From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 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(). ... --- drivers/crypto/bcm/util.c | 530 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 530 insertions(+) create mode 100644 drivers/crypto/bcm/util.c (limited to 'drivers/crypto/bcm/util.c') diff --git a/drivers/crypto/bcm/util.c b/drivers/crypto/bcm/util.c new file mode 100644 index 000000000..d5d9cabea --- /dev/null +++ b/drivers/crypto/bcm/util.c @@ -0,0 +1,530 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright 2016 Broadcom + */ + +#include + +#include "cipher.h" +#include "util.h" + +/* offset of SPU_OFIFO_CTRL register */ +#define SPU_OFIFO_CTRL 0x40 +#define SPU_FIFO_WATERMARK 0x1FF + +/** + * spu_sg_at_offset() - Find the scatterlist entry at a given distance from the + * start of a scatterlist. + * @sg: [in] Start of a scatterlist + * @skip: [in] Distance from the start of the scatterlist, in bytes + * @sge: [out] Scatterlist entry at skip bytes from start + * @sge_offset: [out] Number of bytes from start of sge buffer to get to + * requested distance. + * + * Return: 0 if entry found at requested distance + * < 0 otherwise + */ +int spu_sg_at_offset(struct scatterlist *sg, unsigned int skip, + struct scatterlist **sge, unsigned int *sge_offset) +{ + /* byte index from start of sg to the end of the previous entry */ + unsigned int index = 0; + /* byte index from start of sg to the end of the current entry */ + unsigned int next_index; + + next_index = sg->length; + while (next_index <= skip) { + sg = sg_next(sg); + index = next_index; + if (!sg) + return -EINVAL; + next_index += sg->length; + } + + *sge_offset = skip - index; + *sge = sg; + return 0; +} + +/* Copy len bytes of sg data, starting at offset skip, to a dest buffer */ +void sg_copy_part_to_buf(struct scatterlist *src, u8 *dest, + unsigned int len, unsigned int skip) +{ + size_t copied; + unsigned int nents = sg_nents(src); + + copied = sg_pcopy_to_buffer(src, nents, dest, len, skip); + if (copied != len) { + flow_log("%s copied %u bytes of %u requested. ", + __func__, (u32)copied, len); + flow_log("sg with %u entries and skip %u\n", nents, skip); + } +} + +/* + * Copy data into a scatterlist starting at a specified offset in the + * scatterlist. Specifically, copy len bytes of data in the buffer src + * into the scatterlist dest, starting skip bytes into the scatterlist. + */ +void sg_copy_part_from_buf(struct scatterlist *dest, u8 *src, + unsigned int len, unsigned int skip) +{ + size_t copied; + unsigned int nents = sg_nents(dest); + + copied = sg_pcopy_from_buffer(dest, nents, src, len, skip); + if (copied != len) { + flow_log("%s copied %u bytes of %u requested. ", + __func__, (u32)copied, len); + flow_log("sg with %u entries and skip %u\n", nents, skip); + } +} + +/** + * spu_sg_count() - Determine number of elements in scatterlist to provide a + * specified number of bytes. + * @sg_list: scatterlist to examine + * @skip: index of starting point + * @nbytes: consider elements of scatterlist until reaching this number of + * bytes + * + * Return: the number of sg entries contributing to nbytes of data + */ +int spu_sg_count(struct scatterlist *sg_list, unsigned int skip, int nbytes) +{ + struct scatterlist *sg; + int sg_nents = 0; + unsigned int offset; + + if (!sg_list) + return 0; + + if (spu_sg_at_offset(sg_list, skip, &sg, &offset) < 0) + return 0; + + while (sg && (nbytes > 0)) { + sg_nents++; + nbytes -= (sg->length - offset); + offset = 0; + sg = sg_next(sg); + } + return sg_nents; +} + +/** + * spu_msg_sg_add() - Copy scatterlist entries from one sg to another, up to a + * given length. + * @to_sg: scatterlist to copy to + * @from_sg: scatterlist to copy from + * @from_skip: number of bytes to skip in from_sg. Non-zero when previous + * request