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Message-Id: <1464185854-19761-3-git-send-email-bryantly@linux.vnet.ibm.com>
Date: Wed, 25 May 2016 09:17:34 -0500
From: "Bryant G. Ly" <bryantly@...ux.vnet.ibm.com>
To: tyreld@...ux.vnet.ibm.com, bart.vanassche@...disk.com,
joe@...ches.com
Cc: martin.petersen@...cle.com, akpm@...ux-foundation.org,
kvalo@...eaurora.org, davem@...emloft.net, mchehab@....samsung.com,
jslaby@...e.com, bp@...e.de, linux-kernel@...r.kernel.org,
linux-scsi@...r.kernel.org, target-devel@...r.kernel.org,
bryantly <bryantly@...ux.vnet.ibm.com>
Subject: [PATCH 3/3] ibmvscsis: clean up functions
From: bryantly <bryantly@...ux.vnet.ibm.com>
This patch removes forward declarations and re-organizes the
functions within the driver. This patch also fixes MAINTAINERS
for ibmvscsis.
Signed-off-by: bryantly <bryantly@...ux.vnet.ibm.com>
---
MAINTAINERS | 4 +-
drivers/scsi/ibmvscsi/ibmvscsis.c | 2709 ++++++++++++++++++-------------------
2 files changed, 1315 insertions(+), 1398 deletions(-)
diff --git a/MAINTAINERS b/MAINTAINERS
index a11905c..3f09a15 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -5388,8 +5388,8 @@ L: target-devel@...r.kernel.org
S: Supported
F: drivers/scsi/ibmvscsi/ibmvscsis.c
F: drivers/scsi/ibmvscsi/ibmvscsis.h
-F: drivers/scsi/libsrp.h
-F: drivers/scsi/libsrp.c
+F: drivers/scsi/ibmvscsi/libsrp.c
+F: drivers/scsi/ibmvscsi/libsrp.h
IBM Power Virtual FC Device Drivers
M: Tyrel Datwyler <tyreld@...ux.vnet.ibm.com>
diff --git a/drivers/scsi/ibmvscsi/ibmvscsis.c b/drivers/scsi/ibmvscsi/ibmvscsis.c
index 6f9e9ba..610f4f5 100644
--- a/drivers/scsi/ibmvscsi/ibmvscsis.c
+++ b/drivers/scsi/ibmvscsi/ibmvscsis.c
@@ -62,88 +62,17 @@
#define SRP_RSP_SENSE_DATA_LEN 18
+static const char ibmvscsis_driver_name[] = "ibmvscsis";
+static char system_id[SYS_ID_NAME_LEN] = "";
+static char partition_name[PARTITION_NAMELEN] = "UNKNOWN";
+static unsigned int partition_number = -1;
+
static struct workqueue_struct *vtgtd;
static unsigned max_vdma_size = MAX_H_COPY_RDMA;
static DEFINE_SPINLOCK(ibmvscsis_dev_lock);
static LIST_HEAD(ibmvscsis_dev_list);
-static int ibmvscsis_probe(struct vio_dev *vdev,
- const struct vio_device_id *id);
-static void ibmvscsis_dev_release(struct device *dev);
-static void ibmvscsis_modify_rep_luns(struct se_cmd *se_cmd);
-static void ibmvscsis_modify_std_inquiry(struct se_cmd *se_cmd);
-static int read_dma_window(struct vio_dev *vdev,
- struct ibmvscsis_adapter *adapter);
-static char *ibmvscsis_get_fabric_name(void);
-static char *ibmvscsis_get_fabric_wwn(struct se_portal_group *se_tpg);
-static u16 ibmvscsis_get_tag(struct se_portal_group *se_tpg);
-static u32 ibmvscsis_get_default_depth(struct se_portal_group *se_tpg);
-static int ibmvscsis_check_true(struct se_portal_group *se_tpg);
-static int ibmvscsis_check_false(struct se_portal_group *se_tpg);
-static u32 ibmvscsis_tpg_get_inst_index(struct se_portal_group *se_tpg);
-static int ibmvscsis_check_stop_free(struct se_cmd *se_cmd);
-static void ibmvscsis_release_cmd(struct se_cmd *se_cmd);
-static int ibmvscsis_shutdown_session(struct se_session *se_sess);
-static void ibmvscsis_close_session(struct se_session *se_sess);
-static u32 ibmvscsis_sess_get_index(struct se_session *se_sess);
-static int ibmvscsis_write_pending(struct se_cmd *se_cmd);
-static int ibmvscsis_write_pending_status(struct se_cmd *se_cmd);
-static void ibmvscsis_set_default_node_attrs(struct se_node_acl *nacl);
-static int ibmvscsis_get_cmd_state(struct se_cmd *se_cmd);
-static int ibmvscsis_queue_data_in(struct se_cmd *se_cmd);
-static int ibmvscsis_queue_status(struct se_cmd *se_cmd);
-static void ibmvscsis_queue_tm_rsp(struct se_cmd *se_cmd);
-static void ibmvscsis_aborted_task(struct se_cmd *se_cmd);
-static struct se_wwn *ibmvscsis_make_tport(struct target_fabric_configfs *tf,
- struct config_group *group,
- const char *name);
-static void ibmvscsis_drop_tport(struct se_wwn *wwn);
-static struct se_portal_group *ibmvscsis_make_tpg(struct se_wwn *wwn,
- struct config_group *group,
- const char *name);
-static void ibmvscsis_drop_tpg(struct se_portal_group *se_tpg);
-static int ibmvscsis_remove(struct vio_dev *vdev);
-static ssize_t system_id_show(struct device *dev,
- struct device_attribute *attr,
- char *buf);
-static ssize_t partition_number_show(struct device *dev,
- struct device_attribute *attr,
- char *buf);
-static ssize_t unit_address_show(struct device *dev,
- struct device_attribute *attr, char *buf);
-static int get_system_info(void);
-static irqreturn_t ibmvscsis_interrupt(int dummy, void *data);
-static int process_srp_iu(struct iu_entry *iue);
-static void process_iu(struct viosrp_crq *crq,
- struct ibmvscsis_adapter *adapter);
-static void process_crq(struct viosrp_crq *crq,
- struct ibmvscsis_adapter *adapter);
-static void handle_crq(struct work_struct *work);
-static int ibmvscsis_reset_crq_queue(struct ibmvscsis_adapter *adapter);
-static void crq_queue_destroy(struct ibmvscsis_adapter *adapter);
-static inline struct viosrp_crq *next_crq(struct crq_queue *queue);
-static int send_iu(struct iu_entry *iue, u64 length, u8 format);
-static int send_adapter_info(struct iu_entry *iue,
- dma_addr_t remote_buffer, u16 length);
-static int process_mad_iu(struct iu_entry *iue);
-static void ibmvscsis_srp_i_logout(struct iu_entry *iue);
-static void process_login(struct iu_entry *iue);
-static void process_tsk_mgmt(struct ibmvscsis_adapter *adapter,
- struct iu_entry *iue);
-static int ibmvscsis_rdma(struct scsi_cmnd *sc, struct scatterlist *sg,
- int nsg, struct srp_direct_buf *md, int nmd,
- enum dma_data_direction dir, unsigned int rest);
-static int ibmvscsis_queuecommand(struct ibmvscsis_adapter *adapter,
- struct iu_entry *iue);
-static u64 ibmvscsis_unpack_lun(const u8 *lun, int len);
-static int tcm_queuecommand(struct ibmvscsis_adapter *adapter,
- struct ibmvscsis_cmnd *vsc,
- struct srp_cmd *scmd);
-static void ibmvscsis_determine_resid(struct se_cmd *se_cmd,
- struct srp_rsp *rsp);
-static bool connection_broken(struct ibmvscsis_adapter *adapter);
-
static inline long h_copy_rdma(s64 length, u64 sliobn, u64 slioba,
u64 dliobn, u64 dlioba)
{
@@ -189,986 +118,759 @@ static inline long h_send_crq(struct ibmvscsis_adapter *adapter,
return rc;
}
-/*****************************************************************************/
-/* Global device driver data areas */
-/*****************************************************************************/
-
-static const char ibmvscsis_driver_name[] = "ibmvscsis";
-static char system_id[SYS_ID_NAME_LEN] = "";
-static char partition_name[PARTITION_NAMELEN] = "UNKNOWN";
-static unsigned int partition_number = -1;
+static void ibmvscsis_determine_resid(struct se_cmd *se_cmd,
+ struct srp_rsp *rsp)
+{
+ if (se_cmd->residual_count) {
+ if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
+ if (se_cmd->data_direction == DMA_TO_DEVICE) {
+ /* residual data from an underflow write */
+ rsp->flags = SRP_RSP_FLAG_DOUNDER;
+ rsp->data_out_res_cnt =
+ cpu_to_be32(se_cmd->residual_count);
+ } else if (se_cmd->data_direction == DMA_FROM_DEVICE) {
+ /* residual data from an underflow read */
+ rsp->flags = SRP_RSP_FLAG_DIUNDER;
+ rsp->data_in_res_cnt =
+ cpu_to_be32(se_cmd->residual_count);
+ }
+ } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
+ if (se_cmd->data_direction == DMA_TO_DEVICE) {
+ /* residual data from an overflow write */
+ rsp->flags = SRP_RSP_FLAG_DOOVER;
+ rsp->data_out_res_cnt =
+ cpu_to_be32(se_cmd->residual_count);
+ } else if (se_cmd->data_direction ==
+ DMA_FROM_DEVICE) {
+ /* residual data from an overflow read */
+ rsp->flags = SRP_RSP_FLAG_DIOVER;
+ rsp->data_in_res_cnt =
+ cpu_to_be32(se_cmd->residual_count);
+ }
+ }
+ }
+}
-static struct class_attribute ibmvscsis_class_attrs[] = {
- __ATTR_NULL,
-};
+static bool connection_broken(struct ibmvscsis_adapter *adapter)
+{
+ u64 buffer[2];
+ struct viosrp_crq *crq;
+ long h_return_code;
+ bool rc = false;
-static struct device_attribute dev_attr_system_id =
- __ATTR(system_id, S_IRUGO, system_id_show, NULL);
+ /* create a PING crq */
+ crq = (struct viosrp_crq *)&buffer;
+ buffer[0] = 0;
+ buffer[1] = 0;
+ crq->valid = 0x80;
+ crq->format = 6;
+ crq->status = 0xF5;
-static struct device_attribute dev_attr_partition_number =
- __ATTR(partition_number, S_IRUGO, partition_number_show, NULL);
+ h_return_code = h_send_crq(adapter,
+ cpu_to_be64(buffer[0]),
+ cpu_to_be64(buffer[1]));
-static struct device_attribute dev_attr_unit_address =
- __ATTR(unit_address, S_IRUGO, unit_address_show, NULL);
+ pr_debug("connection_broken: rc %ld\n", h_return_code);
-static struct attribute *ibmvscsis_dev_attrs[] = {
- &dev_attr_system_id.attr,
- &dev_attr_partition_number.attr,
- &dev_attr_unit_address.attr,
-};
-ATTRIBUTE_GROUPS(ibmvscsis_dev);
+ if (h_return_code == H_CLOSED)
+ rc = true;
-static struct class ibmvscsis_class = {
- .name = "ibmvscsis",
- .dev_release = ibmvscsis_dev_release,
- .class_attrs = ibmvscsis_class_attrs,
- .dev_groups = ibmvscsis_dev_groups,
-};
+ return rc;
+}
-static ssize_t ibmvscsis_wwn_version_show(struct config_item *item,
- char *page)
+static u64 ibmvscsis_unpack_lun(const u8 *lun, int len)
{
- return scnprintf(page, PAGE_SIZE, "%s\n", IBMVSCSIS_VERSION);
-}
-CONFIGFS_ATTR_RO(ibmvscsis_wwn_, version);
+ u64 res = NO_SUCH_LUN;
+ int addressing_method;
-static struct configfs_attribute *ibmvscsis_wwn_attrs[] = {
- &ibmvscsis_wwn_attr_version,
- NULL,
-};
+ if (unlikely(len < 2)) {
+ pr_err("Illegal LUN length %d, expected 2 bytes or more\n",
+ len);
+ goto out;
+ }
-static ssize_t ibmvscsis_tpg_enable_show(struct config_item *item,
- char *page)
-{
- struct se_portal_group *se_tpg = to_tpg(item);
- struct ibmvscsis_tport *tport = container_of(se_tpg,
- struct ibmvscsis_tport,
- se_tpg);
+ switch (len) {
+ case 8:
+ if ((*((__be64 *)lun) & cpu_to_be64(0x0000FFFFFFFFFFFFLL)) != 0)
+ goto out_err;
+ break;
+ case 4:
+ if (*((__be16 *)&lun[2]) != 0)
+ goto out_err;
+ break;
+ case 6:
+ if (*((__be32 *)&lun[2]) != 0)
+ goto out_err;
+ break;
+ case 2:
+ break;
+ default:
+ goto out_err;
+ }
- return snprintf(page, PAGE_SIZE, "%d\n", (tport->enabled) ? 1 : 0);
+ addressing_method = (*lun) >> 6; /* highest two bits of byte 0 */
+ switch (addressing_method) {
+ case SCSI_LUN_ADDR_METHOD_PERIPHERAL:
+ case SCSI_LUN_ADDR_METHOD_FLAT:
+ case SCSI_LUN_ADDR_METHOD_LUN:
+ res = *(lun + 1) | (((*lun) & 0x3f) << 8);
+ break;
+
+ case SCSI_LUN_ADDR_METHOD_EXTENDED_LUN:
+ default:
+ pr_err("Unimplemented LUN addressing method %u\n",
+ addressing_method);
+ break;
+ }
+
+out:
+ return res;
+out_err:
+ pr_err("Support for multi-level LUNs has not yet been implemented\n");
+ goto out;
}
-static ssize_t ibmvscsis_tpg_enable_store(struct config_item *item,
- const char *page, size_t count)
+static void ibmvscsis_modify_rep_luns(struct se_cmd *se_cmd)
{
- struct se_portal_group *se_tpg = to_tpg(item);
- struct ibmvscsis_tport *tport = container_of(se_tpg,
- struct ibmvscsis_tport,
- se_tpg);
- unsigned long tmp;
- int ret;
+ s32 len = se_cmd->data_length;
+ u16 data_len;
+ unsigned char *buf = NULL;
- ret = kstrtoul(page, 0, &tmp);
- if (ret < 0) {
- pr_err("Unable to extract ibmvscsis_tpg_store_enable\n");
- return -EINVAL;
- }
+ if (len <= 8)
+ return;
- if ((tmp != 0) && (tmp != 1)) {
- pr_err("Illegal value for ibmvscsis_tpg_store_enable: %lu\n",
- tmp);
- return -EINVAL;
+ len -= 8;
+ buf = transport_kmap_data_sg(se_cmd);
+ if (buf) {
+ data_len = be32_to_cpu(*(u32 *)buf);
+ pr_debug("modify_rep_luns: len %d data_len %hud\n",
+ len, data_len);
+ if (data_len < len)
+ len = data_len;
+ buf += 8;
+ while (len > 0) {
+ *buf |= SCSI_LUN_ADDR_METHOD_FLAT << 6;
+ len -= 8;
+ buf += 8;
+ }
+ transport_kunmap_data_sg(se_cmd);
}
+}
- if (tmp == 1)
- tport->enabled = true;
- else
- tport->enabled = false;
+/*
+ * This function modifies the inquiry data prior to sending to initiator
+ * so that we can make support current AIX. Internally we are going to
+ * add new ODM entries to support the emulation from LIO. This function
+ * is temporary until those changes are done.
