diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2021-04-29 11:57:23 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-04-29 11:57:23 -0700 |
commit | 9d31d2338950293ec19d9b095fbaa9030899dcb4 (patch) | |
tree | e688040d0557c24a2eeb9f6c9c223d949f6f7ef9 /drivers/net/ethernet/korina.c | |
parent | 635de956a7f5a6ffcb04f29d70630c64c717b56b (diff) | |
parent | 4a52dd8fefb45626dace70a63c0738dbd83b7edb (diff) | |
download | linux-stable-9d31d2338950293ec19d9b095fbaa9030899dcb4.tar.gz linux-stable-9d31d2338950293ec19d9b095fbaa9030899dcb4.tar.bz2 linux-stable-9d31d2338950293ec19d9b095fbaa9030899dcb4.zip |
Merge tag 'net-next-5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
Pull networking updates from Jakub Kicinski:
"Core:
- bpf:
- allow bpf programs calling kernel functions (initially to
reuse TCP congestion control implementations)
- enable task local storage for tracing programs - remove the
need to store per-task state in hash maps, and allow tracing
programs access to task local storage previously added for
BPF_LSM
- add bpf_for_each_map_elem() helper, allowing programs to walk
all map elements in a more robust and easier to verify fashion
- sockmap: support UDP and cross-protocol BPF_SK_SKB_VERDICT
redirection
- lpm: add support for batched ops in LPM trie
- add BTF_KIND_FLOAT support - mostly to allow use of BTF on
s390 which has floats in its headers files
- improve BPF syscall documentation and extend the use of kdoc
parsing scripts we already employ for bpf-helpers
- libbpf, bpftool: support static linking of BPF ELF files
- improve support for encapsulation of L2 packets
- xdp: restructure redirect actions to avoid a runtime lookup,
improving performance by 4-8% in microbenchmarks
- xsk: build skb by page (aka generic zerocopy xmit) - improve
performance of software AF_XDP path by 33% for devices which don't
need headers in the linear skb part (e.g. virtio)
- nexthop: resilient next-hop groups - improve path stability on
next-hops group changes (incl. offload for mlxsw)
- ipv6: segment routing: add support for IPv4 decapsulation
- icmp: add support for RFC 8335 extended PROBE messages
- inet: use bigger hash table for IP ID generation
- tcp: deal better with delayed TX completions - make sure we don't
give up on fast TCP retransmissions only because driver is slow in
reporting that it completed transmitting the original
- tcp: reorder tcp_congestion_ops for better cache locality
- mptcp:
- add sockopt support for common TCP options
- add support for common TCP msg flags
- include multiple address ids in RM_ADDR
- add reset option support for resetting one subflow
- udp: GRO L4 improvements - improve 'forward' / 'frag_list'
co-existence with UDP tunnel GRO, allowing the first to take place
correctly even for encapsulated UDP traffic
- micro-optimize dev_gro_receive() and flow dissection, avoid
retpoline overhead on VLAN and TEB GRO
- use less memory for sysctls, add a new sysctl type, to allow using
u8 instead of "int" and "long" and shrink networking sysctls
- veth: allow GRO without XDP - this allows aggregating UDP packets
before handing them off to routing, bridge, OvS, etc.
- allow specifing ifindex when device is moved to another namespace
- netfilter:
- nft_socket: add support for cgroupsv2
- nftables: add catch-all set element - special element used to
define a default action in case normal lookup missed
- use net_generic infra in many modules to avoid allocating
per-ns memory unnecessarily
- xps: improve the xps handling to avoid potential out-of-bound
accesses and use-after-free when XPS change race with other
re-configuration under traffic
- add a config knob to turn off per-cpu netdev refcnt to catch
underflows in testing
Device APIs:
- add WWAN subsystem to organize the WWAN interfaces better and
hopefully start driving towards more unified and vendor-
independent APIs
- ethtool:
- add interface for reading IEEE MIB stats (incl. mlx5 and bnxt
support)
- allow network drivers to dump arbitrary SFP EEPROM data,
current offset+length API was a poor fit for modern SFP which
define EEPROM in terms of pages (incl. mlx5 support)
- act_police, flow_offload: add support for packet-per-second
policing (incl. offload for nfp)
- psample: add additional metadata attributes like transit delay for
packets sampled from switch HW (and corresponding egress and
policy-based sampling in the mlxsw driver)
- dsa: improve support for sandwiched LAGs with bridge and DSA
- netfilter:
- flowtable: use direct xmit in topologies with IP forwarding,
bridging, vlans etc.
- nftables: counter hardware offload support
- Bluetooth:
- improvements for firmware download w/ Intel devices
- add support for reading AOSP vendor capabilities
- add support for virtio transport driver
- mac80211:
- allow concurrent monitor iface and ethernet rx decap
- set priority and queue mapping for injected frames
- phy: add support for Clause-45 PHY Loopback
- pci/iov: add sysfs MSI-X vector assignment interface to distribute
MSI-X resources to VFs (incl. mlx5 support)
New hardware/drivers:
- dsa: mv88e6xxx: add support for Marvell mv88e6393x - 11-port
Ethernet switch with 8x 1-Gigabit Ethernet and 3x 10-Gigabit
interfaces.
