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path: root/drivers/scsi/qla4xxx/ql4_bsg.c
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Diffstat (limited to 'drivers/scsi/qla4xxx/ql4_bsg.c')
-rw-r--r--drivers/scsi/qla4xxx/ql4_bsg.c209
1 files changed, 209 insertions, 0 deletions
diff --git a/drivers/scsi/qla4xxx/ql4_bsg.c b/drivers/scsi/qla4xxx/ql4_bsg.c
new file mode 100644
index 000000000000..daa2b0f8e309
--- /dev/null
+++ b/drivers/scsi/qla4xxx/ql4_bsg.c
@@ -0,0 +1,209 @@
+/*
+ * QLogic iSCSI HBA Driver
+ * Copyright (c) 2011 QLogic Corporation
+ *
+ * See LICENSE.qla4xxx for copyright and licensing details.
+ */
+
+#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 sg_cnt;
+ uint32_t offset = 0;
+ uint32_t length = 0;
+ dma_addr_t flash_dma;
+ uint8_t *flash = NULL;
+ int rval = 0;
+
+ bsg_reply->reply_payload_rcv_len = 0;
+
+ if (unlikely(pci_channel_offline(ha->pdev)))
+ return -EINVAL;
+
+ if (ha->flash_state != QLFLASH_WAITING)
+ return -EBUSY;
+
+ /* TODO: Add check for adapter online, reset active?? */
+ sg_cnt = dma_map_sg(&ha->pdev->dev, bsg_job->reply_payload.sg_list,
+ bsg_job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
+
+ if (!sg_cnt)
+ return -ENOMEM;
+
+ if (sg_cnt != bsg_job->reply_payload.sg_cnt) {
+ ql4_printk(KERN_ERR, ha, "dma mapping resulted in different"
+ " sg counts, sg_cnt: %x dma_sg_cnt: %x\n",
+ bsg_job->reply_payload.sg_cnt, sg_cnt);
+ rval = -EAGAIN;
+ goto unmap_sg;
+ }
+
+ 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 unmap_sg;
+ }
+
+ ha->flash_state = QLFLASH_READING;
+ if (qla4xxx_get_flash(ha, flash_dma, offset, length))
+ bsg_reply->result = (DID_ERROR << 16);
+ else {
+ sg_copy_from_buffer(bsg_job->reply_payload.sg_list,
+ bsg_job->reply_payload.sg_cnt,
+ flash, length);
+
+ bsg_reply->result = DID_OK;
+ bsg_reply->reply_payload_rcv_len = length;
+ }
+
+ if (flash)
+ dma_free_coherent(&ha->pdev->dev, length, flash, flash_dma);
+
+ ha->flash_state = QLFLASH_WAITING;
+unmap_sg:
+ dma_unmap_sg(&ha->pdev->dev, bsg_job->reply_payload.sg_list,
+ bsg_job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
+ if (!rval)
+ bsg_job_done(bsg_job, bsg_reply->result,
+ bsg_reply->reply_payload_rcv_len);
+ 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 sg_cnt;
+ uint32_t length = 0;
+ uint32_t offset = 0;
+ uint32_t options = 0;
+ dma_addr_t flash_dma;
+ uint8_t *flash = NULL;
+ int rval = 0;
+
+ bsg_reply->reply_payload_rcv_len = 0;
+
+ if (unlikely(pci_channel_offline(ha->pdev)))
+ return -EINVAL;
+
+ if (ha->flash_state != QLFLASH_WAITING)
+ return -EBUSY;
+
+ sg_cnt = dma_map_sg(&ha->pdev->dev, bsg_job->request_payload.sg_list,
+ bsg_job->request_payload.sg_cnt, DMA_TO_DEVICE);
+
+ if (!sg_cnt)
+ return -ENOMEM;
+
+ if (sg_cnt != bsg_job->request_payload.sg_cnt) {
+ ql4_printk(KERN_ERR, ha, "dma mapping resulted in different "
+ "sg counts request_sg_cnt: %x dma_request_sg_cnt: "
+ "%x\n", bsg_job->request_payload.sg_cnt, sg_cnt);
+ rval = -EAGAIN;
+ goto unmap_sg;
+ }
+
+ 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 unmap_sg;
+ }
+
+ ha->flash_state = QLFLASH_WRITING;
+ sg_copy_to_buffer(bsg_job->request_payload.sg_list,
+ bsg_job->request_payload.sg_cnt, flash, length);
+
+ if (qla4xxx_set_flash(ha, flash_dma, offset, length, options))
+ bsg_reply->result = (DID_ERROR << 16);
+ else {
+ bsg_reply->result = DID_OK;
+ bsg_reply->reply_payload_rcv_len = length;
+ }
+
+ if (flash)
+ dma_free_coherent(&ha->pdev->dev, length, flash, flash_dma);
+ ha->flash_state = QLFLASH_WAITING;
+unmap_sg:
+ dma_unmap_sg(&ha->pdev->dev, bsg_job->reply_payload.sg_list,
+ bsg_job->reply_payload.sg_cnt, DMA_TO_DEVICE);
+
+ if (!rval)
+ bsg_job_done(bsg_job, bsg_reply->result,
+ bsg_reply->reply_payload_rcv_len);
+ return rval;
+}
+
+/**
+ * qla4xxx_process_vendor_specific - handle vendor specific bsg request
+ * @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);
+
+ 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
+ * @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;
+}
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-18 22:44:50 +0300