+ */
+static void ibmvscsis_modify_std_inquiry(struct se_cmd *se_cmd)
+{
+ struct se_device *dev = se_cmd->se_dev;
+ unsigned char *buf = NULL;
+ u32 cmd_len = se_cmd->data_length;
- return count;
+ if (cmd_len <= INQ_DATA_OFFSET)
+ return;
+
+ buf = transport_kmap_data_sg(se_cmd);
+ if (buf) {
+ memcpy(&buf[8], "IBM ", 8);
+ if (dev->transport->get_device_type(dev) == TYPE_ROM)
+ memcpy(&buf[16], "VOPTA ", 16);
+ else
+ memcpy(&buf[16], "3303 NVDISK", 16);
+ memcpy(&buf[32], "0001", 4);
+ transport_kunmap_data_sg(se_cmd);
+ }
}
-CONFIGFS_ATTR(ibmvscsis_tpg_, enable);
-static struct configfs_attribute *ibmvscsis_tpg_attrs[] = {
- &ibmvscsis_tpg_attr_enable,
- NULL,
-};
+static int read_dma_window(struct vio_dev *vdev,
+ struct ibmvscsis_adapter *adapter)
+{
+ const __be32 *dma_window;
+ const __be32 *prop;
-static const struct target_core_fabric_ops ibmvscsis_ops = {
- .module = THIS_MODULE,
- .name = "ibmvscsis",
- .max_data_sg_nents = SCSI_MAX_SG_SEGMENTS,
- .get_fabric_name = ibmvscsis_get_fabric_name,
- .tpg_get_wwn = ibmvscsis_get_fabric_wwn,
- .tpg_get_tag = ibmvscsis_get_tag,
- .tpg_get_default_depth = ibmvscsis_get_default_depth,
- .tpg_check_demo_mode = ibmvscsis_check_true,
- .tpg_check_demo_mode_cache = ibmvscsis_check_true,
- .tpg_check_demo_mode_write_protect = ibmvscsis_check_false,
- .tpg_check_prod_mode_write_protect = ibmvscsis_check_false,
- .tpg_get_inst_index = ibmvscsis_tpg_get_inst_index,
- .check_stop_free = ibmvscsis_check_stop_free,
- .release_cmd = ibmvscsis_release_cmd,
- .shutdown_session = ibmvscsis_shutdown_session,
- .close_session = ibmvscsis_close_session,
- .sess_get_index = ibmvscsis_sess_get_index,
- .write_pending = ibmvscsis_write_pending,
- .write_pending_status = ibmvscsis_write_pending_status,
- .set_default_node_attributes = ibmvscsis_set_default_node_attrs,
- .get_cmd_state = ibmvscsis_get_cmd_state,
- .queue_data_in = ibmvscsis_queue_data_in,
- .queue_status = ibmvscsis_queue_status,
- .queue_tm_rsp = ibmvscsis_queue_tm_rsp,
- .aborted_task = ibmvscsis_aborted_task,
- /*
- * Setup function pointers for logic in target_cor_fabric_configfs.c
- */
- .fabric_make_wwn = ibmvscsis_make_tport,
- .fabric_drop_wwn = ibmvscsis_drop_tport,
- .fabric_make_tpg = ibmvscsis_make_tpg,
- .fabric_drop_tpg = ibmvscsis_drop_tpg,
-
- .tfc_wwn_attrs = ibmvscsis_wwn_attrs,
- .tfc_tpg_base_attrs = ibmvscsis_tpg_attrs,
-};
-
-static struct vio_device_id ibmvscsis_device_table[] = {
- {"v-scsi-host", "IBM,v-scsi-host"},
- {"", ""}
-};
-MODULE_DEVICE_TABLE(vio, ibmvscsis_device_table);
-
-static struct vio_driver ibmvscsis_driver = {
- .name = ibmvscsis_driver_name,
- .id_table = ibmvscsis_device_table,
- .probe = ibmvscsis_probe,
- .remove = ibmvscsis_remove,
-};
-
-/*****************************************************************************/
-/* End of global device driver data areas */
-/*****************************************************************************/
-static int crq_queue_create(struct crq_queue *queue,
- struct ibmvscsis_adapter *adapter)
-{
- int retrc;
- int err;
- struct vio_dev *vdev = adapter->dma_dev;
-
- queue->msgs = (struct viosrp_crq *)get_zeroed_page(GFP_KERNEL);
-
- if (!queue->msgs)
- goto malloc_failed;
-
- queue->size = PAGE_SIZE / sizeof(*queue->msgs);
-
- queue->msg_token = dma_map_single(&vdev->dev, queue->msgs,
- queue->size * sizeof(*queue->msgs),
- DMA_BIDIRECTIONAL);
-
- if (dma_mapping_error(&vdev->dev, queue->msg_token))
- goto map_failed;
-
- err = h_reg_crq(vdev->unit_address, queue->msg_token,
- PAGE_SIZE);
- retrc = err;
-
- /* If the adapter was left active for some reason (like kexec)
- * try freeing and re-registering
+ /* TODO Using of_parse_dma_window would be better, but it doesn't give
+ * a way to read multiple windows without already knowing the size of
+ * a window or the number of windows
*/
- if (err == H_RESOURCE)
- err = ibmvscsis_reset_crq_queue(adapter);
- if (err == 2) {
- pr_warn("Partner adapter not ready\n");
- retrc = 0;
- } else if (err != 0) {
- pr_err("Error 0x%x opening virtual adapter\n", err);
- goto reg_crq_failed;
+ dma_window =
+ (const __be32 *)vio_get_attribute(vdev, "ibm,my-dma-window",
+ NULL);
+ if (!dma_window) {
+ pr_err("Couldn't find ibm,my-dma-window property\n");
+ return -1;
}
- queue->cur = 0;
- spin_lock_init(&queue->lock);
-
- INIT_WORK(&adapter->crq_work, handle_crq);
+ adapter->liobn = be32_to_cpu(*dma_window);
+ dma_window++;
- err = request_irq(vdev->irq, &ibmvscsis_interrupt,
- 0, "ibmvscsis", adapter);
- if (err) {
- pr_err("Error 0x%x h_send_crq\n", err);
- goto req_irq_failed;
+ prop = (const __be32 *)vio_get_attribute(vdev, "ibm,#dma-address-cells",
+ NULL);
+ if (!prop) {
+ pr_warn("Couldn't find ibm, #dma-address-cells property\n");
+ dma_window++;
+ } else {
+ dma_window += be32_to_cpu(*prop);
}
- err = vio_enable_interrupts(vdev);
- if (err != 0) {
- pr_err("Error %d enabling interrupts!!!\n", err);
- goto req_irq_failed;
+ prop = (const __be32 *)vio_get_attribute(vdev, "ibm,#dma-size-cells",
+ NULL);
+ if (!prop) {
+ pr_warn("Couldn't find ibm, #dma-size-cells property\n");
+ dma_window++;
+ } else {
+ dma_window += be32_to_cpu(*prop);
}
- return retrc;
+ /* dma_window should point to the second window now */
+ adapter->riobn = be32_to_cpu(*dma_window);
-req_irq_failed:
- h_free_crq(vdev->unit_address);
-reg_crq_failed:
- dma_unmap_single(&vdev->dev, queue->msg_token,
- queue->size * sizeof(*queue->msgs), DMA_BIDIRECTIONAL);
-map_failed:
- free_page((unsigned long)queue->msgs);
-malloc_failed:
- return -1;
+ return 0;
}
-static int ibmvscsis_probe(struct vio_dev *vdev, const struct vio_device_id *id)
+static struct ibmvscsis_tport *ibmvscsis_lookup_port(const char *name)
{
- int ret = -ENOMEM;
- struct ibmvscsis_adapter *adapter;
- struct srp_target *target;
struct ibmvscsis_tport *tport;
+ struct vio_dev *vdev;
+ struct ibmvscsis_adapter *adapter;
+ int ret;
unsigned long flags;
- pr_debug("Probe for UA 0x%x\n", vdev->unit_address);
-
- adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
- if (!adapter)
- return ret;
- target = kzalloc(sizeof(*target), GFP_KERNEL);
- if (!target)
- goto free_adapter;
-
- adapter->dma_dev = vdev;
- adapter->target = target;
- tport = &adapter->tport;
+ spin_lock_irqsave(&ibmvscsis_dev_lock, flags);
+ list_for_each_entry(adapter, &ibmvscsis_dev_list, list) {
+ vdev = adapter->dma_dev;
+ ret = strcmp(dev_name(&vdev->dev), name);
+ if (ret == 0)
+ tport = &adapter->tport;
+ if (tport)
+ goto found;
+ }
+ spin_unlock_irqrestore(&ibmvscsis_dev_lock, flags);
+ return NULL;
+found:
+ spin_unlock_irqrestore(&ibmvscsis_dev_lock, flags);
+ return tport;
+}
- tport->enabled = false;
- snprintf(&adapter->tport.tport_name[0], 256, "%s",
- dev_name(&vdev->dev));
+static irqreturn_t ibmvscsis_interrupt(int dummy, void *data)
+{
+ struct ibmvscsis_adapter *adapter = data;
- ret = read_dma_window(adapter->dma_dev, adapter);
- if (ret != 0)
- goto free_target;
+ vio_disable_interrupts(adapter->dma_dev);
+ queue_work(vtgtd, &adapter->crq_work);
- pr_debug("Probe: liobn 0x%x, riobn 0x%x\n", adapter->liobn,
- adapter->riobn);
+ return IRQ_HANDLED;
+}
- spin_lock_irqsave(&ibmvscsis_dev_lock, flags);
- list_add_tail(&adapter->list, &ibmvscsis_dev_list);
- spin_unlock_irqrestore(&ibmvscsis_dev_lock, flags);
+static int send_iu(struct iu_entry *iue, u64 length, u8 format)
+{
+ struct srp_target *target = iue->target;
+ struct ibmvscsis_adapter *adapter = target->ldata;
+ struct ibmvscsis_crq_msg crq_msg;
+ struct srp_rsp *rsp;
+ __be64 *crq_as_u64 = (__be64 *)&crq_msg;
+ long rc, rc1;
- ret = srp_target_alloc(target, &vdev->dev,
- INITIAL_SRP_LIMIT,
- SRP_MAX_IU_LEN);
+ rsp = &vio_iu(iue)->srp.rsp;
+ pr_debug("send_iu: 0x%lx 0x%lx 0x%lx 0x%lx 0x%lx\n",
+ (unsigned long)length,
+ (unsigned long)adapter->liobn,
+ (unsigned long)iue->sbuf->dma,
+ (unsigned long)adapter->riobn,
+ (unsigned long)be64_to_cpu(iue->remote_token));
- adapter->target->ldata = adapter;
+ /* First copy the SRP */
+ rc = h_copy_rdma(length, adapter->liobn, iue->sbuf->dma,
+ adapter->riobn, be64_to_cpu(iue->remote_token));
- if (ret) {
- pr_err("failed target alloc ret: %d\n", ret);
- goto free_srp_target;
+ switch (rc) {
+ case H_SUCCESS:
+ break;
+ case H_PERMISSION:
+ case H_SOURCE_PARM:
+ case H_DEST_PARM:
+ if (connection_broken(adapter)) {
+ pr_debug("rdma connection broken\n");
+ goto end;
+ }
+ break;
+ default:
+ pr_err("Error %ld transferring data\n", rc);
+ length = 0;
+ break;
}
- ret = crq_queue_create(&adapter->crq_queue, adapter);
- if (ret != 0 && ret != H_RESOURCE) {
- pr_err("failed crq_queue_create ret: %d\n", ret);
- ret = -1;
- }
+ pr_debug("crq pre cooked: 0x%x, 0x%llx, 0x%llx\n",
+ format, length, vio_iu(iue)->srp.rsp.tag);
- if (h_send_crq(adapter, 0xC001000000000000LL, 0) != 0 &&
- ret != H_RESOURCE) {
- pr_warn("Failed to send CRQ message\n");
- ret = 0;
- }
+ crq_msg.valid = 0x80;
+ crq_msg.format = format;
+ crq_msg.rsvd = 0;
+ if (rc == 0)
+ crq_msg.status = 0x99;
+ else
+ crq_msg.status = rsp->status;
+ crq_msg.rsvd1 = 0;
+ crq_msg.IU_length = cpu_to_be16(length);
+ crq_msg.IU_data_ptr = vio_iu(iue)->srp.rsp.tag;
- dev_set_drvdata(&vdev->dev, adapter);
+ pr_debug("send crq: 0x%x, 0x%llx, 0x%llx\n",
+ adapter->dma_dev->unit_address,
+ be64_to_cpu(crq_as_u64[0]),
+ be64_to_cpu(crq_as_u64[1]));
- return 0;
+ srp_iu_put(iue);
-free_srp_target:
- srp_target_free(target);
-free_target:
- kfree(target);
-free_adapter:
- kfree(adapter);
- return ret;
-}
+ rc1 = h_send_crq(adapter, be64_to_cpu(crq_as_u64[0]),
+ be64_to_cpu(crq_as_u64[1]));
-static int ibmvscsis_remove(struct vio_dev *dev)
-{
- unsigned long flags;
- struct ibmvscsis_adapter *adapter = dev_get_drvdata(&dev->dev);
- struct srp_target *target;
+ if (rc1) {
+ pr_err("%ld sending response\n", rc1);
+ return rc1;
+ }
+ return rc;
+end:
+ return rc;
+}
- target = adapter->target;
+static int ibmvscsis_reset_crq_queue(struct ibmvscsis_adapter *adapter)
+{
+ int rc = 0;
+ struct vio_dev *vdev = adapter->dma_dev;
+ struct crq_queue *queue = &adapter->crq_queue;
- spin_lock_irqsave(&ibmvscsis_dev_lock, flags);
- list_del(&adapter->list);
- spin_unlock_irqrestore(&ibmvscsis_dev_lock, flags);
+ /* Close the CRQ */
+ h_free_crq(vdev->unit_address);
- crq_queue_destroy(adapter);
- srp_target_free(target);
+ /* Clean out the queue */
+ memset(queue->msgs, 0x00, PAGE_SIZE);
+ queue->cur = 0;
- kfree(target);
- kfree(adapter);
+ /* And re-open it again */
+ rc = h_reg_crq(vdev->unit_address, queue->msg_token, PAGE_SIZE);
+ if (rc == 2)
+ /* Adapter is good, but other end is not ready */
+ pr_warn("Partner adapter not ready\n");
+ else if (rc != 0)
+ pr_err("Couldn't register crq--rc 0x%x\n", rc);
- return 0;
+ return rc;
}
-static void ibmvscsis_modify_rep_luns(struct se_cmd *se_cmd)
+static int send_adapter_info(struct iu_entry *iue,
+ dma_addr_t remote_buffer, u16 length)
{
- s32 len = se_cmd->data_length;
- u16 data_len;
- unsigned char *buf = NULL;
+ struct srp_target *target = iue->target;
+ struct ibmvscsis_adapter *adapter = target->ldata;
+ dma_addr_t data_token;
+ struct viosrp_adapter_info *mad = &vio_iu(iue)->mad.adapter_info;
+ struct mad_adapter_info_data *info;
+ int err;
- if (len <= 8)
- return;
+ mad->common.status = cpu_to_be16(VIOSRP_MAD_SUCCESS);
- len -= 8;
- buf = transport_kmap_data_sg(se_cmd);
- if (buf) {
- data_len = be32_to_cpu(*(u32 *)buf);
- pr_debug("modify_rep_luns: len %d data_len %hud\n",
- len, data_len);
- if (data_len < len)
- len = data_len;
- buf += 8;
- while (len > 0) {
- *buf |= SCSI_LUN_ADDR_METHOD_FLAT << 6;
- len -= 8;
- buf += 8;
- }
- transport_kunmap_data_sg(se_cmd);
+ if (be16_to_cpu(mad->common.length) > sizeof(*info)) {
+ mad->common.status = cpu_to_be16(VIOSRP_MAD_FAILED);
+ return 0;
}
-}
-/*
- * This function modifies the inquiry data prior to sending to initiator
- * so that we can make support current AIX. Internally we are going to
- * add new ODM entries to support the emulation from LIO. This function
- * is temporary until those changes are done.
