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Subject[PATCH] scsi: target/sbp: remove SBP target driver
I no longer have the time to maintain this subsystem nor the hardware to
test patches with. It also doesn't appear to have any active users so I
doubt anyone will miss it.

Signed-off-by: Chris Boot <bootc@bootc.net>
---
MAINTAINERS | 9 -
drivers/target/Kconfig | 1 -
drivers/target/Makefile | 1 -
drivers/target/sbp/Kconfig | 12 -
drivers/target/sbp/Makefile | 2 -
drivers/target/sbp/sbp_target.c | 2350 -------------------------------
drivers/target/sbp/sbp_target.h | 243 ----
7 files changed, 2618 deletions(-)
delete mode 100644 drivers/target/sbp/Kconfig
delete mode 100644 drivers/target/sbp/Makefile
delete mode 100644 drivers/target/sbp/sbp_target.c
delete mode 100644 drivers/target/sbp/sbp_target.h

diff --git a/MAINTAINERS b/MAINTAINERS
index 56d7d27fc114..81b7db7d68a8 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -6669,15 +6669,6 @@ S: Maintained
T: git git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media.git
F: drivers/media/firewire/

-FIREWIRE SBP-2 TARGET
-M: Chris Boot <bootc@bootc.net>
-L: linux-scsi@vger.kernel.org
-L: target-devel@vger.kernel.org
-L: linux1394-devel@lists.sourceforge.net
-S: Maintained
-T: git git://git.kernel.org/pub/scm/linux/kernel/git/nab/lio-core-2.6.git master
-F: drivers/target/sbp/
-
FIREWIRE SUBSYSTEM
M: Stefan Richter <stefanr@s5r6.in-berlin.de>
L: linux1394-devel@lists.sourceforge.net
diff --git a/drivers/target/Kconfig b/drivers/target/Kconfig
index c163b14774d7..4a5682745ada 100644
--- a/drivers/target/Kconfig
+++ b/drivers/target/Kconfig
@@ -46,6 +46,5 @@ config TCM_USER2
source "drivers/target/loopback/Kconfig"
source "drivers/target/tcm_fc/Kconfig"
source "drivers/target/iscsi/Kconfig"
-source "drivers/target/sbp/Kconfig"

endif
diff --git a/drivers/target/Makefile b/drivers/target/Makefile
index 45634747377e..c13da05af2e2 100644
--- a/drivers/target/Makefile
+++ b/drivers/target/Makefile
@@ -29,4 +29,3 @@ obj-$(CONFIG_TCM_USER2) += target_core_user.o
obj-$(CONFIG_LOOPBACK_TARGET) += loopback/
obj-$(CONFIG_TCM_FC) += tcm_fc/
obj-$(CONFIG_ISCSI_TARGET) += iscsi/
-obj-$(CONFIG_SBP_TARGET) += sbp/
diff --git a/drivers/target/sbp/Kconfig b/drivers/target/sbp/Kconfig
deleted file mode 100644
index 53a1c75f5660..000000000000
--- a/drivers/target/sbp/Kconfig
+++ /dev/null
@@ -1,12 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-only
-config SBP_TARGET
- tristate "FireWire SBP-2 fabric module"
- depends on FIREWIRE
- help
- Say Y or M here to enable SCSI target functionality over FireWire.
- This enables you to expose SCSI devices to other nodes on the FireWire
- bus, for example hard disks. Similar to FireWire Target Disk mode on
- many Apple computers.
-
- To compile this driver as a module, say M here: The module will be
- called sbp-target.
diff --git a/drivers/target/sbp/Makefile b/drivers/target/sbp/Makefile
deleted file mode 100644
index 766f23690013..000000000000
--- a/drivers/target/sbp/Makefile
+++ /dev/null
@@ -1,2 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-only
-obj-$(CONFIG_SBP_TARGET) += sbp_target.o
diff --git a/drivers/target/sbp/sbp_target.c b/drivers/target/sbp/sbp_target.c
deleted file mode 100644
index e4a9b9fe3dfb..000000000000
--- a/drivers/target/sbp/sbp_target.c
+++ /dev/null
@@ -1,2350 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * SBP2 target driver (SCSI over IEEE1394 in target mode)
- *
- * Copyright (C) 2011 Chris Boot <bootc@bootc.net>
- */
-
-#define KMSG_COMPONENT "sbp_target"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/types.h>
-#include <linux/string.h>
-#include <linux/configfs.h>
-#include <linux/ctype.h>
-#include <linux/delay.h>
-#include <linux/firewire.h>
-#include <linux/firewire-constants.h>
-#include <scsi/scsi_proto.h>
-#include <scsi/scsi_tcq.h>
-#include <target/target_core_base.h>
-#include <target/target_core_backend.h>
-#include <target/target_core_fabric.h>
-#include <asm/unaligned.h>
-
-#include "sbp_target.h"
-
-/* FireWire address region for management and command block address handlers */
-static const struct fw_address_region sbp_register_region = {
- .start = CSR_REGISTER_BASE + 0x10000,
- .end = 0x1000000000000ULL,
-};
-
-static const u32 sbp_unit_directory_template[] = {
- 0x1200609e, /* unit_specifier_id: NCITS/T10 */
- 0x13010483, /* unit_sw_version: 1155D Rev 4 */
- 0x3800609e, /* command_set_specifier_id: NCITS/T10 */
- 0x390104d8, /* command_set: SPC-2 */
- 0x3b000000, /* command_set_revision: 0 */
- 0x3c000001, /* firmware_revision: 1 */
-};
-
-#define SESSION_MAINTENANCE_INTERVAL HZ
-
-static atomic_t login_id = ATOMIC_INIT(0);
-
-static void session_maintenance_work(struct work_struct *);
-static int sbp_run_transaction(struct fw_card *, int, int, int, int,
- unsigned long long, void *, size_t);
-
-static int read_peer_guid(u64 *guid, const struct sbp_management_request *req)
-{
- int ret;
- __be32 high, low;
-
- ret = sbp_run_transaction(req->card, TCODE_READ_QUADLET_REQUEST,
- req->node_addr, req->generation, req->speed,
- (CSR_REGISTER_BASE | CSR_CONFIG_ROM) + 3 * 4,
- &high, sizeof(high));
- if (ret != RCODE_COMPLETE)
- return ret;
-
- ret = sbp_run_transaction(req->card, TCODE_READ_QUADLET_REQUEST,
- req->node_addr, req->generation, req->speed,
- (CSR_REGISTER_BASE | CSR_CONFIG_ROM) + 4 * 4,
- &low, sizeof(low));
- if (ret != RCODE_COMPLETE)
- return ret;
-
- *guid = (u64)be32_to_cpu(high) << 32 | be32_to_cpu(low);
-
- return RCODE_COMPLETE;
-}
-
-static struct sbp_session *sbp_session_find_by_guid(
- struct sbp_tpg *tpg, u64 guid)
-{
- struct se_session *se_sess;
- struct sbp_session *sess, *found = NULL;
-
- spin_lock_bh(&tpg->se_tpg.session_lock);
- list_for_each_entry(se_sess, &tpg->se_tpg.tpg_sess_list, sess_list) {
- sess = se_sess->fabric_sess_ptr;
- if (sess->guid == guid)
- found = sess;
- }
- spin_unlock_bh(&tpg->se_tpg.session_lock);
-
- return found;
-}
-
-static struct sbp_login_descriptor *sbp_login_find_by_lun(
- struct sbp_session *session, u32 unpacked_lun)
-{
- struct sbp_login_descriptor *login, *found = NULL;
-
- spin_lock_bh(&session->lock);
- list_for_each_entry(login, &session->login_list, link) {
- if (login->login_lun == unpacked_lun)
- found = login;
- }
- spin_unlock_bh(&session->lock);
-
- return found;
-}
-
-static int sbp_login_count_all_by_lun(
- struct sbp_tpg *tpg,
- u32 unpacked_lun,
- int exclusive)
-{
- struct se_session *se_sess;
- struct sbp_session *sess;
- struct sbp_login_descriptor *login;
- int count = 0;
-
- spin_lock_bh(&tpg->se_tpg.session_lock);
- list_for_each_entry(se_sess, &tpg->se_tpg.tpg_sess_list, sess_list) {
- sess = se_sess->fabric_sess_ptr;
-
- spin_lock_bh(&sess->lock);
- list_for_each_entry(login, &sess->login_list, link) {
- if (login->login_lun != unpacked_lun)
- continue;
-
- if (!exclusive || login->exclusive)
- count++;
- }
- spin_unlock_bh(&sess->lock);
- }
- spin_unlock_bh(&tpg->se_tpg.session_lock);
-
- return count;
-}
-
-static struct sbp_login_descriptor *sbp_login_find_by_id(
- struct sbp_tpg *tpg, int login_id)
-{
- struct se_session *se_sess;
- struct sbp_session *sess;
- struct sbp_login_descriptor *login, *found = NULL;
-
- spin_lock_bh(&tpg->se_tpg.session_lock);
- list_for_each_entry(se_sess, &tpg->se_tpg.tpg_sess_list, sess_list) {
- sess = se_sess->fabric_sess_ptr;
-
- spin_lock_bh(&sess->lock);
- list_for_each_entry(login, &sess->login_list, link) {
- if (login->login_id == login_id)
- found = login;
- }
- spin_unlock_bh(&sess->lock);
- }
- spin_unlock_bh(&tpg->se_tpg.session_lock);
-
- return found;
-}
-
-static u32 sbp_get_lun_from_tpg(struct sbp_tpg *tpg, u32 login_lun, int *err)
-{
- struct se_portal_group *se_tpg = &tpg->se_tpg;
- struct se_lun *se_lun;
-
- rcu_read_lock();
- hlist_for_each_entry_rcu(se_lun, &se_tpg->tpg_lun_hlist, link) {
- if (se_lun->unpacked_lun == login_lun) {
- rcu_read_unlock();
- *err = 0;
- return login_lun;
- }
- }
- rcu_read_unlock();
-
- *err = -ENODEV;
- return login_lun;
-}
-
-static struct sbp_session *sbp_session_create(
- struct sbp_tpg *tpg,
- u64 guid)
-{
- struct sbp_session *sess;
- int ret;
- char guid_str[17];
-
- snprintf(guid_str, sizeof(guid_str), "%016llx", guid);
-
- sess = kmalloc(sizeof(*sess), GFP_KERNEL);
- if (!sess)
- return ERR_PTR(-ENOMEM);
-
- spin_lock_init(&sess->lock);
- INIT_LIST_HEAD(&sess->login_list);
- INIT_DELAYED_WORK(&sess->maint_work, session_maintenance_work);
- sess->guid = guid;
-
- sess->se_sess = target_setup_session(&tpg->se_tpg, 128,
- sizeof(struct sbp_target_request),
- TARGET_PROT_NORMAL, guid_str,
- sess, NULL);
- if (IS_ERR(sess->se_sess)) {
- pr_err("failed to init se_session\n");
- ret = PTR_ERR(sess->se_sess);
- kfree(sess);
- return ERR_PTR(ret);
- }
-
- return sess;
-}
-
-static void sbp_session_release(struct sbp_session *sess, bool cancel_work)
-{
- spin_lock_bh(&sess->lock);
- if (!list_empty(&sess->login_list)) {
- spin_unlock_bh(&sess->lock);
- return;
- }
- spin_unlock_bh(&sess->lock);
-
- if (cancel_work)
- cancel_delayed_work_sync(&sess->maint_work);
-
- target_remove_session(sess->se_sess);
-
- if (sess->card)
- fw_card_put(sess->card);
-
- kfree(sess);
-}
-
-static void sbp_target_agent_unregister(struct sbp_target_agent *);
-
-static void sbp_login_release(struct sbp_login_descriptor *login,
- bool cancel_work)
-{
- struct sbp_session *sess = login->sess;
-
- /* FIXME: abort/wait on tasks */
-
- sbp_target_agent_unregister(login->tgt_agt);
-
- if (sess) {
- spin_lock_bh(&sess->lock);
- list_del(&login->link);
- spin_unlock_bh(&sess->lock);
-
- sbp_session_release(sess, cancel_work);
- }
-
- kfree(login);
-}
-
-static struct sbp_target_agent *sbp_target_agent_register(
- struct sbp_login_descriptor *);
-
-static void sbp_management_request_login(
- struct sbp_management_agent *agent, struct sbp_management_request *req,
- int *status_data_size)
-{
- struct sbp_tport *tport = agent->tport;
- struct sbp_tpg *tpg = tport->tpg;
- struct sbp_session *sess;
- struct sbp_login_descriptor *login;
- struct sbp_login_response_block *response;
- u64 guid;
- u32 unpacked_lun;
- int login_response_len, ret;
-
- unpacked_lun = sbp_get_lun_from_tpg(tpg,
- LOGIN_ORB_LUN(be32_to_cpu(req->orb.misc)), &ret);
- if (ret) {
- pr_notice("login to unknown LUN: %d\n",
- LOGIN_ORB_LUN(be32_to_cpu(req->orb.misc)));
-
- req->status.status = cpu_to_be32(
- STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) |
- STATUS_BLOCK_SBP_STATUS(SBP_STATUS_LUN_NOTSUPP));
- return;
- }
-
- ret = read_peer_guid(&guid, req);
- if (ret != RCODE_COMPLETE) {
- pr_warn("failed to read peer GUID: %d\n", ret);
-
- req->status.status = cpu_to_be32(
- STATUS_BLOCK_RESP(STATUS_RESP_TRANSPORT_FAILURE) |
- STATUS_BLOCK_SBP_STATUS(SBP_STATUS_UNSPECIFIED_ERROR));
- return;
- }
-
- pr_notice("mgt_agent LOGIN to LUN %d from %016llx\n",
- unpacked_lun, guid);
-
- sess = sbp_session_find_by_guid(tpg, guid);
- if (sess) {
- login = sbp_login_find_by_lun(sess, unpacked_lun);
- if (login) {
- pr_notice("initiator already logged-in\n");
-
- /*
- * SBP-2 R4 says we should return access denied, but
- * that can confuse initiators. Instead we need to
- * treat this like a reconnect, but send the login
- * response block like a fresh login.
