diff options
author | 2023-02-21 18:24:12 -0800 | |
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committer | 2023-02-21 18:24:12 -0800 | |
commit | 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 (patch) | |
tree | cc5c2d0a898769fd59549594fedb3ee6f84e59a0 /drivers/fpga/machxo2-spi.c | |
download | linux-5b7c4cabbb65f5c469464da6c5f614cbd7f730f2.tar.gz linux-5b7c4cabbb65f5c469464da6c5f614cbd7f730f2.zip |
Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted
Pull networking updates from Jakub Kicinski:
"Core:
- Add dedicated kmem_cache for typical/small skb->head, avoid having
to access struct page at kfree time, and improve memory use.
- Introduce sysctl to set default RPS configuration for new netdevs.
- Define Netlink protocol specification format which can be used to
describe messages used by each family and auto-generate parsers.
Add tools for generating kernel data structures and uAPI headers.
- Expose all net/core sysctls inside netns.
- Remove 4s sleep in netpoll if carrier is instantly detected on
boot.
- Add configurable limit of MDB entries per port, and port-vlan.
- Continue populating drop reasons throughout the stack.
- Retire a handful of legacy Qdiscs and classifiers.
Protocols:
- Support IPv4 big TCP (TSO frames larger than 64kB).
- Add IP_LOCAL_PORT_RANGE socket option, to control local port range
on socket by socket basis.
- Track and report in procfs number of MPTCP sockets used.
- Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
manager.
- IPv6: don't check net.ipv6.route.max_size and rely on garbage
collection to free memory (similarly to IPv4).
- Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).
- ICMP: add per-rate limit counters.
- Add support for user scanning requests in ieee802154.
- Remove static WEP support.
- Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
reporting.
- WiFi 7 EHT channel puncturing support (client & AP).
BPF:
- Add a rbtree data structure following the "next-gen data structure"
precedent set by recently added linked list, that is, by using
kfunc + kptr instead of adding a new BPF map type.
- Expose XDP hints via kfuncs with initial support for RX hash and
timestamp metadata.
- Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
better support decap on GRE tunnel devices not operating in collect
metadata.
- Improve x86 JIT's codegen for PROBE_MEM runtime error checks.
- Remove the need for trace_printk_lock for bpf_trace_printk and
bpf_trace_vprintk helpers.
- Extend libbpf's bpf_tracing.h support for tracing arguments of
kprobes/uprobes and syscall as a special case.
- Significantly reduce the search time for module symbols by
livepatch and BPF.
- Enable cpumasks to be used as kptrs, which is useful for tracing
programs tracking which tasks end up running on which CPUs in
different time intervals.
- Add support for BPF trampoline on s390x and riscv64.
- Add capability to export the XDP features supported by the NIC.
- Add __bpf_kfunc tag for marking kernel functions as kfuncs.
- Add cgroup.memory=nobpf kernel parameter option to disable BPF
memory accounting for container environments.
Netfilter:
- Remove the CLUSTERIP target. It has been marked as obsolete for
years, and we still have WARN splats wrt races of the out-of-band
/proc interface installed by this target.
- Add 'destroy' commands to nf_tables. They are identical to the
existing 'delete' commands, but do not return an error if the
referenced object (set, chain, rule...) did not exist.
Driver API:
- Improve cpumask_local_spread() locality to help NICs set the right
IRQ affinity on AMD platforms.
- Separate C22 and C45 MDIO bus transactions more clearly.
- Introduce new DCB table to control DSCP rewrite on egress.
- Support configuration of Physical Layer Collision Avoidance (PLCA)
Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
shared medium Ethernet.
- Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
preemption of low priority frames by high priority frames.
- Add support for controlling MACSec offload using netlink SET.
- Rework devlink instance refcounts to allow registration and
de-registration under the instance lock. Split the code into
multiple files, drop some of the unnecessarily granular locks and
factor out common parts of netlink operation handling.
- Add TX frame aggregation parameters (for USB drivers).
- Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
messages with notifications for debug.
- Allow offloading of UDP NEW connections via act_ct.
- Add support for per action HW stats in TC.
- Support hardware miss to TC action (continue processing in SW from
a specific point in the action chain).
- Warn if old Wireless Extension user space interface is used with
modern cfg80211/mac80211 drivers. Do not support Wireless
Extensions for Wi-Fi 7 devices at all. Everyone should switch to
using nl80211 interface instead.
- Improve the CAN bit timing configuration. Use extack to return
error messages directly to user space, update the SJW handling,
including the definition of a new default value that will benefit
CAN-FD controllers, by increasing their oscillator tolerance.
