From: "Pali Rohár" <pali@kernel.org>
To: "Thomas Petazzoni" <thomas.petazzoni@bootlin.com>,
"Lorenzo Pieralisi" <lorenzo.pieralisi@arm.com>,
"Rob Herring" <robh@kernel.org>,
"Krzysztof Wilczyński" <kw@linux.com>,
"Bjorn Helgaas" <bhelgaas@google.com>,
"Marek Behún" <kabel@kernel.org>
Cc: linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: [PATCH 04/11] PCI: pci-bridge-emul: Add support for new flag PCI_BRIDGE_EMUL_NO_IO_FORWARD
Date: Tue, 21 Dec 2021 15:14:48 +0100 [thread overview]
Message-ID: <20211221141455.30011-5-pali@kernel.org> (raw)
In-Reply-To: <20211221141455.30011-1-pali@kernel.org>
Like PCI_BRIDGE_EMUL_NO_PREFMEM_FORWARD, this new flag specifies that
emulated PCI bridge does not support forwarding of IO requests in given
range between primary and secondary buses. This flag should be used as
argument for pci_bridge_emul_init() for hardware setup without IO support.
Setting this flag cause that IO base and limit registers are read-only.
Signed-off-by: Pali Rohár <pali@kernel.org>
---
drivers/pci/pci-bridge-emul.c | 9 +++++++++
drivers/pci/pci-bridge-emul.h | 1 +
2 files changed, 10 insertions(+)
diff --git a/drivers/pci/pci-bridge-emul.c b/drivers/pci/pci-bridge-emul.c
index 432b1bec2e22..033bbeb99176 100644
--- a/drivers/pci/pci-bridge-emul.c
+++ b/drivers/pci/pci-bridge-emul.c
@@ -378,6 +378,15 @@ int pci_bridge_emul_init(struct pci_bridge_emul *bridge,
bridge->pci_regs_behavior[PCI_PREF_MEMORY_BASE / 4].rw = 0;
}
+ if (flags & PCI_BRIDGE_EMUL_NO_IO_FORWARD) {
+ bridge->pci_regs_behavior[PCI_COMMAND / 4].ro |= PCI_COMMAND_IO;
+ bridge->pci_regs_behavior[PCI_COMMAND / 4].rw &= ~PCI_COMMAND_IO;
+ bridge->pci_regs_behavior[PCI_IO_BASE / 4].ro |= GENMASK(15, 0);
+ bridge->pci_regs_behavior[PCI_IO_BASE / 4].rw &= ~GENMASK(15, 0);
+ bridge->pci_regs_behavior[PCI_IO_BASE_UPPER16 / 4].ro = ~0;
+ bridge->pci_regs_behavior[PCI_IO_BASE_UPPER16 / 4].rw = 0;
+ }
+
return 0;
}
EXPORT_SYMBOL_GPL(pci_bridge_emul_init);
diff --git a/drivers/pci/pci-bridge-emul.h b/drivers/pci/pci-bridge-emul.h
index 88877ebefbac..ab33609c598b 100644
--- a/drivers/pci/pci-bridge-emul.h
+++ b/drivers/pci/pci-bridge-emul.h
@@ -121,6 +121,7 @@ struct pci_bridge_emul {
enum {
PCI_BRIDGE_EMUL_NO_PREFMEM_FORWARD = BIT(0),
+ PCI_BRIDGE_EMUL_NO_IO_FORWARD = BIT(1),
};
int pci_bridge_emul_init(struct pci_bridge_emul *bridge,
--
2.20.1
WARNING: multiple messages have this Message-ID (diff)
From: "Pali Rohár" <pali@kernel.org>
To: "Thomas Petazzoni" <thomas.petazzoni@bootlin.com>,
"Lorenzo Pieralisi" <lorenzo.pieralisi@arm.com>,
"Rob Herring" <robh@kernel.org>,
"Krzysztof Wilczyński" <kw@linux.com>,
"Bjorn Helgaas" <bhelgaas@google.com>,
"Marek Behún" <kabel@kernel.org>
Cc: linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: [PATCH 04/11] PCI: pci-bridge-emul: Add support for new flag PCI_BRIDGE_EMUL_NO_IO_FORWARD
Date: Tue, 21 Dec 2021 15:14:48 +0100 [thread overview]
Message-ID: <20211221141455.30011-5-pali@kernel.org> (raw)
In-Reply-To: <20211221141455.30011-1-pali@kernel.org>
Like PCI_BRIDGE_EMUL_NO_PREFMEM_FORWARD, this new flag specifies that
emulated PCI bridge does not support forwarding of IO requests in given
range between primary and secondary buses. This flag should be used as
argument for pci_bridge_emul_init() for hardware setup without IO support.
