--- /dev/null
+From 46560388c476c8471fde7712c10f9fad8d0d1875 Mon Sep 17 00:00:00 2001
+From: Ray Jui <rjui@broadcom.com>
+Date: Wed, 27 Jan 2016 16:52:24 -0600
+Subject: [PATCH] PCI: iproc: Allow multiple devices except on PAXC
+
+Commit 943ebae781f5 ("PCI: iproc: Add PAXC interface support") only allowed
+device 0, which is a regression on BCMA-based platforms.
+
+All systems support only one device, a Root Port at 00:00.0, on the root
+bus. PAXC-based systems support only the Root Port (00:00.0) and a single
+device (with multiple functions) below it, e.g., 01:00.0, 01:00.1, etc.
+Non-PAXC systems support arbitrary devices below the Root Port.
+
+[bhelgaas: changelog, fold in removal of MAX_NUM_PAXC_PF check]
+Fixes: 943ebae781f5 ("PCI: iproc: Add PAXC interface support")
+Reported-by: Rafal Milecki <zajec5@gmail.com>
+Signed-off-by: Ray Jui <rjui@broadcom.com>
+Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
+---
+ drivers/pci/host/pcie-iproc.c | 29 +++++++++++------------------
+ 1 file changed, 11 insertions(+), 18 deletions(-)
+
+--- a/drivers/pci/host/pcie-iproc.c
++++ b/drivers/pci/host/pcie-iproc.c
+@@ -64,7 +64,6 @@
+ #define OARR_SIZE_CFG BIT(OARR_SIZE_CFG_SHIFT)
+
+ #define MAX_NUM_OB_WINDOWS 2
+-#define MAX_NUM_PAXC_PF 4
+
+ #define IPROC_PCIE_REG_INVALID 0xffff
+
+@@ -170,20 +169,6 @@ static inline void iproc_pcie_ob_write(struct iproc_pcie *pcie,
+ writel(val, pcie->base + offset + (window * 8));
+ }
+
+-static inline bool iproc_pcie_device_is_valid(struct iproc_pcie *pcie,
+- unsigned int slot,
+- unsigned int fn)
+-{
+- if (slot > 0)
+- return false;
+-
+- /* PAXC can only support limited number of functions */
+- if (pcie->type == IPROC_PCIE_PAXC && fn >= MAX_NUM_PAXC_PF)
+- return false;
+-
+- return true;
+-}
+-
+ /**
+ * Note access to the configuration registers are protected at the higher layer
+ * by 'pci_lock' in drivers/pci/access.c
+@@ -199,11 +184,11 @@ static void __iomem *iproc_pcie_map_cfg_bus(struct pci_bus *bus,
+ u32 val;
+ u16 offset;
+
+- if (!iproc_pcie_device_is_valid(pcie, slot, fn))
+- return NULL;
+-
+ /* root complex access */
+ if (busno == 0) {
++ if (slot > 0 || fn > 0)
++ return NULL;
++
+ iproc_pcie_write_reg(pcie, IPROC_PCIE_CFG_IND_ADDR,
+ where & CFG_IND_ADDR_MASK);
+ offset = iproc_pcie_reg_offset(pcie, IPROC_PCIE_CFG_IND_DATA);
+@@ -213,6 +198,14 @@ static void __iomem *iproc_pcie_map_cfg_bus(struct pci_bus *bus,
+ return (pcie->base + offset);
+ }
+
++ /*
++ * PAXC is connected to an internally emulated EP within the SoC. It
++ * allows only one device.
