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author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-12-11 22:27:06 (GMT) |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-12-11 22:27:06 (GMT) |
commit | 70e71ca0af244f48a5dcf56dc435243792e3a495 (patch) | |
tree | f7d9c4c4d9a857a00043e9bf6aa2d6f533a34778 /drivers/net/ethernet/mellanox/mlx4/port.c | |
parent | bae41e45b7400496b9bf0c70c6004419d9987819 (diff) | |
parent | 00c83b01d58068dfeb2e1351cca6fccf2a83fa8f (diff) | |
download | linux-70e71ca0af244f48a5dcf56dc435243792e3a495.tar.xz |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
Pull networking updates from David Miller:
1) New offloading infrastructure and example 'rocker' driver for
offloading of switching and routing to hardware.
This work was done by a large group of dedicated individuals, not
limited to: Scott Feldman, Jiri Pirko, Thomas Graf, John Fastabend,
Jamal Hadi Salim, Andy Gospodarek, Florian Fainelli, Roopa Prabhu
2) Start making the networking operate on IOV iterators instead of
modifying iov objects in-situ during transfers. Thanks to Al Viro
and Herbert Xu.
3) A set of new netlink interfaces for the TIPC stack, from Richard
Alpe.
4) Remove unnecessary looping during ipv6 routing lookups, from Martin
KaFai Lau.
5) Add PAUSE frame generation support to gianfar driver, from Matei
Pavaluca.
6) Allow for larger reordering levels in TCP, which are easily
achievable in the real world right now, from Eric Dumazet.
7) Add a variable of napi_schedule that doesn't need to disable cpu
interrupts, from Eric Dumazet.
8) Use a doubly linked list to optimize neigh_parms_release(), from
Nicolas Dichtel.
9) Various enhancements to the kernel BPF verifier, and allow eBPF
programs to actually be attached to sockets. From Alexei
Starovoitov.
10) Support TSO/LSO in sunvnet driver, from David L Stevens.
11) Allow controlling ECN usage via routing metrics, from Florian
Westphal.
12) Remote checksum offload, from Tom Herbert.
13) Add split-header receive, BQL, and xmit_more support to amd-xgbe
driver, from Thomas Lendacky.
14) Add MPLS support to openvswitch, from Simon Horman.
15) Support wildcard tunnel endpoints in ipv6 tunnels, from Steffen
Klassert.
16) Do gro flushes on a per-device basis using a timer, from Eric
Dumazet. This tries to resolve the conflicting goals between the
desired handling of bulk vs. RPC-like traffic.
17) Allow userspace to ask for the CPU upon what a packet was
received/steered, via SO_INCOMING_CPU. From Eric Dumazet.
18) Limit GSO packets to half the current congestion window, from Eric
Dumazet.
19) Add a generic helper so that all drivers set their RSS keys in a
consistent way, from Eric Dumazet.
20) Add xmit_more support to enic driver, from Govindarajulu
Varadarajan.
21) Add VLAN packet scheduler action, from Jiri Pirko.
22) Support configurable RSS hash functions via ethtool, from Eyal
Perry.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1820 commits)
Fix race condition between vxlan_sock_add and vxlan_sock_release
net/macb: fix compilation warning for print_hex_dump() called with skb->mac_header
net/mlx4: Add support for A0 steering
net/mlx4: Refactor QUERY_PORT
net/mlx4_core: Add explicit error message when rule doesn't meet configuration
net/mlx4: Add A0 hybrid steering
net/mlx4: Add mlx4_bitmap zone allocator
net/mlx4: Add a check if there are too many reserved QPs
net/mlx4: Change QP allocation scheme
net/mlx4_core: Use tasklet for user-space CQ completion events
net/mlx4_core: Mask out host side virtualization features for guests
net/mlx4_en: Set csum level for encapsulated packets
be2net: Export tunnel offloads only when a VxLAN tunnel is created
gianfar: Fix dma check map error when DMA_API_DEBUG is enabled
cxgb4/csiostor: Don't use MASTER_MUST for fw_hello call
net: fec: only enable mdio interrupt before phy device link up
net: fec: clear all interrupt events to support i.MX6SX
net: fec: reset fep link status in suspend function
net: sock: fix access via invalid file descriptor
net: introduce helper macro for_each_cmsghdr
...
