From patchwork Wed Mar 13 10:57:54 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Niklas Cassel X-Patchwork-Id: 13591234 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4A8263B798 for ; Wed, 13 Mar 2024 10:58:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710327507; cv=none; b=ZDZrAf165PNegMmbwM0zS6zJdS6n/Skxc0Qs0rcxJtsCNoWSNHC6R8kuwBro45wwjhEMUOF1hJyJJAoBkVzD/fFoyCkSzJaAvIT8IbsPQPXcW0JmsrOTEZNBgymwxHOpWdl6iMt4gkxU+d1+UpVv5Kt0+WjKILXBZEgHvBjOsww= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710327507; c=relaxed/simple; bh=+5dCeZi10/u3RMlvjT4oH8IBPzU4bcYd+CsEmIgXsME=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=n2WoQwgRisGOEa5kUMCyQubBg5T/UMTraoDQ5Z2dtmwphxhCTYW855MLsvIM9Yc72gC4TnNX6nhLp/5PHlJ4tGMrj1IjxGHYCTeB/4vkEg5MTrqxKsW11quBQJnSHAKhgAZ7X97pAoTeZargshagUmUqxF/b8mZLT3tVDR7G7hY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=iE+jIP8x; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="iE+jIP8x" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BD834C43394; Wed, 13 Mar 2024 10:58:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1710327506; bh=+5dCeZi10/u3RMlvjT4oH8IBPzU4bcYd+CsEmIgXsME=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=iE+jIP8x5HwLMf541YDHUs/osZ5PUTPOTU7GUPYUNAU/Gyb0R2ERGcbw3xpPRFLRj 5PF2K+ez0/QIvXpGjpUXCHmSuTEq2Z4ywfw/qdph//Q39F3jjBP/1Hyyjb/SEY4ObO ZUhDLngfoNjLgYyVY+YZCwssNuDqAKp5llpl9cWOE4lovKQcfAPefU4Rrb2PzYdLAd J3W9vo8m4/DUZ9AvTOLDdoO6lIFUCJpcUZOVjRlqkJIhba/0HoJsYtsdWA3rn5Kjyp 2Vw3cq23FqcrKon48HC49wxGQTNJ2p97sQGFg1ZYdzJp+VIQh0f5C0p4+06aoVmzjz PGqhoJKhQldYQ== From: Niklas Cassel To: Manivannan Sadhasivam , Lorenzo Pieralisi , =?utf-8?q?Krzysztof_Wilczy=C5=84?= =?utf-8?q?ski?= , Kishon Vijay Abraham I , Bjorn Helgaas Cc: Shradha Todi , Damien Le Moal , Niklas Cassel , linux-pci@vger.kernel.org Subject: [PATCH v3 2/9] PCI: endpoint: Allocate a 64-bit BAR if that is the only option Date: Wed, 13 Mar 2024 11:57:54 +0100 Message-ID: <20240313105804.100168-3-cassel@kernel.org> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240313105804.100168-1-cassel@kernel.org> References: <20240313105804.100168-1-cassel@kernel.org> Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 pci_epf_alloc_space() already sets the 64-bit flag if the BAR size is larger than 4GB, even if the caller did not explicitly request a 64-bit BAR. Thus, let pci_epf_alloc_space() also set the 64-bit flag if the hardware description says that the specific BAR can only be 64-bit. Signed-off-by: Niklas Cassel Reviewed-by: Manivannan Sadhasivam --- drivers/pci/endpoint/functions/pci-epf-test.c | 3 ++- drivers/pci/endpoint/pci-epf-core.c | 7 ++++--- 2 files changed, 6 insertions(+), 4 deletions(-) diff --git a/drivers/pci/endpoint/functions/pci-epf-test.c b/drivers/pci/endpoint/functions/pci-epf-test.c index 01ba088849cc..8c9802b9b835 100644 --- a/drivers/pci/endpoint/functions/pci-epf-test.c +++ b/drivers/pci/endpoint/functions/pci-epf-test.c @@ -868,7 +868,8 @@ static int pci_epf_test_alloc_space(struct pci_epf *epf) /* * pci_epf_alloc_space() might have given us a 64-bit BAR, - * if we requested a size larger than 4 GB. + * either because the BAR can only be a 64-bit BAR, or if + * we requested a size larger than 4 GB. */ add = (epf_bar->flags & PCI_BASE_ADDRESS_MEM_TYPE_64) ? 2 : 1; } diff --git a/drivers/pci/endpoint/pci-epf-core.c b/drivers/pci/endpoint/pci-epf-core.c index 0a28a0b0911b..e7dbbeb1f0de 100644 --- a/drivers/pci/endpoint/pci-epf-core.c +++ b/drivers/pci/endpoint/pci-epf-core.c @@ -304,9 +304,10 @@ void *pci_epf_alloc_space(struct pci_epf *epf, size_t size, enum pci_barno bar, epf_bar[bar].addr = space; epf_bar[bar].size = size; epf_bar[bar].barno = bar; - epf_bar[bar].flags |= upper_32_bits(size) ? - PCI_BASE_ADDRESS_MEM_TYPE_64 : - PCI_BASE_ADDRESS_MEM_TYPE_32; + if (upper_32_bits(size) || epc_features->bar[bar].only_64bit) + epf_bar[bar].flags |= PCI_BASE_ADDRESS_MEM_TYPE_64; + else + epf_bar[bar].flags |= PCI_BASE_ADDRESS_MEM_TYPE_32; return space; }