New hardware / drivers:
- Ethernet:
- nVidia BlueField-3 support (control traffic driver)
- Ethernet support for imx93 SoCs
- Motorcomm yt8531 gigabit Ethernet PHY
- onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
- Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
- Amlogic gxl MDIO mux
- WiFi:
- RealTek RTL8188EU (rtl8xxxu)
- Qualcomm Wi-Fi 7 devices (ath12k)
- CAN:
- Renesas R-Car V4H
Drivers:
- Bluetooth:
- Set Per Platform Antenna Gain (PPAG) for Intel controllers.
- Ethernet NICs:
- Intel (1G, igc):
- support TSN / Qbv / packet scheduling features of i226 model
- Intel (100G, ice):
- use GNSS subsystem instead of TTY
- multi-buffer XDP support
- extend support for GPIO pins to E823 devices
- nVidia/Mellanox:
- update the shared buffer configuration on PFC commands
- implement PTP adjphase function for HW offset control
- TC support for Geneve and GRE with VF tunnel offload
- more efficient crypto key management method
- multi-port eswitch support
- Netronome/Corigine:
- add DCB IEEE support
- support IPsec offloading for NFP3800
- Freescale/NXP (enetc):
- support XDP_REDIRECT for XDP non-linear buffers
- improve reconfig, avoid link flap and waiting for idle
- support MAC Merge layer
- Other NICs:
- sfc/ef100: add basic devlink support for ef100
- ionic: rx_push mode operation (writing descriptors via MMIO)
- bnxt: use the auxiliary bus abstraction for RDMA
- r8169: disable ASPM and reset bus in case of tx timeout
- cpsw: support QSGMII mode for J721e CPSW9G
- cpts: support pulse-per-second output
- ngbe: add an mdio bus driver
- usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
- r8152: handle devices with FW with NCM support
- amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
- virtio-net: support multi buffer XDP
- virtio/vsock: replace virtio_vsock_pkt with sk_buff
- tsnep: XDP support
- Ethernet high-speed switches:
- nVidia/Mellanox (mlxsw):
- add support for latency TLV (in FW control messages)
- Microchip (sparx5):
- separate explicit and implicit traffic forwarding rules, make
the implicit rules always active
- add support for egress DSCP rewrite
- IS0 VCAP support (Ingress Classification)
- IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
etc.)
- ES2 VCAP support (Egress Access Control)
- support for Per-Stream Filtering and Policing (802.1Q,
8.6.5.1)
- Ethernet embedded switches:
- Marvell (mv88e6xxx):
- add MAB (port auth) offload support
- enable PTP receive for mv88e6390
- NXP (ocelot):
- support MAC Merge layer
- support for the the vsc7512 internal copper phys
- Microchip:
- lan9303: convert to PHYLINK
- lan966x: support TC flower filter statistics
- lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
- lan937x: support Credit Based Shaper configuration
- ksz9477: support Energy Efficient Ethernet
- other:
- qca8k: convert to regmap read/write API, use bulk operations
- rswitch: Improve TX timestamp accuracy
- Intel WiFi (iwlwifi):
- EHT (Wi-Fi 7) rate reporting
- STEP equalizer support: transfer some STEP (connection to radio
on platforms with integrated wifi) related parameters from the
BIOS to the firmware.
- Qualcomm 802.11ax WiFi (ath11k):
- IPQ5018 support
- Fine Timing Measurement (FTM) responder role support
- channel 177 support
- MediaTek WiFi (mt76):
- per-PHY LED support
- mt7996: EHT (Wi-Fi 7) support
- Wireless Ethernet Dispatch (WED) reset support
- switch to using page pool allocator
- RealTek WiFi (rtw89):
- support new version of Bluetooth co-existance
- Mobile:
- rmnet: support TX aggregation"
* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
page_pool: add a comment explaining the fragment counter usage
net: ethtool: fix __ethtool_dev_mm_supported() implementation
ethtool: pse-pd: Fix double word in comments
xsk: add linux/vmalloc.h to xsk.c
sefltests: netdevsim: wait for devlink instance after netns removal
selftest: fib_tests: Always cleanup before exit
net/mlx5e: Align IPsec ASO result memory to be as required by hardware
net/mlx5e: TC, Set CT miss to the specific ct action instance
net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
net/mlx5: Refactor tc miss handling to a single function
net/mlx5: Kconfig: Make tc offload depend on tc skb extension
net/sched: flower: Support hardware miss to tc action
net/sched: flower: Move filter handle initialization earlier
net/sched: cls_api: Support hardware miss to tc action
net/sched: Rename user cookie and act cookie
sfc: fix builds without CONFIG_RTC_LIB
sfc: clean up some inconsistent indentings
net/mlx4_en: Introduce flexible array to silence overflow warning
net: lan966x: Fix possible deadlock inside PTP
net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
...
