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/media/pci/saa7164/saa7164-cmd.c | 568 ++++++++++++++++++++++++++++++++ 1 file changed, 568 insertions(+) create mode 100644 drivers/media/pci/saa7164/saa7164-cmd.c (limited to 'drivers/media/pci/saa7164/saa7164-cmd.c') diff --git a/drivers/media/pci/saa7164/saa7164-cmd.c b/drivers/media/pci/saa7164/saa7164-cmd.c new file mode 100644 index 000000000..42bd8e760 --- /dev/null +++ b/drivers/media/pci/saa7164/saa7164-cmd.c @@ -0,0 +1,568 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Driver for the NXP SAA7164 PCIe bridge + * + * Copyright (c) 2010-2015 Steven Toth + */ + +#include + +#include "saa7164.h" + +static int saa7164_cmd_alloc_seqno(struct saa7164_dev *dev) +{ + int i, ret = -1; + + mutex_lock(&dev->lock); + for (i = 0; i < SAA_CMD_MAX_MSG_UNITS; i++) { + if (dev->cmds[i].inuse == 0) { + dev->cmds[i].inuse = 1; + dev->cmds[i].signalled = 0; + dev->cmds[i].timeout = 0; + ret = dev->cmds[i].seqno; + break; + } + } + mutex_unlock(&dev->lock); + + return ret; +} + +static void saa7164_cmd_free_seqno(struct saa7164_dev *dev, u8 seqno) +{ + mutex_lock(&dev->lock); + if ((dev->cmds[seqno].inuse == 1) && + (dev->cmds[seqno].seqno == seqno)) { + dev->cmds[seqno].inuse = 0; + dev->cmds[seqno].signalled = 0; + dev->cmds[seqno].timeout = 0; + } + mutex_unlock(&dev->lock); +} + +static void saa7164_cmd_timeout_seqno(struct saa7164_dev *dev, u8 seqno) +{ + mutex_lock(&dev->lock); + if ((dev->cmds[seqno].inuse == 1) && + (dev->cmds[seqno].seqno == seqno)) { + dev->cmds[seqno].timeout = 1; + } + mutex_unlock(&dev->lock); +} + +static u32 saa7164_cmd_timeout_get(struct saa7164_dev *dev, u8 seqno) +{ + int ret = 0; + + mutex_lock(&dev->lock); + if ((dev->cmds[seqno].inuse == 1) && + (dev->cmds[seqno].seqno == seqno)) { + ret = dev->cmds[seqno].timeout; + } + mutex_unlock(&dev->lock); + + return ret; +} + +/* Commands to the f/w get marshelled to/from this code then onto the PCI + * -bus/c running buffer. */ +int saa7164_irq_dequeue(struct saa7164_dev *dev) +{ + int ret = SAA_OK, i = 0; + u32 timeout; + wait_queue_head_t *q = NULL; + u8 tmp[512]; + dprintk(DBGLVL_CMD, "%s()\n", __func__); + + /* While any outstand message on the bus exists... */ + do { + + /* Peek the msg bus */ + struct tmComResInfo tRsp = { 0, 0, 0, 0, 0, 0 }; + ret = saa7164_bus_get(dev, &tRsp, NULL, 1); + if (ret != SAA_OK) + break; + + q = &dev->cmds[tRsp.seqno].wait; + timeout = saa7164_cmd_timeout_get(dev, tRsp.seqno); + dprintk(DBGLVL_CMD, "%s() timeout = %d\n", __func__, timeout); + if (!timeout) { + dprintk(DBGLVL_CMD, + "%s() signalled seqno(%d) (for dequeue)\n", + __func__, tRsp.seqno); + dev->cmds[tRsp.seqno].signalled = 1; + wake_up(q); + } else { + printk(KERN_ERR + "%s() found timed out command on the bus\n", + __func__); + + /* Clean the bus */ + ret = saa7164_bus_get(dev, &tRsp, &tmp, 0); + printk(KERN_ERR "%s() ret = %x\n", __func__, ret); + if (ret == SAA_ERR_EMPTY) + /* Someone else already fetched the response */ + return SAA_OK; + + if (ret != SAA_OK) + return ret; + } + + /* It's unlikely to have more than 4 or 5 pending messages, + * ensure we exit at some point regardless. + */ + } while (i++ < 32); + + return ret; +} + +/* Commands to the f/w get marshelled to/from this code then onto the PCI + * -bus/c running buffer. */ +static int saa7164_cmd_dequeue(struct saa7164_dev *dev) +{ + int ret; + u32 timeout; + wait_queue_head_t *q = NULL; + u8 tmp[512]; + dprintk(DBGLVL_CMD, "%s()\n", __func__); + + while (true) { + + struct tmComResInfo tRsp = { 0, 0, 0, 0, 0, 0 }; + ret = saa7164_bus_get(dev, &tRsp, NULL, 1); + if (ret == SAA_ERR_EMPTY) + return SAA_OK; + + if (ret != SAA_OK) + return ret; + + q = &dev->cmds[tRsp.seqno].wait; + timeout = saa7164_cmd_timeout_get(dev, tRsp.seqno); + dprintk(DBGLVL_CMD, "%s() timeout = %d\n", __func__, timeout); + if (timeout) { + printk(KERN_ERR "found timed out command on the bus\n"); + + /* Clean the bus */ + ret = saa7164_bus_get(dev, &tRsp, &tmp, 0); + printk(KERN_ERR "ret = %x\n", ret); + if (ret == SAA_ERR_EMPTY) + /* Someone else already fetched the response */ + return SAA_OK; + + if (ret != SAA_OK) + return ret; + + if (tRsp.flags & PVC_CMDFLAG_CONTINUE) + printk(KERN_ERR "split response\n"); + else + saa7164_cmd_free_seqno(dev, tRsp.seqno); + + printk(KERN_ERR " timeout continue\n"); + continue; + } + + dprintk(DBGLVL_CMD, "%s() signalled seqno(%d) (for dequeue)\n", + __func__, tRsp.seqno); + dev->cmds[tRsp.seqno].signalled = 1; + wake_up(q); + return SAA_OK; + } +} + +static int saa7164_cmd_set(struct saa7164_dev *dev, struct tmComResInfo *msg, + void *buf) +{ + struct tmComResBusInfo *bus = &dev->bus; + u8 cmd_sent; + u16 size, idx; + u32 cmds; + void *tmp; + int ret = -1; + + if (!msg) { + printk(KERN_ERR "%s() !msg\n", __func__); + return SAA_ERR_BAD_PARAMETER; + } + + mutex_lock(&dev->cmds[msg->id].lock); + + size = msg->size; + cmds = size / bus->m_wMaxReqSize; + if (size % bus->m_wMaxReqSize == 0) + cmds -= 1; + + cmd_sent = 0; + + /* Split the request into smaller chunks */ + for (idx = 0; idx < cmds; idx++) { + + msg->flags |= SAA_CMDFLAG_CONTINUE; + msg->size = bus->m_wMaxReqSize; + tmp = buf + idx * bus->m_wMaxReqSize; + + ret = saa7164_bus_set(dev, msg, tmp); + if (ret != SAA_OK) { + printk(KERN_ERR "%s() set failed %d\n", __func__, ret); + + if (cmd_sent) { + ret = SAA_ERR_BUSY; + goto out; + } + ret = SAA_ERR_OVERFLOW; + goto out; + } + cmd_sent = 1; + } + + /* If not the last command... */ + if (idx != 0) + msg->flags &= ~SAA_CMDFLAG_CONTINUE; + + msg->size = size - idx * bus->m_wMaxReqSize; + + ret = saa7164_bus_set(dev, msg, buf + idx * bus->m_wMaxReqSize); + if (ret != SAA_OK) { + printk(KERN_ERR "%s() set last failed %d\n", __func__, ret); + + if (cmd_sent) { + ret = SAA_ERR_BUSY; + goto out; + } + ret = SAA_ERR_OVERFLOW; + goto out; + } + ret = SAA_OK; + +out: + mutex_unlock(&dev->cmds[msg->id].lock); + return ret; +} + +/* Wait for a signal event, without holding a mutex. Either return TIMEOUT if + * the event never occurred, or SAA_OK if it was signaled during the wait. + */ +static int saa7164_cmd_wait(struct saa7164_dev *dev, u8 seqno) +{ + wait_queue_head_t *q = NULL; + int ret = SAA_BUS_TIMEOUT; + unsigned long stamp; + int r; + + if (saa_debug >= 4) + saa7164_bus_dump(dev); + + dprintk(DBGLVL_CMD, "%s(seqno=%d)\n", __func__, seqno); + + mutex_lock(&dev->lock); + if ((dev->cmds[seqno].inuse == 1) && + (dev->cmds[seqno].seqno == seqno)) { + q = &dev->cmds[seqno].wait; + } + mutex_unlock(&dev->lock); + + if (q) { + /* If we haven't been signalled we need to wait */ + if (dev->cmds[seqno].signalled == 0) { + stamp = jiffies; + dprintk(DBGLVL_CMD, + "%s(seqno=%d) Waiting (signalled=%d)\n", + __func__, seqno, dev->cmds[seqno].signalled); + + /* Wait for signalled to be flagged or timeout */ + /* In a highly stressed system this can easily extend + * into multiple seconds before the deferred worker + * is scheduled, and we're woken up via signal. + * We typically are signalled in < 50ms but it can + * take MUCH longer. + */ + wait_event_timeout(*q, dev->cmds[seqno].signalled, + (HZ * waitsecs)); + r = time_before(jiffies, stamp + (HZ * waitsecs)); + if (r) + ret = SAA_OK; + else + saa7164_cmd_timeout_seqno(dev, seqno); + + dprintk(DBGLVL_CMD, "%s(seqno=%d) Waiting res = %d (signalled=%d)\n", + __func__, seqno, r, + dev->cmds[seqno].signalled); + } else + ret = SAA_OK; + } else + printk(KERN_ERR "%s(seqno=%d) seqno is invalid\n", + __func__, seqno); + + return ret; +} + +void saa7164_cmd_signal(struct saa7164_dev *dev, u8 seqno) +{ + int i; + dprintk(DBGLVL_CMD, "%s()\n", __func__); + + mutex_lock(&dev->lock); + for (i = 0; i < SAA_CMD_MAX_MSG_UNITS; i++) { + if (dev->cmds[i].inuse == 1) { + dprintk(DBGLVL_CMD, + "seqno %d inuse, sig = %d, t/out = %d\n", + dev->cmds[i].seqno, + dev->cmds[i].signalled, + dev->cmds[i].timeout); + } + } + + for (i = 0; i < SAA_CMD_MAX_MSG_UNITS; i++) { + if ((dev->cmds[i].inuse == 1) && ((i == 0) || + (dev->cmds[i].signalled) || (dev->cmds[i].timeout))) { + dprintk(DBGLVL_CMD, "%s(seqno=%d) calling wake_up\n", + __func__, i); + dev->cmds[i].signalled = 1; + wake_up(&dev->cmds[i].wait); + } + } + mutex_unlock(&dev->lock); +} + +int saa7164_cmd_send(struct saa7164_dev *dev, u8 id, enum tmComResCmd command, + u16 controlselector, u16 size, void *buf) +{ + struct tmComResInfo command_t, *pcommand_t; + struct tmComResInfo response_t, *presponse_t; + u8 errdata[256]; + u16 resp_dsize; + u16 data_recd; + u32 loop; + int ret; + int safety = 0; + + dprintk(DBGLVL_CMD, "%s(unitid = %s (%d) , command = 0x%x, sel = 0x%x)\n", + __func__, saa7164_unitid_name(dev, id), id, + command, controlselector); + + if ((size == 0) || (buf == NULL)) { + printk(KERN_ERR "%s() Invalid param\n", __func__); + return