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Message-Id: <1464185854-19761-2-git-send-email-bryantly@linux.vnet.ibm.com>
Date: Wed, 25 May 2016 09:17:33 -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 2/3] ibmvscsis: Addressing Bart's comments
From: bryantly <bryantly@...ux.vnet.ibm.com>
This patch contains cleaning up the code for styling and also addresses Bart's comments.
Signed-off-by: bryantly <bryantly@...ux.vnet.ibm.com>
---
MAINTAINERS | 4 +-
drivers/scsi/Kconfig | 36 +--
drivers/scsi/Makefile | 4 +-
drivers/scsi/ibmvscsi/Makefile | 3 +-
drivers/scsi/ibmvscsi/ibmvscsis.c | 450 ++++++++++++++++++--------------------
drivers/scsi/ibmvscsi/ibmvscsis.h | 40 ++--
drivers/scsi/ibmvscsi/libsrp.c | 386 ++++++++++++++++++++++++++++++++
drivers/scsi/ibmvscsi/libsrp.h | 91 ++++++++
drivers/scsi/libsrp.c | 387 --------------------------------
include/scsi/libsrp.h | 95 --------
10 files changed, 737 insertions(+), 759 deletions(-)
create mode 100644 drivers/scsi/ibmvscsi/libsrp.c
create mode 100644 drivers/scsi/ibmvscsi/libsrp.h
delete mode 100644 drivers/scsi/libsrp.c
delete mode 100644 include/scsi/libsrp.h
diff --git a/MAINTAINERS b/MAINTAINERS
index b520e6c..a11905c 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -5387,9 +5387,9 @@ L: linux-scsi@...r.kernel.org
L: target-devel@...r.kernel.org
S: Supported
F: drivers/scsi/ibmvscsi/ibmvscsis.c
-F: drivers/scsi/ibmvscsi/ibmvscsis.h
+F: drivers/scsi/ibmvscsi/ibmvscsis.h
F: drivers/scsi/libsrp.h
-F: drivers/scsi/libsrp.c
+F: drivers/scsi/libsrp.c
IBM Power Virtual FC Device Drivers
M: Tyrel Datwyler <tyreld@...ux.vnet.ibm.com>
diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig
index 6adf8f1..1221f6b 100644
--- a/drivers/scsi/Kconfig
+++ b/drivers/scsi/Kconfig
@@ -848,18 +848,21 @@ config SCSI_IBMVSCSI
module will be called ibmvscsi.
config SCSI_IBMVSCSIS
- tristate "IBM Virtual SCSI Server support"
- depends on PPC_PSERIES && SCSI_SRP && TARGET_CORE
- help
- This is the IBM POWER Virtual SCSI Target Server
+ tristate "IBM Virtual SCSI Server support"
+ depends on PPC_PSERIES && SCSI_SRP && TARGET_CORE
+ help
+ This is the IBM POWER Virtual SCSI Target Server
+ This driver uses the SRP protocol for communication betwen servers
+ guest and/or the host that run on the same server.
+ More information on VSCSI protocol can be found at www.power.org
- The userspace component needed to initialize the driver and
- documentation can be found:
+ The userspace component needed to initialize the driver and
+ documentation can be found:
- https://github.com/powervm/ibmvscsis
+ https://github.com/powervm/ibmvscsis
- To compile this driver as a module, choose M here: the
- module will be called ibmvstgt.
+ To compile this driver as a module, choose M here: the
+ module will be called ibmvstgt.
config SCSI_IBMVFC
tristate "IBM Virtual FC support"
@@ -1743,14 +1746,17 @@ config SCSI_PM8001
based host adapters.
config SCSI_SRP
- tristate "SCSI RDMA Protocol helper library"
- depends on SCSI && PCI
- help
- This scsi srp module is a library for ibmvscsi target driver.
+ tristate "SCSI RDMA Protocol helper library"
+ depends on SCSI && PCI
+ help
+ This SCSI SRP module is a library for ibmvscsi target driver.
+ This module can only be used by SRP drivers that utilize synchronous
+ data transfers and not by SRP drivers that use asynchronous.
+
If you wish to use SRP target drivers, say Y.
- To compile this driver as a module, choose M here. The module will
- be called libsrp.
+ To compile this driver as a module, choose M here. The module will
+ be called libsrp.
config SCSI_BFA_FC
tristate "Brocade BFA Fibre Channel Support"
diff --git a/drivers/scsi/Makefile b/drivers/scsi/Makefile
index 8692dd4..9dfa4da 100644
--- a/drivers/scsi/Makefile
+++ b/drivers/scsi/Makefile
@@ -127,9 +127,9 @@ obj-$(CONFIG_SCSI_LASI700) += 53c700.o lasi700.o
obj-$(CONFIG_SCSI_SNI_53C710) += 53c700.o sni_53c710.o
obj-$(CONFIG_SCSI_NSP32) += nsp32.o
obj-$(CONFIG_SCSI_IPR) += ipr.o
-obj-$(CONFIG_SCSI_SRP) += libsrp.o
+obj-$(CONFIG_SCSI_SRP) += ibmvscsi/
obj-$(CONFIG_SCSI_IBMVSCSI) += ibmvscsi/
-obj-$(CONFIG_SCSI_IBMVSCSIS) += ibmvscsi/
+obj-$(CONFIG_SCSI_IBMVSCSIS) += ibmvscsi/
obj-$(CONFIG_SCSI_IBMVFC) += ibmvscsi/
obj-$(CONFIG_SCSI_HPTIOP) += hptiop.o
obj-$(CONFIG_SCSI_STEX) += stex.o
diff --git a/drivers/scsi/ibmvscsi/Makefile b/drivers/scsi/ibmvscsi/Makefile
index b241a567..e7a1663 100644
--- a/drivers/scsi/ibmvscsi/Makefile
+++ b/drivers/scsi/ibmvscsi/Makefile
@@ -1,3 +1,4 @@
obj-$(CONFIG_SCSI_IBMVSCSI) += ibmvscsi.o
-obj-$(CONFIG_SCSI_IBMVSCSIS) += ibmvscsis.o
+obj-$(CONFIG_SCSI_IBMVSCSIS) += ibmvscsis.o
obj-$(CONFIG_SCSI_IBMVFC) += ibmvfc.o
+obj-$(CONFIG_SCSI_SRP) += libsrp.o
diff --git a/drivers/scsi/ibmvscsi/ibmvscsis.c b/drivers/scsi/ibmvscsi/ibmvscsis.c
index c7eb347..6f9e9ba 100644
--- a/drivers/scsi/ibmvscsi/ibmvscsis.c
+++ b/drivers/scsi/ibmvscsi/ibmvscsis.c
@@ -22,13 +22,14 @@
*
****************************************************************************/
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/kthread.h>
#include <linux/types.h>
#include <linux/list.h>
-#include <linux/types.h>
#include <linux/string.h>
#include <linux/ctype.h>
#include <linux/utsname.h>
@@ -38,8 +39,6 @@
#include <scsi/scsi_device.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_tcq.h>
-#include <scsi/libsrp.h>
-#include <generated/utsrelease.h>
#include <target/target_core_base.h>
#include <target/target_core_fabric.h>
@@ -50,16 +49,16 @@
#include <asm/prom.h>
#include <asm/vio.h>
-#include "ibmvscsi.h"
#include "ibmvscsis.h"
#include "viosrp.h"
+#include "libsrp.h"
#define IBMVSCSIS_VERSION "v0.1"
#define INITIAL_SRP_LIMIT 15
#define DEFAULT_MAX_SECTORS 256
-#define MAX_H_COPY_RDMA (128*1024)
+#define MAX_H_COPY_RDMA (128 * 1024)
#define SRP_RSP_SENSE_DATA_LEN 18
@@ -75,7 +74,7 @@ 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);
+ 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);
@@ -137,7 +136,7 @@ static int ibmvscsis_rdma(struct scsi_cmnd *sc, struct scatterlist *sg,
enum dma_data_direction dir, unsigned int rest);
static int ibmvscsis_queuecommand(struct ibmvscsis_adapter *adapter,
struct iu_entry *iue);
-static uint64_t ibmvscsis_unpack_lun(const uint8_t *lun, int len);
+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);
@@ -146,7 +145,7 @@ static void ibmvscsis_determine_resid(struct se_cmd *se_cmd,
static bool connection_broken(struct ibmvscsis_adapter *adapter);
static inline long h_copy_rdma(s64 length, u64 sliobn, u64 slioba,
- u64 dliobn, u64 dlioba)
+ u64 dliobn, u64 dlioba)
{
long rc = 0;
@@ -154,11 +153,11 @@ static inline long h_copy_rdma(s64 length, u64 sliobn, u64 slioba,
mb();
rc = plpar_hcall_norets(H_COPY_RDMA, length, sliobn, slioba,
- dliobn, dlioba);
+ dliobn, dlioba);
return rc;
}
-static inline void h_free_crq(uint32_t unit_address)
+static inline void h_free_crq(u32 unit_address)
{
long rc = 0;
@@ -171,13 +170,13 @@ static inline void h_free_crq(uint32_t unit_address)
}
static inline long h_send_crq(struct ibmvscsis_adapter *adapter,
- u64 word1, u64 word2)
+ u64 word1, u64 word2)
{
long rc;
struct vio_dev *vdev = adapter->dma_dev;
- pr_debug("ibmvscsis: ibmvscsis_send_crq(0x%x, 0x%016llx, 0x%016llx)\n",
- vdev->unit_address, word1, word2);
+ pr_debug("ibmvscsis_send_crq(0x%x, 0x%016llx, 0x%016llx)\n",
+ vdev->unit_address, word1, word2);
/*
* Ensure the command buffer is flushed to memory before handing it
@@ -185,7 +184,7 @@ static inline long h_send_crq(struct ibmvscsis_adapter *adapter,
*/
mb();
rc = plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2);
- pr_debug("ibmvscsis: ibmvcsis_send_crq rc = 0x%lx\n", rc);
+ pr_debug("ibmvcsis_send_crq rc = 0x%lx\n", rc);
return rc;
}
@@ -195,8 +194,8 @@ static inline long h_send_crq(struct ibmvscsis_adapter *adapter,
/*****************************************************************************/
static const char ibmvscsis_driver_name[] = "ibmvscsis";