++ */
++ if (pcie->type == IPROC_PCIE_PAXC)
++ if (slot > 0)
++ return NULL;
++
+ /* EP device access */
+ val = (busno << CFG_ADDR_BUS_NUM_SHIFT) |
+ (slot << CFG_ADDR_DEV_NUM_SHIFT) |
+++ /dev/null
-From patchwork Wed Jan 20 22:55:10 2016
-Content-Type: text/plain; charset="utf-8"
-MIME-Version: 1.0
-Content-Transfer-Encoding: 7bit
-Subject: PCI: iproc: Fix BCMA PCIe bus scanning regression
-From: Ray Jui <rjui@broadcom.com>
-X-Patchwork-Id: 570953
-Message-Id: <1453330510-21926-1-git-send-email-rjui@broadcom.com>
-To: Bjorn Helgaas <bhelgaas@google.com>
-Cc: Rafal Milecki <zajec5@gmail.com>, Hante Meuleman <meuleman@broadcom.com>,
- Hauke Mehrtens <hauke@hauke-m.de>, <linux-kernel@vger.kernel.org>,
- <bcm-kernel-feedback-list@broadcom.com>,
- <linux-pci@vger.kernel.org>, Ray Jui <rjui@broadcom.com>
-Date: Wed, 20 Jan 2016 14:55:10 -0800
-
-Commit 943ebae781f5 ("PCI: iproc: Add PAXC interface support") causes
-regression on EP device detection on BCMA based platforms. This patch
-fixes the issue by allowing multiple devices to be configured on the
-same bus, for all PAXB based child buses
-
-Reported-by: Rafal Milecki <zajec5@gmail.com>
-Fixes: 943ebae781f5 ("PCI: iproc: Add PAXC interface support")
-Signed-off-by: Ray Jui <rjui@broadcom.com>
----
- drivers/pci/host/pcie-iproc.c | 5 +++--
- 1 file changed, 3 insertions(+), 2 deletions(-)
-
---- a/drivers/pci/host/pcie-iproc.c
-+++ b/drivers/pci/host/pcie-iproc.c
-@@ -171,10 +171,11 @@ static inline void iproc_pcie_ob_write(s
- }
-
- static inline bool iproc_pcie_device_is_valid(struct iproc_pcie *pcie,
-+ unsigned int busnum,
- unsigned int slot,
- unsigned int fn)
- {
-- if (slot > 0)
-+ if ((pcie->type == IPROC_PCIE_PAXC || busnum == 0) && slot > 0)
- return false;
-
- /* PAXC can only support limited number of functions */
-@@ -199,7 +200,7 @@ static void __iomem *iproc_pcie_map_cfg_
- u32 val;
- u16 offset;
-
-- if (!iproc_pcie_device_is_valid(pcie, slot, fn))
-+ if (!iproc_pcie_device_is_valid(pcie, busno, slot, fn))
- return NULL;
-
- /* root complex access */
--- /dev/null
+From 46560388c476c8471fde7712c10f9fad8d0d1875 Mon Sep 17 00:00:00 2001
+From: Ray Jui <rjui@broadcom.com>
+Date: Wed, 27 Jan 2016 16:52:24 -0600
+Subject: [PATCH] PCI: iproc: Allow multiple devices except on PAXC
+
+Commit 943ebae781f5 ("PCI: iproc: Add PAXC interface support") only allowed
+device 0, which is a regression on BCMA-based platforms.
+
+All systems support only one device, a Root Port at 00:00.0, on the root
+bus. PAXC-based systems support only the Root Port (00:00.0) and a single
+device (with multiple functions) below it, e.g., 01:00.0, 01:00.1, etc.
+Non-PAXC systems support arbitrary devices below the Root Port.
+
+[bhelgaas: changelog, fold in removal of MAX_NUM_PAXC_PF check]
+Fixes: 943ebae781f5 ("PCI: iproc: Add PAXC interface support")
+Reported-by: Rafal Milecki <zajec5@gmail.com>
+Signed-off-by: Ray Jui <rjui@broadcom.com>
+Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
+---
+ drivers/pci/host/pcie-iproc.c | 29 +++++++++++------------------
+ 1 file changed, 11 insertions(+), 18 deletions(-)
+
+--- a/drivers/pci/host/pcie-iproc.c
++++ b/drivers/pci/host/pcie-iproc.c
+@@ -64,7 +64,6 @@
+ #define OARR_SIZE_CFG BIT(OARR_SIZE_CFG_SHIFT)
+
+ #define MAX_NUM_OB_WINDOWS 2
+-#define MAX_NUM_PAXC_PF 4
+
+ #define IPROC_PCIE_REG_INVALID 0xffff
+
+@@ -170,20 +169,6 @@ static inline void iproc_pcie_ob_write(struct iproc_pcie *pcie,
+ writel(val, pcie->base + offset + (window * 8));
+ }
+
+-static inline bool iproc_pcie_device_is_valid(struct iproc_pcie *pcie,
+- unsigned int slot,
+- unsigned int fn)
+-{
+- if (slot > 0)
+- return false;
+-
+- /* PAXC can only support limited number of functions */
+- if (pcie->type == IPROC_PCIE_PAXC && fn >= MAX_NUM_PAXC_PF)
+- return false;
+-
+- return true;
+-}
+-
+ /**
+ * Note access to the configuration registers are protected at the higher layer
+ * by 'pci_lock' in drivers/pci/access.c
+@@ -199,11 +184,11 @@ static void __iomem *iproc_pcie_map_cfg_bus(struct pci_bus *bus,
+ u32 val;
+ u16 offset;
+
+- if (!iproc_pcie_device_is_valid(pcie, slot, fn))
+- return NULL;
+-
+ /* root complex access */
+ if (busno == 0) {
++ if (slot > 0 || fn > 0)
++ return NULL;
++
+ iproc_pcie_write_reg(pcie, IPROC_PCIE_CFG_IND_ADDR,
+ where & CFG_IND_ADDR_MASK);
+ offset = iproc_pcie_reg_offset(pcie, IPROC_PCIE_CFG_IND_DATA);
+@@ -213,6 +198,14 @@ static void __iomem *iproc_pcie_map_cfg_bus(struct pci_bus *bus,
+ return (pcie->base + offset);
+ }
+
++ /*
++ * PAXC is connected to an internally emulated EP within the SoC. It
++ * allows only one device.
