libsrp: removal

Remove the libsrp module which was only used by the now removed ibmvstgt
driver.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>

3 files changed, 0 insertions, 458 deletions

diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig
index 10b3cc885d9c..67d1ac342451 100644
--- a/drivers/scsi/Kconfig
+++ b/drivers/scsi/Kconfig
@@ -1722,16 +1722,6 @@ config SCSI_PM8001
           This driver supports PMC-Sierra PCIE SAS/SATA 8x6G SPC 8001 chip
           based host adapters.
 
-config SCSI_SRP
-        tristate "SCSI RDMA Protocol helper library"
-        depends on SCSI && PCI
-        select SCSI_TGT
-        help
-          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.
-
 config SCSI_BFA_FC
         tristate "Brocade BFA Fibre Channel Support"
         depends on PCI && SCSI
diff --git a/drivers/scsi/Makefile b/drivers/scsi/Makefile
index aacad2f077ea..e069e95a2f96 100644
--- a/drivers/scsi/Makefile
+++ b/drivers/scsi/Makefile
@@ -127,7 +127,6 @@ 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_IBMVSCSI)     += ibmvscsi/
 obj-$(CONFIG_SCSI_IBMVFC)       += ibmvscsi/
 obj-$(CONFIG_SCSI_HPTIOP)       += hptiop.o
diff --git a/drivers/scsi/libsrp.c b/drivers/scsi/libsrp.c
deleted file mode 100644
index 0707ecdbaa32..000000000000
--- a/drivers/scsi/libsrp.c
+++ /dev/null
@@ -1,447 +0,0 @@
-/*
- * SCSI RDMA Protocol lib functions
- *
- * Copyright (C) 2006 FUJITA Tomonori <tomof@acm.org>
- *
- * 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.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
- * 02110-1301 USA
- */
-#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/scsi_tgt.h>
-#include <scsi/srp.h>
-#include <scsi/libsrp.h>
-
-enum srp_task_attributes {
-        SRP_SIMPLE_TASK = 0,
-        SRP_HEAD_TASK = 1,
-        SRP_ORDERED_TASK = 2,
-        SRP_ACA_TASK = 4
-};
-
-/* tmp - will replace with SCSI logging stuff */
-#define eprintk(fmt, args...)                                   \
-do {                                                            \
-        printk("%s(%d) " fmt, __func__, __LINE__, ##args);      \
-} while (0)
-/* #define dprintk eprintk */
-#define dprintk(fmt, args...)
-
-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;
-
-        kfree(q->items);
-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);
-        INIT_LIST_HEAD(&target->cmd_queue);
-
-        target->dev = dev;
-        dev_set_drvdata(target->dev, target);
-
-        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;
-
-        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)
-{
-        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;
-        INIT_LIST_HEAD(&iue->ilist);
-        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);
-
-                dprintk("%p %u %u %d\n", iue, scsi_bufflen(sc),
-                        md->len, scsi_sg_count(sc));
-
-                nsg = dma_map_sg(iue->target->dev, sg, scsi_sg_count(sc),
-                                 DMA_BIDIRECTIONAL);
-                if (!nsg) {
-                        printk("fail to map %p %d\n", iue, scsi_sg_count(sc));
-                        return 0;
-                }
-                len = min(scsi_bufflen(sc), md->len);
-        } else
-                len = 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);
-
-                dprintk("%p %u %u %d %d\n",
-                        iue, scsi_bufflen(sc), id->len,
-                        cmd->data_in_desc_cnt, cmd->data_out_desc_cnt);
-        }
-
-        nmd = 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, id->table_desc.len,
-                                &token, GFP_KERNEL);
-                if (!md) {
-                        eprintk("Can't get dma memory %u\n", id->table_desc.len);
-                        return -ENOMEM;
-                }
-
-                sg_init_one(&dummy, md, id->table_desc.len);
-                sg_dma_address(&dummy) = token;
-                sg_dma_len(&dummy) = id->table_desc.len;
-                err = rdma_io(sc, &dummy, 1, &id->table_desc, 1, DMA_TO_DEVICE,
-                              id->table_desc.len);
-                if (err) {
-                        eprintk("Error copying indirect table %d\n", err);
-                        goto free_mem;
-                }
-        } else {
-                eprintk("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) {
-                        eprintk("fail to map %p %d\n", iue, scsi_sg_count(sc));
-                        err = -EIO;
-                        goto free_mem;
-                }
-                len = min(scsi_bufflen(sc), id->len);
-        } else
-                len = 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, 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:
-                eprintk("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:
-                eprintk("Unknown format %d %x\n", dir, format);
-                err = -EINVAL;
-        }
-
-        return err;
-}
-EXPORT_SYMBOL_GPL(srp_transfer_data);
-
-static int vscsis_data_length(struct srp_cmd *cmd, enum dma_data_direction dir)
-{
-        struct srp_direct_buf *md;
-        struct srp_indirect_buf *id;
-        int len = 0, 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 = md->len;
-                break;
-        case SRP_DATA_DESC_INDIRECT:
-                id = (struct srp_indirect_buf *) (cmd->add_data + offset);
-                len = id->len;
-                break;
-        default:
-                eprintk("invalid data format %x\n", fmt);
-                break;
-        }
-        return len;
-}
-
-int srp_cmd_queue(struct Scsi_Host *shost, struct srp_cmd *cmd, void *info,
-                  u64 itn_id, u64 addr)
-{
-        enum dma_data_direction dir;
-        struct scsi_cmnd *sc;
-        int tag, len, err;
-
-        switch (cmd->task_attr) {
-        case SRP_SIMPLE_TASK:
-                tag = MSG_SIMPLE_TAG;
-                break;
-        case SRP_ORDERED_TASK:
-                tag = MSG_ORDERED_TAG;
-                break;
-        case SRP_HEAD_TASK:
-                tag = MSG_HEAD_TAG;
-                break;
-        default:
-                eprintk("Task attribute %d not supported\n", cmd->task_attr);
-                tag = MSG_ORDERED_TAG;
-        }
-
-        dir = srp_cmd_direction(cmd);
-        len = vscsis_data_length(cmd, dir);
-
-        dprintk("%p %x %lx %d %d %d %llx\n", info, cmd->cdb[0],
-                cmd->lun, dir, len, tag, (unsigned long long) cmd->tag);
-
-        sc = scsi_host_get_command(shost, dir, GFP_KERNEL);
-        if (!sc)
-                return -ENOMEM;
-
-        sc->SCp.ptr = info;
-        memcpy(sc->cmnd, cmd->cdb, MAX_COMMAND_SIZE);
-        sc->sdb.length = len;
-        sc->sdb.table.sgl = (void *) (unsigned long) addr;
-        sc->tag = tag;
-        err = scsi_tgt_queue_command(sc, itn_id, (struct scsi_lun *)&cmd->lun,
-                                     cmd->tag);
-        if (err)
-                scsi_host_put_command(shost, sc);
-
-        return err;
-}
-EXPORT_SYMBOL_GPL(srp_cmd_queue);
-
-MODULE_DESCRIPTION("SCSI RDMA Protocol lib functions");
-MODULE_AUTHOR("FUJITA Tomonori");
-MODULE_LICENSE("GPL");