1 files changed, 64 insertions, 62 deletions

diff --git a/drivers/ieee1394/sbp2.c b/drivers/ieee1394/sbp2.c
index 18d7eda38851..eca92eb475a1 100644
--- a/drivers/ieee1394/sbp2.c
+++ b/drivers/ieee1394/sbp2.c
@@ -137,15 +137,15 @@ MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device (default = 1)"
 /*
  * SCSI inquiry hack for really badly behaved sbp2 devices. Turn this on
  * if your sbp2 device is not properly handling the SCSI inquiry command.
- * This hack makes the inquiry look more like a typical MS Windows
- * inquiry.
+ * This hack makes the inquiry look more like a typical MS Windows inquiry
+ * by enforcing 36 byte inquiry and avoiding access to mode_sense page 8.
  *
  * If force_inquiry_hack=1 is required for your device to work,
  * please submit the logged sbp2_firmware_revision value of this device to
  * the linux1394-devel mailing list.
  */
 static int force_inquiry_hack;
-module_param(force_inquiry_hack, int, 0444);
+module_param(force_inquiry_hack, int, 0644);
 MODULE_PARM_DESC(force_inquiry_hack, "Force SCSI inquiry hack (default = 0)");
 
 /*
@@ -264,18 +264,17 @@ static struct hpsb_protocol_driver sbp2_driver = {
         },
 };
 
-
-/* List of device firmware's that require a forced 36 byte inquiry.  */
+/*
+ * List of device firmwares that require the inquiry hack.
+ * Yields a few false positives but did not break other devices so far.
+ */
 static u32 sbp2_broken_inquiry_list[] = {
-        0x00002800,     /* Stefan Richter <richtest@bauwesen.tu-cottbus.de> */
+        0x00002800,     /* Stefan Richter <stefanr@s5r6.in-berlin.de> */
                         /* DViCO Momobay CX-1 */
         0x00000200      /* Andreas Plesch <plesch@fas.harvard.edu> */
                         /* QPS Fire DVDBurner */
 };
 
-#define NUM_BROKEN_INQUIRY_DEVS \
-        (sizeof(sbp2_broken_inquiry_list)/sizeof(*sbp2_broken_inquiry_list))
-
 /**************************************
  * General utility functions
  **************************************/
@@ -643,9 +642,15 @@ static int sbp2_remove(struct device *dev)
         if (!scsi_id)
                 return 0;
 
-        /* Trigger shutdown functions in scsi's highlevel. */
-        if (scsi_id->scsi_host)
+        if (scsi_id->scsi_host) {
+                /* Get rid of enqueued commands if there is no chance to
+                 * send them. */
+                if (!sbp2util_node_is_available(scsi_id))
+                        sbp2scsi_complete_all_commands(scsi_id, DID_NO_CONNECT);
+                /* scsi_remove_device() will trigger shutdown functions of SCSI
+                 * highlevel drivers which would deadlock if blocked. */
                 scsi_unblock_requests(scsi_id->scsi_host);
+        }
         sdev = scsi_id->sdev;
         if (sdev) {
                 scsi_id->sdev = NULL;
@@ -742,11 +747,6 @@ static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud
                 hi->host = ud->ne->host;
                 INIT_LIST_HEAD(&hi->scsi_ids);
 
-                /* Register our sbp2 status address space... */
-                hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host, &sbp2_ops,
-                                        SBP2_STATUS_FIFO_ADDRESS,
-                                        SBP2_STATUS_FIFO_ADDRESS +
-                                        SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(SBP2_MAX_UDS_PER_NODE+1));
 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
                 /* Handle data movement if physical dma is not
                  * enabled/supportedon host controller */
@@ -759,6 +759,18 @@ static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud
 
         list_add_tail(&scsi_id->scsi_list, &hi->scsi_ids);
 
