summaryrefslogtreecommitdiff
path: root/drivers/net
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2014-08-14 11:09:05 -0600
committerLinus Torvalds <torvalds@linux-foundation.org>2014-08-14 11:09:05 -0600
commite3b1fd56f175526db42ae94c457f29c2fa810aca (patch)
tree3e2948ca44fb7fd5348244c2a83eef864b3110b4 /drivers/net
parent0680eb1f485ba5aac2ee02c9f0622239c9a4b16c (diff)
parentd087f6ad724dfbcdc3df8e0191b80d9d8d839e71 (diff)
Merge tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband
Pull infiniband/rdma updates from Roland Dreier: "Main set of InfiniBand/RDMA updates for 3.17 merge window: - MR reregistration support - MAD support for RMPP in userspace - iSER and SRP initiator updates - ocrdma hardware driver updates - other fixes..." * tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband: (52 commits) IB/srp: Fix return value check in srp_init_module() RDMA/ocrdma: report asic-id in query device RDMA/ocrdma: Update sli data structure for endianness RDMA/ocrdma: Obtain SL from device structure RDMA/uapi: Include socket.h in rdma_user_cm.h IB/srpt: Handle GID change events IB/mlx5: Use ARRAY_SIZE instead of sizeof/sizeof[0] IB/mlx4: Use ARRAY_SIZE instead of sizeof/sizeof[0] RDMA/amso1100: Check for integer overflow in c2_alloc_cq_buf() IPoIB: Remove unnecessary test for NULL before debugfs_remove() IB/mad: Add user space RMPP support IB/mad: add new ioctl to ABI to support new registration options IB/mad: Add dev_notice messages for various umad/mad registration failures IB/mad: Update module to [pr|dev]_* style print messages IB/ipoib: Avoid multicast join attempts with invalid P_key IB/umad: Update module to [pr|dev]_* style print messages IB/ipoib: Avoid flushing the workqueue from worker context IB/ipoib: Use P_Key change event instead of P_Key polling mechanism IB/ipath: Add P_Key change event support mlx4_core: Add support for secure-host and SMP firewall ...
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/ethernet/emulex/benet/be.h1
-rw-r--r--drivers/net/ethernet/emulex/benet/be_main.c1
-rw-r--r--drivers/net/ethernet/emulex/benet/be_roce.c18
-rw-r--r--drivers/net/ethernet/emulex/benet/be_roce.h3
-rw-r--r--drivers/net/ethernet/mellanox/mlx4/cmd.c9
-rw-r--r--drivers/net/ethernet/mellanox/mlx4/fw.c91
-rw-r--r--drivers/net/ethernet/mellanox/mlx4/main.c5
-rw-r--r--drivers/net/ethernet/mellanox/mlx4/mlx4.h3
-rw-r--r--drivers/net/ethernet/mellanox/mlx4/mr.c160
-rw-r--r--drivers/net/ethernet/mellanox/mlx4/resource_tracker.c26
10 files changed, 311 insertions, 6 deletions
diff --git a/drivers/net/ethernet/emulex/benet/be.h b/drivers/net/ethernet/emulex/benet/be.h
index 811f1351db7a..43e08d0bc3d3 100644
--- a/drivers/net/ethernet/emulex/benet/be.h
+++ b/drivers/net/ethernet/emulex/benet/be.h
@@ -897,5 +897,6 @@ void be_roce_dev_remove(struct be_adapter *);
*/
void be_roce_dev_open(struct be_adapter *);
void be_roce_dev_close(struct be_adapter *);
+void be_roce_dev_shutdown(struct be_adapter *);
