/* * HD-audio controller helpers */ #include #include #include #include #include #include /* clear CORB read pointer properly */ static void azx_clear_corbrp(struct hdac_bus *bus) { int timeout; for (timeout = 1000; timeout > 0; timeout--) { if (snd_hdac_chip_readw(bus, CORBRP) & AZX_CORBRP_RST) break; udelay(1); } if (timeout <= 0) dev_err(bus->dev, "CORB reset timeout#1, CORBRP = %d\n", snd_hdac_chip_readw(bus, CORBRP)); snd_hdac_chip_writew(bus, CORBRP, 0); for (timeout = 1000; timeout > 0; timeout--) { if (snd_hdac_chip_readw(bus, CORBRP) == 0) break; udelay(1); } if (timeout <= 0) dev_err(bus->dev, "CORB reset timeout#2, CORBRP = %d\n", snd_hdac_chip_readw(bus, CORBRP)); } /** * snd_hdac_bus_init_cmd_io - set up CORB/RIRB buffers * @bus: HD-audio core bus */ void snd_hdac_bus_init_cmd_io(struct hdac_bus *bus) { spin_lock_irq(&bus->reg_lock); /* CORB set up */ bus->corb.addr = bus->rb.addr; bus->corb.buf = (__le32 *)bus->rb.area; snd_hdac_chip_writel(bus, CORBLBASE, (u32)bus->corb.addr); snd_hdac_chip_writel(bus, CORBUBASE, upper_32_bits(bus->corb.addr)); /* set the corb size to 256 entries (ULI requires explicitly) */ snd_hdac_chip_writeb(bus, CORBSIZE, 0x02); /* set the corb write pointer to 0 */ snd_hdac_chip_writew(bus, CORBWP, 0); /* reset the corb hw read pointer */ snd_hdac_chip_writew(bus, CORBRP, AZX_CORBRP_RST); if (!bus->corbrp_self_clear) azx_clear_corbrp(bus); /* enable corb dma */ snd_hdac_chip_writeb(bus, CORBCTL, AZX_CORBCTL_RUN); /* RIRB set up */ bus->rirb.addr = bus->rb.addr + 2048; bus->rirb.buf = (__le32 *)(bus->rb.area + 2048); bus->rirb.wp = bus->rirb.rp = 0; memset(bus->rirb.cmds, 0, sizeof(bus->rirb.cmds)); snd_hdac_chip_writel(bus, RIRBLBASE, (u32)bus->rirb.addr); snd_hdac_chip_writel(bus, RIRBUBASE, upper_32_bits(bus->rirb.addr)); /* set the rirb size to 256 entries (ULI requires explicitly) */ snd_hdac_chip_writeb(bus, RIRBSIZE, 0x02); /* reset the rirb hw write pointer */ snd_hdac_chip_writew(bus, RIRBWP, AZX_RIRBWP_RST); /* set N=1, get RIRB response interrupt for new entry */ snd_hdac_chip_writew(bus, RINTCNT, 1); /* enable rirb dma and response irq */ snd_hdac_chip_writeb(bus, RIRBCTL, AZX_RBCTL_DMA_EN | AZX_RBCTL_IRQ_EN); spin_unlock_irq(&bus->reg_lock); } EXPORT_SYMBOL_GPL(snd_hdac_bus_init_cmd_io); /* wait for cmd dmas till they are stopped */ static void hdac_wait_for_cmd_dmas(struct hdac_bus *bus) { unsigned long timeout; timeout = jiffies + msecs_to_jiffies(100); while ((snd_hdac_chip_readb(bus, RIRBCTL) & AZX_RBCTL_DMA_EN) && time_before(jiffies, timeout)) udelay(10); timeout = jiffies + msecs_to_jiffies(100); while ((snd_hdac_chip_readb(bus, CORBCTL) & AZX_CORBCTL_RUN) && time_before(jiffies, timeout)) udelay(10); } /** * snd_hdac_bus_stop_cmd_io - clean up CORB/RIRB buffers * @bus: HD-audio core bus */ void snd_hdac_bus_stop_cmd_io(struct hdac_bus *bus) { spin_lock_irq(&bus->reg_lock); /* disable ringbuffer DMAs */ snd_hdac_chip_writeb(bus, RIRBCTL, 0); snd_hdac_chip_writeb(bus, CORBCTL, 0); hdac_wait_for_cmd_dmas(bus); /* disable unsolicited responses */ snd_hdac_chip_updatel(bus, GCTL, AZX_GCTL_UNSOL, 0); spin_unlock_irq(&bus->reg_lock); } EXPORT_SYMBOL_GPL(snd_hdac_bus_stop_cmd_io); static