From ddd8a6c12d7e494902a9435a9a7a543ef730b2d8 Mon Sep 17 00:00:00 2001 From: Eugenia Emantayev Date: Tue, 23 Apr 2013 06:06:48 +0000 Subject: [PATCH] net/mlx4_core: Read HCA frequency and map internal clock Read HCA frequency, read PCI clock bar and offset, map internal clock to PCI bar. Signed-off-by: Eugenia Emantayev Signed-off-by: Amir Vadai Signed-off-by: David S. Miller --- drivers/net/ethernet/mellanox/mlx4/fw.c | 11 ++++++ drivers/net/ethernet/mellanox/mlx4/fw.h | 1 + drivers/net/ethernet/mellanox/mlx4/main.c | 57 +++++++++++++++++++++++++++++++ drivers/net/ethernet/mellanox/mlx4/mlx4.h | 6 +++- include/linux/mlx4/device.h | 1 + 5 files changed, 75 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/mellanox/mlx4/fw.c b/drivers/net/ethernet/mellanox/mlx4/fw.c index f1e7097..6776c25 100644 --- a/drivers/net/ethernet/mellanox/mlx4/fw.c +++ b/drivers/net/ethernet/mellanox/mlx4/fw.c @@ -1013,6 +1013,9 @@ int mlx4_QUERY_FW(struct mlx4_dev *dev) #define QUERY_FW_COMM_BASE_OFFSET 0x40 #define QUERY_FW_COMM_BAR_OFFSET 0x48 +#define QUERY_FW_CLOCK_OFFSET 0x50 +#define QUERY_FW_CLOCK_BAR 0x58 + mailbox = mlx4_alloc_cmd_mailbox(dev); if (IS_ERR(mailbox)) return PTR_ERR(mailbox); @@ -1087,6 +1090,12 @@ int mlx4_QUERY_FW(struct mlx4_dev *dev) fw->comm_bar, fw->comm_base); mlx4_dbg(dev, "FW size %d KB\n", fw->fw_pages >> 2); + MLX4_GET(fw->clock_offset, outbox, QUERY_FW_CLOCK_OFFSET); + MLX4_GET(fw->clock_bar, outbox, QUERY_FW_CLOCK_BAR); + fw->clock_bar = (fw->clock_bar >> 6) * 2; + mlx4_dbg(dev, "Internal clock bar:%d offset:0x%llx\n", + fw->clock_bar, fw->clock_offset); + /* * Round up number of system pages needed in case * MLX4_ICM_PAGE_SIZE < PAGE_SIZE. @@ -1374,6 +1383,7 @@ int mlx4_QUERY_HCA(struct mlx4_dev *dev, u8 byte_field; #define QUERY_HCA_GLOBAL_CAPS_OFFSET 0x04 +#define QUERY_HCA_CORE_CLOCK_OFFSET 0x0c mailbox = mlx4_alloc_cmd_mailbox(dev); if (IS_ERR(mailbox)) @@ -1388,6 +1398,7 @@ int mlx4_QUERY_HCA(struct mlx4_dev *dev, goto out; MLX4_GET(param->global_caps, outbox, QUERY_HCA_GLOBAL_CAPS_OFFSET); + MLX4_GET(param->hca_core_clock, outbox, QUERY_HCA_CORE_CLOCK_OFFSET); /* QPC/EEC/CQC/EQC/RDMARC attributes */ diff --git a/drivers/net/ethernet/mellanox/mlx4/fw.h b/drivers/net/ethernet/mellanox/mlx4/fw.h index 151c2bb..fdf4166 100644 --- a/drivers/net/ethernet/mellanox/mlx4/fw.h +++ b/drivers/net/ethernet/mellanox/mlx4/fw.h @@ -162,6 +162,7 @@ struct mlx4_init_hca_param { u64 global_caps; u16 log_mc_entry_sz; u16 log_mc_hash_sz; + u16 hca_core_clock; /* Internal Clock Frequency (in MHz) */ u8 log_num_qps; u8 log_num_srqs; u8 log_num_cqs; diff --git a/drivers/net/ethernet/mellanox/mlx4/main.c b/drivers/net/ethernet/mellanox/mlx4/main.c index 16abde2..e81840f 100644 --- a/drivers/net/ethernet/mellanox/mlx4/main.c +++ b/drivers/net/ethernet/mellanox/mlx4/main.c @@ -513,6 +513,8 @@ static int mlx4_slave_cap(struct mlx4_dev *dev) mlx4_log_num_mgm_entry_size = hca_param.log_mc_entry_sz; + dev->caps.hca_core_clock = hca_param.hca_core_clock; + memset(&dev_cap, 0, sizeof(dev_cap)); dev->caps.max_qp_dest_rdma = 1 << hca_param.log_rd_per_qp; err = mlx4_dev_cap(dev, &dev_cap); @@ -1226,8 +1228,31 @@ static void unmap_bf_area(struct mlx4_dev *dev) io_mapping_free(mlx4_priv(dev)->bf_mapping); } +static