++ */
++ if (pcie->type == IPROC_PCIE_PAXC)
++ if (slot > 0)
++ return NULL;
++
+ /* EP device access */
+ val = (busno << CFG_ADDR_BUS_NUM_SHIFT) |
+ (slot << CFG_ADDR_DEV_NUM_SHIFT) |
--- /dev/null
+From 46560388c476c8471fde7712c10f9fad8d0d1875 Mon Sep 17 00:00:00 2001
+From: Ray Jui <rjui@broadcom.com>
+Date: Wed, 27 Jan 2016 16:52:24 -0600
+Subject: [PATCH] PCI: iproc: Allow multiple devices except on PAXC
+
+Commit 943ebae781f5 ("PCI: iproc: Add PAXC interface support") only allowed
+device 0, which is a regression on BCMA-based platforms.
+
+All systems support only one device, a Root Port at 00:00.0, on the root
+bus. PAXC-based systems support only the Root Port (00:00.0) and a single
+device (with multiple functions) below it, e.g., 01:00.0, 01:00.1, etc.
+Non-PAXC systems support arbitrary devices below the Root Port.
+
+[bhelgaas: changelog, fold in removal of MAX_NUM_PAXC_PF check]
+Fixes: 943ebae781f5 ("PCI: iproc: Add PAXC interface support")
+Reported-by: Rafal Milecki <zajec5@gmail.com>
+Signed-off-by: Ray Jui <rjui@broadcom.com>
+Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
+---
+ drivers/pci/host/pcie-iproc.c | 29 +++++++++++------------------
+ 1 file changed, 11 insertions(+), 18 deletions(-)
+
+--- a/drivers/pci/host/pcie-iproc.c
++++ b/drivers/pci/host/pcie-iproc.c
+@@ -64,7 +64,6 @@
+ #define OARR_SIZE_CFG BIT(OARR_SIZE_CFG_SHIFT)
+
+ #define MAX_NUM_OB_WINDOWS 2
+-#define MAX_NUM_PAXC_PF 4
+
+ #define IPROC_PCIE_REG_INVALID 0xffff
+
+@@ -170,20 +169,6 @@ static inline void iproc_pcie_ob_write(struct iproc_pcie *pcie,
+ writel(val, pcie->base + offset + (window * 8));
+ }
+
+-static inline bool iproc_pcie_device_is_valid(struct iproc_pcie *pcie,
+- unsigned int slot,
+- unsigned int fn)
+-{
+- if (slot > 0)
+- return false;
+-
+- /* PAXC can only support limited number of functions */
+- if (pcie->type == IPROC_PCIE_PAXC && fn >= MAX_NUM_PAXC_PF)
+- return false;
+-
+- return true;
+-}
+-
+ /**
+ * Note access to the configuration registers are protected at the higher layer
+ * by 'pci_lock' in drivers/pci/access.c
+@@ -199,11 +184,11 @@ static void __iomem *iproc_pcie_map_cfg_bus(struct pci_bus *bus,
+ u32 val;
+ u16 offset;
+
+- if (!iproc_pcie_device_is_valid(pcie, slot, fn))
+- return NULL;
+-
+ /* root complex access */
+ if (busno == 0) {
++ if (slot > 0 || fn > 0)
++ return NULL;
++
+ iproc_pcie_write_reg(pcie, IPROC_PCIE_CFG_IND_ADDR,
+ where & CFG_IND_ADDR_MASK);
+ offset = iproc_pcie_reg_offset(pcie, IPROC_PCIE_CFG_IND_DATA);
+@@ -213,6 +198,14 @@ static void __iomem *iproc_pcie_map_cfg_bus(struct pci_bus *bus,
+ return (pcie->base + offset);
+ }
+
++ /*
++ * PAXC is connected to an internally emulated EP within the SoC. It
++ * allows only one device.
