linux-kernel - Re: [PATCH v8 0/5] PCI: endpoint: BAR subrange mapping support

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Message-ID: <aXOTPnSsfqluUiVw@ryzen>
Date: Fri, 23 Jan 2026 16:26:54 +0100
From: Niklas Cassel <cassel@...nel.org>
To: Koichiro Den <den@...inux.co.jp>
Cc: Manivannan Sadhasivam <mani@...nel.org>, bhelgaas@...gle.com,
	kwilczynski@...nel.org, frank.li@....com, linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v8 0/5] PCI: endpoint: BAR subrange mapping support

On Fri, Jan 23, 2026 at 09:35:01AM +0100, Niklas Cassel wrote:
> On Fri, Jan 23, 2026 at 04:11:08PM +0900, Koichiro Den wrote:
> 
> pci_epf_test_enable_doorbell() simply does:
> pci_epc_get_next_free_bar() to get a BAR, then writes the BAR
> number in the in the pci-epf-test command registers, offset:
> PCI_ENDPOINT_TEST_DB_BAR                0x34
> 
> (Which represent the offset in struct pci_epf_test, for
> struct member db_bar)

Correction: Which represents the offset in struct pci_epf_test_reg, for
struct member doorbell_bar.


Kind regards,
Niklas