1 .. SPDX-License-Identifier: GPL-2.0 1 .. SPDX-License-Identifier: GPL-2.0
2 2
3 ==================== 3 ====================
4 mlx4 devlink support 4 mlx4 devlink support
5 ==================== 5 ====================
6 6
7 This document describes the devlink features i 7 This document describes the devlink features implemented by the ``mlx4``
8 device driver. 8 device driver.
9 9
10 Parameters 10 Parameters
11 ========== 11 ==========
12 12
13 .. list-table:: Generic parameters implemented 13 .. list-table:: Generic parameters implemented
14 14
15 * - Name 15 * - Name
16 - Mode 16 - Mode
17 * - ``internal_err_reset`` 17 * - ``internal_err_reset``
18 - driverinit, runtime 18 - driverinit, runtime
19 * - ``max_macs`` 19 * - ``max_macs``
20 - driverinit 20 - driverinit
21 * - ``region_snapshot_enable`` 21 * - ``region_snapshot_enable``
22 - driverinit, runtime 22 - driverinit, runtime
23 23
24 The ``mlx4`` driver also implements the follow 24 The ``mlx4`` driver also implements the following driver-specific
25 parameters. 25 parameters.
26 26
27 .. list-table:: Driver-specific parameters imp 27 .. list-table:: Driver-specific parameters implemented
28 :widths: 5 5 5 85 28 :widths: 5 5 5 85
29 29
30 * - Name 30 * - Name
31 - Type 31 - Type
32 - Mode 32 - Mode
33 - Description 33 - Description
34 * - ``enable_64b_cqe_eqe`` 34 * - ``enable_64b_cqe_eqe``
35 - Boolean 35 - Boolean
36 - driverinit 36 - driverinit
37 - Enable 64 byte CQEs/EQEs, if the FW sup 37 - Enable 64 byte CQEs/EQEs, if the FW supports it.
38 * - ``enable_4k_uar`` 38 * - ``enable_4k_uar``
39 - Boolean 39 - Boolean
40 - driverinit 40 - driverinit
41 - Enable using the 4k UAR. 41 - Enable using the 4k UAR.
42 42
43 The ``mlx4`` driver supports reloading via ``D 43 The ``mlx4`` driver supports reloading via ``DEVLINK_CMD_RELOAD``
44 44
45 Regions 45 Regions
46 ======= 46 =======
47 47
48 The ``mlx4`` driver supports dumping the firmw 48 The ``mlx4`` driver supports dumping the firmware PCI crspace and health
49 buffer during a critical firmware issue. 49 buffer during a critical firmware issue.
50 50
51 In case a firmware command times out, firmware 51 In case a firmware command times out, firmware getting stuck, or a non zero
52 value on the catastrophic buffer, a snapshot w 52 value on the catastrophic buffer, a snapshot will be taken by the driver.
53 53
54 The ``cr-space`` region will contain the firmw 54 The ``cr-space`` region will contain the firmware PCI crspace contents. The
55 ``fw-health`` region will contain the device f 55 ``fw-health`` region will contain the device firmware's health buffer.
56 Snapshots for both of these regions are taken 56 Snapshots for both of these regions are taken on the same event triggers.
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