scsi: mpi3mr: Add ioctl support for HDB

Add interface for applications to manage the host diagnostic buffers and
update the automatic diag buffer capture triggers.

Co-developed-by: Sathya Prakash <[e-mail]>
Signed-off-by: Sathya Prakash <[e-mail]>
Signed-off-by: Ranjan Kumar <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Martin K. Petersen <[e-mail]>

drivers/scsi/mpi3mr/mpi3mr.h

···
 #define MPI3MR_HDB_TRIGGER_TYPE_SOFT_RESET	4
 #define MPI3MR_HDB_TRIGGER_TYPE_FW_RELEASED	5
 
+#define MPI3MR_HDB_REFRESH_TYPE_RESERVED       0
+#define MPI3MR_HDB_REFRESH_TYPE_CURRENT                1
+#define MPI3MR_HDB_REFRESH_TYPE_DEFAULT                2
+#define MPI3MR_HDB_HDB_REFRESH_TYPE_PERSISTENT 3
+
+#define MPI3MR_DEFAULT_HDB_SZ  (4 * 1024 * 1024)
+#define MPI3MR_MAX_NUM_HDB     2
+
+#define MPI3MR_HDB_QUERY_ELEMENT_TRIGGER_FORMAT_INDEX   0
+#define MPI3MR_HDB_QUERY_ELEMENT_TRIGGER_FORMAT_DATA    1
+
+
 /* SGE Flag definition */
 #define MPI3MR_SGEFLAGS_SYSTEM_SIMPLE_END_OF_LIST \
 	(MPI3_SGE_FLAGS_ELEMENT_TYPE_SIMPLE | MPI3_SGE_FLAGS_DLAS_SYSTEM | \

