+#define SDEBUG_MAX_TGTPGS_ARR_SZ 1412
+
+static int resp_report_tgtpgs(struct scsi_cmnd * scp,
+ struct sdebug_dev_info * devip)
+{
+ unsigned char *cmd = (unsigned char *)scp->cmnd;
+ unsigned char * arr;
+ int host_no = devip->sdbg_host->shost->host_no;
+ int n, ret, alen, rlen;
+ int port_group_a, port_group_b, port_a, port_b;
+
+ alen = ((cmd[6] << 24) + (cmd[7] << 16) + (cmd[8] << 8)
+ + cmd[9]);
+
+ arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC);
+ if (! arr)
+ return DID_REQUEUE << 16;
+ /*
+ * EVPD page 0x88 states we have two ports, one
+ * real and a fake port with no device connected.
+ * So we create two port groups with one port each
+ * and set the group with port B to unavailable.
+ */
+ port_a = 0x1; /* relative port A */
+ port_b = 0x2; /* relative port B */
+ port_group_a = (((host_no + 1) & 0x7f) << 8) +
+ (devip->channel & 0x7f);
+ port_group_b = (((host_no + 1) & 0x7f) << 8) +
+ (devip->channel & 0x7f) + 0x80;
+
+ /*
+ * The asymmetric access state is cycled according to the host_id.
+ */
+ n = 4;
+ if (0 == scsi_debug_vpd_use_hostno) {
+ arr[n++] = host_no % 3; /* Asymm access state */
+ arr[n++] = 0x0F; /* claim: all states are supported */
+ } else {
+ arr[n++] = 0x0; /* Active/Optimized path */
+ arr[n++] = 0x01; /* claim: only support active/optimized paths */
+ }
+ arr[n++] = (port_group_a >> 8) & 0xff;
+ arr[n++] = port_group_a & 0xff;
+ arr[n++] = 0; /* Reserved */
+ arr[n++] = 0; /* Status code */
+ arr[n++] = 0; /* Vendor unique */
+ arr[n++] = 0x1; /* One port per group */
+ arr[n++] = 0; /* Reserved */
+ arr[n++] = 0; /* Reserved */
+ arr[n++] = (port_a >> 8) & 0xff;
+ arr[n++] = port_a & 0xff;
+ arr[n++] = 3; /* Port unavailable */
+ arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */
+ arr[n++] = (port_group_b >> 8) & 0xff;
+ arr[n++] = port_group_b & 0xff;
+ arr[n++] = 0; /* Reserved */
+ arr[n++] = 0; /* Status code */
+ arr[n++] = 0; /* Vendor unique */
+ arr[n++] = 0x1; /* One port per group */
+ arr[n++] = 0; /* Reserved */
+ arr[n++] = 0; /* Reserved */
+ arr[n++] = (port_b >> 8) & 0xff;
+ arr[n++] = port_b & 0xff;
+
+ rlen = n - 4;
+ arr[0] = (rlen >> 24) & 0xff;
+ arr[1] = (rlen >> 16) & 0xff;
+ arr[2] = (rlen >> 8) & 0xff;
+ arr[3] = rlen & 0xff;
+
+ /*
+ * Return the smallest value of either
+ * - The allocated length
+ * - The constructed command length
+ * - The maximum array size
+ */
+ rlen = min(alen,n);
+ ret = fill_from_dev_buffer(scp, arr,
+ min(rlen, SDEBUG_MAX_TGTPGS_ARR_SZ));
+ kfree(arr);
+ return ret;
+}
+