IB/mthca: Semaphore to mutex conversions

Convert semaphores to mutexes in mthca.  Leave firmware command
interface poll_sem and event_sem as semaphores.

Signed-off-by: Roland Dreier <rolandd@cisco.com>

6 files changed, 37 insertions, 36 deletions

diff --git a/drivers/infiniband/hw/mthca/mthca_cmd.c b/drivers/infiniband/hw/mthca/mthca_cmd.c
index 69128fe60c53..f9b9b93dc501 100644
--- a/drivers/infiniband/hw/mthca/mthca_cmd.c
+++ b/drivers/infiniband/hw/mthca/mthca_cmd.c
@@ -199,7 +199,7 @@ static int mthca_cmd_post(struct mthca_dev *dev,
 {
         int err = 0;
 
-        down(&dev->cmd.hcr_sem);
+        mutex_lock(&dev->cmd.hcr_mutex);
 
         if (event) {
                 unsigned long end = jiffies + GO_BIT_TIMEOUT;
@@ -237,7 +237,7 @@ static int mthca_cmd_post(struct mthca_dev *dev,
                                                op),                       dev->hcr + 6 * 4);
 
 out:
-        up(&dev->cmd.hcr_sem);
+        mutex_unlock(&dev->cmd.hcr_mutex);
         return err;
 }
 
@@ -435,7 +435,7 @@ static int mthca_cmd_imm(struct mthca_dev *dev,
 
 int mthca_cmd_init(struct mthca_dev *dev)
 {
-        sema_init(&dev->cmd.hcr_sem, 1);
+        mutex_init(&dev->cmd.hcr_mutex);
         sema_init(&dev->cmd.poll_sem, 1);
         dev->cmd.use_events = 0;
 
diff --git a/drivers/infiniband/hw/mthca/mthca_dev.h b/drivers/infiniband/hw/mthca/mthca_dev.h
index a104ab041ea3..2a165fd06e57 100644
--- a/drivers/infiniband/hw/mthca/mthca_dev.h
+++ b/drivers/infiniband/hw/mthca/mthca_dev.h
@@ -44,6 +44,8 @@
 #include <linux/pci.h>
 #include <linux/dma-mapping.h>
 #include <linux/timer.h>
+#include <linux/mutex.h>
+
 #include <asm/semaphore.h>
 
 #include "mthca_provider.h"
@@ -111,7 +113,7 @@ enum {
 struct mthca_cmd {
         struct pci_pool          *pool;
         int                       use_events;
-        struct semaphore          hcr_sem;
+        struct mutex              hcr_mutex;
         struct semaphore          poll_sem;
         struct semaphore          event_sem;
         int                       max_cmds;
@@ -256,7 +258,7 @@ struct mthca_av_table {
 };
 
 struct mthca_mcg_table {
-        struct semaphore        sem;
+        struct mutex            mutex;
         struct mthca_alloc      alloc;
         struct mthca_icm_table *table;
 };
@@ -301,7 +303,7 @@ struct mthca_dev {
         u64              ddr_end;
 
         MTHCA_DECLARE_DOORBELL_LOCK(doorbell_lock)
-        struct semaphore cap_mask_mutex;
+        struct mutex cap_mask_mutex;
 
         void __iomem    *hcr;
         void __iomem    *kar;
diff --git a/drivers/infiniband/hw/mthca/mthca_mcg.c b/drivers/infiniband/hw/mthca/mthca_mcg.c
index 55ff5e5bcfef..321f11e707f2 100644
--- a/drivers/infiniband/hw/mthca/mthca_mcg.c
+++ b/drivers/infiniband/hw/mthca/mthca_mcg.c
@@ -154,7 +154,7 @@ int mthca_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
                 return PTR_ERR(mailbox);
         mgm = mailbox->buf;
 
-        down(&dev->mcg_table.sem);
+        mutex_lock(&dev->mcg_table.mutex);
 
         err = find_mgm(dev, gid->raw, mailbox, &hash, &prev, &index);
         if (err)
@@ -238,7 +238,7 @@ int mthca_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
                 BUG_ON(index < dev->limits.num_mgms);
                 mthca_free(&dev->mcg_table.alloc, index);
         }
-        up(&dev->mcg_table.sem);
+        mutex_unlock(&dev->mcg_table.mutex);
 
         mthca_free_mailbox(dev, mailbox);
         return err;
@@ -260,7 +260,7 @@ int mthca_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
                 return PTR_ERR(mailbox);
         mgm = mailbox->buf;
 
-        down(&dev->mcg_table.sem);
+        mutex_lock(&dev->mcg_table.mutex);
 
         err = find_mgm(dev, gid->raw, mailbox, &hash, &prev, &index);
         if (err)
@@ -365,7 +365,7 @@ int mthca_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
         }
 
  out:
-        up(&dev->mcg_table.sem);
+        mutex_unlock(&dev->mcg_table.mutex);
 
         mthca_free_mailbox(dev, mailbox);
         return err;
@@ -383,7 +383,7 @@ int __devinit mthca_init_mcg_table(struct mthca_dev *dev)
         if (err)
                 return err;
 