- *
- * This is required particularly in the case of Apple
- * devices booting off the FireWire target, where
- * the firmware has an active login to the target. When
- * the OS takes control of the session it issues its own
- * LOGIN rather than a RECONNECT. To avoid the machine
- * waiting until the reconnect_hold expires, we can skip
- * the ACCESS_DENIED errors to speed things up.
- */
-
- goto already_logged_in;
- }
- }
-
- /*
- * check exclusive bit in login request
- * reject with access_denied if any logins present
- */
- if (LOGIN_ORB_EXCLUSIVE(be32_to_cpu(req->orb.misc)) &&
- sbp_login_count_all_by_lun(tpg, unpacked_lun, 0)) {
- pr_warn("refusing exclusive login with other active logins\n");
-
- req->status.status = cpu_to_be32(
- STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) |
- STATUS_BLOCK_SBP_STATUS(SBP_STATUS_ACCESS_DENIED));
- return;
- }
-
- /*
- * check exclusive bit in any existing login descriptor
- * reject with access_denied if any exclusive logins present
- */
- if (sbp_login_count_all_by_lun(tpg, unpacked_lun, 1)) {
- pr_warn("refusing login while another exclusive login present\n");
-
- req->status.status = cpu_to_be32(
- STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) |
- STATUS_BLOCK_SBP_STATUS(SBP_STATUS_ACCESS_DENIED));
- return;
- }
-
- /*
- * check we haven't exceeded the number of allowed logins
- * reject with resources_unavailable if we have
- */
- if (sbp_login_count_all_by_lun(tpg, unpacked_lun, 0) >=
- tport->max_logins_per_lun) {
- pr_warn("max number of logins reached\n");
-
- req->status.status = cpu_to_be32(
- STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) |
- STATUS_BLOCK_SBP_STATUS(SBP_STATUS_RESOURCES_UNAVAIL));
- return;
- }
-
- if (!sess) {
- sess = sbp_session_create(tpg, guid);
- if (IS_ERR(sess)) {
- switch (PTR_ERR(sess)) {
- case -EPERM:
- ret = SBP_STATUS_ACCESS_DENIED;
- break;
- default:
- ret = SBP_STATUS_RESOURCES_UNAVAIL;
- break;
- }
-
- req->status.status = cpu_to_be32(
- STATUS_BLOCK_RESP(
- STATUS_RESP_REQUEST_COMPLETE) |
- STATUS_BLOCK_SBP_STATUS(ret));
- return;
- }
-
- sess->node_id = req->node_addr;
- sess->card = fw_card_get(req->card);
- sess->generation = req->generation;
- sess->speed = req->speed;
-
- schedule_delayed_work(&sess->maint_work,
- SESSION_MAINTENANCE_INTERVAL);
- }
-
- /* only take the latest reconnect_hold into account */
- sess->reconnect_hold = min(
- 1 << LOGIN_ORB_RECONNECT(be32_to_cpu(req->orb.misc)),
- tport->max_reconnect_timeout) - 1;
-
- login = kmalloc(sizeof(*login), GFP_KERNEL);
- if (!login) {
- pr_err("failed to allocate login descriptor\n");
-
- sbp_session_release(sess, true);
-
- req->status.status = cpu_to_be32(
- STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) |
- STATUS_BLOCK_SBP_STATUS(SBP_STATUS_RESOURCES_UNAVAIL));
- return;
- }
-
- login->sess = sess;
- login->login_lun = unpacked_lun;
- login->status_fifo_addr = sbp2_pointer_to_addr(&req->orb.status_fifo);
- login->exclusive = LOGIN_ORB_EXCLUSIVE(be32_to_cpu(req->orb.misc));
- login->login_id = atomic_inc_return(&login_id);
-
- login->tgt_agt = sbp_target_agent_register(login);
- if (IS_ERR(login->tgt_agt)) {
- ret = PTR_ERR(login->tgt_agt);
- pr_err("failed to map command block handler: %d\n", ret);
-
- sbp_session_release(sess, true);
- kfree(login);
-
- req->status.status = cpu_to_be32(
- STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) |
- STATUS_BLOCK_SBP_STATUS(SBP_STATUS_RESOURCES_UNAVAIL));
- return;
- }
-
- spin_lock_bh(&sess->lock);
- list_add_tail(&login->link, &sess->login_list);
- spin_unlock_bh(&sess->lock);
-
-already_logged_in:
- response = kzalloc(sizeof(*response), GFP_KERNEL);
- if (!response) {
- pr_err("failed to allocate login response block\n");
-
- sbp_login_release(login, true);
-
- req->status.status = cpu_to_be32(
- STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) |
- STATUS_BLOCK_SBP_STATUS(SBP_STATUS_RESOURCES_UNAVAIL));
- return;
- }
-
- login_response_len = clamp_val(
- LOGIN_ORB_RESPONSE_LENGTH(be32_to_cpu(req->orb.length)),
- 12, sizeof(*response));
- response->misc = cpu_to_be32(
- ((login_response_len & 0xffff) << 16) |
- (login->login_id & 0xffff));
- response->reconnect_hold = cpu_to_be32(sess->reconnect_hold & 0xffff);
- addr_to_sbp2_pointer(login->tgt_agt->handler.offset,
- &response->command_block_agent);
-
- ret = sbp_run_transaction(sess->card, TCODE_WRITE_BLOCK_REQUEST,
- sess->node_id, sess->generation, sess->speed,
- sbp2_pointer_to_addr(&req->orb.ptr2), response,
- login_response_len);
- if (ret != RCODE_COMPLETE) {
- pr_debug("failed to write login response block: %x\n", ret);
-
- kfree(response);
- sbp_login_release(login, true);
-
- req->status.status = cpu_to_be32(
- STATUS_BLOCK_RESP(STATUS_RESP_TRANSPORT_FAILURE) |
- STATUS_BLOCK_SBP_STATUS(SBP_STATUS_UNSPECIFIED_ERROR));
- return;
- }
-
- kfree(response);
-
- req->status.status = cpu_to_be32(
- STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) |
- STATUS_BLOCK_SBP_STATUS(SBP_STATUS_OK));
-}
-
-static void sbp_management_request_query_logins(
- struct sbp_management_agent *agent, struct sbp_management_request *req,
- int *status_data_size)
-{
- pr_notice("QUERY LOGINS not implemented\n");
- /* FIXME: implement */
-
- req->status.status = cpu_to_be32(
- STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) |
- STATUS_BLOCK_SBP_STATUS(SBP_STATUS_REQ_TYPE_NOTSUPP));
-}
-
-static void sbp_management_request_reconnect(
- struct sbp_management_agent *agent, struct sbp_management_request *req,
- int *status_data_size)
-{
- struct sbp_tport *tport = agent->tport;
- struct sbp_tpg *tpg = tport->tpg;
- int ret;
- u64 guid;
- struct sbp_login_descriptor *login;
-
- ret = read_peer_guid(&guid, req);
- if (ret != RCODE_COMPLETE) {
- pr_warn("failed to read peer GUID: %d\n", ret);
-
- req->status.status = cpu_to_be32(
- STATUS_BLOCK_RESP(STATUS_RESP_TRANSPORT_FAILURE) |
- STATUS_BLOCK_SBP_STATUS(SBP_STATUS_UNSPECIFIED_ERROR));
- return;
- }
-
- pr_notice("mgt_agent RECONNECT from %016llx\n", guid);
-
- login = sbp_login_find_by_id(tpg,
- RECONNECT_ORB_LOGIN_ID(be32_to_cpu(req->orb.misc)));
-
- if (!login) {
- pr_err("mgt_agent RECONNECT unknown login ID\n");
-
- req->status.status = cpu_to_be32(
- STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) |
- STATUS_BLOCK_SBP_STATUS(SBP_STATUS_ACCESS_DENIED));
- return;
- }
-
- if (login->sess->guid != guid) {
- pr_err("mgt_agent RECONNECT login GUID doesn't match\n");
-
- req->status.status = cpu_to_be32(
- STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) |
- STATUS_BLOCK_SBP_STATUS(SBP_STATUS_ACCESS_DENIED));
- return;
- }
-
- spin_lock_bh(&login->sess->lock);
- if (login->sess->card)
- fw_card_put(login->sess->card);
-
- /* update the node details */
- login->sess->generation = req->generation;
- login->sess->node_id = req->node_addr;
- login->sess->card = fw_card_get(req->card);
- login->sess->speed = req->speed;
- spin_unlock_bh(&login->sess->lock);
-
- req->status.status = cpu_to_be32(
- STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) |
- STATUS_BLOCK_SBP_STATUS(SBP_STATUS_OK));
-}
-
-static void sbp_management_request_logout(
- struct sbp_management_agent *agent, struct sbp_management_request *req,
- int *status_data_size)
-{
- struct sbp_tport *tport = agent->tport;
- struct sbp_tpg *tpg = tport->tpg;
- int id;
- struct sbp_login_descriptor *login;
-
- id = LOGOUT_ORB_LOGIN_ID(be32_to_cpu(req->orb.misc));
-
- login = sbp_login_find_by_id(tpg, id);
- if (!login) {
- pr_warn("cannot find login: %d\n", id);
-
- req->status.status = cpu_to_be32(
- STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) |
- STATUS_BLOCK_SBP_STATUS(SBP_STATUS_LOGIN_ID_UNKNOWN));
- return;
- }
-
- pr_info("mgt_agent LOGOUT from LUN %d session %d\n",
- login->login_lun, login->login_id);
-
- if (req->node_addr != login->sess->node_id) {
- pr_warn("logout from different node ID\n");
-
- req->status.status = cpu_to_be32(
- STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) |
- STATUS_BLOCK_SBP_STATUS(SBP_STATUS_ACCESS_DENIED));
- return;
- }
-
- sbp_login_release(login, true);
-
- req->status.status = cpu_to_be32(
- STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) |
- STATUS_BLOCK_SBP_STATUS(SBP_STATUS_OK));
-}
-
-static void session_check_for_reset(struct sbp_session *sess)
-{
- bool card_valid = false;
-
- spin_lock_bh(&sess->lock);
-
- if (sess->card) {