Diffstat (limited to 'drivers/fpga/machxo2-spi.c')
-rw-r--r-- | drivers/fpga/machxo2-spi.c | 405 |
1 files changed, 405 insertions, 0 deletions
diff --git a/drivers/fpga/machxo2-spi.c b/drivers/fpga/machxo2-spi.c new file mode 100644 index 000000000..905607992 --- /dev/null +++ b/drivers/fpga/machxo2-spi.c @@ -0,0 +1,405 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Lattice MachXO2 Slave SPI Driver + * + * Manage Lattice FPGA firmware that is loaded over SPI using + * the slave serial configuration interface. + * + * Copyright (C) 2018 Paolo Pisati <p.pisati@gmail.com> + */ + +#include <linux/delay.h> +#include <linux/fpga/fpga-mgr.h> +#include <linux/gpio/consumer.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/spi/spi.h> + +/* MachXO2 Programming Guide - sysCONFIG Programming Commands */ +#define IDCODE_PUB {0xe0, 0x00, 0x00, 0x00} +#define ISC_ENABLE {0xc6, 0x08, 0x00, 0x00} +#define ISC_ERASE {0x0e, 0x04, 0x00, 0x00} +#define ISC_PROGRAMDONE {0x5e, 0x00, 0x00, 0x00} +#define LSC_INITADDRESS {0x46, 0x00, 0x00, 0x00} +#define LSC_PROGINCRNV {0x70, 0x00, 0x00, 0x01} +#define LSC_READ_STATUS {0x3c, 0x00, 0x00, 0x00} +#define LSC_REFRESH {0x79, 0x00, 0x00, 0x00} + +/* + * Max CCLK in Slave SPI mode according to 'MachXO2 Family Data + * Sheet' sysCONFIG Port Timing Specifications (3-36) + */ +#define MACHXO2_MAX_SPEED 66000000 + +#define MACHXO2_LOW_DELAY_USEC 5 +#define MACHXO2_HIGH_DELAY_USEC 200 +#define MACHXO2_REFRESH_USEC 4800 +#define MACHXO2_MAX_BUSY_LOOP 128 +#define MACHXO2_MAX_REFRESH_LOOP 16 + +#define MACHXO2_PAGE_SIZE 16 +#define MACHXO2_BUF_SIZE (MACHXO2_PAGE_SIZE + 4) + +/* Status register bits, errors and error mask */ +#define BUSY 12 +#define DONE 8 +#define DVER 27 +#define ENAB 9 +#define ERRBITS 23 +#define ERRMASK 7 +#define FAIL 13 + +#define ENOERR 0 /* no error */ +#define EID 1 +#define ECMD 2 +#define ECRC 3 +#define EPREAM 4 /* preamble error */ +#define EABRT 5 /* abort error */ +#define EOVERFL 6 /* overflow error */ +#define ESDMEOF 7 /* SDM EOF */ + +static inline u8 get_err(unsigned long *status) +{ + return (*status >> ERRBITS) & ERRMASK; +} + +static int get_status(struct spi_device *spi, unsigned long *status) +{ + struct spi_message msg; + struct spi_transfer rx, tx; + static const u8 cmd[] = LSC_READ_STATUS; + int ret; + + memset(&rx, 0, sizeof(rx)); + memset(&tx, 0, sizeof(tx)); + tx.tx_buf = cmd; + tx.len = sizeof(cmd); + rx.rx_buf = status; + rx.len = 4; + spi_message_init(&msg); + spi_message_add_tail(&tx, &msg); + spi_message_add_tail(&rx, &msg); + ret = spi_sync(spi, &msg); + if (ret) + return ret; + + *status = be32_to_cpu(*status); + + return 0; +} + +#ifdef DEBUG +static const char *get_err_string(u8 err) +{ + switch (err) { + case ENOERR: return "No Error"; + case EID: return "ID ERR"; + case ECMD: return "CMD ERR"; + case ECRC: return "CRC ERR"; + case EPREAM: return "Preamble ERR"; + case EABRT: return "Abort ERR"; + case EOVERFL: return "Overflow ERR"; + case ESDMEOF: return "SDM EOF"; + } + + return "Default switch case"; +} +#endif + +static void dump_status_reg(unsigned long *status) +{ +#ifdef DEBUG + pr_debug("machxo2 status: 0x%08lX - done=%d, cfgena=%d, busy=%d, fail=%d, devver=%d, err=%s\n", + *status, test_bit(DONE, status), test_bit(ENAB, status), + test_bit(BUSY, status), test_bit(FAIL, status), + test_bit(DVER, status), get_err_string(get_err(status))); +#endif +} + +static int wait_until_not_busy(struct spi_device *spi) +{ + unsigned long status; + int ret, loop = 0; + + do { + ret = get_status(spi, &status); + if (ret) + return ret; + if (++loop >= MACHXO2_MAX_BUSY_LOOP) + return -EBUSY; + } while (test_bit(BUSY, &status)); + + return 0; +} + +static int machxo2_cleanup(struct fpga_manager *mgr) +{ + struct spi_device *spi = mgr->priv; + struct spi_message msg; + struct spi_transfer tx[2]; + static const u8 erase[] = ISC_ERASE; + static const u8 refresh[] = LSC_REFRESH; + int ret; + + memset(tx, 0, sizeof(tx)); + spi_message_init(&msg); + tx[0].tx_buf = &erase; + tx[0].len = sizeof(erase); + spi_message_add_tail(&tx[0], &msg); + ret = spi_sync(spi, &msg); + if (ret) + goto fail; + + ret = wait_until_not_busy(spi); + if (ret) + goto fail; + + spi_message_init(&msg); + tx[1].tx_buf = &refresh; + tx[1].len = sizeof(refresh); + tx[1].delay.value = MACHXO2_REFRESH_USEC; + tx[1].delay.unit = SPI_DELAY_UNIT_USECS; + spi_message_add_tail(&tx[1], &msg); + ret = spi_sync(spi, &msg); + if (ret) + goto fail; + + return 0; +fail: + dev_err(&mgr->dev, "Cleanup failed\n"); + + return ret; +} + +static enum fpga_mgr_states machxo2_spi_state(struct fpga_manager *mgr) +{ + struct spi_device *spi = mgr->priv; + unsigned long status; + + get_status(spi, &status); + if (!test_bit(BUSY, &status) && test_bit(DONE, &status) && + get_err(&status) == ENOERR) + return FPGA_MGR_STATE_OPERATING; + + return FPGA_MGR_STATE_UNKNOWN; +} + +static int machxo2_write_init(struct fpga_manager *mgr, + struct fpga_image_info *info, + const char *buf, size_t count) +{ + struct spi_device *spi = mgr->priv; + struct spi_message msg; + struct spi_transfer tx[3]; + static const u8 enable[] = ISC_ENABLE; + static const u8 erase[] = ISC_ERASE; + static const u8 initaddr[] = LSC_INITADDRESS; + unsigned long status; + int ret; + + if ((info->flags & FPGA_MGR_PARTIAL_RECONFIG)) { + dev_err(&mgr->dev, + "Partial reconfiguration is not supported\n"); + return -ENOTSUPP; + } + + get_status(spi, &status); + dump_status_reg(&status); + memset(tx, 0, sizeof(tx)); + spi_message_init(&msg); + tx[0].tx_buf = &enable; + tx[0].len = sizeof(enable); + tx[0].delay.value = MACHXO2_LOW_DELAY_USEC; + tx[0].delay.unit = SPI_DELAY_UNIT_USECS; + spi_message_add_tail(&tx[0], &msg); + + tx[1].tx_buf = &erase; + tx[1].len = sizeof(erase); + spi_message_add_tail(&tx[1], &msg); + ret = spi_sync(spi, &msg); + if (ret) + goto fail; + + ret = wait_until_not_busy(spi); + if (ret) + goto fail; + + get_status(spi, &status); + if (test_bit(FAIL, &status)) { + ret = -EINVAL; + goto fail; + } + dump_status_reg(&status); + + spi_message_init(&msg); + tx[2].tx_buf = &initaddr; + tx[2].len = sizeof(initaddr); + spi_message_add_tail(&tx[2], &msg); + ret = spi_sync(spi, &msg); + if (ret) + goto fail; + + get_status(spi, &status); + dump_status_reg(&status); + + return 0; +fail: + dev_err(&mgr->dev, "Error during FPGA init.\n"); + + return ret; +} + +static int machxo2_write(struct fpga_manager *mgr, const char *buf, + size_t count) +{ + struct spi_device *spi = mgr->priv; + struct spi_message msg; + struct spi_transfer tx; + static const u8 progincr[] = LSC_PROGINCRNV; + u8 payload[MACHXO2_BUF_SIZE]; + unsigned long status; + int i, ret; + + if (count % MACHXO2_PAGE_SIZE != 0) { + dev_err(&mgr->dev, "Malformed payload.