SAA_ERR_BAD_PARAMETER; + } + + /* Prepare some basic command/response structures */ + memset(&command_t, 0, sizeof(command_t)); + memset(&response_t, 0, sizeof(response_t)); + pcommand_t = &command_t; + presponse_t = &response_t; + command_t.id = id; + command_t.command = command; + command_t.controlselector = controlselector; + command_t.size = size; + + /* Allocate a unique sequence number */ + ret = saa7164_cmd_alloc_seqno(dev); + if (ret < 0) { + printk(KERN_ERR "%s() No free sequences\n", __func__); + ret = SAA_ERR_NO_RESOURCES; + goto out; + } + + command_t.seqno = (u8)ret; + + /* Send Command */ + resp_dsize = size; + pcommand_t->size = size; + + dprintk(DBGLVL_CMD, "%s() pcommand_t.seqno = %d\n", + __func__, pcommand_t->seqno); + + dprintk(DBGLVL_CMD, "%s() pcommand_t.size = %d\n", + __func__, pcommand_t->size); + + ret = saa7164_cmd_set(dev, pcommand_t, buf); + if (ret != SAA_OK) { + printk(KERN_ERR "%s() set command failed %d\n", __func__, ret); + + if (ret != SAA_ERR_BUSY) + saa7164_cmd_free_seqno(dev, pcommand_t->seqno); + else + /* Flag a timeout, because at least one + * command was sent */ + saa7164_cmd_timeout_seqno(dev, pcommand_t->seqno); + + goto out; + } + + /* With split responses we have to collect the msgs piece by piece */ + data_recd = 0; + loop = 1; + while (loop) { + dprintk(DBGLVL_CMD, "%s() loop\n", __func__); + + ret = saa7164_cmd_wait(dev, pcommand_t->seqno); + dprintk(DBGLVL_CMD, "%s() loop ret = %d\n", __func__, ret); + + /* if power is down and this is not a power command ... */ + + if (ret == SAA_BUS_TIMEOUT) { + printk(KERN_ERR "Event timed out\n"); + saa7164_cmd_timeout_seqno(dev, pcommand_t->seqno); + return ret; + } + + if (ret != SAA_OK) { + printk(KERN_ERR "spurious error\n"); + return ret; + } + + /* Peek response */ + ret = saa7164_bus_get(dev, presponse_t, NULL, 1); + if (ret == SAA_ERR_EMPTY) { + dprintk(4, "%s() SAA_ERR_EMPTY\n", __func__); + continue; + } + if (ret != SAA_OK) { + printk(KERN_ERR "peek failed\n"); + return ret; + } + + dprintk(DBGLVL_CMD, "%s() presponse_t->seqno = %d\n", + __func__, presponse_t->seqno); + + dprintk(DBGLVL_CMD, "%s() presponse_t->flags = 0x%x\n", + __func__, presponse_t->flags); + + dprintk(DBGLVL_CMD, "%s() presponse_t->size = %d\n", + __func__, presponse_t->size); + + /* Check if the response was for our command */ + if (presponse_t->seqno != pcommand_t->seqno) { + + dprintk(DBGLVL_CMD, + "wrong event: seqno = %d, expected seqno = %d, will dequeue regardless\n", + presponse_t->seqno, pcommand_t->seqno); + + ret = saa7164_cmd_dequeue(dev); + if (ret != SAA_OK) { + printk(KERN_ERR "dequeue failed, ret = %d\n", + ret); + if (safety++ > 16) { + printk(KERN_ERR + "dequeue exceeded, safety exit\n"); + return SAA_ERR_BUSY; + } + } + + continue; + } + + if ((presponse_t->flags & PVC_RESPONSEFLAG_ERROR) != 0) { + + memset(&errdata[0], 0, sizeof(errdata)); + + ret = saa7164_bus_get(dev, presponse_t, &errdata[0], 