-        init_MUTEX(&dev->mcg_table.sem);
+        mutex_init(&dev->mcg_table.mutex);
 
         return 0;
 }
diff --git a/drivers/infiniband/hw/mthca/mthca_memfree.c b/drivers/infiniband/hw/mthca/mthca_memfree.c
index 9fb985a016e9..d709cb162a72 100644
--- a/drivers/infiniband/hw/mthca/mthca_memfree.c
+++ b/drivers/infiniband/hw/mthca/mthca_memfree.c
@@ -50,7 +50,7 @@ enum {
 };
 
 struct mthca_user_db_table {
-        struct semaphore mutex;
+        struct mutex mutex;
         struct {
                 u64                uvirt;
                 struct scatterlist mem;
@@ -158,7 +158,7 @@ int mthca_table_get(struct mthca_dev *dev, struct mthca_icm_table *table, int ob
         int ret = 0;
         u8 status;
 
-        down(&table->mutex);
+        mutex_lock(&table->mutex);
 
         if (table->icm[i]) {
                 ++table->icm[i]->refcount;
@@ -184,7 +184,7 @@ int mthca_table_get(struct mthca_dev *dev, struct mthca_icm_table *table, int ob
         ++table->icm[i]->refcount;
 
 out:
-        up(&table->mutex);
+        mutex_unlock(&table->mutex);
         return ret;
 }
 
@@ -198,7 +198,7 @@ void mthca_table_put(struct mthca_dev *dev, struct mthca_icm_table *table, int o
 
         i = (obj & (table->num_obj - 1)) * table->obj_size / MTHCA_TABLE_CHUNK_SIZE;
 
-        down(&table->mutex);
+        mutex_lock(&table->mutex);
 
         if (--table->icm[i]->refcount == 0) {
                 mthca_UNMAP_ICM(dev, table->virt + i * MTHCA_TABLE_CHUNK_SIZE,
@@ -207,7 +207,7 @@ void mthca_table_put(struct mthca_dev *dev, struct mthca_icm_table *table, int o
                 table->icm[i] = NULL;
         }
 
-        up(&table->mutex);
+        mutex_unlock(&table->mutex);
 }
 
 void *mthca_table_find(struct mthca_icm_table *table, int obj)
@@ -220,7 +220,7 @@ void *mthca_table_find(struct mthca_icm_table *table, int obj)
         if (!table->lowmem)
                 return NULL;
 
-        down(&table->mutex);
+        mutex_lock(&table->mutex);
 
         idx = (obj & (table->num_obj - 1)) * table->obj_size;
         icm = table->icm[idx / MTHCA_TABLE_CHUNK_SIZE];
@@ -240,7 +240,7 @@ void *mthca_table_find(struct mthca_icm_table *table, int obj)
         }
 
 out:
-        up(&table->mutex);
+        mutex_unlock(&table->mutex);
         return page ? lowmem_page_address(page) + offset : NULL;
 }
 
@@ -301,7 +301,7 @@ struct mthca_icm_table *mthca_alloc_icm_table(struct mthca_dev *dev,
         table->num_obj  = nobj;
         table->obj_size = obj_size;
         table->lowmem   = use_lowmem;
-        init_MUTEX(&table->mutex);
+        mutex_init(&table->mutex);
 
         for (i = 0; i < num_icm; ++i)
                 table->icm[i] = NULL;
@@ -380,7 +380,7 @@ int mthca_map_user_db(struct mthca_dev *dev, struct mthca_uar *uar,
         if (index < 0 || index > dev->uar_table.uarc_size / 8)
                 return -EINVAL;
 
-        down(&db_tab->mutex);
+        mutex_lock(&db_tab->mutex);
 
         i = index / MTHCA_DB_REC_PER_PAGE;
 
@@ -424,7 +424,7 @@ int mthca_map_user_db(struct mthca_dev *dev, struct mthca_uar *uar,
         db_tab->page[i].refcount = 1;
 
 out:
-        up(&db_tab->mutex);
+        mutex_unlock(&db_tab->mutex);
         return ret;
 }
 
@@ -439,11 +439,11 @@ void mthca_unmap_user_db(struct mthca_dev *dev, struct mthca_uar *uar,
          * pages until we clean up the whole db table.
          */
 
-        down(&db_tab->mutex);
+        mutex_lock(&db_tab->mutex);
 
         --db_tab->page[index / MTHCA_DB_REC_PER_PAGE].refcount;
 
-        up(&db_tab->mutex);
+        mutex_unlock(&db_tab->mutex);
 }
 
 struct mthca_user_db_table *mthca_init_user_db_tab(struct mthca_dev *dev)
@@ -460,7 +460,7 @@ struct mthca_user_db_table *mthca_init_user_db_tab(struct mthca_dev *dev)
         if (!db_tab)
                 return ERR_PTR(-ENOMEM);
 
