ))) {
                                ha->notify_idc_comp = 0;
                                ha->notify_link_up_comp = 0;
                                ql4_printk(KERN_WARNING, ha, "%s: Aborting: IDC Complete notification not received",
                                           __func__);
                                status = QLA_ERROR;
                                goto exit_wait;
                        } else {
                                DEBUG2(ql4_printk(KERN_INFO, ha,
                                                  "%s: IDC Complete notification received\n",
                                                  __func__));
                        }
                }
        } else {
                DEBUG2(ql4_printk(KERN_INFO, ha,
                                  "%s: IDC Complete notification received\n",
                                  __func__));
        }
        ha->notify_idc_comp = 0;

        if (wait_for_link) {
                if (!wait_for_completion_timeout(&ha->link_up_comp,
                                                 (IDC_COMP_TOV * HZ))) {
                        ha->notify_link_up_comp = 0;
                        ql4_printk(KERN_WARNING, ha, "%s: Aborting: LINK UP notification not received",
                                   __func__);
                        status = QLA_ERROR;
                        goto exit_wait;
                } else {
                        DEBUG2(ql4_printk(KERN_INFO, ha,
                                          "%s: LINK UP notification received\n",
                                          __func__));
                }
                ha->notify_link_up_comp = 0;
        }

exit_wait:
        return status;
}

static int qla4_83xx_pre_loopback_config(struct scsi_qla_host *ha,
                                         uint32_t *mbox_cmd)
{
        uint32_t config = 0;
        int status = QLA_SUCCESS;

        DEBUG2(ql4_printk(KERN_INFO, ha, "%s: in\n", __func__));

        status = qla4_83xx_get_port_config(ha, &config);
        if (status != QLA_SUCCESS)
                goto exit_pre_loopback_config;

        DEBUG2(ql4_printk(KERN_INFO, ha, "%s: Default port config=%08X\n",
                          __func__, config));

        if ((config & ENABLE_INTERNAL_LOOPBACK) ||
            (config & ENABLE_EXTERNAL_LOOPBACK)) {
                ql4_printk(KERN_INFO, ha, "%s: Loopback diagnostics already in progress. Invalid request\n",
                           __func__);
                goto exit_pre_loopback_config;
        }

        if (mbox_cmd[1] == QL_DIAG_CMD_TEST_INT_LOOPBACK)
                config |= ENABLE_INTERNAL_LOOPBACK;

        if (mbox_cmd[1] == QL_DIAG_CMD_TEST_EXT_LOOPBACK)
                config |= ENABLE_EXTERNAL_LOOPBACK;

        config &= ~ENABLE_DCBX;

        DEBUG2(ql4_printk(KERN_INFO, ha, "%s: New port config=%08X\n",
                          __func__, config));

        ha->notify_idc_comp = 1;
        ha->notify_link_up_comp = 1;

        /* get the link state */
        qla4xxx_get_firmware_state(ha);

        status = qla4_83xx_set_port_config(ha, &config);
        if (status != QLA_SUCCESS) {
                ha->notify_idc_comp = 0;
                ha->notify_link_up_comp = 0;
                goto exit_pre_loopback_config;
        }
exit_pre_loopback_config:
        DEBUG2(ql4_printk(KERN_INFO, ha, "%s: status = %s\n", __func__,
                          STATUS(status)));
        return status;
}

static int qla4_83xx_post_loopback_config(struct scsi_qla_host *ha,
                                          uint32_t *mbox_cmd)
{
        int status = QLA_SUCCESS;
        uint32_t config = 0;

        DEBUG2(ql4_printk(KERN_INFO, ha, "%s: in\n", __func__));

        status = qla4_83xx_get_port_config(ha, &config);
        if (status != QLA_SUCCESS)
                goto exit_post_loopback_config;

        DEBUG2(ql4_printk(KERN_INFO, ha, "%s: port config=%08X\n", __func__,
                          config));

        if (mbox_cmd[1] == QL_DIAG_CMD_TEST_INT_LOOPBACK)
                config &= ~ENABLE_INTERNAL_LOOPBACK;
        else if (mbox_cmd[1] == QL_DIAG_CMD_TEST_EXT_LOOPBACK)
                config &= ~ENABLE_EXTERNAL_LOOPBACK;

        config |= ENABLE_DCBX;

        DEBUG2(ql4_printk(KERN_INFO, ha,
                          "%s: Restore default port config=%08X\n", __func__,
                          config));

        ha->notify_idc_comp = 1;
        if (ha->addl_fw_state & FW_ADDSTATE_LINK_UP)
                ha->notify_link_up_comp = 1;

        status = qla4_83xx_set_port_config(ha, &config);
        if (status != QLA_SUCCESS) {
                ql4_printk(KERN_INFO, ha, "%s: Scheduling adapter reset\n",
                           __func__);
                set_bit(DPC_RESET_HA, &ha->dpc_flags);
                clear_bit(AF_LOOPBACK, &ha->flags);
                goto exit_post_loopback_config;
        }

exit_post_loopback_config:
        DEBUG2(ql4_printk(KERN_INFO, ha, "%s: status = %s\n", __func__,
                          STATUS(status)));
        return status;
}

static void qla4xxx_execute_diag_loopback_cmd(struct bsg_job *bsg_job)
{
        struct Scsi_Host *host = iscsi_job_to_shost(bsg_job);
        struct scsi_qla_host *ha = to_qla_host(host);
        struct iscsi_bsg_request *bsg_req = bsg_job->request;
        struct iscsi_bsg_reply *bsg_reply = bsg_job->reply;
        uint8_t *rsp_ptr = NULL;
        uint32_t mbox_cmd[MBOX_REG_COUNT];
        uint32_t mbox_sts[MBOX_REG_COUNT];
        int wait_for_link = 1;
        int status = QLA_ERROR;

