From: "Xie, Huawei" <huawei.xie@intel.com>
To: Yuanhan Liu <yuanhan.liu@linux.intel.com>, "dev@dpdk.org" <dev@dpdk.org>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Subject: Re: [dpdk-dev] [PATCH v2 7/7] virtio: add 1.0 support
Date: Thu, 14 Jan 2016 07:50:00 +0000 [thread overview]
Message-ID: <C37D651A908B024F974696C65296B57B4C58E516@SHSMSX101.ccr.corp.intel.com> (raw)
In-Reply-To: <1452581944-24838-8-git-send-email-yuanhan.liu@linux.intel.com>
On 1/12/2016 2:58 PM, Yuanhan Liu wrote:
> Modern (v1.0) virtio pci device defines several pci capabilities.
> Each cap has a configure structure corresponding to it, and the
> cap.bar and cap.offset fields tell us where to find it.
>
> Firstly, we map the pci resources by rte_eal_pci_map_device().
> We then could easily locate to a cfg structure by:
s/Locate/Locate to/
>
> cfg_addr = dev->mem_resources[cap.bar].addr + cap.offset;
>
> Therefore, the entrance of enabling modern (v1.0) pci device support
> is to iterate the pci capability lists, and to locate some configs
> we care; and they are:
>
> - common cfg
>
> For generic virtio and virtuqueu configuration, such as setting/getting
typo for virtqueue
> features, enabling a specific queue, and so on.
>
> - nofity cfg
>
> Combining with `queue_notify_off' from common cfg, we could use it to
> notify a specific virt queue.
>
> - device cfg
>
> Where virtio_net_config structure locates.
is located
> If any of above cap is not found, we fallback to the legacy virtio
>
[SNIP]
>
>
>
> +#define MODERN_READ_DEF(nr_bits, type) \
> +static inline type \
> +modern_read##nr_bits(type *addr) \
> +{ \
> + return *(volatile type *)addr; \
> +}
> +
> +#define MODERN_WRITE_DEF(nr_bits, type) \
> +static inline void \
> +modern_write##nr_bits(type val, type *addr) \
> +{ \
> + *(volatile type *)addr = val; \
> +}
> +
> +MODERN_READ_DEF (8, uint8_t)
> +MODERN_WRITE_DEF(8, uint8_t)
> +
> +MODERN_READ_DEF (16, uint16_t)
> +MODERN_WRITE_DEF(16, uint16_t)
> +
> +MODERN_READ_DEF (32, uint32_t)
> +MODERN_WRITE_DEF(32, uint32_t)
> +
> +static inline void
> +modern_write64_twopart(uint64_t val, uint32_t *lo, uint32_t *hi)
> +{
> + modern_write32((uint32_t)val, lo);
> + modern_write32(val >> 32, hi);
> +}
> +
This is normal mmio read/write operation. ioread8/16/32/64 or just
readxx is more meaningful name here.
> +static void
[SNIP]
> +
> +static void
> +modern_write_dev_config(struct virtio_hw *hw, uint64_t offset,
> + void *src, int length)
define src as const
[snip]
>
> +static inline void *
> +get_cfg_addr(struct rte_pci_device *dev, struct virtio_pci_cap *cap)
No explicit inline for non performance critical functions.
> +{
> + uint8_t bar = cap->bar;
> + uint32_t length = cap->length;
> + uint32_t offset = cap->offset;
> + uint8_t *base;
> +
> + if (unlikely(bar > 5)) {
Don't use constant value number whenever possible
No likely/unlikely for non performance critical functions
> + PMD_INIT_LOG(ERR, "invalid bar: %u", bar);
> + return NULL;
> + }
> +
> + if (unlikely(offset + length > dev->mem_resource[bar].len)) {