+        /* Register the status FIFO address range. We could use the same FIFO
+         * for targets at different nodes. However we need different FIFOs per
+         * target in order to support multi-unit devices. */
+        scsi_id->status_fifo_addr = hpsb_allocate_and_register_addrspace(
+                        &sbp2_highlevel, ud->ne->host, &sbp2_ops,
+                        sizeof(struct sbp2_status_block), sizeof(quadlet_t),
+                        ~0ULL, ~0ULL);
+        if (!scsi_id->status_fifo_addr) {
+                SBP2_ERR("failed to allocate status FIFO address range");
+                goto failed_alloc;
+        }
+
         /* Register our host with the SCSI stack. */
         scsi_host = scsi_host_alloc(&scsi_driver_template,
                                     sizeof(unsigned long));
@@ -997,6 +1009,10 @@ static void sbp2_remove_device(struct scsi_id_instance_data *scsi_id)
                 SBP2_DMA_FREE("single query logins data");
         }
 
+        if (scsi_id->status_fifo_addr)
+                hpsb_unregister_addrspace(&sbp2_highlevel, hi->host,
+                        scsi_id->status_fifo_addr);
+
         scsi_id->ud->device.driver_data = NULL;
 
         SBP2_DEBUG("SBP-2 device removed, SCSI ID = %d", scsi_id->ud->id);
@@ -1075,11 +1091,10 @@ static int sbp2_query_logins(struct scsi_id_instance_data *scsi_id)
                 ORB_SET_QUERY_LOGINS_RESP_LENGTH(sizeof(struct sbp2_query_logins_response));
         SBP2_DEBUG("sbp2_query_logins: reserved_resp_length initialized");
 
-        scsi_id->query_logins_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO +
-                                                    SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id);
-        scsi_id->query_logins_orb->status_FIFO_hi = (ORB_SET_NODE_ID(hi->host->node_id) |
-                                                     SBP2_STATUS_FIFO_ADDRESS_HI);
-        SBP2_DEBUG("sbp2_query_logins: status FIFO initialized");
+        scsi_id->query_logins_orb->status_fifo_hi =
+                ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id);
+        scsi_id->query_logins_orb->status_fifo_lo =
+                ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr);
 
         sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb));
 
@@ -1184,11 +1199,10 @@ static int sbp2_login_device(struct scsi_id_instance_data *scsi_id)
                 ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response));
         SBP2_DEBUG("sbp2_login_device: passwd_resp_lengths initialized");
 
-        scsi_id->login_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO +
-                                             SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id);
-        scsi_id->login_orb->status_FIFO_hi = (ORB_SET_NODE_ID(hi->host->node_id) |
-                                              SBP2_STATUS_FIFO_ADDRESS_HI);
-        SBP2_DEBUG("sbp2_login_device: status FIFO initialized");
+        scsi_id->login_orb->status_fifo_hi =
+                ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id);
+        scsi_id->login_orb->status_fifo_lo =
+                ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr);
 
         /*
          * Byte swap ORB if necessary
@@ -1301,10 +1315,10 @@ static int sbp2_logout_device(struct scsi_id_instance_data *scsi_id)
         scsi_id->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
 
         scsi_id->logout_orb->reserved5 = 0x0;
-        scsi_id->logout_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO +
-                                              SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id);
-        scsi_id->logout_orb->status_FIFO_hi = (ORB_SET_NODE_ID(hi->host->node_id) |
-                                               SBP2_STATUS_FIFO_ADDRESS_HI);
+        scsi_id->logout_orb->status_fifo_hi =
+                ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id);
+        scsi_id->logout_orb->status_fifo_lo =
+                ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr);
 
         /*
          * Byte swap ORB if necessary
@@ -1366,10 +1380,10 @@ static int sbp2_reconnect_device(struct scsi_id_instance_data *scsi_id)
         scsi_id->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
 
         scsi_id->reconnect_orb->reserved5 = 0x0;
-        scsi_id->reconnect_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO +
-                                                 SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id);
-        scsi_id->reconnect_orb->status_FIFO_hi =
-                (ORB_SET_NODE_ID(hi->host->node_id) | SBP2_STATUS_FIFO_ADDRESS_HI);
+        scsi_id->reconnect_orb->status_fifo_hi =
+                ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id);
+        scsi_id->reconnect_orb->status_fifo_lo =
+                ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr);
 