#endif /* BE_H */
diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c
index db4ff14ff18f..9cdeda54674a 100644
--- a/drivers/net/ethernet/emulex/benet/be_main.c
+++ b/drivers/net/ethernet/emulex/benet/be_main.c
@@ -5014,6 +5014,7 @@ static void be_shutdown(struct pci_dev *pdev)
if (!adapter)
return;
+ be_roce_dev_shutdown(adapter);
cancel_delayed_work_sync(&adapter->work);
cancel_delayed_work_sync(&adapter->func_recovery_work);
diff --git a/drivers/net/ethernet/emulex/benet/be_roce.c b/drivers/net/ethernet/emulex/benet/be_roce.c
index 5bf16603a3e9..ef4672dc7357 100644
--- a/drivers/net/ethernet/emulex/benet/be_roce.c
+++ b/drivers/net/ethernet/emulex/benet/be_roce.c
@@ -120,7 +120,8 @@ static void _be_roce_dev_open(struct be_adapter *adapter)
{
if (ocrdma_drv && adapter->ocrdma_dev &&
ocrdma_drv->state_change_handler)
- ocrdma_drv->state_change_handler(adapter->ocrdma_dev, 0);
+ ocrdma_drv->state_change_handler(adapter->ocrdma_dev,
+ BE_DEV_UP);
}
void be_roce_dev_open(struct be_adapter *adapter)
@@ -136,7 +137,8 @@ static void _be_roce_dev_close(struct be_adapter *adapter)
{
if (ocrdma_drv && adapter->ocrdma_dev &&
ocrdma_drv->state_change_handler)
- ocrdma_drv->state_change_handler(adapter->ocrdma_dev, 1);
+ ocrdma_drv->state_change_handler(adapter->ocrdma_dev,
+ BE_DEV_DOWN);
}
void be_roce_dev_close(struct be_adapter *adapter)
@@ -148,6 +150,18 @@ void be_roce_dev_close(struct be_adapter *adapter)
}
}
+void be_roce_dev_shutdown(struct be_adapter *adapter)
+{
+ if (be_roce_supported(adapter)) {
+ mutex_lock(&be_adapter_list_lock);
+ if (ocrdma_drv && adapter->ocrdma_dev &&
+ ocrdma_drv->state_change_handler)
+ ocrdma_drv->state_change_handler(adapter->ocrdma_dev,
+ BE_DEV_SHUTDOWN);
+ mutex_unlock(&be_adapter_list_lock);
+ }
+}
+
int be_roce_register_driver(struct ocrdma_driver *drv)
{
struct be_adapter *dev;
diff --git a/drivers/net/ethernet/emulex/benet/be_roce.h b/drivers/net/ethernet/emulex/benet/be_roce.h
index a3d9e96c18eb..e6f7eb1a7d87 100644
--- a/drivers/net/ethernet/emulex/benet/be_roce.h
+++ b/drivers/net/ethernet/emulex/benet/be_roce.h
@@ -62,7 +62,8 @@ struct ocrdma_driver {
enum {
BE_DEV_UP = 0,
- BE_DEV_DOWN = 1
+ BE_DEV_DOWN = 1,
+ BE_DEV_SHUTDOWN = 2
};
/* APIs for RoCE driver to register callback handlers,
diff --git a/drivers/net/ethernet/mellanox/mlx4/cmd.c b/drivers/net/ethernet/mellanox/mlx4/cmd.c
index 5d940a26055c..65a4a0f88ea0 100644
--- a/drivers/net/ethernet/mellanox/mlx4/cmd.c
+++ b/drivers/net/ethernet/mellanox/mlx4/cmd.c
@@ -1311,6 +1311,15 @@ static struct mlx4_cmd_info cmd_info[] = {
.wrapper = mlx4_MAD_IFC_wrapper
},
{
+ .opcode = MLX4_CMD_MAD_DEMUX,
+ .has_inbox = false,
+ .has_outbox = false,
+ .out_is_imm = false,
+ .encode_slave_id = false,
+ .verify = NULL,
+ .wrapper = mlx4_CMD_EPERM_wrapper
+ },
+ {
.opcode = MLX4_CMD_QUERY_IF_STAT,
.has_inbox = false,
.has_outbox = true,
diff --git a/drivers/net/ethernet/mellanox/mlx4/fw.c b/drivers/net/ethernet/mellanox/mlx4/fw.c