Setting this flag cause that IO base and limit registers are read-only.
Signed-off-by: Pali Rohár <pali@kernel.org>
---
drivers/pci/pci-bridge-emul.c | 9 +++++++++
drivers/pci/pci-bridge-emul.h | 1 +
2 files changed, 10 insertions(+)
diff --git a/drivers/pci/pci-bridge-emul.c b/drivers/pci/pci-bridge-emul.c
index 432b1bec2e22..033bbeb99176 100644
--- a/drivers/pci/pci-bridge-emul.c
+++ b/drivers/pci/pci-bridge-emul.c
@@ -378,6 +378,15 @@ int pci_bridge_emul_init(struct pci_bridge_emul *bridge,
bridge->pci_regs_behavior[PCI_PREF_MEMORY_BASE / 4].rw = 0;
}
+ if (flags & PCI_BRIDGE_EMUL_NO_IO_FORWARD) {
+ bridge->pci_regs_behavior[PCI_COMMAND / 4].ro |= PCI_COMMAND_IO;
+ bridge->pci_regs_behavior[PCI_COMMAND / 4].rw &= ~PCI_COMMAND_IO;
+ bridge->pci_regs_behavior[PCI_IO_BASE / 4].ro |= GENMASK(15, 0);
+ bridge->pci_regs_behavior[PCI_IO_BASE / 4].rw &= ~GENMASK(15, 0);
+ bridge->pci_regs_behavior[PCI_IO_BASE_UPPER16 / 4].ro = ~0;
+ bridge->pci_regs_behavior[PCI_IO_BASE_UPPER16 / 4].rw = 0;
+ }
+
return 0;
}
EXPORT_SYMBOL_GPL(pci_bridge_emul_init);
diff --git a/drivers/pci/pci-bridge-emul.h b/drivers/pci/pci-bridge-emul.h
index 88877ebefbac..ab33609c598b 100644
--- a/drivers/pci/pci-bridge-emul.h
+++ b/drivers/pci/pci-bridge-emul.h
@@ -121,6 +121,7 @@ struct pci_bridge_emul {
enum {
PCI_BRIDGE_EMUL_NO_PREFMEM_FORWARD = BIT(0),
+ PCI_BRIDGE_EMUL_NO_IO_FORWARD = BIT(1),
};
int pci_bridge_emul_init(struct pci_bridge_emul *bridge,
--
2.20.1
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next prev parent reply other threads:[~2021-12-21 14:56 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-21 14:14 [PATCH 00/11] PCI: Small improvements for pci-bridge-emul and mvebu Pali Rohár
2021-12-21 14:14 ` Pali Rohár
2021-12-21 14:14 ` [PATCH 01/11] MAINTAINERS: Add Pali Rohár as pci-mvebu.c maintainer Pali Rohár
2021-12-21 14:14 ` Pali Rohár
2021-12-21 15:39 ` Thomas Petazzoni
2021-12-21 15:39 ` Thomas Petazzoni
2021-12-21 14:14 ` [PATCH 02/11] PCI: pci-bridge-emul: Make struct pci_bridge_emul_ops as const Pali Rohár
2021-12-21 14:14 ` Pali Rohár
2021-12-21 15:39 ` Thomas Petazzoni
2021-12-21 15:39 ` Thomas Petazzoni
2021-12-21 14:14 ` [PATCH 03/11] PCI: pci-bridge-emul: Rename PCI_BRIDGE_EMUL_NO_PREFETCHABLE_BAR to PCI_BRIDGE_EMUL_NO_PREFMEM_FORWARD Pali Rohár
2021-12-21 14:14 ` Pali Rohár
2021-12-21 15:41 ` Thomas Petazzoni
2021-12-21 15:41 ` Thomas Petazzoni
2021-12-21 14:14 ` Pali Rohár [this message]
2021-12-21 14:14 ` [PATCH 04/11] PCI: pci-bridge-emul: Add support for new flag PCI_BRIDGE_EMUL_NO_IO_FORWARD Pali Rohár
2021-12-21 15:42 ` Thomas Petazzoni
2021-12-21 15:42 ` Thomas Petazzoni
2021-12-21 14:14 ` [PATCH 05/11] PCI: mvebu: Add help string for CONFIG_PCI_MVEBU option Pali Rohár
2021-12-21 14:14 ` Pali Rohár
2021-12-21 15:43 ` Thomas Petazzoni
2021-12-21 15:43 ` Thomas Petazzoni