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx4/port.c')
-rw-r--r-- | drivers/net/ethernet/mellanox/mlx4/port.c | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx4/port.c b/drivers/net/ethernet/mellanox/mlx4/port.c index 94eeb2c..30eb1ea 100644 --- a/drivers/net/ethernet/mellanox/mlx4/port.c +++ b/drivers/net/ethernet/mellanox/mlx4/port.c @@ -1311,3 +1311,159 @@ int mlx4_get_roce_gid_from_slave(struct mlx4_dev *dev, int port, int slave_id, return 0; } EXPORT_SYMBOL(mlx4_get_roce_gid_from_slave); + +/* Cable Module Info */ +#define MODULE_INFO_MAX_READ 48 + +#define I2C_ADDR_LOW 0x50 +#define I2C_ADDR_HIGH 0x51 +#define I2C_PAGE_SIZE 256 + +/* Module Info Data */ +struct mlx4_cable_info { + u8 i2c_addr; + u8 page_num; + __be16 dev_mem_address; + __be16 reserved1; + __be16 size; + __be32 reserved2[2]; + u8 data[MODULE_INFO_MAX_READ]; +}; + +enum cable_info_err { + CABLE_INF_INV_PORT = 0x1, + CABLE_INF_OP_NOSUP = 0x2, + CABLE_INF_NOT_CONN = 0x3, + CABLE_INF_NO_EEPRM = 0x4, + CABLE_INF_PAGE_ERR = 0x5, + CABLE_INF_INV_ADDR = 0x6, + CABLE_INF_I2C_ADDR = 0x7, + CABLE_INF_QSFP_VIO = 0x8, + CABLE_INF_I2C_BUSY = 0x9, +}; + +#define MAD_STATUS_2_CABLE_ERR(mad_status) ((mad_status >> 8) & 0xFF) + +static inline const char *cable_info_mad_err_str(u16 mad_status) +{ + u8 err = MAD_STATUS_2_CABLE_ERR(mad_status); + + switch (err) { + case CABLE_INF_INV_PORT: + return "invalid port selected"; + case CABLE_INF_OP_NOSUP: + return "operation not supported for this port (the port is of type CX4 or internal)"; + case CABLE_INF_NOT_CONN: + return "cable is not connected"; + case CABLE_INF_NO_EEPRM: + return "the connected cable has no EPROM (passive copper cable)"; + case CABLE_INF_PAGE_ERR: + return "page number is greater than 15"; + case CABLE_INF_INV_ADDR: + return "invalid device_address or size (that is, size equals 0 or address+size is greater than 256)"; + case CABLE_INF_I2C_ADDR: + return "invalid I2C slave address"; + case CABLE_INF_QSFP_VIO: + return "at least one cable violates the QSFP specification and ignores the modsel signal"; + case CABLE_INF_I2C_BUSY: + return "I2C bus is constantly busy"; + } + return "Unknown Error"; +} + +/** + * mlx4_get_module_info - Read cable module eeprom data + * @dev: mlx4_dev. + * @port: port number. + * @offset: byte offset in eeprom to start reading data from. + * @size: num of bytes to read. + * @data: output buffer to put the requested data into. + * + * Reads cable module eeprom data, puts the outcome data into + * data pointer paramer. + * Returns num of read bytes on success or a negative error + * code. + */ +int mlx4_get_module_info(struct mlx4_dev *dev, u8 port, + u16 offset, u16 size, u8 *data) +{ + struct mlx4_cmd_mailbox *inbox, *outbox; + struct mlx4_mad_ifc *inmad, *outmad; + struct mlx4_cable_info *cable_info; + u16 i2c_addr; + int ret; + + if (size > MODULE_INFO_MAX_READ) + size = MODULE_INFO_MAX_READ; + + inbox = mlx4_alloc_cmd_mailbox(dev); + if (IS_ERR(inbox)) + return PTR_ERR(inbox); + + outbox = mlx4_alloc_cmd_mailbox(dev); + if (IS_ERR(outbox)) { + mlx4_free_cmd_mailbox(dev, inbox); + return PTR_ERR(outbox); + } + + inmad = (struct mlx4_mad_ifc *)(inbox->buf); + outmad = (struct mlx4_mad_ifc *)(outbox->buf); + + inmad->method = 0x1; /* Get */ + inmad->class_version = 0x1; + inmad->mgmt_class = 0x1; + inmad->base_version = 0x1; + inmad->attr_id = cpu_to_be16(0xFF60); /* Module Info */ + + if (offset < I2C_PAGE_SIZE && offset + size > I2C_PAGE_SIZE) + /* Cross pages reads are not allowed + * read until offset 256 in low page + */ + size -= offset + size - I2C_PAGE_SIZE; + + i2c_addr = I2C_ADDR_LOW; + if (offset >= I2C_PAGE_SIZE) { + /* Reset offset to high page */ + i2c_addr = I2C_ADDR_HIGH; + offset -= I2C_PAGE_SIZE; + } + + cable_info = (struct mlx4_cable_info *)inmad->data; + cable_info->dev_mem_address = cpu_to_be16(offset); + cable_info->page_num = 0; + cable_info->i2c_addr = i2c_addr; + cable_info->size = cpu_to_be16(size); + + ret = mlx4_cmd_box(dev, inbox->dma, outbox->dma, port, 3, + MLX4_CMD_MAD_IFC, MLX4_CMD_TIME_CLASS_C, + MLX4_CMD_NATIVE); + if (ret) + goto out; + + if (be16_to_cpu(outmad->status)) { + /* Mad returned with bad status */ + ret = be16_to_cpu(outmad->status); + mlx4_warn(dev, + "MLX4_CMD_MAD_IFC Get Module info attr(%x) port(%d) i2c_addr(%x) offset(%d) size(%d): Response Mad Status(%x) - %s\n", + 0xFF60, port, i2c_addr, offset, size, + ret, cable_info_mad_err_str(ret)); + + if (i2c_addr == I2C_ADDR_HIGH && + MAD_STATUS_2_CABLE_ERR(ret) == CABLE_INF_I2C_ADDR) + /* Some SFP cables do not support i2c slave + * address 0x51 (high page), abort silently. + */ + ret = 0; + else + ret = -ret; + goto out; + } + cable_info = (struct mlx4_cable_info *)outmad->data; + memcpy(data, cable_info->data, size); + ret = size; +out: + mlx4_free_cmd_mailbox(dev, inbox); + mlx4_free_cmd_mailbox(dev, outbox); + return ret; +} +EXPORT_SYMBOL(mlx4_get_module_info); |