index 688e1eabab29..494753e44ae3 100644
--- a/drivers/net/ethernet/mellanox/mlx4/fw.c
+++ b/drivers/net/ethernet/mellanox/mlx4/fw.c
@@ -136,7 +136,8 @@ static void dump_dev_cap_flags2(struct mlx4_dev *dev, u64 flags)
[7] = "FSM (MAC anti-spoofing) support",
[8] = "Dynamic QP updates support",
[9] = "Device managed flow steering IPoIB support",
- [10] = "TCP/IP offloads/flow-steering for VXLAN support"
+ [10] = "TCP/IP offloads/flow-steering for VXLAN support",
+ [11] = "MAD DEMUX (Secure-Host) support"
};
int i;
@@ -571,6 +572,7 @@ int mlx4_QUERY_DEV_CAP(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap)
#define QUERY_DEV_CAP_MAX_ICM_SZ_OFFSET 0xa0
#define QUERY_DEV_CAP_FW_REASSIGN_MAC 0x9d
#define QUERY_DEV_CAP_VXLAN 0x9e
+#define QUERY_DEV_CAP_MAD_DEMUX_OFFSET 0xb0
dev_cap->flags2 = 0;
mailbox = mlx4_alloc_cmd_mailbox(dev);
@@ -748,6 +750,11 @@ int mlx4_QUERY_DEV_CAP(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap)
MLX4_GET(dev_cap->max_counters, outbox,
QUERY_DEV_CAP_MAX_COUNTERS_OFFSET);
+ MLX4_GET(field32, outbox,
+ QUERY_DEV_CAP_MAD_DEMUX_OFFSET);
+ if (field32 & (1 << 0))
+ dev_cap->flags2 |= MLX4_DEV_CAP_FLAG2_MAD_DEMUX;
+
MLX4_GET(field32, outbox, QUERY_DEV_CAP_EXT_2_FLAGS_OFFSET);
if (field32 & (1 << 16))
dev_cap->flags2 |= MLX4_DEV_CAP_FLAG2_UPDATE_QP;
@@ -2016,3 +2023,85 @@ void mlx4_opreq_action(struct work_struct *work)
out:
mlx4_free_cmd_mailbox(dev, mailbox);
}
+
+static int mlx4_check_smp_firewall_active(struct mlx4_dev *dev,
+ struct mlx4_cmd_mailbox *mailbox)
+{
+#define MLX4_CMD_MAD_DEMUX_SET_ATTR_OFFSET 0x10
+#define MLX4_CMD_MAD_DEMUX_GETRESP_ATTR_OFFSET 0x20
+#define MLX4_CMD_MAD_DEMUX_TRAP_ATTR_OFFSET 0x40
+#define MLX4_CMD_MAD_DEMUX_TRAP_REPRESS_ATTR_OFFSET 0x70
+
+ u32 set_attr_mask, getresp_attr_mask;
+ u32 trap_attr_mask, traprepress_attr_mask;
+
+ MLX4_GET(set_attr_mask, mailbox->buf,
+ MLX4_CMD_MAD_DEMUX_SET_ATTR_OFFSET);
+ mlx4_dbg(dev, "SMP firewall set_attribute_mask = 0x%x\n",
+ set_attr_mask);
+
+ MLX4_GET(getresp_attr_mask, mailbox->buf,
+ MLX4_CMD_MAD_DEMUX_GETRESP_ATTR_OFFSET);
+ mlx4_dbg(dev, "SMP firewall getresp_attribute_mask = 0x%x\n",
+ getresp_attr_mask);
+
+ MLX4_GET(trap_attr_mask, mailbox->buf,
+ MLX4_CMD_MAD_DEMUX_TRAP_ATTR_OFFSET);
+ mlx4_dbg(dev, "SMP firewall trap_attribute_mask = 0x%x\n",
+ trap_attr_mask);
+
+ MLX4_GET(traprepress_attr_mask, mailbox->buf,
+ MLX4_CMD_MAD_DEMUX_TRAP_REPRESS_ATTR_OFFSET);
+ mlx4_dbg(dev, "SMP firewall traprepress_attribute_mask = 0x%x\n",
+ traprepress_attr_mask);
+
+ if (set_attr_mask && getresp_attr_mask && trap_attr_mask &&
+ traprepress_attr_mask)
+ return 1;
+
+ return 0;
+}
+
+int mlx4_config_mad_demux(struct mlx4_dev *dev)
+{
+ struct mlx4_cmd_mailbox *mailbox;
+ int secure_host_active;
+ int err;
+
+ /* Check if mad_demux is supported */
+ if (!(dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_MAD_DEMUX))
+ return 0;
+
+ mailbox = mlx4_alloc_cmd_mailbox(dev);
