PCI: controller: thunder: fix compile testing

PATCH In review Arnd Bergmann 4 participants 8 messages Feb 25, 2021 – Feb 27, 2021

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PCI PCI native host bridge and endpoint drivers PCIe driver for cavium thunderx

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Arnd Bergmann

author

2021-02-25 14:38 UTC #0 lore raw

PATCH 1/2 PCI: controller: thunder: fix compile testing

From: Arnd Bergmann <[email protected]>

Compile-testing these drivers is currently broken. Enabling it causes a couple of build failures though:

drivers/pci/controller/pci-thunder-ecam.c:119:30: error: shift count >= width of type [-Werror,-Wshift-count-overflow] drivers/pci/controller/pci-thunder-pem.c:54:2: error: implicit declaration of function 'writeq' [-Werror,-Wimplicit-function-declaration] drivers/pci/controller/pci-thunder-pem.c:392:8: error: implicit declaration of function 'acpi_get_rc_resources' [-Werror,-Wimplicit-function-declaration]

Fix them with the obvious one-line changes.

Signed-off-by Arnd Bergmann <[email protected]>

---
 drivers/pci/controller/pci-thunder-ecam.c |  2 +-
 drivers/pci/controller/pci-thunder-pem.c  | 13 +++++++------
 drivers/pci/pci.h                         |  6 ++++++
 3 files changed, 14 insertions(+), 7 deletions(-)

drivers/pci/controller/pci-thunder-ecam.c +1 -1

index f964fd26f7e0..ffd84656544f 100644
@@ -116,7 +116,7 @@ static int thunder_ecam_p2_config_read(struct pci_bus *bus, unsigned int devfn,
 	 * the config space access window.  Since we are working with
 	 * the high-order 32 bits, shift everything down by 32 bits.
 	 */
-	node_bits = (cfg->res.start >> 32) & (1 << 12);
+	node_bits = upper_32_bits(cfg->res.start) & (1 << 12);
 
 	v |= node_bits;
 	set_val(v, where, size, val);

drivers/pci/controller/pci-thunder-pem.c +7 -6

index 1a3f70ac61fc..0660b9da204f 100644
@@ -12,6 +12,7 @@
 #include <linux/pci-acpi.h>
 #include <linux/pci-ecam.h>
 #include <linux/platform_device.h>
+#include <linux/io-64-nonatomic-lo-hi.h>
 #include "../pci.h"
 
 #if defined(CONFIG_PCI_HOST_THUNDER_PEM) || (defined(CONFIG_ACPI) && defined(CONFIG_PCI_QUIRKS))

@@ -324,9 +325,9 @@ static int thunder_pem_init(struct device *dev, struct pci_config_window *cfg,
 	 * structure here for the BAR.
 	 */
 	bar4_start = res_pem->start + 0xf00000;
-	pem_pci->ea_entry[0] = (u32)bar4_start | 2;
-	pem_pci->ea_entry[1] = (u32)(res_pem->end - bar4_start) & ~3u;
-	pem_pci->ea_entry[2] = (u32)(bar4_start >> 32);
+	pem_pci->ea_entry[0] = lower_32_bits(bar4_start) | 2;
+	pem_pci->ea_entry[1] = lower_32_bits(res_pem->end - bar4_start) & ~3u;
+	pem_pci->ea_entry[2] = upper_32_bits(bar4_start);
 
 	cfg->priv = pem_pci;
 	return 0;

@@ -334,9 +335,9 @@ static int thunder_pem_init(struct device *dev, struct pci_config_window *cfg,
 
 #if defined(CONFIG_ACPI) && defined(CONFIG_PCI_QUIRKS)
 
-#define PEM_RES_BASE		0x87e0c0000000UL
-#define PEM_NODE_MASK		GENMASK(45, 44)
-#define PEM_INDX_MASK		GENMASK(26, 24)
+#define PEM_RES_BASE		0x87e0c0000000ULL
+#define PEM_NODE_MASK		GENMASK_ULL(45, 44)
+#define PEM_INDX_MASK		GENMASK_ULL(26, 24)
 #define PEM_MIN_DOM_IN_NODE	4
 #define PEM_MAX_DOM_IN_NODE	10

drivers/pci/pci.h +6 -0

index 0a2b6d993fe1..022c2f433676 100644
@@ -625,6 +625,12 @@ static inline int pci_dev_specific_reset(struct pci_dev *dev, int probe)
 #if defined(CONFIG_PCI_QUIRKS) && defined(CONFIG_ARM64)
 int acpi_get_rc_resources(struct device *dev, const char *hid, u16 segment,
 			  struct resource *res);
+#else
+static inline int acpi_get_rc_resources(struct device *dev, const char *hid,
+					u16 segment, struct resource *res)
+{
+	return -ENODEV;
+}
 #endif
 
 int pci_rebar_get_current_size(struct pci_dev *pdev, int bar);