- spin_lock_irq(&sess->card->lock);
- card_valid = (sess->card->local_node != NULL);
- spin_unlock_irq(&sess->card->lock);
-
- if (!card_valid) {
- fw_card_put(sess->card);
- sess->card = NULL;
- }
- }
-
- if (!card_valid || (sess->generation != sess->card->generation)) {
- pr_info("Waiting for reconnect from node: %016llx\n",
- sess->guid);
-
- sess->node_id = -1;
- sess->reconnect_expires = get_jiffies_64() +
- ((sess->reconnect_hold + 1) * HZ);
- }
-
- spin_unlock_bh(&sess->lock);
-}
-
-static void session_reconnect_expired(struct sbp_session *sess)
-{
- struct sbp_login_descriptor *login, *temp;
- LIST_HEAD(login_list);
-
- pr_info("Reconnect timer expired for node: %016llx\n", sess->guid);
-
- spin_lock_bh(&sess->lock);
- list_for_each_entry_safe(login, temp, &sess->login_list, link) {
- login->sess = NULL;
- list_move_tail(&login->link, &login_list);
- }
- spin_unlock_bh(&sess->lock);
-
- list_for_each_entry_safe(login, temp, &login_list, link) {
- list_del(&login->link);
- sbp_login_release(login, false);
- }
-
- sbp_session_release(sess, false);
-}
-
-static void session_maintenance_work(struct work_struct *work)
-{
- struct sbp_session *sess = container_of(work, struct sbp_session,
- maint_work.work);
-
- /* could be called while tearing down the session */
- spin_lock_bh(&sess->lock);
- if (list_empty(&sess->login_list)) {
- spin_unlock_bh(&sess->lock);
- return;
- }
- spin_unlock_bh(&sess->lock);
-
- if (sess->node_id != -1) {
- /* check for bus reset and make node_id invalid */
- session_check_for_reset(sess);
-
- schedule_delayed_work(&sess->maint_work,
- SESSION_MAINTENANCE_INTERVAL);
- } else if (!time_after64(get_jiffies_64(), sess->reconnect_expires)) {
- /* still waiting for reconnect */
- schedule_delayed_work(&sess->maint_work,
- SESSION_MAINTENANCE_INTERVAL);
- } else {
- /* reconnect timeout has expired */
- session_reconnect_expired(sess);
- }
-}
-
-static int tgt_agent_rw_agent_state(struct fw_card *card, int tcode, void *data,
- struct sbp_target_agent *agent)
-{
- int state;
-
- switch (tcode) {
- case TCODE_READ_QUADLET_REQUEST:
- pr_debug("tgt_agent AGENT_STATE READ\n");
-
- spin_lock_bh(&agent->lock);
- state = agent->state;
- spin_unlock_bh(&agent->lock);
-
- *(__be32 *)data = cpu_to_be32(state);
-
- return RCODE_COMPLETE;
-
- case TCODE_WRITE_QUADLET_REQUEST:
- /* ignored */
- return RCODE_COMPLETE;
-
- default:
- return RCODE_TYPE_ERROR;
- }
-}
-
-static int tgt_agent_rw_agent_reset(struct fw_card *card, int tcode, void *data,
- struct sbp_target_agent *agent)
-{
- switch (tcode) {
- case TCODE_WRITE_QUADLET_REQUEST:
- pr_debug("tgt_agent AGENT_RESET\n");
- spin_lock_bh(&agent->lock);
- agent->state = AGENT_STATE_RESET;
- spin_unlock_bh(&agent->lock);
- return RCODE_COMPLETE;
-
- default:
- return RCODE_TYPE_ERROR;
- }
-}
-
-static int tgt_agent_rw_orb_pointer(struct fw_card *card, int tcode, void *data,
- struct sbp_target_agent *agent)
-{
- struct sbp2_pointer *ptr = data;
-
- switch (tcode) {
- case TCODE_WRITE_BLOCK_REQUEST:
- spin_lock_bh(&agent->lock);
- if (agent->state != AGENT_STATE_SUSPENDED &&
- agent->state != AGENT_STATE_RESET) {
- spin_unlock_bh(&agent->lock);
- pr_notice("Ignoring ORB_POINTER write while active.\n");
- return RCODE_CONFLICT_ERROR;
- }
- agent->state = AGENT_STATE_ACTIVE;
- spin_unlock_bh(&agent->lock);
-
- agent->orb_pointer = sbp2_pointer_to_addr(ptr);
- agent->doorbell = false;
-
- pr_debug("tgt_agent ORB_POINTER write: 0x%llx\n",
- agent->orb_pointer);
-
- queue_work(system_unbound_wq, &agent->work);
-
- return RCODE_COMPLETE;
-
- case TCODE_READ_BLOCK_REQUEST:
- pr_debug("tgt_agent ORB_POINTER READ\n");
- spin_lock_bh(&agent->lock);
- addr_to_sbp2_pointer(agent->orb_pointer, ptr);
- spin_unlock_bh(&agent->lock);
- return RCODE_COMPLETE;
-
- default:
- return RCODE_TYPE_ERROR;
- }
-}
-
-static int tgt_agent_rw_doorbell(struct fw_card *card, int tcode, void *data,
- struct sbp_target_agent *agent)
-{
- switch (tcode) {
- case TCODE_WRITE_QUADLET_REQUEST:
- spin_lock_bh(&agent->lock);
- if (agent->state != AGENT_STATE_SUSPENDED) {
- spin_unlock_bh(&agent->lock);
- pr_debug("Ignoring DOORBELL while active.\n");
- return RCODE_CONFLICT_ERROR;
- }
- agent->state = AGENT_STATE_ACTIVE;
- spin_unlock_bh(&agent->lock);
-
- agent->doorbell = true;
-
- pr_debug("tgt_agent DOORBELL\n");
-
- queue_work(system_unbound_wq, &agent->work);
-
- return RCODE_COMPLETE;
-
- case TCODE_READ_QUADLET_REQUEST:
- return RCODE_COMPLETE;
-
- default:
- return RCODE_TYPE_ERROR;
- }
-}
-
-static int tgt_agent_rw_unsolicited_status_enable(struct fw_card *card,
- int tcode, void *data, struct sbp_target_agent *agent)
-{
- switch (tcode) {
- case TCODE_WRITE_QUADLET_REQUEST:
- pr_debug("tgt_agent UNSOLICITED_STATUS_ENABLE\n");
- /* ignored as we don't send unsolicited status */
- return RCODE_COMPLETE;
-
- case TCODE_READ_QUADLET_REQUEST:
- return RCODE_COMPLETE;
-
- default:
- return RCODE_TYPE_ERROR;
- }
-}
-
-static void tgt_agent_rw(struct fw_card *card, struct fw_request *request,
- int tcode, int destination, int source, int generation,
- unsigned long long offset, void *data, size_t length,
- void *callback_data)
-{
- struct sbp_target_agent *agent = callback_data;
- struct sbp_session *sess = agent->login->sess;
- int sess_gen, sess_node, rcode;
-
- spin_lock_bh(&sess->lock);
- sess_gen = sess->generation;
- sess_node = sess->node_id;
- spin_unlock_bh(&sess->lock);
-
- if (generation != sess_gen) {
- pr_notice("ignoring request with wrong generation\n");
- rcode = RCODE_TYPE_ERROR;
- goto out;
- }
-
- if (source != sess_node) {
- pr_notice("ignoring request from foreign node (%x != %x)\n",
- source, sess_node);
- rcode = RCODE_TYPE_ERROR;
- goto out;
- }
-
- /* turn offset into the offset from the start of the block */
- offset -= agent->handler.offset;
-
- if (offset == 0x00 && length == 4) {
- /* AGENT_STATE */
- rcode = tgt_agent_rw_agent_state(card, tcode, data, agent);
- } else if (offset == 0x04 && length == 4) {
- /* AGENT_RESET */
- rcode = tgt_agent_rw_agent_reset(card, tcode, data, agent);
- } else if (offset == 0x08 && length == 8) {
- /* ORB_POINTER */
- rcode = tgt_agent_rw_orb_pointer(card, tcode, data, agent);
- } else if (offset == 0x10 && length == 4) {
- /* DOORBELL */
- rcode = tgt_agent_rw_doorbell(card, tcode, data, agent);
- } else if (offset == 0x14 && length == 4) {
- /* UNSOLICITED_STATUS_ENABLE */
- rcode = tgt_agent_rw_unsolicited_status_enable(card, tcode,
- data, agent);
- } else {
- rcode = RCODE_ADDRESS_ERROR;
- }
-
-out:
- fw_send_response(card, request, rcode);
-}
-
-static void sbp_handle_command(struct sbp_target_request *);
-static int sbp_send_status(struct sbp_target_request *);
-static void sbp_free_request(struct sbp_target_request *);
-
-static void tgt_agent_process_work(struct work_struct *work)
-{
- struct sbp_target_request *req =
- container_of(work, struct sbp_target_request, work);
-
- pr_debug("tgt_orb ptr:0x%llx next_ORB:0x%llx data_descriptor:0x%llx misc:0x%x\n",
- req->orb_pointer,
- sbp2_pointer_to_addr(&req->orb.next_orb),
- sbp2_pointer_to_addr(&req->orb.data_descriptor),
- be32_to_cpu(req->orb.misc));
-
- if (req->orb_pointer >> 32)
- pr_debug("ORB with high bits set\n");
-
- switch (ORB_REQUEST_FORMAT(be32_to_cpu(req->orb.misc))) {
- case 0:/* Format specified by this standard */
- sbp_handle_command(req);
- return;
- case 1: /* Reserved for future standardization */
- case 2: /* Vendor-dependent */
- req->status.status |= cpu_to_be32(
- STATUS_BLOCK_RESP(
- STATUS_RESP_REQUEST_COMPLETE) |
- STATUS_BLOCK_DEAD(0) |
- STATUS_BLOCK_LEN(1) |
- STATUS_BLOCK_SBP_STATUS(
- SBP_STATUS_REQ_TYPE_NOTSUPP));
- sbp_send_status(req);
- return;
- case 3: /* Dummy ORB */
- req->status.status |= cpu_to_be32(
- STATUS_BLOCK_RESP(
- STATUS_RESP_REQUEST_COMPLETE) |
- STATUS_BLOCK_DEAD(0) |
- STATUS_BLOCK_LEN(1) |
- STATUS_BLOCK_SBP_STATUS(
- SBP_STATUS_DUMMY_ORB_COMPLETE));
- sbp_send_status(req);
- return;
- default:
- BUG();
- }
-}
-
-/* used to double-check we haven't been issued an AGENT_RESET */
-static inline bool tgt_agent_check_active(struct sbp_target_agent *agent)
-{
- bool active;
-
- spin_lock_bh(&agent->lock);
- active = (agent->state == AGENT_STATE_ACTIVE);
- spin_unlock_bh(&agent->lock);
-
- return active;
-}
-
-static struct sbp_target_request *sbp_mgt_get_req(struct sbp_session *sess,
- struct fw_card *card, u64 next_orb)
