[dpdk-stable] [PATCH 20.11] bus/pci: support I/O port operations with musl

[Xueming(Steven) Li]

Thanks, applied into 20.11 work queue

> -----Original Message-----
> From: Thomas Monjalon <thomas at monjalon.net>
> Sent: Friday, May 28, 2021 5:21 PM
> To: stable at dpdk.org
> Cc: Xueming(Steven) Li <xuemingl at nvidia.com>; Natanael Copa <ncopa at alpinelinux.org>; Andrew Rybchenko
> <andrew.rybchenko at oktetlabs.ru>; David Marchand <david.marchand at redhat.com>
> Subject: [PATCH 20.11] bus/pci: support I/O port operations with musl
> 
> [ upstream commit 204a7f44bc457b2c75c9eeb56468214664c830f0 ]
> 
> Add a fallback for non-GNU libc systems like musl libc for the non-standard functions outl_p, outw_p and outb_p.
> 
> It solves the following errors when building with musl libc:
> 	pci_uio.c: undefined reference to 'outw_p'
> 	pci_uio.c: undefined reference to 'outl_p'
> 	pci_uio.c: undefined reference to 'outb_p'
> 
> Bugzilla ID: 35
> Fixes: 756ce64b1ecd ("eal: introduce PCI ioport API")
> Cc: stable at dpdk.org
> 
> Reported-by: Natanael Copa <ncopa at alpinelinux.org>
> Signed-off-by: Thomas Monjalon <thomas at monjalon.net>
> Acked-by: Andrew Rybchenko <andrew.rybchenko at oktetlabs.ru>
> Acked-by: David Marchand <david.marchand at redhat.com>
> ---
>  drivers/bus/pci/linux/pci_uio.c | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
> 
> diff --git a/drivers/bus/pci/linux/pci_uio.c b/drivers/bus/pci/linux/pci_uio.c index f3305a2f28..624b2e2ecf 100644
> --- a/drivers/bus/pci/linux/pci_uio.c
> +++ b/drivers/bus/pci/linux/pci_uio.c
> @@ -535,21 +535,33 @@ pci_uio_ioport_write(struct rte_pci_ioport *p,
>  		if (len >= 4) {
>  			size = 4;
>  #if defined(RTE_ARCH_X86)
> +#ifdef __GLIBC__
>  			outl_p(*(const uint32_t *)s, reg);
> +#else
> +			outl(*(const uint32_t *)s, reg);
> +#endif
>  #else
>  			*(volatile uint32_t *)reg = *(const uint32_t *)s;  #endif
>  		} else if (len >= 2) {
>  			size = 2;
>  #if defined(RTE_ARCH_X86)
> +#ifdef __GLIBC__
>  			outw_p(*(const uint16_t *)s, reg);
> +#else
> +			outw(*(const uint16_t *)s, reg);
> +#endif
>  #else
>  			*(volatile uint16_t *)reg = *(const uint16_t *)s;  #endif
>  		} else {
>  			size = 1;
>  #if defined(RTE_ARCH_X86)
> +#ifdef __GLIBC__
>  			outb_p(*s, reg);
> +#else
> +			outb(*s, reg);
> +#endif
>  #else
>  			*(volatile uint8_t *)reg = *s;
>  #endif
> --
> 2.31.1