- dsa: support for legacy Broadcom tags used on BCM5325, BCM5365 and
BCM63xx switches
- Microchip KSZ8863 and KSZ8873; 3x 10/100Mbps Ethernet switches
- ath11k: support for QCN9074 a 802.11ax device
- Bluetooth: Broadcom BCM4330 and BMC4334
- phy: Marvell 88X2222 transceiver support
- mdio: add BCM6368 MDIO mux bus controller
- r8152: support RTL8153 and RTL8156 (USB Ethernet) chips
- mana: driver for Microsoft Azure Network Adapter (MANA)
- Actions Semi Owl Ethernet MAC
- can: driver for ETAS ES58X CAN/USB interfaces
Pure driver changes:
- add XDP support to: enetc, igc, stmmac
- add AF_XDP support to: stmmac
- virtio:
- page_to_skb() use build_skb when there's sufficient tailroom
(21% improvement for 1000B UDP frames)
- support XDP even without dedicated Tx queues - share the Tx
queues with the stack when necessary
- mlx5:
- flow rules: add support for mirroring with conntrack, matching
on ICMP, GTP, flex filters and more
- support packet sampling with flow offloads
- persist uplink representor netdev across eswitch mode changes
- allow coexistence of CQE compression and HW time-stamping
- add ethtool extended link error state reporting
- ice, iavf: support flow filters, UDP Segmentation Offload
- dpaa2-switch:
- move the driver out of staging
- add spanning tree (STP) support
- add rx copybreak support
- add tc flower hardware offload on ingress traffic
- ionic:
- implement Rx page reuse
- support HW PTP time-stamping
- octeon: support TC hardware offloads - flower matching on ingress
and egress ratelimitting.
- stmmac:
- add RX frame steering based on VLAN priority in tc flower
- support frame preemption (FPE)
- intel: add cross time-stamping freq difference adjustment
- ocelot:
- support forwarding of MRP frames in HW
- support multiple bridges
- support PTP Sync one-step timestamping
- dsa: mv88e6xxx, dpaa2-switch: offload bridge port flags like
learning, flooding etc.
- ipa: add IPA v4.5, v4.9 and v4.11 support (Qualcomm SDX55, SM8350,
SC7280 SoCs)
- mt7601u: enable TDLS support
- mt76:
- add support for 802.3 rx frames (mt7915/mt7615)
- mt7915 flash pre-calibration support
- mt7921/mt7663 runtime power management fixes"
* tag 'net-next-5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (2451 commits)
net: selftest: fix build issue if INET is disabled
net: netrom: nr_in: Remove redundant assignment to ns
net: tun: Remove redundant assignment to ret
net: phy: marvell: add downshift support for M88E1240
net: dsa: ksz: Make reg_mib_cnt a u8 as it never exceeds 255
net/sched: act_ct: Remove redundant ct get and check
icmp: standardize naming of RFC 8335 PROBE constants
bpf, selftests: Update array map tests for per-cpu batched ops
bpf: Add batched ops support for percpu array
bpf: Implement formatted output helpers with bstr_printf
seq_file: Add a seq_bprintf function
sfc: adjust efx->xdp_tx_queue_count with the real number of initialized queues
net:nfc:digital: Fix a double free in digital_tg_recv_dep_req
net: fix a concurrency bug in l2tp_tunnel_register()
net/smc: Remove redundant assignment to rc
mpls: Remove redundant assignment to err
llc2: Remove redundant assignment to rc
net/tls: Remove redundant initialization of record
rds: Remove redundant assignment to nr_sig
dt-bindings: net: mdio-gpio: add compatible for microchip,mdio-smi0
...
Diffstat (limited to 'drivers/net/ethernet/korina.c')
-rw-r--r-- | drivers/net/ethernet/korina.c | 617 |
1 files changed, 439 insertions, 178 deletions
diff --git a/drivers/net/ethernet/korina.c b/drivers/net/ethernet/korina.c index 925161959b9b..6f987a7ffcb3 100644 --- a/drivers/net/ethernet/korina.c +++ b/drivers/net/ethernet/korina.c @@ -41,7 +41,10 @@ #include <linux/types.h> #include <linux/interrupt.h> #include <linux/ioport.h> +#include <linux/iopoll.h> #include <linux/in.h> +#include <linux/of_device.h> +#include <linux/of_net.h> #include <linux/slab.h> #include <linux/string.h> #include <linux/delay.h> @@ -54,21 +57,246 @@ #include <linux/ethtool.h> #include <linux/crc32.h> #include <linux/pgtable.h> - -#include <asm/bootinfo.h> -#include <asm/bitops.h> -#include <asm/io.h> -#include <asm/dma.h> - -#include <asm/mach-rc32434/rb.h> -#include <asm/mach-rc32434/rc32434.h> -#include <asm/mach-rc32434/eth.h> -#include <asm/mach-rc32434/dma_v.h> +#include <linux/clk.h> #define DRV_NAME "korina" #define DRV_VERSION "0.20" #define DRV_RELDATE "15Sep2017" +struct eth_regs { + u32 ethintfc; + u32 ethfifott; + u32 etharc; + u32 ethhash0; + u32 ethhash1; + u32 ethu0[4]; /* Reserved. */ + u32 ethpfs; + u32 ethmcp; + u32 eth_u1[10]; /* Reserved. */ + u32 ethspare; + u32 eth_u2[42]; /* Reserved. */ + u32 ethsal0; + u32 ethsah0; + u32 ethsal1; + u32 ethsah1; + u32 ethsal2; + u32 ethsah2; + u32 ethsal3; + u32 ethsah3; + u32 ethrbc; + u32 ethrpc; + u32 ethrupc; + u32 ethrfc; + u32 ethtbc; + u32 ethgpf; + u32 eth_u9[50]; /* Reserved. */ + u32 ethmac1; + u32 ethmac2; + u32 ethipgt; + u32 ethipgr; + u32 ethclrt; + u32 ethmaxf; + u32 eth_u10; /* Reserved. */ + u32 ethmtest; + u32 miimcfg; + u32 miimcmd; + u32 miimaddr; + u32 miimwtd; + u32 miimrdd; + u32 miimind; + u32 eth_u11; /* Reserved. */ + u32 eth_u12; /* Reserved. */ + u32 ethcfsa0; + u32 ethcfsa1; + u32 ethcfsa2; +}; + +/* Ethernet interrupt registers */ +#define ETH_INT_FC_EN BIT(0) +#define ETH_INT_FC_ITS BIT(1) +#define ETH_INT_FC_RIP BIT(2) +#define ETH_INT_FC_JAM BIT(3) +#define ETH_INT_FC_OVR BIT(4) +#define ETH_INT_FC_UND BIT(5) +#define ETH_INT_FC_IOC 0x000000c0 + +/* Ethernet FIFO registers */ +#define ETH_FIFI_TT_TTH_BIT 0 +#define ETH_FIFO_TT_TTH 0x0000007f + +/* Ethernet ARC/multicast registers */ +#define ETH_ARC_PRO BIT(0) +#define ETH_ARC_AM BIT(1) +#define ETH_ARC_AFM BIT(2) +#define ETH_ARC_AB BIT(3) + +/* Ethernet SAL registers */ +#define ETH_SAL_BYTE_5 0x000000ff +#define ETH_SAL_BYTE_4 0x0000ff00 +#define ETH_SAL_BYTE_3 0x00ff0000 +#define ETH_SAL_BYTE_2 0xff000000 + +/* Ethernet SAH registers */ +#define ETH_SAH_BYTE1 0x000000ff +#define ETH_SAH_BYTE0 0x0000ff00 + +/* Ethernet GPF register */ +#define ETH_GPF_PTV 0x0000ffff + +/* Ethernet PFG register */ +#define ETH_PFS_PFD BIT(0) + +/* Ethernet CFSA[0-3] registers */ +#define ETH_CFSA0_CFSA4 0x000000ff +#define ETH_CFSA0_CFSA5 0x0000ff00 +#define ETH_CFSA1_CFSA2 0x000000ff +#define ETH_CFSA1_CFSA3 0x0000ff00 +#define ETH_CFSA1_CFSA0 0x000000ff +#define ETH_CFSA1_CFSA1 0x0000ff00 + +/* Ethernet MAC1 registers */ +#define ETH_MAC1_RE BIT(0) +#define ETH_MAC1_PAF BIT(1) +#define ETH_MAC1_RFC BIT(2) +#define ETH_MAC1_TFC BIT(3) +#define ETH_MAC1_LB BIT(4) +#define ETH_MAC1_MR BIT(31) + +/* Ethernet MAC2 registers */ +#define ETH_MAC2_FD BIT(0) +#define ETH_MAC2_FLC BIT(1) +#define ETH_MAC2_HFE BIT(2) +#define ETH_MAC2_DC BIT(3) +#define ETH_MAC2_CEN BIT(4) +#define ETH_MAC2_PE BIT(5) +#define ETH_MAC2_VPE BIT(6) +#define ETH_MAC2_APE BIT(7) +#define ETH_MAC2_PPE BIT(8) +#define ETH_MAC2_LPE BIT(9) +#define ETH_MAC2_NB BIT(12) +#define ETH_MAC2_BP BIT(13) +#define ETH_MAC2_ED BIT(14) + +/* Ethernet IPGT register */ +#define ETH_IPGT 0x0000007f + +/* Ethernet IPGR registers */ +#define ETH_IPGR_IPGR2 0x0000007f +#define ETH_IPGR_IPGR1 0x00007f00 + +/* Ethernet CLRT registers */ +#define ETH_CLRT_MAX_RET 0x0000000f +#define ETH_CLRT_COL_WIN 0x00003f00 + +/* Ethernet MAXF register */ +#define ETH_MAXF 0x0000ffff + +/* Ethernet test registers */ +#define ETH_TEST_REG BIT(2) +#define ETH_MCP_DIV 0x000000ff + +/* MII registers */ +#define ETH_MII_CFG_RSVD 0x0000000c +#define ETH_MII_CMD_RD BIT(0) +#define ETH_MII_CMD_SCN BIT(1) +#define ETH_MII_REG_ADDR 0x0000001f +#define ETH_MII_PHY_ADDR 0x00001f00 +#define ETH_MII_WTD_DATA 0x0000ffff +#define ETH_MII_RDD_DATA 0x0000ffff +#define ETH_MII_IND_BSY BIT(0) +#define ETH_MII_IND_SCN BIT(1) +#define ETH_MII_IND_NV BIT(2) + +/* Values for the DEVCS field of the Ethernet DMA Rx and Tx descriptors. */ +#define ETH_RX_FD BIT(0) +#define ETH_RX_LD BIT(1) +#define ETH_RX_ROK BIT(2) +#define ETH_RX_FM BIT(3) +#define ETH_RX_MP BIT(4) +#define ETH_RX_BP BIT(5) +#define ETH_RX_VLT BIT(6) +#define ETH_RX_CF BIT(7) +#define ETH_RX_OVR BIT(8) +#define ETH_RX_CRC BIT(9) +#define ETH_RX_CV BIT(10) +#define ETH_RX_DB BIT(11) +#define ETH_RX_LE BIT(12) +#define ETH_RX_LOR BIT(13) +#define ETH_RX_CES BIT(14) +#define ETH_RX_LEN_BIT 16 +#define ETH_RX_LEN 0xffff0000 + +#define ETH_TX_FD BIT(0) +#define ETH_TX_LD BIT(1) +#define ETH_TX_OEN BIT(2) +#define ETH_TX_PEN BIT(3) +#define ETH_TX_CEN BIT(4) +#define ETH_TX_HEN BIT(5) +#define ETH_TX_TOK BIT(6) +#define