- */
-static void ibmvscsis_modify_std_inquiry(struct se_cmd *se_cmd)
-{
- struct se_device *dev = se_cmd->se_dev;
- unsigned char *buf = NULL;
- u32 cmd_len = se_cmd->data_length;
+ info = dma_alloc_coherent(&adapter->dma_dev->dev, sizeof(*info),
+ &data_token, GFP_KERNEL);
+ if (!info) {
+ pr_err("bad dma_alloc_coherent %p\n", target);
+ mad->common.status = cpu_to_be16(VIOSRP_MAD_FAILED);
+ return 1;
+ }
- if (cmd_len <= INQ_DATA_OFFSET)
- return;
+ /* Get remote info */
+ err = h_copy_rdma(sizeof(*info), adapter->riobn,
+ be64_to_cpu(remote_buffer),
+ adapter->liobn, data_token);
- buf = transport_kmap_data_sg(se_cmd);
- if (buf) {
- memcpy(&buf[8], "IBM ", 8);
- if (dev->transport->get_device_type(dev) == TYPE_ROM)
- memcpy(&buf[16], "VOPTA ", 16);
- else
- memcpy(&buf[16], "3303 NVDISK", 16);
- memcpy(&buf[32], "0001", 4);
- transport_kunmap_data_sg(se_cmd);
- }
-}
+ if (err == H_SUCCESS) {
+ pr_err("Client connect: %s (%d)\n",
+ info->partition_name, info->partition_number);
-static int read_dma_window(struct vio_dev *vdev,
- struct ibmvscsis_adapter *adapter)
-{
- const __be32 *dma_window;
- const __be32 *prop;
+ if (adapter->client_data.partition_number == 0)
+ adapter->client_data.partition_number =
+ be32_to_cpu(info->partition_number);
+ strncpy(adapter->client_data.srp_version, info->srp_version,
+ sizeof(adapter->client_data.srp_version));
+ strncpy(adapter->client_data.partition_name,
+ info->partition_name,
+ sizeof(adapter->client_data.partition_name));
+ adapter->client_data.mad_version =
+ be32_to_cpu(info->mad_version);
+ adapter->client_data.os_type = be32_to_cpu(info->os_type);
+ pr_debug("adapter info client adapter %u\n",
+ adapter->client_data.os_type);
- /* TODO Using of_parse_dma_window would be better, but it doesn't give
- * a way to read multiple windows without already knowing the size of
- * a window or the number of windows
- */
- dma_window =
- (const __be32 *)vio_get_attribute(vdev, "ibm,my-dma-window",
- NULL);
- if (!dma_window) {
- pr_err("Couldn't find ibm,my-dma-window property\n");
- return -1;
- }
+ strcpy(info->srp_version, "16.a");
+ strncpy(info->partition_name, partition_name,
+ sizeof(info->partition_name));
- adapter->liobn = be32_to_cpu(*dma_window);
- dma_window++;
+ info->partition_number = cpu_to_be32(partition_number);
+ info->mad_version = cpu_to_be32(1);
+ info->os_type = cpu_to_be32(2);
+ memset(&info->port_max_txu[0], 0, sizeof(info->port_max_txu));
+ info->port_max_txu[0] = cpu_to_be32(SCSI_MAX_SG_SEGMENTS *
+ PAGE_SIZE);
- prop = (const __be32 *)vio_get_attribute(vdev, "ibm,#dma-address-cells",
- NULL);
- if (!prop) {
- pr_warn("Couldn't find ibm, #dma-address-cells property\n");
- dma_window++;
- } else {
- dma_window += be32_to_cpu(*prop);
- }
+ dma_rmb();
+ /* Send our info to remote */
+ err = h_copy_rdma(sizeof(*info), adapter->liobn, data_token,
+ adapter->riobn, be64_to_cpu(remote_buffer));
- prop = (const __be32 *)vio_get_attribute(vdev, "ibm,#dma-size-cells",
- NULL);
- if (!prop) {
- pr_warn("Couldn't find ibm, #dma-size-cells property\n");
- dma_window++;
+ switch (err) {
+ case H_SUCCESS:
+ break;
+ case H_PERMISSION:
+ case H_SOURCE_PARM:
+ case H_DEST_PARM:
+ if (connection_broken(adapter))
+ pr_debug("rdma connection broken\n");
+ default:
+ pr_err("Error sending adapter info %d\n",
+ err);
+ return -EIO;
+ }
} else {
- dma_window += be32_to_cpu(*prop);
+ pr_err("Error sending adapter info %d\n", err);
+ return 1;
}
- /* dma_window should point to the second window now */
- adapter->riobn = be32_to_cpu(*dma_window);
+ dma_free_coherent(&adapter->dma_dev->dev, sizeof(*info), info,
+ data_token);
return 0;
}
-static void ibmvscsis_dev_release(struct device *dev) {};
-
-static char *ibmvscsis_get_fabric_name(void)
-{
- return "ibmvscsis";
-}
-
-static char *ibmvscsis_get_fabric_wwn(struct se_portal_group *se_tpg)
-{
- struct ibmvscsis_tport *tport =
- container_of(se_tpg, struct ibmvscsis_tport, se_tpg);
-
- return &tport->tport_name[0];
-}
-
-static u16 ibmvscsis_get_tag(struct se_portal_group *se_tpg)
+static int process_mad_iu(struct iu_entry *iue)
{
- struct ibmvscsis_tport *tport =
- container_of(se_tpg, struct ibmvscsis_tport, se_tpg);
+ union viosrp_iu *iu = vio_iu(iue);
+ struct viosrp_adapter_info *info;
+ struct viosrp_host_config *conf;
- return tport->tport_tpgt;
-}
+ switch (be32_to_cpu(iu->mad.empty_iu.common.type)) {
+ case VIOSRP_EMPTY_IU_TYPE:
+ pr_err("%s\n", "Unsupported EMPTY MAD IU");
+ break;
+ case VIOSRP_ERROR_LOG_TYPE:
+ pr_err("%s\n", "Unsupported ERROR LOG MAD IU");
+ iu->mad.error_log.common.status = 1;
+ send_iu(iue, sizeof(iu->mad.error_log), VIOSRP_MAD_FORMAT);
+ break;
+ case VIOSRP_ADAPTER_INFO_TYPE:
+ info = &iu->mad.adapter_info;
+ info->common.status = send_adapter_info(iue, info->buffer,
+ info->common.length);
+ send_iu(iue, sizeof(*info), VIOSRP_MAD_FORMAT);
+ break;
+ case VIOSRP_HOST_CONFIG_TYPE:
+ conf = &iu->mad.host_config;
+ conf->common.status = 1;
+ send_iu(iue, sizeof(*conf), VIOSRP_MAD_FORMAT);
+ break;
+ default:
+ pr_err("Unknown type %u\n", iu->srp.rsp.opcode);
+ iu->mad.empty_iu.common.status =
+ cpu_to_be16(VIOSRP_MAD_NOT_SUPPORTED);
+ send_iu(iue, sizeof(iu->mad), VIOSRP_MAD_FORMAT);
+ break;
+ }
-static u32 ibmvscsis_get_default_depth(struct se_portal_group *se_tpg)
-{
return 1;
}
-static int ibmvscsis_check_true(struct se_portal_group *se_tpg)
+static struct se_portal_group *ibmvscsis_make_nexus(struct ibmvscsis_tport
+ *tport,
+ const char *name)
{
- return 1;
-}
+ struct se_node_acl *acl;
-static int ibmvscsis_check_false(struct se_portal_group *se_tpg)
-{
- return 0;
-}
+ if (tport->se_sess) {
+ pr_debug("tport->se_sess already exists\n");
+ return &tport->se_tpg;
+ }
-static u32 ibmvscsis_tpg_get_inst_index(struct se_portal_group *se_tpg)
-{
- return 1;
-}
-
-static int ibmvscsis_check_stop_free(struct se_cmd *se_cmd)
-{
- struct ibmvscsis_cmnd *cmd = container_of(se_cmd,
- struct ibmvscsis_cmnd,
- se_cmd);
-
- return target_put_sess_cmd(&cmd->se_cmd);
-}
-
-static void ibmvscsis_release_cmd(struct se_cmd *se_cmd)
-{
- struct ibmvscsis_cmnd *cmd =
- container_of(se_cmd, struct ibmvscsis_cmnd, se_cmd);
-
- kfree(cmd);
-}
+ /*
+ * Initialize the struct se_session pointer and setup tagpool
+ * for struct ibmvscsis_cmd descriptors
+ */
+ tport->se_sess = transport_init_session(TARGET_PROT_NORMAL);
+ if (IS_ERR(tport->se_sess))
+ goto transport_init_fail;
-static int ibmvscsis_shutdown_session(struct se_session *se_sess)
-{
- return 0;
-}
+ /*
+ * Since we are running in 'demo mode' this call will generate a
+ * struct se_node_acl for the ibmvscsis struct se_portal_group with
+ * the SCSI Initiator port name of the passed configfs group 'name'.
+ */
-static void ibmvscsis_close_session(struct se_session *se_sess)
-{
-}
+ acl = core_tpg_check_initiator_node_acl(&tport->se_tpg,
+ (unsigned char *)name);
+ if (!acl) {
+ pr_debug("core_tpg_check_initiator_node_acl() failed for %s\n",
+ name);
+ goto acl_failed;
+ }
+ tport->se_sess->se_node_acl = acl;
-static u32 ibmvscsis_sess_get_index(struct se_session *se_sess)
-{
- return 0;
-}
+ /*
+ * Now register the TCM ibmvscsis virtual I_T Nexus as active.
+ */
+ transport_register_session(&tport->se_tpg,
+ tport->se_sess->se_node_acl,
+ tport->se_sess, tport);
-static int ibmvscsis_write_pending(struct se_cmd *se_cmd)
-{
- struct ibmvscsis_cmnd *cmd = container_of(se_cmd,
- struct ibmvscsis_cmnd,
- se_cmd);
- struct scsi_cmnd *sc = &cmd->sc;
- struct iu_entry *iue = (struct iu_entry *)sc->SCp.ptr;
- int ret;
+ tport->se_sess->se_tpg = &tport->se_tpg;
- sc->sdb.length = se_cmd->data_length;
- sc->sdb.table.nents = se_cmd->t_data_nents;
- sc->sdb.table.sgl = se_cmd->t_data_sg;
+ return &tport->se_tpg;
- ret = srp_transfer_data(sc, &vio_iu(iue)->srp.cmd,
- ibmvscsis_rdma, 1, 1);
- if (ret) {
- pr_err("srp_transfer_data() failed: %d\n", ret);
- return -EAGAIN;
- }
- /*
- * We now tell TCM to add this WRITE CDB directly into the TCM storage
- * object execution queue.