-{
- struct se_session *se_sess = sess->se_sess;
- struct sbp_target_request *req;
- int tag, cpu;
-
- tag = sbitmap_queue_get(&se_sess->sess_tag_pool, &cpu);
- if (tag < 0)
- return ERR_PTR(-ENOMEM);
-
- req = &((struct sbp_target_request *)se_sess->sess_cmd_map)[tag];
- memset(req, 0, sizeof(*req));
- req->se_cmd.map_tag = tag;
- req->se_cmd.map_cpu = cpu;
- req->se_cmd.tag = next_orb;
-
- return req;
-}
-
-static void tgt_agent_fetch_work(struct work_struct *work)
-{
- struct sbp_target_agent *agent =
- container_of(work, struct sbp_target_agent, work);
- struct sbp_session *sess = agent->login->sess;
- struct sbp_target_request *req;
- int ret;
- bool doorbell = agent->doorbell;
- u64 next_orb = agent->orb_pointer;
-
- while (next_orb && tgt_agent_check_active(agent)) {
- req = sbp_mgt_get_req(sess, sess->card, next_orb);
- if (IS_ERR(req)) {
- spin_lock_bh(&agent->lock);
- agent->state = AGENT_STATE_DEAD;
- spin_unlock_bh(&agent->lock);
- return;
- }
-
- req->login = agent->login;
- req->orb_pointer = next_orb;
-
- req->status.status = cpu_to_be32(STATUS_BLOCK_ORB_OFFSET_HIGH(
- req->orb_pointer >> 32));
- req->status.orb_low = cpu_to_be32(
- req->orb_pointer & 0xfffffffc);
-
- /* read in the ORB */
- ret = sbp_run_transaction(sess->card, TCODE_READ_BLOCK_REQUEST,
- sess->node_id, sess->generation, sess->speed,
- req->orb_pointer, &req->orb, sizeof(req->orb));
- if (ret != RCODE_COMPLETE) {
- pr_debug("tgt_orb fetch failed: %x\n", ret);
- req->status.status |= cpu_to_be32(
- STATUS_BLOCK_SRC(
- STATUS_SRC_ORB_FINISHED) |
- STATUS_BLOCK_RESP(
- STATUS_RESP_TRANSPORT_FAILURE) |
- STATUS_BLOCK_DEAD(1) |
- STATUS_BLOCK_LEN(1) |
- STATUS_BLOCK_SBP_STATUS(
- SBP_STATUS_UNSPECIFIED_ERROR));
- spin_lock_bh(&agent->lock);
- agent->state = AGENT_STATE_DEAD;
- spin_unlock_bh(&agent->lock);
-
- sbp_send_status(req);
- return;
- }
-
- /* check the next_ORB field */
- if (be32_to_cpu(req->orb.next_orb.high) & 0x80000000) {
- next_orb = 0;
- req->status.status |= cpu_to_be32(STATUS_BLOCK_SRC(
- STATUS_SRC_ORB_FINISHED));
- } else {
- next_orb = sbp2_pointer_to_addr(&req->orb.next_orb);
- req->status.status |= cpu_to_be32(STATUS_BLOCK_SRC(
- STATUS_SRC_ORB_CONTINUING));
- }
-
- if (tgt_agent_check_active(agent) && !doorbell) {
- INIT_WORK(&req->work, tgt_agent_process_work);
- queue_work(system_unbound_wq, &req->work);
- } else {
- /* don't process this request, just check next_ORB */
- sbp_free_request(req);
- }
-
- spin_lock_bh(&agent->lock);
- doorbell = agent->doorbell = false;
-
- /* check if we should carry on processing */
- if (next_orb)
- agent->orb_pointer = next_orb;
- else
- agent->state = AGENT_STATE_SUSPENDED;
-
- spin_unlock_bh(&agent->lock);
- };
-}
-
-static struct sbp_target_agent *sbp_target_agent_register(
- struct sbp_login_descriptor *login)
-{
- struct sbp_target_agent *agent;
- int ret;
-
- agent = kmalloc(sizeof(*agent), GFP_KERNEL);
- if (!agent)
- return ERR_PTR(-ENOMEM);
-
- spin_lock_init(&agent->lock);
-
- agent->handler.length = 0x20;
- agent->handler.address_callback = tgt_agent_rw;
- agent->handler.callback_data = agent;
-
- agent->login = login;
- agent->state = AGENT_STATE_RESET;
- INIT_WORK(&agent->work, tgt_agent_fetch_work);
- agent->orb_pointer = 0;
- agent->doorbell = false;
-
- ret = fw_core_add_address_handler(&agent->handler,
- &sbp_register_region);
- if (ret < 0) {
- kfree(agent);
- return ERR_PTR(ret);
- }
-
- return agent;
-}
-
-static void sbp_target_agent_unregister(struct sbp_target_agent *agent)
-{
- fw_core_remove_address_handler(&agent->handler);
- cancel_work_sync(&agent->work);
- kfree(agent);
-}
-
-/*
- * Simple wrapper around fw_run_transaction that retries the transaction several
- * times in case of failure, with an exponential backoff.
- */
-static int sbp_run_transaction(struct fw_card *card, int tcode, int destination_id,
- int generation, int speed, unsigned long long offset,
- void *payload, size_t length)
-{
- int attempt, ret, delay;
-
- for (attempt = 1; attempt <= 5; attempt++) {
- ret = fw_run_transaction(card, tcode, destination_id,
- generation, speed, offset, payload, length);
-
- switch (ret) {
- case RCODE_COMPLETE:
- case RCODE_TYPE_ERROR:
- case RCODE_ADDRESS_ERROR:
- case RCODE_GENERATION:
- return ret;
-
- default:
- delay = 5 * attempt * attempt;
- usleep_range(delay, delay * 2);
- }
- }
-
- return ret;
-}
-
-/*
- * Wrapper around sbp_run_transaction that gets the card, destination,
- * generation and speed out of the request's session.
- */
-static int sbp_run_request_transaction(struct sbp_target_request *req,
- int tcode, unsigned long long offset, void *payload,
- size_t length)
-{
- struct sbp_login_descriptor *login = req->login;
- struct sbp_session *sess = login->sess;
- struct fw_card *card;
- int node_id, generation, speed, ret;
-
- spin_lock_bh(&sess->lock);
- card = fw_card_get(sess->card);
- node_id = sess->node_id;
- generation = sess->generation;
- speed = sess->speed;
- spin_unlock_bh(&sess->lock);
-
- ret = sbp_run_transaction(card, tcode, node_id, generation, speed,
- offset, payload, length);
-
- fw_card_put(card);
-
- return ret;
-}
-
-static int sbp_fetch_command(struct sbp_target_request *req)
-{
- int ret, cmd_len, copy_len;
-
- cmd_len = scsi_command_size(req->orb.command_block);
-
- req->cmd_buf = kmalloc(cmd_len, GFP_KERNEL);
- if (!req->cmd_buf)
- return -ENOMEM;
-
- memcpy(req->cmd_buf, req->orb.command_block,
- min_t(int, cmd_len, sizeof(req->orb.command_block)));
-
- if (cmd_len > sizeof(req->orb.command_block)) {
- pr_debug("sbp_fetch_command: filling in long command\n");
- copy_len = cmd_len - sizeof(req->orb.command_block);
-
- ret = sbp_run_request_transaction(req,
- TCODE_READ_BLOCK_REQUEST,
- req->orb_pointer + sizeof(req->orb),
- req->cmd_buf + sizeof(req->orb.command_block),
- copy_len);
- if (ret != RCODE_COMPLETE)
- return -EIO;
- }
-
- return 0;
-}
-
-static int sbp_fetch_page_table(struct sbp_target_request *req)
-{
- int pg_tbl_sz, ret;
- struct sbp_page_table_entry *pg_tbl;
-
- if (!CMDBLK_ORB_PG_TBL_PRESENT(be32_to_cpu(req->orb.misc)))
- return 0;
-
- pg_tbl_sz = CMDBLK_ORB_DATA_SIZE(be32_to_cpu(req->orb.misc)) *
- sizeof(struct sbp_page_table_entry);
-
- pg_tbl = kmalloc(pg_tbl_sz, GFP_KERNEL);
- if (!pg_tbl)
- return -ENOMEM;
-
- ret = sbp_run_request_transaction(req, TCODE_READ_BLOCK_REQUEST,
- sbp2_pointer_to_addr(&req->orb.data_descriptor),
- pg_tbl, pg_tbl_sz);
- if (ret != RCODE_COMPLETE) {
- kfree(pg_tbl);
- return -EIO;
- }
-
- req->pg_tbl = pg_tbl;
- return 0;
-}
-
-static void sbp_calc_data_length_direction(struct sbp_target_request *req,
- u32 *data_len, enum dma_data_direction *data_dir)
-{
- int data_size, direction, idx;
-
- data_size = CMDBLK_ORB_DATA_SIZE(be32_to_cpu(req->orb.misc));
- direction = CMDBLK_ORB_DIRECTION(be32_to_cpu(req->orb.misc));
-
- if (!data_size) {
- *data_len = 0;
- *data_dir = DMA_NONE;
- return;
- }
-
- *data_dir = direction ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
-
- if (req->pg_tbl) {
- *data_len = 0;
- for (idx = 0; idx < data_size; idx++) {
- *data_len += be16_to_cpu(
- req->pg_tbl[idx].segment_length);
- }
- } else {
- *data_len = data_size;
- }
-}
-
-static void sbp_handle_command(struct sbp_target_request *req)
-{
- struct sbp_login_descriptor *login = req->login;
- struct sbp_session *sess = login->sess;
- int ret, unpacked_lun;
- u32 data_length;
- enum dma_data_direction data_dir;
-
- ret = sbp_fetch_command(req);
- if (ret) {
- pr_debug("sbp_handle_command: fetch command failed: %d\n", ret);
- goto err;
- }
-
- ret = sbp_fetch_page_table(req);
- if (ret) {
- pr_debug("sbp_handle_command: fetch page table failed: %d\n",
- ret);
- goto err;
- }
-
- unpacked_lun = req->login->login_lun;
- sbp_calc_data_length_direction(req, &data_length, &data_dir);
-
- pr_debug("sbp_handle_command ORB:0x%llx unpacked_lun:%d data_len:%d data_dir:%d\n",
- req->orb_pointer, unpacked_lun, data_length, data_dir);
-
- /* only used for printk until we do TMRs */
- req->se_cmd.tag = req->orb_pointer;
- if (target_submit_cmd(&req->se_cmd, sess->se_sess, req->cmd_buf,
- req->sense_buf, unpacked_lun, data_length,
- TCM_SIMPLE_TAG, data_dir, TARGET_SCF_ACK_KREF))
- goto err;
-
- return;
-
-err:
- req->status.status |= cpu_to_be32(
- STATUS_BLOCK_RESP(STATUS_RESP_TRANSPORT_FAILURE) |
- STATUS_BLOCK_DEAD(0) |
- STATUS_BLOCK_LEN(1) |
- STATUS_BLOCK_SBP_STATUS(SBP_STATUS_UNSPECIFIED_ERROR));