-static char system_id[64] = "";
-static char partition_name[97] = "UNKNOWN";
+static char system_id[SYS_ID_NAME_LEN] = "";
+static char partition_name[PARTITION_NAMELEN] = "UNKNOWN";
static unsigned int partition_number = -1;
static struct class_attribute ibmvscsis_class_attrs[] = {
@@ -227,11 +226,9 @@ static struct class ibmvscsis_class = {
};
static ssize_t ibmvscsis_wwn_version_show(struct config_item *item,
- char *page)
+ char *page)
{
- return sprintf(page, "IBMVSCSIS fabric %s on %s/%s on "UTS_RELEASE"\n",
- IBMVSCSIS_VERSION, utsname()->sysname,
- utsname()->machine);
+ return scnprintf(page, PAGE_SIZE, "%s\n", IBMVSCSIS_VERSION);
}
CONFIGFS_ATTR_RO(ibmvscsis_wwn_, version);
@@ -241,21 +238,23 @@ static struct configfs_attribute *ibmvscsis_wwn_attrs[] = {
};
static ssize_t ibmvscsis_tpg_enable_show(struct config_item *item,
- char *page)
+ char *page)
{
struct se_portal_group *se_tpg = to_tpg(item);
struct ibmvscsis_tport *tport = container_of(se_tpg,
- struct ibmvscsis_tport, 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)
+ 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);
+ struct ibmvscsis_tport,
+ se_tpg);
unsigned long tmp;
int ret;
@@ -267,7 +266,7 @@ static ssize_t ibmvscsis_tpg_enable_store(struct config_item *item,
if ((tmp != 0) && (tmp != 1)) {
pr_err("Illegal value for ibmvscsis_tpg_store_enable: %lu\n",
- tmp);
+ tmp);
return -EINVAL;
}
@@ -320,7 +319,7 @@ static const struct target_core_fabric_ops ibmvscsis_ops = {
.fabric_drop_tpg = ibmvscsis_drop_tpg,
.tfc_wwn_attrs = ibmvscsis_wwn_attrs,
- .tfc_tpg_base_attrs = ibmvscsis_tpg_attrs,
+ .tfc_tpg_base_attrs = ibmvscsis_tpg_attrs,
};
static struct vio_device_id ibmvscsis_device_table[] = {
@@ -340,7 +339,7 @@ static struct vio_driver ibmvscsis_driver = {
/* End of global device driver data areas */
/*****************************************************************************/
static int crq_queue_create(struct crq_queue *queue,
- struct ibmvscsis_adapter *adapter)
+ struct ibmvscsis_adapter *adapter)
{
int retrc;
int err;
@@ -360,8 +359,9 @@ static int crq_queue_create(struct crq_queue *queue,
if (dma_mapping_error(&vdev->dev, queue->msg_token))
goto map_failed;
- retrc = err = h_reg_crq(vdev->unit_address, queue->msg_token,
+ 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
@@ -369,10 +369,10 @@ static int crq_queue_create(struct crq_queue *queue,
if (err == H_RESOURCE)
err = ibmvscsis_reset_crq_queue(adapter);
if (err == 2) {
- pr_warn("ibmvscsis: Partner adapter not ready\n");
+ pr_warn("Partner adapter not ready\n");
retrc = 0;
} else if (err != 0) {
- pr_err("ibmvscsis: Error 0x%x opening virtual adapter\n", err);
+ pr_err("Error 0x%x opening virtual adapter\n", err);
goto reg_crq_failed;
}
@@ -384,13 +384,13 @@ static int crq_queue_create(struct crq_queue *queue,
err = request_irq(vdev->irq, &ibmvscsis_interrupt,
0, "ibmvscsis", adapter);
if (err) {
- pr_err("ibmvscsis: Error 0x%x h_send_crq\n", err);
+ pr_err("Error 0x%x h_send_crq\n", err);
goto req_irq_failed;
}
err = vio_enable_interrupts(vdev);
if (err != 0) {
- pr_err("ibmvscsis: Error %d enabling interrupts!!!\n", err);
+ pr_err("Error %d enabling interrupts!!!\n", err);
goto req_irq_failed;
}
@@ -402,18 +402,11 @@ 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);
+ free_page((unsigned long)queue->msgs);
malloc_failed:
return -1;
}
-/*
- * ibmvscsis_probe - ibm vscsis target initialize entry point
- * @param dev vio device struct
- * @param id vio device id struct
- * @return 0 - Success
- * Non-zero - Failure
- */
static int ibmvscsis_probe(struct vio_dev *vdev, const struct vio_device_id *id)
{
int ret = -ENOMEM;
@@ -422,12 +415,12 @@ static int ibmvscsis_probe(struct vio_dev *vdev, const struct vio_device_id *id)
struct ibmvscsis_tport *tport;
unsigned long flags;
- pr_debug("ibmvscsis: Probe for UA 0x%x\n", vdev->unit_address);
+ pr_debug("Probe for UA 0x%x\n", vdev->unit_address);
- adapter = kzalloc(sizeof(struct ibmvscsis_adapter), GFP_KERNEL);
+ adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
if (!adapter)
return ret;
- target = kzalloc(sizeof(struct srp_target), GFP_KERNEL);
+ target = kzalloc(sizeof(*target), GFP_KERNEL);
if (!target)
goto free_adapter;
@@ -443,33 +436,33 @@ static int ibmvscsis_probe(struct vio_dev *vdev, const struct vio_device_id *id)
if (ret != 0)
goto free_target;
- pr_debug("ibmvscsis: Probe: liobn 0x%x, riobn 0x%x\n", adapter->liobn,
- adapter->riobn);
+ pr_debug("Probe: liobn 0x%x, riobn 0x%x\n", adapter->liobn,
+ adapter->riobn);
spin_lock_irqsave(&ibmvscsis_dev_lock, flags);
list_add_tail(&adapter->list, &ibmvscsis_dev_list);
spin_unlock_irqrestore(&ibmvscsis_dev_lock, flags);
ret = srp_target_alloc(target, &vdev->dev,
- INITIAL_SRP_LIMIT,
- SRP_MAX_IU_LEN);
+ INITIAL_SRP_LIMIT,
+ SRP_MAX_IU_LEN);
adapter->target->ldata = adapter;
if (ret) {
- pr_err("ibmvscsis: failed target alloc ret: %d\n", ret);
+ pr_err("failed target alloc ret: %d\n", ret);
goto free_srp_target;
}
ret = crq_queue_create(&adapter->crq_queue, adapter);
if (ret != 0 && ret != H_RESOURCE) {
- pr_err("ibmvscsis: failed crq_queue_create ret: %d\n", ret);
+ 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("ibmvscsis: Failed to send CRQ message\n");
+ if (h_send_crq(adapter, 0xC001000000000000LL, 0) != 0 &&
+ ret != H_RESOURCE) {
+ pr_warn("Failed to send CRQ message\n");
ret = 0;
}
@@ -520,8 +513,8 @@ static void ibmvscsis_modify_rep_luns(struct se_cmd *se_cmd)
buf = transport_kmap_data_sg(se_cmd);
if (buf) {
data_len = be32_to_cpu(*(u32 *)buf);
- pr_debug("ibmvscsis: modify_rep_luns: len %d data_len %hud\n",
- len, data_len);
+ pr_debug("modify_rep_luns: len %d data_len %hud\n",
+ len, data_len);
if (data_len < len)
len = data_len;
buf += 8;
@@ -534,6 +527,12 @@ static void ibmvscsis_modify_rep_luns(struct se_cmd *se_cmd)
}
}
+/*
+ * 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;
@@ -556,7 +555,7 @@ static void ibmvscsis_modify_std_inquiry(struct se_cmd *se_cmd)
}
static int read_dma_window(struct vio_dev *vdev,
- struct ibmvscsis_adapter *adapter)
+ struct ibmvscsis_adapter *adapter)
{
const __be32 *dma_window;
const __be32 *prop;
@@ -567,9 +566,9 @@ static int read_dma_window(struct vio_dev *vdev,
*/
dma_window =
(const __be32 *)vio_get_attribute(vdev, "ibm,my-dma-window",
- NULL);
+ NULL);
if (!dma_window) {
- pr_err("ibmvscsis: Couldn't find ibm,my-dma-window property\n");
+ pr_err("Couldn't find ibm,my-dma-window property\n");
return -1;
}
@@ -577,20 +576,22 @@ static int read_dma_window(struct vio_dev *vdev,
dma_window++;
prop = (const __be32 *)vio_get_attribute(vdev, "ibm,#dma-address-cells",
- NULL);
+ NULL);
if (!prop) {
- pr_warn("ibmvscsis: Couldn't find ibm, #dma-address-cells property\n");
+ pr_warn("Couldn't find ibm, #dma-address-cells property\n");
dma_window++;
- } else
+ } else {
dma_window += be32_to_cpu(*prop);
+ }
prop = (const __be32 *)vio_get_attribute(vdev, "ibm,#dma-size-cells",
- NULL);
+ NULL);
if (!prop) {
- pr_warn("ibmvscsis: Couldn't find ibm, #dma-size-cells property\n");
+ pr_warn("Couldn't find ibm, #dma-size-cells property\n");
dma_window++;
- } else
+ } else {
dma_window += be32_to_cpu(*prop);
+ }
/* dma_window should point to the second window now */
adapter->riobn = be32_to_cpu(*dma_window);
@@ -644,7 +645,8 @@ static u32 ibmvscsis_tpg_get_inst_index(struct se_portal_group *se_tpg)
static int ibmvscsis_check_stop_free(struct se_cmd *se_cmd)
{
struct ibmvscsis_cmnd *cmd = container_of(se_cmd,
- struct ibmvscsis_cmnd, se_cmd);
+ struct ibmvscsis_cmnd,
+ se_cmd);
return target_put_sess_cmd(&cmd->se_cmd);
}
@@ -674,12 +676,12 @@ static u32 ibmvscsis_sess_get_index(struct se_session *se_sess)
static int ibmvscsis_write_pending(struct se_cmd *se_cmd)
{
struct ibmvscsis_cmnd *cmd = container_of(se_cmd,
- struct ibmvscsis_cmnd, 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;
- pr_debug("ibmvscsis: ibmvscsis_write_pending\n");