- */
- target_execute_cmd(&cmd->se_cmd);
- return 0;
+acl_failed:
+ transport_free_session(tport->se_sess);
+transport_init_fail:
+ kfree(tport);
+ return ERR_PTR(-ENOMEM);
}
-static int ibmvscsis_write_pending_status(struct se_cmd *se_cmd)
+static int ibmvscsis_drop_nexus(struct ibmvscsis_tport *tport)
{
- return 0;
-}
+ struct se_session *se_sess;
-static void ibmvscsis_set_default_node_attrs(struct se_node_acl *nacl)
-{
-}
+ se_sess = tport->se_sess;
+ if (!se_sess)
+ return -ENODEV;
-static int ibmvscsis_get_cmd_state(struct se_cmd *se_cmd)
-{
+ transport_deregister_session(tport->se_sess);
+ transport_free_session(tport->se_sess);
return 0;
}
-static void ibmvscsis_determine_resid(struct se_cmd *se_cmd,
- struct srp_rsp *rsp)
-{
- if (se_cmd->residual_count) {
- if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
- if (se_cmd->data_direction == DMA_TO_DEVICE) {
- /* residual data from an underflow write */
- rsp->flags = SRP_RSP_FLAG_DOUNDER;
- rsp->data_out_res_cnt =
- cpu_to_be32(se_cmd->residual_count);
- } else if (se_cmd->data_direction == DMA_FROM_DEVICE) {
- /* residual data from an underflow read */
- rsp->flags = SRP_RSP_FLAG_DIUNDER;
- rsp->data_in_res_cnt =
- cpu_to_be32(se_cmd->residual_count);
- }
- } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
- if (se_cmd->data_direction == DMA_TO_DEVICE) {
- /* residual data from an overflow write */
- rsp->flags = SRP_RSP_FLAG_DOOVER;
- rsp->data_out_res_cnt =
- cpu_to_be32(se_cmd->residual_count);
- } else if (se_cmd->data_direction ==
- DMA_FROM_DEVICE) {
- /* residual data from an overflow read */
- rsp->flags = SRP_RSP_FLAG_DIOVER;
- rsp->data_in_res_cnt =
- cpu_to_be32(se_cmd->residual_count);
- }
- }
- }
-}
-
-static int ibmvscsis_queue_data_in(struct se_cmd *se_cmd)
+static void process_login(struct iu_entry *iue)
{
- struct ibmvscsis_cmnd *cmd = container_of(se_cmd,
- struct ibmvscsis_cmnd,
- se_cmd);
- struct scsi_cmnd *sc = &cmd->sc;
- struct iu_entry *iue = (struct iu_entry *)sc->SCp.ptr;
- struct srp_cmd *srp = (struct srp_cmd *)iue->sbuf->buf;
- struct srp_rsp *rsp;
- char *sd;
- char *data;
- int ret;
- uint len;
-
+ union viosrp_iu *iu = vio_iu(iue);
+ struct srp_login_rsp *rsp = &iu->srp.login_rsp;
+ struct srp_login_rej *rej = &iu->srp.login_rej;
struct srp_target *target = iue->target;
struct ibmvscsis_adapter *adapter = target->ldata;
+ struct vio_dev *vdev = adapter->dma_dev;
+ struct se_portal_group *se_tpg;
+ char name[16];
+ u64 tag = iu->srp.rsp.tag;
/*
- * Check for overflow residual count
+ * TODO handle case that requested size is wrong and buffer
+ * format is wrong
*/
+ memset(iu, 0, max(sizeof(*rsp), sizeof(*rej)));
- if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT)
- scsi_set_resid(sc, se_cmd->residual_count);
+ snprintf(name, sizeof(name), "%x", vdev->unit_address);
- sc->sdb.length = se_cmd->data_length;
- sc->sdb.table.nents = se_cmd->t_data_nents;
- sc->sdb.table.sgl = se_cmd->t_data_sg;
+ if (!adapter->tport.enabled) {
+ rej->reason = cpu_to_be32(SRP_LOGIN_REJ_INSUFFICIENT_RESOURCES);
+ pr_err("Rejected SRP_LOGIN_REQ because target %s has not yet been enabled",
+ name);
+ goto reject;
+ }
- if (scsi_sg_count(sc)) {
- if (srp->cdb[0] == REPORT_LUNS &&
- adapter->client_data.os_type != LINUX)
- ibmvscsis_modify_rep_luns(se_cmd);
- if ((srp->cdb[0] == INQUIRY) && ((srp->cdb[1] & 0x1) == 0))
- ibmvscsis_modify_std_inquiry(se_cmd);
- ret = srp_transfer_data(sc, &vio_iu(iue)->srp.cmd,
- ibmvscsis_rdma, 1, 1);
- if (ret) {
- pr_err("srp_transfer_data failed: %d\n", ret);
- sd = cmd->se_cmd.sense_buffer;
- cmd->se_cmd.scsi_sense_length = 18;
- memset(cmd->se_cmd.sense_buffer, 0,
- cmd->se_cmd.scsi_sense_length);
- sd[0] = 0x70;
- sd[2] = 3;
- sd[7] = 10;
- sd[12] = 8;
- sd[13] = 1;
- }
+ se_tpg = ibmvscsis_make_nexus(&adapter->tport,
+ &adapter->tport.tport_name[0]);
+ if (!se_tpg) {
+ pr_debug("login make nexus fail se_tpg(%p)\n", se_tpg);
+ goto reject;
}
- rsp = &vio_iu(iue)->srp.rsp;
- len = sizeof(*rsp);
- memset(rsp, 0, len);
- data = rsp->data;
+ rsp->opcode = SRP_LOGIN_RSP;
- rsp->tag = se_cmd->tag;
- rsp->req_lim_delta = cpu_to_be32(1);
- rsp->opcode = SRP_RSP;
+ rsp->req_lim_delta = cpu_to_be32(INITIAL_SRP_LIMIT);
- ibmvscsis_determine_resid(se_cmd, rsp);
- rsp->status = se_cmd->scsi_status;
+ pr_debug("process_login, tag:%llu\n", tag);
- if (se_cmd->scsi_sense_length && se_cmd->sense_buffer) {
- rsp->sense_data_len = cpu_to_be32(se_cmd->scsi_sense_length);
- rsp->flags |= SRP_RSP_FLAG_SNSVALID;
- len += se_cmd->scsi_sense_length;
- memcpy(data, se_cmd->sense_buffer, se_cmd->scsi_sense_length);
- }
+ rsp->tag = tag;
+ rsp->max_it_iu_len = cpu_to_be32(sizeof(union srp_iu));
+ rsp->max_ti_iu_len = cpu_to_be32(sizeof(union srp_iu));
+ /* direct and indirect */
+ rsp->buf_fmt = cpu_to_be16(SRP_BUF_FORMAT_DIRECT |
+ SRP_BUF_FORMAT_INDIRECT);
- send_iu(iue, len, VIOSRP_SRP_FORMAT);
- return 0;
+ send_iu(iue, sizeof(*rsp), VIOSRP_SRP_FORMAT);
+ return;
+
+reject:
+ rej->opcode = SRP_LOGIN_REJ;
+ rej->tag = tag;
+ rej->buf_fmt = cpu_to_be16(SRP_BUF_FORMAT_DIRECT |
+ SRP_BUF_FORMAT_INDIRECT);
+
+ send_iu(iue, sizeof(*rej), VIOSRP_SRP_FORMAT);
}
-static int ibmvscsis_queue_status(struct se_cmd *se_cmd)
+static void process_tsk_mgmt(struct ibmvscsis_adapter *adapter,
+ struct iu_entry *iue)
{
- struct ibmvscsis_cmnd *cmd = container_of(se_cmd,
- struct ibmvscsis_cmnd,
- se_cmd);
- struct scsi_cmnd *sc = &cmd->sc;
- struct iu_entry *iue = (struct iu_entry *)sc->SCp.ptr;
+ struct srp_tsk_mgmt *srp_tsk = &vio_iu(iue)->srp.tsk_mgmt;
+ struct ibmvscsis_cmnd *cmd = adapter->cmd;
struct srp_rsp *rsp;
- uint len;
- char *data;
-
- /*
- * Copy any generated SENSE data into sc->sense_buffer and
- * set the appropriate sc->result to be translated by
- * ibmvscsis_cmnd_done()
- */
+ u64 unpacked_lun = 0;
+ u64 tag_to_abort = 0;
+ int tcm_type;
+ int rc = 0;
rsp = &vio_iu(iue)->srp.rsp;
- len = sizeof(*rsp);
- memset(rsp, 0, len);
- data = rsp->data;
-
- rsp->tag = se_cmd->tag;
- rsp->req_lim_delta = cpu_to_be32(1);
- rsp->opcode = SRP_RSP;
-
- ibmvscsis_determine_resid(se_cmd, rsp);
- rsp->status = se_cmd->scsi_status;
+ unpacked_lun = ibmvscsis_unpack_lun((u8 *)&srp_tsk->lun,
+ sizeof(srp_tsk->lun));
- if (se_cmd->scsi_sense_length && se_cmd->sense_buffer) {
- rsp->sense_data_len = cpu_to_be32(se_cmd->scsi_sense_length);
- rsp->flags |= SRP_RSP_FLAG_SNSVALID;
- len += se_cmd->scsi_sense_length;
- memcpy(data, se_cmd->sense_buffer, se_cmd->scsi_sense_length);
+ switch (srp_tsk->tsk_mgmt_func) {
+ case SRP_TSK_ABORT_TASK:
+ tcm_type = TMR_ABORT_TASK;
+ tag_to_abort = be64_to_cpu(srp_tsk->task_tag);
+ srp_iu_put(iue);
+ break;
+ case SRP_TSK_ABORT_TASK_SET:
+ tcm_type = TMR_ABORT_TASK_SET;
+ break;
+ case SRP_TSK_CLEAR_TASK_SET:
+ tcm_type = TMR_CLEAR_TASK_SET;
+ break;
+ case SRP_TSK_LUN_RESET:
+ tcm_type = TMR_LUN_RESET;
+ break;
+ case SRP_TSK_CLEAR_ACA:
+ tcm_type = TMR_CLEAR_ACA;
+ break;
+ default:
+ pr_err("unknown task mgmt func %d\n", srp_tsk->tsk_mgmt_func);
+ cmd->se_cmd.se_tmr_req->response =
+ TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED;
+ goto fail;
}
- send_iu(iue, len, VIOSRP_SRP_FORMAT);
- return 0;
-}
-
-static void ibmvscsis_queue_tm_rsp(struct se_cmd *se_cmd)
-{
- struct ibmvscsis_cmnd *cmd = container_of(se_cmd,
- struct ibmvscsis_cmnd,
- se_cmd);
- struct scsi_cmnd *sc = &cmd->sc;
- struct iu_entry *iue = (struct iu_entry *)sc->SCp.ptr;
- struct srp_target *target = iue->target;
- struct ibmvscsis_adapter *adapter = target->ldata;
- struct srp_rsp *rsp;
- uint len;
- char *data;
- u32 *tsk_status;
- u32 rsp_code;
- rsp = &vio_iu(iue)->srp.rsp;
+ cmd->se_cmd.tag = be64_to_cpu(srp_tsk->tag);
- if (transport_check_aborted_status(se_cmd, false) != 0) {
- pr_debug("queue_tm_rsp aborted\n");
- atomic_inc(&adapter->req_lim_delta);
- srp_iu_put(iue);
- } else {
- rsp->req_lim_delta = cpu_to_be32(1 +
- atomic_xchg(&adapter->
- req_lim_delta, 0));
+ pr_debug("calling submit_tmr, func %d\n",
+ srp_tsk->tsk_mgmt_func);
+ rc = target_submit_tmr(&cmd->se_cmd,
+ adapter->tport.se_sess, NULL,
+ unpacked_lun, srp_tsk, tcm_type,
+ GFP_KERNEL, tag_to_abort,
+ TARGET_SCF_ACK_KREF);
+ if (rc != 0) {
+ pr_err("target_submit_tmr failed, rc %d\n", rc);
+ cmd->se_cmd.se_tmr_req->response = TMR_FUNCTION_REJECTED;
+ goto fail;
}
- len = sizeof(*rsp);
- memset(rsp, 0, len);
- data = rsp->data;
+fail:
+ if (rc)
+ transport_send_check_condition_and_sense(&cmd->se_cmd, 0, 0);
+}
- rsp->opcode = SRP_RSP;
- rsp->tag = se_cmd->se_tmr_req->ref_task_tag;
- rsp->status = 0;
- rsp->resp_data_len = cpu_to_be32(4);
- rsp->flags |= SRP_RSP_FLAG_RSPVALID;
- rsp->req_lim_delta = cpu_to_be32(1);
+static int tcm_queuecommand(struct ibmvscsis_adapter *adapter,
+ struct ibmvscsis_cmnd *vsc,
+ struct srp_cmd *scmd)
+{
+ struct se_cmd *se_cmd;
+ int attr;
+ u64 data_len;
+ int ret;
+ u64 unpacked_lun;
- switch (se_cmd->se_tmr_req->response) {
- case TMR_FUNCTION_COMPLETE:
- case TMR_TASK_DOES_NOT_EXIST:
- rsp_code = SRP_TASK_MANAGEMENT_FUNCTION_COMPLETE;
+ switch (scmd->task_attr) {
+ case SRP_SIMPLE_TASK:
+ attr = TCM_SIMPLE_TAG;
break;
- case TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED:
- case TMR_LUN_DOES_NOT_EXIST:
- rsp_code = SRP_TASK_MANAGEMENT_FUNCTION_NOT_SUPPORTED;
+ case SRP_ORDERED_TASK:
+ attr = TCM_ORDERED_TAG;
break;
- case TMR_FUNCTION_FAILED:
- case TMR_FUNCTION_REJECTED:
- default:
- rsp_code = SRP_TASK_MANAGEMENT_FUNCTION_FAILED;
+ case SRP_HEAD_TASK:
+ attr = TCM_HEAD_TAG;
+ break;
+ case SRP_ACA_TASK:
+ attr = TCM_ACA_TAG;
break;
+ default:
+ pr_err("Task attribute %d not supported\n", scmd->task_attr);
+ attr = TCM_SIMPLE_TAG;
}
- tsk_status = (u32 *)data;
- *tsk_status = cpu_to_be32(rsp_code);
- data = (char *)(tsk_status + 1);
- len += 4;
+ pr_debug("srp_data_length: %llx, srp_direction:%x\n",
+ srp_data_length(scmd, srp_cmd_direction(scmd)),
+ srp_cmd_direction(scmd));
+ data_len = srp_data_length(scmd, srp_cmd_direction(scmd));
- send_iu(iue, len, VIOSRP_SRP_FORMAT);
-}
+ vsc->se_cmd.tag = scmd->tag;
+ se_cmd = &vsc->se_cmd;
-static void ibmvscsis_aborted_task(struct se_cmd *se_cmd)
-{
-}
+ pr_debug("size of lun:%lx, lun:%s\n", sizeof(scmd->lun),
+ &scmd->lun.scsi_lun[0]);
-static struct se_portal_group *ibmvscsis_make_nexus(struct ibmvscsis_tport
- *tport,
- const char *name)
-{
- struct se_node_acl *acl;
+ unpacked_lun = ibmvscsis_unpack_lun((u8 *)&scmd->lun,
+ sizeof(scmd->lun));
- if (tport->se_sess) {
- pr_debug("tport->se_sess already exists\n");
- return &tport->se_tpg;
+ ret = target_submit_cmd(se_cmd, adapter->tport.se_sess,
+ &scmd->cdb[0], &vsc->sense_buf[0], unpacked_lun,
+ data_len, attr, srp_cmd_direction(scmd),
+ TARGET_SCF_ACK_KREF);
+ if (ret != 0) {
+ ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+ pr_debug("tcm_queuecommand fail submit_cmd\n");
+ goto send_sense;
}
+ return 0;
- /*
- * Initialize the struct se_session pointer and setup tagpool
- * for struct ibmvscsis_cmd descriptors
- */
- tport->se_sess = transport_init_session(TARGET_PROT_NORMAL);
- if (IS_ERR(tport->se_sess))
- goto transport_init_fail;
-
- /*
- * Since we are running in 'demo mode' this call will generate a
- * struct se_node_acl for the ibmvscsis struct se_portal_group with
- * the SCSI Initiator port name of the passed configfs group 'name'.