++ */
++ if (pcie->type == IPROC_PCIE_PAXC)
++ if (slot > 0)
++ return NULL;
++
+ /* EP device access */
+ val = (busno << CFG_ADDR_BUS_NUM_SHIFT) |
+ (slot << CFG_ADDR_DEV_NUM_SHIFT) |
+++ /dev/null
-From c43e4b52cbf2267047f67c9f65de18ee1ab8bfa2 Mon Sep 17 00:00:00 2001
-From: Ray Jui <rjui@broadcom.com>
-Date: Wed, 27 Jan 2016 16:52:24 -0600
-Subject: [PATCH] PCI: iproc: Fix BCMA PCIe bus scanning regression
-
-Commit 943ebae781f5 ("PCI: iproc: Add PAXC interface support") causes
-regression on EP device detection on BCMA based platforms.
-
-Fix the issue by allowing multiple devices to be configured on the same
-bus, for all PAXB based child buses. In addition, add a check to prevent
-non-zero function from being used on bus 0 (root bus).
-
-Fixes: 943ebae781f5 ("PCI: iproc: Add PAXC interface support")
-Reported-by: Rafal Milecki <zajec5@gmail.com>
-Signed-off-by: Ray Jui <rjui@broadcom.com>
-Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
----
- drivers/pci/host/pcie-iproc.c | 28 +++++++++++-----------------
- 1 file changed, 11 insertions(+), 17 deletions(-)
-
---- a/drivers/pci/host/pcie-iproc.c
-+++ b/drivers/pci/host/pcie-iproc.c
-@@ -170,20 +170,6 @@ static inline void iproc_pcie_ob_write(s
- writel(val, pcie->base + offset + (window * 8));
- }
-
--static inline bool iproc_pcie_device_is_valid(struct iproc_pcie *pcie,
-- unsigned int slot,
-- unsigned int fn)
--{
-- if (slot > 0)
-- return false;
--
-- /* PAXC can only support limited number of functions */
-- if (pcie->type == IPROC_PCIE_PAXC && fn >= MAX_NUM_PAXC_PF)
-- return false;
--
-- return true;
--}
--
- /**
- * Note access to the configuration registers are protected at the higher layer
- * by 'pci_lock' in drivers/pci/access.c
-@@ -199,11 +185,11 @@ static void __iomem *iproc_pcie_map_cfg_
- u32 val;
- u16 offset;
-
-- if (!iproc_pcie_device_is_valid(pcie, slot, fn))
-- return NULL;
--
- /* root complex access */
- if (busno == 0) {
-+ if (slot > 0 || fn > 0)
-+ return NULL;
-+
- iproc_pcie_write_reg(pcie, IPROC_PCIE_CFG_IND_ADDR,
- where & CFG_IND_ADDR_MASK);
- offset = iproc_pcie_reg_offset(pcie, IPROC_PCIE_CFG_IND_DATA);
-@@ -213,6 +199,14 @@ static void __iomem *iproc_pcie_map_cfg_
- return (pcie->base + offset);
- }
-
-+ /*
-+ * PAXC is connected to an internally emulated EP within the SoC. It
-+ * allows only one device and supports a limited number of functions.
-+ */
-+ if (pcie->type == IPROC_PCIE_PAXC)
-+ if (slot > 0 || fn >= MAX_NUM_PAXC_PF)
-+ return NULL;
-+
- /* EP device access */
- val = (busno << CFG_ADDR_BUS_NUM_SHIFT) |
- (slot << CFG_ADDR_DEV_NUM_SHIFT) |
projects / openwrt / staging / yousong.git / commitdiff