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;
@@ -687,7 +689,7 @@ static int ibmvscsis_write_pending(struct se_cmd *se_cmd)
ret = srp_transfer_data(sc, &vio_iu(iue)->srp.cmd,
ibmvscsis_rdma, 1, 1);
if (ret) {
- pr_err("ibmvscsis: srp_transfer_data() failed: %d\n", ret);
+ pr_err("srp_transfer_data() failed: %d\n", ret);
return -EAGAIN;
}
/*
@@ -748,7 +750,8 @@ static void ibmvscsis_determine_resid(struct se_cmd *se_cmd,
static int ibmvscsis_queue_data_in(struct se_cmd *se_cmd)
{
struct ibmvscsis_cmnd *cmd = container_of(se_cmd,
- struct ibmvscsis_cmnd, 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;
@@ -764,7 +767,6 @@ static int ibmvscsis_queue_data_in(struct se_cmd *se_cmd)
/*
* Check for overflow residual count
*/
- pr_debug("ibmvscsis: ibmvscsis_queue_data_in\n");
if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT)
scsi_set_resid(sc, se_cmd->residual_count);
@@ -775,19 +777,18 @@ static int ibmvscsis_queue_data_in(struct se_cmd *se_cmd)
if (scsi_sg_count(sc)) {
if (srp->cdb[0] == REPORT_LUNS &&
- adapter->client_data.os_type != LINUX)
+ 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("ibmvscsis: srp_transfer_data failed: %d\n",
- 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);
+ cmd->se_cmd.scsi_sense_length);
sd[0] = 0x70;
sd[2] = 3;
sd[7] = 10;
@@ -822,9 +823,10 @@ static int ibmvscsis_queue_data_in(struct se_cmd *se_cmd)
static int ibmvscsis_queue_status(struct se_cmd *se_cmd)
{
struct ibmvscsis_cmnd *cmd = container_of(se_cmd,
- struct ibmvscsis_cmnd, se_cmd);
+ struct ibmvscsis_cmnd,
+ se_cmd);
struct scsi_cmnd *sc = &cmd->sc;
- struct iu_entry *iue = (struct iu_entry *) sc->SCp.ptr;
+ struct iu_entry *iue = (struct iu_entry *)sc->SCp.ptr;
struct srp_rsp *rsp;
uint len;
char *data;
@@ -834,7 +836,6 @@ static int ibmvscsis_queue_status(struct se_cmd *se_cmd)
* set the appropriate sc->result to be translated by
* ibmvscsis_cmnd_done()
*/
- pr_debug("ibmvscsis: ibmvscsis_queue_status\n");
rsp = &vio_iu(iue)->srp.rsp;
len = sizeof(*rsp);
@@ -861,9 +862,10 @@ static int ibmvscsis_queue_status(struct se_cmd *se_cmd)
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 ibmvscsis_cmnd,
+ se_cmd);
struct scsi_cmnd *sc = &cmd->sc;
- struct iu_entry *iue = (struct iu_entry *) sc->SCp.ptr;
+ 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;
@@ -872,16 +874,16 @@ static void ibmvscsis_queue_tm_rsp(struct se_cmd *se_cmd)
u32 *tsk_status;
u32 rsp_code;
- pr_debug("ibmvscsis: ibmvscsis_queue_tm_rsp\n");
rsp = &vio_iu(iue)->srp.rsp;
if (transport_check_aborted_status(se_cmd, false) != 0) {
- pr_debug("ibmvscsis: queue_tm_rsp aborted\n");
+ 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));
+ rsp->req_lim_delta = cpu_to_be32(1 +
+ atomic_xchg(&adapter->
+ req_lim_delta, 0));
}
len = sizeof(*rsp);
@@ -923,13 +925,12 @@ static void ibmvscsis_aborted_task(struct se_cmd *se_cmd)
{
}
-static struct se_portal_group *ibmvscsis_make_nexus(
- struct ibmvscsis_tport *tport,
- const char *name)
+static struct se_portal_group *ibmvscsis_make_nexus(struct ibmvscsis_tport
+ *tport,
+ const char *name)
{
struct se_node_acl *acl;
- pr_debug("ibmvscsis: make nexus");
if (tport->se_sess) {
pr_debug("tport->se_sess already exists\n");
return &tport->se_tpg;
@@ -950,10 +951,10 @@ static struct se_portal_group *ibmvscsis_make_nexus(
*/
acl = core_tpg_check_initiator_node_acl(&tport->se_tpg,
- (unsigned char *)name);
+ (unsigned char *)name);
if (!acl) {
pr_debug("core_tpg_check_initiator_node_acl() failed for %s\n",
- name);
+ name);
goto acl_failed;
}
tport->se_sess->se_node_acl = acl;
@@ -962,8 +963,8 @@ static struct se_portal_group *ibmvscsis_make_nexus(
* 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);
+ tport->se_sess->se_node_acl,
+ tport->se_sess, tport);
tport->se_sess->se_tpg = &tport->se_tpg;
@@ -1027,8 +1028,8 @@ static struct se_wwn *ibmvscsis_make_tport(struct target_fabric_configfs *tf,
goto err;
tport->tport_proto_id = SCSI_PROTOCOL_SRP;
- pr_debug("ibmvscsis: make_tport(%s), pointer:%p tport_id:%x\n", name,
- tport, tport->tport_proto_id);
+ pr_debug("make_tport(%s), pointer:%p tport_id:%x\n", name, tport,
+ tport->tport_proto_id);
return &tport->tport_wwn;
err:
@@ -1038,10 +1039,11 @@ err:
static void ibmvscsis_drop_tport(struct se_wwn *wwn)
{
struct ibmvscsis_tport *tport = container_of(wwn,
- struct ibmvscsis_tport, tport_wwn);
+ struct ibmvscsis_tport,
+ tport_wwn);
pr_debug("drop_tport(%s\n",
- config_item_name(&tport->tport_wwn.wwn_group.cg_item));
+ config_item_name(&tport->tport_wwn.wwn_group.cg_item));
}
static struct se_portal_group *ibmvscsis_make_tpg(struct se_wwn *wwn,
@@ -1066,7 +1068,8 @@ static struct se_portal_group *ibmvscsis_make_tpg(struct se_wwn *wwn,
static void ibmvscsis_drop_tpg(struct se_portal_group *se_tpg)
{
struct ibmvscsis_tport *tport = container_of(se_tpg,
- struct ibmvscsis_tport, se_tpg);
+ struct ibmvscsis_tport,
+ se_tpg);
tport->releasing = true;
tport->enabled = false;
@@ -1108,7 +1111,6 @@ static int get_system_info(void)
const char *id, *model, *name;
const unsigned int *num;
- pr_debug("ibmvscsis: getsysteminfo");
rootdn = of_find_node_by_path("/");
if (!rootdn)
return -ENOENT;
@@ -1147,7 +1149,6 @@ static irqreturn_t ibmvscsis_interrupt(int dummy, void *data)
{
struct ibmvscsis_adapter *adapter = data;
- pr_debug("ibmvscsis: there is an interrupt\n");
vio_disable_interrupts(adapter->dma_dev);
queue_work(vtgtd, &adapter->crq_work);
@@ -1164,14 +1165,14 @@ static int process_srp_iu(struct iu_entry *iue)
int err = 1;
spin_lock_irqsave(&target->lock, flags);
- if (adapter->tport.releasing == true) {
- pr_err("ibmvscsis: process_srp_iu error, tport is released:%x\n",
- adapter->tport.releasing);
+ if (adapter->tport.releasing) {
+ pr_err("process_srp_iu error, tport is released:%x\n",
+ adapter->tport.releasing);
goto done;
}
- if (adapter->tport.enabled == false) {
- pr_err("ibmvscsis: process_srp_iu, tport not enabled:%x\n",
- adapter->tport.enabled);
+ if (!adapter->tport.enabled) {
+ pr_err("process_srp_iu, tport not enabled:%x\n",
+ adapter->tport.enabled);
goto done;
}
spin_unlock_irqrestore(&target->lock, flags);
@@ -1187,7 +1188,7 @@ static int process_srp_iu(struct iu_entry *iue)
err = ibmvscsis_queuecommand(adapter, iue);
if (err) {
srp_iu_put(iue);
- pr_err("ibmvscsis: can't queue cmd\n");
+ pr_err("can't queue cmd\n");
}
break;
case SRP_LOGIN_RSP:
@@ -1200,10 +1201,10 @@ static int process_srp_iu(struct iu_entry *iue)
case SRP_CRED_RSP:
case SRP_AER_REQ:
case SRP_AER_RSP:
- pr_err("ibmvscsis: Unsupported type %u\n", opcode);
+ pr_err("Unsupported type %u\n", opcode);
break;
default:
- pr_err("ibmvscsis: Unknown type %u\n", opcode);
+ pr_err("Unknown type %u\n", opcode);
}
return err;
@@ -1221,15 +1222,15 @@ static void process_iu(struct viosrp_crq *crq,
iue = srp_iu_get(adapter->target);
if (!iue) {
- pr_err("ibmvscsis: Error getting IU from pool %p\n", iue);
+ pr_err("Error getting IU from pool %p\n", iue);
return;
}
iue->remote_token = crq->IU_data_ptr;
err = h_copy_rdma(be16_to_cpu(crq->IU_length), adapter->riobn,
- be64_to_cpu(crq->IU_data_ptr),
- adapter->liobn, iue->sbuf->dma);
+ be64_to_cpu(crq->IU_data_ptr),
+ adapter->liobn, iue->sbuf->dma);
switch (err) {
case H_SUCCESS:
@@ -1238,16 +1239,16 @@ static void process_iu(struct viosrp_crq *crq,
case H_SOURCE_PARM:
case H_DEST_PARM:
if (connection_broken(adapter))
- pr_debug("ibmvscsis: rdma connection broken\n");
+ pr_debug("rdma connection broken\n");
default:
- pr_err("ibmvscsis: process iu error\n");
+ pr_err("process iu error\n");
break;
}
- if (crq->format == VIOSRP_MAD_FORMAT)
+ if (crq->format == VIOSRP_MAD_FORMAT) {
process_mad_iu(iue);
- else {
- pr_debug("ibmvscsis: process srpiu");
+ } else {
+ pr_debug("process srpiu");
process_srp_iu(iue);
}
}
@@ -1265,7 +1266,7 @@ static void process_crq(struct viosrp_crq *crq,
case 0x02:
break;
default:
- pr_err("ibmvscsis: Unknown format %u\n", crq->format);