Signature · 1 line

2.29.2

Arnd Bergmann

author

2021-02-25 14:38 UTC #1 lore raw

PATCH 2/2 PCI: controller: avoid building empty drivers

From: Arnd Bergmann <[email protected]>

There are harmless warnings when compile testing the kernel with CONFIG_TRIM_UNUSED_KSYMS:

drivers/pci/controller/dwc/pcie-al.o: no symbols drivers/pci/controller/pci-thunder-ecam.o: no symbols drivers/pci/controller/pci-thunder-pem.o: no symbols

The problem here is that the host drivers get built even when the configuration symbols are all disabled, as they pretend to not be drivers but are silently enabled because of the promise that ACPI based systems need no drivers.

Add back the normal symbols to have these drivers built, and change the logic to otherwise only build them when both CONFIG_PCI_QUIRKS and CONFIG_ACPI are enabled.

As a side-effect, this enables compile-testing the drivers on other architectures, which in turn needs the acpi_get_rc_resources() function to be defined.

Signed-off-by Arnd Bergmann <[email protected]>

---
 drivers/pci/controller/Makefile     | 7 ++++++-
 drivers/pci/controller/dwc/Makefile | 7 ++++++-
 2 files changed, 12 insertions(+), 2 deletions(-)

drivers/pci/controller/Makefile +6 -1

index e4559f2182f2..6d24a163033f 100644
@@ -11,10 +11,13 @@ obj-$(CONFIG_PCIE_RCAR_HOST) += pcie-rcar.o pcie-rcar-host.o
 obj-$(CONFIG_PCIE_RCAR_EP) += pcie-rcar.o pcie-rcar-ep.o
 obj-$(CONFIG_PCI_HOST_COMMON) += pci-host-common.o
 obj-$(CONFIG_PCI_HOST_GENERIC) += pci-host-generic.o
+obj-$(CONFIG_PCI_HOST_THUNDER_ECAM) += pci-thunder-ecam.o
+obj-$(CONFIG_PCI_HOST_THUNDER_PEM) += pci-thunder-pem.o
 obj-$(CONFIG_PCIE_XILINX) += pcie-xilinx.o
 obj-$(CONFIG_PCIE_XILINX_NWL) += pcie-xilinx-nwl.o
 obj-$(CONFIG_PCIE_XILINX_CPM) += pcie-xilinx-cpm.o
 obj-$(CONFIG_PCI_V3_SEMI) += pci-v3-semi.o
+obj-$(CONFIG_PCI_XGENE) += pci-xgene.o
 obj-$(CONFIG_PCI_XGENE_MSI) += pci-xgene-msi.o
 obj-$(CONFIG_PCI_VERSATILE) += pci-versatile.o
 obj-$(CONFIG_PCIE_IPROC) += pcie-iproc.o

@@ -47,8 +50,10 @@ obj-y				+= mobiveil/
 # ARM64 and use internal ifdefs to only build the pieces we need
 # depending on whether ACPI, the DT driver, or both are enabled.
 
-ifdef CONFIG_PCI
+ifdef CONFIG_ACPI
+ifdef CONFIG_PCI_QUIRKS
 obj-$(CONFIG_ARM64) += pci-thunder-ecam.o
 obj-$(CONFIG_ARM64) += pci-thunder-pem.o
 obj-$(CONFIG_ARM64) += pci-xgene.o
 endif
+endif

drivers/pci/controller/dwc/Makefile +6 -1

index a751553fa0db..ba7c42f6df6f 100644
@@ -31,7 +31,12 @@ obj-$(CONFIG_PCIE_UNIPHIER_EP) += pcie-uniphier-ep.o
 # ARM64 and use internal ifdefs to only build the pieces we need
 # depending on whether ACPI, the DT driver, or both are enabled.
 