> + PMD_INIT_LOG(ERR,
> + "invalid cap: overflows bar space: %u > %"PRIu64,
> + offset + length, dev->mem_resource[bar].len);
> + return NULL;
> + }
> +
> + base = dev->mem_resource[bar].addr;
> + if (unlikely(base == NULL)) {
> + PMD_INIT_LOG(ERR, "bar %u base addr is NULL", bar);
> + return NULL;
> + }
> +
> + return base + offset;
> +}
> +
> +static int
> +virtio_read_caps(struct rte_pci_device *dev, struct virtio_hw *hw)
> +{
> + uint8_t pos;
> + struct virtio_pci_cap cap;
> + int ret;
> +
> + if (rte_eal_pci_map_device(dev) < 0) {
> + PMD_INIT_LOG(DEBUG, "failed to map pci device!");
s /DEBUG/ERR/
> + return -1;
> + }
> +
> + ret = rte_eal_pci_read_config(dev, &pos, 1, PCI_CAPABILITY_LIST);
> +
[snip]
next prev parent reply other threads:[~2016-01-14 7:50 UTC|newest]
Thread overview: 122+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-10 3:54 [dpdk-dev] [PATCH 0/6 for 2.3] initial virtio 1.0 enabling Yuanhan Liu
2015-12-10 3:54 ` [dpdk-dev] [PATCH 1/6] virtio: don't set vring address again at queue startup Yuanhan Liu
2015-12-10 3:54 ` [dpdk-dev] [PATCH 2/6] virtio: introduce struct virtio_pci_ops Yuanhan Liu
2015-12-29 11:31 ` Tan, Jianfeng
2015-12-30 3:45 ` Yuanhan Liu
2015-12-10 3:54 ` [dpdk-dev] [PATCH 3/6] virtio: move left pci stuff to virtio_pci.c Yuanhan Liu
2015-12-10 3:54 ` [dpdk-dev] [PATCH 4/6] viritio: switch to 64 bit features Yuanhan Liu
2015-12-10 3:54 ` [dpdk-dev] [PATCH 5/6] virtio: set RTE_PCI_DRV_NEED_MAPPING flag Yuanhan Liu
2015-12-10 3:54 ` [dpdk-dev] [PATCH 6/6] virtio: add virtio v1.0 support Yuanhan Liu
2015-12-29 11:39 ` Tan, Jianfeng
2015-12-30 3:40 ` Yuanhan Liu
2015-12-10 3:58 ` [dpdk-dev] [PATCH 0/6 for 2.3] initial virtio 1.0 enabling Yuanhan Liu
2015-12-29 11:19 ` Tan, Jianfeng
2015-12-30 3:53 ` Yuanhan Liu
2016-01-04 3:55 ` Xu, Qian Q
2016-01-04 4:16 ` Yuanhan Liu
2016-01-12 6:58 ` [dpdk-dev] [PATCH v2 0/7] virtio 1.0 enabling for virtio pmd driver Yuanhan Liu
2016-01-12 6:58 ` [dpdk-dev] [PATCH v2 1/7] virtio: don't set vring address again at queue startup Yuanhan Liu
2016-01-12 6:58 ` [dpdk-dev] [PATCH v2 2/7] virtio: introduce struct virtio_pci_ops Yuanhan Liu
2016-01-12 6:59 ` [dpdk-dev] [PATCH v2 3/7] virtio: move left pci stuff to virtio_pci.c Yuanhan Liu
2016-01-12 6:59 ` [dpdk-dev] [PATCH v2 4/7] viritio: switch to 64 bit features Yuanhan Liu
2016-01-12 6:59 ` [dpdk-dev] [PATCH v2 5/7] virtio: retrieve hdr_size from hw->vtnet_hdr_size Yuanhan Liu
2016-01-12 6:59 ` [dpdk-dev] [PATCH v2 6/7] eal: pci: export pci_map_device Yuanhan Liu
2016-01-12 8:31 ` David Marchand
2016-01-12 8:40 ` Yuanhan Liu
2016-01-12 9:05 ` Yuanhan Liu
2016-01-13 14:44 ` Santosh Shukla
2016-01-12 6:59 ` [dpdk-dev] [PATCH v2 7/7] virtio: add 1.0 support Yuanhan Liu
2016-01-13 3:31 ` Tetsuya Mukawa
2016-01-13 9:38 ` Yuanhan Liu
2016-01-14 7:47 ` Xie, Huawei
2016-01-14 7:50 ` Yuanhan Liu
2016-01-14 7:51 ` Xie, Huawei
2016-01-14 7:58 ` Yuanhan Liu
2016-01-14 8:08 ` Xie, Huawei
2016-01-14 8:22 ` Yuanhan Liu
2016-01-14 8:28 ` Xie, Huawei
2016-01-14 7:50 ` Xie, Huawei [this message]