int map_internal_clock(struct mlx4_dev *dev) +{ + struct mlx4_priv *priv = mlx4_priv(dev); + + priv->clock_mapping = + ioremap(pci_resource_start(dev->pdev, priv->fw.clock_bar) + + priv->fw.clock_offset, MLX4_CLOCK_SIZE); + + if (!priv->clock_mapping) + return -ENOMEM; + + return 0; +} + +static void unmap_internal_clock(struct mlx4_dev *dev) +{ + struct mlx4_priv *priv = mlx4_priv(dev); + + if (priv->clock_mapping) + iounmap(priv->clock_mapping); +} + static void mlx4_close_hca(struct mlx4_dev *dev) { + unmap_internal_clock(dev); unmap_bf_area(dev); if (mlx4_is_slave(dev)) mlx4_slave_exit(dev); @@ -1445,6 +1470,37 @@ static int mlx4_init_hca(struct mlx4_dev *dev) mlx4_err(dev, "INIT_HCA command failed, aborting.\n"); goto err_free_icm; } + /* + * If TS is supported by FW + * read HCA frequency by QUERY_HCA command + */ + if (dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_TS) { + memset(&init_hca, 0, sizeof(init_hca)); + err = mlx4_QUERY_HCA(dev, &init_hca); + if (err) { + mlx4_err(dev, "QUERY_HCA command failed, disable timestamp.\n"); + dev->caps.flags2 &= ~MLX4_DEV_CAP_FLAG2_TS; + } else { + dev->caps.hca_core_clock = + init_hca.hca_core_clock; + } + + /* In case we got HCA frequency 0 - disable timestamping + * to avoid dividing by zero + */ + if (!dev->caps.hca_core_clock) { + dev->caps.flags2 &= ~MLX4_DEV_CAP_FLAG2_TS; + mlx4_err(dev, + "HCA frequency is 0. Timestamping is not supported."); + } else if (map_internal_clock(dev)) { + /* + * Map internal clock, + * in case of failure disable timestamping + */ + dev->caps.flags2 &= ~MLX4_DEV_CAP_FLAG2_TS; + mlx4_err(dev, "Failed to map internal clock. Timestamping is not supported.\n"); + } + } } else { err = mlx4_init_slave(dev); if (err) { @@ -1478,6 +1534,7 @@ static int mlx4_init_hca(struct mlx4_dev *dev) return 0; unmap_bf: + unmap_internal_clock(dev); unmap_bf_area(dev); err_close: diff --git a/drivers/net/ethernet/mellanox/mlx4/mlx4.h b/drivers/net/ethernet/mellanox/mlx4/mlx4.h index 252f4ba..0567f01 100644 --- a/drivers/net/ethernet/mellanox/mlx4/mlx4.h +++ b/drivers/net/ethernet/mellanox/mlx4/mlx4.h @@ -87,7 +87,8 @@ enum { MLX4_HCR_SIZE = 0x0001c, MLX4_CLR_INT_SIZE = 0x00008, MLX4_SLAVE_COMM_BASE = 0x0, - MLX4_COMM_PAGESIZE = 0x1000 + MLX4_COMM_PAGESIZE = 0x1000, + MLX4_CLOCK_SIZE = 0x00008 }; enum { @@ -403,6 +404,7 @@ struct mlx4_fw { u64 clr_int_base; u64 catas_offset; u64 comm_base; + u64 clock_offset; struct mlx4_icm *fw_icm; struct mlx4_icm *aux_icm; u32 catas_size; @@ -410,6 +412,7 @@ struct mlx4_fw { u8 clr_int_bar; u8 catas_bar; u8 comm_bar; + u8 clock_bar; }; struct mlx4_comm { @@ -826,6 +829,7 @@ struct mlx4_priv { struct list_head bf_list; struct mutex bf_mutex; struct io_mapping *bf_mapping; + void __iomem *clock_mapping; int reserved_mtts; int fs_hash_mode; u8 virt2phys_pkey[MLX4_MFUNC_MAX][MLX4_MAX_PORTS][MLX4_MAX_PORT_PKEYS]; diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h index 86ae260..e088290 100644 --- a/include/linux/mlx4/device.h +++ b/include/linux/mlx4/device.h @@ -445,6 +445,7 @@ struct mlx4_caps { u8 eqe_factor; u32 userspace_caps; /* userspace must be aware of these */ u32 function_caps; /* VFs must be aware of these */ + u16 hca_core_clock; }; struct mlx4_buf_list { -- 2.7.4