        DEBUG2(ql4_printk(KERN_INFO, ha, "%s: in\n", __func__));

        bsg_reply->reply_payload_rcv_len = 0;

        if (test_bit(AF_LOOPBACK, &ha->flags)) {
                ql4_printk(KERN_INFO, ha, "%s: Loopback Diagnostics already in progress. Invalid Request\n",
                           __func__);
                bsg_reply->result = DID_ERROR << 16;
                goto exit_loopback_cmd;
        }

        if (test_bit(DPC_RESET_HA, &ha->dpc_flags)) {
                ql4_printk(KERN_INFO, ha, "%s: Adapter reset in progress. Invalid Request\n",
                           __func__);
                bsg_reply->result = DID_ERROR << 16;
                goto exit_loopback_cmd;
        }

        memcpy(mbox_cmd, &bsg_req->rqst_data.h_vendor.vendor_cmd[1],
               sizeof(uint32_t) * MBOX_REG_COUNT);

        if (is_qla8032(ha) || is_qla8042(ha)) {
                status = qla4_83xx_pre_loopback_config(ha, mbox_cmd);
                if (status != QLA_SUCCESS) {
                        bsg_reply->result = DID_ERROR << 16;
                        goto exit_loopback_cmd;
                }

                status = qla4_83xx_wait_for_loopback_config_comp(ha,
                                                                 wait_for_link);
                if (status != QLA_SUCCESS) {
                        bsg_reply->result = DID_TIME_OUT << 16;
                        goto restore;
                }
        }

        DEBUG2(ql4_printk(KERN_INFO, ha,
                          "%s: mbox_cmd: %08X %08X %08X %08X %08X %08X %08X %08X\n",
                          __func__, mbox_cmd[0], mbox_cmd[1], mbox_cmd[2],
                          mbox_cmd[3], mbox_cmd[4], mbox_cmd[5], mbox_cmd[6],
                          mbox_cmd[7]));

        status = qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, 8, &mbox_cmd[0],
                                &mbox_sts[0]);

        if (status == QLA_SUCCESS)
                bsg_reply->result = DID_OK << 16;
        else
                bsg_reply->result = DID_ERROR << 16;

        DEBUG2(ql4_printk(KERN_INFO, ha,
                          "%s: mbox_sts: %08X %08X %08X %08X %08X %08X %08X %08X\n",
                          __func__, mbox_sts[0], mbox_sts[1], mbox_sts[2],
                          mbox_sts[3], mbox_sts[4], mbox_sts[5], mbox_sts[6],
                          mbox_sts[7]));

        /* Send mbox_sts to application */
        bsg_job->reply_len = sizeof(struct iscsi_bsg_reply) + sizeof(mbox_sts);
        rsp_ptr = ((uint8_t *)bsg_reply) + sizeof(struct iscsi_bsg_reply);
        memcpy(rsp_ptr, mbox_sts, sizeof(mbox_sts));
restore:
        if (is_qla8032(ha) || is_qla8042(ha)) {
                status = qla4_83xx_post_loopback_config(ha, mbox_cmd);
                if (status != QLA_SUCCESS) {
                        bsg_reply->result = DID_ERROR << 16;
                        goto exit_loopback_cmd;
                }

                /* for pre_loopback_config() wait for LINK UP only
                 * if PHY LINK is UP */
                if (!(ha->addl_fw_state & FW_ADDSTATE_LINK_UP))
                        wait_for_link = 0;

                status = qla4_83xx_wait_for_loopback_config_comp(ha,
                                                                 wait_for_link);
                if (status != QLA_SUCCESS) {
                        bsg_reply->result = DID_TIME_OUT << 16;
                        goto exit_loopback_cmd;
                }
        }
exit_loopback_cmd:
        DEBUG2(ql4_printk(KERN_INFO, ha,
                          "%s: bsg_reply->result = x%x, status = %s\n",
                          __func__, bsg_reply->result, STATUS(status)));
        bsg_job_done(bsg_job, bsg_reply->result,
                     bsg_reply->reply_payload_rcv_len);
}

static int qla4xxx_execute_diag_test(struct bsg_job *bsg_job)
{
        struct Scsi_Host *host = iscsi_job_to_shost(bsg_job);
        struct scsi_qla_host *ha = to_qla_host(host);
        struct iscsi_bsg_request *bsg_req = bsg_job->request;
        uint32_t diag_cmd;
        int rval = -EINVAL;