-ifdef CONFIG_PCI
+obj-$(CONFIG_PCIE_AL) += pcie-al.o
+obj-$(CONFIG_PCI_HISI) += pcie-hisi.o
+
+ifdef CONFIG_ACPI
+ifdef CONFIG_PCI_QUIRKS
 obj-$(CONFIG_ARM64) += pcie-al.o
 obj-$(CONFIG_ARM64) += pcie-hisi.o
 endif
+endif

Signature · 1 line

2.29.2

Robert Richter

maintainer Reviewed-by on v1 2/2

2021-02-26 19:09 UTC #2 lore raw

Re: [PATCH 2/2] PCI: controller: avoid building empty drivers

Quoted 48 lines · Arnd Bergmann

From: Arnd Bergmann <[email protected]>
There are harmless warnings when compile testing the kernel with CONFIG_TRIM_UNUSED_KSYMS:
drivers/pci/controller/dwc/pcie-al.o: no symbols drivers/pci/controller/pci-thunder-ecam.o: no symbols drivers/pci/controller/pci-thunder-pem.o: no symbols
The problem here is that the host drivers get built even when the configuration symbols are all disabled, as they pretend to not be drivers but are silently enabled because of the promise that ACPI based systems need no drivers.
Add back the normal symbols to have these drivers built, and change the logic to otherwise only build them when both CONFIG_PCI_QUIRKS and CONFIG_ACPI are enabled.
As a side-effect, this enables compile-testing the drivers on other architectures, which in turn needs the acpi_get_rc_resources() function to be defined.
Signed-off-by Arnd Bergmann <[email protected]>
---
 drivers/pci/controller/Makefile     | 7 ++++++-
 drivers/pci/controller/dwc/Makefile | 7 ++++++-
 2 files changed, 12 insertions(+), 2 deletions(-)
drivers/pci/controller/Makefile +3 -0
index e4559f2182f2..6d24a163033f 100644
@@ -11,10 +11,13 @@ obj-$(CONFIG_PCIE_RCAR_HOST) += pcie-rcar.o pcie-rcar-host.o
 obj-$(CONFIG_PCIE_RCAR_EP) += pcie-rcar.o pcie-rcar-ep.o
 obj-$(CONFIG_PCI_HOST_COMMON) += pci-host-common.o
 obj-$(CONFIG_PCI_HOST_GENERIC) += pci-host-generic.o
+obj-$(CONFIG_PCI_HOST_THUNDER_ECAM) += pci-thunder-ecam.o
+obj-$(CONFIG_PCI_HOST_THUNDER_PEM) += pci-thunder-pem.o
 obj-$(CONFIG_PCIE_XILINX) += pcie-xilinx.o
 obj-$(CONFIG_PCIE_XILINX_NWL) += pcie-xilinx-nwl.o
 obj-$(CONFIG_PCIE_XILINX_CPM) += pcie-xilinx-cpm.o
 obj-$(CONFIG_PCI_V3_SEMI) += pci-v3-semi.o
+obj-$(CONFIG_PCI_XGENE) += pci-xgene.o
 obj-$(CONFIG_PCI_XGENE_MSI) += pci-xgene-msi.o
 obj-$(CONFIG_PCI_VERSATILE) += pci-versatile.o
 obj-$(CONFIG_PCIE_IPROC) += pcie-iproc.o
@@ -47,8 +50,10 @@ obj-y				+= mobiveil/
 # ARM64 and use internal ifdefs to only build the pieces we need

drivers/pci/controller/Makefile obj-y += mobiveil/ · line 59

Quoted 10 lines

drivers/pci/controller/Makefile +3 -1

 # depending on whether ACPI, the DT driver, or both are enabled.
 
-ifdef CONFIG_PCI
+ifdef CONFIG_ACPI
+ifdef CONFIG_PCI_QUIRKS
 obj-$(CONFIG_ARM64) += pci-thunder-ecam.o
 obj-$(CONFIG_ARM64) += pci-thunder-pem.o
 obj-$(CONFIG_ARM64) += pci-xgene.o
 endif
+endif

A possible double inclusion isn't really nice here, but it should work that way.

Also, the menu entry for the driver is in fact only for the OF case, as it is always included for ACPI even if the option is disabled (and thus the choice is useless). But this is unrelated to this patch.

Anyway:

Reviewed-by Robert Richter <[email protected]>

Quoted 21 lines

drivers/pci/controller/dwc/Makefile +6 -1

index a751553fa0db..ba7c42f6df6f 100644
@@ -31,7 +31,12 @@ obj-$(CONFIG_PCIE_UNIPHIER_EP) += pcie-uniphier-ep.o
 # ARM64 and use internal ifdefs to only build the pieces we need
 # depending on whether ACPI, the DT driver, or both are enabled.
 
