git.openwrt.org Git - openwrt/staging/pepe2k.git/blob

   1 From a563dccef2871e37efcfcb2f3faee7c9f9381f6c Mon Sep 17 00:00:00 2001
   2 From: Calvin Johnson <calvin.johnson@nxp.com>
   3 Date: Wed, 20 Jun 2018 10:23:41 +0530
   4 Subject: [PATCH] staging: fsl_ppfe/eth: handle ls1012a errata_a010897
   5
   6 On LS1012A rev 1.0, Jumbo frames are not supported as it causes
   7 the PFE controller to hang. A reset of the entire chip is required
   8 to resume normal operation.
   9
  10 To handle this errata, frames with length > 1900 are truncated for
  11 rev 1.0 of LS1012A.
  12
  13 Signed-off-by: Calvin Johnson <calvin.johnson@nxp.com>
  14 ---
  15  drivers/staging/fsl_ppfe/pfe_eth.c | 20 +++++++++++++++++++-
  16  drivers/staging/fsl_ppfe/pfe_eth.h |  3 ++-
  17  drivers/staging/fsl_ppfe/pfe_hal.c | 10 +++++++++-
  18  3 files changed, 30 insertions(+), 3 deletions(-)
  19
  20 --- a/drivers/staging/fsl_ppfe/pfe_eth.c
  21 +++ b/drivers/staging/fsl_ppfe/pfe_eth.c
  22 @@ -44,6 +44,7 @@
  23  #include <linux/delay.h>
  24  #include <linux/regmap.h>
  25  #include <linux/i2c.h>
  26 +#include <linux/fsl/guts.h>
  27
  28  #if defined(CONFIG_NF_CONNTRACK_MARK)
  29  #include <net/netfilter/nf_conntrack.h>
  30 @@ -52,6 +53,10 @@
  31  #include "pfe_mod.h"
  32  #include "pfe_eth.h"
  33
  34 +#define LS1012A_REV_1_0                0x87040010
  35 +
  36 +bool pfe_errata_a010897;
  37 +
  38  static void *cbus_emac_base[3];
  39  static void *cbus_gpi_base[3];
  40
  41 @@ -2362,7 +2367,15 @@ static int pfe_eth_init_one(struct pfe *
  42
  43         /* Set MTU limits */
  44         ndev->min_mtu = ETH_MIN_MTU;
  45 -       ndev->max_mtu = JUMBO_FRAME_SIZE;
  46 +
  47 +/*
  48 + * Jumbo frames are not supported on LS1012A rev-1.0.
  49 + * So max mtu should be restricted to supported frame length.
  50 + */
  51 +       if (pfe_errata_a010897)
  52 +               ndev->max_mtu = JUMBO_FRAME_SIZE_V1 - ETH_HLEN - ETH_FCS_LEN;
  53 +       else
  54 +               ndev->max_mtu = JUMBO_FRAME_SIZE_V2 - ETH_HLEN - ETH_FCS_LEN;
  55
  56         /* supported features */
  57         ndev->hw_features = NETIF_F_SG;
  58 @@ -2453,6 +2466,11 @@ int pfe_eth_init(struct pfe *pfe)
  59         cbus_gpi_base[0] = EGPI1_BASE_ADDR;
  60         cbus_gpi_base[1] = EGPI2_BASE_ADDR;
  61
  62 +       if (fsl_guts_get_svr() == LS1012A_REV_1_0)
  63 +               pfe_errata_a010897 = true;
  64 +       else
  65 +               pfe_errata_a010897 = false;
  66 +
  67         for (ii = 0; ii < NUM_GEMAC_SUPPORT; ii++) {
  68                 err = pfe_eth_init_one(pfe, ii);
  69                 if (err)
  70 --- a/drivers/staging/fsl_ppfe/pfe_eth.h
  71 +++ b/drivers/staging/fsl_ppfe/pfe_eth.h
  72 @@ -85,7 +85,8 @@ struct ls1012a_pfe_platform_data {
  73  #define EMAC_TXQ_CNT   16
  74  #define EMAC_TXQ_DEPTH (HIF_TX_DESC_NT)
  75
  76 -#define JUMBO_FRAME_SIZE       10258
  77 +#define JUMBO_FRAME_SIZE_V1    1900
  78 +#define JUMBO_FRAME_SIZE_V2    10258
  79  /*
  80   * Client Tx queue threshold, for txQ flush condition.
  81   * It must be smaller than the queue size (in case we ever change it in the
  82 --- a/drivers/staging/fsl_ppfe/pfe_hal.c
  83 +++ b/drivers/staging/fsl_ppfe/pfe_hal.c
  84 @@ -19,6 +19,9 @@
  85  #include "pfe_mod.h"
  86  #include "pfe/pfe.h"
  87
  88 +/* A-010897: Jumbo frame is not supported */
  89 +extern bool pfe_errata_a010897;
  90 +
  91  #define PFE_RCR_MAX_FL_MASK    0xC000FFFF
  92
  93  void *cbus_base_addr;
  94 @@ -1102,7 +1105,12 @@ void gemac_set_config(void *base, struct
  95         /*GEMAC config taken from VLSI */
  96         writel(0x00000004, base + EMAC_TFWR_STR_FWD);
  97         writel(0x00000005, base + EMAC_RX_SECTION_FULL);
  98 -       writel(0x00003fff, base + EMAC_TRUNC_FL);
  99 +
 100 +       if (pfe_errata_a010897)
 101 +               writel(0x0000076c, base + EMAC_TRUNC_FL);
 102 +       else
 103 +               writel(0x00003fff, base + EMAC_TRUNC_FL);
 104 +
 105         writel(0x00000030, base + EMAC_TX_SECTION_EMPTY);
 106         writel(0x00000000, base + EMAC_MIB_CTRL_STS_REG);
 107