        DEBUG2(ql4_printk(KERN_INFO, ha, "%s: in\n", __func__));

        diag_cmd = bsg_req->rqst_data.h_vendor.vendor_cmd[1];
        if (diag_cmd == MBOX_CMD_DIAG_TEST) {
                switch (bsg_req->rqst_data.h_vendor.vendor_cmd[2]) {
                case QL_DIAG_CMD_TEST_DDR_SIZE:
                case QL_DIAG_CMD_TEST_DDR_RW:
                case QL_DIAG_CMD_TEST_ONCHIP_MEM_RW:
                case QL_DIAG_CMD_TEST_NVRAM:
                case QL_DIAG_CMD_TEST_FLASH_ROM:
                case QL_DIAG_CMD_TEST_DMA_XFER:
                case QL_DIAG_CMD_SELF_DDR_RW:
                case QL_DIAG_CMD_SELF_ONCHIP_MEM_RW:
                        /* Execute diag test for adapter RAM/FLASH */
                        ql4xxx_execute_diag_cmd(bsg_job);
                        /* Always return success as we want to sent bsg_reply
                         * to Application */
                        rval = QLA_SUCCESS;
                        break;

                case QL_DIAG_CMD_TEST_INT_LOOPBACK:
                case QL_DIAG_CMD_TEST_EXT_LOOPBACK:
                        /* Execute diag test for Network */
                        qla4xxx_execute_diag_loopback_cmd(bsg_job);
                        /* Always return success as we want to sent bsg_reply
                         * to Application */
                        rval = QLA_SUCCESS;
                        break;
                default:
                        ql4_printk(KERN_ERR, ha, "%s: Invalid diag test: 0x%x\n",
                                   __func__,
                                   bsg_req->rqst_data.h_vendor.vendor_cmd[2]);
                }
        } else if ((diag_cmd == MBOX_CMD_SET_LED_CONFIG) ||
                   (diag_cmd == MBOX_CMD_GET_LED_CONFIG)) {
                ql4xxx_execute_diag_cmd(bsg_job);
                rval = QLA_SUCCESS;
        } else {
                ql4_printk(KERN_ERR, ha, "%s: Invalid diag cmd: 0x%x\n",
                           __func__, diag_cmd);
        }

        return rval;
}

/**
 * qla4xxx_process_vendor_specific - handle vendor specific bsg request
 * @bsg_job: iscsi_bsg_job to handle
 **/
int qla4xxx_process_vendor_specific(struct bsg_job *bsg_job)
{
        struct iscsi_bsg_reply *bsg_reply = bsg_job->reply;
        struct iscsi_bsg_request *bsg_req = bsg_job->request;
        struct Scsi_Host *host = iscsi_job_to_shost(bsg_job);
        struct scsi_qla_host *ha = to_qla_host(host);

        switch (bsg_req->rqst_data.h_vendor.vendor_cmd[0]) {
        case QLISCSI_VND_READ_FLASH:
                return qla4xxx_read_flash(bsg_job);

        case QLISCSI_VND_UPDATE_FLASH:
                return qla4xxx_update_flash(bsg_job);

        case QLISCSI_VND_GET_ACB_STATE:
                return qla4xxx_get_acb_state(bsg_job);

        case QLISCSI_VND_READ_NVRAM:
                return qla4xxx_read_nvram(bsg_job);

        case QLISCSI_VND_UPDATE_NVRAM:
                return qla4xxx_update_nvram(bsg_job);

        case QLISCSI_VND_RESTORE_DEFAULTS:
                return qla4xxx_restore_defaults(bsg_job);

        case QLISCSI_VND_GET_ACB:
                return qla4xxx_bsg_get_acb(bsg_job);

        case QLISCSI_VND_DIAG_TEST:
                return qla4xxx_execute_diag_test(bsg_job);

        default:
                ql4_printk(KERN_ERR, ha, "%s: invalid BSG vendor command: "
                           "0x%x\n", __func__, bsg_req->msgcode);
                bsg_reply->result = (DID_ERROR << 16);
                bsg_reply->reply_payload_rcv_len = 0;
                bsg_job_done(bsg_job, bsg_reply->result,
                             bsg_reply->reply_payload_rcv_len);
                return -ENOSYS;
        }
}

/**
 * qla4xxx_bsg_request - handle bsg request from ISCSI transport
 * @bsg_job: iscsi_bsg_job to handle
 */
int qla4xxx_bsg_request(struct bsg_job *bsg_job)
{
        struct iscsi_bsg_request *bsg_req = bsg_job->request;
        struct Scsi_Host *host = iscsi_job_to_shost(bsg_job);
        struct scsi_qla_host *ha = to_qla_host(host);

        switch (bsg_req->msgcode) {
        case ISCSI_BSG_HST_VENDOR:
                return qla4xxx_process_vendor_specific(bsg_job);

        default:
                ql4_printk(KERN_ERR, ha, "%s: invalid BSG command: 0x%x\n",
                           __func__, bsg_req->msgcode);
        }

        return -ENOSYS;
}