-ifdef CONFIG_PCI
+obj-$(CONFIG_PCIE_AL) += pcie-al.o
+obj-$(CONFIG_PCI_HISI) += pcie-hisi.o
+
+ifdef CONFIG_ACPI
+ifdef CONFIG_PCI_QUIRKS
 obj-$(CONFIG_ARM64) += pcie-al.o
 obj-$(CONFIG_ARM64) += pcie-hisi.o
 endif
+endif

Signature · 1 line

2.29.2

Arnd Bergmann

author

2021-02-27 12:32 UTC #3 lore raw

Re: [PATCH 2/2] PCI: controller: avoid building empty drivers

Quoted 8 lines · Robert Richter

On 25.02.21 15:37:10, Arnd Bergmann wrote:
A possible double inclusion isn't really nice here, but it should work that way.
Also, the menu entry for the driver is in fact only for the OF case, as it is always included for ACPI even if the option is disabled (and thus the choice is useless). But this is unrelated to this patch.

Yes, I considered doing this using Kconfig syntax by adding another symbol for each affected driver and selecting those, but the Makefile hack seemed easier here.

Quoted 1 line

Reviewed-by Robert Richter <[email protected]>

Thanks,

Arnd

Kuppuswamy, Sathyanarayanan

2021-02-25 17:45 UTC #4 lore raw

In reply to Arnd Bergmann

Quoted 10 lines · Arnd Bergmann

From: Arnd Bergmann <[email protected]>
Compile-testing these drivers is currently broken. Enabling it causes a couple of build failures though:
drivers/pci/controller/pci-thunder-ecam.c:119:30: error: shift count >= width of type [-Werror,-Wshift-count-overflow] drivers/pci/controller/pci-thunder-pem.c:54:2: error: implicit declaration of function 'writeq' [-Werror,-Wimplicit-function-declaration] drivers/pci/controller/pci-thunder-pem.c:392:8: error: implicit declaration of function 'acpi_get_rc_resources' [-Werror,-Wimplicit-function-declaration]
Fix them with the obvious one-line changes.

Looks good to me.

Quoted 77 lines

Signed-off-by Arnd Bergmann <[email protected]>

---
  drivers/pci/controller/pci-thunder-ecam.c |  2 +-
  drivers/pci/controller/pci-thunder-pem.c  | 13 +++++++------
  drivers/pci/pci.h                         |  6 ++++++
  3 files changed, 14 insertions(+), 7 deletions(-)

drivers/pci/controller/pci-thunder-ecam.c +1 -1

index f964fd26f7e0..ffd84656544f 100644
@@ -116,7 +116,7 @@ static int thunder_ecam_p2_config_read(struct pci_bus *bus, unsigned int devfn,
  	 * the config space access window.  Since we are working with
  	 * the high-order 32 bits, shift everything down by 32 bits.
  	 */
-	node_bits = (cfg->res.start >> 32) & (1 << 12);
+	node_bits = upper_32_bits(cfg->res.start) & (1 << 12);
 
  	v |= node_bits;
  	set_val(v, where, size, val);

drivers/pci/controller/pci-thunder-pem.c +7 -6

index 1a3f70ac61fc..0660b9da204f 100644
@@ -12,6 +12,7 @@
  #include <linux/pci-acpi.h>
  #include <linux/pci-ecam.h>
  #include <linux/platform_device.h>
+#include <linux/io-64-nonatomic-lo-hi.h>
  #include "../pci.h"
 
  #if defined(CONFIG_PCI_HOST_THUNDER_PEM) || (defined(CONFIG_ACPI) && defined(CONFIG_PCI_QUIRKS))

@@ -324,9 +325,9 @@ static int thunder_pem_init(struct device *dev, struct pci_config_window *cfg,
  	 * structure here for the BAR.
  	 */
  	bar4_start = res_pem->start + 0xf00000;
-	pem_pci->ea_entry[0] = (u32)bar4_start | 2;
-	pem_pci->ea_entry[1] = (u32)(res_pem->end - bar4_start) & ~3u;
-	pem_pci->ea_entry[2] = (u32)(bar4_start >> 32);
+	pem_pci->ea_entry[0] = lower_32_bits(bar4_start) | 2;
+	pem_pci->ea_entry[1] = lower_32_bits(res_pem->end - bar4_start) & ~3u;
+	pem_pci->ea_entry[2] = upper_32_bits(bar4_start);
 
  	cfg->priv = pem_pci;
  	return 0;

@@ -334,9 +335,9 @@ static int thunder_pem_init(struct device *dev, struct pci_config_window *cfg,
 