+ pr_err("Unknown format %u\n", crq->format);
}
break;
case 0xFF:
@@ -1275,12 +1276,12 @@ static void process_crq(struct viosrp_crq *crq,
case PARTNER_FAILED:
case PARTNER_DEREGISTER:
adapter->client_data.os_type = 0;
- pr_debug("ibmvscsis (%s):trans_event:good format %d\n",
- dev_name(&adapter->dma_dev->dev), (uint)crq->format);
+ pr_debug("trans_event:good format %d\n",
+ (uint)crq->format);
break;
default:
- pr_err("ibmvscsis (%s):trans_event:invalid format %d\n",
- dev_name(&adapter->dma_dev->dev), (uint)crq->format);
+ pr_err("trans_event:invalid format %d\n",
+ (uint)crq->format);
}
break;
case 0x80:
@@ -1294,17 +1295,14 @@ static void process_crq(struct viosrp_crq *crq,
case VIOSRP_AIX_FORMAT:
case VIOSRP_LINUX_FORMAT:
case VIOSRP_INLINE_FORMAT:
- pr_err("ibmvscsis: Unsupported format %u\n",
- crq->format);
+ pr_err("Unsupported format %u\n", crq->format);
break;
default:
- pr_err("ibmvscsis: Unknown format %u\n",
- crq->format);
+ pr_err("Unknown format %u\n", crq->format);
}
break;
default:
- pr_err("ibmvscsis: unknown message type 0x%02x!?\n",
- crq->valid);
+ pr_err("Unknown message type 0x%02x!?\n", crq->valid);
}
}
@@ -1328,8 +1326,9 @@ static void handle_crq(struct work_struct *work)
vio_disable_interrupts(adapter->dma_dev);
process_crq(crq, adapter);
crq->valid = 0x00;
- } else
+ } else {
done = 1;
+ }
}
}
@@ -1347,13 +1346,12 @@ static int ibmvscsis_reset_crq_queue(struct ibmvscsis_adapter *adapter)
queue->cur = 0;
/* And re-open it again */
- rc = h_reg_crq(vdev->unit_address, queue->msg_token,
- PAGE_SIZE);
+ 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("ibmvscsis: Partner adapter not ready\n");
+ pr_warn("Partner adapter not ready\n");
else if (rc != 0)
- pr_err("ibmvscsis: couldn't register crq--rc 0x%x\n", rc);
+ pr_err("Couldn't register crq--rc 0x%x\n", rc);
return rc;
}
@@ -1388,8 +1386,9 @@ static inline struct viosrp_crq *next_crq(struct crq_queue *queue)
* other bits of the CRQ entry
*/
rmb();
- } else
+ } else {
crq = NULL;
+ }
spin_unlock_irqrestore(&queue->lock, flags);
return crq;
@@ -1405,12 +1404,12 @@ static int send_iu(struct iu_entry *iue, u64 length, u8 format)
long rc, rc1;
rsp = &vio_iu(iue)->srp.rsp;
- pr_debug("ibmvscsis: 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));
+ 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));
/* First copy the SRP */
rc = h_copy_rdma(length, adapter->liobn, iue->sbuf->dma,
@@ -1423,18 +1422,18 @@ static int send_iu(struct iu_entry *iue, u64 length, u8 format)
case H_SOURCE_PARM:
case H_DEST_PARM:
if (connection_broken(adapter)) {
- pr_debug("ibmvscsis: rdma connection broken\n");
+ pr_debug("rdma connection broken\n");
goto end;
}
break;
default:
- pr_err("ibmvscsis: Error %ld transferring data\n", rc);
+ pr_err("Error %ld transferring data\n", rc);
length = 0;
break;
}
- pr_debug("ibmvscsis: crq pre cooked: 0x%x, 0x%llx, 0x%llx\n",
- format, length, vio_iu(iue)->srp.rsp.tag);
+ pr_debug("crq pre cooked: 0x%x, 0x%llx, 0x%llx\n",
+ format, length, vio_iu(iue)->srp.rsp.tag);
crq_msg.valid = 0x80;
crq_msg.format = format;
@@ -1447,18 +1446,18 @@ static int send_iu(struct iu_entry *iue, u64 length, u8 format)
crq_msg.IU_length = cpu_to_be16(length);
crq_msg.IU_data_ptr = vio_iu(iue)->srp.rsp.tag;
- pr_debug("ibmvscsis: 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]));
+ 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]));
srp_iu_put(iue);
rc1 = h_send_crq(adapter, be64_to_cpu(crq_as_u64[0]),
- be64_to_cpu(crq_as_u64[1]));
+ be64_to_cpu(crq_as_u64[1]));
if (rc1) {
- pr_err("ibmvscsis: %ld sending response\n", rc1);
+ pr_err("%ld sending response\n", rc1);
return rc1;
}
return rc;
@@ -1486,18 +1485,18 @@ static int send_adapter_info(struct iu_entry *iue,
info = dma_alloc_coherent(&adapter->dma_dev->dev, sizeof(*info),
&data_token, GFP_KERNEL);
if (!info) {
- pr_err("ibmvscsis: bad dma_alloc_coherent %p\n", target);
+ pr_err("bad dma_alloc_coherent %p\n", target);
mad->common.status = cpu_to_be16(VIOSRP_MAD_FAILED);
return 1;
}
/* Get remote info */
err = h_copy_rdma(sizeof(*info), adapter->riobn,
- be64_to_cpu(remote_buffer),
- adapter->liobn, data_token);
+ be64_to_cpu(remote_buffer),
+ adapter->liobn, data_token);
if (err == H_SUCCESS) {
- pr_err("ibmvscsis: Client connect: %s (%d)\n",
+ pr_err("Client connect: %s (%d)\n",
info->partition_name, info->partition_number);
if (adapter->client_data.partition_number == 0)
@@ -1511,8 +1510,8 @@ static int send_adapter_info(struct iu_entry *iue,
adapter->client_data.mad_version =
be32_to_cpu(info->mad_version);
adapter->client_data.os_type = be32_to_cpu(info->os_type);
- pr_debug("ibmvscsis: adapterinfo client adapter %u\n",
- adapter->client_data.os_type);
+ pr_debug("adapter info client adapter %u\n",
+ adapter->client_data.os_type);
strcpy(info->srp_version, "16.a");
strncpy(info->partition_name, partition_name,
@@ -1523,7 +1522,7 @@ static int send_adapter_info(struct iu_entry *iue,
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);
+ PAGE_SIZE);
dma_rmb();
/* Send our info to remote */
@@ -1537,14 +1536,14 @@ static int send_adapter_info(struct iu_entry *iue,
case H_SOURCE_PARM:
case H_DEST_PARM:
if (connection_broken(adapter))
- pr_debug("ibmvscsis: rdma connection broken\n");
+ pr_debug("rdma connection broken\n");
default:
- pr_err("ibmvscsis: Error sending adapter info %d\n",
+ pr_err("Error sending adapter info %d\n",
err);
return -EIO;
}
} else {
- pr_err("ibmvscsis: Error sending adapter info %d\n", err);
+ pr_err("Error sending adapter info %d\n", err);
return 1;
}
@@ -1562,10 +1561,10 @@ static int process_mad_iu(struct iu_entry *iue)
switch (be32_to_cpu(iu->mad.empty_iu.common.type)) {
case VIOSRP_EMPTY_IU_TYPE:
- pr_err("ibmvscsis: %s\n", "Unsupported EMPTY MAD IU");
+ pr_err("%s\n", "Unsupported EMPTY MAD IU");
break;
case VIOSRP_ERROR_LOG_TYPE:
- pr_err("ibmvscsis: %s\n", "Unsupported ERROR LOG MAD IU");
+ 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;
@@ -1581,7 +1580,7 @@ static int process_mad_iu(struct iu_entry *iue)
send_iu(iue, sizeof(*conf), VIOSRP_MAD_FORMAT);
break;
default:
- pr_err("ibmvscsis: Unknown type %u\n", iu->srp.rsp.opcode);
+ 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);
@@ -1622,18 +1621,17 @@ static void process_login(struct iu_entry *iue)
snprintf(name, sizeof(name), "%x", vdev->unit_address);
- if (adapter->tport.enabled == false) {
+ if (!adapter->tport.enabled) {
rej->reason = cpu_to_be32(SRP_LOGIN_REJ_INSUFFICIENT_RESOURCES);
- pr_err("ibmvscsis: Rejected SRP_LOGIN_REQ because target %s has not yet been enabled",
+ pr_err("Rejected SRP_LOGIN_REQ because target %s has not yet been enabled",
name);
goto reject;
}
se_tpg = ibmvscsis_make_nexus(&adapter->tport,
&adapter->tport.tport_name[0]);
- if (se_tpg == NULL) {
- pr_debug("ibmvscsis: login make nexus fail se_tpg(%p)\n",
- se_tpg);
+ if (!se_tpg) {
+ pr_debug("login make nexus fail se_tpg(%p)\n", se_tpg);
goto reject;
}
@@ -1641,14 +1639,14 @@ static void process_login(struct iu_entry *iue)
rsp->req_lim_delta = cpu_to_be32(INITIAL_SRP_LIMIT);
- pr_debug("ibmvscsis: process_login, tag:%llu\n", tag);
+ pr_debug("process_login, tag:%llu\n", tag);
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);
+ rsp->buf_fmt = cpu_to_be16(SRP_BUF_FORMAT_DIRECT |
+ SRP_BUF_FORMAT_INDIRECT);
send_iu(iue, sizeof(*rsp), VIOSRP_SRP_FORMAT);
return;
@@ -1656,8 +1654,8 @@ static void process_login(struct iu_entry *iue)
reject:
rej->opcode = SRP_LOGIN_REJ;
rej->tag = tag;
- rej->buf_fmt = cpu_to_be16(SRP_BUF_FORMAT_DIRECT
- | SRP_BUF_FORMAT_INDIRECT);
+ rej->buf_fmt = cpu_to_be16(SRP_BUF_FORMAT_DIRECT |
+ SRP_BUF_FORMAT_INDIRECT);
send_iu(iue, sizeof(*rej), VIOSRP_SRP_FORMAT);
}
@@ -1674,7 +1672,7 @@ static void process_tsk_mgmt(struct ibmvscsis_adapter *adapter,
int rc = 0;
rsp = &vio_iu(iue)->srp.rsp;
- unpacked_lun = ibmvscsis_unpack_lun((uint8_t *)&srp_tsk->lun,
+ unpacked_lun = ibmvscsis_unpack_lun((u8 *)&srp_tsk->lun,
