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linux/drivers/net/ethernet/altera/altera_tse.h
Vince Bridgers 898305806a Altera TSE: Fix sparse errors and warnings 
This patch fixes the many sparse errors and warnings contained in the
initial submission of the Altera Triple Speed Ethernet driver, and a
few minor cppcheck warnings. Changes are tested on ARM and NIOS2
example designs, and compile tested against multiple architectures.
Typical issues addressed were as follows:

altera_tse_ethtool.c:136:19: warning: incorrect type in argument
    1 (different address spaces)
altera_tse_ethtool.c:136:19:    expected void const volatile
    [noderef] <asn:2>*addr
altera_tse_ethtool.c:136:19:    got unsigned int *<noident>
...
altera_sgdma.c:129:31: warning: cast removes address space of
    expression

Signed-off-by: Vince Bridgers <vbridgers2013@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-05-15 16:46:46 -04:00

538 lines
15 KiB
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/* Altera Triple-Speed Ethernet MAC driver
* Copyright (C) 2008-2014 Altera Corporation. All rights reserved
*
* Contributors:
* Dalon Westergreen
* Thomas Chou
* Ian Abbott
* Yuriy Kozlov
* Tobias Klauser
* Andriy Smolskyy
* Roman Bulgakov
* Dmytro Mytarchuk
* Matthew Gerlach
*
* Original driver contributed by SLS.
* Major updates contributed by GlobalLogic
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __ALTERA_TSE_H__
#define __ALTERA_TSE_H__
#define ALTERA_TSE_RESOURCE_NAME "altera_tse"
#include <linux/bitops.h>
#include <linux/if_vlan.h>
#include <linux/list.h>
#include <linux/netdevice.h>
#include <linux/phy.h>
#define ALTERA_TSE_SW_RESET_WATCHDOG_CNTR 10000
#define ALTERA_TSE_MAC_FIFO_WIDTH 4 /* TX/RX FIFO width in
* bytes
*/
/* Rx FIFO default settings */
#define ALTERA_TSE_RX_SECTION_EMPTY 16
#define ALTERA_TSE_RX_SECTION_FULL 0
#define ALTERA_TSE_RX_ALMOST_EMPTY 8
#define ALTERA_TSE_RX_ALMOST_FULL 8
/* Tx FIFO default settings */
#define ALTERA_TSE_TX_SECTION_EMPTY 16
#define ALTERA_TSE_TX_SECTION_FULL 0
#define ALTERA_TSE_TX_ALMOST_EMPTY 8
#define ALTERA_TSE_TX_ALMOST_FULL 3
/* MAC function configuration default settings */
#define ALTERA_TSE_TX_IPG_LENGTH 12
#define ALTERA_TSE_PAUSE_QUANTA 0xffff
#define GET_BIT_VALUE(v, bit) (((v) >> (bit)) & 0x1)
/* MAC Command_Config Register Bit Definitions
*/
#define MAC_CMDCFG_TX_ENA BIT(0)
#define MAC_CMDCFG_RX_ENA BIT(1)
#define MAC_CMDCFG_XON_GEN BIT(2)
#define MAC_CMDCFG_ETH_SPEED BIT(3)
#define MAC_CMDCFG_PROMIS_EN BIT(4)
#define MAC_CMDCFG_PAD_EN BIT(5)
#define MAC_CMDCFG_CRC_FWD BIT(6)
#define MAC_CMDCFG_PAUSE_FWD BIT(7)
#define MAC_CMDCFG_PAUSE_IGNORE BIT(8)
#define MAC_CMDCFG_TX_ADDR_INS BIT(9)
#define MAC_CMDCFG_HD_ENA BIT(10)
#define MAC_CMDCFG_EXCESS_COL BIT(11)
#define MAC_CMDCFG_LATE_COL BIT(12)
#define MAC_CMDCFG_SW_RESET BIT(13)
#define MAC_CMDCFG_MHASH_SEL BIT(14)
#define MAC_CMDCFG_LOOP_ENA BIT(15)
