From: Stephen Hemminger <stephen@networkplumber.org>
To: Santosh Shukla <sshukla@mvista.com>
Cc: dev@dpdk.org, Rizwan Ansari <ransari@mvista.com>
Subject: Re: [dpdk-dev] [PATCH 6/6] virtio: arm/arm64: memory mapped IO support in pmd driver
Date: Mon, 7 Dec 2015 09:08:33 -0800 [thread overview]
Message-ID: <20151207090833.03f65d63@xeon-e3> (raw)
In-Reply-To: <1449250519-28372-7-git-send-email-sshukla@mvista.com>
On Fri, 4 Dec 2015 23:05:19 +0530
Santosh Shukla <sshukla@mvista.com> wrote:
>
> +#ifdef RTE_EXEC_ENV_LINUXAPP
> +/* start address of first pci_iobar slot (user-space virtual-addres) */
> +void *ioport_map;
> +#if defined(RTE_ARCH_ARM) || defined(RTE_ARCH_ARM64)
> +
> +#include <sys/mman.h>
> +#define DEV_NAME "/dev/igb_ioport"
> +
> +/* Keeping pci_ioport_size = 4k.
> + * So maximum mmaped pci_iobar supported =
> + * (ioport_size/pci_dev->mem_resource[0].len)
> + *
> + * note: kernel could allow maximum 32 virtio-net-pci interface, that mean
> + * maximum 32 PCI_IOBAR(s) where each PCI_IOBAR_LEN=0x20, so virtio_map_ioport()
> + * func by theory gonna support 4k/0x20 ==> 128 PCI_IOBAR(s), more than
> + * max-virtio-net-pci interface.
> + */
> +#define PAGE_SIZE 4096
> +#define PCI_IOPORT_SIZE PAGE_SIZE
> +#define PCI_IOPORT_MAX 128 /* 4k / 0x20 */
> +
> +int ioport_map_cnt;
> +#endif /* ARM, ARM64 */
> +#endif /* RTE_EXEC_ENV_LINUXAPP */
These variables should be static.
Also, it is should be possible to extract the I/O bar stuff in a generic way through sysfs
and not depend on a character device. The long term goal for DPDK acceptance is to
eliminate (or at least reduce to a minumum) any requirement for special kernel drivers.
next prev parent reply other threads:[~2015-12-07 17:08 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-04 17:35 [dpdk-dev] [PATCH 0/6] Add virtio support in arm/arm64 Santosh Shukla
2015-12-04 17:35 ` [dpdk-dev] [PATCH 1/6] virtio: Introduce config RTE_VIRTIO_INC_VECTOR Santosh Shukla
2015-12-04 17:35 ` [dpdk-dev] [PATCH 2/6] config: i686: set RTE_VIRTIO_INC_VECTOR=n Santosh Shukla
2015-12-04 17:35 ` [dpdk-dev] [PATCH 3/6] virtio: armv7/v8: Introdice api to emulate x86-style of PCI/ISA ioport access Santosh Shukla
2015-12-07 17:09 ` Stephen Hemminger
2015-12-08 15:35 ` Santosh Shukla
2015-12-04 17:35 ` [dpdk-dev] [PATCH 4/6] config: armv7/v8: Enable RTE_LIBRTE_VIRTIO_PMD Santosh Shukla
2015-12-04 17:35 ` [dpdk-dev] [PATCH 5/6] linuxapp: eal: arm: Always return 0 for rte_eal_iopl_init() Santosh Shukla
2015-12-09 19:58 ` Jan Viktorin
2015-12-04 17:35 ` [dpdk-dev] [PATCH 6/6] virtio: arm/arm64: memory mapped IO support in pmd driver Santosh Shukla
2015-12-07 17:08 ` Stephen Hemminger [this message]
2015-12-08 12:53 ` Santosh Shukla
2015-12-09 18:59 ` Santosh Shukla
2015-12-09 19:04 ` Stephen Hemminger
2015-12-09 19:19 ` Santosh Shukla
2015-12-09 19:57 ` Stephen Hemminger
2015-12-08 9:47 ` Ananyev, Konstantin
2015-12-08 12:55 ` Santosh Shukla
2015-12-07 2:12 ` [dpdk-dev] [PATCH 0/6] Add virtio support in arm/arm64 Yuanhan Liu
2015-12-08 12:59 ` Xie, Huawei
2015-12-10 6:16 ` Santosh Shukla
2015-12-10 6:31 ` Yuanhan Liu
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