- sbp_send_status(req);
-}
-
-/*
- * DMA_TO_DEVICE = read from initiator (SCSI WRITE)
- * DMA_FROM_DEVICE = write to initiator (SCSI READ)
- */
-static int sbp_rw_data(struct sbp_target_request *req)
-{
- struct sbp_session *sess = req->login->sess;
- int tcode, sg_miter_flags, max_payload, pg_size, speed, node_id,
- generation, num_pte, length, tfr_length,
- rcode = RCODE_COMPLETE;
- struct sbp_page_table_entry *pte;
- unsigned long long offset;
- struct fw_card *card;
- struct sg_mapping_iter iter;
-
- if (req->se_cmd.data_direction == DMA_FROM_DEVICE) {
- tcode = TCODE_WRITE_BLOCK_REQUEST;
- sg_miter_flags = SG_MITER_FROM_SG;
- } else {
- tcode = TCODE_READ_BLOCK_REQUEST;
- sg_miter_flags = SG_MITER_TO_SG;
- }
-
- max_payload = 4 << CMDBLK_ORB_MAX_PAYLOAD(be32_to_cpu(req->orb.misc));
- speed = CMDBLK_ORB_SPEED(be32_to_cpu(req->orb.misc));
-
- pg_size = CMDBLK_ORB_PG_SIZE(be32_to_cpu(req->orb.misc));
- if (pg_size) {
- pr_err("sbp_run_transaction: page size ignored\n");
- pg_size = 0x100 << pg_size;
- }
-
- spin_lock_bh(&sess->lock);
- card = fw_card_get(sess->card);
- node_id = sess->node_id;
- generation = sess->generation;
- spin_unlock_bh(&sess->lock);
-
- if (req->pg_tbl) {
- pte = req->pg_tbl;
- num_pte = CMDBLK_ORB_DATA_SIZE(be32_to_cpu(req->orb.misc));
-
- offset = 0;
- length = 0;
- } else {
- pte = NULL;
- num_pte = 0;
-
- offset = sbp2_pointer_to_addr(&req->orb.data_descriptor);
- length = req->se_cmd.data_length;
- }
-
- sg_miter_start(&iter, req->se_cmd.t_data_sg, req->se_cmd.t_data_nents,
- sg_miter_flags);
-
- while (length || num_pte) {
- if (!length) {
- offset = (u64)be16_to_cpu(pte->segment_base_hi) << 32 |
- be32_to_cpu(pte->segment_base_lo);
- length = be16_to_cpu(pte->segment_length);
-
- pte++;
- num_pte--;
- }
-
- sg_miter_next(&iter);
-
- tfr_length = min3(length, max_payload, (int)iter.length);
-
- /* FIXME: take page_size into account */
-
- rcode = sbp_run_transaction(card, tcode, node_id,
- generation, speed,
- offset, iter.addr, tfr_length);
-
- if (rcode != RCODE_COMPLETE)
- break;
-
- length -= tfr_length;
- offset += tfr_length;
- iter.consumed = tfr_length;
- }
-
- sg_miter_stop(&iter);
- fw_card_put(card);
-
- if (rcode == RCODE_COMPLETE) {
- WARN_ON(length != 0);
- return 0;
- } else {
- return -EIO;
- }
-}
-
-static int sbp_send_status(struct sbp_target_request *req)
-{
- int rc, ret = 0, length;
- struct sbp_login_descriptor *login = req->login;
-
- length = (((be32_to_cpu(req->status.status) >> 24) & 0x07) + 1) * 4;
-
- rc = sbp_run_request_transaction(req, TCODE_WRITE_BLOCK_REQUEST,
- login->status_fifo_addr, &req->status, length);
- if (rc != RCODE_COMPLETE) {
- pr_debug("sbp_send_status: write failed: 0x%x\n", rc);
- ret = -EIO;
- goto put_ref;
- }
-
- pr_debug("sbp_send_status: status write complete for ORB: 0x%llx\n",
- req->orb_pointer);
- /*
- * Drop the extra ACK_KREF reference taken by target_submit_cmd()
- * ahead of sbp_check_stop_free() -> transport_generic_free_cmd()
- * final se_cmd->cmd_kref put.
- */
-put_ref:
- target_put_sess_cmd(&req->se_cmd);
- return ret;
-}
-
-static void sbp_sense_mangle(struct sbp_target_request *req)
-{
- struct se_cmd *se_cmd = &req->se_cmd;
- u8 *sense = req->sense_buf;
- u8 *status = req->status.data;
-
- WARN_ON(se_cmd->scsi_sense_length < 18);
-
- switch (sense[0] & 0x7f) { /* sfmt */
- case 0x70: /* current, fixed */
- status[0] = 0 << 6;
- break;
- case 0x71: /* deferred, fixed */
- status[0] = 1 << 6;
- break;
- case 0x72: /* current, descriptor */
- case 0x73: /* deferred, descriptor */
- default:
- /*
- * TODO: SBP-3 specifies what we should do with descriptor
- * format sense data
- */
- pr_err("sbp_send_sense: unknown sense format: 0x%x\n",
- sense[0]);
- req->status.status |= cpu_to_be32(
- STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) |
- STATUS_BLOCK_DEAD(0) |
- STATUS_BLOCK_LEN(1) |
- STATUS_BLOCK_SBP_STATUS(SBP_STATUS_REQUEST_ABORTED));
- return;
- }
-
- status[0] |= se_cmd->scsi_status & 0x3f;/* status */
- status[1] =
- (sense[0] & 0x80) | /* valid */
- ((sense[2] & 0xe0) >> 1) | /* mark, eom, ili */
- (sense[2] & 0x0f); /* sense_key */
- status[2] = se_cmd->scsi_asc; /* sense_code */
- status[3] = se_cmd->scsi_ascq; /* sense_qualifier */
-
- /* information */
- status[4] = sense[3];
- status[5] = sense[4];
- status[6] = sense[5];
- status[7] = sense[6];
-
- /* CDB-dependent */
- status[8] = sense[8];
- status[9] = sense[9];
- status[10] = sense[10];
- status[11] = sense[11];
-
- /* fru */
- status[12] = sense[14];
-
- /* sense_key-dependent */
- status[13] = sense[15];
- status[14] = sense[16];
- status[15] = sense[17];
-
- req->status.status |= cpu_to_be32(
- STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) |
- STATUS_BLOCK_DEAD(0) |
- STATUS_BLOCK_LEN(5) |
- STATUS_BLOCK_SBP_STATUS(SBP_STATUS_OK));
-}
-
-static int sbp_send_sense(struct sbp_target_request *req)
-{
- struct se_cmd *se_cmd = &req->se_cmd;
-
- if (se_cmd->scsi_sense_length) {
- sbp_sense_mangle(req);
- } else {
- req->status.status |= cpu_to_be32(
- STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) |
- STATUS_BLOCK_DEAD(0) |
- STATUS_BLOCK_LEN(1) |
- STATUS_BLOCK_SBP_STATUS(SBP_STATUS_OK));
- }
-
- return sbp_send_status(req);
-}
-
-static void sbp_free_request(struct sbp_target_request *req)
-{
- struct se_cmd *se_cmd = &req->se_cmd;
- struct se_session *se_sess = se_cmd->se_sess;
-
- kfree(req->pg_tbl);
- kfree(req->cmd_buf);
-
- target_free_tag(se_sess, se_cmd);
-}
-
-static void sbp_mgt_agent_process(struct work_struct *work)
-{
- struct sbp_management_agent *agent =
- container_of(work, struct sbp_management_agent, work);
- struct sbp_management_request *req = agent->request;
- int ret;
- int status_data_len = 0;
-
- /* fetch the ORB from the initiator */
- ret = sbp_run_transaction(req->card, TCODE_READ_BLOCK_REQUEST,
- req->node_addr, req->generation, req->speed,
- agent->orb_offset, &req->orb, sizeof(req->orb));
- if (ret != RCODE_COMPLETE) {
- pr_debug("mgt_orb fetch failed: %x\n", ret);
- goto out;
- }
-
- pr_debug("mgt_orb ptr1:0x%llx ptr2:0x%llx misc:0x%x len:0x%x status_fifo:0x%llx\n",
- sbp2_pointer_to_addr(&req->orb.ptr1),
- sbp2_pointer_to_addr(&req->orb.ptr2),
- be32_to_cpu(req->orb.misc), be32_to_cpu(req->orb.length),
- sbp2_pointer_to_addr(&req->orb.status_fifo));
-
- if (!ORB_NOTIFY(be32_to_cpu(req->orb.misc)) ||
- ORB_REQUEST_FORMAT(be32_to_cpu(req->orb.misc)) != 0) {
- pr_err("mgt_orb bad request\n");
- goto out;
- }
-
- switch (MANAGEMENT_ORB_FUNCTION(be32_to_cpu(req->orb.misc))) {
- case MANAGEMENT_ORB_FUNCTION_LOGIN:
- sbp_management_request_login(agent, req, &status_data_len);
- break;
-
- case MANAGEMENT_ORB_FUNCTION_QUERY_LOGINS:
- sbp_management_request_query_logins(agent, req,
- &status_data_len);
- break;
-
- case MANAGEMENT_ORB_FUNCTION_RECONNECT:
- sbp_management_request_reconnect(agent, req, &status_data_len);
- break;
-
- case MANAGEMENT_ORB_FUNCTION_SET_PASSWORD:
- pr_notice("SET PASSWORD not implemented\n");
-
- req->status.status = cpu_to_be32(
- STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) |
- STATUS_BLOCK_SBP_STATUS(SBP_STATUS_REQ_TYPE_NOTSUPP));
-
- break;
-
- case MANAGEMENT_ORB_FUNCTION_LOGOUT:
- sbp_management_request_logout(agent, req, &status_data_len);
- break;
-
- case MANAGEMENT_ORB_FUNCTION_ABORT_TASK:
- pr_notice("ABORT TASK not implemented\n");
-
- req->status.status = cpu_to_be32(
- STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) |
- STATUS_BLOCK_SBP_STATUS(SBP_STATUS_REQ_TYPE_NOTSUPP));
-
- break;
-
- case MANAGEMENT_ORB_FUNCTION_ABORT_TASK_SET:
- pr_notice("ABORT TASK SET not implemented\n");
-
- req->status.status = cpu_to_be32(
- STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) |
- STATUS_BLOCK_SBP_STATUS(SBP_STATUS_REQ_TYPE_NOTSUPP));
-
- break;
-
- case MANAGEMENT_ORB_FUNCTION_LOGICAL_UNIT_RESET:
- pr_notice("LOGICAL UNIT RESET not implemented\n");
-
- req->status.status = cpu_to_be32(
- STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) |
- STATUS_BLOCK_SBP_STATUS(SBP_STATUS_REQ_TYPE_NOTSUPP));
-
- break;
-
- case MANAGEMENT_ORB_FUNCTION_TARGET_RESET:
- pr_notice("TARGET RESET not implemented\n");
-
- req->status.status = cpu_to_be32(
- STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) |
- STATUS_BLOCK_SBP_STATUS(SBP_STATUS_REQ_TYPE_NOTSUPP));
-
- break;
-
- default:
- pr_notice("unknown management function 0x%x\n",