#define MAC_CMDCFG_TX_ADDR_SEL(v) (((v) & 0x7) << 16)
#define MAC_CMDCFG_MAGIC_ENA BIT(19)
#define MAC_CMDCFG_SLEEP BIT(20)
#define MAC_CMDCFG_WAKEUP BIT(21)
#define MAC_CMDCFG_XOFF_GEN BIT(22)
#define MAC_CMDCFG_CNTL_FRM_ENA BIT(23)
#define MAC_CMDCFG_NO_LGTH_CHECK BIT(24)
#define MAC_CMDCFG_ENA_10 BIT(25)
#define MAC_CMDCFG_RX_ERR_DISC BIT(26)
#define MAC_CMDCFG_DISABLE_READ_TIMEOUT BIT(27)
#define MAC_CMDCFG_CNT_RESET BIT(31)
#define MAC_CMDCFG_TX_ENA_GET(v) GET_BIT_VALUE(v, 0)
#define MAC_CMDCFG_RX_ENA_GET(v) GET_BIT_VALUE(v, 1)
#define MAC_CMDCFG_XON_GEN_GET(v) GET_BIT_VALUE(v, 2)
#define MAC_CMDCFG_ETH_SPEED_GET(v) GET_BIT_VALUE(v, 3)
#define MAC_CMDCFG_PROMIS_EN_GET(v) GET_BIT_VALUE(v, 4)
#define MAC_CMDCFG_PAD_EN_GET(v) GET_BIT_VALUE(v, 5)
#define MAC_CMDCFG_CRC_FWD_GET(v) GET_BIT_VALUE(v, 6)
#define MAC_CMDCFG_PAUSE_FWD_GET(v) GET_BIT_VALUE(v, 7)
#define MAC_CMDCFG_PAUSE_IGNORE_GET(v) GET_BIT_VALUE(v, 8)
#define MAC_CMDCFG_TX_ADDR_INS_GET(v) GET_BIT_VALUE(v, 9)
#define MAC_CMDCFG_HD_ENA_GET(v) GET_BIT_VALUE(v, 10)
#define MAC_CMDCFG_EXCESS_COL_GET(v) GET_BIT_VALUE(v, 11)
#define MAC_CMDCFG_LATE_COL_GET(v) GET_BIT_VALUE(v, 12)
#define MAC_CMDCFG_SW_RESET_GET(v) GET_BIT_VALUE(v, 13)
#define MAC_CMDCFG_MHASH_SEL_GET(v) GET_BIT_VALUE(v, 14)
#define MAC_CMDCFG_LOOP_ENA_GET(v) GET_BIT_VALUE(v, 15)
#define MAC_CMDCFG_TX_ADDR_SEL_GET(v) (((v) >> 16) & 0x7)
#define MAC_CMDCFG_MAGIC_ENA_GET(v) GET_BIT_VALUE(v, 19)
#define MAC_CMDCFG_SLEEP_GET(v) GET_BIT_VALUE(v, 20)
#define MAC_CMDCFG_WAKEUP_GET(v) GET_BIT_VALUE(v, 21)
#define MAC_CMDCFG_XOFF_GEN_GET(v) GET_BIT_VALUE(v, 22)
#define MAC_CMDCFG_CNTL_FRM_ENA_GET(v) GET_BIT_VALUE(v, 23)
#define MAC_CMDCFG_NO_LGTH_CHECK_GET(v) GET_BIT_VALUE(v, 24)
#define MAC_CMDCFG_ENA_10_GET(v) GET_BIT_VALUE(v, 25)
#define MAC_CMDCFG_RX_ERR_DISC_GET(v) GET_BIT_VALUE(v, 26)
#define MAC_CMDCFG_DISABLE_READ_TIMEOUT_GET(v) GET_BIT_VALUE(v, 27)
#define MAC_CMDCFG_CNT_RESET_GET(v) GET_BIT_VALUE(v, 31)
/* MDIO registers within MAC register Space
*/
struct altera_tse_mdio {
u32 control; /* PHY device operation control register */
u32 status; /* PHY device operation status register */
u32 phy_id1; /* Bits 31:16 of PHY identifier */
u32 phy_id2; /* Bits 15:0 of PHY identifier */
u32 auto_negotiation_advertisement; /* Auto-negotiation
* advertisement
* register
*/
u32 remote_partner_base_page_ability;
u32 reg6;
u32 reg7;
u32 reg8;
u32 reg9;
u32 rega;
u32 regb;
u32 regc;
u32 regd;
u32 rege;
u32 regf;
u32 reg10;
u32 reg11;
u32 reg12;
u32 reg13;
u32 reg14;
u32 reg15;
u32 reg16;
u32 reg17;
u32 reg18;
u32 reg19;
u32 reg1a;
u32 reg1b;
u32 reg1c;
u32 reg1d;
u32 reg1e;
u32 reg1f;
};
/* MAC register Space. Note that some of these registers may or may not be
* present depending upon options chosen by the user when the core was
* configured and built. Please consult the Altera Triple Speed Ethernet User
* Guide for details.