-        init_MUTEX(&db_tab->mutex);
+        mutex_init(&db_tab->mutex);
         for (i = 0; i < npages; ++i) {
                 db_tab->page[i].refcount = 0;
                 db_tab->page[i].uvirt    = 0;
@@ -499,7 +499,7 @@ int mthca_alloc_db(struct mthca_dev *dev, enum mthca_db_type type,
         int ret = 0;
         u8 status;
 
-        down(&dev->db_tab->mutex);
+        mutex_lock(&dev->db_tab->mutex);
 
         switch (type) {
         case MTHCA_DB_TYPE_CQ_ARM:
@@ -585,7 +585,7 @@ found:
         *db = (__be32 *) &page->db_rec[j];
 
 out:
-        up(&dev->db_tab->mutex);
+        mutex_unlock(&dev->db_tab->mutex);
 
         return ret;
 }
@@ -601,7 +601,7 @@ void mthca_free_db(struct mthca_dev *dev, int type, int db_index)
 
         page = dev->db_tab->page + i;
 
-        down(&dev->db_tab->mutex);
+        mutex_lock(&dev->db_tab->mutex);
 
         page->db_rec[j] = 0;
         if (i >= dev->db_tab->min_group2)
@@ -624,7 +624,7 @@ void mthca_free_db(struct mthca_dev *dev, int type, int db_index)
                         ++dev->db_tab->min_group2;
         }
 
-        up(&dev->db_tab->mutex);
+        mutex_unlock(&dev->db_tab->mutex);
 }
 
 int mthca_init_db_tab(struct mthca_dev *dev)
@@ -638,7 +638,7 @@ int mthca_init_db_tab(struct mthca_dev *dev)
         if (!dev->db_tab)
                 return -ENOMEM;
 
-        init_MUTEX(&dev->db_tab->mutex);
+        mutex_init(&dev->db_tab->mutex);
 
         dev->db_tab->npages     = dev->uar_table.uarc_size / 4096;
         dev->db_tab->max_group1 = 0;
diff --git a/drivers/infiniband/hw/mthca/mthca_memfree.h b/drivers/infiniband/hw/mthca/mthca_memfree.h
index 4fdca26eea85..36f1141a08aa 100644
--- a/drivers/infiniband/hw/mthca/mthca_memfree.h
+++ b/drivers/infiniband/hw/mthca/mthca_memfree.h
@@ -39,8 +39,7 @@
 
 #include <linux/list.h>
 #include <linux/pci.h>
-
-#include <asm/semaphore.h>
+#include <linux/mutex.h>
 
 #define MTHCA_ICM_CHUNK_LEN \
         ((256 - sizeof (struct list_head) - 2 * sizeof (int)) /         \
@@ -64,7 +63,7 @@ struct mthca_icm_table {
         int               num_obj;
         int               obj_size;
         int               lowmem;
-        struct semaphore  mutex;
+        struct mutex      mutex;
         struct mthca_icm *icm[0];
 };
 
@@ -147,7 +146,7 @@ struct mthca_db_table {
         int                   max_group1;
         int                   min_group2;
         struct mthca_db_page *page;
-        struct semaphore      mutex;
+        struct mutex          mutex;
 };
 
 enum mthca_db_type {
diff --git a/drivers/infiniband/hw/mthca/mthca_provider.c b/drivers/infiniband/hw/mthca/mthca_provider.c
index 484a7e6b7f8c..e88e39aef85a 100644
--- a/drivers/infiniband/hw/mthca/mthca_provider.c
+++ b/drivers/infiniband/hw/mthca/mthca_provider.c
@@ -185,7 +185,7 @@ static int mthca_modify_port(struct ib_device *ibdev,
         int err;
         u8 status;
 
-        if (down_interruptible(&to_mdev(ibdev)->cap_mask_mutex))
+        if (mutex_lock_interruptible(&to_mdev(ibdev)->cap_mask_mutex))
                 return -ERESTARTSYS;
 
         err = mthca_query_port(ibdev, port, &attr);
@@ -207,7 +207,7 @@ static int mthca_modify_port(struct ib_device *ibdev,
         }
 
 out:
-        up(&to_mdev(ibdev)->cap_mask_mutex);
+        mutex_unlock(&to_mdev(ibdev)->cap_mask_mutex);
         return err;
 }
 
@@ -1185,7 +1185,7 @@ int mthca_register_device(struct mthca_dev *dev)
                 dev->ib_dev.post_recv     = mthca_tavor_post_receive;
         }
 
-        init_MUTEX(&dev->cap_mask_mutex);
+        mutex_init(&dev->cap_mask_mutex);
 
         ret = ib_register_device(&dev->ib_dev);
         if (ret)