2016-01-14 8:38 ` Yuanhan Liu
2016-01-12 7:07 ` [dpdk-dev] [PATCH v2 0/7] virtio 1.0 enabling for virtio pmd driver Yuanhan Liu
2016-01-14 4:27 ` Tetsuya Mukawa
2016-01-14 5:59 ` Yuanhan Liu
2016-01-14 6:09 ` Tan, Jianfeng
2016-01-14 6:41 ` Tetsuya Mukawa
2016-01-18 9:04 ` Tetsuya Mukawa
2016-01-14 6:45 ` Yuanhan Liu
2016-01-14 7:42 ` [dpdk-dev] [PATCH v3 0/8] " Yuanhan Liu
2016-01-14 7:42 ` [dpdk-dev] [PATCH v3 1/8] virtio: don't set vring address again at queue startup Yuanhan Liu
2016-01-14 7:42 ` [dpdk-dev] [PATCH v3 2/8] virtio: introduce struct virtio_pci_ops Yuanhan Liu
2016-01-14 7:42 ` [dpdk-dev] [PATCH v3 3/8] virtio: move left pci stuff to virtio_pci.c Yuanhan Liu
2016-01-14 7:42 ` [dpdk-dev] [PATCH v3 4/8] viritio: switch to 64 bit features Yuanhan Liu
2016-01-14 7:42 ` [dpdk-dev] [PATCH v3 5/8] virtio: retrieve hdr_size from hw->vtnet_hdr_size Yuanhan Liu
2016-01-14 7:42 ` [dpdk-dev] [PATCH v3 6/8] eal: pci: export pci_[un]map_device Yuanhan Liu
2016-01-14 7:45 ` Yuanhan Liu
2016-01-14 7:42 ` [dpdk-dev] [PATCH v3 7/8] virtio: add 1.0 support Yuanhan Liu
2016-01-14 7:42 ` [dpdk-dev] [PATCH v3 8/8] virtio: move VIRTIO_READ/WRITE_REG_X into virtio_pci.c Yuanhan Liu
2016-01-16 10:08 ` Santosh Shukla
2016-01-17 14:07 ` Santosh Shukla
2016-01-15 4:36 ` [dpdk-dev] [PATCH v4 0/8] virtio 1.0 enabling for virtio pmd driver Yuanhan Liu
2016-01-15 4:36 ` [dpdk-dev] [PATCH v4 1/8] virtio: don't set vring address again at queue startup Yuanhan Liu
2016-01-15 4:36 ` [dpdk-dev] [PATCH v4 2/8] virtio: introduce struct virtio_pci_ops Yuanhan Liu
2016-01-18 17:21 ` Xie, Huawei
2016-01-15 4:36 ` [dpdk-dev] [PATCH v4 3/8] virtio: move left pci stuff to virtio_pci.c Yuanhan Liu
2016-01-15 4:36 ` [dpdk-dev] [PATCH v4 4/8] viritio: switch to 64 bit features Yuanhan Liu
2016-01-15 4:36 ` [dpdk-dev] [PATCH v4 5/8] virtio: retrieve hdr_size from hw->vtnet_hdr_size Yuanhan Liu
2016-01-15 4:36 ` [dpdk-dev] [PATCH v4 6/8] eal: pci: export pci_[un]map_device Yuanhan Liu
2016-01-15 4:36 ` [dpdk-dev] [PATCH v4 7/8] virtio: add 1.0 support Yuanhan Liu
2016-01-18 16:38 ` Xie, Huawei
2016-01-18 16:50 ` Xie, Huawei
2016-01-19 5:55 ` Yuanhan Liu
2016-01-19 7:44 ` Xie, Huawei
2016-01-19 7:54 ` Yuanhan Liu
2016-01-19 8:02 ` Xie, Huawei
2016-01-18 17:07 ` Xie, Huawei
2016-01-19 1:36 ` Yuanhan Liu
2016-01-19 1:51 ` Xie, Huawei
2016-01-19 2:46 ` Yuanhan Liu
2016-01-19 2:48 ` Xie, Huawei
2016-01-19 5:54 ` Yuanhan Liu
2016-01-15 4:36 ` [dpdk-dev] [PATCH v4 8/8] virtio: move VIRTIO_READ/WRITE_REG_X into virtio_pci.c Yuanhan Liu
2016-01-15 8:57 ` Xu, Qian Q
2016-01-18 8:04 ` [dpdk-dev] [PATCH v4 0/8] virtio 1.0 enabling for virtio pmd driver Tetsuya Mukawa
2016-01-19 8:11 ` [dpdk-dev] [PATCH v5 0/9] " Yuanhan Liu
2016-01-19 8:11 ` [dpdk-dev] [PATCH v5 1/9] virtio: don't set vring address again at queue startup Yuanhan Liu
2016-01-19 8:11 ` [dpdk-dev] [PATCH v5 2/9] virtio: define offset as size_t type Yuanhan Liu
2016-01-19 8:11 ` [dpdk-dev] [PATCH v5 3/9] virtio: introduce struct virtio_pci_ops Yuanhan Liu