*/
struct altera_tse_mac {
/* Bits 15:0: MegaCore function revision (0x0800). Bit 31:16: Customer
* specific revision
*/
u32 megacore_revision;
/* Provides a memory location for user applications to test the device
* memory operation.
*/
u32 scratch_pad;
/* The host processor uses this register to control and configure the
* MAC block
*/
u32 command_config;
/* 32-bit primary MAC address word 0 bits 0 to 31 of the primary
* MAC address
*/
u32 mac_addr_0;
/* 32-bit primary MAC address word 1 bits 32 to 47 of the primary
* MAC address
*/
u32 mac_addr_1;
/* 14-bit maximum frame length. The MAC receive logic */
u32 frm_length;
/* The pause quanta is used in each pause frame sent to a remote
* Ethernet device, in increments of 512 Ethernet bit times
*/
u32 pause_quanta;
/* 12-bit receive FIFO section-empty threshold */
u32 rx_section_empty;
/* 12-bit receive FIFO section-full threshold */
u32 rx_section_full;
/* 12-bit transmit FIFO section-empty threshold */
u32 tx_section_empty;
/* 12-bit transmit FIFO section-full threshold */
u32 tx_section_full;
/* 12-bit receive FIFO almost-empty threshold */
u32 rx_almost_empty;
/* 12-bit receive FIFO almost-full threshold */
u32 rx_almost_full;
/* 12-bit transmit FIFO almost-empty threshold */
u32 tx_almost_empty;
/* 12-bit transmit FIFO almost-full threshold */
u32 tx_almost_full;
/* MDIO address of PHY Device 0. Bits 0 to 4 hold a 5-bit PHY address */
u32 mdio_phy0_addr;
/* MDIO address of PHY Device 1. Bits 0 to 4 hold a 5-bit PHY address */
u32 mdio_phy1_addr;
/* Bit[15:0]—16-bit holdoff quanta */
u32 holdoff_quant;
/* only if 100/1000 BaseX PCS, reserved otherwise */
u32 reserved1[5];
/* Minimum IPG between consecutive transmit frame in terms of bytes */
u32 tx_ipg_length;
/* IEEE 802.3 oEntity Managed Object Support */
/* The MAC addresses */
u32 mac_id_1;
u32 mac_id_2;
/* Number of frames transmitted without error including pause frames */
u32 frames_transmitted_ok;
/* Number of frames received without error including pause frames */
u32 frames_received_ok;
/* Number of frames received with a CRC error */
u32 frames_check_sequence_errors;
/* Frame received with an alignment error */
u32 alignment_errors;
/* Sum of payload and padding octets of frames transmitted without
* error
*/
u32 octets_transmitted_ok;
/* Sum of payload and padding octets of frames received without error */
u32 octets_received_ok;
/* IEEE 802.3 oPausedEntity Managed Object Support */
/* Number of transmitted pause frames */
u32 tx_pause_mac_ctrl_frames;
/* Number of Received pause frames */
u32 rx_pause_mac_ctrl_frames;
/* IETF MIB (MIB-II) Object Support */
/* Number of frames received with error */
u32 if_in_errors;
/* Number of frames transmitted with error */
u32 if_out_errors;
/* Number of valid received unicast frames */
u32 if_in_ucast_pkts;
/* Number of valid received multicasts frames (without pause) */
u32 if_in_multicast_pkts;
/* Number of valid received broadcast frames */
u32 if_in_broadcast_pkts;
u32 if_out_discards;
/* The number of valid unicast frames transmitted */
u32 if_out_ucast_pkts;
/* The number of valid multicast frames transmitted,
* excluding pause frames
*/
u32 if_out_multicast_pkts;
u32 if_out_broadcast_pkts;
/* IETF RMON MIB Object Support */
/* Counts the number of dropped packets due to internal errors
* of the MAC client.