sizeof(srp_tsk->lun));
switch (srp_tsk->tsk_mgmt_func) {
@@ -1696,36 +1694,30 @@ static void process_tsk_mgmt(struct ibmvscsis_adapter *adapter,
tcm_type = TMR_CLEAR_ACA;
break;
default:
- pr_err("ibmvscsis: unknown task mgmt func %d\n",
- srp_tsk->tsk_mgmt_func);
+ 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;
- rc = -1;
- break;
+ goto fail;
}
- if (!rc) {
- cmd->se_cmd.tag = be64_to_cpu(srp_tsk->tag);
-
- pr_debug("ibmvscsis: 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("ibmvscsis: target_submit_tmr failed, rc %d\n",
- rc);
- cmd->se_cmd.se_tmr_req->response =
- TMR_FUNCTION_REJECTED;
- goto fail;
- }
+ cmd->se_cmd.tag = be64_to_cpu(srp_tsk->tag);
+
+ 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;
}
+
fail:
if (rc)
transport_send_check_condition_and_sense(&cmd->se_cmd, 0, 0);
-
}
static bool connection_broken(struct ibmvscsis_adapter *adapter)
@@ -1737,7 +1729,8 @@ static bool connection_broken(struct ibmvscsis_adapter *adapter)
/* create a PING crq */
crq = (struct viosrp_crq *)&buffer;
- buffer[0] = buffer[1] = 0;
+ buffer[0] = 0;
+ buffer[1] = 0;
crq->valid = 0x80;
crq->format = 6;
crq->status = 0xF5;
@@ -1746,8 +1739,7 @@ static bool connection_broken(struct ibmvscsis_adapter *adapter)
cpu_to_be64(buffer[0]),
cpu_to_be64(buffer[1]));
- pr_debug("ibmvscsis (%s): connection_broken: rc %ld\n",
- dev_name(&adapter->dma_dev->dev), h_return_code);
+ pr_debug("connection_broken: rc %ld\n", h_return_code);
if (h_return_code == H_CLOSED)
rc = true;
@@ -1759,7 +1751,7 @@ 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 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;
@@ -1767,7 +1759,8 @@ static int ibmvscsis_rdma(struct scsi_cmnd *sc, struct scatterlist *sg, int nsg,
unsigned int done = 0;
int i, sidx, soff;
- sidx = soff = 0;
+ sidx = 0;
+ soff = 0;
token = sg_dma_address(sg + sidx);
for (i = 0; i < nmd && rest; i++) {
@@ -1788,7 +1781,8 @@ static int ibmvscsis_rdma(struct scsi_cmnd *sc, struct scatterlist *sg, int nsg,
adapter->liobn,
token + soff,
adapter->riobn,
- be64_to_cpu(md[i].va)+mdone);
+ be64_to_cpu(md[i].va) +
+ mdone);
switch (err) {
case H_SUCCESS:
break;
@@ -1796,10 +1790,10 @@ static int ibmvscsis_rdma(struct scsi_cmnd *sc, struct scatterlist *sg, int nsg,
case H_SOURCE_PARM:
case H_DEST_PARM:
if (connection_broken(adapter))
- pr_debug("ibmvscsis: rdma connection broken\n");
+ pr_debug("rdma connection broken\n");
default:
- pr_err("ibmvscsis: rdma error %d %d %ld\n",
- dir, slen, err);
+ pr_err("rdma error %d %d %ld\n",
+ dir, slen, err);
return -EIO;
}
@@ -1814,8 +1808,8 @@ static int ibmvscsis_rdma(struct scsi_cmnd *sc, struct scatterlist *sg, int nsg,
token = sg_dma_address(sg + sidx);
if (sidx > nsg) {
- pr_err("ibmvscsis: out of sg %p %d %d\n",
- iue, sidx, nsg);
+ pr_err("out of sg %p %d %d\n",
+ iue, sidx, nsg);
return -EIO;
}
}
@@ -1833,8 +1827,6 @@ static int ibmvscsis_queuecommand(struct ibmvscsis_adapter *adapter,
struct ibmvscsis_cmnd *vsc;
int ret;
- pr_debug("ibmvscsis: ibmvscsis_queuecommand\n");
-
vsc = kzalloc(sizeof(*vsc), GFP_KERNEL);
adapter->cmd = vsc;
sc = &vsc->sc;
@@ -1847,14 +1839,14 @@ static int ibmvscsis_queuecommand(struct ibmvscsis_adapter *adapter,
return ret;
}
-static uint64_t ibmvscsis_unpack_lun(const uint8_t *lun, int len)
+static u64 ibmvscsis_unpack_lun(const u8 *lun, int len)
{
- uint64_t res = NO_SUCH_LUN;
+ u64 res = NO_SUCH_LUN;
int addressing_method;
if (unlikely(len < 2)) {
pr_err("Illegal LUN length %d, expected 2 bytes or more\n",
- len);
+ len);
goto out;
}
@@ -1888,7 +1880,7 @@ static uint64_t ibmvscsis_unpack_lun(const uint8_t *lun, int len)
case SCSI_LUN_ADDR_METHOD_EXTENDED_LUN:
default:
pr_err("Unimplemented LUN addressing method %u\n",
- addressing_method);
+ addressing_method);
break;
}
@@ -1907,7 +1899,7 @@ static int tcm_queuecommand(struct ibmvscsis_adapter *adapter,
int attr;
u64 data_len;
int ret;
- uint64_t unpacked_lun;
+ u64 unpacked_lun;
switch (scmd->task_attr) {
case SRP_SIMPLE_TASK:
@@ -1923,24 +1915,23 @@ static int tcm_queuecommand(struct ibmvscsis_adapter *adapter,
attr = TCM_ACA_TAG;
break;
default:
- pr_err("ibmvscsis: Task attribute %d not supported\n",
- scmd->task_attr);
+ pr_err("Task attribute %d not supported\n", scmd->task_attr);
attr = TCM_SIMPLE_TAG;
}
- pr_debug("ibmvscsis: srp_data_length: %llx, srp_direction:%x\n",
- srp_data_length(scmd, srp_cmd_direction(scmd)),
- srp_cmd_direction(scmd));
+ 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));
vsc->se_cmd.tag = scmd->tag;
se_cmd = &vsc->se_cmd;
- pr_debug("ibmvscsis: size of lun:%lx, lun:%s\n", sizeof(scmd->lun),
- &scmd->lun.scsi_lun[0]);
+ pr_debug("size of lun:%lx, lun:%s\n", sizeof(scmd->lun),
+ &scmd->lun.scsi_lun[0]);
- unpacked_lun = ibmvscsis_unpack_lun((uint8_t *)&scmd->lun,
- sizeof(scmd->lun));
+ unpacked_lun = ibmvscsis_unpack_lun((u8 *)&scmd->lun,
+ sizeof(scmd->lun));
ret = target_submit_cmd(se_cmd, adapter->tport.se_sess,
&scmd->cdb[0], &vsc->sense_buf[0], unpacked_lun,
@@ -1948,7 +1939,7 @@ static int tcm_queuecommand(struct ibmvscsis_adapter *adapter,
TARGET_SCF_ACK_KREF);
if (ret != 0) {
ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
- pr_debug("ibmvscsis: tcm_queuecommand fail submit_cmd\n");
+ pr_debug("tcm_queuecommand fail submit_cmd\n");
goto send_sense;
}
return 0;
@@ -1971,27 +1962,21 @@ static int __init ibmvscsis_init(void)
{
int ret = -ENOMEM;
- pr_info("IBMVSCSIS fabric module %s on %s/%s on "UTS_RELEASE"\n",
- IBMVSCSIS_VERSION,
- utsname()->sysname,
- utsname()->machine);
-
ret = get_system_info();
if (ret) {
- pr_err("ibmvscsis: ret %d from get_system_info\n", ret);
+ pr_err("ret %d from get_system_info\n", ret);
goto out;
}
ret = class_register(&ibmvscsis_class);
if (ret) {
- pr_err("ibmvscsis failed class register\n");
+ pr_err("failed class register\n");
goto out;
}
ret = target_register_template(&ibmvscsis_ops);
if (ret) {
- pr_err("ibmvscsis: ret %d from target_register_template\n",
- ret);
+ pr_err("ret %d from target_register_template\n", ret);
goto unregister_class;
}
@@ -2001,7 +1986,7 @@ static int __init ibmvscsis_init(void)
ret = vio_register_driver(&ibmvscsis_driver);
if (ret) {
- pr_err("ibmvscsis: ret %d from vio_register_driver\n", ret);
+ pr_err("ret %d from vio_register_driver\n", ret);
goto destroy_wq;
}
@@ -2019,7 +2004,7 @@ out:
static void __exit ibmvscsis_exit(void)
{
- pr_info("ibmvscsis: Unregister IBM virtual SCSI driver\n");
+ pr_info("Unregister IBM virtual SCSI driver\n");
vio_unregister_driver(&ibmvscsis_driver);
destroy_workqueue(vtgtd);
target_unregister_template(&ibmvscsis_ops);
@@ -2029,5 +2014,6 @@ static void __exit ibmvscsis_exit(void)
MODULE_DESCRIPTION("IBMVSCSIS fabric driver");
MODULE_AUTHOR("Bryant G. Ly");
MODULE_LICENSE("GPL");
+MODULE_VERSION(IBMVSCSIS_VERSION);
module_init(ibmvscsis_init);
module_exit(ibmvscsis_exit);
diff --git a/drivers/scsi/ibmvscsi/ibmvscsis.h b/drivers/scsi/ibmvscsi/ibmvscsis.h
index bcee92b..0637aeb 100644
--- a/drivers/scsi/ibmvscsi/ibmvscsis.h
+++ b/drivers/scsi/ibmvscsi/ibmvscsis.h
@@ -25,27 +25,36 @@
#ifndef __H_IBMVSCSIS
#define __H_IBMVSCSIS
+#define SYS_ID_NAME_LEN 64
+#define PARTITION_NAMELEN 97
#define IBMVSCSIS_NAMELEN 32
#define SCSOLNT_RESP_SHIFT 1
#define UCSOLNT_RESP_SHIFT 2
-#define SCSOLNT (1 << SCSOLNT_RESP_SHIFT)
-#define UCSOLNT (1 << UCSOLNT_RESP_SHIFT)
+#define SCSOLNT BIT(SCSOLNT_RESP_SHIFT)
+#define UCSOLNT BIT(UCSOLNT_RESP_SHIFT)
#define INQ_DATA_OFFSET 8
#define NO_SUCH_LUN ((u64)-1LL)
+struct crq_queue {
+ struct viosrp_crq *msgs;
+ int size, cur;
+ dma_addr_t msg_token;
+ spinlock_t lock;
+};
+
struct client_info {
#define SRP_VERSION "16.a"
char srp_version[8];
/* root node property ibm,partition-name */
- char partition_name[96];
+ char partition_name[PARTITION_NAMELEN];
/* root node property ibm,partition-no */
- uint32_t partition_number;
+ u32 partition_number;
/* initially 1 */
- uint32_t mad_version;
- uint32_t os_type;
