From: Ahmad Fatoum <a.fatoum@pengutronix.de>
To: barebox@lists.infradead.org
Subject: Re: [PATCH 8/9] pci: add EFI PCI root bridge IO protocol driver
Date: Mon, 9 Dec 2019 11:39:01 +0100 [thread overview]
Message-ID: <0a1b179b-399b-e28f-aaa2-d4215496fdd5@pengutronix.de> (raw)
In-Reply-To: <20191204125659.22506-9-a.fatoum@pengutronix.de>
On 12/4/19 1:56 PM, Ahmad Fatoum wrote:
> UEFI 2.1D specifies two protocols for abstracting both the PCI host bus
> controller and for PCI devices. The protocol for PCI devices provides
> function pointers for accessing IO Port, Memory and PCI configuration
> space, among others. The protocol for bus controllers provides the
> ability to read the root bridge's PCI configuration space and to query
> resources.
>
> In barebox, we would want to reuse existing PCI drivers unmodified, so
> we utilize the root bridge protocol, unlike most other EFI payloads.
Please dismiss this patch for now. While it works on QEMU,
it doesn't handle address space descriptors of zero size (easily fixable)
and the PCI bridges on my laptop (not so easily fixable).
I'll resend when I had time to figure it out.
Cheers
Ahmad
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next prev parent reply other threads:[~2019-12-09 10:39 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-04 12:56 [PATCH 0/9] efi: add PCI controller driver Ahmad Fatoum
2019-12-04 12:56 ` [PATCH 1/9] efi: add and use new efi_device_has_guid helper Ahmad Fatoum
2019-12-04 12:56 ` [PATCH 2/9] driver: add missing parentheses around macro argument Ahmad Fatoum
2019-12-04 12:56 ` [PATCH 3/9] efi: fix off-by-one in mem_malloc_init(..., end) Ahmad Fatoum
2019-12-04 12:56 ` [PATCH 4/9] x86: efi: lds: don't discard any relocation sections Ahmad Fatoum
2019-12-04 12:56 ` [PATCH 5/9] PCI: add driver_data member to struct pci_device_id Ahmad Fatoum
2019-12-04 12:56 ` [PATCH 6/9] PCI: copy over some Linux PCI helpers Ahmad Fatoum
2019-12-04 12:56 ` [PATCH 7/9] efi: turn set of defines into enumerations Ahmad Fatoum
2019-12-04 12:56 ` [PATCH 8/9] pci: add EFI PCI root bridge IO protocol driver Ahmad Fatoum
2019-12-09 10:39 ` Ahmad Fatoum [this message]
2019-12-04 12:56 ` [PATCH 9/9] serial: add support for PCI NS16550 UARTs Ahmad Fatoum
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