- MANAGEMENT_ORB_FUNCTION(be32_to_cpu(req->orb.misc)));
-
- req->status.status = cpu_to_be32(
- STATUS_BLOCK_RESP(STATUS_RESP_REQUEST_COMPLETE) |
- STATUS_BLOCK_SBP_STATUS(SBP_STATUS_REQ_TYPE_NOTSUPP));
-
- break;
- }
-
- req->status.status |= cpu_to_be32(
- STATUS_BLOCK_SRC(1) | /* Response to ORB, next_ORB absent */
- STATUS_BLOCK_LEN(DIV_ROUND_UP(status_data_len, 4) + 1) |
- STATUS_BLOCK_ORB_OFFSET_HIGH(agent->orb_offset >> 32));
- req->status.orb_low = cpu_to_be32(agent->orb_offset);
-
- /* write the status block back to the initiator */
- ret = sbp_run_transaction(req->card, TCODE_WRITE_BLOCK_REQUEST,
- req->node_addr, req->generation, req->speed,
- sbp2_pointer_to_addr(&req->orb.status_fifo),
- &req->status, 8 + status_data_len);
- if (ret != RCODE_COMPLETE) {
- pr_debug("mgt_orb status write failed: %x\n", ret);
- goto out;
- }
-
-out:
- fw_card_put(req->card);
- kfree(req);
-
- spin_lock_bh(&agent->lock);
- agent->state = MANAGEMENT_AGENT_STATE_IDLE;
- spin_unlock_bh(&agent->lock);
-}
-
-static void sbp_mgt_agent_rw(struct fw_card *card,
- struct fw_request *request, int tcode, int destination, int source,
- int generation, unsigned long long offset, void *data, size_t length,
- void *callback_data)
-{
- struct sbp_management_agent *agent = callback_data;
- struct sbp2_pointer *ptr = data;
- int rcode = RCODE_ADDRESS_ERROR;
-
- if (!agent->tport->enable)
- goto out;
-
- if ((offset != agent->handler.offset) || (length != 8))
- goto out;
-
- if (tcode == TCODE_WRITE_BLOCK_REQUEST) {
- struct sbp_management_request *req;
- int prev_state;
-
- spin_lock_bh(&agent->lock);
- prev_state = agent->state;
- agent->state = MANAGEMENT_AGENT_STATE_BUSY;
- spin_unlock_bh(&agent->lock);
-
- if (prev_state == MANAGEMENT_AGENT_STATE_BUSY) {
- pr_notice("ignoring management request while busy\n");
- rcode = RCODE_CONFLICT_ERROR;
- goto out;
- }
- req = kzalloc(sizeof(*req), GFP_ATOMIC);
- if (!req) {
- rcode = RCODE_CONFLICT_ERROR;
- goto out;
- }
-
- req->card = fw_card_get(card);
- req->generation = generation;
- req->node_addr = source;
- req->speed = fw_get_request_speed(request);
-
- agent->orb_offset = sbp2_pointer_to_addr(ptr);
- agent->request = req;
-
- queue_work(system_unbound_wq, &agent->work);
- rcode = RCODE_COMPLETE;
- } else if (tcode == TCODE_READ_BLOCK_REQUEST) {
- addr_to_sbp2_pointer(agent->orb_offset, ptr);
- rcode = RCODE_COMPLETE;
- } else {
- rcode = RCODE_TYPE_ERROR;
- }
-
-out:
- fw_send_response(card, request, rcode);
-}
-
-static struct sbp_management_agent *sbp_management_agent_register(
- struct sbp_tport *tport)
-{
- int ret;
- struct sbp_management_agent *agent;
-
- agent = kmalloc(sizeof(*agent), GFP_KERNEL);
- if (!agent)
- return ERR_PTR(-ENOMEM);
-
- spin_lock_init(&agent->lock);
- agent->tport = tport;
- agent->handler.length = 0x08;
- agent->handler.address_callback = sbp_mgt_agent_rw;
- agent->handler.callback_data = agent;
- agent->state = MANAGEMENT_AGENT_STATE_IDLE;
- INIT_WORK(&agent->work, sbp_mgt_agent_process);
- agent->orb_offset = 0;
- agent->request = NULL;
-
- ret = fw_core_add_address_handler(&agent->handler,
- &sbp_register_region);
- if (ret < 0) {
- kfree(agent);
- return ERR_PTR(ret);
- }
-
- return agent;
-}
-
-static void sbp_management_agent_unregister(struct sbp_management_agent *agent)
-{
- fw_core_remove_address_handler(&agent->handler);
- cancel_work_sync(&agent->work);
- kfree(agent);
-}
-
-static int sbp_check_true(struct se_portal_group *se_tpg)
-{
- return 1;
-}
-
-static int sbp_check_false(struct se_portal_group *se_tpg)
-{
- return 0;
-}
-
-static char *sbp_get_fabric_wwn(struct se_portal_group *se_tpg)
-{
- struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg);
- struct sbp_tport *tport = tpg->tport;
-
- return &tport->tport_name[0];
-}
-
-static u16 sbp_get_tag(struct se_portal_group *se_tpg)
-{
- struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg);
- return tpg->tport_tpgt;
-}
-
-static u32 sbp_tpg_get_inst_index(struct se_portal_group *se_tpg)
-{
- return 1;
-}
-
-static void sbp_release_cmd(struct se_cmd *se_cmd)
-{
- struct sbp_target_request *req = container_of(se_cmd,
- struct sbp_target_request, se_cmd);
-
- sbp_free_request(req);
-}
-
-static u32 sbp_sess_get_index(struct se_session *se_sess)
-{
- return 0;
-}
-
-static int sbp_write_pending(struct se_cmd *se_cmd)
-{
- struct sbp_target_request *req = container_of(se_cmd,
- struct sbp_target_request, se_cmd);
- int ret;
-
- ret = sbp_rw_data(req);
- if (ret) {
- req->status.status |= cpu_to_be32(
- STATUS_BLOCK_RESP(
- STATUS_RESP_TRANSPORT_FAILURE) |
- STATUS_BLOCK_DEAD(0) |
- STATUS_BLOCK_LEN(1) |
- STATUS_BLOCK_SBP_STATUS(
- SBP_STATUS_UNSPECIFIED_ERROR));
- sbp_send_status(req);
- return ret;
- }
-
- target_execute_cmd(se_cmd);
- return 0;
-}
-
-static void sbp_set_default_node_attrs(struct se_node_acl *nacl)
-{
- return;
-}
-
-static int sbp_get_cmd_state(struct se_cmd *se_cmd)
-{
- return 0;
-}
-
-static int sbp_queue_data_in(struct se_cmd *se_cmd)
-{
- struct sbp_target_request *req = container_of(se_cmd,
- struct sbp_target_request, se_cmd);
- int ret;
-
- ret = sbp_rw_data(req);
- if (ret) {
- req->status.status |= cpu_to_be32(
- STATUS_BLOCK_RESP(STATUS_RESP_TRANSPORT_FAILURE) |
- STATUS_BLOCK_DEAD(0) |
- STATUS_BLOCK_LEN(1) |
- STATUS_BLOCK_SBP_STATUS(SBP_STATUS_UNSPECIFIED_ERROR));
- sbp_send_status(req);
- return ret;
- }
-
- return sbp_send_sense(req);
-}
-
-/*
- * Called after command (no data transfer) or after the write (to device)
- * operation is completed
- */
-static int sbp_queue_status(struct se_cmd *se_cmd)
-{
- struct sbp_target_request *req = container_of(se_cmd,
- struct sbp_target_request, se_cmd);
-
- return sbp_send_sense(req);
-}
-
-static void sbp_queue_tm_rsp(struct se_cmd *se_cmd)
-{
-}
-
-static void sbp_aborted_task(struct se_cmd *se_cmd)
-{
- return;
-}
-
-static int sbp_check_stop_free(struct se_cmd *se_cmd)
-{
- struct sbp_target_request *req = container_of(se_cmd,
- struct sbp_target_request, se_cmd);
-
- return transport_generic_free_cmd(&req->se_cmd, 0);
-}
-
-static int sbp_count_se_tpg_luns(struct se_portal_group *tpg)
-{
- struct se_lun *lun;
- int count = 0;
-
- rcu_read_lock();
- hlist_for_each_entry_rcu(lun, &tpg->tpg_lun_hlist, link)
- count++;
- rcu_read_unlock();
-
- return count;
-}
-
-static int sbp_update_unit_directory(struct sbp_tport *tport)
-{
- struct se_lun *lun;
- int num_luns, num_entries, idx = 0, mgt_agt_addr, ret;
- u32 *data;
-
- if (tport->unit_directory.data) {
- fw_core_remove_descriptor(&tport->unit_directory);
- kfree(tport->unit_directory.data);
- tport->unit_directory.data = NULL;
- }
-
- if (!tport->enable || !tport->tpg)
- return 0;
-
- num_luns = sbp_count_se_tpg_luns(&tport->tpg->se_tpg);
-
- /*
- * Number of entries in the final unit directory:
- * - all of those in the template
- * - management_agent
- * - unit_characteristics
- * - reconnect_timeout
- * - unit unique ID
- * - one for each LUN
- *
- * MUST NOT include leaf or sub-directory entries
- */
- num_entries = ARRAY_SIZE(sbp_unit_directory_template) + 4 + num_luns;
-
- if (tport->directory_id != -1)
- num_entries++;
-
- /* allocate num_entries + 4 for the header and unique ID leaf */
- data = kcalloc((num_entries + 4), sizeof(u32), GFP_KERNEL);
- if (!data)
- return -ENOMEM;
-
- /* directory_length */
- data[idx++] = num_entries << 16;
-
- /* directory_id */
- if (tport->directory_id != -1)
- data[idx++] = (CSR_DIRECTORY_ID << 24) | tport->directory_id;
-
- /* unit directory template */
- memcpy(&data[idx], sbp_unit_directory_template,
- sizeof(sbp_unit_directory_template));
- idx += ARRAY_SIZE(sbp_unit_directory_template);
-
- /* management_agent */
- mgt_agt_addr = (tport->mgt_agt->handler.offset - CSR_REGISTER_BASE) / 4;
- data[idx++] = 0x54000000 | (mgt_agt_addr & 0x00ffffff);
-
- /* unit_characteristics */
- data[idx++] = 0x3a000000 |
- (((tport->mgt_orb_timeout * 2) << 8) & 0xff00) |
- SBP_ORB_FETCH_SIZE;
-
- /* reconnect_timeout */
- data[idx++] = 0x3d000000 | (tport->max_reconnect_timeout & 0xffff);
-
- /* unit unique ID (leaf is just after LUNs) */
- data[idx++] = 0x8d000000 | (num_luns + 1);
-
- rcu_read_lock();
- hlist_for_each_entry_rcu(lun, &tport->tpg->se_tpg.tpg_lun_hlist, link) {
- struct se_device *dev;
- int type;
- /*
- * rcu_dereference_raw protected by se_lun->lun_group symlink
- * reference to se_device->dev_group.
