From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 333A8A04B5; Wed, 30 Sep 2020 17:00:33 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 488D91D58E; Wed, 30 Sep 2020 17:00:31 +0200 (CEST) Received: from out0-129.mail.aliyun.com (out0-129.mail.aliyun.com [140.205.0.129]) by dpdk.org (Postfix) with ESMTP id 6DF051D584 for ; Wed, 30 Sep 2020 17:00:10 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alibaba-inc.com; s=default; t=1601478008; h=To:From:Subject:Message-ID:Date:MIME-Version:Content-Type; bh=93ReWGwvt6L8wb6JjgulxwKsQ/z3WLqutihHXSK1ACI=; b=KNSVXlY+5s5qSZfEZr56lmVyHnA4bj/ygIB7PygKik8CyJ9IOxxr8xDNJtoHnnq7tkZHkF9EcMYLr6kNSJOqMvm+MgfpIech4eOAQ3+z/vixvuGZbd7lrOQoxwkuPNLCTvmErRqh0dX6uu6NXyloHOLau3EepaXrjbNo47d2zK4= X-Alimail-AntiSpam: AC=PASS; BC=-1|-1; BR=01201311R111e4; CH=green; DM=||false|; DS=||; FP=0|-1|-1|-1|0|-1|-1|-1; HT=ay29a033018047192; MF=huawei.xhw@alibaba-inc.com; NM=1; PH=DS; RN=9; SR=0; TI=SMTPD_---.Ie6KINh_1601478005; Received: from 30.15.211.105(mailfrom:huawei.xhw@alibaba-inc.com fp:SMTPD_---.Ie6KINh_1601478005) by smtp.aliyun-inc.com(127.0.0.1); Wed, 30 Sep 2020 23:00:06 +0800 To: dev , "ferruh.yigit" Cc: "Maxime Coquelin" , "Anatoly Burakov" , "David Marchand" , "=?UTF-8?B?V2FuZywgWmhpaG9uZw==?=" , "=?UTF-8?B?WGlhLCBDaGVuYm8=?=" , "Gaetan Rivet" , "=?UTF-8?B?5p2o6IiqKOihjOWuqik=?=" From: "=?UTF-8?B?6LCi5Y2O5LyfKOatpOaXtuatpOWIu++8iQ==?=" x-aliyun-hidden-reply-to: 19840b6a-b08f-4877-a530-15ced259bedf.huawei.xhw@alibaba-inc.com Message-ID: <68ecd941-9c56-4de7-fae2-2ad15bdfd81a@alibaba-inc.com> Date: Wed, 30 Sep 2020 22:59:48 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.3.1 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US Subject: [dpdk-dev] [PATCH v2] pci: support both PIO and MMIO BAR for legacy virtio on x86 X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" From c13f981e287254cd0877cc7b98ee2dd7b80c3b69 Mon Sep 17 00:00:00 2001 From: "huawei.xhw" Date: Wed, 30 Sep 2020 22:37:03 +0800 Subject: [PATCH v2] pci:  support both PIO and MMIO BAR for legacy virtio on  x86 Legacy virtio-pci only supports PIO BAR resource. As we need to create lots of virtio devices and PIO resource on x86 is very limited, we expose MMIO BAR. Kernel supports both PIO  and MMIO BAR for legacy virtio-pci device. We handles different type of BAR in the similar way. In previous implementation, with igb_uio we get PIO address from igb_uio sysfs entry; with uio_pci_generic, we get PIO address from /proc/ioports. For PIO/MMIO RW, there is different path for different drivers and arch. For VFIO, PIO/MMIO RW is through syscall, which has big performance issue. On X86, it assumes only PIO is supported. All of the above is too much twisted. This patch unifies the way to get both PIO and MMIO address for different driver and arch, all from standard resource attr under pci sysfs. We distinguish PIO and MMIO by their address like how kernel does. It is ugly but works. Signed-off-by: huawei.xhw ---  drivers/bus/pci/linux/pci.c     |  89 +--------------------  drivers/bus/pci/linux/pci_uio.c | 166 +++++++++++++++++++++++++++-------------  2 files changed, 118 insertions(+), 137 deletions(-) diff --git a/drivers/bus/pci/linux/pci.c b/drivers/bus/pci/linux/pci.c index bf27594..885e54e 100644 --- a/drivers/bus/pci/linux/pci.c +++ b/drivers/bus/pci/linux/pci.c @@ -687,71 +687,6 @@ int rte_pci_write_config(const struct rte_pci_device *device,      }  } -#if defined(RTE_ARCH_X86) -static int -pci_ioport_map(struct rte_pci_device *dev, int bar __rte_unused, -        struct rte_pci_ioport *p) -{ -    uint16_t start, end; -    FILE *fp; -    char *line = NULL; -    char pci_id[16]; -    int found = 0; -    size_t linesz; - -    if (rte_eal_iopl_init() != 0) { -        RTE_LOG(ERR, EAL, "%s(): insufficient ioport permissions for PCI device %s\n", -            __func__, dev->name); -        return -1; -    } - -    snprintf(pci_id, sizeof(pci_id), PCI_PRI_FMT, -         dev->addr.domain, dev->addr.bus, -         dev->addr.devid, dev->addr.function); - -    fp = fopen("/proc/ioports", "r"); -    if (fp == NULL) { -        RTE_LOG(ERR, EAL, "%s(): can't open ioports\n", __func__); -        return -1; -    } - -    while (getdelim(&line, &linesz, '\n', fp) > 0) { -        char *ptr = line; -        char *left; -        int n; - -        n = strcspn(ptr, ":"); -        ptr[n] = 0; -        left = &ptr[n + 1]; - -        while (*left && isspace(*left)) -            left++; - -        if (!strncmp(left, pci_id, strlen(pci_id))) { -            found = 1; - -            while (*ptr && isspace(*ptr)) -                ptr++; - -            sscanf(ptr, "%04hx-%04hx", &start, &end); - -            break; -        } -    } - -    free(line); -    fclose(fp); - -    if (!found) -        return -1; - -    p->base = start; -    RTE_LOG(DEBUG, EAL, "PCI Port IO found start=0x%x\n", start); - -    return 0; -} -#endif -  int  rte_pci_ioport_map(struct rte_pci_device *dev, int bar,          struct rte_pci_ioport *p) @@ -762,18 +697,12 @@ int rte_pci_write_config(const struct rte_pci_device *device,  #ifdef VFIO_PRESENT      case RTE_PCI_KDRV_VFIO:          if (pci_vfio_is_enabled()) -            ret = pci_vfio_ioport_map(dev, bar, p); +            ret = pci_uio_ioport_map(dev, bar, p);          break;  #endif      case RTE_PCI_KDRV_IGB_UIO: -        ret = pci_uio_ioport_map(dev, bar, p); -        break;      case RTE_PCI_KDRV_UIO_GENERIC: -#if defined(RTE_ARCH_X86) -        ret = pci_ioport_map(dev, bar, p); -#else          ret = pci_uio_ioport_map(dev, bar, p); -#endif          break;      default:          break; @@ -792,12 +721,10 @@ int rte_pci_write_config(const struct rte_pci_device *device,      switch (p->dev->kdrv) {  #ifdef VFIO_PRESENT      case RTE_PCI_KDRV_VFIO: -        pci_vfio_ioport_read(p, data, len, offset); +        pci_uio_ioport_read(p, data, len, offset);          break;  #endif      case RTE_PCI_KDRV_IGB_UIO: -        pci_uio_ioport_read(p, data, len, offset); -        break;      case RTE_PCI_KDRV_UIO_GENERIC:          pci_uio_ioport_read(p, data, len, offset);          break; @@ -813,12 +740,10 @@ int rte_pci_write_config(const struct rte_pci_device *device,      switch (p->dev->kdrv) {  #ifdef VFIO_PRESENT      case RTE_PCI_KDRV_VFIO: -        pci_vfio_ioport_write(p, data, len, offset); +        pci_uio_ioport_write(p, data, len, offset);          break;  #endif      case RTE_PCI_KDRV_IGB_UIO: -        pci_uio_ioport_write(p, data, len, offset); -        break;      case RTE_PCI_KDRV_UIO_GENERIC:          pci_uio_ioport_write(p, data, len, offset);          break; @@ -836,18 +761,12 @@ int rte_pci_write_config(const struct rte_pci_device *device,  #ifdef VFIO_PRESENT      case RTE_PCI_KDRV_VFIO:          if (pci_vfio_is_enabled()) -            ret = pci_vfio_ioport_unmap(p); +            ret = pci_uio_ioport_unmap(p);          break;  #endif      case RTE_PCI_KDRV_IGB_UIO: -        ret = pci_uio_ioport_unmap(p); -        break;      case RTE_PCI_KDRV_UIO_GENERIC: -#if defined(RTE_ARCH_X86) -        ret = 0; -#else          ret = pci_uio_ioport_unmap(p); -#endif          break;      default:          break; diff --git a/drivers/bus/pci/linux/pci_uio.c b/drivers/bus/pci/linux/pci_uio.c index f3305a2..cf49e8f 100644 --- a/drivers/bus/pci/linux/pci_uio.c +++ b/drivers/bus/pci/linux/pci_uio.c @@ -373,52 +373,83 @@  pci_uio_ioport_map(struct rte_pci_device *dev, int bar,             struct rte_pci_ioport *p)  { +    FILE *f = NULL;      char dirname[PATH_MAX];      char filename[PATH_MAX]; +    char buf[BUFSIZ]; +    uint64_t phys_addr, end_addr, flags;      int uio_num; -    unsigned long start; +    unsigned long base; +    bool iobar; +    int i; -    if (rte_eal_iopl_init() != 0) { -        RTE_LOG(ERR, EAL, "%s(): insufficient ioport permissions for PCI device %s\n", -            __func__, dev->name); +    /* open and read addresses of the corresponding resource in sysfs */ +    snprintf(filename, sizeof(filename), "%s/" PCI_PRI_FMT "/resource", +        rte_pci_get_sysfs_path(), dev->addr.domain, dev->addr.bus, +        dev->addr.devid, dev->addr.function); +    f = fopen(filename, "r"); +    if (f == NULL) { +        RTE_LOG(ERR, EAL, "Cannot open sysfs resource: %s\n", +            strerror(errno));          return -1;      } -    uio_num = pci_get_uio_dev(dev, dirname, sizeof(dirname), 0); -    if (uio_num < 0) -        return -1; +    for (i = 0; i < bar + 1; i++) { +        if (fgets(buf, sizeof(buf), f) == NULL) { +            RTE_LOG(ERR, EAL, "Cannot read sysfs resource\n"); +            goto error; +        } +    } +    if (pci_parse_one_sysfs_resource(buf, sizeof(buf), &phys_addr, +        &end_addr, &flags) < 0) +        goto error; -    /* get portio start */ -    snprintf(filename, sizeof(filename), -         "%s/portio/port%d/start", dirname, bar); -    if (eal_parse_sysfs_value(filename, &start) < 0) { -        RTE_LOG(ERR, EAL, "%s(): cannot parse portio start\n", -            __func__); -        return -1; +    if (flags & IORESOURCE_IO) { +        iobar = 1; +        base = (unsigned long)phys_addr; +        RTE_LOG(INFO, EAL, "%s(): PIO BAR %08lx detected\n", __func__, base); +    } else if (flags & IORESOURCE_MEM) { +        iobar = 0; +        base = (unsigned long)dev->mem_resource[bar].addr; +        RTE_LOG(INFO, EAL, "%s(): MMIO BAR %08lx detected\n", __func__, base); +    } else { +        RTE_LOG(ERR, EAL, "%s(): unknown BAR type\n", __func__); +        goto error; +    } + +    if (iobar && rte_eal_iopl_init() != 0) { +        RTE_LOG(ERR, EAL, "%s(): insufficient ioport permissions for PCI device %s\n", +            __func__, dev->name); +        goto error;      } -    /* ensure we don't get anything funny here, read/write will cast to -     * uin16_t */ -    if (start > UINT16_MAX) -        return -1;      /* FIXME only for primary process ? */ -    if (dev->intr_handle.type == RTE_INTR_HANDLE_UNKNOWN) { +    if (dev->intr_handle.type == RTE_INTR_HANDLE_UNKNOWN && +        dev->kdrv == RTE_KDRV_UIO_GENERIC) { +        uio_num = pci_get_uio_dev(dev, dirname, sizeof(dirname), 0); +        if (uio_num < 0) +            goto error;          snprintf(filename, sizeof(filename), "/dev/uio%u", uio_num);          dev->intr_handle.fd = open(filename, O_RDWR);          if (dev->intr_handle.fd < 0) {              RTE_LOG(ERR, EAL, "Cannot open %s: %s\n",                  