ETH_TX_MP BIT(7) +#define ETH_TX_BP BIT(8) +#define ETH_TX_UND BIT(9) +#define ETH_TX_OF BIT(10) +#define ETH_TX_ED BIT(11) +#define ETH_TX_EC BIT(12) +#define ETH_TX_LC BIT(13) +#define ETH_TX_TD BIT(14) +#define ETH_TX_CRC BIT(15) +#define ETH_TX_LE BIT(16) +#define ETH_TX_CC 0x001E0000 + +/* DMA descriptor (in physical memory). */ +struct dma_desc { + u32 control; /* Control. use DMAD_* */ + u32 ca; /* Current Address. */ + u32 devcs; /* Device control and status. */ + u32 link; /* Next descriptor in chain. */ +}; + +#define DMA_DESC_COUNT_BIT 0 +#define DMA_DESC_COUNT_MSK 0x0003ffff +#define DMA_DESC_DS_BIT 20 +#define DMA_DESC_DS_MSK 0x00300000 + +#define DMA_DESC_DEV_CMD_BIT 22 +#define DMA_DESC_DEV_CMD_MSK 0x01c00000 + +/* DMA descriptors interrupts */ +#define DMA_DESC_COF BIT(25) /* Chain on finished */ +#define DMA_DESC_COD BIT(26) /* Chain on done */ +#define DMA_DESC_IOF BIT(27) /* Interrupt on finished */ +#define DMA_DESC_IOD BIT(28) /* Interrupt on done */ +#define DMA_DESC_TERM BIT(29) /* Terminated */ +#define DMA_DESC_DONE BIT(30) /* Done */ +#define DMA_DESC_FINI BIT(31) /* Finished */ + +/* DMA register (within Internal Register Map). */ +struct dma_reg { + u32 dmac; /* Control. */ + u32 dmas; /* Status. */ + u32 dmasm; /* Mask. */ + u32 dmadptr; /* Descriptor pointer. */ + u32 dmandptr; /* Next descriptor pointer. */ +}; + +/* DMA channels specific registers */ +#define DMA_CHAN_RUN_BIT BIT(0) +#define DMA_CHAN_DONE_BIT BIT(1) +#define DMA_CHAN_MODE_BIT BIT(2) +#define DMA_CHAN_MODE_MSK 0x0000000c +#define DMA_CHAN_MODE_AUTO 0 +#define DMA_CHAN_MODE_BURST 1 +#define DMA_CHAN_MODE_XFRT 2 +#define DMA_CHAN_MODE_RSVD 3 +#define DMA_CHAN_ACT_BIT BIT(4) + +/* DMA status registers */ +#define DMA_STAT_FINI BIT(0) +#define DMA_STAT_DONE BIT(1) +#define DMA_STAT_CHAIN BIT(2) +#define DMA_STAT_ERR BIT(3) +#define DMA_STAT_HALT BIT(4) + #define STATION_ADDRESS_HIGH(dev) (((dev)->dev_addr[0] << 8) | \ ((dev)->dev_addr[1])) #define STATION_ADDRESS_LOW(dev) (((dev)->dev_addr[2] << 24) | \ @@ -95,24 +323,30 @@ enum chain_status { desc_filled, - desc_empty + desc_is_empty }; +#define DMA_COUNT(count) ((count) & DMA_DESC_COUNT_MSK) #define IS_DMA_FINISHED(X) (((X) & (DMA_DESC_FINI)) != 0) #define IS_DMA_DONE(X) (((X) & (DMA_DESC_DONE)) != 0) #define RCVPKT_LENGTH(X) (((X) & ETH_RX_LEN) >> ETH_RX_LEN_BIT) /* Information that need to be kept for each board. */ struct korina_private { - struct eth_regs *eth_regs; - struct dma_reg *rx_dma_regs; - struct dma_reg *tx_dma_regs; + struct eth_regs __iomem *eth_regs; + struct dma_reg __iomem *rx_dma_regs; + struct dma_reg __iomem *tx_dma_regs; struct dma_desc *td_ring; /* transmit descriptor ring */ struct dma_desc *rd_ring; /* receive descriptor ring */ + dma_addr_t td_dma; + dma_addr_t rd_dma; struct sk_buff *tx_skb[KORINA_NUM_TDS]; struct sk_buff *rx_skb[KORINA_NUM_RDS]; + dma_addr_t rx_skb_dma[KORINA_NUM_RDS]; + dma_addr_t tx_skb_dma[KORINA_NUM_TDS]; + int rx_next_done; int rx_chain_head; int rx_chain_tail; @@ -137,15 +371,18 @@ struct korina_private { struct mii_if_info mii_if; struct work_struct restart_task; struct net_device *dev; - int phy_addr; + struct device *dmadev; + int mii_clock_freq; }; -extern unsigned int idt_cpu_freq; +static dma_addr_t korina_tx_dma(struct korina_private *lp, int idx) +{ + return lp->td_dma + (idx * sizeof(struct dma_desc)); +} -static inline void korina_start_dma(struct dma_reg *ch, u32 dma_addr) +static dma_addr_t korina_rx_dma(struct korina_private *lp, int idx) { - writel(0, &ch->dmandptr); - writel(dma_addr, &ch->dmadptr); + return lp->rd_dma + (idx * sizeof(struct dma_desc)); } static inline void korina_abort_dma(struct net_device *dev, @@ -164,11 +401,6 @@ static inline void korina_abort_dma(struct net_device *dev, writel(0, &ch->dmandptr); } -static inline void korina_chain_dma(struct dma_reg *ch, u32 dma_addr) -{ - writel(dma_addr, &ch->dmandptr); -} - static void korina_abort_tx(struct net_device *dev) { struct korina_private *lp = netdev_priv(dev); @@ -183,30 +415,21 @@ static void korina_abort_rx(struct net_device *dev) korina_abort_dma(dev, lp->rx_dma_regs); } -static void korina_start_rx(struct korina_private *lp, - struct dma_desc *rd) -{ - korina_start_dma(lp->rx_dma_regs, CPHYSADDR(rd)); -} - -static