drivers/scsi/mpi3mr/mpi3mr_app.c

···
 }
 
 /**
+ * mpi3mr_bsg_refresh_hdb_triggers - Refresh HDB trigger data
+ * @mrioc: Adapter instance reference
+ * @job: BSG Job pointer
+ *
+ * This function reads the controller trigger config page as
+ * defined by the input page type and refreshes the driver's
+ * local trigger information structures with the controller's
+ * config page data.
+ *
+ * Return: 0 on success and proper error codes on failure
+ */
+static long
+mpi3mr_bsg_refresh_hdb_triggers(struct mpi3mr_ioc *mrioc,
+				struct bsg_job *job)
+{
+	struct mpi3mr_bsg_out_refresh_hdb_triggers refresh_triggers;
+	uint32_t data_out_sz;
+	u8 page_action;
+	long rval = -EINVAL;
+
+	data_out_sz = job->request_payload.payload_len;
+
+	if (data_out_sz != sizeof(refresh_triggers)) {
+		dprint_bsg_err(mrioc, "%s: invalid size argument\n",
+		    __func__);
+		return rval;
+	}
+
+	if (mrioc->unrecoverable) {
+		dprint_bsg_err(mrioc, "%s: unrecoverable controller\n",
+		    __func__);
+		return -EFAULT;
+	}
+	if (mrioc->reset_in_progress) {
+		dprint_bsg_err(mrioc, "%s: reset in progress\n", __func__);
+		return -EAGAIN;
+	}
+
+	sg_copy_to_buffer(job->request_payload.sg_list,
+	    job->request_payload.sg_cnt,
+	    &refresh_triggers, sizeof(refresh_triggers));
+
+	switch (refresh_triggers.page_type) {
+	case MPI3MR_HDB_REFRESH_TYPE_CURRENT:
+		page_action = MPI3_CONFIG_ACTION_READ_CURRENT;
+		break;
+	case MPI3MR_HDB_REFRESH_TYPE_DEFAULT:
+		page_action = MPI3_CONFIG_ACTION_READ_DEFAULT;
+		break;
+	case MPI3MR_HDB_HDB_REFRESH_TYPE_PERSISTENT:
+		page_action = MPI3_CONFIG_ACTION_READ_PERSISTENT;
+		break;
+	default:
+		dprint_bsg_err(mrioc,
+		    "%s: unsupported refresh trigger, page_type %d\n",
+		    __func__, refresh_triggers.page_type);
+		return rval;
+	}
+	rval = mpi3mr_refresh_trigger(mrioc, page_action);
+
+	return rval;
+}
+
+/**
+ * mpi3mr_bsg_upload_hdb - Upload a specific HDB to user space
+ * @mrioc: Adapter instance reference
+ * @job: BSG Job pointer
+ *
+ * Return: 0 on success and proper error codes on failure
+ */
+static long mpi3mr_bsg_upload_hdb(struct mpi3mr_ioc *mrioc,
+				  struct bsg_job *job)
+{
+	struct mpi3mr_bsg_out_upload_hdb upload_hdb;
+	struct diag_buffer_desc *diag_buffer;
+	uint32_t data_out_size;
+	uint32_t data_in_size;
+
+	data_out_size = job->request_payload.payload_len;
+	data_in_size = job->reply_payload.payload_len;
+
+	if (data_out_size != sizeof(upload_hdb)) {
+		dprint_bsg_err(mrioc, "%s: invalid size argument\n",
+		    __func__);
+		return -EINVAL;
+	}
+
+	sg_copy_to_buffer(job->request_payload.sg_list,
+			  job->request_payload.sg_cnt,
+			  &upload_hdb, sizeof(upload_hdb));
+
+	if ((!upload_hdb.length) || (data_in_size != upload_hdb.length)) {
+		dprint_bsg_err(mrioc, "%s: invalid length argument\n",
+		    __func__);
+		return -EINVAL;
+	}
+	diag_buffer = mpi3mr_diag_buffer_for_type(mrioc, upload_hdb.buf_type);
+	if ((!diag_buffer) || (!diag_buffer->addr)) {
+		dprint_bsg_err(mrioc, "%s: invalid buffer type %d\n",
+		    __func__, upload_hdb.buf_type);
+		return -EINVAL;
+	}
+
+	if ((diag_buffer->status != MPI3MR_HDB_BUFSTATUS_RELEASED) &&
+	    (diag_buffer->status != MPI3MR_HDB_BUFSTATUS_POSTED_PAUSED)) {
+		dprint_bsg_err(mrioc,
+		    "%s: invalid buffer status %d for type %d\n",
+		    __func__, diag_buffer->status, upload_hdb.buf_type);
+		return -EINVAL;
+	}
+
+	if ((upload_hdb.start_offset + upload_hdb.length) > diag_buffer->size) {
+		dprint_bsg_err(mrioc,
+		    "%s: invalid start offset %d, length %d for type %d\n",
+		    __func__, upload_hdb.start_offset, upload_hdb.length,
+		    upload_hdb.buf_type);
+		return -EINVAL;
+	}
+	sg_copy_from_buffer(job->reply_payload.sg_list,
+			    job->reply_payload.sg_cnt,
+	    (diag_buffer->addr + upload_hdb.start_offset),
+	    data_in_size);
+	return 0;
+}
+
+/**
+ * mpi3mr_bsg_repost_hdb - Re-post HDB
+ * @mrioc: Adapter instance reference
+ * @job: BSG job pointer
+ *
+ * This function retrieves the HDB descriptor corresponding to a
+ * given buffer type and if the HDB is in released status then
+ * posts the HDB with the firmware.
+ *
+ * Return: 0 on success and proper error codes on failure
+ */
+static long mpi3mr_bsg_repost_hdb(struct mpi3mr_ioc *mrioc,
+				  struct bsg_job *job)
+{
+	struct mpi3mr_bsg_out_repost_hdb repost_hdb;
+	struct diag_buffer_desc *diag_buffer;