0); + if (ret != SAA_OK) { + printk(KERN_ERR "get error(2)\n"); + return ret; + } + + saa7164_cmd_free_seqno(dev, pcommand_t->seqno); + + dprintk(DBGLVL_CMD, "%s() errdata %02x%02x%02x%02x\n", + __func__, errdata[0], errdata[1], errdata[2], + errdata[3]); + + /* Map error codes */ + dprintk(DBGLVL_CMD, "%s() cmd, error code = 0x%x\n", + __func__, errdata[0]); + + switch (errdata[0]) { + case PVC_ERRORCODE_INVALID_COMMAND: + dprintk(DBGLVL_CMD, "%s() INVALID_COMMAND\n", + __func__); + ret = SAA_ERR_INVALID_COMMAND; + break; + case PVC_ERRORCODE_INVALID_DATA: + dprintk(DBGLVL_CMD, "%s() INVALID_DATA\n", + __func__); + ret = SAA_ERR_BAD_PARAMETER; + break; + case PVC_ERRORCODE_TIMEOUT: + dprintk(DBGLVL_CMD, "%s() TIMEOUT\n", __func__); + ret = SAA_ERR_TIMEOUT; + break; + case PVC_ERRORCODE_NAK: + dprintk(DBGLVL_CMD, "%s() NAK\n", __func__); + ret = SAA_ERR_NULL_PACKET; + break; + case PVC_ERRORCODE_UNKNOWN: + case PVC_ERRORCODE_INVALID_CONTROL: + dprintk(DBGLVL_CMD, + "%s() UNKNOWN OR INVALID CONTROL\n", + __func__); + ret = SAA_ERR_NOT_SUPPORTED; + break; + default: + dprintk(DBGLVL_CMD, "%s() UNKNOWN\n", __func__); + ret = SAA_ERR_NOT_SUPPORTED; + } + + /* See of other commands are on the bus */ + if (saa7164_cmd_dequeue(dev) != SAA_OK) + printk(KERN_ERR "dequeue(2) failed\n"); + + return ret; + } + + /* If response is invalid */ + if ((presponse_t->id != pcommand_t->id) || + (presponse_t->command != pcommand_t->command) || + (presponse_t->controlselector != + pcommand_t->controlselector) || + (((resp_dsize - data_recd) != presponse_t->size) && + !(presponse_t->flags & PVC_CMDFLAG_CONTINUE)) || + ((resp_dsize - data_recd) < presponse_t->size)) { + + /* Invalid */ + dprintk(DBGLVL_CMD, "%s() Invalid\n", __func__); + ret = saa7164_bus_get(dev, presponse_t, NULL, 0); + if (ret != SAA_OK) { + printk(KERN_ERR "get failed\n"); + return ret; + } + + /* See of other commands are on the bus */ + if (saa7164_cmd_dequeue(dev) != SAA_OK) + printk(KERN_ERR "dequeue(3) failed\n"); + continue; + } + + /* OK, now we're actually getting out correct response */ + ret = saa7164_bus_get(dev, presponse_t, buf + data_recd, 0); + if (ret != SAA_OK) { + printk(KERN_ERR "get failed\n"); + return ret; + } + + data_recd = presponse_t->size + data_recd; + if (resp_dsize == data_recd) { + dprintk(DBGLVL_CMD, "%s() Resp recd\n", __func__); + break; + } + + /* See of other commands are on the bus */ + if (saa7164_cmd_dequeue(dev) != SAA_OK) + printk(KERN_ERR "dequeue(3) failed\n"); + } /* (loop) */ + + /* Release the sequence number allocation */ + saa7164_cmd_free_seqno(dev, pcommand_t->seqno); + + /* if powerdown signal all pending commands */ + + dprintk(DBGLVL_CMD, "%s() Calling dequeue then exit\n", __func__); + + /* See of other commands are on the bus */ + if (saa7164_cmd_dequeue(dev) != SAA_OK) + printk(KERN_ERR "dequeue(4) failed\n"); + + ret = SAA_OK; +out: + return ret; +} + -- cgit v1.2.3