included part of the buffer in entry in from_sg. + * Assumes from_skip < from_sg->length. + * @from_nents: number of entries in from_sg + * @length: number of bytes to copy. may reach this limit before exhausting + * from_sg. + * + * Copies the entries themselves, not the data in the entries. Assumes to_sg has + * enough entries. Does not limit the size of an individual buffer in to_sg. + * + * to_sg, from_sg, skip are all updated to end of copy + * + * Return: Number of bytes copied + */ +u32 spu_msg_sg_add(struct scatterlist **to_sg, + struct scatterlist **from_sg, u32 *from_skip, + u8 from_nents, u32 length) +{ + struct scatterlist *sg; /* an entry in from_sg */ + struct scatterlist *to = *to_sg; + struct scatterlist *from = *from_sg; + u32 skip = *from_skip; + u32 offset; + int i; + u32 entry_len = 0; + u32 frag_len = 0; /* length of entry added to to_sg */ + u32 copied = 0; /* number of bytes copied so far */ + + if (length == 0) + return 0; + + for_each_sg(from, sg, from_nents, i) { + /* number of bytes in this from entry not yet used */ + entry_len = sg->length - skip; + frag_len = min(entry_len, length - copied); + offset = sg->offset + skip; + if (frag_len) + sg_set_page(to++, sg_page(sg), frag_len, offset); + copied += frag_len; + if (copied == entry_len) { + /* used up all of from entry */ + skip = 0; /* start at beginning of next entry */ + } + if (copied == length) + break; + } + *to_sg = to; + *from_sg = sg; + if (frag_len < entry_len) + *from_skip = skip + frag_len; + else + *from_skip = 0; + + return copied; +} + +void add_to_ctr(u8 *ctr_pos, unsigned int increment) +{ + __be64 *high_be = (__be64 *)ctr_pos; + __be64 *low_be = high_be + 1; + u64 orig_low = __be64_to_cpu(*low_be); + u64 new_low = orig_low + (u64)increment; + + *low_be = __cpu_to_be64(new_low); + if (new_low < orig_low) + /* there was a carry from the low 8 bytes */ + *high_be = __cpu_to_be64(__be64_to_cpu(*high_be) + 1); +} + +struct sdesc { + struct shash_desc shash; + char ctx[]; +}; + +/** + * do_shash() - Do a synchronous hash operation in software + * @name: The name of the hash algorithm + * @result: Buffer where digest is to be written + * @data1: First part of data to hash. May be NULL. + * @data1_len: Length of data1, in bytes + * @data2: Second part of data to hash. May be NULL. + * @data2_len: Length of data2, in bytes + * @key: Key (if keyed hash) + * @key_len: Length of key, in bytes (or 0 if non-keyed hash) + * + * Note that the crypto API will not select this driver's own transform because + * this driver only registers asynchronous algos. + * + * Return: 0 if hash successfully stored in result + * < 0 otherwise + */ +int do_shash(unsigned char *name, unsigned char *result, + const u8 *data1, unsigned int data1_len, + const u8 *data2, unsigned int data2_len, + const u8 *key, unsigned int key_len) +{ + int rc; + unsigned int size; + struct crypto_shash *hash; + struct sdesc *sdesc; + + hash = crypto_alloc_shash(name, 0, 0); + if (IS_ERR(hash)) { + rc = PTR_ERR(hash); + pr_err("%s: Crypto %s allocation error %d\n", __func__, name, rc); + return rc; + } + + size = sizeof(struct shash_desc) + crypto_shash_descsize(hash); + sdesc = kmalloc(size, GFP_KERNEL); + if (!sdesc) { + rc = -ENOMEM; + goto do_shash_err; + } + sdesc->shash.tfm = hash; + + if (key_len > 0) { + rc = crypto_shash_setkey(hash, key, key_len); + if (rc) { + pr_err("%s: Could not setkey %s shash\n", __func__, name); + goto do_shash_err; + } + } + + rc = crypto_shash_init(&sdesc->shash); + if (rc) { + pr_err("%s: Could not init %s shash\n", __func__, name); + goto do_shash_err; + } + rc = crypto_shash_update(&sdesc->shash, data1, data1_len); + if (rc) { + pr_err("%s: Could not update1\n", __func__); + goto do_shash_err; + } + if (data2 && data2_len) { + rc = crypto_shash_update(&sdesc->shash, data2, data2_len); + if (rc) { + pr_err("%s: Could not update2\n", __func__); + goto do_shash_err; + } + } + rc = crypto_shash_final(&sdesc->shash, result); + if (rc) + pr_err("%s: Could not generate %s hash\n", __func__, name); + +do_shash_err: + crypto_free_shash(hash); + kfree(sdesc); + + return rc; +} + +#ifdef DEBUG +/* Dump len bytes of a scatterlist starting at skip bytes into the sg */ +void __dump_sg(struct scatterlist *sg, unsigned int skip, unsigned int len) +{ + u8 dbuf[16]; + unsigned int idx = skip; + unsigned int num_out = 0; /* number of bytes dumped so far */ + unsigned int count; + + if (packet_debug_logging) { + while (num_out < len) { + count = (len - num_out > 16) ? 16 : len - num_out; + sg_copy_part_to_buf(sg, dbuf, count, idx); + num_out += count; + print_hex_dump(KERN_ALERT, " sg: ", DUMP_PREFIX_NONE, + 4, 1, dbuf, count, false); + idx += 16; + } + } + if (debug_logging_sleep) + msleep(debug_logging_sleep); +} +#endif + +/* Returns the name for a given cipher alg/mode */ +char *spu_alg_name(enum spu_cipher_alg alg, enum spu_cipher_mode mode) +{ + switch (alg) { + case CIPHER_ALG_RC4: + return "rc4"; + case CIPHER_ALG_AES: + switch (mode) { + case CIPHER_MODE_CBC: + return "cbc(aes)"; + case CIPHER_MODE_ECB: + return "ecb(aes)"; + case CIPHER_MODE_OFB: + return "ofb(aes)"; + case CIPHER_MODE_CFB: + return "cfb(aes)"; + case CIPHER_MODE_CTR: + return "ctr(aes)"; + case CIPHER_MODE_XTS: + return "xts(aes)"; + case CIPHER_MODE_GCM: + return "gcm(aes)"; + default: + return "aes"; + } + break; + case CIPHER_ALG_DES: + switch (mode) { + case CIPHER_MODE_CBC: + return "cbc(des)"; + case CIPHER_MODE_ECB: + return "ecb(des)"; + case CIPHER_MODE_CTR: + return "ctr(des)"; + default: + return "des"; + } + break; + case CIPHER_ALG_3DES: + switch (mode) { + case CIPHER_MODE_CBC: + return "cbc(des3_ede)"; + case CIPHER_MODE_ECB: + return "ecb(des3_ede)"; + case CIPHER_MODE_CTR: + return "ctr(des3_ede)"; + default: + return "3des"; + } + break; + default: + return "other"; + } +} + +static ssize_t spu_debugfs_read(struct file *filp, char __user *ubuf, + size_t count, loff_t *offp) +{ + struct bcm_device_private *ipriv; + char *buf; + ssize_t ret, out_offset, out_count; + int i; + u32 fifo_len; + u32 spu_ofifo_ctrl; + u32 alg; + u32 mode; + u32 op_cnt; + + out_count = 2048; + + buf = kmalloc(out_count, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + ipriv = filp->private_data; + out_offset = 0; + out_offset += scnprintf(buf + out_offset, out_count - out_offset, + "Number of SPUs.........%u\n", + ipriv->spu.num_spu); + out_offset += scnprintf(buf + out_offset, out_count - out_offset, + "Current sessions.......%u\n", + atomic_read(&ipriv->session_count)); + out_offset += scnprintf(buf + out_offset, out_count - out_offset, + "Session count..........%u\n", + atomic_read(&ipriv->stream_count)); + out_offset += scnprintf(buf + out_offset, out_count - out_offset, + "Cipher setkey..........%u\n", + atomic_read(&ipriv->setkey_cnt[SPU_OP_CIPHER])); + out_offset += scnprintf(buf + out_offset, out_count - out_offset, + "Cipher Ops.............%u\n", + atomic_read(&ipriv->op_counts[SPU_OP_CIPHER])); + for (alg = 0; alg < CIPHER_ALG_LAST; alg++) { + for (mode = 0; mode < CIPHER_MODE_LAST; mode++) { + op_cnt = atomic_read(&ipriv->cipher_cnt[alg][mode]); + if (op_cnt) { + out_offset += scnprintf(buf + out_offset, + out_count - out_offset, + " %-13s%11u\n", + spu_alg_name(alg, mode), op_cnt); + } + } + } + out_offset += scnprintf(buf + out_offset, out_count - out_offset, + "Hash Ops...............%u\n", + atomic_read(&ipriv->op_counts[SPU_OP_HASH])); + for (alg = 0; alg < HASH_ALG_LAST; alg++) { + op_cnt = atomic_read(&ipriv->hash_cnt[alg]); + if (op_cnt) { + out_offset += scnprintf(buf + out_offset, + out_count - out_offset, + " %-13s%11u\n", + hash_alg_name[alg], op_cnt); + } + } + out_offset += scnprintf(buf + out_offset, out_count - out_offset, + "HMAC setkey............