- */
- dev = rcu_dereference_raw(lun->lun_se_dev);
- type = dev->transport->get_device_type(dev);
-
- /* logical_unit_number */
- data[idx++] = 0x14000000 |
- ((type << 16) & 0x1f0000) |
- (lun->unpacked_lun & 0xffff);
- }
- rcu_read_unlock();
-
- /* unit unique ID leaf */
- data[idx++] = 2 << 16;
- data[idx++] = tport->guid >> 32;
- data[idx++] = tport->guid;
-
- tport->unit_directory.length = idx;
- tport->unit_directory.key = (CSR_DIRECTORY | CSR_UNIT) << 24;
- tport->unit_directory.data = data;
-
- ret = fw_core_add_descriptor(&tport->unit_directory);
- if (ret < 0) {
- kfree(tport->unit_directory.data);
- tport->unit_directory.data = NULL;
- }
-
- return ret;
-}
-
-static ssize_t sbp_parse_wwn(const char *name, u64 *wwn)
-{
- const char *cp;
- char c, nibble;
- int pos = 0, err;
-
- *wwn = 0;
- for (cp = name; cp < &name[SBP_NAMELEN - 1]; cp++) {
- c = *cp;
- if (c == '\n' && cp[1] == '\0')
- continue;
- if (c == '\0') {
- err = 2;
- if (pos != 16)
- goto fail;
- return cp - name;
- }
- err = 3;
- if (isdigit(c))
- nibble = c - '0';
- else if (isxdigit(c))
- nibble = tolower(c) - 'a' + 10;
- else
- goto fail;
- *wwn = (*wwn << 4) | nibble;
- pos++;
- }
- err = 4;
-fail:
- printk(KERN_INFO "err %u len %zu pos %u\n",
- err, cp - name, pos);
- return -1;
-}
-
-static ssize_t sbp_format_wwn(char *buf, size_t len, u64 wwn)
-{
- return snprintf(buf, len, "%016llx", wwn);
-}
-
-static int sbp_init_nodeacl(struct se_node_acl *se_nacl, const char *name)
-{
- u64 guid = 0;
-
- if (sbp_parse_wwn(name, &guid) < 0)
- return -EINVAL;
- return 0;
-}
-
-static int sbp_post_link_lun(
- struct se_portal_group *se_tpg,
- struct se_lun *se_lun)
-{
- struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg);
-
- return sbp_update_unit_directory(tpg->tport);
-}
-
-static void sbp_pre_unlink_lun(
- struct se_portal_group *se_tpg,
- struct se_lun *se_lun)
-{
- struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg);
- struct sbp_tport *tport = tpg->tport;
- int ret;
-
- if (sbp_count_se_tpg_luns(&tpg->se_tpg) == 0)
- tport->enable = 0;
-
- ret = sbp_update_unit_directory(tport);
- if (ret < 0)
- pr_err("unlink LUN: failed to update unit directory\n");
-}
-
-static struct se_portal_group *sbp_make_tpg(struct se_wwn *wwn,
- const char *name)
-{
- struct sbp_tport *tport =
- container_of(wwn, struct sbp_tport, tport_wwn);
-
- struct sbp_tpg *tpg;
- unsigned long tpgt;
- int ret;
-
- if (strstr(name, "tpgt_") != name)
- return ERR_PTR(-EINVAL);
- if (kstrtoul(name + 5, 10, &tpgt) || tpgt > UINT_MAX)
- return ERR_PTR(-EINVAL);
-
- if (tport->tpg) {
- pr_err("Only one TPG per Unit is possible.\n");
- return ERR_PTR(-EBUSY);
- }
-
- tpg = kzalloc(sizeof(*tpg), GFP_KERNEL);
- if (!tpg)
- return ERR_PTR(-ENOMEM);
-
- tpg->tport = tport;
- tpg->tport_tpgt = tpgt;
- tport->tpg = tpg;
-
- /* default attribute values */
- tport->enable = 0;
- tport->directory_id = -1;
- tport->mgt_orb_timeout = 15;
- tport->max_reconnect_timeout = 5;
- tport->max_logins_per_lun = 1;
-
- tport->mgt_agt = sbp_management_agent_register(tport);
- if (IS_ERR(tport->mgt_agt)) {
- ret = PTR_ERR(tport->mgt_agt);
- goto out_free_tpg;
- }
-
- ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_SBP);
- if (ret < 0)
- goto out_unreg_mgt_agt;
-
- return &tpg->se_tpg;
-
-out_unreg_mgt_agt:
- sbp_management_agent_unregister(tport->mgt_agt);
-out_free_tpg:
- tport->tpg = NULL;
- kfree(tpg);
- return ERR_PTR(ret);
-}
-
-static void sbp_drop_tpg(struct se_portal_group *se_tpg)
-{
- struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg);
- struct sbp_tport *tport = tpg->tport;
-
- core_tpg_deregister(se_tpg);
- sbp_management_agent_unregister(tport->mgt_agt);
- tport->tpg = NULL;
- kfree(tpg);
-}
-
-static struct se_wwn *sbp_make_tport(
- struct target_fabric_configfs *tf,
- struct config_group *group,
- const char *name)
-{
- struct sbp_tport *tport;
- u64 guid = 0;
-
- if (sbp_parse_wwn(name, &guid) < 0)
- return ERR_PTR(-EINVAL);
-
- tport = kzalloc(sizeof(*tport), GFP_KERNEL);
- if (!tport)
- return ERR_PTR(-ENOMEM);
-
- tport->guid = guid;
- sbp_format_wwn(tport->tport_name, SBP_NAMELEN, guid);
-
- return &tport->tport_wwn;
-}
-
-static void sbp_drop_tport(struct se_wwn *wwn)
-{
- struct sbp_tport *tport =
- container_of(wwn, struct sbp_tport, tport_wwn);
-
- kfree(tport);
-}
-
-static ssize_t sbp_wwn_version_show(struct config_item *item, char *page)
-{
- return sprintf(page, "FireWire SBP fabric module %s\n", SBP_VERSION);
-}
-
-CONFIGFS_ATTR_RO(sbp_wwn_, version);
-
-static struct configfs_attribute *sbp_wwn_attrs[] = {
- &sbp_wwn_attr_version,
- NULL,
-};
-
-static ssize_t sbp_tpg_directory_id_show(struct config_item *item, char *page)
-{
- struct se_portal_group *se_tpg = to_tpg(item);
- struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg);
- struct sbp_tport *tport = tpg->tport;
-
- if (tport->directory_id == -1)
- return sprintf(page, "implicit\n");
- else
- return sprintf(page, "%06x\n", tport->directory_id);
-}
-
-static ssize_t sbp_tpg_directory_id_store(struct config_item *item,
- const char *page, size_t count)
-{
- struct se_portal_group *se_tpg = to_tpg(item);
- struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg);
- struct sbp_tport *tport = tpg->tport;
- unsigned long val;
-
- if (tport->enable) {
- pr_err("Cannot change the directory_id on an active target.\n");
- return -EBUSY;
- }
-
- if (strstr(page, "implicit") == page) {
- tport->directory_id = -1;
- } else {
- if (kstrtoul(page, 16, &val) < 0)
- return -EINVAL;
- if (val > 0xffffff)
- return -EINVAL;
-
- tport->directory_id = val;
- }
-
- return count;
-}
-
-static ssize_t sbp_tpg_enable_show(struct config_item *item, char *page)
-{
- struct se_portal_group *se_tpg = to_tpg(item);
- struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg);
- struct sbp_tport *tport = tpg->tport;
- return sprintf(page, "%d\n", tport->enable);
-}
-
-static ssize_t sbp_tpg_enable_store(struct config_item *item,
- const char *page, size_t count)
-{
- struct se_portal_group *se_tpg = to_tpg(item);
- struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg);
- struct sbp_tport *tport = tpg->tport;
- unsigned long val;
- int ret;
-
- if (kstrtoul(page, 0, &val) < 0)
- return -EINVAL;
- if ((val != 0) && (val != 1))
- return -EINVAL;
-
- if (tport->enable == val)
- return count;
-
- if (val) {
- if (sbp_count_se_tpg_luns(&tpg->se_tpg) == 0) {
- pr_err("Cannot enable a target with no LUNs!\n");
- return -EINVAL;
- }
- } else {
- /* XXX: force-shutdown sessions instead? */
- spin_lock_bh(&se_tpg->session_lock);
- if (!list_empty(&se_tpg->tpg_sess_list)) {
- spin_unlock_bh(&se_tpg->session_lock);
- return -EBUSY;
- }
- spin_unlock_bh(&se_tpg->session_lock);
- }
-
- tport->enable = val;
-
- ret = sbp_update_unit_directory(tport);
- if (ret < 0) {
- pr_err("Could not update Config ROM\n");
- return ret;
- }
-
- return count;
-}
-
-CONFIGFS_ATTR(sbp_tpg_, directory_id);
-CONFIGFS_ATTR(sbp_tpg_, enable);
-
-static struct configfs_attribute *sbp_tpg_base_attrs[] = {
- &sbp_tpg_attr_directory_id,
- &sbp_tpg_attr_enable,
- NULL,
-};
-
-static ssize_t sbp_tpg_attrib_mgt_orb_timeout_show(struct config_item *item,
- char *page)
-{
- struct se_portal_group *se_tpg = attrib_to_tpg(item);
- struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg);
- struct sbp_tport *tport = tpg->tport;
- return sprintf(page, "%d\n", tport->mgt_orb_timeout);
-}
-
-static ssize_t sbp_tpg_attrib_mgt_orb_timeout_store(struct config_item *item,
- const char *page, size_t count)
-{
- struct se_portal_group *se_tpg = attrib_to_tpg(item);
- struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg);
- struct sbp_tport *tport = tpg->tport;
- unsigned long val;
- int ret;
-
- if (kstrtoul(page, 0, &val) < 0)
- return -EINVAL;
- if ((val < 1) || (val > 127))
- return -EINVAL;
-
- if (tport->mgt_orb_timeout == val)
- return count;
-
- tport->mgt_orb_timeout = val;
-
- ret = sbp_update_unit_directory(tport);
- if (ret < 0)
- return ret;
-
- return count;
-}
-
-static ssize_t sbp_tpg_attrib_max_reconnect_timeout_show(struct config_item *item,
- char *page)
-{
- struct se_portal_group *se_tpg = attrib_to_tpg(item);
- struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg);
- struct sbp_tport *tport = tpg->tport;
- return sprintf(page, "%d\n", tport->max_reconnect_timeout);
-}
-
-static ssize_t sbp_tpg_attrib_max_reconnect_timeout_store(struct config_item *item,
- const char *page, size_t count)
-{
- struct se_portal_group *se_tpg = attrib_to_tpg(item);
- struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg);
- struct sbp_tport *tport = tpg->tport;
- unsigned long val;
- int ret;
-
- if (kstrtoul(page, 0, &val) < 0)
- return -EINVAL;
- if ((val < 1) || (val > 32767))
- return -EINVAL;
-
- if (tport->max_reconnect_timeout == val)
- return count;
-
- tport->max_reconnect_timeout = val;
-
- ret = sbp_update_unit_directory(tport);
- if (ret < 0)
- return ret;
-
- return count;
-}
-
-static ssize_t sbp_tpg_attrib_max_logins_per_lun_show(struct config_item *item,
- char *page)
-{
- struct se_portal_group *se_tpg = attrib_to_tpg(item);
- struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg);