unsigned int azx_command_addr(u32 cmd) { unsigned int addr = cmd >> 28; if (snd_BUG_ON(addr >= HDA_MAX_CODECS)) addr = 0; return addr; } /** * snd_hdac_bus_send_cmd - send a command verb via CORB * @bus: HD-audio core bus * @val: encoded verb value to send * * Returns zero for success or a negative error code. */ int snd_hdac_bus_send_cmd(struct hdac_bus *bus, unsigned int val) { unsigned int addr = azx_command_addr(val); unsigned int wp, rp; spin_lock_irq(&bus->reg_lock); bus->last_cmd[azx_command_addr(val)] = val; /* add command to corb */ wp = snd_hdac_chip_readw(bus, CORBWP); if (wp == 0xffff) { /* something wrong, controller likely turned to D3 */ spin_unlock_irq(&bus->reg_lock); return -EIO; } wp++; wp %= AZX_MAX_CORB_ENTRIES; rp = snd_hdac_chip_readw(bus, CORBRP); if (wp == rp) { /* oops, it's full */ spin_unlock_irq(&bus->reg_lock); return -EAGAIN; } bus->rirb.cmds[addr]++; bus->corb.buf[wp] = cpu_to_le32(val); snd_hdac_chip_writew(bus, CORBWP, wp); spin_unlock_irq(&bus->reg_lock); return 0; } EXPORT_SYMBOL_GPL(snd_hdac_bus_send_cmd); #define AZX_RIRB_EX_UNSOL_EV (1<<4) /** * snd_hdac_bus_update_rirb - retrieve RIRB entries * @bus: HD-audio core bus * * Usually called from interrupt handler. */ void snd_hdac_bus_update_rirb(struct hdac_bus *bus) { unsigned int rp, wp; unsigned int addr; u32 res, res_ex; wp = snd_hdac_chip_readw(bus, RIRBWP); if (wp == 0xffff) { /* something wrong, controller likely turned to D3 */ return; } if (wp == bus->rirb.wp) return; bus->rirb.wp = wp; while (bus->rirb.rp != wp) { bus->rirb.rp++; bus->rirb.rp %= AZX_MAX_RIRB_ENTRIES; rp = bus->rirb.rp << 1; /* an RIRB entry is 8-bytes */ res_ex = le32_to_cpu(bus->rirb.buf[rp + 1]); res = le32_to_cpu(bus->rirb.buf[rp]); addr = res_ex & 0xf; if (addr >= HDA_MAX_CODECS) { dev_err(bus->dev, "spurious response %#x:%#x, rp = %d, wp = %d", res, res_ex, bus->rirb.rp, wp); snd_BUG(); } else if (res_ex & AZX_RIRB_EX_UNSOL_EV) snd_hdac_bus_queue_event(bus, res, res_ex); else if (bus->rirb.cmds[addr]) { bus->rirb.res[addr] = res; bus->rirb.cmds[addr]--; } else { dev_err_ratelimited(bus->dev, "spurious response %#x:%#x, last cmd=%#08x\n", res, res_ex, bus->last_cmd[addr]); } } } EXPORT_SYMBOL_GPL(snd_hdac_bus_update_rirb); /** * snd_hdac_bus_get_response - receive a response via RIRB * @bus: HD-audio core bus * @addr: codec address * @res: pointer to store the value, NULL when not needed * * Returns zero if a value is read, or a negative error code. */ int snd_hdac_bus_get_response(struct hdac_bus *bus, unsigned int addr, unsigned int *res) { unsigned long timeout; unsigned long loopcounter; timeout = jiffies + msecs_to_jiffies(1000); for (loopcounter = 0;; loopcounter++) { spin_lock_irq(&bus->reg_lock); if (!bus->rirb.cmds[addr]) { if (res) *res = bus->rirb.res[addr]; /* the last value */ spin_unlock_irq(&bus->reg_lock); return 0; } spin_unlock_irq(&bus->reg_lock); if (time_after(jiffies, timeout)) break; if (loopcounter > 3000) msleep(2); /* temporary workaround */ else { udelay(10); cond_resched(); } } return -EIO; } EXPORT_SYMBOL_GPL(snd_hdac_bus_get_response); #define HDAC_MAX_CAPS 10 /** * snd_hdac_bus_parse_capabilities - parse capability structure * @bus: the pointer to bus object * * Returns 0 if successful, or a negative error code. */ int snd_hdac_bus_parse_capabilities(struct hdac_bus *bus) { unsigned int cur_cap; unsigned int offset; unsigned int counter = 0; offset = snd_hdac_chip_readl(bus, LLCH); /* Lets walk the linked capabilities list */ do { cur_cap = _snd_hdac_chip_read(l, bus, offset); dev_dbg(bus->dev, "Capability version: 0x%x\n", (cur_cap & AZX_CAP_HDR_VER_MASK) >> AZX_CAP_HDR_VER_OFF); dev_dbg(bus->dev, "HDA capability ID: 0x%x\n", (cur_cap & AZX_CAP_HDR_ID_MASK) >> AZX_CAP_HDR_ID_OFF); switch ((cur_cap & AZX_CAP_HDR_ID_MASK) >> AZX_CAP_HDR_ID_OFF) { case AZX_ML_CAP_ID: dev_dbg(bus->dev, "Found ML capability\n"); bus->mlcap = bus->remap_addr + offset; break; case AZX_GTS_CAP_ID: dev_dbg(bus->dev, "Found GTS capability offset=%x\n", offset); bus->gtscap = bus->remap_addr + offset; break; case AZX_PP_CAP_ID: /* PP capability found, the Audio DSP is present */ dev_dbg(bus->dev, "Found PP capability offset=%x\n", offset); bus->ppcap = bus->remap_addr + offset; break; case AZX_SPB_CAP_ID: /* SPIB capability found, handler function */ dev_dbg(bus->dev, "Found SPB capability\n"); bus->spbcap = bus->remap_addr + offset; break; case AZX_DRSM_CAP_ID: /* DMA resume capability found, handler function */ dev_dbg(bus->dev, "Found DRSM capability\n"); bus->drsmcap = bus->remap_addr + offset; break; default: dev_dbg(bus->dev, "Unknown capability %d\n", cur_cap); break; } counter++; if (counter > HDAC_MAX_CAPS) { dev_err(bus->dev, "We exceeded HDAC capabilities!!!\n"); break; } /* read the offset of next capability */ offset = cur_cap & AZX_CAP_HDR_NXT_PTR_MASK; } while (offset); return 0; } EXPORT_SYMBOL_GPL(snd_hdac_bus_parse_capabilities); /* * Lowlevel interface */ /** * snd_hdac_bus_enter_link_reset - enter link reset * @bus: HD-audio core bus * * Enter to the link reset state. */ void snd_hdac_bus_enter_link_reset(struct hdac_bus *bus) { unsigned long timeout; /* reset controller */ snd_hdac_chip_updatel(bus, GCTL, AZX_GCTL_RESET, 0); timeout = jiffies + msecs_to_jiffies(100); while ((snd_hdac_chip_readb(bus, GCTL) & AZX_GCTL_RESET) && time_before(jiffies, timeout)) usleep_range(500, 1000); } EXPORT_SYMBOL_GPL(snd_hdac_bus_enter_link_reset); /** * snd_hdac_bus_exit_link_reset - exit link reset * @bus: HD-audio core bus * * Exit from the link reset state. */ void snd_hdac_bus_exit_link_reset(struct hdac_bus *bus) { unsigned long timeout; snd_hdac_chip_updateb(bus, GCTL, 0, AZX_GCTL_RESET); timeout = jiffies + msecs_to_jiffies(100); while (!snd_hdac_chip_readb(bus, GCTL) && time_before(jiffies, timeout)) usleep_range(500, 1000); } EXPORT_SYMBOL_GPL(snd_hdac_bus_exit_link_reset); /* reset codec link */ static int azx_reset(struct hdac_bus *bus, bool full_reset) { if (!full_reset) goto skip_reset; /* clear STATESTS */ snd_hdac_chip_writew(bus, STATESTS, STATESTS_INT_MASK); /* reset controller */ snd_hdac_bus_enter_link_reset(bus); /* delay for >= 100us for codec PLL to settle per spec * Rev 0.9 section 5.5.1 */ usleep_range(500, 1000); /* Bring controller out of reset */ snd_hdac_bus_exit_link_reset(bus); /* Brent Chartrand said to wait >= 540us for codecs to initialize */ usleep_range(1000, 1200); skip_reset: /* check to see if controller is ready */ if (!snd_hdac_chip_readb(bus, GCTL)) { dev_dbg(bus->dev, "azx_reset: controller not ready!