+ u32 mad_version;
+ u32 os_type;
};
struct ibmvscsis_cmnd {
@@ -112,25 +121,6 @@ struct ibmvscsis_nacl {
struct se_node_acl se_node_acl;
};
-struct inquiry_data {
- u8 qual_type;
- u8 rmb_reserve;
- u8 version;
- u8 aerc_naca_hisup_format;
- u8 addl_len;
- u8 sccs_reserved;
- u8 bque_encserv_vs_multip_mchngr_reserved;
- u8 reladr_reserved_linked_cmdqueue_vs;
- char vendor[8];
- char product[16];
- char revision[4];
- char vendor_specific[20];
- char reserved1[2];
- char version_descriptor[16];
- char reserved2[22];
- char unique[158];
-};
-
enum srp_trans_event {
UNUSED_FORMAT = 0,
PARTNER_FAILED = 1,
diff --git a/drivers/scsi/ibmvscsi/libsrp.c b/drivers/scsi/ibmvscsi/libsrp.c
new file mode 100644
index 0000000..4bece8f
--- /dev/null
+++ b/drivers/scsi/ibmvscsi/libsrp.c
@@ -0,0 +1,386 @@
+/*******************************************************************************
+ * SCSI RDMA Protocol lib functions
+ *
+ * Copyright (C) 2006 FUJITA Tomonori <tomof@....org>
+ * Copyright (C) 2016 Bryant G. Ly <bgly@...ibm.com> IBM Corp.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ ***********************************************************************/
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/printk.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/kfifo.h>
+#include <linux/scatterlist.h>
+#include <linux/dma-mapping.h>
+#include <linux/module.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_tcq.h>
+#include <scsi/srp.h>
+#include <target/target_core_base.h>
+
+#include "libsrp.h"
+
+static int srp_iu_pool_alloc(struct srp_queue *q, size_t max,
+ struct srp_buf **ring)
+{
+ int i;
+ struct iu_entry *iue;
+
+ q->pool = kcalloc(max, sizeof(struct iu_entry *), GFP_KERNEL);
+ if (!q->pool)
+ return -ENOMEM;
+ q->items = kcalloc(max, sizeof(struct iu_entry), GFP_KERNEL);
+ if (!q->items)
+ goto free_pool;
+
+ spin_lock_init(&q->lock);
+ kfifo_init(&q->queue, (void *)q->pool, max * sizeof(void *));
+
+ for (i = 0, iue = q->items; i < max; i++) {
+ kfifo_in(&q->queue, (void *)&iue, sizeof(void *));
+ iue->sbuf = ring[i];
+ iue++;
+ }
+ return 0;
+
+free_pool:
+ kfree(q->pool);
+ return -ENOMEM;
+}
+
+static void srp_iu_pool_free(struct srp_queue *q)
+{
+ kfree(q->items);
+ kfree(q->pool);
+}
+
+static struct srp_buf **srp_ring_alloc(struct device *dev,
+ size_t max, size_t size)
+{
+ struct srp_buf **ring;
+ int i;
+
+ ring = kcalloc(max, sizeof(struct srp_buf *), GFP_KERNEL);
+ if (!ring)
+ return NULL;
+
+ for (i = 0; i < max; i++) {
+ ring[i] = kzalloc(sizeof(*ring[i]), GFP_KERNEL);
+ if (!ring[i])
+ goto out;
+ ring[i]->buf = dma_alloc_coherent(dev, size, &ring[i]->dma,
+ GFP_KERNEL);
+ if (!ring[i]->buf)
+ goto out;
+ }
+ return ring;
+
+out:
+ for (i = 0; i < max && ring[i]; i++) {
+ if (ring[i]->buf) {
+ dma_free_coherent(dev, size, ring[i]->buf,
+ ring[i]->dma);
+ }
+ kfree(ring[i]);
+ }
+ kfree(ring);
+
+ return NULL;
+}
+
+static void srp_ring_free(struct device *dev, struct srp_buf **ring,
+ size_t max, size_t size)
+{
+ int i;
+
+ for (i = 0; i < max; i++) {
+ dma_free_coherent(dev, size, ring[i]->buf, ring[i]->dma);
+ kfree(ring[i]);
+ }
+ kfree(ring);
+}
+
+int srp_target_alloc(struct srp_target *target, struct device *dev,
+ size_t nr, size_t iu_size)
+{
+ int err;
+
+ spin_lock_init(&target->lock);
+
+ target->dev = dev;
+
+ target->srp_iu_size = iu_size;
+ target->rx_ring_size = nr;
+ target->rx_ring = srp_ring_alloc(target->dev, nr, iu_size);
+ if (!target->rx_ring)
+ return -ENOMEM;
+ err = srp_iu_pool_alloc(&target->iu_queue, nr, target->rx_ring);
+ if (err)
+ goto free_ring;
+
+ dev_set_drvdata(target->dev, target);
+ return 0;
+
+free_ring:
+ srp_ring_free(target->dev, target->rx_ring, nr, iu_size);
+ return -ENOMEM;
+}
+EXPORT_SYMBOL_GPL(srp_target_alloc);
+
+void srp_target_free(struct srp_target *target)
+{
+ dev_set_drvdata(target->dev, NULL);
+ srp_ring_free(target->dev, target->rx_ring, target->rx_ring_size,
+ target->srp_iu_size);
+ srp_iu_pool_free(&target->iu_queue);
+}
+EXPORT_SYMBOL_GPL(srp_target_free);
+
+struct iu_entry *srp_iu_get(struct srp_target *target)
+{
+ struct iu_entry *iue = NULL;
+
+ if (kfifo_out_locked(&target->iu_queue.queue, (void *)&iue,
+ sizeof(void *),
+ &target->iu_queue.lock) != sizeof(void *)) {
+ WARN_ONCE(1, "unexpected fifo state");
+ return NULL;
+ }
+ if (!iue)
+ return iue;
+ iue->target = target;
+ iue->flags = 0;
+ return iue;
+}
+EXPORT_SYMBOL_GPL(srp_iu_get);
+
+void srp_iu_put(struct iu_entry *iue)
+{
+ kfifo_in_locked(&iue->target->iu_queue.queue, (void *)&iue,
+ sizeof(void *), &iue->target->iu_queue.lock);
+}
+EXPORT_SYMBOL_GPL(srp_iu_put);
+
+static int srp_direct_data(struct scsi_cmnd *sc, struct srp_direct_buf *md,
+ enum dma_data_direction dir, srp_rdma_t rdma_io,
+ int dma_map, int ext_desc)
+{
+ struct iu_entry *iue = NULL;
+ struct scatterlist *sg = NULL;
+ int err, nsg = 0, len;
+
+ if (dma_map) {
+ iue = (struct iu_entry *)sc->SCp.ptr;
+ sg = scsi_sglist(sc);
+ nsg = dma_map_sg(iue->target->dev, sg, scsi_sg_count(sc),
+ DMA_BIDIRECTIONAL);
+ if (!nsg) {
+ pr_err("fail to map %p %d\n", iue, scsi_sg_count(sc));
+ return 0;
+ }
+ len = min(scsi_bufflen(sc), be32_to_cpu(md->len));
+ } else {
+ len = be32_to_cpu(md->len);
+ }
+
+ err = rdma_io(sc, sg, nsg, md, 1, dir, len);
+
+ if (dma_map)
+ dma_unmap_sg(iue->target->dev, sg, nsg, DMA_BIDIRECTIONAL);
+
+ return err;
+}
+
+static int srp_indirect_data(struct scsi_cmnd *sc, struct srp_cmd *cmd,
+ struct srp_indirect_buf *id,
+ enum dma_data_direction dir, srp_rdma_t rdma_io,
+ int dma_map, int ext_desc)
+{
+ struct iu_entry *iue = NULL;
+ struct srp_direct_buf *md = NULL;
+ struct scatterlist dummy, *sg = NULL;
+ dma_addr_t token = 0;
+ int err = 0;
+ int nmd, nsg = 0, len;
+
+ if (dma_map || ext_desc) {
+ iue = (struct iu_entry *)sc->SCp.ptr;
+ sg = scsi_sglist(sc);
+ }
+
+ nmd = be32_to_cpu(id->table_desc.len) / sizeof(struct srp_direct_buf);
+
+ if ((dir == DMA_FROM_DEVICE && nmd == cmd->data_in_desc_cnt) ||
+ (dir == DMA_TO_DEVICE && nmd == cmd->data_out_desc_cnt)) {
+ md = &id->desc_list[0];
+ goto rdma;
+ }
+
+ if (ext_desc && dma_map) {
+ md = dma_alloc_coherent(iue->target->dev,
+ be32_to_cpu(id->table_desc.len),
+ &token, GFP_KERNEL);
+ if (!md) {
+ pr_err("Can't get dma memory %u\n",
+ be32_to_cpu(id->table_desc.len));
+ return -ENOMEM;
+ }
+
+ sg_init_one(&dummy, md, be32_to_cpu(id->table_desc.len));
+ sg_dma_address(&dummy) = token;
+ sg_dma_len(&dummy) = be32_to_cpu(id->table_desc.len);
+ err = rdma_io(sc, &dummy, 1, &id->table_desc, 1, DMA_TO_DEVICE,
+ be32_to_cpu(id->table_desc.len));
+ if (err) {
+ pr_err("Error copying indirect table %d\n", err);
+ goto free_mem;
+ }
+ } else {
+ pr_err("This command uses external indirect buffer\n");
+ return -EINVAL;
+ }
+
+rdma:
+ if (dma_map) {
+ nsg = dma_map_sg(iue->target->dev, sg, scsi_sg_count(sc),
+ DMA_BIDIRECTIONAL);
+ if (!nsg) {
+ pr_err("fail to map %p %d\n", iue, scsi_sg_count(sc));
+ err = -EIO;
+ goto free_mem;
+ }
+ len = min(scsi_bufflen(sc), be32_to_cpu(id->len));
+ } else {
+ len = be32_to_cpu(id->len);
+ }
+
+ err = rdma_io(sc, sg, nsg, md, nmd, dir, len);
+
+ if (dma_map)
+ dma_unmap_sg(iue->target->dev, sg, nsg, DMA_BIDIRECTIONAL);
+
+free_mem:
+ if (token && dma_map) {
+ dma_free_coherent(iue->target->dev,
+ be32_to_cpu(id->table_desc.len), md, token);
+ }
+ return err;
+}
+
+static int data_out_desc_size(struct srp_cmd *cmd)
+{
+ int size = 0;
+ u8 fmt = cmd->buf_fmt >> 4;
+
+ switch (fmt) {
+ case SRP_NO_DATA_DESC:
+ break;
+ case SRP_DATA_DESC_DIRECT:
+ size = sizeof(struct srp_direct_buf);
+ break;
+ case SRP_DATA_DESC_INDIRECT:
+ size = sizeof(struct srp_indirect_buf) +
+ sizeof(struct srp_direct_buf) * cmd->data_out_desc_cnt;
+ break;
+ default:
+ pr_err("client error. Invalid data_out_format %x\n", fmt);
+ break;
+ }
+ return size;
+}
+
+/*
+ * TODO: this can be called multiple times for a single command if it
+ * has very long data.