%u\n", + atomic_read(&ipriv->setkey_cnt[SPU_OP_HMAC])); + out_offset += scnprintf(buf + out_offset, out_count - out_offset, + "HMAC Ops...............%u\n", + atomic_read(&ipriv->op_counts[SPU_OP_HMAC])); + for (alg = 0; alg < HASH_ALG_LAST; alg++) { + op_cnt = atomic_read(&ipriv->hmac_cnt[alg]); + if (op_cnt) { + out_offset += scnprintf(buf + out_offset, + out_count - out_offset, + " %-13s%11u\n", + hash_alg_name[alg], op_cnt); + } + } + out_offset += scnprintf(buf + out_offset, out_count - out_offset, + "AEAD setkey............%u\n", + atomic_read(&ipriv->setkey_cnt[SPU_OP_AEAD])); + + out_offset += scnprintf(buf + out_offset, out_count - out_offset, + "AEAD Ops...............%u\n", + atomic_read(&ipriv->op_counts[SPU_OP_AEAD])); + for (alg = 0; alg < AEAD_TYPE_LAST; alg++) { + op_cnt = atomic_read(&ipriv->aead_cnt[alg]); + if (op_cnt) { + out_offset += scnprintf(buf + out_offset, + out_count - out_offset, + " %-13s%11u\n", + aead_alg_name[alg], op_cnt); + } + } + out_offset += scnprintf(buf + out_offset, out_count - out_offset, + "Bytes of req data......%llu\n", + (u64)atomic64_read(&ipriv->bytes_out)); + out_offset += scnprintf(buf + out_offset, out_count - out_offset, + "Bytes of resp data.....%llu\n", + (u64)atomic64_read(&ipriv->bytes_in)); + out_offset += scnprintf(buf + out_offset, out_count - out_offset, + "Mailbox full...........%u\n", + atomic_read(&ipriv->mb_no_spc)); + out_offset += scnprintf(buf + out_offset, out_count - out_offset, + "Mailbox send failures..%u\n", + atomic_read(&ipriv->mb_send_fail)); + out_offset += scnprintf(buf + out_offset, out_count - out_offset, + "Check ICV errors.......%u\n", + atomic_read(&ipriv->bad_icv)); + if (ipriv->spu.spu_type == SPU_TYPE_SPUM) + for (i = 0; i < ipriv->spu.num_spu; i++) { + spu_ofifo_ctrl = ioread32(ipriv->spu.reg_vbase[i] + + SPU_OFIFO_CTRL); + fifo_len = spu_ofifo_ctrl & SPU_FIFO_WATERMARK; + out_offset += scnprintf(buf + out_offset, + out_count - out_offset, + "SPU %d output FIFO high water.....%u\n", + i, fifo_len); + } + + if (out_offset > out_count) + out_offset = out_count; + + ret = simple_read_from_buffer(ubuf, count, offp, buf, out_offset); + kfree(buf); + return ret; +} + +static const struct file_operations spu_debugfs_stats = { + .owner = THIS_MODULE, + .open = simple_open, + .read = spu_debugfs_read, +}; + +/* + * Create the debug FS directories. If the top-level directory has not yet + * been created, create it now. Create a stats file in this directory for + * a SPU. + */ +void spu_setup_debugfs(void) +{ + if (!debugfs_initialized()) + return; + + if (!iproc_priv.debugfs_dir) + iproc_priv.debugfs_dir = debugfs_create_dir(KBUILD_MODNAME, + NULL); + + if (!iproc_priv.debugfs_stats) + /* Create file with permissions S_IRUSR */ + debugfs_create_file("stats", 0400, iproc_priv.debugfs_dir, + &iproc_priv, &spu_debugfs_stats); +} + +void spu_free_debugfs(void) +{ + debugfs_remove_recursive(iproc_priv.debugfs_dir); + iproc_priv.debugfs_dir = NULL; +} + +/** + * format_value_ccm() - Format a value into a buffer, using a specified number + * of bytes (i.e. maybe writing value X into a 4 byte + * buffer, or maybe into a 12 byte buffer), as per the + * SPU CCM spec. + * + * @val: value to write (up to max of unsigned int) + * @buf: (pointer to) buffer to write the value + * @len: number of bytes to use (0 to 255) + * + */ +void format_value_ccm(unsigned int val, u8 *buf, u8 len) +{ + int i; + + /* First clear full output buffer */ + memset(buf, 0, len); + + /* Then, starting from right side, fill in with data */ + for (i = 0; i < len; i++) { + buf[len - i - 1] = (val >> (8 * i)) & 0xff; + if (i >= 3) + break; /* Only handle up to 32 bits of 'val' */ + } +} -- cgit v1.2.3