- struct sbp_tport *tport = tpg->tport;
- return sprintf(page, "%d\n", tport->max_logins_per_lun);
-}
-
-static ssize_t sbp_tpg_attrib_max_logins_per_lun_store(struct config_item *item,
- const char *page, size_t count)
-{
- struct se_portal_group *se_tpg = attrib_to_tpg(item);
- struct sbp_tpg *tpg = container_of(se_tpg, struct sbp_tpg, se_tpg);
- struct sbp_tport *tport = tpg->tport;
- unsigned long val;
-
- if (kstrtoul(page, 0, &val) < 0)
- return -EINVAL;
- if ((val < 1) || (val > 127))
- return -EINVAL;
-
- /* XXX: also check against current count? */
-
- tport->max_logins_per_lun = val;
-
- return count;
-}
-
-CONFIGFS_ATTR(sbp_tpg_attrib_, mgt_orb_timeout);
-CONFIGFS_ATTR(sbp_tpg_attrib_, max_reconnect_timeout);
-CONFIGFS_ATTR(sbp_tpg_attrib_, max_logins_per_lun);
-
-static struct configfs_attribute *sbp_tpg_attrib_attrs[] = {
- &sbp_tpg_attrib_attr_mgt_orb_timeout,
- &sbp_tpg_attrib_attr_max_reconnect_timeout,
- &sbp_tpg_attrib_attr_max_logins_per_lun,
- NULL,
-};
-
-static const struct target_core_fabric_ops sbp_ops = {
- .module = THIS_MODULE,
- .fabric_name = "sbp",
- .tpg_get_wwn = sbp_get_fabric_wwn,
- .tpg_get_tag = sbp_get_tag,
- .tpg_check_demo_mode = sbp_check_true,
- .tpg_check_demo_mode_cache = sbp_check_true,
- .tpg_check_demo_mode_write_protect = sbp_check_false,
- .tpg_check_prod_mode_write_protect = sbp_check_false,
- .tpg_get_inst_index = sbp_tpg_get_inst_index,
- .release_cmd = sbp_release_cmd,
- .sess_get_index = sbp_sess_get_index,
- .write_pending = sbp_write_pending,
- .set_default_node_attributes = sbp_set_default_node_attrs,
- .get_cmd_state = sbp_get_cmd_state,
- .queue_data_in = sbp_queue_data_in,
- .queue_status = sbp_queue_status,
- .queue_tm_rsp = sbp_queue_tm_rsp,
- .aborted_task = sbp_aborted_task,
- .check_stop_free = sbp_check_stop_free,
-
- .fabric_make_wwn = sbp_make_tport,
- .fabric_drop_wwn = sbp_drop_tport,
- .fabric_make_tpg = sbp_make_tpg,
- .fabric_drop_tpg = sbp_drop_tpg,
- .fabric_post_link = sbp_post_link_lun,
- .fabric_pre_unlink = sbp_pre_unlink_lun,
- .fabric_make_np = NULL,
- .fabric_drop_np = NULL,
- .fabric_init_nodeacl = sbp_init_nodeacl,
-
- .tfc_wwn_attrs = sbp_wwn_attrs,
- .tfc_tpg_base_attrs = sbp_tpg_base_attrs,
- .tfc_tpg_attrib_attrs = sbp_tpg_attrib_attrs,
-};
-
-static int __init sbp_init(void)
-{
- return target_register_template(&sbp_ops);
-};
-
-static void __exit sbp_exit(void)
-{
- target_unregister_template(&sbp_ops);
-};
-
-MODULE_DESCRIPTION("FireWire SBP fabric driver");
-MODULE_LICENSE("GPL");
-module_init(sbp_init);
-module_exit(sbp_exit);
diff --git a/drivers/target/sbp/sbp_target.h b/drivers/target/sbp/sbp_target.h
deleted file mode 100644
index 1d101ac86527..000000000000
--- a/drivers/target/sbp/sbp_target.h
+++ /dev/null
@@ -1,243 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _SBP_BASE_H
-#define _SBP_BASE_H
-
-#include <linux/firewire.h>
-#include <linux/spinlock.h>
-#include <linux/types.h>
-#include <linux/workqueue.h>
-#include <target/target_core_base.h>
-
-#define SBP_VERSION "v0.1"
-#define SBP_NAMELEN 32
-
-#define SBP_ORB_FETCH_SIZE 8
-
-#define MANAGEMENT_AGENT_STATE_IDLE 0
-#define MANAGEMENT_AGENT_STATE_BUSY 1
-
-#define ORB_NOTIFY(v) (((v) >> 31) & 0x01)
-#define ORB_REQUEST_FORMAT(v) (((v) >> 29) & 0x03)
-
-#define MANAGEMENT_ORB_FUNCTION(v) (((v) >> 16) & 0x0f)
-
-#define MANAGEMENT_ORB_FUNCTION_LOGIN 0x0
-#define MANAGEMENT_ORB_FUNCTION_QUERY_LOGINS 0x1
-#define MANAGEMENT_ORB_FUNCTION_RECONNECT 0x3
-#define MANAGEMENT_ORB_FUNCTION_SET_PASSWORD 0x4
-#define MANAGEMENT_ORB_FUNCTION_LOGOUT 0x7
-#define MANAGEMENT_ORB_FUNCTION_ABORT_TASK 0xb
-#define MANAGEMENT_ORB_FUNCTION_ABORT_TASK_SET 0xc
-#define MANAGEMENT_ORB_FUNCTION_LOGICAL_UNIT_RESET 0xe
-#define MANAGEMENT_ORB_FUNCTION_TARGET_RESET 0xf
-
-#define LOGIN_ORB_EXCLUSIVE(v) (((v) >> 28) & 0x01)
-#define LOGIN_ORB_RESERVED(v) (((v) >> 24) & 0x0f)
-#define LOGIN_ORB_RECONNECT(v) (((v) >> 20) & 0x0f)
-#define LOGIN_ORB_LUN(v) (((v) >> 0) & 0xffff)
-#define LOGIN_ORB_PASSWORD_LENGTH(v) (((v) >> 16) & 0xffff)
-#define LOGIN_ORB_RESPONSE_LENGTH(v) (((v) >> 0) & 0xffff)
-
-#define RECONNECT_ORB_LOGIN_ID(v) (((v) >> 0) & 0xffff)
-#define LOGOUT_ORB_LOGIN_ID(v) (((v) >> 0) & 0xffff)
-
-#define CMDBLK_ORB_DIRECTION(v) (((v) >> 27) & 0x01)
-#define CMDBLK_ORB_SPEED(v) (((v) >> 24) & 0x07)
-#define CMDBLK_ORB_MAX_PAYLOAD(v) (((v) >> 20) & 0x0f)
-#define CMDBLK_ORB_PG_TBL_PRESENT(v) (((v) >> 19) & 0x01)
-#define CMDBLK_ORB_PG_SIZE(v) (((v) >> 16) & 0x07)
-#define CMDBLK_ORB_DATA_SIZE(v) (((v) >> 0) & 0xffff)
-
-#define STATUS_BLOCK_SRC(v) (((v) & 0x03) << 30)
-#define STATUS_BLOCK_RESP(v) (((v) & 0x03) << 28)
-#define STATUS_BLOCK_DEAD(v) (((v) ? 1 : 0) << 27)
-#define STATUS_BLOCK_LEN(v) (((v) & 0x07) << 24)
-#define STATUS_BLOCK_SBP_STATUS(v) (((v) & 0xff) << 16)
-#define STATUS_BLOCK_ORB_OFFSET_HIGH(v) (((v) & 0xffff) << 0)
-
-#define STATUS_SRC_ORB_CONTINUING 0
-#define STATUS_SRC_ORB_FINISHED 1
-#define STATUS_SRC_UNSOLICITED 2
-
-#define STATUS_RESP_REQUEST_COMPLETE 0
-#define STATUS_RESP_TRANSPORT_FAILURE 1
-#define STATUS_RESP_ILLEGAL_REQUEST 2
-#define STATUS_RESP_VENDOR_DEPENDENT 3
-
-#define SBP_STATUS_OK 0
-#define SBP_STATUS_REQ_TYPE_NOTSUPP 1
-#define SBP_STATUS_SPEED_NOTSUPP 2
-#define SBP_STATUS_PAGE_SIZE_NOTSUPP 3
-#define SBP_STATUS_ACCESS_DENIED 4
-#define SBP_STATUS_LUN_NOTSUPP 5
-#define SBP_STATUS_PAYLOAD_TOO_SMALL 6
-/* 7 is reserved */
-#define SBP_STATUS_RESOURCES_UNAVAIL 8
-#define SBP_STATUS_FUNCTION_REJECTED 9
-#define SBP_STATUS_LOGIN_ID_UNKNOWN 10
-#define SBP_STATUS_DUMMY_ORB_COMPLETE 11
-#define SBP_STATUS_REQUEST_ABORTED 12
-#define SBP_STATUS_UNSPECIFIED_ERROR 0xff
-
-#define AGENT_STATE_RESET 0
-#define AGENT_STATE_ACTIVE 1
-#define AGENT_STATE_SUSPENDED 2
-#define AGENT_STATE_DEAD 3
-
-struct sbp2_pointer {
- __be32 high;
- __be32 low;
-};
-
-struct sbp_command_block_orb {
- struct sbp2_pointer next_orb;
- struct sbp2_pointer data_descriptor;
- __be32 misc;
- u8 command_block[12];
-};
-
-struct sbp_page_table_entry {
- __be16 segment_length;
- __be16 segment_base_hi;
- __be32 segment_base_lo;
-};
-
-struct sbp_management_orb {
- struct sbp2_pointer ptr1;
- struct sbp2_pointer ptr2;
- __be32 misc;
- __be32 length;
- struct sbp2_pointer status_fifo;
-};
-
-struct sbp_status_block {
- __be32 status;
- __be32 orb_low;
- u8 data[24];
-};
-
-struct sbp_login_response_block {
- __be32 misc;
- struct sbp2_pointer command_block_agent;
- __be32 reconnect_hold;
-};
-
-struct sbp_login_descriptor {
- struct sbp_session *sess;
- struct list_head link;
-
- u32 login_lun;
-
- u64 status_fifo_addr;
- int exclusive;
- u16 login_id;
-
- struct sbp_target_agent *tgt_agt;
-};
-
-struct sbp_session {
- spinlock_t lock;
- struct se_session *se_sess;
- struct list_head login_list;
- struct delayed_work maint_work;
-
- u64 guid; /* login_owner_EUI_64 */
- int node_id; /* login_owner_ID */
-
- struct fw_card *card;
- int generation;
- int speed;
-
- int reconnect_hold;
- u64 reconnect_expires;
-};
-
-struct sbp_tpg {
- /* Target portal group tag for TCM */
- u16 tport_tpgt;
- /* Pointer back to sbp_tport */
- struct sbp_tport *tport;
- /* Returned by sbp_make_tpg() */
- struct se_portal_group se_tpg;
-};
-
-struct sbp_tport {
- /* Target Unit Identifier (EUI-64) */
- u64 guid;
- /* Target port name */
- char tport_name[SBP_NAMELEN];
- /* Returned by sbp_make_tport() */
- struct se_wwn tport_wwn;
-
- struct sbp_tpg *tpg;
-
- /* FireWire unit directory */
- struct fw_descriptor unit_directory;
-
- /* SBP Management Agent */
- struct sbp_management_agent *mgt_agt;
-
- /* Parameters */
- int enable;
- s32 directory_id;
- int mgt_orb_timeout;
- int max_reconnect_timeout;
- int max_logins_per_lun;
-};
-
-static inline u64 sbp2_pointer_to_addr(const struct sbp2_pointer *ptr)
-{
- return (u64)(be32_to_cpu(ptr->high) & 0x0000ffff) << 32 |
- (be32_to_cpu(ptr->low) & 0xfffffffc);
-}
-
-static inline void addr_to_sbp2_pointer(u64 addr, struct sbp2_pointer *ptr)
-{
- ptr->high = cpu_to_be32(addr >> 32);
- ptr->low = cpu_to_be32(addr);
-}
-
-struct sbp_target_agent {
- spinlock_t lock;
- struct fw_address_handler handler;
- struct sbp_login_descriptor *login;
- int state;
- struct work_struct work;
- u64 orb_pointer;
- bool doorbell;
-};
-
-struct sbp_target_request {
- struct sbp_login_descriptor *login;
- u64 orb_pointer;
- struct sbp_command_block_orb orb;
- struct sbp_status_block status;
- struct work_struct work;
-
- struct se_cmd se_cmd;
- struct sbp_page_table_entry *pg_tbl;
- void *cmd_buf;
-
- unsigned char sense_buf[TRANSPORT_SENSE_BUFFER];
-};
-
-struct sbp_management_agent {
- spinlock_t lock;
- struct sbp_tport *tport;
- struct fw_address_handler handler;
- int state;
- struct work_struct work;
- u64 orb_offset;
- struct sbp_management_request *request;
-};
-
-struct sbp_management_request {
- struct sbp_management_orb orb;
- struct sbp_status_block status;
- struct fw_card *card;
- int generation;
- int node_addr;
- int speed;
-};
-
-#endif
--
2.27.0
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  Last update: 2020-06-13 10:39    [W:0.292 / U:0.320 seconds]
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