*/
u32 ether_stats_drop_events;
/* Total number of bytes received. Good and bad frames. */
u32 ether_stats_octets;
/* Total number of packets received. Counts good and bad packets. */
u32 ether_stats_pkts;
/* Number of packets received with less than 64 bytes. */
u32 ether_stats_undersize_pkts;
/* The number of frames received that are longer than the
* value configured in the frm_length register
*/
u32 ether_stats_oversize_pkts;
/* Number of received packet with 64 bytes */
u32 ether_stats_pkts_64_octets;
/* Frames (good and bad) with 65 to 127 bytes */
u32 ether_stats_pkts_65to127_octets;
/* Frames (good and bad) with 128 to 255 bytes */
u32 ether_stats_pkts_128to255_octets;
/* Frames (good and bad) with 256 to 511 bytes */
u32 ether_stats_pkts_256to511_octets;
/* Frames (good and bad) with 512 to 1023 bytes */
u32 ether_stats_pkts_512to1023_octets;
/* Frames (good and bad) with 1024 to 1518 bytes */
u32 ether_stats_pkts_1024to1518_octets;
/* Any frame length from 1519 to the maximum length configured in the
* frm_length register, if it is greater than 1518
*/
u32 ether_stats_pkts_1519tox_octets;
/* Too long frames with CRC error */
u32 ether_stats_jabbers;
/* Too short frames with CRC error */
u32 ether_stats_fragments;
u32 reserved2;
/* FIFO control register */
u32 tx_cmd_stat;
u32 rx_cmd_stat;
/* Extended Statistics Counters */
u32 msb_octets_transmitted_ok;
u32 msb_octets_received_ok;
u32 msb_ether_stats_octets;
u32 reserved3;
/* Multicast address resolution table, mapped in the controller address
* space
*/
u32 hash_table[64];
/* Registers 0 to 31 within PHY device 0/1 connected to the MDIO PHY
* management interface
*/
struct altera_tse_mdio mdio_phy0;
struct altera_tse_mdio mdio_phy1;
/* 4 Supplemental MAC Addresses */
u32 supp_mac_addr_0_0;
u32 supp_mac_addr_0_1;
u32 supp_mac_addr_1_0;
u32 supp_mac_addr_1_1;
u32 supp_mac_addr_2_0;
u32 supp_mac_addr_2_1;
u32 supp_mac_addr_3_0;
u32 supp_mac_addr_3_1;
u32 reserved4[8];
/* IEEE 1588v2 Feature */
u32 tx_period;
u32 tx_adjust_fns;
u32 tx_adjust_ns;
u32 rx_period;
u32 rx_adjust_fns;
u32 rx_adjust_ns;
u32 reserved5[42];
};
#define tse_csroffs(a) (offsetof(struct altera_tse_mac, a))
/* Transmit and Receive Command Registers Bit Definitions
*/
#define ALTERA_TSE_TX_CMD_STAT_OMIT_CRC BIT(17)
#define ALTERA_TSE_TX_CMD_STAT_TX_SHIFT16 BIT(18)
#define ALTERA_TSE_RX_CMD_STAT_RX_SHIFT16 BIT(25)
/* Wrapper around a pointer to a socket buffer,
* so a DMA handle can be stored along with the buffer
*/
struct tse_buffer {
struct list_head lh;
struct sk_buff *skb;
dma_addr_t dma_addr;
u32 len;
int mapped_as_page;
};
struct altera_tse_private;
#define ALTERA_DTYPE_SGDMA 1
#define ALTERA_DTYPE_MSGDMA 2
/* standard DMA interface for SGDMA and MSGDMA */
struct altera_dmaops {
int altera_dtype;
int dmamask;
void (*reset_dma)(struct altera_tse_private *);
void (*enable_txirq)(struct altera_tse_private *);
void (*enable_rxirq)(struct altera_tse_private *);
void (*disable_txirq)(struct altera_tse_private *);
void (*disable_rxirq)(struct altera_tse_private *);
void (*clear_txirq)(struct altera_tse_private *);
void (*clear_rxirq)(struct altera_tse_private *);
int (*tx_buffer)(struct altera_tse_private *, struct tse_buffer *);
u32 (*tx_completions)(struct altera_tse_private *);
void (*add_rx_desc)(struct altera_tse_private *, struct tse_buffer *);
u32 (*get_rx_status)(struct altera_tse_private *);
int (*init_dma)(struct altera_tse_private *);
void (*uninit_dma)(struct altera_tse_private *);
void (*start_rxdma)(struct altera_tse_private *);
};
/* This structure is private to each device.
