On 08.06.20 12:42, [email protected] wrote:
> From: Nikhil Devshatwar <[email protected]>
>
> Number of peers available on a platform is different.
> Do not hard code the target peer_id used for interrupt.
> Parse this from the command line argument.
>
> This de-couples the dependency between number of peers.
> ivshmem-demo can be run to communicate with desired target
>
> Signed-off-by: Nikhil Devshatwar <[email protected]>
> ---
> tools/ivshmem-demo.c | 12 +++++++-----
> 1 file changed, 7 insertions(+), 5 deletions(-)
>
> diff --git a/tools/ivshmem-demo.c b/tools/ivshmem-demo.c
> index 163653e1..98d24111 100644
> --- a/tools/ivshmem-demo.c
> +++ b/tools/ivshmem-demo.c
> @@ -91,10 +91,11 @@ int main(int argc, char *argv[])
>
> pgsize = getpagesize();
>
> - if (argc < 2)
> - path = strdup("/dev/uio0");
> - else
> - path = strdup(argv[1]);
> + if (argc != 3)
> + error(1, EINVAL, "Usage: ivshmem-demo </dev/uioX> <peer_id>");
Please make peer_id an option, not a must. Maybe -t|--target <target>.
Jan
> + path = strdup(argv[1]);
> + target = atoi(argv[2]);
> +
> fds[0].fd = open(path, O_RDWR);
> if (fds[0].fd < 0)
> error(1, errno, "open(%s)", path);
> @@ -113,6 +114,8 @@ int main(int argc, char *argv[])
>
> id = mmio_read32(®s->id);
> printf("ID = %d\n", id);
> + if (target >= regs->max_peers || target == id)
> + error(1, EINVAL, "invalid peer number");
>
> offset += pgsize;
> size = uio_read_mem_size(path, 1);
> @@ -180,7 +183,6 @@ int main(int argc, char *argv[])
> error(1, errno, "read(sigfd)");
>
> int_no = has_msix ? (id + 1) : 0;
> - target = (id + 1) % 3;
> printf("\nSending interrupt %d to peer %d\n",
> int_no, target);
> mmio_write32(®s->doorbell, int_no | (target << 16));
>
--
Siemens AG, Corporate Technology, CT RDA IOT SES-DE
Corporate Competence Center Embedded Linux
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