filename, strerror(errno)); -            return -1; +            goto error;          }          dev->intr_handle.type = RTE_INTR_HANDLE_UIO;      } -    RTE_LOG(DEBUG, EAL, "PCI Port IO found start=0x%lx\n", start); +    RTE_LOG(DEBUG, EAL, "PCI IO port found start=0x%lx\n", base); -    p->base = start; +    p->base = base;      p->len = 0; +    fclose(f);      return 0; +error: +    if (f) +        fclose(f); +    return -1;  }  #else  int @@ -489,6 +520,61 @@  }  #endif +#define PIO_MAX 0x10000 +static inline uint8_t ioread8(void *addr) +{ +    uint8_t val; + +    val = (uint64_t)(uintptr_t)addr >= PIO_MAX ? +        *(volatile uint8_t *)addr : +        inb((unsigned long)addr); + +    return val; +} + +static inline uint16_t ioread16(void *addr) +{ +    uint16_t val; + +    val = (uint64_t)(uintptr_t)addr >= PIO_MAX ? +        *(volatile uint16_t *)addr : +        inw((unsigned long)addr); + +    return val; +} + +static inline uint32_t ioread32(void *addr) +{ +    uint32_t val; + +    val = (uint64_t)(uintptr_t)addr >= PIO_MAX ? +        *(volatile uint32_t *)addr : +    inl((unsigned long)addr); + +    return val; +} + +static inline void iowrite8(uint8_t val, void *addr) +{ +    (uint64_t)(uintptr_t)addr >= PIO_MAX ? +        *(volatile uint8_t *)addr = val : +        outb(val, (unsigned long)addr); +} + +static inline void iowrite16(uint16_t val, void *addr) +{ +    (uint64_t)(uintptr_t)addr >= PIO_MAX ? +        *(volatile uint16_t *)addr = val : +        outw(val, (unsigned long)addr); +} + +static inline void iowrite32(uint32_t val, void *addr) +{ +    (uint64_t)(uintptr_t)addr >= PIO_MAX ? +        *(volatile uint32_t *)addr = val : +        outl(val, (unsigned long)addr); +} +  void  pci_uio_ioport_read(struct rte_pci_ioport *p,              void *data, size_t len, off_t offset) @@ -500,25 +586,13 @@      for (d = data; len > 0; d += size, reg += size, len -= size) {          if (len >= 4) {              size = 4; -#if defined(RTE_ARCH_X86) -            *(uint32_t *)d = inl(reg); -#else -            *(uint32_t *)d = *(volatile uint32_t *)reg; -#endif +            *(uint32_t *)d = ioread32((void *)reg);          } else if (len >= 2) {              size = 2; -#if defined(RTE_ARCH_X86) -            *(uint16_t *)d = inw(reg); -#else -            *(uint16_t *)d = *(volatile uint16_t *)reg; -#endif +            *(uint16_t *)d = ioread16((void *)reg);          } else {              size = 1; -#if defined(RTE_ARCH_X86) -            *d = inb(reg); -#else -            *d = *(volatile uint8_t *)reg; -#endif +            *d = ioread8((void *)reg);          }      }  } @@ -534,25 +608,13 @@      for (s = data; len > 0; s += size, reg += size, len -= size) {          if (len >= 4) {              size = 4; -#if defined(RTE_ARCH_X86) -            outl_p(*(const uint32_t *)s, reg); -#else -            *(volatile uint32_t *)reg = *(const uint32_t *)s; -#endif +            iowrite32(*(const uint32_t *)s, (void *)reg);          } else if (len >= 2) {              size = 2; -#if defined(RTE_ARCH_X86) -            outw_p(*(const uint16_t *)s, reg); -#else -            *(volatile uint16_t *)reg = *(const uint16_t *)s; -#endif +            iowrite16(*(const uint16_t *)s, (void *)reg);          } else {              size = 1; -#if defined(RTE_ARCH_X86) -            outb_p(*s, reg); -#else -            *(volatile uint8_t *)reg = *s; -#endif +            iowrite8(*s, (void *)reg);          }      }  } -- 1.8.3.1