*/
struct altera_tse_private {
struct net_device *dev;
struct device *device;
struct napi_struct napi;
/* MAC address space */
struct altera_tse_mac __iomem *mac_dev;
/* TSE Revision */
u32 revision;
/* mSGDMA Rx Dispatcher address space */
void __iomem *rx_dma_csr;
void __iomem *rx_dma_desc;
void __iomem *rx_dma_resp;
/* mSGDMA Tx Dispatcher address space */
void __iomem *tx_dma_csr;
void __iomem *tx_dma_desc;
/* Rx buffers queue */
struct tse_buffer *rx_ring;
u32 rx_cons;
u32 rx_prod;
u32 rx_ring_size;
u32 rx_dma_buf_sz;
/* Tx ring buffer */
struct tse_buffer *tx_ring;
u32 tx_prod;
u32 tx_cons;
u32 tx_ring_size;
/* Interrupts */
u32 tx_irq;
u32 rx_irq;
/* RX/TX MAC FIFO configs */
u32 tx_fifo_depth;
u32 rx_fifo_depth;
u32 max_mtu;
/* Hash filter settings */
u32 hash_filter;
u32 added_unicast;
/* Descriptor memory info for managing SGDMA */
u32 txdescmem;
u32 rxdescmem;
dma_addr_t rxdescmem_busaddr;
dma_addr_t txdescmem_busaddr;
u32 txctrlreg;
u32 rxctrlreg;
dma_addr_t rxdescphys;
dma_addr_t txdescphys;
size_t sgdmadesclen;
struct list_head txlisthd;
struct list_head rxlisthd;
/* MAC command_config register protection */
spinlock_t mac_cfg_lock;
/* Tx path protection */
spinlock_t tx_lock;
/* Rx DMA & interrupt control protection */
spinlock_t rxdma_irq_lock;
/* PHY */
int phy_addr; /* PHY's MDIO address, -1 for autodetection */
phy_interface_t phy_iface;
struct mii_bus *mdio;
struct phy_device *phydev;
int oldspeed;
int oldduplex;
int oldlink;
/* ethtool msglvl option */
u32 msg_enable;
struct altera_dmaops *dmaops;
};
/* Function prototypes
*/
void altera_tse_set_ethtool_ops(struct net_device *);
static inline
u32 csrrd32(void __iomem *mac, size_t offs)
{
void __iomem *paddr = (void __iomem *)((uintptr_t)mac + offs);
return readl(paddr);
}
static inline
u16 csrrd16(void __iomem *mac, size_t offs)
{
void __iomem *paddr = (void __iomem *)((uintptr_t)mac + offs);
return readw(paddr);
}
static inline
u8 csrrd8(void __iomem *mac, size_t offs)
{
void __iomem *paddr = (void __iomem *)((uintptr_t)mac + offs);
return readb(paddr);
}
static inline
void csrwr32(u32 val, void __iomem *mac, size_t offs)
{
void __iomem *paddr = (void __iomem *)((uintptr_t)mac + offs);
writel(val, paddr);
}
static inline
void csrwr16(u16 val, void __iomem *mac, size_t offs)
{
void __iomem *paddr = (void __iomem *)((uintptr_t)mac + offs);
writew(val, paddr);
}
static inline
void csrwr8(u8 val, void __iomem *mac, size_t offs)
{
void __iomem *paddr = (void __iomem *)((uintptr_t)mac + offs);
writeb(val, paddr);
}
#endif /* __ALTERA_TSE_H__ */
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