2021-12-21 14:14 ` [PATCH 06/11] PCI: mvebu: Remove duplicate nports assignment Pali Rohár
2021-12-21 14:14 ` Pali Rohár
2021-12-21 15:44 ` Thomas Petazzoni
2021-12-21 15:44 ` Thomas Petazzoni
2021-12-21 14:14 ` [PATCH 07/11] PCI: mvebu: Set PCI_BRIDGE_EMUL_NO_IO_FORWARD when IO is unsupported Pali Rohár
2021-12-21 14:14 ` Pali Rohár
2021-12-21 14:14 ` [PATCH 08/11] PCI: mvebu: Properly initialize vendor, device and revision of emulated bridge Pali Rohár
2021-12-21 14:14 ` Pali Rohár
2021-12-21 14:14 ` [PATCH 09/11] PCI: mvebu: Update comment for PCI_EXP_LNKCAP register on " Pali Rohár
2021-12-21 14:14 ` Pali Rohár
2021-12-21 14:14 ` [PATCH 10/11] PCI: mvebu: Update comment for PCI_EXP_LNKCTL " Pali Rohár
2021-12-21 14:14 ` Pali Rohár
2021-12-21 14:14 ` [PATCH 11/11] PCI: mvebu: Fix reporting Data Link Layer Link Active " Pali Rohár
2021-12-21 14:14 ` Pali Rohár
2022-01-04 15:35 ` [PATCH v2 00/11] PCI: Small improvements for pci-bridge-emul and mvebu Pali Rohár
2022-01-04 15:35 ` Pali Rohár
2022-01-04 15:35 ` [PATCH v2 01/11] MAINTAINERS: Add Pali Rohár as pci-mvebu.c maintainer Pali Rohár
2022-01-04 15:35 ` Pali Rohár
2022-01-04 15:35 ` [PATCH v2 02/11] PCI: pci-bridge-emul: Make struct pci_bridge_emul_ops as const Pali Rohár
2022-01-04 15:35 ` Pali Rohár
2022-01-04 15:35 ` [PATCH v2 03/11] PCI: pci-bridge-emul: Rename PCI_BRIDGE_EMUL_NO_PREFETCHABLE_BAR to PCI_BRIDGE_EMUL_NO_PREFMEM_FORWARD Pali Rohár
2022-01-04 15:35 ` Pali Rohár
2022-01-04 15:35 ` [PATCH v2 04/11] PCI: pci-bridge-emul: Add support for new flag PCI_BRIDGE_EMUL_NO_IO_FORWARD Pali Rohár
2022-01-04 15:35 ` Pali Rohár
2022-01-04 15:35 ` [PATCH v2 05/11] PCI: mvebu: Add help string for CONFIG_PCI_MVEBU option Pali Rohár
2022-01-04 15:35 ` Pali Rohár
2022-01-04 15:35 ` [PATCH v2 06/11] PCI: mvebu: Remove duplicate nports assignment Pali Rohár
2022-01-04 15:35 ` Pali Rohár
2022-01-04 15:35 ` [PATCH v2 07/11] PCI: mvebu: Set PCI_BRIDGE_EMUL_NO_IO_FORWARD when IO is unsupported Pali Rohár
2022-01-04 15:35 ` Pali Rohár
2022-01-04 15:35 ` [PATCH v2 08/11] PCI: mvebu: Properly initialize vendor, device and revision of emulated bridge Pali Rohár
2022-01-04 15:35 ` Pali Rohár
2022-01-04 15:35 ` [PATCH v2 09/11] PCI: mvebu: Update comment for PCI_EXP_LNKCAP register on " Pali Rohár
2022-01-04 15:35 ` Pali Rohár
2022-01-04 15:35 ` [PATCH v2 10/11] PCI: mvebu: Update comment for PCI_EXP_LNKCTL " Pali Rohár
2022-01-04 15:35 ` Pali Rohár
2022-01-04 15:35 ` [PATCH v2 11/11] PCI: mvebu: Fix reporting Data Link Layer Link Active " Pali Rohár
2022-01-04 15:35 ` Pali Rohár
2022-01-20 9:01 ` [PATCH v2 00/11] PCI: Small improvements for pci-bridge-emul and mvebu Pali Rohár
2022-01-20 9:01 ` Pali Rohár
2022-01-20 16:31 ` Rob Herring
2022-01-20 16:31 ` Rob Herring
2022-02-03 10:56 ` Lorenzo Pieralisi
2022-02-03 10:56 ` Lorenzo Pieralisi
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