- */
-
- acl = core_tpg_check_initiator_node_acl(&tport->se_tpg,
- (unsigned char *)name);
- if (!acl) {
- pr_debug("core_tpg_check_initiator_node_acl() failed for %s\n",
- name);
- goto acl_failed;
- }
- tport->se_sess->se_node_acl = acl;
+send_sense:
+ transport_send_check_condition_and_sense(&vsc->se_cmd, ret, 0);
+ transport_generic_free_cmd(&vsc->se_cmd, 0);
+ return -1;
+}
- /*
- * Now register the TCM ibmvscsis virtual I_T Nexus as active.
- */
- transport_register_session(&tport->se_tpg,
- tport->se_sess->se_node_acl,
- tport->se_sess, tport);
+static int ibmvscsis_queuecommand(struct ibmvscsis_adapter *adapter,
+ struct iu_entry *iue)
+{
+ struct srp_cmd *cmd = iue->sbuf->buf;
+ struct scsi_cmnd *sc;
+ struct ibmvscsis_cmnd *vsc;
+ int ret;
- tport->se_sess->se_tpg = &tport->se_tpg;
+ vsc = kzalloc(sizeof(*vsc), GFP_KERNEL);
+ adapter->cmd = vsc;
+ sc = &vsc->sc;
+ sc->sense_buffer = vsc->se_cmd.sense_buffer;
+ sc->cmnd = cmd->cdb;
+ sc->SCp.ptr = (char *)iue;
- return &tport->se_tpg;
+ ret = tcm_queuecommand(adapter, vsc, cmd);
-acl_failed:
- transport_free_session(tport->se_sess);
-transport_init_fail:
- kfree(tport);
- return ERR_PTR(-ENOMEM);
+ return ret;
}
-static int ibmvscsis_drop_nexus(struct ibmvscsis_tport *tport)
+static void ibmvscsis_srp_i_logout(struct iu_entry *iue)
{
- struct se_session *se_sess;
-
- se_sess = tport->se_sess;
- if (!se_sess)
- return -ENODEV;
+ union viosrp_iu *iu = vio_iu(iue);
+ struct srp_i_logout *log_out = &vio_iu(iue)->srp.i_logout;
+ u64 tag = iu->srp.rsp.tag;
- transport_deregister_session(tport->se_sess);
- transport_free_session(tport->se_sess);
- return 0;
+ log_out->opcode = SRP_I_LOGOUT;
+ log_out->tag = tag;
+ send_iu(iue, sizeof(*log_out), VIOSRP_SRP_FORMAT);
}
-static struct ibmvscsis_tport *ibmvscsis_lookup_port(const char *name)
+static int process_srp_iu(struct iu_entry *iue)
{
- struct ibmvscsis_tport *tport;
- struct vio_dev *vdev;
- struct ibmvscsis_adapter *adapter;
- int ret;
+ union viosrp_iu *iu = vio_iu(iue);
+ struct srp_target *target = iue->target;
+ struct ibmvscsis_adapter *adapter = target->ldata;
+ u8 opcode = iu->srp.rsp.opcode;
unsigned long flags;
+ int err = 1;
- spin_lock_irqsave(&ibmvscsis_dev_lock, flags);
- list_for_each_entry(adapter, &ibmvscsis_dev_list, list) {
- vdev = adapter->dma_dev;
- ret = strcmp(dev_name(&vdev->dev), name);
- if (ret == 0)
- tport = &adapter->tport;
- if (tport)
- goto found;
- }
- spin_unlock_irqrestore(&ibmvscsis_dev_lock, flags);
- return NULL;
-found:
- spin_unlock_irqrestore(&ibmvscsis_dev_lock, flags);
- return tport;
-}
-
-static struct se_wwn *ibmvscsis_make_tport(struct target_fabric_configfs *tf,
- struct config_group *group,
- const char *name)
-{
- struct ibmvscsis_tport *tport;
- int ret;
-
- tport = ibmvscsis_lookup_port(name);
- ret = -EINVAL;
-
- if (!tport)
- goto err;
-
- tport->tport_proto_id = SCSI_PROTOCOL_SRP;
- pr_debug("make_tport(%s), pointer:%p tport_id:%x\n", name, tport,
- tport->tport_proto_id);
-
- return &tport->tport_wwn;
-err:
- return ERR_PTR(ret);
-}
-
-static void ibmvscsis_drop_tport(struct se_wwn *wwn)
-{
- struct ibmvscsis_tport *tport = container_of(wwn,
- struct ibmvscsis_tport,
- tport_wwn);
-
- pr_debug("drop_tport(%s\n",
- config_item_name(&tport->tport_wwn.wwn_group.cg_item));
-}
-
-static struct se_portal_group *ibmvscsis_make_tpg(struct se_wwn *wwn,
- struct config_group *group,
- const char *name)
-{
- struct ibmvscsis_tport *tport =
- container_of(wwn, struct ibmvscsis_tport, tport_wwn);
- int ret;
-
- tport->releasing = false;
-
- ret = core_tpg_register(&tport->tport_wwn,
- &tport->se_tpg,
- tport->tport_proto_id);
- if (ret)
- return ERR_PTR(ret);
-
- return &tport->se_tpg;
-}
-
-static void ibmvscsis_drop_tpg(struct se_portal_group *se_tpg)
-{
- struct ibmvscsis_tport *tport = container_of(se_tpg,
- struct ibmvscsis_tport,
- se_tpg);
-
- tport->releasing = true;
- tport->enabled = false;
-
- /*
- * Release the virtual I_T Nexus for this ibmvscsis TPG
- */
- ibmvscsis_drop_nexus(tport);
- /*
- * Deregister the se_tpg from TCM..
- */
- core_tpg_deregister(se_tpg);
-}
-
-static ssize_t system_id_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- return snprintf(buf, PAGE_SIZE, "%s\n", system_id);
-}
-
-static ssize_t partition_number_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- return snprintf(buf, PAGE_SIZE, "%x\n", partition_number);
-}
-
-static ssize_t unit_address_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct ibmvscsis_adapter *adapter =
- container_of(dev, struct ibmvscsis_adapter, dev);
-
- return snprintf(buf, PAGE_SIZE, "%x\n", adapter->dma_dev->unit_address);
-}
-
-static int get_system_info(void)
-{
- struct device_node *rootdn, *vdevdn;
- const char *id, *model, *name;
- const unsigned int *num;
-
- rootdn = of_find_node_by_path("/");
- if (!rootdn)
- return -ENOENT;
-
- model = of_get_property(rootdn, "model", NULL);
- id = of_get_property(rootdn, "system-id", NULL);
- if (model && id)
- snprintf(system_id, sizeof(system_id), "%s-%s", model, id);
-
- name = of_get_property(rootdn, "ibm,partition-name", NULL);
- if (name)
- strncpy(partition_name, name, sizeof(partition_name));
-
- num = of_get_property(rootdn, "ibm,partition-no", NULL);
- if (num)
- partition_number = of_read_number(num, 1);
-
- of_node_put(rootdn);
-
- vdevdn = of_find_node_by_path("/vdevice");
- vdevdn = of_find_node_by_path("/vdevice");
- if (vdevdn) {
- const unsigned *mvds;
-
- mvds = of_get_property(vdevdn, "ibm,max-virtual-dma-size",
- NULL);
- if (mvds)
- max_vdma_size = *mvds;
- of_node_put(vdevdn);
- }
-
- return 0;
-};
-
-static irqreturn_t ibmvscsis_interrupt(int dummy, void *data)
-{
- struct ibmvscsis_adapter *adapter = data;
-
- vio_disable_interrupts(adapter->dma_dev);
- queue_work(vtgtd, &adapter->crq_work);
-
- return IRQ_HANDLED;
-}
-
-static int process_srp_iu(struct iu_entry *iue)
-{
- union viosrp_iu *iu = vio_iu(iue);
- struct srp_target *target = iue->target;
- struct ibmvscsis_adapter *adapter = target->ldata;
- u8 opcode = iu->srp.rsp.opcode;
- unsigned long flags;
- int err = 1;
-
- spin_lock_irqsave(&target->lock, flags);
- if (adapter->tport.releasing) {
- pr_err("process_srp_iu error, tport is released:%x\n",
- adapter->tport.releasing);
- goto done;
+ spin_lock_irqsave(&target->lock, flags);
+ if (adapter->tport.releasing) {
+ pr_err("process_srp_iu error, tport is released:%x\n",
+ adapter->tport.releasing);
+ goto done;
}
if (!adapter->tport.enabled) {
pr_err("process_srp_iu, tport not enabled:%x\n",
@@ -1306,6 +1008,29 @@ static void process_crq(struct viosrp_crq *crq,
}
}
+static inline struct viosrp_crq *next_crq(struct crq_queue *queue)
+{
+ struct viosrp_crq *crq;
+ unsigned long flags;
+
+ spin_lock_irqsave(&queue->lock, flags);
+ crq = &queue->msgs[queue->cur];
+ if (crq->valid & 0x80 || crq->valid & 0xFF) {
+ if (++queue->cur == queue->size)
+ queue->cur = 0;
+
+ /* Ensure the read of the valid bit occurs before reading any
+ * other bits of the CRQ entry
+ */
+ rmb();
+ } else {
+ crq = NULL;
+ }
+ spin_unlock_irqrestore(&queue->lock, flags);
+
+ return crq;
+}
+
static void handle_crq(struct work_struct *work)
{
struct ibmvscsis_adapter *adapter =
@@ -1332,623 +1057,815 @@ static void handle_crq(struct work_struct *work)
}
}
-static int ibmvscsis_reset_crq_queue(struct ibmvscsis_adapter *adapter)
+static int crq_queue_create(struct crq_queue *queue,
+ struct ibmvscsis_adapter *adapter)
{
- int rc = 0;
+ int retrc;
+ int err;
struct vio_dev *vdev = adapter->dma_dev;
- struct crq_queue *queue = &adapter->crq_queue;
- /* Close the CRQ */
- h_free_crq(vdev->unit_address);
+ queue->msgs = (struct viosrp_crq *)get_zeroed_page(GFP_KERNEL);
- /* Clean out the queue */
- memset(queue->msgs, 0x00, PAGE_SIZE);
- queue->cur = 0;
+ if (!queue->msgs)
+ goto malloc_failed;
- /* And re-open it again */
- rc = h_reg_crq(vdev->unit_address, queue->msg_token, PAGE_SIZE);
- if (rc == 2)
- /* Adapter is good, but other end is not ready */
- pr_warn("Partner adapter not ready\n");
- else if (rc != 0)
- pr_err("Couldn't register crq--rc 0x%x\n", rc);
+ queue->size = PAGE_SIZE / sizeof(*queue->msgs);
- return rc;
-}
+ queue->msg_token = dma_map_single(&vdev->dev, queue->msgs,
+ queue->size * sizeof(*queue->msgs),
+ DMA_BIDIRECTIONAL);
-static void crq_queue_destroy(struct ibmvscsis_adapter *adapter)
-{
- struct vio_dev *vdev = adapter->dma_dev;
- struct crq_queue *queue = &adapter->crq_queue;
+ if (dma_mapping_error(&vdev->dev, queue->msg_token))
+ goto map_failed;
- free_irq(vdev->irq, (void *)adapter);
- flush_work(&adapter->crq_work);
- h_free_crq(vdev->unit_address);
- dma_unmap_single(&adapter->dma_dev->dev, queue->msg_token,
- queue->size * sizeof(*queue->msgs),
- DMA_BIDIRECTIONAL);
+ err = h_reg_crq(vdev->unit_address, queue->msg_token,
+ PAGE_SIZE);
+ retrc = err;
- free_page((unsigned long)queue->msgs);
-}
+ /* If the adapter was left active for some reason (like kexec)
+ * try freeing and re-registering
+ */
+ if (err == H_RESOURCE)
+ err = ibmvscsis_reset_crq_queue(adapter);
+ if (err == 2) {
+ pr_warn("Partner adapter not ready\n");
+ retrc = 0;
+ } else if (err != 0) {
+ pr_err("Error 0x%x opening virtual adapter\n", err);
+ goto reg_crq_failed;
+ }
-static inline struct viosrp_crq *next_crq(struct crq_queue *queue)
-{
- struct viosrp_crq *crq;
- unsigned long flags;
+ queue->cur = 0;
+ spin_lock_init(&queue->lock);
- spin_lock_irqsave(&queue->lock, flags);
- crq = &queue->msgs[queue->cur];
- if (crq->valid & 0x80 || crq->valid & 0xFF) {
- if (++queue->cur == queue->size)
- queue->cur = 0;
+ INIT_WORK(&adapter->crq_work, handle_crq);
- /* Ensure the read of the valid bit occurs before reading any
- * other bits of the CRQ entry
- */
- rmb();
- } else {
- crq = NULL;
+ err = request_irq(vdev->irq, &ibmvscsis_interrupt,
+ 0, "ibmvscsis", adapter);
+ if (err) {
+ pr_err("Error 0x%x h_send_crq\n", err);
+ goto req_irq_failed;
}
- spin_unlock_irqrestore(&queue->lock, flags);
- return crq;
+ err = vio_enable_interrupts(vdev);
+ if (err != 0) {
+ pr_err("Error %d enabling interrupts!!!\n", err);
+ goto req_irq_failed;
+ }
+
+ return retrc;
+
+req_irq_failed:
+ h_free_crq(vdev->unit_address);
+reg_crq_failed:
+ dma_unmap_single(&vdev->dev, queue->msg_token,
+ queue->size * sizeof(*queue->msgs), DMA_BIDIRECTIONAL);
+map_failed:
+ free_page((unsigned long)queue->msgs);
+malloc_failed:
+ return -1;
}
-static int send_iu(struct iu_entry *iue, u64 length, u8 format)
+static void crq_queue_destroy(struct ibmvscsis_adapter *adapter)
{
- struct srp_target *target = iue->target;