void korina_chain_rx(struct korina_private *lp, - struct dma_desc *rd) -{ - korina_chain_dma(lp->rx_dma_regs, CPHYSADDR(rd)); -} - /* transmit packet */ static int korina_send_packet(struct sk_buff *skb, struct net_device *dev) { struct korina_private *lp = netdev_priv(dev); - unsigned long flags; - u32 length; u32 chain_prev, chain_next; + unsigned long flags; struct dma_desc *td; + dma_addr_t ca; + u32 length; + int idx; spin_lock_irqsave(&lp->lock, flags); - td = &lp->td_ring[lp->tx_chain_tail]; + idx = lp->tx_chain_tail; + td = &lp->td_ring[idx]; /* stop queue when full, drop pkts if queue already full */ if (lp->tx_count >= (KORINA_NUM_TDS - 2)) { @@ -214,38 +437,37 @@ static int korina_send_packet(struct sk_buff *skb, struct net_device *dev) if (lp->tx_count == (KORINA_NUM_TDS - 2)) netif_stop_queue(dev); - else { - dev->stats.tx_dropped++; - dev_kfree_skb_any(skb); - spin_unlock_irqrestore(&lp->lock, flags); - - return NETDEV_TX_OK; - } + else + goto drop_packet; } lp->tx_count++; - lp->tx_skb[lp->tx_chain_tail] = skb; + lp->tx_skb[idx] = skb; length = skb->len; - dma_cache_wback((u32)skb->data, skb->len); /* Setup the transmit descriptor. */ - dma_cache_inv((u32) td, sizeof(*td)); - td->ca = CPHYSADDR(skb->data); - chain_prev = (lp->tx_chain_tail - 1) & KORINA_TDS_MASK; - chain_next = (lp->tx_chain_tail + 1) & KORINA_TDS_MASK; + ca = dma_map_single(lp->dmadev, skb->data, length, DMA_TO_DEVICE); + if (dma_mapping_error(lp->dmadev, ca)) + goto drop_packet; + + lp->tx_skb_dma[idx] = ca; + td->ca = ca; + + chain_prev = (idx - 1) & KORINA_TDS_MASK; + chain_next = (idx + 1) & KORINA_TDS_MASK; if (readl(&(lp->tx_dma_regs->dmandptr)) == 0) { - if (lp->tx_chain_status == desc_empty) { + if (lp->tx_chain_status == desc_is_empty) { /* Update tail */ td->control = DMA_COUNT(length) | DMA_DESC_COF | DMA_DESC_IOF; /* Move tail */ lp->tx_chain_tail = chain_next; /* Write to NDPTR */ - writel(CPHYSADDR(&lp->td_ring[lp->tx_chain_head]), - &lp->tx_dma_regs->dmandptr); + writel(korina_tx_dma(lp, lp->tx_chain_head), + &lp->tx_dma_regs->dmandptr); /* Move head to tail */ lp->tx_chain_head = lp->tx_chain_tail; } else { @@ -256,18 +478,18 @@ static int korina_send_packet(struct sk_buff *skb, struct net_device *dev) lp->td_ring[chain_prev].control &= ~DMA_DESC_COF; /* Link to prev */ - lp->td_ring[chain_prev].link = CPHYSADDR(td); + lp->td_ring[chain_prev].link = korina_tx_dma(lp, idx); /* Move tail */ lp->tx_chain_tail = chain_next; /* Write to NDPTR */ - writel(CPHYSADDR(&lp->td_ring[lp->tx_chain_head]), - &(lp->tx_dma_regs->dmandptr)); + writel(korina_tx_dma(lp, lp->tx_chain_head), + &lp->tx_dma_regs->dmandptr); /* Move head to tail */ lp->tx_chain_head = lp->tx_chain_tail; - lp->tx_chain_status = desc_empty; + lp->tx_chain_status = desc_is_empty; } } else { - if (lp->tx_chain_status == desc_empty) { + if (lp->tx_chain_status == desc_is_empty) { /* Update tail */ td->control = DMA_COUNT(length) | DMA_DESC_COF | DMA_DESC_IOF; @@ -280,44 +502,66 @@ static int korina_send_packet(struct sk_buff *skb, struct net_device *dev) DMA_DESC_COF | DMA_DESC_IOF; lp->td_ring[chain_prev].control &= ~DMA_DESC_COF; - lp->td_ring[chain_prev].link = CPHYSADDR(td); + lp->td_ring[chain_prev].link = korina_tx_dma(lp, idx); lp->tx_chain_tail = chain_next; } } - dma_cache_wback((u32) td, sizeof(*td)); netif_trans_update(dev); spin_unlock_irqrestore(&lp->lock, flags); return NETDEV_TX_OK; + +drop_packet: + dev->stats.tx_dropped++; + dev_kfree_skb_any(skb); + spin_unlock_irqrestore(&lp->lock, flags); + + return NETDEV_TX_OK; } -static int mdio_read(struct net_device *dev, int mii_id, int reg) +static int korina_mdio_wait(struct korina_private *lp) +{ + u32 value; + + return readl_poll_timeout_atomic(&lp->eth_regs->miimind, + value, value & ETH_MII_IND_BSY, + 1, 1000); +} + +static int korina_mdio_read(struct net_device *dev, int phy, int reg) { struct korina_private *lp = netdev_priv(dev); int ret; - mii_id = ((lp->rx_irq == 0x2c ? 