  #if defined(CONFIG_ACPI) && defined(CONFIG_PCI_QUIRKS)
 
-#define PEM_RES_BASE		0x87e0c0000000UL
-#define PEM_NODE_MASK		GENMASK(45, 44)
-#define PEM_INDX_MASK		GENMASK(26, 24)
+#define PEM_RES_BASE		0x87e0c0000000ULL
+#define PEM_NODE_MASK		GENMASK_ULL(45, 44)
+#define PEM_INDX_MASK		GENMASK_ULL(26, 24)
  #define PEM_MIN_DOM_IN_NODE	4
  #define PEM_MAX_DOM_IN_NODE	10

drivers/pci/pci.h +6 -0

index 0a2b6d993fe1..022c2f433676 100644
@@ -625,6 +625,12 @@ static inline int pci_dev_specific_reset(struct pci_dev *dev, int probe)
  #if defined(CONFIG_PCI_QUIRKS) && defined(CONFIG_ARM64)
  int acpi_get_rc_resources(struct device *dev, const char *hid, u16 segment,
  			  struct resource *res);
+#else
+static inline int acpi_get_rc_resources(struct device *dev, const char *hid,
+					u16 segment, struct resource *res)
+{
+	return -ENODEV;
+}
  #endif
 
  int pci_rebar_get_current_size(struct pci_dev *pdev, int bar);

Signature · 7 lines

Sathyanarayanan Kuppuswamy
Linux Kernel Developer

_______________________________________________
linux-arm-kernel mailing list
[email protected]
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Bjorn Helgaas

2021-02-25 18:52 UTC #5 lore raw

Quoted 6 lines · Sathyanarayanan

Quoted 5 lines · Arnd Bergmann
From: Arnd Bergmann <[email protected]>
Compile-testing these drivers is currently broken. Enabling it causes a couple of build failures though:

Quoted 6 lines

Quoted 5 lines
drivers/pci/controller/pci-thunder-ecam.c:119:30: error: shift count >= width of type [-Werror,-Wshift-count-overflow] drivers/pci/controller/pci-thunder-pem.c:54:2: error: implicit declaration of function 'writeq' [-Werror,-Wimplicit-function-declaration] drivers/pci/controller/pci-thunder-pem.c:392:8: error: implicit declaration of function 'acpi_get_rc_resources' [-Werror,-Wimplicit-function-declaration]
Fix them with the obvious one-line changes.
Looks good to me.

Thanks for looking this over! I'd like to acknowledge your review, but I need an explicit Reviewed-by or similar. I don't want to put words in your mouth by converting "Looks good to me" to "Reviewed-by".

Kuppuswamy, Sathyanarayanan

Reviewed-by

2021-02-25 19:17 UTC #6 lore raw

Quoted 3 lines · Bjorn Helgaas

Thanks for looking this over! I'd like to acknowledge your review, but I need an explicit Reviewed-by or similar. I don't want to put words in your mouth by converting "Looks good to me" to "Reviewed-by".

will do so in future reviews.

Reviewed-by Kuppuswamy Sathyanarayanan <[email protected]>

Signature · 7 lines

Sathyanarayanan Kuppuswamy
Linux Kernel Developer

_______________________________________________
linux-arm-kernel mailing list
[email protected]
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Robert Richter

maintainer Reviewed-by on v1 1/2

2021-02-26 15:13 UTC #7 lore raw

In reply to Arnd Bergmann

Quoted 5 lines · Arnd Bergmann

From: Arnd Bergmann <[email protected]>
Compile-testing these drivers is currently broken. Enabling it causes a couple of build failures though:

Quoted 7 lines

drivers/pci/controller/pci-thunder-ecam.c:119:30: error: shift count >= width of type [-Werror,-Wshift-count-overflow] drivers/pci/controller/pci-thunder-pem.c:54:2: error: implicit declaration of function 'writeq' [-Werror,-Wimplicit-function-declaration] drivers/pci/controller/pci-thunder-pem.c:392:8: error: implicit declaration of function 'acpi_get_rc_resources' [-Werror,-Wimplicit-function-declaration]
Fix them with the obvious one-line changes.
Signed-off-by Arnd Bergmann <[email protected]>

Reviewed-by Robert Richter <[email protected]>

Quoted 5 lines

---
 drivers/pci/controller/pci-thunder-ecam.c |  2 +-
 drivers/pci/controller/pci-thunder-pem.c  | 13 +++++++------
 drivers/pci/pci.h                         |  6 ++++++
 3 files changed, 14 insertions(+), 7 deletions(-)