+ if (IS_ERR(mailbox)) {
+ mlx4_warn(dev, "Failed to allocate mailbox for cmd MAD_DEMUX");
+ return -ENOMEM;
+ }
+
+ /* Query mad_demux to find out which MADs are handled by internal sma */
+ err = mlx4_cmd_box(dev, 0, mailbox->dma, 0x01 /* subn mgmt class */,
+ MLX4_CMD_MAD_DEMUX_QUERY_RESTR, MLX4_CMD_MAD_DEMUX,
+ MLX4_CMD_TIME_CLASS_B, MLX4_CMD_NATIVE);
+ if (err) {
+ mlx4_warn(dev, "MLX4_CMD_MAD_DEMUX: query restrictions failed (%d)\n",
+ err);
+ goto out;
+ }
+
+ secure_host_active = mlx4_check_smp_firewall_active(dev, mailbox);
+
+ /* Config mad_demux to handle all MADs returned by the query above */
+ err = mlx4_cmd(dev, mailbox->dma, 0x01 /* subn mgmt class */,
+ MLX4_CMD_MAD_DEMUX_CONFIG, MLX4_CMD_MAD_DEMUX,
+ MLX4_CMD_TIME_CLASS_B, MLX4_CMD_NATIVE);
+ if (err) {
+ mlx4_warn(dev, "MLX4_CMD_MAD_DEMUX: configure failed (%d)\n", err);
+ goto out;
+ }
+
+ if (secure_host_active)
+ mlx4_warn(dev, "HCA operating in secure-host mode. SMP firewall activated.\n");
+out:
+ mlx4_free_cmd_mailbox(dev, mailbox);
+ return err;
+}
diff --git a/drivers/net/ethernet/mellanox/mlx4/main.c b/drivers/net/ethernet/mellanox/mlx4/main.c
index 80b8c5f30e4e..0158689906fd 100644
--- a/drivers/net/ethernet/mellanox/mlx4/main.c
+++ b/drivers/net/ethernet/mellanox/mlx4/main.c
@@ -1853,6 +1853,11 @@ static int mlx4_setup_hca(struct mlx4_dev *dev)
mlx4_err(dev, "Failed to initialize multicast group table, aborting\n");
goto err_mr_table_free;
}
+ err = mlx4_config_mad_demux(dev);
+ if (err) {
+ mlx4_err(dev, "Failed in config_mad_demux, aborting\n");
+ goto err_mcg_table_free;
+ }
}
err = mlx4_init_eq_table(dev);
diff --git a/drivers/net/ethernet/mellanox/mlx4/mlx4.h b/drivers/net/ethernet/mellanox/mlx4/mlx4.h
index 13fbcd03c3e4..b508c7887ef8 100644
--- a/drivers/net/ethernet/mellanox/mlx4/mlx4.h
+++ b/drivers/net/ethernet/mellanox/mlx4/mlx4.h
@@ -274,6 +274,8 @@ struct mlx4_icm_table {
#define MLX4_MPT_FLAG_PHYSICAL (1 << 9)
#define MLX4_MPT_FLAG_REGION (1 << 8)
+#define MLX4_MPT_PD_MASK (0x1FFFFUL)
+#define MLX4_MPT_PD_VF_MASK (0xFE0000UL)
#define MLX4_MPT_PD_FLAG_FAST_REG (1 << 27)
#define MLX4_MPT_PD_FLAG_RAE (1 << 28)
#define MLX4_MPT_PD_FLAG_EN_INV (3 << 24)
@@ -1306,5 +1308,6 @@ void mlx4_init_quotas(struct mlx4_dev *dev);
int mlx4_get_slave_num_gids(struct mlx4_dev *dev, int slave, int port);
/* Returns the VF index of slave */
int mlx4_get_vf_indx(struct mlx4_dev *dev, int slave);
+int mlx4_config_mad_demux(struct mlx4_dev *dev);
#endif /* MLX4_H */
diff --git a/drivers/net/ethernet/mellanox/mlx4/mr.c b/drivers/net/ethernet/mellanox/mlx4/mr.c
index 2839abb878a6..7d717eccb7b0 100644
--- a/drivers/net/ethernet/mellanox/mlx4/mr.c
+++ b/drivers/net/ethernet/mellanox/mlx4/mr.c
@@ -298,6 +298,131 @@ static int mlx4_HW2SW_MPT(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox
MLX4_CMD_TIME_CLASS_B, MLX4_CMD_WRAPPED);
}
+int mlx4_mr_hw_get_mpt(struct mlx4_dev *dev, struct mlx4_mr *mmr,