\n"); return -EBUSY; } /* Accept unsolicited responses */ snd_hdac_chip_updatel(bus, GCTL, 0, AZX_GCTL_UNSOL); /* detect codecs */ if (!bus->codec_mask) { bus->codec_mask = snd_hdac_chip_readw(bus, STATESTS); dev_dbg(bus->dev, "codec_mask = 0x%lx\n", bus->codec_mask); } return 0; } /* enable interrupts */ static void azx_int_enable(struct hdac_bus *bus) { /* enable controller CIE and GIE */ snd_hdac_chip_updatel(bus, INTCTL, 0, AZX_INT_CTRL_EN | AZX_INT_GLOBAL_EN); } /* disable interrupts */ static void azx_int_disable(struct hdac_bus *bus) { struct hdac_stream *azx_dev; /* disable interrupts in stream descriptor */ list_for_each_entry(azx_dev, &bus->stream_list, list) snd_hdac_stream_updateb(azx_dev, SD_CTL, SD_INT_MASK, 0); /* disable SIE for all streams */ snd_hdac_chip_writeb(bus, INTCTL, 0); /* disable controller CIE and GIE */ snd_hdac_chip_updatel(bus, INTCTL, AZX_INT_CTRL_EN | AZX_INT_GLOBAL_EN, 0); } /* clear interrupts */ static void azx_int_clear(struct hdac_bus *bus) { struct hdac_stream *azx_dev; /* clear stream status */ list_for_each_entry(azx_dev, &bus->stream_list, list) snd_hdac_stream_writeb(azx_dev, SD_STS, SD_INT_MASK); /* clear STATESTS */ snd_hdac_chip_writew(bus, STATESTS, STATESTS_INT_MASK); /* clear rirb status */ snd_hdac_chip_writeb(bus, RIRBSTS, RIRB_INT_MASK); /* clear int status */ snd_hdac_chip_writel(bus, INTSTS, AZX_INT_CTRL_EN | AZX_INT_ALL_STREAM); } /** * snd_hdac_bus_init_chip - reset and start the controller registers * @bus: HD-audio core bus * @full_reset: Do full reset */ bool snd_hdac_bus_init_chip(struct hdac_bus *bus, bool full_reset) { if (bus->chip_init) return false; /* reset controller */ azx_reset(bus, full_reset); /* initialize interrupts */ azx_int_clear(bus); azx_int_enable(bus); /* initialize the codec command I/O */ snd_hdac_bus_init_cmd_io(bus); /* program the position buffer */ if (bus->use_posbuf && bus->posbuf.addr) { snd_hdac_chip_writel(bus, DPLBASE, (u32)bus->posbuf.addr); snd_hdac_chip_writel(bus, DPUBASE, upper_32_bits(bus->posbuf.addr)); } bus->chip_init = true; return true; } EXPORT_SYMBOL_GPL(snd_hdac_bus_init_chip); /** * snd_hdac_bus_stop_chip - disable the whole IRQ and I/Os * @bus: HD-audio core bus */ void snd_hdac_bus_stop_chip(struct hdac_bus *bus) { if (!bus->chip_init) return; /* disable interrupts */ azx_int_disable(bus); azx_int_clear(bus); /* disable CORB/RIRB */ snd_hdac_bus_stop_cmd_io(bus); /* disable position buffer */ if (bus->posbuf.addr) { snd_hdac_chip_writel(bus, DPLBASE, 0); snd_hdac_chip_writel(bus, DPUBASE, 0); } bus->chip_init = false; } EXPORT_SYMBOL_GPL(snd_hdac_bus_stop_chip); /** * snd_hdac_bus_handle_stream_irq - interrupt handler for streams * @bus: HD-audio core bus * @status: INTSTS register value * @ask: callback to be called for woken streams * * Returns the bits of handled streams, or zero if no stream is handled. */ int snd_hdac_bus_handle_stream_irq(struct hdac_bus *bus, unsigned int status, void (*ack)(struct hdac_bus *, struct hdac_stream *)) { struct hdac_stream *azx_dev; u8 sd_status; int handled = 0; list_for_each_entry(azx_dev, &bus->stream_list, list) { if (status & azx_dev->sd_int_sta_mask) { sd_status = snd_hdac_stream_readb(azx_dev, SD_STS); snd_hdac_stream_writeb(azx_dev, SD_STS, SD_INT_MASK); handled |= 1 << azx_dev->index; if (!azx_dev->substream || !azx_dev->running || !