- struct ibmvscsis_adapter *adapter = target->ldata;
- struct ibmvscsis_crq_msg crq_msg;
- struct srp_rsp *rsp;
- __be64 *crq_as_u64 = (__be64 *)&crq_msg;
- long rc, rc1;
+ struct vio_dev *vdev = adapter->dma_dev;
+ struct crq_queue *queue = &adapter->crq_queue;
- rsp = &vio_iu(iue)->srp.rsp;
- pr_debug("send_iu: 0x%lx 0x%lx 0x%lx 0x%lx 0x%lx\n",
- (unsigned long)length,
- (unsigned long)adapter->liobn,
- (unsigned long)iue->sbuf->dma,
- (unsigned long)adapter->riobn,
- (unsigned long)be64_to_cpu(iue->remote_token));
+ free_irq(vdev->irq, (void *)adapter);
+ flush_work(&adapter->crq_work);
+ h_free_crq(vdev->unit_address);
+ dma_unmap_single(&adapter->dma_dev->dev, queue->msg_token,
+ queue->size * sizeof(*queue->msgs),
+ DMA_BIDIRECTIONAL);
- /* First copy the SRP */
- rc = h_copy_rdma(length, adapter->liobn, iue->sbuf->dma,
- adapter->riobn, be64_to_cpu(iue->remote_token));
+ free_page((unsigned long)queue->msgs);
+}
- switch (rc) {
- case H_SUCCESS:
- break;
- case H_PERMISSION:
- case H_SOURCE_PARM:
- case H_DEST_PARM:
- if (connection_broken(adapter)) {
- pr_debug("rdma connection broken\n");
- goto end;
- }
- break;
- default:
- pr_err("Error %ld transferring data\n", rc);
- length = 0;
- break;
- }
+static int ibmvscsis_rdma(struct scsi_cmnd *sc, struct scatterlist *sg, int nsg,
+ struct srp_direct_buf *md, int nmd,
+ enum dma_data_direction dir, unsigned int rest)
+{
+ struct iu_entry *iue = (struct iu_entry *)sc->SCp.ptr;
+ struct srp_target *target = iue->target;
+ struct ibmvscsis_adapter *adapter = target->ldata;
+ dma_addr_t token;
+ long err;
+ unsigned int done = 0;
+ int i, sidx, soff;
- pr_debug("crq pre cooked: 0x%x, 0x%llx, 0x%llx\n",
- format, length, vio_iu(iue)->srp.rsp.tag);
+ sidx = 0;
+ soff = 0;
+ token = sg_dma_address(sg + sidx);
- crq_msg.valid = 0x80;
- crq_msg.format = format;
- crq_msg.rsvd = 0;
- if (rc == 0)
- crq_msg.status = 0x99;
- else
- crq_msg.status = rsp->status;
- crq_msg.rsvd1 = 0;
- crq_msg.IU_length = cpu_to_be16(length);
- crq_msg.IU_data_ptr = vio_iu(iue)->srp.rsp.tag;
+ for (i = 0; i < nmd && rest; i++) {
+ unsigned int mdone, mlen;
- pr_debug("send crq: 0x%x, 0x%llx, 0x%llx\n",
- adapter->dma_dev->unit_address,
- be64_to_cpu(crq_as_u64[0]),
- be64_to_cpu(crq_as_u64[1]));
+ mlen = min(rest, be32_to_cpu(md[i].len));
+ for (mdone = 0; mlen;) {
+ int slen = min(sg_dma_len(sg + sidx) - soff, mlen);
- srp_iu_put(iue);
+ if (dir == DMA_TO_DEVICE)
+ err = h_copy_rdma(slen,
+ adapter->riobn,
+ be64_to_cpu(md[i].va) + mdone,
+ adapter->liobn,
+ token + soff);
+ else
+ err = h_copy_rdma(slen,
+ adapter->liobn,
+ token + soff,
+ adapter->riobn,
+ be64_to_cpu(md[i].va) +
+ mdone);
+ switch (err) {
+ case H_SUCCESS:
+ break;
+ case H_PERMISSION:
+ case H_SOURCE_PARM:
+ case H_DEST_PARM:
+ if (connection_broken(adapter))
+ pr_debug("rdma connection broken\n");
+ default:
+ pr_err("rdma error %d %d %ld\n",
+ dir, slen, err);
+ return -EIO;
+ }
- rc1 = h_send_crq(adapter, be64_to_cpu(crq_as_u64[0]),
- be64_to_cpu(crq_as_u64[1]));
+ mlen -= slen;
+ mdone += slen;
+ soff += slen;
+ done += slen;
- if (rc1) {
- pr_err("%ld sending response\n", rc1);
- return rc1;
+ if (soff == sg_dma_len(sg + sidx)) {
+ sidx++;
+ soff = 0;
+ token = sg_dma_address(sg + sidx);
+
+ if (sidx > nsg) {
+ pr_err("out of sg %p %d %d\n",
+ iue, sidx, nsg);
+ return -EIO;
+ }
+ }
+ }
+ rest -= mlen;
}
- return rc;
-end:
- return rc;
+ return 0;
}
-static int send_adapter_info(struct iu_entry *iue,
- dma_addr_t remote_buffer, u16 length)
+static int ibmvscsis_probe(struct vio_dev *vdev, const struct vio_device_id *id)
{
- struct srp_target *target = iue->target;
- struct ibmvscsis_adapter *adapter = target->ldata;
- dma_addr_t data_token;
- struct viosrp_adapter_info *mad = &vio_iu(iue)->mad.adapter_info;
- struct mad_adapter_info_data *info;
- int err;
+ int ret = -ENOMEM;
+ struct ibmvscsis_adapter *adapter;
+ struct srp_target *target;
+ struct ibmvscsis_tport *tport;
+ unsigned long flags;
- mad->common.status = cpu_to_be16(VIOSRP_MAD_SUCCESS);
+ pr_debug("Probe for UA 0x%x\n", vdev->unit_address);
- if (be16_to_cpu(mad->common.length) > sizeof(*info)) {
- mad->common.status = cpu_to_be16(VIOSRP_MAD_FAILED);
- return 0;
- }
+ adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
+ if (!adapter)
+ return ret;
+ target = kzalloc(sizeof(*target), GFP_KERNEL);
+ if (!target)
+ goto free_adapter;
- info = dma_alloc_coherent(&adapter->dma_dev->dev, sizeof(*info),
- &data_token, GFP_KERNEL);
- if (!info) {
- pr_err("bad dma_alloc_coherent %p\n", target);
- mad->common.status = cpu_to_be16(VIOSRP_MAD_FAILED);
- return 1;
- }
+ adapter->dma_dev = vdev;
+ adapter->target = target;
+ tport = &adapter->tport;
- /* Get remote info */
- err = h_copy_rdma(sizeof(*info), adapter->riobn,
- be64_to_cpu(remote_buffer),
- adapter->liobn, data_token);
+ tport->enabled = false;
+ snprintf(&adapter->tport.tport_name[0], 256, "%s",
+ dev_name(&vdev->dev));
- if (err == H_SUCCESS) {
- pr_err("Client connect: %s (%d)\n",
- info->partition_name, info->partition_number);
+ ret = read_dma_window(adapter->dma_dev, adapter);
+ if (ret != 0)
+ goto free_target;
- if (adapter->client_data.partition_number == 0)
- adapter->client_data.partition_number =
- be32_to_cpu(info->partition_number);
- strncpy(adapter->client_data.srp_version, info->srp_version,
- sizeof(adapter->client_data.srp_version));
- strncpy(adapter->client_data.partition_name,
- info->partition_name,
- sizeof(adapter->client_data.partition_name));
- adapter->client_data.mad_version =
- be32_to_cpu(info->mad_version);
- adapter->client_data.os_type = be32_to_cpu(info->os_type);
- pr_debug("adapter info client adapter %u\n",
- adapter->client_data.os_type);
+ pr_debug("Probe: liobn 0x%x, riobn 0x%x\n", adapter->liobn,
+ adapter->riobn);
- strcpy(info->srp_version, "16.a");
- strncpy(info->partition_name, partition_name,
- sizeof(info->partition_name));
+ spin_lock_irqsave(&ibmvscsis_dev_lock, flags);
+ list_add_tail(&adapter->list, &ibmvscsis_dev_list);
+ spin_unlock_irqrestore(&ibmvscsis_dev_lock, flags);
- info->partition_number = cpu_to_be32(partition_number);
- info->mad_version = cpu_to_be32(1);
- info->os_type = cpu_to_be32(2);
- memset(&info->port_max_txu[0], 0, sizeof(info->port_max_txu));
- info->port_max_txu[0] = cpu_to_be32(SCSI_MAX_SG_SEGMENTS *
- PAGE_SIZE);
+ ret = srp_target_alloc(target, &vdev->dev,
+ INITIAL_SRP_LIMIT,
+ SRP_MAX_IU_LEN);
- dma_rmb();
- /* Send our info to remote */
- err = h_copy_rdma(sizeof(*info), adapter->liobn, data_token,
- adapter->riobn, be64_to_cpu(remote_buffer));
+ adapter->target->ldata = adapter;
- switch (err) {
- case H_SUCCESS:
- break;
- case H_PERMISSION:
- case H_SOURCE_PARM:
- case H_DEST_PARM:
- if (connection_broken(adapter))
- pr_debug("rdma connection broken\n");
- default:
- pr_err("Error sending adapter info %d\n",
- err);
- return -EIO;
- }
- } else {
- pr_err("Error sending adapter info %d\n", err);
- return 1;
+ if (ret) {
+ pr_err("failed target alloc ret: %d\n", ret);
+ goto free_srp_target;
}
- dma_free_coherent(&adapter->dma_dev->dev, sizeof(*info), info,
- data_token);
+ ret = crq_queue_create(&adapter->crq_queue, adapter);
+ if (ret != 0 && ret != H_RESOURCE) {
+ pr_err("failed crq_queue_create ret: %d\n", ret);
+ ret = -1;
+ }
+
+ if (h_send_crq(adapter, 0xC001000000000000LL, 0) != 0 &&
+ ret != H_RESOURCE) {
+ pr_warn("Failed to send CRQ message\n");
+ ret = 0;
+ }
+
+ dev_set_drvdata(&vdev->dev, adapter);
return 0;
+
+free_srp_target:
+ srp_target_free(target);
+free_target:
+ kfree(target);
+free_adapter:
+ kfree(adapter);
+ return ret;
}
-static int process_mad_iu(struct iu_entry *iue)
+static int ibmvscsis_remove(struct vio_dev *dev)
{
- union viosrp_iu *iu = vio_iu(iue);
- struct viosrp_adapter_info *info;
- struct viosrp_host_config *conf;
+ unsigned long flags;
+ struct ibmvscsis_adapter *adapter = dev_get_drvdata(&dev->dev);
+ struct srp_target *target;
- switch (be32_to_cpu(iu->mad.empty_iu.common.type)) {
- case VIOSRP_EMPTY_IU_TYPE:
- pr_err("%s\n", "Unsupported EMPTY MAD IU");
- break;
- case VIOSRP_ERROR_LOG_TYPE:
- pr_err("%s\n", "Unsupported ERROR LOG MAD IU");
- iu->mad.error_log.common.status = 1;
- send_iu(iue, sizeof(iu->mad.error_log), VIOSRP_MAD_FORMAT);
- break;
- case VIOSRP_ADAPTER_INFO_TYPE:
- info = &iu->mad.adapter_info;
- info->common.status = send_adapter_info(iue, info->buffer,
- info->common.length);
- send_iu(iue, sizeof(*info), VIOSRP_MAD_FORMAT);
- break;
- case VIOSRP_HOST_CONFIG_TYPE:
- conf = &iu->mad.host_config;
- conf->common.status = 1;
- send_iu(iue, sizeof(*conf), VIOSRP_MAD_FORMAT);
- break;
- default:
- pr_err("Unknown type %u\n", iu->srp.rsp.opcode);
- iu->mad.empty_iu.common.status =
- cpu_to_be16(VIOSRP_MAD_NOT_SUPPORTED);
- send_iu(iue, sizeof(iu->mad), VIOSRP_MAD_FORMAT);
- break;
- }
+ target = adapter->target;
- return 1;
+ spin_lock_irqsave(&ibmvscsis_dev_lock, flags);
+ list_del(&adapter->list);
+ spin_unlock_irqrestore(&ibmvscsis_dev_lock, flags);
+
+ crq_queue_destroy(adapter);
+ srp_target_free(target);
+
+ kfree(target);
+ kfree(adapter);
+
+ return 0;
}
-static void ibmvscsis_srp_i_logout(struct iu_entry *iue)
+static ssize_t system_id_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
{
- union viosrp_iu *iu = vio_iu(iue);
- struct srp_i_logout *log_out = &vio_iu(iue)->srp.i_logout;
- u64 tag = iu->srp.rsp.tag;
+ return snprintf(buf, PAGE_SIZE, "%s\n", system_id);
+}
- log_out->opcode = SRP_I_LOGOUT;
- log_out->tag = tag;
- send_iu(iue, sizeof(*log_out), VIOSRP_SRP_FORMAT);
+static ssize_t partition_number_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%x\n", partition_number);
}
-static void process_login(struct iu_entry *iue)
+static ssize_t unit_address_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
{
- union viosrp_iu *iu = vio_iu(iue);
- struct srp_login_rsp *rsp = &iu->srp.login_rsp;
- struct srp_login_rej *rej = &iu->srp.login_rej;
- struct srp_target *target = iue->target;
- struct ibmvscsis_adapter *adapter = target->ldata;
- struct vio_dev *vdev = adapter->dma_dev;
- struct se_portal_group *se_tpg;
- char name[16];
- u64 tag = iu->srp.rsp.tag;
+ struct ibmvscsis_adapter *adapter =
+ container_of(dev, struct ibmvscsis_adapter, dev);
- /*
- * TODO handle case that requested size is wrong and buffer
- * format is wrong
- */
- memset(iu, 0, max(sizeof(*rsp), sizeof(*rej)));
+ return snprintf(buf, PAGE_SIZE, "%x\n", adapter->dma_dev->unit_address);
+}
- snprintf(name, sizeof(name), "%x", vdev->unit_address);
+static int get_system_info(void)
+{