1 : 0) << 8); + ret = korina_mdio_wait(lp); + if (ret < 0) + return ret; - writel(0, &lp->eth_regs->miimcfg); - writel(0, &lp->eth_regs->miimcmd); - writel(mii_id | reg, &lp->eth_regs->miimaddr); - writel(ETH_MII_CMD_SCN, &lp->eth_regs->miimcmd); + writel(phy << 8 | reg, &lp->eth_regs->miimaddr); + writel(1, &lp->eth_regs->miimcmd); + + ret = korina_mdio_wait(lp); + if (ret < 0) + return ret; - ret = (int)(readl(&lp->eth_regs->miimrdd)); + if (readl(&lp->eth_regs->miimind) & ETH_MII_IND_NV) + return -EINVAL; + + ret = readl(&lp->eth_regs->miimrdd); + writel(0, &lp->eth_regs->miimcmd); return ret; } -static void mdio_write(struct net_device *dev, int mii_id, int reg, int val) +static void korina_mdio_write(struct net_device *dev, int phy, int reg, int val) { struct korina_private *lp = netdev_priv(dev); - mii_id = ((lp->rx_irq == 0x2c ? 1 : 0) << 8); + if (korina_mdio_wait(lp)) + return; - writel(0, &lp->eth_regs->miimcfg); - writel(1, &lp->eth_regs->miimcmd); - writel(mii_id | reg, &lp->eth_regs->miimaddr); - writel(ETH_MII_CMD_SCN, &lp->eth_regs->miimcmd); + writel(0, &lp->eth_regs->miimcmd); + writel(phy << 8 | reg, &lp->eth_regs->miimaddr); writel(val, &lp->eth_regs->miimwtd); } @@ -353,12 +597,10 @@ static int korina_rx(struct net_device *dev, int limit) struct korina_private *lp = netdev_priv(dev); struct dma_desc *rd = &lp->rd_ring[lp->rx_next_done]; struct sk_buff *skb, *skb_new; - u8 *pkt_buf; u32 devcs, pkt_len, dmas; + dma_addr_t ca; int count; - dma_cache_inv((u32)rd, sizeof(*rd)); - for (count = 0; count < limit; count++) { skb = lp->rx_skb[lp->rx_next_done]; skb_new = NULL; @@ -392,20 +634,22 @@ static int korina_rx(struct net_device *dev, int limit) goto next; } - pkt_len = RCVPKT_LENGTH(devcs); - - /* must be the (first and) last - * descriptor then */ - pkt_buf = (u8 *)lp->rx_skb[lp->rx_next_done]->data; - - /* invalidate the cache */ - dma_cache_inv((unsigned long)pkt_buf, pkt_len - 4); - /* Malloc up new buffer. */ skb_new = netdev_alloc_skb_ip_align(dev, KORINA_RBSIZE); - if (!skb_new) break; + + ca = dma_map_single(lp->dmadev, skb_new->data, KORINA_RBSIZE, + DMA_FROM_DEVICE); + if (dma_mapping_error(lp->dmadev, ca)) { + dev_kfree_skb_any(skb_new); + break; + } + + pkt_len = RCVPKT_LENGTH(devcs); + dma_unmap_single(lp->dmadev, lp->rx_skb_dma[lp->rx_next_done], + pkt_len, DMA_FROM_DEVICE); + /* Do not count the CRC */ skb_put(skb, pkt_len - 4); skb->protocol = eth_type_trans(skb, dev); @@ -420,15 +664,13 @@ static int korina_rx(struct net_device *dev, int limit) dev->stats.multicast++; lp->rx_skb[lp->rx_next_done] = skb_new; + lp->rx_skb_dma[lp->rx_next_done] = ca; next: rd->devcs = 0; /* Restore descriptor's curr_addr */ - if (skb_new) - rd->ca = CPHYSADDR(skb_new->data); - else - rd->ca = CPHYSADDR(skb->data); + rd->ca = lp->rx_skb_dma[lp->rx_next_done]; rd->control = DMA_COUNT(KORINA_RBSIZE) | DMA_DESC_COD | DMA_DESC_IOD; @@ -437,23 +679,21 @@ next: ~DMA_DESC_COD; lp->rx_next_done = (lp->rx_next_done + 1) & KORINA_RDS_MASK; - dma_cache_wback((u32)rd, sizeof(*rd)); rd = &lp->rd_ring[lp->rx_next_done]; - writel(~DMA_STAT_DONE, &lp->rx_dma_regs->dmas); + writel((u32)~DMA_STAT_DONE, &lp->rx_dma_regs->dmas); } dmas = readl(&lp->rx_dma_regs->dmas); if (dmas & DMA_STAT_HALT) { - writel(~(DMA_STAT_HALT | DMA_STAT_ERR), - &lp->rx_dma_regs->dmas); + writel((u32)~(DMA_STAT_HALT | DMA_STAT_ERR), + &lp->rx_dma_regs->dmas); lp->dma_halt_cnt++; rd->devcs = 0; - skb = lp->rx_skb[lp->rx_next_done]; - rd->ca = CPHYSADDR(skb->data); - dma_cache_wback((u32)rd, sizeof(*rd)); - korina_chain_rx(lp, rd); + rd->ca = lp->rx_skb_dma[lp->rx_next_done]; + writel(korina_rx_dma(lp, rd - lp->rd_ring), + &lp->rx_dma_regs->dmandptr); } return count; @@ -576,6 +816,10 @@ static void korina_tx(struct net_device *dev) /* We must always free the original skb */ if (lp->tx_skb[lp->tx_next_done]) { + dma_unmap_single(lp->dmadev, + lp->tx_skb_dma[lp->tx_next_done], + lp->tx_skb[lp->tx_next_done]->len, + DMA_TO_DEVICE); dev_kfree_skb_any(lp->tx_skb[lp->tx_next_done]); lp->tx_skb[lp->tx_next_done] = NULL; } @@ -622,9 +866,9 @@ korina_tx_dma_interrupt(int irq, void *dev_id) if (lp->tx_chain_status == desc_filled && (readl(&(lp->tx_dma_regs->dmandptr)) == 0)) { - writel(CPHYSADDR(&lp->td_ring[lp->tx_chain_head]), - &(lp->tx_dma_regs->dmandptr)); - lp->tx_chain_status = desc_empty; + writel(korina_tx_dma(lp, lp->tx_chain_head), + &lp->tx_dma_regs->dmandptr); + lp->tx_chain_status = desc_is_empty; lp->tx_chain_head = lp->tx_chain_tail; netif_trans_update(dev); } @@ -643,7 +887,7 @@ static void korina_check_media(struct net_device *dev, unsigned int init_media) { struct korina_private *lp = netdev_priv(dev); - mii_check_media(&lp->mii_if, 0, init_media); + mii_check_media(&lp->mii_if, 1, init_media); if (lp->mii_if.full_duplex) writel(readl(&lp->eth_regs->ethmac2) | ETH_MAC2_FD, @@ -743,6 +987,7 @@ static int korina_alloc_ring(struct net_device *dev) { struct korina_private *lp = netdev_priv(dev); struct sk_buff *skb; + dma_addr_t ca; int i; /* Initialize the transmit descriptors */ @@ -754,7 +999,7 @@ static int korina_alloc_ring(struct net_device *dev) } lp->tx_next_done = lp->tx_chain_head = lp->tx_chain_tail = lp->tx_full = lp->tx_count = 0; - lp->tx_chain_status = desc_empty; + lp->tx_chain_status = desc_is_empty; /* Initialize the receive descriptors */ for (i = 0; i < KORINA_NUM_RDS; i++) { @@ -765,19 +1010,24 @@ static int korina_alloc_ring(struct net_device *dev) lp->rd_ring[i].control = DMA_DESC_IOD | DMA_COUNT(KORINA_RBSIZE); lp->rd_ring[i].devcs = 0; - lp->rd_ring[i].ca = CPHYSADDR(skb->data); - lp->rd_ring[i].link = CPHYSADDR(&lp->rd_ring[i+1]); + ca = dma_map_single(lp->dmadev, skb->data, KORINA_RBSIZE, + DMA_FROM_DEVICE); + if (dma_mapping_error(lp->dmadev, ca)) + return -ENOMEM; + lp->rd_ring[i].ca = ca; + lp->rx_skb_dma[i] = ca; + lp->rd_ring[i].link = korina_rx_dma(lp, i + 1); } /* loop back receive descriptors, so the last * descriptor points to the first one */ - lp->rd_ring[i - 1].link = CPHYSADDR(&lp->rd_ring[0]); + lp->rd_ring[i - 1].link = lp->rd_dma; lp->rd_ring[i - 1].control |= DMA_DESC_COD; lp->rx_next_done = 0; lp->rx_chain_head = 0; lp->rx_chain_tail = 0; - lp->rx_chain_status = desc_empty; + lp->rx_chain_status = desc_is_empty; return 0; } @@ -789,16 +1039,22 @@ static void korina_free_ring(struct net_device *dev) for (i = 0; i < KORINA_NUM_RDS; i++) { lp->rd_ring[i].control = 0; - if (lp->rx_skb[i]) + if (lp->rx_skb[i]) { + dma_unmap_single(lp->dmadev, lp->rx_skb_dma[i], + KORINA_RBSIZE, DMA_FROM_DEVICE); dev_kfree_skb_any(lp->rx_skb[i]); - lp->rx_skb[i] = NULL; + lp->rx_skb[i] = NULL; + } } for (i = 0; i < KORINA_NUM_TDS; i++) { lp->td_ring[i].control = 0; - if (lp->tx_skb[i]) + if (lp->tx_skb[i]) { + dma_unmap_single(lp->dmadev, lp->tx_skb_dma[i], + lp->tx_skb[i]->len, DMA_TO_DEVICE); dev_kfree_skb_any(lp->tx_skb[i]); - lp->tx_skb[i] = NULL; + lp->tx_skb[i] = NULL; + } } } @@ -830,7 +1086,8 @@ static int korina_init(struct net_device *dev) writel(0, &lp->rx_dma_regs->dmas); /* Start Rx DMA */ - korina_start_rx(lp, &lp->rd_ring[0]); + writel(0, &lp->rx_dma_regs->dmandptr); + writel(korina_rx_dma(lp, 0), &lp->rx_dma_regs->dmadptr); writel(readl(&lp->tx_dma_regs->dmasm) & ~(DMA_STAT_FINI | DMA_STAT_ERR), @@ -867,14 +1124,17 @@ static int korina_init(struct net_device *dev) /* Management Clock Prescaler Divisor * Clock independent setting */ - writel(((idt_cpu_freq) / MII_CLOCK + 1) & ~1, - &lp->eth_regs->ethmcp); + writel(((lp->mii_clock_freq) / MII_CLOCK + 1) & ~1, + &lp->eth_regs->ethmcp); + writel(0, &lp->eth_regs->miimcfg); /* don't transmit until fifo contains 48b */ writel(48, &lp->eth_regs->ethfifott); writel(ETH_MAC1_RE, &lp->eth_regs->ethmac1); + korina_check_media(dev, 1); + napi_enable(&lp->napi); netif_start_queue(dev); @@ -1022,86 +1282,94 @@ static const struct net_device_ops korina_netdev_ops = { static int korina_probe(struct platform_device *pdev) { - struct korina_device *bif = platform_get_drvdata(pdev); + u8 *mac_addr = dev_get_platdata(&pdev->dev); struct korina_private *lp; struct net_device *dev; - struct resource *r; + struct clk *clk; + void __iomem *p; int rc; - dev = alloc_etherdev(sizeof(struct korina_private)); + dev = devm_alloc_etherdev(&pdev->dev, sizeof(struct korina_private)); if (!dev) return -ENOMEM; SET_NETDEV_DEV(dev, &pdev->dev); lp = netdev_priv(dev); - bif->dev = dev; - memcpy(dev->dev_addr, bif->mac, ETH_ALEN); + if (mac_addr) + ether_addr_copy(dev->dev_addr, mac_addr); + else if (of_get_mac_address(pdev->dev.of_node, dev->dev_addr) < 0) + eth_hw_addr_random(dev); + + clk = devm_clk_get_optional(&pdev->dev, "mdioclk"); + if (IS_ERR(clk)) + return PTR_ERR(clk); + if (clk) { + clk_prepare_enable(clk); + lp->mii_clock_freq = clk_get_rate(clk); + } else { + lp->mii_clock_freq = 200000000; /* max possible input clk */ + } - lp->rx_irq = platform_get_irq_byname(pdev, "korina_rx"); - lp->tx_irq = platform_get_irq_byname(pdev, "korina_tx"); + lp->rx_irq = platform_get_irq_byname(pdev, "rx"); + lp->tx_irq = platform_get_irq_byname(pdev, "tx"); - r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "korina_regs"); - dev->base_addr = r->start; - lp->eth_regs = ioremap(r->start, resource_size(r)); - if (!lp->eth_regs) { + p = devm_platform_ioremap_resource_byname(pdev, "emac"); + if (!p) { printk(KERN_ERR DRV_NAME ": cannot remap registers\n"); - rc = -ENXIO; - goto probe_err_out; + return -ENOMEM; } + lp->eth_regs = p; - r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "korina_dma_rx"); - lp->rx_dma_regs = ioremap(r->start, resource_size(r)); - if (!lp->rx_dma_regs) { + p = devm_platform_ioremap_resource_byname(pdev, "dma_rx"); + if (!p) { printk(KERN_ERR DRV_NAME ": cannot remap Rx DMA registers\n"); - rc = -ENXIO; - goto probe_err_dma_rx; + return -ENOMEM; } + lp->rx_dma_regs = p; - r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "korina_dma_tx"); - lp->tx_dma_regs = ioremap(r->start, resource_size(r)); - if (!lp->tx_dma_regs) { + p = devm_platform_ioremap_resource_byname(pdev, "dma_tx"); + if (!p) { printk(KERN_ERR DRV_NAME ": cannot remap Tx DMA registers\n"); - rc = -ENXIO; - goto probe_err_dma_tx; - } - - lp->td_ring = kmalloc(TD_RING_SIZE + RD_RING_SIZE, GFP_KERNEL); - if (!lp->td_ring) { - rc = -ENXIO; - goto probe_err_td_ring; + return -ENOMEM; } + lp->tx_dma_regs = p; - dma_cache_inv((unsigned long)(lp->td_ring), - TD_RING_SIZE + RD_RING_SIZE); + lp->td_ring = dmam_alloc_coherent(&pdev->dev, TD_RING_SIZE, + &lp->td_dma, GFP_KERNEL); + if (!lp->td_ring) + return -ENOMEM; - /* now convert TD_RING pointer to KSEG1 */ - lp->td_ring = (struct dma_desc *)KSEG1ADDR(lp->td_ring); - lp->rd_ring = &lp->td_ring[KORINA_NUM_TDS]; + lp->rd_ring = dmam_alloc_coherent(&pdev->dev, RD_RING_SIZE, + &lp->rd_dma, GFP_KERNEL); + if (!lp->rd_ring) + return -ENOMEM; spin_lock_init(&lp->lock); /* just use the rx dma irq */ dev->irq = lp->rx_irq; lp->dev = dev; + lp->dmadev = &pdev->dev; dev->netdev_ops = &korina_netdev_ops; dev->ethtool_ops = &netdev_ethtool_ops; dev->watchdog_timeo = TX_TIMEOUT; netif_napi_add(dev, &lp->napi, korina_poll, NAPI_POLL_WEIGHT); - lp->phy_addr = (((lp->rx_irq == 0x2c? 1:0) << 8) | 0x05); lp->mii_if.dev = dev; - lp->mii_if.mdio_read = mdio_read; - lp->mii_if.mdio_write = mdio_write; - lp->mii_if.phy_id = lp->phy_addr; + lp->mii_if.mdio_read = korina_mdio_read; + lp->mii_if.mdio_write = korina_mdio_write; + lp->mii_if.phy_id = 1; lp->mii_if.phy_id_mask = 0x1f; lp->mii_if.reg_num_mask = 0x1f; + platform_set_drvdata(pdev, dev); + rc = register_netdev(dev); if (rc < 0) { printk(KERN_ERR DRV_NAME ": cannot register net device: %d\n", rc); - goto probe_err_register; + return rc; } timer_setup(&lp->media_check_timer, korina_poll_media, 0); @@ -1109,40 +1377,33 @@ static int korina_probe(struct platform_device *pdev) printk(KERN_INFO "%s: " DRV_NAME "-" DRV_VERSION " " DRV_RELDATE "\n", dev->name); -out: return rc; - -probe_err_register: - kfree((struct dma_desc *)KSEG0ADDR(lp->td_ring)); -probe_err_td_ring: - iounmap(lp->tx_dma_regs); -probe_err_dma_tx: - iounmap(lp->rx_dma_regs); -probe_err_dma_rx: - iounmap(lp->eth_regs); -probe_err_out: - free_netdev(dev); - goto out; } static int korina_remove(struct platform_device *pdev) { - struct korina_device *bif = platform_get_drvdata(pdev); - struct korina_private *lp = netdev_priv(bif->dev); - - iounmap(lp->eth_regs); - iounmap(lp->rx_dma_regs); - iounmap(lp->tx_dma_regs); - kfree((struct dma_desc *)KSEG0ADDR(lp->td_ring)); + struct net_device *dev = platform_get_drvdata(pdev); - unregister_netdev(bif->dev); - free_netdev(bif->dev); + unregister_netdev(dev); return 0; } +#ifdef CONFIG_OF +static const struct of_device_id korina_match[] = { + { + .compatible = "idt,3243x-emac", + }, + { } +}; +MODULE_DEVICE_TABLE(of, korina_match); +#endif + static struct platform_driver korina_driver = { - .driver.name = "korina", + .driver = { + .name = "korina", + .of_match_table = of_match_ptr(korina_match), + }, .probe = korina_probe, .remove = korina_remove, }; |