+ struct mlx4_mpt_entry ***mpt_entry)
+{
+ int err;
+ int key = key_to_hw_index(mmr->key) & (dev->caps.num_mpts - 1);
+ struct mlx4_cmd_mailbox *mailbox = NULL;
+
+ /* Make sure that at this point we have single-threaded access only */
+
+ if (mmr->enabled != MLX4_MPT_EN_HW)
+ return -EINVAL;
+
+ err = mlx4_HW2SW_MPT(dev, NULL, key);
+
+ if (err) {
+ mlx4_warn(dev, "HW2SW_MPT failed (%d).", err);
+ mlx4_warn(dev, "Most likely the MR has MWs bound to it.\n");
+ return err;
+ }
+
+ mmr->enabled = MLX4_MPT_EN_SW;
+
+ if (!mlx4_is_mfunc(dev)) {
+ **mpt_entry = mlx4_table_find(
+ &mlx4_priv(dev)->mr_table.dmpt_table,
+ key, NULL);
+ } else {
+ mailbox = mlx4_alloc_cmd_mailbox(dev);
+ if (IS_ERR_OR_NULL(mailbox))
+ return PTR_ERR(mailbox);
+
+ err = mlx4_cmd_box(dev, 0, mailbox->dma, key,
+ 0, MLX4_CMD_QUERY_MPT,
+ MLX4_CMD_TIME_CLASS_B,
+ MLX4_CMD_WRAPPED);
+
+ if (err)
+ goto free_mailbox;
+
+ *mpt_entry = (struct mlx4_mpt_entry **)&mailbox->buf;
+ }
+
+ if (!(*mpt_entry) || !(**mpt_entry)) {
+ err = -ENOMEM;
+ goto free_mailbox;
+ }
+
+ return 0;
+
+free_mailbox:
+ mlx4_free_cmd_mailbox(dev, mailbox);
+ return err;
+}
+EXPORT_SYMBOL_GPL(mlx4_mr_hw_get_mpt);
+
+int mlx4_mr_hw_write_mpt(struct mlx4_dev *dev, struct mlx4_mr *mmr,
+ struct mlx4_mpt_entry **mpt_entry)
+{
+ int err;
+
+ if (!mlx4_is_mfunc(dev)) {
+ /* Make sure any changes to this entry are flushed */
+ wmb();
+
+ *(u8 *)(*mpt_entry) = MLX4_MPT_STATUS_HW;
+
+ /* Make sure the new status is written */
+ wmb();
+
+ err = mlx4_SYNC_TPT(dev);
+ } else {
+ int key = key_to_hw_index(mmr->key) & (dev->caps.num_mpts - 1);
+
+ struct mlx4_cmd_mailbox *mailbox =
+ container_of((void *)mpt_entry, struct mlx4_cmd_mailbox,
+ buf);
+
+ err = mlx4_SW2HW_MPT(dev, mailbox, key);
+ }
+
+ mmr->pd = be32_to_cpu((*mpt_entry)->pd_flags) & MLX4_MPT_PD_MASK;
+ if (!err)
+ mmr->enabled = MLX4_MPT_EN_HW;
+ return err;
+}
+EXPORT_SYMBOL_GPL(mlx4_mr_hw_write_mpt);
+
+void mlx4_mr_hw_put_mpt(struct mlx4_dev *dev,
+ struct mlx4_mpt_entry **mpt_entry)
+{
+ if (mlx4_is_mfunc(dev)) {
+ struct mlx4_cmd_mailbox *mailbox =
+ container_of((void *)mpt_entry, struct mlx4_cmd_mailbox,
+ buf);
+ mlx4_free_cmd_mailbox(dev, mailbox);
+ }
+}
+EXPORT_SYMBOL_GPL(mlx4_mr_hw_put_mpt);
+
+int mlx4_mr_hw_change_pd(struct mlx4_dev *dev, struct mlx4_mpt_entry *mpt_entry,
+ u32 pdn)
+{
+ u32 pd_flags = be32_to_cpu(mpt_entry->pd_flags);
+ /* The wrapper function will put the slave's id here */
+ if (mlx4_is_mfunc(dev))
+ pd_flags &= ~MLX4_MPT_PD_VF_MASK;
+ mpt_entry->pd_flags = cpu_to_be32((pd_flags & ~MLX4_MPT_PD_MASK) |
+ (pdn & MLX4_MPT_PD_MASK)
+ | MLX4_MPT_PD_FLAG_EN_INV);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(mlx4_mr_hw_change_pd);
+
+int mlx4_mr_hw_change_access(struct mlx4_dev *dev,
+ struct mlx4_mpt_entry *mpt_entry,
+ u32 access)
+{
+ u32 flags = (be32_to_cpu(mpt_entry->flags) & ~MLX4_PERM_MASK) |
+ (access & MLX4_PERM_MASK);
+