+ struct device_node *rootdn, *vdevdn;
+ const char *id, *model, *name;
+ const unsigned int *num;
- if (!adapter->tport.enabled) {
- rej->reason = cpu_to_be32(SRP_LOGIN_REJ_INSUFFICIENT_RESOURCES);
- pr_err("Rejected SRP_LOGIN_REQ because target %s has not yet been enabled",
- name);
- goto reject;
- }
+ rootdn = of_find_node_by_path("/");
+ if (!rootdn)
+ return -ENOENT;
- se_tpg = ibmvscsis_make_nexus(&adapter->tport,
- &adapter->tport.tport_name[0]);
- if (!se_tpg) {
- pr_debug("login make nexus fail se_tpg(%p)\n", se_tpg);
- goto reject;
- }
+ model = of_get_property(rootdn, "model", NULL);
+ id = of_get_property(rootdn, "system-id", NULL);
+ if (model && id)
+ snprintf(system_id, sizeof(system_id), "%s-%s", model, id);
- rsp->opcode = SRP_LOGIN_RSP;
+ name = of_get_property(rootdn, "ibm,partition-name", NULL);
+ if (name)
+ strncpy(partition_name, name, sizeof(partition_name));
- rsp->req_lim_delta = cpu_to_be32(INITIAL_SRP_LIMIT);
+ num = of_get_property(rootdn, "ibm,partition-no", NULL);
+ if (num)
+ partition_number = of_read_number(num, 1);
- pr_debug("process_login, tag:%llu\n", tag);
+ of_node_put(rootdn);
- rsp->tag = tag;
- rsp->max_it_iu_len = cpu_to_be32(sizeof(union srp_iu));
- rsp->max_ti_iu_len = cpu_to_be32(sizeof(union srp_iu));
- /* direct and indirect */
- rsp->buf_fmt = cpu_to_be16(SRP_BUF_FORMAT_DIRECT |
- SRP_BUF_FORMAT_INDIRECT);
+ vdevdn = of_find_node_by_path("/vdevice");
+ vdevdn = of_find_node_by_path("/vdevice");
+ if (vdevdn) {
+ const unsigned *mvds;
- send_iu(iue, sizeof(*rsp), VIOSRP_SRP_FORMAT);
- return;
+ mvds = of_get_property(vdevdn, "ibm,max-virtual-dma-size",
+ NULL);
+ if (mvds)
+ max_vdma_size = *mvds;
+ of_node_put(vdevdn);
+ }
-reject:
- rej->opcode = SRP_LOGIN_REJ;
- rej->tag = tag;
- rej->buf_fmt = cpu_to_be16(SRP_BUF_FORMAT_DIRECT |
- SRP_BUF_FORMAT_INDIRECT);
+ return 0;
+};
- send_iu(iue, sizeof(*rej), VIOSRP_SRP_FORMAT);
+static char *ibmvscsis_get_fabric_name(void)
+{
+ return "ibmvscsis";
}
-static void process_tsk_mgmt(struct ibmvscsis_adapter *adapter,
- struct iu_entry *iue)
+static char *ibmvscsis_get_fabric_wwn(struct se_portal_group *se_tpg)
{
- struct srp_tsk_mgmt *srp_tsk = &vio_iu(iue)->srp.tsk_mgmt;
- struct ibmvscsis_cmnd *cmd = adapter->cmd;
- struct srp_rsp *rsp;
- u64 unpacked_lun = 0;
- u64 tag_to_abort = 0;
- int tcm_type;
- int rc = 0;
-
- rsp = &vio_iu(iue)->srp.rsp;
- unpacked_lun = ibmvscsis_unpack_lun((u8 *)&srp_tsk->lun,
- sizeof(srp_tsk->lun));
+ struct ibmvscsis_tport *tport =
+ container_of(se_tpg, struct ibmvscsis_tport, se_tpg);
- switch (srp_tsk->tsk_mgmt_func) {
- case SRP_TSK_ABORT_TASK:
- tcm_type = TMR_ABORT_TASK;
- tag_to_abort = be64_to_cpu(srp_tsk->task_tag);
- srp_iu_put(iue);
- break;
- case SRP_TSK_ABORT_TASK_SET:
- tcm_type = TMR_ABORT_TASK_SET;
- break;
- case SRP_TSK_CLEAR_TASK_SET:
- tcm_type = TMR_CLEAR_TASK_SET;
- break;
- case SRP_TSK_LUN_RESET:
- tcm_type = TMR_LUN_RESET;
- break;
- case SRP_TSK_CLEAR_ACA:
- tcm_type = TMR_CLEAR_ACA;
- break;
- default:
- pr_err("unknown task mgmt func %d\n", srp_tsk->tsk_mgmt_func);
- cmd->se_cmd.se_tmr_req->response =
- TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED;
- goto fail;
- }
+ return &tport->tport_name[0];
+}
- cmd->se_cmd.tag = be64_to_cpu(srp_tsk->tag);
+static u16 ibmvscsis_get_tag(struct se_portal_group *se_tpg)
+{
+ struct ibmvscsis_tport *tport =
+ container_of(se_tpg, struct ibmvscsis_tport, se_tpg);
- pr_debug("calling submit_tmr, func %d\n",
- srp_tsk->tsk_mgmt_func);
- rc = target_submit_tmr(&cmd->se_cmd,
- adapter->tport.se_sess, NULL,
- unpacked_lun, srp_tsk, tcm_type,
- GFP_KERNEL, tag_to_abort,
- TARGET_SCF_ACK_KREF);
- if (rc != 0) {
- pr_err("target_submit_tmr failed, rc %d\n", rc);
- cmd->se_cmd.se_tmr_req->response = TMR_FUNCTION_REJECTED;
- goto fail;
- }
+ return tport->tport_tpgt;
+}
-fail:
- if (rc)
- transport_send_check_condition_and_sense(&cmd->se_cmd, 0, 0);
+static u32 ibmvscsis_get_default_depth(struct se_portal_group *se_tpg)
+{
+ return 1;
}
-static bool connection_broken(struct ibmvscsis_adapter *adapter)
+static int ibmvscsis_check_true(struct se_portal_group *se_tpg)
{
- u64 buffer[2];
- struct viosrp_crq *crq;
- long h_return_code;
- bool rc = false;
+ return 1;
+}
- /* create a PING crq */
- crq = (struct viosrp_crq *)&buffer;
- buffer[0] = 0;
- buffer[1] = 0;
- crq->valid = 0x80;
- crq->format = 6;
- crq->status = 0xF5;
-
- h_return_code = h_send_crq(adapter,
- cpu_to_be64(buffer[0]),
- cpu_to_be64(buffer[1]));
+static int ibmvscsis_check_false(struct se_portal_group *se_tpg)
+{
+ return 0;
+}
- pr_debug("connection_broken: rc %ld\n", h_return_code);
+static u32 ibmvscsis_tpg_get_inst_index(struct se_portal_group *se_tpg)
+{
+ return 1;
+}
- if (h_return_code == H_CLOSED)
- rc = true;
+static int ibmvscsis_check_stop_free(struct se_cmd *se_cmd)
+{
+ struct ibmvscsis_cmnd *cmd = container_of(se_cmd,
+ struct ibmvscsis_cmnd,
+ se_cmd);
- return rc;
+ return target_put_sess_cmd(&cmd->se_cmd);
}
-static int ibmvscsis_rdma(struct scsi_cmnd *sc, struct scatterlist *sg, int nsg,
- struct srp_direct_buf *md, int nmd,
- enum dma_data_direction dir, unsigned int rest)
+static void ibmvscsis_release_cmd(struct se_cmd *se_cmd)
{
- struct iu_entry *iue = (struct iu_entry *)sc->SCp.ptr;
- struct srp_target *target = iue->target;
- struct ibmvscsis_adapter *adapter = target->ldata;
- dma_addr_t token;
- long err;
- unsigned int done = 0;
- int i, sidx, soff;
+ struct ibmvscsis_cmnd *cmd =
+ container_of(se_cmd, struct ibmvscsis_cmnd, se_cmd);
- sidx = 0;
- soff = 0;
- token = sg_dma_address(sg + sidx);
+ kfree(cmd);
+}
- for (i = 0; i < nmd && rest; i++) {
- unsigned int mdone, mlen;
+static int ibmvscsis_shutdown_session(struct se_session *se_sess)
+{
+ return 0;
+}
- mlen = min(rest, be32_to_cpu(md[i].len));
- for (mdone = 0; mlen;) {
- int slen = min(sg_dma_len(sg + sidx) - soff, mlen);
+static void ibmvscsis_close_session(struct se_session *se_sess)
+{
+}
- if (dir == DMA_TO_DEVICE)
- err = h_copy_rdma(slen,
- adapter->riobn,
- be64_to_cpu(md[i].va) + mdone,
- adapter->liobn,
- token + soff);
- else
- err = h_copy_rdma(slen,
- adapter->liobn,
- token + soff,
- adapter->riobn,
- be64_to_cpu(md[i].va) +
- mdone);
- switch (err) {
- case H_SUCCESS:
- break;
- case H_PERMISSION:
- case H_SOURCE_PARM:
- case H_DEST_PARM:
- if (connection_broken(adapter))
- pr_debug("rdma connection broken\n");
- default:
- pr_err("rdma error %d %d %ld\n",
- dir, slen, err);
- return -EIO;
- }
+static u32 ibmvscsis_sess_get_index(struct se_session *se_sess)
+{
+ return 0;
+}
- mlen -= slen;
- mdone += slen;
- soff += slen;
- done += slen;
+static int ibmvscsis_write_pending(struct se_cmd *se_cmd)
+{
+ struct ibmvscsis_cmnd *cmd = container_of(se_cmd,
+ struct ibmvscsis_cmnd,
+ se_cmd);
+ struct scsi_cmnd *sc = &cmd->sc;
+ struct iu_entry *iue = (struct iu_entry *)sc->SCp.ptr;
+ int ret;
- if (soff == sg_dma_len(sg + sidx)) {
- sidx++;
- soff = 0;
- token = sg_dma_address(sg + sidx);
+ sc->sdb.length = se_cmd->data_length;
+ sc->sdb.table.nents = se_cmd->t_data_nents;
+ sc->sdb.table.sgl = se_cmd->t_data_sg;
- if (sidx > nsg) {
- pr_err("out of sg %p %d %d\n",
- iue, sidx, nsg);
- return -EIO;
- }
- }
- }
- rest -= mlen;
+ ret = srp_transfer_data(sc, &vio_iu(iue)->srp.cmd,
+ ibmvscsis_rdma, 1, 1);
+ if (ret) {
+ pr_err("srp_transfer_data() failed: %d\n", ret);
+ return -EAGAIN;
}
+ /*
+ * We now tell TCM to add this WRITE CDB directly into the TCM storage
+ * object execution queue.
+ */
+ target_execute_cmd(&cmd->se_cmd);
return 0;
}
-static int ibmvscsis_queuecommand(struct ibmvscsis_adapter *adapter,
- struct iu_entry *iue)
+static int ibmvscsis_write_pending_status(struct se_cmd *se_cmd)
{
- struct srp_cmd *cmd = iue->sbuf->buf;
- struct scsi_cmnd *sc;
- struct ibmvscsis_cmnd *vsc;
- int ret;
-
- vsc = kzalloc(sizeof(*vsc), GFP_KERNEL);
- adapter->cmd = vsc;
- sc = &vsc->sc;
- sc->sense_buffer = vsc->se_cmd.sense_buffer;
- sc->cmnd = cmd->cdb;
- sc->SCp.ptr = (char *)iue;
+ return 0;
+}
- ret = tcm_queuecommand(adapter, vsc, cmd);
+static void ibmvscsis_set_default_node_attrs(struct se_node_acl *nacl)
+{
+}
- return ret;
+static int ibmvscsis_get_cmd_state(struct se_cmd *se_cmd)
+{
+ return 0;
}
-static u64 ibmvscsis_unpack_lun(const u8 *lun, int len)
+static int ibmvscsis_queue_data_in(struct se_cmd *se_cmd)
{
- u64 res = NO_SUCH_LUN;
- int addressing_method;
+ struct ibmvscsis_cmnd *cmd = container_of(se_cmd,
+ struct ibmvscsis_cmnd,
+ se_cmd);
+ struct scsi_cmnd *sc = &cmd->sc;
+ struct iu_entry *iue = (struct iu_entry *)sc->SCp.ptr;
+ struct srp_cmd *srp = (struct srp_cmd *)iue->sbuf->buf;
+ struct srp_rsp *rsp;
+ char *sd;
+ char *data;
+ int ret;
+ uint len;
- if (unlikely(len < 2)) {
- pr_err("Illegal LUN length %d, expected 2 bytes or more\n",
- len);
- goto out;
- }
+ struct srp_target *target = iue->target;
+ struct ibmvscsis_adapter *adapter = target->ldata;
- switch (len) {
- case 8:
- if ((*((__be64 *)lun) & cpu_to_be64(0x0000FFFFFFFFFFFFLL)) != 0)
- goto out_err;
- break;
- case 4:
- if (*((__be16 *)&lun[2]) != 0)
- goto out_err;
- break;
- case 6:
- if (*((__be32 *)&lun[2]) != 0)
- goto out_err;
- break;
- case 2:
- break;
- default:
- goto out_err;
+ /*
+ * Check for overflow residual count
+ */
+
+ if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT)
+ scsi_set_resid(sc, se_cmd->residual_count);
+
+ sc->sdb.length = se_cmd->data_length;
+ sc->sdb.table.nents = se_cmd->t_data_nents;
+ sc->sdb.table.sgl = se_cmd->t_data_sg;
+
+ if (scsi_sg_count(sc)) {
+ if (srp->cdb[0] == REPORT_LUNS &&
+ adapter->client_data.os_type != LINUX)
+ ibmvscsis_modify_rep_luns(se_cmd);
+ if ((srp->cdb[0] == INQUIRY) && ((srp->cdb[1] & 0x1) == 0))
+ ibmvscsis_modify_std_inquiry(se_cmd);
+ ret = srp_transfer_data(sc, &vio_iu(iue)->srp.cmd,
+ ibmvscsis_rdma, 1, 1);
+ if (ret) {
+ pr_err("srp_transfer_data failed: %d\n", ret);
+ sd = cmd->se_cmd.sense_buffer;
+ cmd->se_cmd.scsi_sense_length = 18;
+ memset(cmd->se_cmd.sense_buffer, 0,
+ cmd->se_cmd.scsi_sense_length);
+ sd[0] = 0x70;
+ sd[2] = 3;
+ sd[7] = 10;
+ sd[12] = 8;
+ sd[13] = 1;
+ }
}
- addressing_method = (*lun) >> 6; /* highest two bits of byte 0 */
- switch (addressing_method) {
- case SCSI_LUN_ADDR_METHOD_PERIPHERAL:
- case SCSI_LUN_ADDR_METHOD_FLAT:
- case SCSI_LUN_ADDR_METHOD_LUN:
- res = *(lun + 1) | (((*lun) & 0x3f) << 8);
- break;
+ rsp = &vio_iu(iue)->srp.rsp;
+ len = sizeof(*rsp);
+ memset(rsp, 0, len);
+ data = rsp->data;
- case SCSI_LUN_ADDR_METHOD_EXTENDED_LUN:
- default:
- pr_err("Unimplemented LUN addressing method %u\n",
- addressing_method);
