From e2c76824ca16a3e8443cc7b26abcb21af7c27b10 Mon Sep 17 00:00:00 2001 From: Jack Morgenstein Date: Fri, 3 Aug 2012 08:40:41 +0000 Subject: [PATCH] mlx4_core: Add proxy and tunnel QPs to the reserved QP area In addition, pass the proxy and tunnel QP numbers to slaves so the driver can perform special QP paravirtualization. Signed-off-by: Jack Morgenstein Signed-off-by: Roland Dreier --- drivers/net/ethernet/mellanox/mlx4/fw.c | 14 +++++++++ drivers/net/ethernet/mellanox/mlx4/fw.h | 3 ++ drivers/net/ethernet/mellanox/mlx4/main.c | 5 ++++ drivers/net/ethernet/mellanox/mlx4/qp.c | 29 +++++++++++++++++-- .../ethernet/mellanox/mlx4/resource_tracker.c | 3 +- include/linux/mlx4/device.h | 13 ++++++++- 6 files changed, 62 insertions(+), 5 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlx4/fw.c b/drivers/net/ethernet/mellanox/mlx4/fw.c index c69648487321..35be90178bef 100644 --- a/drivers/net/ethernet/mellanox/mlx4/fw.c +++ b/drivers/net/ethernet/mellanox/mlx4/fw.c @@ -184,6 +184,8 @@ int mlx4_QUERY_FUNC_CAP_wrapper(struct mlx4_dev *dev, int slave, #define QUERY_FUNC_CAP_MCG_QUOTA_OFFSET 0x28 #define QUERY_FUNC_CAP_MAX_EQ_OFFSET 0x2c #define QUERY_FUNC_CAP_RESERVED_EQ_OFFSET 0X30 +#define QUERY_FUNC_CAP_BASE_TUNNEL_QPN_OFFSET 0x44 +#define QUERY_FUNC_CAP_BASE_PROXY_QPN_OFFSET 0x48 #define QUERY_FUNC_CAP_FMR_FLAG 0x80 #define QUERY_FUNC_CAP_FLAG_RDMA 0x40 @@ -247,6 +249,12 @@ int mlx4_QUERY_FUNC_CAP_wrapper(struct mlx4_dev *dev, int slave, size = dev->caps.num_mgms + dev->caps.num_amgms; MLX4_PUT(outbox->buf, size, QUERY_FUNC_CAP_MCG_QUOTA_OFFSET); + size = dev->caps.base_tunnel_sqpn + 8 * slave; + MLX4_PUT(outbox->buf, size, QUERY_FUNC_CAP_BASE_TUNNEL_QPN_OFFSET); + + size = dev->caps.sqp_start + 8 * slave; + MLX4_PUT(outbox->buf, size, QUERY_FUNC_CAP_BASE_PROXY_QPN_OFFSET); + } else err = -EINVAL; @@ -312,6 +320,12 @@ int mlx4_QUERY_FUNC_CAP(struct mlx4_dev *dev, struct mlx4_func_cap *func_cap) MLX4_GET(size, outbox, QUERY_FUNC_CAP_MCG_QUOTA_OFFSET); func_cap->mcg_quota = size & 0xFFFFFF; + MLX4_GET(size, outbox, QUERY_FUNC_CAP_BASE_TUNNEL_QPN_OFFSET); + func_cap->base_tunnel_qpn = size & 0xFFFFFF; + + MLX4_GET(size, outbox, QUERY_FUNC_CAP_BASE_PROXY_QPN_OFFSET); + func_cap->base_proxy_qpn = size & 0xFFFFFF; + for (i = 1; i <= func_cap->num_ports; ++i) { err = mlx4_cmd_box(dev, 0, mailbox->dma, i, 1, MLX4_CMD_QUERY_FUNC_CAP, diff --git a/drivers/net/ethernet/mellanox/mlx4/fw.h b/drivers/net/ethernet/mellanox/mlx4/fw.h index 83fcbbf1b169..ced1de57c818 100644 --- a/drivers/net/ethernet/mellanox/mlx4/fw.h +++ b/drivers/net/ethernet/mellanox/mlx4/fw.h @@ -134,6 +134,9 @@ struct mlx4_func_cap { int max_eq; int reserved_eq; int mcg_quota; + u32 base_qpn; + u32 base_tunnel_qpn; + u32 base_proxy_qpn; u8 physical_port[MLX4_MAX_PORTS + 1]; u8 port_flags[MLX4_MAX_PORTS + 1]; }; diff --git a/drivers/net/ethernet/mellanox/mlx4/main.c b/drivers/net/ethernet/mellanox/mlx4/main.c index 2f816c6aed72..06ef3afbc49a 100644 --- a/drivers/net/ethernet/mellanox/mlx4/main.c +++ b/drivers/net/ethernet/mellanox/mlx4/main.c @@ -384,6 +384,7 @@ static int mlx4_dev_cap(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap) dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FC_ADDR] + dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FC_EXCH]; + dev->caps.sqp_demux = (mlx4_is_master(dev)) ? MLX4_MAX_NUM_SLAVES : 0; return 0; } /*The function checks if there are live