+ */
+int srp_transfer_data(struct scsi_cmnd *sc, struct srp_cmd *cmd,
+ srp_rdma_t rdma_io, int dma_map, int ext_desc)
+{
+ struct srp_direct_buf *md;
+ struct srp_indirect_buf *id;
+ enum dma_data_direction dir;
+ int offset, err = 0;
+ u8 format;
+
+ offset = cmd->add_cdb_len & ~3;
+
+ dir = srp_cmd_direction(cmd);
+ if (dir == DMA_FROM_DEVICE)
+ offset += data_out_desc_size(cmd);
+
+ if (dir == DMA_TO_DEVICE)
+ format = cmd->buf_fmt >> 4;
+ else
+ format = cmd->buf_fmt & ((1U << 4) - 1);
+
+ switch (format) {
+ case SRP_NO_DATA_DESC:
+ break;
+ case SRP_DATA_DESC_DIRECT:
+ md = (struct srp_direct_buf *)(cmd->add_data + offset);
+ err = srp_direct_data(sc, md, dir, rdma_io, dma_map, ext_desc);
+ break;
+ case SRP_DATA_DESC_INDIRECT:
+ id = (struct srp_indirect_buf *)(cmd->add_data + offset);
+ err = srp_indirect_data(sc, cmd, id, dir, rdma_io, dma_map,
+ ext_desc);
+ break;
+ default:
+ pr_err("Unknown format %d %x\n", dir, format);
+ err = -EINVAL;
+ }
+
+ return err;
+}
+EXPORT_SYMBOL_GPL(srp_transfer_data);
+
+u64 srp_data_length(struct srp_cmd *cmd, enum dma_data_direction dir)
+{
+ struct srp_direct_buf *md;
+ struct srp_indirect_buf *id;
+ u64 len = 0;
+ unsigned offset = cmd->add_cdb_len & ~3;
+ u8 fmt;
+
+ if (dir == DMA_TO_DEVICE) {
+ fmt = cmd->buf_fmt >> 4;
+ } else {
+ fmt = cmd->buf_fmt & ((1U << 4) - 1);
+ offset += data_out_desc_size(cmd);
+ }
+
+ switch (fmt) {
+ case SRP_NO_DATA_DESC:
+ break;
+ case SRP_DATA_DESC_DIRECT:
+ md = (struct srp_direct_buf *)(cmd->add_data + offset);
+ len = be32_to_cpu(md->len);
+ break;
+ case SRP_DATA_DESC_INDIRECT:
+ id = (struct srp_indirect_buf *)(cmd->add_data + offset);
+ len = be32_to_cpu(id->len);
+ break;
+ default:
+ pr_err("invalid data format %x\n", fmt);
+ break;
+ }
+ return len;
+}
+EXPORT_SYMBOL_GPL(srp_data_length);
+
+MODULE_DESCRIPTION("SCSI RDMA Protocol lib functions");
+MODULE_AUTHOR("FUJITA Tomonori");
+MODULE_LICENSE("GPL");
diff --git a/drivers/scsi/ibmvscsi/libsrp.h b/drivers/scsi/ibmvscsi/libsrp.h
new file mode 100644
index 0000000..bf9e30b
--- /dev/null
+++ b/drivers/scsi/ibmvscsi/libsrp.h
@@ -0,0 +1,91 @@
+#ifndef __LIBSRP_H__
+#define __LIBSRP_H__
+
+#include <linux/list.h>
+#include <linux/kfifo.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_host.h>
+#include <scsi/srp.h>
+#include <target/target_core_base.h>
+
+enum srp_task_attributes {
+ SRP_SIMPLE_TASK = 0,
+ SRP_HEAD_TASK = 1,
+ SRP_ORDERED_TASK = 2,
+ SRP_ACA_TASK = 4
+};
+
+enum iue_flags {
+ V_DIOVER,
+ V_WRITE,
+ V_LINKED,
+ V_FLYING,
+};
+
+enum {
+ SRP_TASK_MANAGEMENT_FUNCTION_COMPLETE = 0,
+ SRP_REQUEST_FIELDS_INVALID = 2,
+ SRP_TASK_MANAGEMENT_FUNCTION_NOT_SUPPORTED = 4,
+ SRP_TASK_MANAGEMENT_FUNCTION_FAILED = 5
+};
+
+struct srp_buf {
+ dma_addr_t dma;
+ void *buf;
+};
+
+struct srp_queue {
+ void *pool;
+ void *items;
+ struct kfifo queue;
+ spinlock_t lock;
+};
+
+struct srp_target {
+ struct Scsi_Host *shost;
+ struct se_device *tgt;
+ struct device *dev;
+
+ spinlock_t lock;
+ struct list_head cmd_queue;
+
+ size_t srp_iu_size;
+ struct srp_queue iu_queue;
+ size_t rx_ring_size;
+ struct srp_buf **rx_ring;
+
+ void *ldata;
+};
+
+struct iu_entry {
+ struct srp_target *target;
+
+ struct list_head ilist;
+ dma_addr_t remote_token;
+ unsigned long flags;
+
+ struct srp_buf *sbuf;
+};
+
+typedef int (srp_rdma_t)(struct scsi_cmnd *, struct scatterlist *, int,
+ struct srp_direct_buf *, int,
+ enum dma_data_direction, unsigned int);
+extern int srp_target_alloc(struct srp_target *, struct device *,
+ size_t, size_t);
+extern void srp_target_free(struct srp_target *);
+extern struct iu_entry *srp_iu_get(struct srp_target *);
+extern void srp_iu_put(struct iu_entry *);
+extern int srp_transfer_data(struct scsi_cmnd *, struct srp_cmd *, srp_rdma_t,
+ int, int);
+extern u64 srp_data_length(struct srp_cmd *cmd, enum dma_data_direction dir);
+static inline struct srp_target *host_to_srp_target(struct Scsi_Host *host)
+{
+ return (struct srp_target *)host->hostdata;
+}
+
+static inline int srp_cmd_direction(struct srp_cmd *cmd)
+{
+ return (cmd->buf_fmt >> 4) ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
+}
+
+#endif
diff --git a/drivers/scsi/libsrp.c b/drivers/scsi/libsrp.c
deleted file mode 100644
index 0e32abd..0000000
--- a/drivers/scsi/libsrp.c
+++ /dev/null
@@ -1,387 +0,0 @@
-/*******************************************************************************
- * SCSI RDMA Protocol lib functions
- *
- * Copyright (C) 2006 FUJITA Tomonori <tomof@....org>
- * Copyright (C) 2016 Bryant G. Ly <bgly@...ibm.com> IBM Corp.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- ***********************************************************************/
-
-#include <linux/printk.h>
-#include <linux/err.h>
-#include <linux/slab.h>
-#include <linux/kfifo.h>
-#include <linux/scatterlist.h>
-#include <linux/dma-mapping.h>
-#include <linux/module.h>
-#include <scsi/scsi.h>
-#include <scsi/scsi_cmnd.h>
-#include <scsi/scsi_tcq.h>
-#include <scsi/srp.h>
-#include <target/target_core_base.h>
-#include <scsi/libsrp.h>
-
-static int srp_iu_pool_alloc(struct srp_queue *q, size_t max,
- struct srp_buf **ring)
-{
- int i;
- struct iu_entry *iue;
-
- q->pool = kcalloc(max, sizeof(struct iu_entry *), GFP_KERNEL);
- if (!q->pool)
- return -ENOMEM;
- q->items = kcalloc(max, sizeof(struct iu_entry), GFP_KERNEL);
- if (!q->items)
- goto free_pool;
-
- spin_lock_init(&q->lock);
- kfifo_init(&q->queue, (void *) q->pool, max * sizeof(void *));
-
- for (i = 0, iue = q->items; i < max; i++) {
- kfifo_in(&q->queue, (void *) &iue, sizeof(void *));
- iue->sbuf = ring[i];
- iue++;
- }
- return 0;
-
-free_pool:
- kfree(q->pool);
- return -ENOMEM;
-}
-
-static void srp_iu_pool_free(struct srp_queue *q)
-{
- kfree(q->items);
- kfree(q->pool);
-}
-
-static struct srp_buf **srp_ring_alloc(struct device *dev,
- size_t max, size_t size)
-{
- int i;
- struct srp_buf **ring;
-
- ring = kcalloc(max, sizeof(struct srp_buf *), GFP_KERNEL);
- if (!ring)
- return NULL;
-
- for (i = 0; i < max; i++) {
- ring[i] = kzalloc(sizeof(struct srp_buf), GFP_KERNEL);
- if (!ring[i])
- goto out;
- ring[i]->buf = dma_alloc_coherent(dev, size, &ring[i]->dma,
- GFP_KERNEL);
- if (!ring[i]->buf)
- goto out;
- }
- return ring;
-
-out:
- for (i = 0; i < max && ring[i]; i++) {
- if (ring[i]->buf) {
- dma_free_coherent(dev, size, ring[i]->buf,
- ring[i]->dma);
- }
- kfree(ring[i]);
- }
- kfree(ring);
-
- return NULL;
-}
-
-static void srp_ring_free(struct device *dev, struct srp_buf **ring,
- size_t max, size_t size)
-{
- int i;
-
- for (i = 0; i < max; i++) {
- dma_free_coherent(dev, size, ring[i]->buf, ring[i]->dma);
- kfree(ring[i]);
- }
- kfree(ring);
-}
-
-int srp_target_alloc(struct srp_target *target, struct device *dev,
- size_t nr, size_t iu_size)
-{
- int err;
-
- spin_lock_init(&target->lock);
-
- target->dev = dev;
-
- target->srp_iu_size = iu_size;
- target->rx_ring_size = nr;
- target->rx_ring = srp_ring_alloc(target->dev, nr, iu_size);
- if (!target->rx_ring)
- return -ENOMEM;
- err = srp_iu_pool_alloc(&target->iu_queue, nr, target->rx_ring);
- if (err)
- goto free_ring;
-
- dev_set_drvdata(target->dev, target);
- return 0;
-
-free_ring:
- srp_ring_free(target->dev, target->rx_ring, nr, iu_size);
- return -ENOMEM;
-}
-EXPORT_SYMBOL_GPL(srp_target_alloc);
-
-void srp_target_free(struct srp_target *target)
-{
- dev_set_drvdata(target->dev, NULL);
- srp_ring_free(target->dev, target->rx_ring, target->rx_ring_size,
- target->srp_iu_size);
- srp_iu_pool_free(&target->iu_queue);
-}
-EXPORT_SYMBOL_GPL(srp_target_free);
-
-struct iu_entry *srp_iu_get(struct srp_target *target)
-{
- struct iu_entry *iue = NULL;
-
- if (kfifo_out_locked(&target->iu_queue.queue, (void *) &iue,
- sizeof(void *),
- &target->iu_queue.lock) != sizeof(void *)) {
- WARN_ONCE(1, "unexpected fifo state");
- return NULL;
- }
- if (!iue)
