From 603ff0081af96a1694f0d86e1dccbc118871f27f Mon Sep 17 00:00:00 2001 From: "Edgar E. Iglesias" Date: Fri, 25 Sep 2015 23:50:07 -0700 Subject: [PATCH] net: zynq: Disable secondary queues Zynq has no priority queues. ZynqMP has one priority queue and this change is required to get ethernet working. This patch was not needed on ep108 for uknown reason even it should be used. Tested on Zynq and ZynqMP. Signed-off-by: Edgar E. Iglesias Signed-off-by: Michal Simek --- drivers/net/zynq_gem.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/drivers/net/zynq_gem.c b/drivers/net/zynq_gem.c index 1b5b6fd942..027b49bf7b 100644 --- a/drivers/net/zynq_gem.c +++ b/drivers/net/zynq_gem.c @@ -132,6 +132,10 @@ struct zynq_gem_regs { u32 reserved6[18]; #define STAT_SIZE 44 u32 stat[STAT_SIZE]; /* 0x100 - Octects transmitted Low reg */ + u32 reserved7[164]; + u32 transmit_q1_ptr; /* 0x440 - Transmit priority queue 1 */ + u32 reserved8[15]; + u32 receive_q1_ptr; /* 0x480 - Receive priority queue 1 */ }; /* BD descriptors */ @@ -148,6 +152,9 @@ struct emac_bd { /* BD separation space */ #define BD_SEPRN_SPACE (RX_BUF * sizeof(struct emac_bd)) +/* Setup the first free TX descriptor */ +#define TX_FREE_DESC 2 + /* Initialized, rxbd_current, rx_first_buf must be 0 after init */ struct zynq_gem_priv { struct emac_bd *tx_bd; @@ -305,6 +312,8 @@ static int zynq_gem_init(struct eth_device *dev, bd_t * bis) struct phy_device *phydev; struct zynq_gem_regs *regs = (struct zynq_gem_regs *)dev->iobase; struct zynq_gem_priv *priv = dev->priv; + struct emac_bd *dummy_tx_bd = &priv->tx_bd[TX_FREE_DESC]; + struct emac_bd *dummy_rx_bd = &priv->tx_bd[TX_FREE_DESC + 2]; const u32 supported = SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full | SUPPORTED_100baseT_Half | @@ -353,6 +362,23 @@ static int zynq_gem_init(struct eth_device *dev, bd_t * bis) /* Setup for Network Control register, MDIO, Rx and Tx enable */ setbits_le32(®s->nwctrl, ZYNQ_GEM_NWCTRL_MDEN_MASK); + /* Disable the second priority queue */ + dummy_tx_bd->addr = 0; + dummy_tx_bd->status = ZYNQ_GEM_TXBUF_WRAP_MASK | + ZYNQ_GEM_TXBUF_LAST_MASK| + ZYNQ_GEM_TXBUF_USED_MASK; + + dummy_rx_bd->addr = ZYNQ_GEM_RXBUF_WRAP_MASK | + ZYNQ_GEM_RXBUF_NEW_MASK; + dummy_rx_bd->status = 0; + flush_dcache_range((ulong)&dummy_tx_bd, (ulong)&dummy_tx_bd + + sizeof(dummy_tx_bd)); + flush_dcache_range((ulong)&dummy_rx_bd, (ulong)&dummy_rx_bd + + sizeof(dummy_rx_bd)); + + writel((ulong)dummy_tx_bd, ®s->transmit_q1_ptr); + writel((ulong)dummy_rx_bd, ®s->receive_q1_ptr); + priv->init++; } -- 2.25.1