- break;
+ rsp->tag = se_cmd->tag;
+ rsp->req_lim_delta = cpu_to_be32(1);
+ rsp->opcode = SRP_RSP;
+
+ ibmvscsis_determine_resid(se_cmd, rsp);
+ rsp->status = se_cmd->scsi_status;
+
+ if (se_cmd->scsi_sense_length && se_cmd->sense_buffer) {
+ rsp->sense_data_len = cpu_to_be32(se_cmd->scsi_sense_length);
+ rsp->flags |= SRP_RSP_FLAG_SNSVALID;
+ len += se_cmd->scsi_sense_length;
+ memcpy(data, se_cmd->sense_buffer, se_cmd->scsi_sense_length);
}
-out:
- return res;
-out_err:
- pr_err("Support for multi-level LUNs has not yet been implemented\n");
- goto out;
+ send_iu(iue, len, VIOSRP_SRP_FORMAT);
+ return 0;
}
-static int tcm_queuecommand(struct ibmvscsis_adapter *adapter,
- struct ibmvscsis_cmnd *vsc,
- struct srp_cmd *scmd)
+static int ibmvscsis_queue_status(struct se_cmd *se_cmd)
{
- struct se_cmd *se_cmd;
- int attr;
- u64 data_len;
- int ret;
- u64 unpacked_lun;
+ struct ibmvscsis_cmnd *cmd = container_of(se_cmd,
+ struct ibmvscsis_cmnd,
+ se_cmd);
+ struct scsi_cmnd *sc = &cmd->sc;
+ struct iu_entry *iue = (struct iu_entry *)sc->SCp.ptr;
+ struct srp_rsp *rsp;
+ uint len;
+ char *data;
- switch (scmd->task_attr) {
- case SRP_SIMPLE_TASK:
- attr = TCM_SIMPLE_TAG;
- break;
- case SRP_ORDERED_TASK:
- attr = TCM_ORDERED_TAG;
- break;
- case SRP_HEAD_TASK:
- attr = TCM_HEAD_TAG;
+ /*
+ * Copy any generated SENSE data into sc->sense_buffer and
+ * set the appropriate sc->result to be translated by
+ * ibmvscsis_cmnd_done()
+ */
+
+ rsp = &vio_iu(iue)->srp.rsp;
+ len = sizeof(*rsp);
+ memset(rsp, 0, len);
+ data = rsp->data;
+
+ rsp->tag = se_cmd->tag;
+ rsp->req_lim_delta = cpu_to_be32(1);
+ rsp->opcode = SRP_RSP;
+
+ ibmvscsis_determine_resid(se_cmd, rsp);
+ rsp->status = se_cmd->scsi_status;
+
+ if (se_cmd->scsi_sense_length && se_cmd->sense_buffer) {
+ rsp->sense_data_len = cpu_to_be32(se_cmd->scsi_sense_length);
+ rsp->flags |= SRP_RSP_FLAG_SNSVALID;
+ len += se_cmd->scsi_sense_length;
+ memcpy(data, se_cmd->sense_buffer, se_cmd->scsi_sense_length);
+ }
+ send_iu(iue, len, VIOSRP_SRP_FORMAT);
+ return 0;
+}
+
+static void ibmvscsis_queue_tm_rsp(struct se_cmd *se_cmd)
+{
+ struct ibmvscsis_cmnd *cmd = container_of(se_cmd,
+ struct ibmvscsis_cmnd,
+ se_cmd);
+ struct scsi_cmnd *sc = &cmd->sc;
+ struct iu_entry *iue = (struct iu_entry *)sc->SCp.ptr;
+ struct srp_target *target = iue->target;
+ struct ibmvscsis_adapter *adapter = target->ldata;
+ struct srp_rsp *rsp;
+ uint len;
+ char *data;
+ u32 *tsk_status;
+ u32 rsp_code;
+
+ rsp = &vio_iu(iue)->srp.rsp;
+
+ if (transport_check_aborted_status(se_cmd, false) != 0) {
+ pr_debug("queue_tm_rsp aborted\n");
+ atomic_inc(&adapter->req_lim_delta);
+ srp_iu_put(iue);
+ } else {
+ rsp->req_lim_delta = cpu_to_be32(1 +
+ atomic_xchg(&adapter->
+ req_lim_delta, 0));
+ }
+
+ len = sizeof(*rsp);
+ memset(rsp, 0, len);
+ data = rsp->data;
+
+ rsp->opcode = SRP_RSP;
+ rsp->tag = se_cmd->se_tmr_req->ref_task_tag;
+ rsp->status = 0;
+ rsp->resp_data_len = cpu_to_be32(4);
+ rsp->flags |= SRP_RSP_FLAG_RSPVALID;
+ rsp->req_lim_delta = cpu_to_be32(1);
+
+ switch (se_cmd->se_tmr_req->response) {
+ case TMR_FUNCTION_COMPLETE:
+ case TMR_TASK_DOES_NOT_EXIST:
+ rsp_code = SRP_TASK_MANAGEMENT_FUNCTION_COMPLETE;
break;
- case SRP_ACA_TASK:
- attr = TCM_ACA_TAG;
+ case TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED:
+ case TMR_LUN_DOES_NOT_EXIST:
+ rsp_code = SRP_TASK_MANAGEMENT_FUNCTION_NOT_SUPPORTED;
break;
+ case TMR_FUNCTION_FAILED:
+ case TMR_FUNCTION_REJECTED:
default:
- pr_err("Task attribute %d not supported\n", scmd->task_attr);
- attr = TCM_SIMPLE_TAG;
+ rsp_code = SRP_TASK_MANAGEMENT_FUNCTION_FAILED;
+ break;
}
- pr_debug("srp_data_length: %llx, srp_direction:%x\n",
- srp_data_length(scmd, srp_cmd_direction(scmd)),
- srp_cmd_direction(scmd));
- data_len = srp_data_length(scmd, srp_cmd_direction(scmd));
+ tsk_status = (u32 *)data;
+ *tsk_status = cpu_to_be32(rsp_code);
+ data = (char *)(tsk_status + 1);
+ len += 4;
- vsc->se_cmd.tag = scmd->tag;
- se_cmd = &vsc->se_cmd;
+ send_iu(iue, len, VIOSRP_SRP_FORMAT);
+}
- pr_debug("size of lun:%lx, lun:%s\n", sizeof(scmd->lun),
- &scmd->lun.scsi_lun[0]);
+static void ibmvscsis_aborted_task(struct se_cmd *se_cmd)
+{
+}
- unpacked_lun = ibmvscsis_unpack_lun((u8 *)&scmd->lun,
- sizeof(scmd->lun));
+static struct se_wwn *ibmvscsis_make_tport(struct target_fabric_configfs *tf,
+ struct config_group *group,
+ const char *name)
+{
+ struct ibmvscsis_tport *tport;
+ int ret;
- ret = target_submit_cmd(se_cmd, adapter->tport.se_sess,
- &scmd->cdb[0], &vsc->sense_buf[0], unpacked_lun,
- data_len, attr, srp_cmd_direction(scmd),
- TARGET_SCF_ACK_KREF);
- if (ret != 0) {
- ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
- pr_debug("tcm_queuecommand fail submit_cmd\n");
- goto send_sense;
+ tport = ibmvscsis_lookup_port(name);
+ ret = -EINVAL;
+
+ if (!tport)
+ goto err;
+
+ tport->tport_proto_id = SCSI_PROTOCOL_SRP;
+ pr_debug("make_tport(%s), pointer:%p tport_id:%x\n", name, tport,
+ tport->tport_proto_id);
+
+ return &tport->tport_wwn;
+err:
+ return ERR_PTR(ret);
+}
+
+static void ibmvscsis_drop_tport(struct se_wwn *wwn)
+{
+ struct ibmvscsis_tport *tport = container_of(wwn,
+ struct ibmvscsis_tport,
+ tport_wwn);
+
+ pr_debug("drop_tport(%s\n",
+ config_item_name(&tport->tport_wwn.wwn_group.cg_item));
+}
+
+static struct se_portal_group *ibmvscsis_make_tpg(struct se_wwn *wwn,
+ struct config_group *group,
+ const char *name)
+{
+ struct ibmvscsis_tport *tport =
+ container_of(wwn, struct ibmvscsis_tport, tport_wwn);
+ int ret;
+
+ tport->releasing = false;
+
+ ret = core_tpg_register(&tport->tport_wwn,
+ &tport->se_tpg,
+ tport->tport_proto_id);
+ if (ret)
+ return ERR_PTR(ret);
+
+ return &tport->se_tpg;
+}
+
+static void ibmvscsis_drop_tpg(struct se_portal_group *se_tpg)
+{
+ struct ibmvscsis_tport *tport = container_of(se_tpg,
+ struct ibmvscsis_tport,
+ se_tpg);
+
+ tport->releasing = true;
+ tport->enabled = false;
+
+ /*
+ * Release the virtual I_T Nexus for this ibmvscsis TPG
+ */
+ ibmvscsis_drop_nexus(tport);
+ /*
+ * Deregister the se_tpg from TCM..
+ */
+ core_tpg_deregister(se_tpg);
+}
+
+static ssize_t ibmvscsis_wwn_version_show(struct config_item *item,
+ char *page)
+{
+ return scnprintf(page, PAGE_SIZE, "%s\n", IBMVSCSIS_VERSION);
+}
+CONFIGFS_ATTR_RO(ibmvscsis_wwn_, version);
+
+static struct configfs_attribute *ibmvscsis_wwn_attrs[] = {
+ &ibmvscsis_wwn_attr_version,
+ NULL,
+};
+
+static ssize_t ibmvscsis_tpg_enable_show(struct config_item *item,
+ char *page)
+{
+ struct se_portal_group *se_tpg = to_tpg(item);
+ struct ibmvscsis_tport *tport = container_of(se_tpg,
+ struct ibmvscsis_tport,
+ se_tpg);
+
+ return snprintf(page, PAGE_SIZE, "%d\n", (tport->enabled) ? 1 : 0);
+}
+
+static ssize_t ibmvscsis_tpg_enable_store(struct config_item *item,
+ const char *page, size_t count)
+{
+ struct se_portal_group *se_tpg = to_tpg(item);
+ struct ibmvscsis_tport *tport = container_of(se_tpg,
+ struct ibmvscsis_tport,
+ se_tpg);
+ unsigned long tmp;
+ int ret;
+
+ ret = kstrtoul(page, 0, &tmp);
+ if (ret < 0) {
+ pr_err("Unable to extract ibmvscsis_tpg_store_enable\n");
+ return -EINVAL;
}
- return 0;
-send_sense:
- transport_send_check_condition_and_sense(&vsc->se_cmd, ret, 0);
- transport_generic_free_cmd(&vsc->se_cmd, 0);
- return -1;
+ if ((tmp != 0) && (tmp != 1)) {
+ pr_err("Illegal value for ibmvscsis_tpg_store_enable: %lu\n",
+ tmp);
+ return -EINVAL;
+ }
+
+ if (tmp == 1)
+ tport->enabled = true;
+ else
+ tport->enabled = false;
+
+ return count;
}
+CONFIGFS_ATTR(ibmvscsis_tpg_, enable);
+
+static struct configfs_attribute *ibmvscsis_tpg_attrs[] = {
+ &ibmvscsis_tpg_attr_enable,
+ NULL,
+};
+
+static const struct target_core_fabric_ops ibmvscsis_ops = {
+ .module = THIS_MODULE,
+ .name = "ibmvscsis",
+ .max_data_sg_nents = SCSI_MAX_SG_SEGMENTS,
+ .get_fabric_name = ibmvscsis_get_fabric_name,
+ .tpg_get_wwn = ibmvscsis_get_fabric_wwn,
+ .tpg_get_tag = ibmvscsis_get_tag,
+ .tpg_get_default_depth = ibmvscsis_get_default_depth,
+ .tpg_check_demo_mode = ibmvscsis_check_true,
+ .tpg_check_demo_mode_cache = ibmvscsis_check_true,
+ .tpg_check_demo_mode_write_protect = ibmvscsis_check_false,
+ .tpg_check_prod_mode_write_protect = ibmvscsis_check_false,
+ .tpg_get_inst_index = ibmvscsis_tpg_get_inst_index,
+ .check_stop_free = ibmvscsis_check_stop_free,
+ .release_cmd = ibmvscsis_release_cmd,
+ .shutdown_session = ibmvscsis_shutdown_session,
+ .close_session = ibmvscsis_close_session,
+ .sess_get_index = ibmvscsis_sess_get_index,
+ .write_pending = ibmvscsis_write_pending,
+ .write_pending_status = ibmvscsis_write_pending_status,
+ .set_default_node_attributes = ibmvscsis_set_default_node_attrs,
+ .get_cmd_state = ibmvscsis_get_cmd_state,
+ .queue_data_in = ibmvscsis_queue_data_in,
+ .queue_status = ibmvscsis_queue_status,
+ .queue_tm_rsp = ibmvscsis_queue_tm_rsp,
+ .aborted_task = ibmvscsis_aborted_task,
+ /*
+ * Setup function pointers for logic in target_cor_fabric_configfs.c
+ */
+ .fabric_make_wwn = ibmvscsis_make_tport,
+ .fabric_drop_wwn = ibmvscsis_drop_tport,
+ .fabric_make_tpg = ibmvscsis_make_tpg,
+ .fabric_drop_tpg = ibmvscsis_drop_tpg,
+
+ .tfc_wwn_attrs = ibmvscsis_wwn_attrs,
+ .tfc_tpg_base_attrs = ibmvscsis_tpg_attrs,
+};
+
+static void ibmvscsis_dev_release(struct device *dev) {};
+
+static struct class_attribute ibmvscsis_class_attrs[] = {
+ __ATTR_NULL,
+};
+
+static struct device_attribute dev_attr_system_id =
+ __ATTR(system_id, S_IRUGO, system_id_show, NULL);
+
+static struct device_attribute dev_attr_partition_number =
+ __ATTR(partition_number, S_IRUGO, partition_number_show, NULL);
+
+static struct device_attribute dev_attr_unit_address =
+ __ATTR(unit_address, S_IRUGO, unit_address_show, NULL);
+
+static struct attribute *ibmvscsis_dev_attrs[] = {
+ &dev_attr_system_id.attr,
+ &dev_attr_partition_number.attr,
+ &dev_attr_unit_address.attr,
+};
+ATTRIBUTE_GROUPS(ibmvscsis_dev);
+
+static struct class ibmvscsis_class = {
+ .name = "ibmvscsis",
+ .dev_release = ibmvscsis_dev_release,
+ .class_attrs = ibmvscsis_class_attrs,
+ .dev_groups = ibmvscsis_dev_groups,
+};
+
+static struct vio_device_id ibmvscsis_device_table[] = {
+ {"v-scsi-host", "IBM,v-scsi-host"},
+ {"", ""}
+};
+MODULE_DEVICE_TABLE(vio, ibmvscsis_device_table);
+
+static struct vio_driver ibmvscsis_driver = {
+ .name = ibmvscsis_driver_name,
+ .id_table = ibmvscsis_device_table,
+ .probe = ibmvscsis_probe,
+ .remove = ibmvscsis_remove,
+};
/*
* ibmvscsis_init() - Kernel Module initialization
--
2.5.4 (Apple Git-61)
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