- return iue;
- iue->target = target;
- iue->flags = 0;
- return iue;
-}
-EXPORT_SYMBOL_GPL(srp_iu_get);
-
-void srp_iu_put(struct iu_entry *iue)
-{
- kfifo_in_locked(&iue->target->iu_queue.queue, (void *) &iue,
- sizeof(void *), &iue->target->iu_queue.lock);
-}
-EXPORT_SYMBOL_GPL(srp_iu_put);
-
-static int srp_direct_data(struct scsi_cmnd *sc, struct srp_direct_buf *md,
- enum dma_data_direction dir, srp_rdma_t rdma_io,
- int dma_map, int ext_desc)
-{
- struct iu_entry *iue = NULL;
- struct scatterlist *sg = NULL;
- int err, nsg = 0, len;
-
- if (dma_map) {
- iue = (struct iu_entry *) sc->SCp.ptr;
- sg = scsi_sglist(sc);
- nsg = dma_map_sg(iue->target->dev, sg, scsi_sg_count(sc),
- DMA_BIDIRECTIONAL);
- if (!nsg) {
- pr_err("libsrp: fail to map %p %d\n",
- iue, scsi_sg_count(sc));
- return 0;
- }
- len = min(scsi_bufflen(sc), be32_to_cpu(md->len));
- } else
- len = be32_to_cpu(md->len);
-
- err = rdma_io(sc, sg, nsg, md, 1, dir, len);
-
- if (dma_map)
- dma_unmap_sg(iue->target->dev, sg, nsg, DMA_BIDIRECTIONAL);
-
- return err;
-}
-
-static int srp_indirect_data(struct scsi_cmnd *sc, struct srp_cmd *cmd,
- struct srp_indirect_buf *id,
- enum dma_data_direction dir, srp_rdma_t rdma_io,
- int dma_map, int ext_desc)
-{
- struct iu_entry *iue = NULL;
- struct srp_direct_buf *md = NULL;
- struct scatterlist dummy, *sg = NULL;
- dma_addr_t token = 0;
- int err = 0;
- int nmd, nsg = 0, len;
-
- if (dma_map || ext_desc) {
- iue = (struct iu_entry *) sc->SCp.ptr;
- sg = scsi_sglist(sc);
- }
-
- nmd = be32_to_cpu(id->table_desc.len) / sizeof(struct srp_direct_buf);
-
- if ((dir == DMA_FROM_DEVICE && nmd == cmd->data_in_desc_cnt) ||
- (dir == DMA_TO_DEVICE && nmd == cmd->data_out_desc_cnt)) {
- md = &id->desc_list[0];
- goto rdma;
- }
-
- if (ext_desc && dma_map) {
- md = dma_alloc_coherent(iue->target->dev,
- be32_to_cpu(id->table_desc.len),
- &token, GFP_KERNEL);
- if (!md) {
- pr_err("libsrp: Can't get dma memory %u\n",
- be32_to_cpu(id->table_desc.len));
- return -ENOMEM;
- }
-
- sg_init_one(&dummy, md, be32_to_cpu(id->table_desc.len));
- sg_dma_address(&dummy) = token;
- sg_dma_len(&dummy) = be32_to_cpu(id->table_desc.len);
- err = rdma_io(sc, &dummy, 1, &id->table_desc, 1, DMA_TO_DEVICE,
- be32_to_cpu(id->table_desc.len));
- if (err) {
- pr_err("libsrp: Error copying indirect table %d\n",
- err);
- goto free_mem;
- }
- } else {
- pr_err("libsrp: This command uses external indirect buffer\n");
- return -EINVAL;
- }
-
-rdma:
- if (dma_map) {
- nsg = dma_map_sg(iue->target->dev, sg, scsi_sg_count(sc),
- DMA_BIDIRECTIONAL);
- if (!nsg) {
- pr_err("libsrp: fail to map %p %d\n",
- iue, scsi_sg_count(sc));
- err = -EIO;
- goto free_mem;
- }
- len = min(scsi_bufflen(sc), be32_to_cpu(id->len));
- } else
- len = be32_to_cpu(id->len);
-
- err = rdma_io(sc, sg, nsg, md, nmd, dir, len);
-
- if (dma_map)
- dma_unmap_sg(iue->target->dev, sg, nsg, DMA_BIDIRECTIONAL);
-
-free_mem:
- if (token && dma_map) {
- dma_free_coherent(iue->target->dev,
- be32_to_cpu(id->table_desc.len), md, token);
- }
- return err;
-}
-
-static int data_out_desc_size(struct srp_cmd *cmd)
-{
- int size = 0;
- u8 fmt = cmd->buf_fmt >> 4;
-
- switch (fmt) {
- case SRP_NO_DATA_DESC:
- break;
- case SRP_DATA_DESC_DIRECT:
- size = sizeof(struct srp_direct_buf);
- break;
- case SRP_DATA_DESC_INDIRECT:
- size = sizeof(struct srp_indirect_buf) +
- sizeof(struct srp_direct_buf) * cmd->data_out_desc_cnt;
- break;
- default:
- pr_err("libsrp: client error. Invalid data_out_format %x\n",
- fmt);
- break;
- }
- return size;
-}
-
-/*
- * TODO: this can be called multiple times for a single command if it
- * has very long data.
- */
-int srp_transfer_data(struct scsi_cmnd *sc, struct srp_cmd *cmd,
- srp_rdma_t rdma_io, int dma_map, int ext_desc)
-{
- struct srp_direct_buf *md;
- struct srp_indirect_buf *id;
- enum dma_data_direction dir;
- int offset, err = 0;
- u8 format;
-
- offset = cmd->add_cdb_len & ~3;
-
- dir = srp_cmd_direction(cmd);
- if (dir == DMA_FROM_DEVICE)
- offset += data_out_desc_size(cmd);
-
- if (dir == DMA_TO_DEVICE)
- format = cmd->buf_fmt >> 4;
- else
- format = cmd->buf_fmt & ((1U << 4) - 1);
-
- switch (format) {
- case SRP_NO_DATA_DESC:
- break;
- case SRP_DATA_DESC_DIRECT:
- md = (struct srp_direct_buf *)
- (cmd->add_data + offset);
- err = srp_direct_data(sc, md, dir, rdma_io, dma_map, ext_desc);
- break;
- case SRP_DATA_DESC_INDIRECT:
- id = (struct srp_indirect_buf *)
- (cmd->add_data + offset);
- err = srp_indirect_data(sc, cmd, id, dir, rdma_io, dma_map,
- ext_desc);
- break;
- default:
- pr_err("libsrp: Unknown format %d %x\n", dir, format);
- err = -EINVAL;
- }
-
- return err;
-}
-EXPORT_SYMBOL_GPL(srp_transfer_data);
-
-u64 srp_data_length(struct srp_cmd *cmd, enum dma_data_direction dir)
-{
- struct srp_direct_buf *md;
- struct srp_indirect_buf *id;
- u64 len = 0;
- unsigned offset = cmd->add_cdb_len & ~3;
- u8 fmt;
-
- if (dir == DMA_TO_DEVICE)
- fmt = cmd->buf_fmt >> 4;
- else {
- fmt = cmd->buf_fmt & ((1U << 4) - 1);
- offset += data_out_desc_size(cmd);
- }
-
- switch (fmt) {
- case SRP_NO_DATA_DESC:
- break;
- case SRP_DATA_DESC_DIRECT:
- md = (struct srp_direct_buf *) (cmd->add_data + offset);
- len = be32_to_cpu(md->len);
- break;
- case SRP_DATA_DESC_INDIRECT:
- id = (struct srp_indirect_buf *) (cmd->add_data + offset);
- len = be32_to_cpu(id->len);
- break;
- default:
- pr_err("invalid data format %x\n", fmt);
- break;
- }
- return len;
-}
-EXPORT_SYMBOL_GPL(srp_data_length);
-
-MODULE_DESCRIPTION("SCSI RDMA Protocol lib functions");
-MODULE_AUTHOR("FUJITA Tomonori");
-MODULE_LICENSE("GPL");
diff --git a/include/scsi/libsrp.h b/include/scsi/libsrp.h
deleted file mode 100644
index f9b2d8f..0000000
--- a/include/scsi/libsrp.h
+++ /dev/null
@@ -1,95 +0,0 @@
-#ifndef __LIBSRP_H__
-#define __LIBSRP_H__
-
-#include <linux/list.h>
-#include <linux/kfifo.h>
-#include <scsi/scsi_cmnd.h>
-#include <scsi/scsi_host.h>
-#include <scsi/srp.h>
-#include <target/target_core_base.h>
-
-enum srp_task_attributes {
- SRP_SIMPLE_TASK = 0,
- SRP_HEAD_TASK = 1,
- SRP_ORDERED_TASK = 2,
- SRP_ACA_TASK = 4
-};
-
-enum iue_flags {
- V_DIOVER,
- V_WRITE,
- V_LINKED,
- V_FLYING,
-};
-
-enum {
- SRP_TASK_MANAGEMENT_FUNCTION_COMPLETE = 0,
- SRP_REQUEST_FIELDS_INVALID = 2,
- SRP_TASK_MANAGEMENT_FUNCTION_NOT_SUPPORTED = 4,
- SRP_TASK_MANAGEMENT_FUNCTION_FAILED = 5
-};
-
-struct srp_buf {
- dma_addr_t dma;
- void *buf;
-};
-
-struct srp_queue {
- void *pool;
- void *items;
- struct kfifo queue;
- spinlock_t lock;
-};
-
-struct srp_target {
- struct Scsi_Host *shost;
- struct se_device *tgt;
- struct device *dev;
-
- spinlock_t lock;
- struct list_head cmd_queue;
-
- size_t srp_iu_size;
- struct srp_queue iu_queue;
- size_t rx_ring_size;
- struct srp_buf **rx_ring;
-
- void *ldata;
-};
-
-struct iu_entry {
- struct srp_target *target;
-
- struct list_head ilist;
- dma_addr_t remote_token;
- unsigned long flags;
-
- struct srp_buf *sbuf;
-};
-
-typedef int (srp_rdma_t)(struct scsi_cmnd *, struct scatterlist *, int,
- struct srp_direct_buf *, int,
- enum dma_data_direction, unsigned int);
-extern int srp_target_alloc(struct srp_target *, struct device *,
- size_t, size_t);
-extern void srp_target_free(struct srp_target *);
-
-extern struct iu_entry *srp_iu_get(struct srp_target *);
-extern void srp_iu_put(struct iu_entry *);
-
-extern int srp_transfer_data(struct scsi_cmnd *, struct srp_cmd *,
- srp_rdma_t, int, int);
-
-static inline struct srp_target *host_to_srp_target(struct Scsi_Host *host)
-{
- return (struct srp_target *) host->hostdata;
-}
-
-static inline int srp_cmd_direction(struct srp_cmd *cmd)
-{
- return (cmd->buf_fmt >> 4) ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
-}
-
-extern u64 srp_data_length(struct srp_cmd *cmd, enum dma_data_direction dir);
-
-#endif
--
2.5.4 (Apple Git-61)
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