\n"); + return -EINVAL; + } + get_status(spi, &status); + dump_status_reg(&status); + memcpy(payload, &progincr, sizeof(progincr)); + for (i = 0; i < count; i += MACHXO2_PAGE_SIZE) { + memcpy(&payload[sizeof(progincr)], &buf[i], MACHXO2_PAGE_SIZE); + memset(&tx, 0, sizeof(tx)); + spi_message_init(&msg); + tx.tx_buf = payload; + tx.len = MACHXO2_BUF_SIZE; + tx.delay.value = MACHXO2_HIGH_DELAY_USEC; + tx.delay.unit = SPI_DELAY_UNIT_USECS; + spi_message_add_tail(&tx, &msg); + ret = spi_sync(spi, &msg); + if (ret) { + dev_err(&mgr->dev, "Error loading the bitstream.\n"); + return ret; + } + } + get_status(spi, &status); + dump_status_reg(&status); + + return 0; +} + +static int machxo2_write_complete(struct fpga_manager *mgr, + struct fpga_image_info *info) +{ + struct spi_device *spi = mgr->priv; + struct spi_message msg; + struct spi_transfer tx[2]; + static const u8 progdone[] = ISC_PROGRAMDONE; + static const u8 refresh[] = LSC_REFRESH; + unsigned long status; + int ret, refreshloop = 0; + + memset(tx, 0, sizeof(tx)); + spi_message_init(&msg); + tx[0].tx_buf = &progdone; + tx[0].len = sizeof(progdone); + spi_message_add_tail(&tx[0], &msg); + ret = spi_sync(spi, &msg); + if (ret) + goto fail; + ret = wait_until_not_busy(spi); + if (ret) + goto fail; + + get_status(spi, &status); + dump_status_reg(&status); + if (!test_bit(DONE, &status)) { + machxo2_cleanup(mgr); + ret = -EINVAL; + goto fail; + } + + do { + spi_message_init(&msg); + tx[1].tx_buf = &refresh; + tx[1].len = sizeof(refresh); + tx[1].delay.value = MACHXO2_REFRESH_USEC; + tx[1].delay.unit = SPI_DELAY_UNIT_USECS; + spi_message_add_tail(&tx[1], &msg); + ret = spi_sync(spi, &msg); + if (ret) + goto fail; + + /* check refresh status */ + get_status(spi, &status); + dump_status_reg(&status); + if (!test_bit(BUSY, &status) && test_bit(DONE, &status) && + get_err(&status) == ENOERR) + break; + if (++refreshloop == MACHXO2_MAX_REFRESH_LOOP) { + machxo2_cleanup(mgr); + ret = -EINVAL; + goto fail; + } + } while (1); + + get_status(spi, &status); + dump_status_reg(&status); + + return 0; +fail: + dev_err(&mgr->dev, "Refresh failed.\n"); + + return ret; +} + +static const struct fpga_manager_ops machxo2_ops = { + .state = machxo2_spi_state, + .write_init = machxo2_write_init, + .write = machxo2_write, + .write_complete = machxo2_write_complete, +}; + +static int machxo2_spi_probe(struct spi_device *spi) +{ + struct device *dev = &spi->dev; + struct fpga_manager *mgr; + + if (spi->max_speed_hz > MACHXO2_MAX_SPEED) { + dev_err(dev, "Speed is too high\n"); + return -EINVAL; + } + + mgr = devm_fpga_mgr_register(dev, "Lattice MachXO2 SPI FPGA Manager", + &machxo2_ops, spi); + return PTR_ERR_OR_ZERO(mgr); +} + +#ifdef CONFIG_OF +static const struct of_device_id of_match[] = { + { .compatible = "lattice,machxo2-slave-spi", }, + {} +}; +MODULE_DEVICE_TABLE(of, of_match); +#endif + +static const struct spi_device_id lattice_ids[] = { + { "machxo2-slave-spi", 0 }, + { }, +}; +MODULE_DEVICE_TABLE(spi, lattice_ids); + +static struct spi_driver machxo2_spi_driver = { + .driver = { + .name = "machxo2-slave-spi", + .of_match_table = of_match_ptr(of_match), + }, + .probe = machxo2_spi_probe, + .id_table = lattice_ids, +}; + +module_spi_driver(machxo2_spi_driver) + +MODULE_AUTHOR("Paolo Pisati <p.pisati@gmail.com>"); +MODULE_DESCRIPTION("Load Lattice FPGA firmware over SPI"); +MODULE_LICENSE("GPL v2"); |