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(). ... --- sound/xen/xen_snd_front_cfg.c | 519 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 519 insertions(+) create mode 100644 sound/xen/xen_snd_front_cfg.c (limited to 'sound/xen/xen_snd_front_cfg.c') diff --git a/sound/xen/xen_snd_front_cfg.c b/sound/xen/xen_snd_front_cfg.c new file mode 100644 index 000000000..63b0398c3 --- /dev/null +++ b/sound/xen/xen_snd_front_cfg.c @@ -0,0 +1,519 @@ +// SPDX-License-Identifier: GPL-2.0 OR MIT + +/* + * Xen para-virtual sound device + * + * Copyright (C) 2016-2018 EPAM Systems Inc. + * + * Author: Oleksandr Andrushchenko + */ + +#include + +#include + +#include "xen_snd_front.h" +#include "xen_snd_front_cfg.h" + +/* Maximum number of supported streams. */ +#define VSND_MAX_STREAM 8 + +struct cfg_hw_sample_rate { + const char *name; + unsigned int mask; + unsigned int value; +}; + +static const struct cfg_hw_sample_rate CFG_HW_SUPPORTED_RATES[] = { + { .name = "5512", .mask = SNDRV_PCM_RATE_5512, .value = 5512 }, + { .name = "8000", .mask = SNDRV_PCM_RATE_8000, .value = 8000 }, + { .name = "11025", .mask = SNDRV_PCM_RATE_11025, .value = 11025 }, + { .name = "16000", .mask = SNDRV_PCM_RATE_16000, .value = 16000 }, + { .name = "22050", .mask = SNDRV_PCM_RATE_22050, .value = 22050 }, + { .name = "32000", .mask = SNDRV_PCM_RATE_32000, .value = 32000 }, + { .name = "44100", .mask = SNDRV_PCM_RATE_44100, .value = 44100 }, + { .name = "48000", .mask = SNDRV_PCM_RATE_48000, .value = 48000 }, + { .name = "64000", .mask = SNDRV_PCM_RATE_64000, .value = 64000 }, + { .name = "96000", .mask = SNDRV_PCM_RATE_96000, .value = 96000 }, + { .name = "176400", .mask = SNDRV_PCM_RATE_176400, .value = 176400 }, + { .name = "192000", .mask = SNDRV_PCM_RATE_192000, .value = 192000 }, +}; + +struct cfg_hw_sample_format { + const char *name; + u64 mask; +}; + +static const struct cfg_hw_sample_format CFG_HW_SUPPORTED_FORMATS[] = { + { + .name = XENSND_PCM_FORMAT_U8_STR, + .mask = SNDRV_PCM_FMTBIT_U8 + }, + { + .name = XENSND_PCM_FORMAT_S8_STR, + .mask = SNDRV_PCM_FMTBIT_S8 + }, + { + .name = XENSND_PCM_FORMAT_U16_LE_STR, + .mask = SNDRV_PCM_FMTBIT_U16_LE + }, + { + .name = XENSND_PCM_FORMAT_U16_BE_STR, + .mask = SNDRV_PCM_FMTBIT_U16_BE + }, + { + .name = XENSND_PCM_FORMAT_S16_LE_STR, + .mask = SNDRV_PCM_FMTBIT_S16_LE + }, + { + .name = XENSND_PCM_FORMAT_S16_BE_STR, + .mask = SNDRV_PCM_FMTBIT_S16_BE + }, + { + .name = XENSND_PCM_FORMAT_U24_LE_STR, + .mask = SNDRV_PCM_FMTBIT_U24_LE + }, + { + .name = XENSND_PCM_FORMAT_U24_BE_STR, + .mask = SNDRV_PCM_FMTBIT_U24_BE + }, + { + .name = XENSND_PCM_FORMAT_S24_LE_STR, + .mask = SNDRV_PCM_FMTBIT_S24_LE + }, + { + .name = XENSND_PCM_FORMAT_S24_BE_STR, + .mask = SNDRV_PCM_FMTBIT_S24_BE + }, + { + .name = XENSND_PCM_FORMAT_U32_LE_STR, + .mask = SNDRV_PCM_FMTBIT_U32_LE + }, + { + .name = XENSND_PCM_FORMAT_U32_BE_STR, + .mask = SNDRV_PCM_FMTBIT_U32_BE + }, + { + .name = XENSND_PCM_FORMAT_S32_LE_STR, + .mask = SNDRV_PCM_FMTBIT_S32_LE + }, + { + .name = XENSND_PCM_FORMAT_S32_BE_STR, + .mask = SNDRV_PCM_FMTBIT_S32_BE + }, + { + .name = XENSND_PCM_FORMAT_A_LAW_STR, + .mask = SNDRV_PCM_FMTBIT_A_LAW + }, + { + .name = XENSND_PCM_FORMAT_MU_LAW_STR, + .mask = SNDRV_PCM_FMTBIT_MU_LAW + }, + { + .name = XENSND_PCM_FORMAT_F32_LE_STR, + .mask = SNDRV_PCM_FMTBIT_FLOAT_LE + }, + { + .name = XENSND_PCM_FORMAT_F32_BE_STR, + .mask = SNDRV_PCM_FMTBIT_FLOAT_BE + }, + { + .name = XENSND_PCM_FORMAT_F64_LE_STR, + .mask = SNDRV_PCM_FMTBIT_FLOAT64_LE + }, + { + .name = XENSND_PCM_FORMAT_F64_BE_STR, + .mask = SNDRV_PCM_FMTBIT_FLOAT64_BE + }, + { + .name = XENSND_PCM_FORMAT_IEC958_SUBFRAME_LE_STR, + .mask = SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE + }, + { + .name = XENSND_PCM_FORMAT_IEC958_SUBFRAME_BE_STR, + .mask = SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE + }, + { + .name = XENSND_PCM_FORMAT_IMA_ADPCM_STR, + .mask = SNDRV_PCM_FMTBIT_IMA_ADPCM + }, + { + .name = XENSND_PCM_FORMAT_MPEG_STR, + .mask = SNDRV_PCM_FMTBIT_MPEG + }, + { + .name = XENSND_PCM_FORMAT_GSM_STR, + .mask = SNDRV_PCM_FMTBIT_GSM + }, +}; + +static void cfg_hw_rates(char *list, unsigned int len, + const char *path, struct snd_pcm_hardware *pcm_hw) +{ + char *cur_rate; + unsigned int cur_mask; + unsigned int cur_value; + unsigned int rates; + unsigned int rate_min; + unsigned int rate_max; + int i; + + rates = 0; + rate_min = -1; + rate_max = 0; + while ((cur_rate = strsep(&list, XENSND_LIST_SEPARATOR))) { + for (i = 0; i < ARRAY_SIZE(CFG_HW_SUPPORTED_RATES); i++) + if (!strncasecmp(cur_rate, + CFG_HW_SUPPORTED_RATES[i].name, + XENSND_SAMPLE_RATE_MAX_LEN)) { + cur_mask = CFG_HW_SUPPORTED_RATES[i].mask; + cur_value = CFG_HW_SUPPORTED_RATES[i].value; + rates |= cur_mask; + if (rate_min > cur_value) + rate_min = cur_value; + if (rate_max < cur_value) + rate_max = cur_value; + } + } + + if (rates) { + pcm_hw->rates = rates; + pcm_hw->rate_min = rate_min; + pcm_hw->rate_max = rate_max; + } +} + +static void cfg_formats(char *list, unsigned int len, + const char *path, struct snd_pcm_hardware *pcm_hw) +{ + u64 formats; + char *cur_format; + int i; + + formats = 0; + while ((cur_format = strsep(&list, XENSND_LIST_SEPARATOR))) { + for (i = 0; i < ARRAY_SIZE(CFG_HW_SUPPORTED_FORMATS); i++) + if (!strncasecmp(cur_format, + CFG_HW_SUPPORTED_FORMATS[i].name, + XENSND_SAMPLE_FORMAT_MAX_LEN)) + formats |= CFG_HW_SUPPORTED_FORMATS[i].mask; + } + + if (formats) + pcm_hw->formats = formats; +} + +#define MAX_BUFFER_SIZE (64 * 1024) +#define MIN_PERIOD_SIZE 64 +#define MAX_PERIOD_SIZE MAX_BUFFER_SIZE +#define USE_FORMATS (SNDRV_PCM_FMTBIT_U8 | \ + SNDRV_PCM_FMTBIT_S16_LE) +#define USE_RATE (SNDRV_PCM_RATE_CONTINUOUS | \ + SNDRV_PCM_RATE_8000_48000) +#define USE_RATE_MIN 5512 +#define USE_RATE_MAX 48000 +#define USE_CHANNELS_MIN 1 +#define USE_CHANNELS_MAX 2 +#define USE_PERIODS_MIN 2 +#define USE_PERIODS_MAX (MAX_BUFFER_SIZE / MIN_PERIOD_SIZE) + +static const struct snd_pcm_hardware SND_DRV_PCM_HW_DEFAULT = { + .info = (SNDRV_PCM_INFO_MMAP | + SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_RESUME | + SNDRV_PCM_INFO_MMAP_VALID), + .formats = USE_FORMATS, + .rates = USE_RATE, + .rate_min = USE_RATE_MIN, + .rate_max = USE_RATE_MAX, + .channels_min = USE_CHANNELS_MIN, + .channels_max = USE_CHANNELS_MAX, + .buffer_bytes_max = MAX_BUFFER_SIZE, + .period_bytes_min = MIN_PERIOD_SIZE, + .period_bytes_max = MAX_PERIOD_SIZE, + .periods_min = USE_PERIODS_MIN, + .periods_max = USE_PERIODS_MAX, + .fifo_size = 0, +}; + +static void cfg_read_pcm_hw(const char *path, + struct snd_pcm_hardware *parent_pcm_hw, + struct snd_pcm_hardware *pcm_hw) +{ + char *list; + int val; + size_t buf_sz; + unsigned int len; + + /* Inherit parent's PCM HW and read overrides from XenStore. */ + if (parent_pcm_hw) + *pcm_hw = *parent_pcm_hw; + else + *pcm_hw = SND_DRV_PCM_HW_DEFAULT; + + val = xenbus_read_unsigned(path, XENSND_FIELD_CHANNELS_MIN, 0); + if (val) + pcm_hw->channels_min = val; + + val = xenbus_read_unsigned(path, XENSND_FIELD_CHANNELS_MAX, 0); + if (val) + pcm_hw->channels_max = val; + + list = xenbus_read(XBT_NIL, path, XENSND_FIELD_SAMPLE_RATES, &len); + if (!IS_ERR(list)) { + cfg_hw_rates(list, len, path, pcm_hw); + kfree(list); + } + + list = xenbus_read(XBT_NIL, path, XENSND_FIELD_SAMPLE_FORMATS, &len); + if (!IS_ERR(list)) { + cfg_formats(list, len, path, pcm_hw); + kfree(list); + } + + buf_sz = xenbus_read_unsigned(path, XENSND_FIELD_BUFFER_SIZE, 0); + if (buf_sz) + pcm_hw->buffer_bytes_max = buf_sz; + + /* Update configuration to match new values. */ + if (pcm_hw->channels_min > pcm_hw->channels_max) + pcm_hw->channels_min = pcm_hw->channels_max; + + if (pcm_hw->rate_min > pcm_hw->rate_max) + pcm_hw->rate_min = pcm_hw->rate_max; + + pcm_hw->period_bytes_max = pcm_hw->buffer_bytes_max; + + pcm_hw->periods_max = pcm_hw->period_bytes_max / + pcm_hw->period_bytes_min; +} + +static int cfg_get_stream_type(const char *path, int index, + int *num_pb, int *num_cap) +{ + char *str = NULL; + char *stream_path; + int ret; + + *num_pb = 0; + *num_cap = 0; + stream_path = kasprintf(GFP_KERNEL, "%s/%d", path, index); + if (!stream_path) { + ret = -ENOMEM; + goto fail; + } + + str = xenbus_read(XBT_NIL, stream_path, XENSND_FIELD_TYPE, NULL); + if (IS_ERR(str)) { + ret = PTR_ERR(str); + str = NULL; + goto fail; + } + + if (!strncasecmp(str, XENSND_STREAM_TYPE_PLAYBACK, + sizeof(XENSND_STREAM_TYPE_PLAYBACK))) { + (*num_pb)++; + } else if (!strncasecmp(str, XENSND_STREAM_TYPE_CAPTURE, + sizeof(XENSND_STREAM_TYPE_CAPTURE))) { + (*num_cap)++; + } else { + ret = -EINVAL; + goto fail; + } + ret = 0; + +fail: + kfree(stream_path); + kfree(str); + return ret; +} + +static int cfg_stream(struct xen_snd_front_info *front_info, + struct xen_front_cfg_pcm_instance *pcm_instance, + const char *path, int index, int *cur_pb, int *cur_cap, + int *stream_cnt) +{ + char *str = NULL; + char *stream_path; + struct xen_front_cfg_stream *stream; + int ret; + + stream_path = devm_kasprintf(&front_info->xb_dev->dev, + GFP_KERNEL, "%s/%d", path, index); + if (!stream_path) { + ret = -ENOMEM; + goto fail; + } + + str = xenbus_read(XBT_NIL, stream_path, XENSND_FIELD_TYPE, NULL); + if (IS_ERR(str)) { + ret = PTR_ERR(str); + str = NULL; + goto fail; + } + + if (!strncasecmp(str, XENSND_STREAM_TYPE_PLAYBACK, + sizeof(XENSND_STREAM_TYPE_PLAYBACK))) { + stream = &pcm_instance->streams_pb[(*cur_pb)++]; + } else if (!strncasecmp(str, XENSND_STREAM_TYPE_CAPTURE, + sizeof(XENSND_STREAM_TYPE_CAPTURE))) { + stream = &pcm_instance->streams_cap[(*cur_cap)++]; + } else { + ret = -EINVAL; + goto fail; + } + + /* Get next stream index. */ + stream->index = (*stream_cnt)++; + stream->xenstore_path = stream_path; + /* + * Check XenStore if PCM HW configuration exists for this stream + * and update if so, e.g. we inherit all values from device's PCM HW, + * but can still override some of the values for the stream. + */ + cfg_read_pcm_hw(stream->xenstore_path, + &pcm_instance->pcm_hw, &stream->pcm_hw); + ret = 0; + +fail: + kfree(str); + return ret; +} + +static int cfg_device(struct xen_snd_front_info *front_info, + struct xen_front_cfg_pcm_instance *pcm_instance, + struct