+	uint32_t data_out_sz;
+
+	data_out_sz = job->request_payload.payload_len;
+
+	if (data_out_sz != sizeof(repost_hdb)) {
+		dprint_bsg_err(mrioc, "%s: invalid size argument\n",
+		    __func__);
+		return -EINVAL;
+	}
+	if (mrioc->unrecoverable) {
+		dprint_bsg_err(mrioc, "%s: unrecoverable controller\n",
+		    __func__);
+		return -EFAULT;
+	}
+	if (mrioc->reset_in_progress) {
+		dprint_bsg_err(mrioc, "%s: reset in progress\n", __func__);
+		return -EAGAIN;
+	}
+
+	sg_copy_to_buffer(job->request_payload.sg_list,
+			  job->request_payload.sg_cnt,
+			  &repost_hdb, sizeof(repost_hdb));
+
+	diag_buffer = mpi3mr_diag_buffer_for_type(mrioc, repost_hdb.buf_type);
+	if ((!diag_buffer) || (!diag_buffer->addr)) {
+		dprint_bsg_err(mrioc, "%s: invalid buffer type %d\n",
+		    __func__, repost_hdb.buf_type);
+		return -EINVAL;
+	}
+
+	if (diag_buffer->status != MPI3MR_HDB_BUFSTATUS_RELEASED) {
+		dprint_bsg_err(mrioc,
+		    "%s: invalid buffer status %d for type %d\n",
+		    __func__, diag_buffer->status, repost_hdb.buf_type);
+		return -EINVAL;
+	}
+
+	if (mpi3mr_issue_diag_buf_post(mrioc, diag_buffer)) {
+		dprint_bsg_err(mrioc, "%s: post failed for type %d\n",
+		    __func__, repost_hdb.buf_type);
+		return -EFAULT;
+	}
+	mpi3mr_set_trigger_data_in_hdb(diag_buffer,
+	    MPI3MR_HDB_TRIGGER_TYPE_UNKNOWN, NULL, 1);
+
+	return 0;
+}
+
+/**
+ * mpi3mr_bsg_query_hdb - Handler for query HDB command
+ * @mrioc: Adapter instance reference
+ * @job: BSG job pointer
+ *
+ * This function prepares and copies the host diagnostic buffer
+ * entries to the user buffer.
+ *
+ * Return: 0 on success and proper error codes on failure
+ */
+static long mpi3mr_bsg_query_hdb(struct mpi3mr_ioc *mrioc,
+				 struct bsg_job *job)
+{
+	long rval = 0;
+	struct mpi3mr_bsg_in_hdb_status *hbd_status;
+	struct mpi3mr_hdb_entry *hbd_status_entry;
+	u32 length, min_length;
+	u8 i;
+	struct diag_buffer_desc *diag_buffer;
+	uint32_t data_in_sz = 0;
+
+	data_in_sz = job->request_payload.payload_len;
+
+	length = (sizeof(*hbd_status) + ((MPI3MR_MAX_NUM_HDB - 1) *
+		    sizeof(*hbd_status_entry)));
+	hbd_status = kmalloc(length, GFP_KERNEL);
+	if (!hbd_status)
+		return -ENOMEM;
+	hbd_status_entry = &hbd_status->entry[0];
+
+	hbd_status->num_hdb_types = MPI3MR_MAX_NUM_HDB;
+	for (i = 0; i < MPI3MR_MAX_NUM_HDB; i++) {
+		diag_buffer = &mrioc->diag_buffers[i];
+		hbd_status_entry->buf_type = diag_buffer->type;
+		hbd_status_entry->status = diag_buffer->status;
+		hbd_status_entry->trigger_type = diag_buffer->trigger_type;
+		memcpy(&hbd_status_entry->trigger_data,
+		    &diag_buffer->trigger_data,
+		    sizeof(hbd_status_entry->trigger_data));
+		hbd_status_entry->size = (diag_buffer->size / 1024);
+		hbd_status_entry++;
+	}
+	hbd_status->element_trigger_format =
+		MPI3MR_HDB_QUERY_ELEMENT_TRIGGER_FORMAT_DATA;
+
+	if (data_in_sz < 4) {
+		dprint_bsg_err(mrioc, "%s: invalid size passed\n", __func__);
+		rval = -EINVAL;
+		goto out;
+	}
+	min_length = min(data_in_sz, length);
+	if (job->request_payload.payload_len >= min_length) {
+		sg_copy_from_buffer(job->request_payload.sg_list,
+				    job->request_payload.sg_cnt,
+				    hbd_status, min_length);
+		rval = 0;
+	}
+out:
+	kfree(hbd_status);
+	return rval;
+}
+
+
+/**
  * mpi3mr_enable_logdata - Handler for log data enable
  * @mrioc: Adapter instance reference
  * @job: BSG job reference
···
 		break;
 	case MPI3MR_DRVBSG_OPCODE_PELENABLE:
 		rval = mpi3mr_bsg_pel_enable(mrioc, job);
+		break;
+	case MPI3MR_DRVBSG_OPCODE_QUERY_HDB:
+		rval = mpi3mr_bsg_query_hdb(mrioc, job);
+		break;
+	case MPI3MR_DRVBSG_OPCODE_REPOST_HDB:
+		rval = mpi3mr_bsg_repost_hdb(mrioc, job);
+		break;
+	case MPI3MR_DRVBSG_OPCODE_UPLOAD_HDB:
+		rval = mpi3mr_bsg_upload_hdb(mrioc, job);
+		break;
+	case MPI3MR_DRVBSG_OPCODE_REFRESH_HDB_TRIGGERS:
+		rval = mpi3mr_bsg_refresh_hdb_triggers(mrioc, job);
 		break;
 	case MPI3MR_DRVBSG_OPCODE_UNKNOWN:
 	default:

include/uapi/scsi/scsi_bsg_mpi3mr.h

···
  * multiple hdb entries.
  *
  * @num_hdb_types: Number of host diag buffer types supported
+ * @element_trigger_format: Element trigger format
  * @rsvd1: Reserved
  * @rsvd2: Reserved
  * @rsvd3: Reserved
···
  */
 struct mpi3mr_bsg_in_hdb_status {
 	__u8	num_hdb_types;
-	__u8	rsvd1;
+	__u8    element_trigger_format;
 	__u16	rsvd2;
 	__u32	rsvd3;
 	struct mpi3mr_hdb_entry entry[1];