(sd_status & SD_INT_COMPLETE)) continue; if (ack) ack(bus, azx_dev); } } return handled; } EXPORT_SYMBOL_GPL(snd_hdac_bus_handle_stream_irq); /** * snd_hdac_bus_alloc_stream_pages - allocate BDL and other buffers * @bus: HD-audio core bus * * Call this after assigning the all streams. * Returns zero for success, or a negative error code. */ int snd_hdac_bus_alloc_stream_pages(struct hdac_bus *bus) { struct hdac_stream *s; int num_streams = 0; int err; list_for_each_entry(s, &bus->stream_list, list) { /* allocate memory for the BDL for each stream */ err = bus->io_ops->dma_alloc_pages(bus, SNDRV_DMA_TYPE_DEV, BDL_SIZE, &s->bdl); num_streams++; if (err < 0) return -ENOMEM; } if (WARN_ON(!num_streams)) return -EINVAL; /* allocate memory for the position buffer */ err = bus->io_ops->dma_alloc_pages(bus, SNDRV_DMA_TYPE_DEV, num_streams * 8, &bus->posbuf); if (err < 0) return -ENOMEM; list_for_each_entry(s, &bus->stream_list, list) s->posbuf = (__le32 *)(bus->posbuf.area + s->index * 8); /* single page (at least 4096 bytes) must suffice for both ringbuffes */ return bus->io_ops->dma_alloc_pages(bus, SNDRV_DMA_TYPE_DEV, PAGE_SIZE, &bus->rb); } EXPORT_SYMBOL_GPL(snd_hdac_bus_alloc_stream_pages); /** * snd_hdac_bus_free_stream_pages - release BDL and other buffers * @bus: HD-audio core bus */ void snd_hdac_bus_free_stream_pages(struct hdac_bus *bus) { struct hdac_stream *s; list_for_each_entry(s, &bus->stream_list, list) { if (s->bdl.area) bus->io_ops->dma_free_pages(bus, &s->bdl); } if (bus->rb.area) bus->io_ops->dma_free_pages(bus, &bus->rb); if (bus->posbuf.area) bus->io_ops->dma_free_pages(bus, &bus->posbuf); } EXPORT_SYMBOL_GPL(snd_hdac_bus_free_stream_pages); ogsubject'>openvswitch: Use inverted tuple in ovs_ct_find_existing() if NATted.Jarno Rajahalme1-2/+22 The conntrack lookup for existing connections fails to invert the packet 5-tuple for NATted packets, and therefore fails to find the existing conntrack entry. Conntrack only stores 5-tuples for incoming packets, and there are various situations where a lookup on a packet that has already been transformed by NAT needs to be made. Looking up an existing conntrack entry upon executing packet received from the userspace is one of them. This patch fixes ovs_ct_find_existing() to invert the packet 5-tuple for the conntrack lookup whenever the packet has already been transformed by conntrack from its input form as evidenced by one of the NAT flags being set in the conntrack state metadata. Fixes: 05752523e565 ("openvswitch: Interface with NAT.") Signed-off-by: Jarno Rajahalme <jarno@ovn.org> Acked-by: Joe Stringer <joe@ovn.org> Acked-by: Pravin B Shelar <pshelar@ovn.org> Signed-off-by: David S. Miller <davem@davemloft.net> 2017-02-09openvswitch: Fix comments for skb->_nfctJarno