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Date: Thu, 04 Feb 2010 17:56:15 +0200
From: Yevgeny Petrilin <yevgenyp@...lanox.co.il>
To: Roland Dreier <rdreier@...co.com>
CC: general@...ts.openfabrics.org, netdev@...r.kernel.org,
liranl@...lanox.co.il, tziporet@...lanox.co.il
Subject: [PATCH 14/23 v3] mlx4_core: Determine primary physical function
In multifunctional devices, only the primary function would succeed
to execute QUERY_FW command, all other would fail with _EACCES error.
A physical function that is not primary would behave as slave.
Signed-off-by: Yevgeny Petrilin <yevgenyp@...lanox.co.il>
---
drivers/net/mlx4/fw.c | 4 ++++
drivers/net/mlx4/fw.h | 1 +
drivers/net/mlx4/main.c | 18 +++++++++++++++---
include/linux/mlx4/device.h | 2 ++
4 files changed, 22 insertions(+), 3 deletions(-)
diff --git a/drivers/net/mlx4/fw.c b/drivers/net/mlx4/fw.c
index 066db0e..3c6601a 100644
--- a/drivers/net/mlx4/fw.c
+++ b/drivers/net/mlx4/fw.c
@@ -313,6 +313,10 @@ int mlx4_QUERY_DEV_CAP(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap)
dev_cap->max_rdma_global = 1 << (field & 0x3f);
MLX4_GET(field, outbox, QUERY_DEV_CAP_ACK_DELAY_OFFSET);
dev_cap->local_ca_ack_delay = field & 0x1f;
+ MLX4_GET(field, outbox, QUERY_DEV_CAP_MTU_WIDTH_OFFSET);
+ dev_cap->pf_num = field;
+ if (dev_cap->pf_num > 1)
+ dev->flags |= MLX4_FLAG_MASTER;
MLX4_GET(field, outbox, QUERY_DEV_CAP_VL_PORT_OFFSET);
dev_cap->num_ports = field & 0xf;
MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_MSG_SZ_OFFSET);
diff --git a/drivers/net/mlx4/fw.h b/drivers/net/mlx4/fw.h
index f0d4f1c..59acfd0 100644
--- a/drivers/net/mlx4/fw.h
+++ b/drivers/net/mlx4/fw.h
@@ -64,6 +64,7 @@ struct mlx4_dev_cap {
int max_responder_per_qp;
int max_rdma_global;
int local_ca_ack_delay;
+ int pf_num;
int num_ports;
u32 max_msg_sz;
int ib_mtu[MLX4_MAX_PORTS + 1];
diff --git a/drivers/net/mlx4/main.c b/drivers/net/mlx4/main.c
index 37293ca..9f9292a 100644
--- a/drivers/net/mlx4/main.c
+++ b/drivers/net/mlx4/main.c
@@ -191,6 +191,7 @@ static int mlx4_dev_cap(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap)
return -ENODEV;
}
+ dev->caps.pf_num = dev_cap->pf_num;
dev->caps.num_ports = dev_cap->num_ports;
for (i = 1; i <= dev->caps.num_ports; ++i) {
dev->caps.vl_cap[i] = dev_cap->max_vl[i];
@@ -867,7 +868,8 @@ static int mlx4_init_hca(struct mlx4_dev *dev)
err = mlx4_QUERY_FW(dev); /* TODO: verify FW version in slaves as well */
if (err) {
if (err == -EACCES)
- mlx4_info(dev, "non-primary physical function, skipping.\n");
+ mlx4_info(dev, "Non-primary physical function, "
+ "Running in slave mode.\n");
else {
mlx4_err(dev, "QUERY_FW command failed, aborting.\n");
if (mlx4_is_master(dev))
@@ -1320,6 +1322,7 @@ static int __mlx4_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
}
}
+slave_start:
if (mlx4_cmd_init(dev)) {
mlx4_err(dev, "Failed to init command interface, aborting.\n");
goto err_sriov;
@@ -1335,8 +1338,17 @@ static int __mlx4_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
}
err = mlx4_init_hca(dev);
- if (err)
- goto err_cmd;
+ if (err) {
+ if (err == -EACCES) {
+ /* Not primary Physical function
+ * Running in slave mode */
+ mlx4_cmd_cleanup(dev);
+ dev->flags |= MLX4_FLAG_SLAVE;
+ dev->flags &= ~MLX4_FLAG_MASTER;
+ goto slave_start;
+ } else
+ goto err_cmd;
+ }
/* In master functions, the communication channel must be initialized after obtaining
* its address from fw */
diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h
index 73a1856..38de006 100644
--- a/include/linux/mlx4/device.h
+++ b/include/linux/mlx4/device.h
@@ -45,6 +45,7 @@ enum {
MLX4_FLAG_MASTER = 1 << 2,
MLX4_FLAG_SLAVE = 1 << 3,
MLX4_FLAG_SRIOV = 1 << 4,
+ MLX4_FLAG_PF = 1 << 5,
};
enum {
@@ -183,6 +184,7 @@ static inline u64 mlx4_fw_ver(u64 major, u64 minor, u64 subminor)
struct mlx4_caps {
u64 fw_ver;
+ int pf_num;
int num_ports;
int vl_cap[MLX4_MAX_PORTS + 1];
int ib_mtu_cap[MLX4_MAX_PORTS + 1];
--
1.6.1.3
--
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