+ mpt_entry->flags = cpu_to_be32(flags);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(mlx4_mr_hw_change_access);
+
static int mlx4_mr_alloc_reserved(struct mlx4_dev *dev, u32 mridx, u32 pd,
u64 iova, u64 size, u32 access, int npages,
int page_shift, struct mlx4_mr *mr)
@@ -463,6 +588,41 @@ int mlx4_mr_free(struct mlx4_dev *dev, struct mlx4_mr *mr)
}
EXPORT_SYMBOL_GPL(mlx4_mr_free);
+void mlx4_mr_rereg_mem_cleanup(struct mlx4_dev *dev, struct mlx4_mr *mr)
+{
+ mlx4_mtt_cleanup(dev, &mr->mtt);
+}
+EXPORT_SYMBOL_GPL(mlx4_mr_rereg_mem_cleanup);
+
+int mlx4_mr_rereg_mem_write(struct mlx4_dev *dev, struct mlx4_mr *mr,
+ u64 iova, u64 size, int npages,
+ int page_shift, struct mlx4_mpt_entry *mpt_entry)
+{
+ int err;
+
+ mpt_entry->start = cpu_to_be64(mr->iova);
+ mpt_entry->length = cpu_to_be64(mr->size);
+ mpt_entry->entity_size = cpu_to_be32(mr->mtt.page_shift);
+
+ err = mlx4_mtt_init(dev, npages, page_shift, &mr->mtt);
+ if (err)
+ return err;
+
+ if (mr->mtt.order < 0) {
+ mpt_entry->flags |= cpu_to_be32(MLX4_MPT_FLAG_PHYSICAL);
+ mpt_entry->mtt_addr = 0;
+ } else {
+ mpt_entry->mtt_addr = cpu_to_be64(mlx4_mtt_addr(dev,
+ &mr->mtt));
+ if (mr->mtt.page_shift == 0)
+ mpt_entry->mtt_sz = cpu_to_be32(1 << mr->mtt.order);
+ }
+ mr->enabled = MLX4_MPT_EN_SW;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(mlx4_mr_rereg_mem_write);
+
int mlx4_mr_enable(struct mlx4_dev *dev, struct mlx4_mr *mr)
{
struct mlx4_cmd_mailbox *mailbox;
diff --git a/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c b/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c
index 0efc1368e5a8..1089367fed22 100644
--- a/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c
+++ b/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c
@@ -2613,12 +2613,34 @@ int mlx4_QUERY_MPT_wrapper(struct mlx4_dev *dev, int slave,
if (err)
return err;
- if (mpt->com.from_state != RES_MPT_HW) {
+ if (mpt->com.from_state == RES_MPT_MAPPED) {
+ /* In order to allow rereg in SRIOV, we need to alter the MPT entry. To do
+ * that, the VF must read the MPT. But since the MPT entry memory is not
+ * in the VF's virtual memory space, it must use QUERY_MPT to obtain the
+ * entry contents. To guarantee that the MPT cannot be changed, the driver
+ * must perform HW2SW_MPT before this query and return the MPT entry to HW
+ * ownership fofollowing the change. The change here allows the VF to
+ * perform QUERY_MPT also when the entry is in SW ownership.
+ */
+ struct mlx4_mpt_entry *mpt_entry = mlx4_table_find(
+ &mlx4_priv(dev)->mr_table.dmpt_table,
+ mpt->key, NULL);
+
+ if (NULL == mpt_entry || NULL == outbox->buf) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ memcpy(outbox->buf, mpt_entry, sizeof(*mpt_entry));
+
+ err = 0;
+ } else if (mpt->com.from_state == RES_MPT_HW) {
+ err = mlx4_DMA_wrapper(dev, slave, vhcr, inbox, outbox, cmd);
+ } else {
err = -EBUSY;
goto out;
}
- err = mlx4_DMA_wrapper(dev, slave, vhcr, inbox, outbox, cmd);
out:
put_res(dev, slave, id, RES_MPT);