Rajahalme1-7/+7 Fix comments referring to skb 'nfct' and 'nfctinfo' fields now that they are combined into '_nfct'. Signed-off-by: Jarno Rajahalme <jarno@ovn.org> Acked-by: Pravin B Shelar <pshelar@ovn.org> Acked-by: Joe Stringer <joe@ovn.org> Signed-off-by: David S. Miller <davem@davemloft.net> 2017-02-03Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-nextDavid S. Miller1-7/+5 Pablo Neira Ayuso says: ==================== Netfilter updates for net-next The following patchset contains Netfilter updates for your net-next tree, they are: 1) Stash ctinfo 3-bit field into pointer to nf_conntrack object from sk_buff so we only access one single cacheline in the conntrack hotpath. Patchset from Florian Westphal. 2) Don't leak pointer to internal structures when exporting x_tables ruleset back to userspace, from Willem DeBruijn. This includes new helper functions to copy data to userspace such as xt_data_to_user() as well as conversions of our ip_tables, ip6_tables and arp_tables clients to use it. Not surprinsingly, ebtables requires an ad-hoc update. There is also a new field in x_tables extensions to indicate the amount of bytes that we copy to userspace. 3) Add nf_log_all_netns sysctl: This new knob allows you to enable logging via nf_log infrastructure for all existing netnamespaces. Given the effort to provide pernet syslog has been discontinued, let's provide a way to restore logging using netfilter kernel logging facilities in trusted environments. Patch from Michal Kubecek. 4) Validate SCTP checksum from conntrack helper, from Davide Caratti. 5) Merge UDPlite conntrack and NAT helpers into UDP, this was mostly a copy&paste from the original helper, from Florian Westphal. 6) Reset netfilter state when duplicating packets, also from Florian. 7) Remove unnecessary check for broadcast in IPv6 in pkttype match and nft_meta, from Liping Zhang. 8) Add missing code to deal with loopback packets from nft_meta when used by the netdev family, also from Liping. 9) Several cleanups on nf_tables, one to remove unnecessary check from the netlink control plane path to add table, set and stateful objects and code consolidation when unregister chain hooks, from Gao Feng. 10) Fix harmless reference counter underflow in IPVS that, however, results in problems with the introduction of the new refcount_t type, from David Windsor. 11) Enable LIBCRC32C from nf_ct_sctp instead of nf_nat_sctp, from Davide Caratti. 12) Missing documentation on nf_tables uapi header, from Liping Zhang. 13) Use rb_entry() helper in xt_connlimit, from Geliang Tang. ==================== Signed-off-by: David S. Miller <davem@davemloft.net> 2017-02-02netfilter: add and use nf_ct_set helperFlorian Westphal1-4/+2 Add a helper to assign a nf_conn entry and the ctinfo bits to an sk_buff. This avoids changing code in followup patch that merges skb->nfct and skb->nfctinfo into skb->_nfct. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> 2017-02-02skbuff: add and use skb_nfct helperFlorian Westphal1-3/+3 Followup patch renames skb->nfct and changes its type so add a helper to avoid intrusive rename change later. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>