2016-01-19 8:12 ` [dpdk-dev] [PATCH v5 4/9] virtio: move left pci stuff to virtio_pci.c Yuanhan Liu
2016-01-19 8:12 ` [dpdk-dev] [PATCH v5 5/9] viritio: switch to 64 bit features Yuanhan Liu
2016-01-19 8:12 ` [dpdk-dev] [PATCH v5 6/9] virtio: retrieve hdr_size from hw->vtnet_hdr_size Yuanhan Liu
2016-01-19 8:12 ` [dpdk-dev] [PATCH v5 7/9] eal: pci: export pci_[un]map_device Yuanhan Liu
2016-01-19 8:17 ` David Marchand
2016-01-19 8:12 ` [dpdk-dev] [PATCH v5 8/9] virtio: add 1.0 support Yuanhan Liu
2016-01-21 11:37 ` Thomas Monjalon
2016-01-27 3:49 ` Yuanhan Liu
2016-01-21 11:49 ` Thomas Monjalon
2016-01-27 3:46 ` Yuanhan Liu
2016-01-27 8:11 ` Thomas Monjalon
2016-01-19 8:12 ` [dpdk-dev] [PATCH v5 9/9] virtio: move VIRTIO_READ/WRITE_REG_X into virtio_pci.c Yuanhan Liu
2016-01-19 8:55 ` [dpdk-dev] [PATCH v5 0/9] virtio 1.0 enabling for virtio pmd driver Xie, Huawei
2016-01-28 7:54 ` [dpdk-dev] [PATCH v6 " Yuanhan Liu
2016-01-28 7:54 ` [dpdk-dev] [PATCH v6 1/9] virtio: don't set vring address again at queue startup Yuanhan Liu
2016-01-28 7:54 ` [dpdk-dev] [PATCH v6 2/9] virtio: define offset as size_t type Yuanhan Liu
2016-01-28 7:54 ` [dpdk-dev] [PATCH v6 3/9] virtio: introduce struct virtio_pci_ops Yuanhan Liu
2016-01-28 7:54 ` [dpdk-dev] [PATCH v6 4/9] virtio: move left pci stuff to virtio_pci.c Yuanhan Liu
2016-01-28 7:54 ` [dpdk-dev] [PATCH v6 5/9] viritio: switch to 64 bit features Yuanhan Liu
2016-01-28 7:54 ` [dpdk-dev] [PATCH v6 6/9] virtio: retrieve hdr_size from hw->vtnet_hdr_size Yuanhan Liu
2016-01-28 7:54 ` [dpdk-dev] [PATCH v6 7/9] eal: pci: export pci_[un]map_device Yuanhan Liu
2016-01-28 7:54 ` [dpdk-dev] [PATCH v6 8/9] virtio: add 1.0 support Yuanhan Liu
2016-01-28 7:54 ` [dpdk-dev] [PATCH v6 9/9] virtio: move VIRTIO_READ/WRITE_REG_X into virtio_pci.c Yuanhan Liu
2016-02-02 10:46 ` [dpdk-dev] [PATCH v6 0/9] virtio 1.0 enabling for virtio pmd driver Thomas Monjalon
2016-02-02 13:00 ` Yuanhan Liu
2016-02-02 13:48 ` [dpdk-dev] [PATCH v7 " Yuanhan Liu
2016-02-02 13:48 ` [dpdk-dev] [PATCH v7 1/9] virtio: don't set vring address again at queue startup Yuanhan Liu
2016-02-02 13:48 ` [dpdk-dev] [PATCH v7 2/9] virtio: define offset as size_t type Yuanhan Liu
2016-02-02 13:48 ` [dpdk-dev] [PATCH v7 3/9] virtio: introduce struct virtio_pci_ops Yuanhan Liu
2016-02-02 13:48 ` [dpdk-dev] [PATCH v7 4/9] virtio: move left pci stuff to virtio_pci.c Yuanhan Liu
2016-02-02 13:48 ` [dpdk-dev] [PATCH v7 5/9] viritio: switch to 64 bit features Yuanhan Liu
2016-02-02 13:48 ` [dpdk-dev] [PATCH v7 6/9] virtio: retrieve hdr_size from hw->vtnet_hdr_size Yuanhan Liu
2016-02-02 13:48 ` [dpdk-dev] [PATCH v7 7/9] eal: pci: export pci_[un]map_device Yuanhan Liu
2016-02-02 13:48 ` [dpdk-dev] [PATCH v7 8/9] virtio: add 1.0 support Yuanhan Liu
2016-02-02 13:48 ` [dpdk-dev] [PATCH v7 9/9] virtio: move VIRTIO_READ/WRITE_REG_X into virtio_pci.c Yuanhan Liu
2016-02-03 15:09 ` [dpdk-dev] [PATCH v7 0/9] virtio 1.0 enabling for virtio pmd driver Thomas Monjalon
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