         /*
          * Byte swap ORB if necessary
@@ -1560,7 +1574,7 @@ static void sbp2_parse_unit_directory(struct scsi_id_instance_data *scsi_id,
         /* Check for a blacklisted set of devices that require us to force
          * a 36 byte host inquiry. This can be overriden as a module param
          * (to force all hosts).  */
-        for (i = 0; i < NUM_BROKEN_INQUIRY_DEVS; i++) {
+        for (i = 0; i < ARRAY_SIZE(sbp2_broken_inquiry_list); i++) {
                 if ((firmware_revision & 0xffff00) ==
                                 sbp2_broken_inquiry_list[i]) {
                         SBP2_WARN("Node " NODE_BUS_FMT ": Using 36byte inquiry workaround",
@@ -2007,18 +2021,6 @@ static int sbp2_send_command(struct scsi_id_instance_data *scsi_id,
         }
 
         /*
-         * The scsi stack sends down a request_bufflen which does not match the
-         * length field in the scsi cdb. This causes some sbp2 devices to
-         * reject this inquiry command. Fix the request_bufflen.
-         */
-        if (*cmd == INQUIRY) {
-                if (force_inquiry_hack || scsi_id->workarounds & SBP2_BREAKAGE_INQUIRY_HACK)
-                        request_bufflen = cmd[4] = 0x24;
-                else
-                        request_bufflen = cmd[4];
-        }
-
-        /*
          * Now actually fill in the comamnd orb and sbp2 s/g list
          */
         sbp2_create_command_orb(scsi_id, command, cmd, SCpnt->use_sg,
@@ -2082,9 +2084,7 @@ static void sbp2_check_sbp2_response(struct scsi_id_instance_data *scsi_id,
 
         SBP2_DEBUG("sbp2_check_sbp2_response");
 
-        switch (SCpnt->cmnd[0]) {
-
-        case INQUIRY:
+        if (SCpnt->cmnd[0] == INQUIRY && (SCpnt->cmnd[1] & 3) == 0) {
                 /*
                  * Make sure data length is ok. Minimum length is 36 bytes
                  */
@@ -2097,13 +2097,7 @@ static void sbp2_check_sbp2_response(struct scsi_id_instance_data *scsi_id,
                  */
                 scsi_buf[2] |= 2;
                 scsi_buf[3] = (scsi_buf[3] & 0xf0) | 2;
-
-                break;
-
-        default:
-                break;
         }
-        return;
 }
 
 /*
@@ -2114,7 +2108,6 @@ static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, int dest
 {
         struct sbp2scsi_host_info *hi;
         struct scsi_id_instance_data *scsi_id = NULL, *scsi_id_tmp;
-        u32 id;
         struct scsi_cmnd *SCpnt = NULL;
         u32 scsi_status = SBP2_SCSI_STATUS_GOOD;
         struct sbp2_command_info *command;
@@ -2137,12 +2130,12 @@ static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, int dest
         }
 
         /*
-         * Find our scsi_id structure by looking at the status fifo address written to by
-         * the sbp2 device.
+         * Find our scsi_id structure by looking at the status fifo address
+         * written to by the sbp2 device.
          */
-        id = SBP2_STATUS_FIFO_OFFSET_TO_ENTRY((u32)(addr - SBP2_STATUS_FIFO_ADDRESS));
         list_for_each_entry(scsi_id_tmp, &hi->scsi_ids, scsi_list) {
-                if (scsi_id_tmp->ne->nodeid == nodeid && scsi_id_tmp->ud->id == id) {
+                if (scsi_id_tmp->ne->nodeid == nodeid &&
+                    scsi_id_tmp->status_fifo_addr == addr) {
                         scsi_id = scsi_id_tmp;
                         break;
                 }
@@ -2483,7 +2476,16 @@ static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id,
 
 static int sbp2scsi_slave_alloc(struct scsi_device *sdev)
 {
-        ((struct scsi_id_instance_data *)sdev->host->hostdata[0])->sdev = sdev;
+        struct scsi_id_instance_data *scsi_id =
+                (struct scsi_id_instance_data *)sdev->host->hostdata[0];
+
+        scsi_id->sdev = sdev;
+
+        if (force_inquiry_hack ||
+            scsi_id->workarounds & SBP2_BREAKAGE_INQUIRY_HACK) {
+                sdev->inquiry_len = 36;
+                sdev->skip_ms_page_8 = 1;
+        }
         return 0;
 }