LCOV - code coverage report
Current view: top level - spdk/lib/vmd - led.c (source / functions) Hit Total Coverage
Test: Combined Lines: 0 44 0.0 %
Date: 2024-07-15 00:06:18 Functions: 0 5 0.0 %
Legend: Lines: hit not hit | Branches: + taken - not taken # not executed Branches: 0 24 0.0 %

           Branch data     Line data    Source code
       1                 :            : /*   SPDX-License-Identifier: BSD-3-Clause
       2                 :            :  *   Copyright (C) 2019 Intel Corporation.
       3                 :            :  *   All rights reserved.
       4                 :            :  */
       5                 :            : 
       6                 :            : #include "spdk/stdinc.h"
       7                 :            : #include "spdk/likely.h"
       8                 :            : #include "spdk/log.h"
       9                 :            : #include "vmd_internal.h"
      10                 :            : 
      11                 :            : struct vmd_led_indicator_config {
      12                 :            :         uint8_t attention_indicator     : 2;
      13                 :            :         uint8_t power_indicator         : 2;
      14                 :            :         uint8_t reserved                : 4;
      15                 :            : };
      16                 :            : 
      17                 :            : /*
      18                 :            :  * VMD LED     Attn       Power       LED Amber
      19                 :            :  * State       Indicator  Indicator
      20                 :            :  *             Control    Control
      21                 :            :  * ------------------------------------------------
      22                 :            :  * Off         11b        11b         Off
      23                 :            :  * Ident       11b        01b         Blink 4Hz
      24                 :            :  * Fault       01b        11b         On
      25                 :            :  * Rebuild     01b        01b         Blink 1Hz
      26                 :            :  */
      27                 :            : static const struct vmd_led_indicator_config g_led_config[] = {
      28                 :            :         [SPDK_VMD_LED_STATE_OFF]        = { .attention_indicator = 3, .power_indicator = 3 },
      29                 :            :         [SPDK_VMD_LED_STATE_IDENTIFY]   = { .attention_indicator = 3, .power_indicator = 1 },
      30                 :            :         [SPDK_VMD_LED_STATE_FAULT]      = { .attention_indicator = 1, .power_indicator = 3 },
      31                 :            :         [SPDK_VMD_LED_STATE_REBUILD]    = { .attention_indicator = 1, .power_indicator = 1 },
      32                 :            : };
      33                 :            : 
      34                 :            : static void
      35                 :          0 : vmd_led_set_indicator_control(struct vmd_pci_device *vmd_device, enum spdk_vmd_led_state state)
      36                 :            : {
      37                 :            :         const struct vmd_led_indicator_config *config;
      38                 :            :         union express_slot_control_register slot_control;
      39                 :            : 
      40         [ #  # ]:          0 :         assert(state >= SPDK_VMD_LED_STATE_OFF && state <= SPDK_VMD_LED_STATE_REBUILD);
      41                 :          0 :         config = &g_led_config[state];
      42                 :            : 
      43                 :          0 :         slot_control = vmd_device->pcie_cap->slot_control;
      44                 :          0 :         slot_control.bit_field.attention_indicator_control = config->attention_indicator;
      45                 :          0 :         slot_control.bit_field.power_indicator_control = config->power_indicator;
      46                 :            : 
      47                 :            :         /*
      48                 :            :          * Due to the fact that writes to the PCI config space are posted writes, we need to issue
      49                 :            :          * a read to the register we've just written to ensure it reached its destination.
      50                 :            :          * TODO: wrap all register writes with a function taking care of that.