vf, return the num of them*/ @@ -541,6 +542,10 @@ static int mlx4_slave_cap(struct mlx4_dev *dev) return -ENODEV; } + /* Calculate our sqp_start */ + dev->caps.sqp_start = func_cap.base_proxy_qpn; + dev->caps.base_tunnel_sqpn = func_cap.base_tunnel_qpn; + return 0; } diff --git a/drivers/net/ethernet/mellanox/mlx4/qp.c b/drivers/net/ethernet/mellanox/mlx4/qp.c index fb2b36759cbf..b8da72b29cf7 100644 --- a/drivers/net/ethernet/mellanox/mlx4/qp.c +++ b/drivers/net/ethernet/mellanox/mlx4/qp.c @@ -406,7 +406,7 @@ int mlx4_init_qp_table(struct mlx4_dev *dev) * We also reserve the MSB of the 24-bit QP number to indicate * that a QP is an XRC QP. */ - dev->caps.sqp_start = + dev->caps.base_sqpn = ALIGN(dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FW], 8); { @@ -437,13 +437,36 @@ int mlx4_init_qp_table(struct mlx4_dev *dev) } + /* Reserve 8 real SQPs in both native and SRIOV modes. + * In addition, in SRIOV mode, reserve 8 proxy SQPs per function + * (for all PFs and VFs), and 8 corresponding tunnel QPs. + * Each proxy SQP works opposite its own tunnel QP. + * + * The QPs are arranged as follows: + * a. 8 real SQPs + * b. All the proxy SQPs (8 per function) + * c. All the tunnel QPs (8 per function) + */ + err = mlx4_bitmap_init(&qp_table->bitmap, dev->caps.num_qps, - (1 << 23) - 1, dev->caps.sqp_start + 8, + (1 << 23) - 1, dev->caps.base_sqpn + 8 + + 16 * MLX4_MFUNC_MAX * !!mlx4_is_master(dev), reserved_from_top); + + /* In mfunc, sqp_start is the base of the proxy SQPs, since the PF also + * uses paravirtualized SQPs. + * In native mode, sqp_start is the base of the real SQPs. */ + if (mlx4_is_mfunc(dev)) { + dev->caps.sqp_start = dev->caps.base_sqpn + + 8 * (mlx4_master_func_num(dev) + 1); + dev->caps.base_tunnel_sqpn = dev->caps.sqp_start + 8 * MLX4_MFUNC_MAX; + } else + dev->caps.sqp_start = dev->caps.base_sqpn; + if (err) return err; - return mlx4_CONF_SPECIAL_QP(dev, dev->caps.sqp_start); + return mlx4_CONF_SPECIAL_QP(dev, dev->caps.base_sqpn); } void mlx4_cleanup_qp_table(struct mlx4_dev *dev) diff --git a/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c b/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c index 293c9e820c49..3c57a83e6287 100644 --- a/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c +++ b/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c @@ -1105,7 +1105,8 @@ static void res_end_move(struct mlx4_dev *dev, int slave, static int valid_reserved(struct mlx4_dev *dev, int slave, int qpn) { - return mlx4_is_qp_reserved(dev, qpn); + return mlx4_is_qp_reserved(dev, qpn) && + (mlx4_is_master(dev) || mlx4_is_guest_proxy(dev, slave, qpn)); } static int qp_alloc_res(struct mlx4_dev *dev, int slave, int op, int cmd, diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h index 07aa8232e631..d5c82b7216de 100644 --- a/include/linux/mlx4/device.h +++ b/include/linux/mlx4/device.h @@ -693,7 +693,18 @@ static inline int mlx4_is_master(struct mlx4_dev *dev) static inline int mlx4_is_qp_reserved(struct mlx4_dev *dev, u32 qpn) { - return (qpn < dev->caps.sqp_start + 8); + return (qpn < dev->caps.base_sqpn + 8 + + 16 * MLX4_MFUNC_MAX * !!mlx4_is_master(dev)); +} + +static inline int mlx4_is_guest_proxy(struct mlx4_dev *dev, int slave, u32 qpn) +{ + int base = dev->caps.sqp_start + slave * 8; + + if (qpn >= base && qpn < base + 8) + return 1; + + return 0; } static inline int mlx4_is_mfunc(struct mlx4_dev *dev) -- 2.34.1