snd_pcm_hardware *parent_pcm_hw, + const char *path, int node_index, int *stream_cnt) +{ + char *str; + char *device_path; + int ret, i, num_streams; + int num_pb, num_cap; + int cur_pb, cur_cap; + char node[3]; + + device_path = kasprintf(GFP_KERNEL, "%s/%d", path, node_index); + if (!device_path) + return -ENOMEM; + + str = xenbus_read(XBT_NIL, device_path, XENSND_FIELD_DEVICE_NAME, NULL); + if (!IS_ERR(str)) { + strscpy(pcm_instance->name, str, sizeof(pcm_instance->name)); + kfree(str); + } + + pcm_instance->device_id = node_index; + + /* + * Check XenStore if PCM HW configuration exists for this device + * and update if so, e.g. we inherit all values from card's PCM HW, + * but can still override some of the values for the device. + */ + cfg_read_pcm_hw(device_path, parent_pcm_hw, &pcm_instance->pcm_hw); + + /* Find out how many streams were configured in Xen store. */ + num_streams = 0; + do { + snprintf(node, sizeof(node), "%d", num_streams); + if (!xenbus_exists(XBT_NIL, device_path, node)) + break; + + num_streams++; + } while (num_streams < VSND_MAX_STREAM); + + pcm_instance->num_streams_pb = 0; + pcm_instance->num_streams_cap = 0; + /* Get number of playback and capture streams. */ + for (i = 0; i < num_streams; i++) { + ret = cfg_get_stream_type(device_path, i, &num_pb, &num_cap); + if (ret < 0) + goto fail; + + pcm_instance->num_streams_pb += num_pb; + pcm_instance->num_streams_cap += num_cap; + } + + if (pcm_instance->num_streams_pb) { + pcm_instance->streams_pb = + devm_kcalloc(&front_info->xb_dev->dev, + pcm_instance->num_streams_pb, + sizeof(struct xen_front_cfg_stream), + GFP_KERNEL); + if (!pcm_instance->streams_pb) { + ret = -ENOMEM; + goto fail; + } + } + + if (pcm_instance->num_streams_cap) { + pcm_instance->streams_cap = + devm_kcalloc(&front_info->xb_dev->dev, + pcm_instance->num_streams_cap, + sizeof(struct xen_front_cfg_stream), + GFP_KERNEL); + if (!pcm_instance->streams_cap) { + ret = -ENOMEM; + goto fail; + } + } + + cur_pb = 0; + cur_cap = 0; + for (i = 0; i < num_streams; i++) { + ret = cfg_stream(front_info, pcm_instance, device_path, i, + &cur_pb, &cur_cap, stream_cnt); + if (ret < 0) + goto fail; + } + ret = 0; + +fail: + kfree(device_path); + return ret; +} + +int xen_snd_front_cfg_card(struct xen_snd_front_info *front_info, + int *stream_cnt) +{ + struct xenbus_device *xb_dev = front_info->xb_dev; + struct xen_front_cfg_card *cfg = &front_info->cfg; + int ret, num_devices, i; + char node[3]; + + *stream_cnt = 0; + num_devices = 0; + do { + snprintf(node, sizeof(node), "%d", num_devices); + if (!xenbus_exists(XBT_NIL, xb_dev->nodename, node)) + break; + + num_devices++; + } while (num_devices < SNDRV_PCM_DEVICES); + + if (!num_devices) { + dev_warn(&xb_dev->dev, + "No devices configured for sound card at %s\n", + xb_dev->nodename); + return -ENODEV; + } + + /* Start from default PCM HW configuration for the card. */ + cfg_read_pcm_hw(xb_dev->nodename, NULL, &cfg->pcm_hw); + + cfg->pcm_instances = + devm_kcalloc(&front_info->xb_dev->dev, num_devices, + sizeof(struct xen_front_cfg_pcm_instance), + GFP_KERNEL); + if (!cfg->pcm_instances) + return -ENOMEM; + + for (i = 0; i < num_devices; i++) { + ret = cfg_device(front_info, &cfg->pcm_instances[i], + &cfg->pcm_hw, xb_dev->nodename, i, stream_cnt); + if (ret < 0) + return ret; + } + cfg->num_pcm_instances = num_devices; + return 0; +} + -- cgit v1.2.3