      51                 :            :          */
      52                 :          0 :         vmd_device->pcie_cap->slot_control = slot_control;
      53                 :          0 :         vmd_device->cached_slot_control = vmd_device->pcie_cap->slot_control;
      54                 :          0 : }
      55                 :            : 
      56                 :            : static unsigned int
      57                 :          0 : vmd_led_get_state(struct vmd_pci_device *vmd_device)
      58                 :            : {
      59                 :            :         const struct vmd_led_indicator_config *config;
      60                 :            :         union express_slot_control_register slot_control;
      61                 :            :         unsigned int state;
      62                 :            : 
      63                 :          0 :         slot_control = vmd_device->cached_slot_control;
      64         [ #  # ]:          0 :         for (state = SPDK_VMD_LED_STATE_OFF; state <= SPDK_VMD_LED_STATE_REBUILD; ++state) {
      65                 :          0 :                 config = &g_led_config[state];
      66                 :            : 
      67         [ #  # ]:          0 :                 if (slot_control.bit_field.attention_indicator_control == config->attention_indicator &&
      68         [ #  # ]:          0 :                     slot_control.bit_field.power_indicator_control == config->power_indicator) {
      69                 :          0 :                         return state;
      70                 :            :                 }
      71                 :            :         }
      72                 :            : 
      73                 :          0 :         return SPDK_VMD_LED_STATE_UNKNOWN;
      74                 :            : }
      75                 :            : 
      76                 :            : /*
      77                 :            :  * The identifying device under VMD is located in the global list of VMD controllers.  If the BDF
      78                 :            :  * identifies an endpoint, then the LED is attached to the endpoint's parent.  If the BDF identifies
      79                 :            :  * a type 1 header, then this device has the corresponding LED. This may arise when a user wants to
      80                 :            :  * identify a given empty slot under VMD.
      81                 :            :  */
      82                 :            : static struct vmd_pci_device *
      83                 :          0 : vmd_get_led_device(const struct spdk_pci_device *pci_device)
      84                 :            : {
      85                 :            :         struct vmd_pci_device *vmd_device;
      86                 :            : 
      87   [ #  #  #  # ]:          0 :         assert(strcmp(spdk_pci_device_get_type(pci_device), "vmd") == 0);
      88                 :            : 
      89                 :          0 :         vmd_device = vmd_find_device(&pci_device->addr);
      90         [ #  # ]:          0 :         if (spdk_unlikely(vmd_device == NULL)) {
      91                 :          0 :                 return NULL;
      92                 :            :         }
      93                 :            : 
      94         [ #  # ]:          0 :         if (vmd_device->header_type == PCI_HEADER_TYPE_NORMAL) {
      95         [ #  # ]:          0 :                 if (spdk_unlikely(vmd_device->parent == NULL)) {
      96                 :          0 :                         return NULL;
      97                 :            :                 }
      98                 :            : 
      99                 :          0 :                 return vmd_device->parent->self;
     100                 :            :         }
     101                 :            : 
     102                 :          0 :         return vmd_device;
     103                 :            : }
     104                 :            : 
     105                 :            : int
     106                 :          0 : spdk_vmd_set_led_state(struct spdk_pci_device *pci_device, enum spdk_vmd_led_state state)
     107                 :            : {
     108                 :            :         struct vmd_pci_device *vmd_device;
     109                 :            : 
     110         [ #  # ]:          0 :         if (state < SPDK_VMD_LED_STATE_OFF || state > SPDK_VMD_LED_STATE_REBUILD) {
     111                 :          0 :                 SPDK_ERRLOG("Invalid LED state\n");
     112                 :          0 :                 return -EINVAL;
     113                 :            :         }
     114                 :            : 
     115                 :          0 :         vmd_device = vmd_get_led_device(pci_device);
     116         [ #  # ]:          0 :         if (spdk_unlikely(vmd_device == NULL)) {
     117                 :          0 :                 SPDK_ERRLOG("The PCI device is not behind the VMD\n");
     118                 :          0 :                 return -ENODEV;
     119                 :            :         }
     120                 :            : 
     121                 :          0 :         vmd_led_set_indicator_control(vmd_device, state);
     122                 :          0 :         return 0;
     123                 :            : }
     124                 :            : 
     125                 :            : int
     126                 :          0 : spdk_vmd_get_led_state(struct spdk_pci_device *pci_device, enum spdk_vmd_led_state *state)
     127                 :            : {
     128                 :            :         struct vmd_pci_device *vmd_device;
     129                 :            : 
     130                 :          0 :         vmd_device = vmd_get_led_device(pci_device);
     131         [ #  # ]:          0 :         if (spdk_unlikely(vmd_device == NULL)) {
     132                 :          0 :                 SPDK_ERRLOG("The PCI device is not behind the VMD\n");
     133                 :          0 :                 return -ENODEV;
     134                 :            :         }
     135                 :            : 
     136                 :          0 :         *state = (enum spdk_vmd_led_state)vmd_led_get_state(vmd_device);
     137                 :          0 :         return 0;
     138                 :            : }

Generated by: LCOV version 1.14