From 6a73336bde293741026614135419e9b76afb9145 Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Fri, 12 Sep 2014 08:50:10 -0600 Subject: [PATCH 1/3] PCI: Remove "no hotplug settings from platform" warning We print way too many messages like this: pci 0000:00:00.0: no hotplug settings from platform pci 0000:00:00.0: using default PCI settings This usually happens when the platform doesn't supply an ACPI _HPP method, but the method is optional, so there's no point in warning about it. Not only are the messages useless, but we call pci_configure_slot() far too many times, so they're repeated many times. I'll fix the overuse of pci_configure_slot() too, but that will wait until the next merge window. For now, just remove both log messages. Link: https://bugzilla.kernel.org/show_bug.cgi?id=84391 Signed-off-by: Bjorn Helgaas Acked-by: Yinghai Lu --- drivers/pci/hotplug/pcihp_slot.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) diff --git a/drivers/pci/hotplug/pcihp_slot.c b/drivers/pci/hotplug/pcihp_slot.c index e246a10a0d2c5..3e36ec8d708af 100644 --- a/drivers/pci/hotplug/pcihp_slot.c +++ b/drivers/pci/hotplug/pcihp_slot.c @@ -46,7 +46,6 @@ static void program_hpp_type0(struct pci_dev *dev, struct hpp_type0 *hpp) */ if (pci_is_pcie(dev)) return; - dev_info(&dev->dev, "using default PCI settings\n"); hpp = &pci_default_type0; } @@ -153,7 +152,6 @@ void pci_configure_slot(struct pci_dev *dev) { struct pci_dev *cdev; struct hotplug_params hpp; - int ret; if (!(dev->hdr_type == PCI_HEADER_TYPE_NORMAL || (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE && @@ -163,9 +161,7 @@ void pci_configure_slot(struct pci_dev *dev) pcie_bus_configure_settings(dev->bus); memset(&hpp, 0, sizeof(hpp)); - ret = pci_get_hp_params(dev, &hpp); - if (ret) - dev_warn(&dev->dev, "no hotplug settings from platform\n"); + pci_get_hp_params(dev, &hpp); program_hpp_type2(dev, hpp.t2); program_hpp_type1(dev, hpp.t1); From 86fd887b7fe350819dae5b55e7fef05b511c8656 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bruno=20Pr=C3=A9mont?= Date: Sun, 24 Aug 2014 23:09:53 +0200 Subject: [PATCH 2/3] vgaarb: Don't default exclusively to first video device with mem+io MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Commit 20cde694027e ("x86, ia64: Move EFI_FB vga_default_device() initialization to pci_vga_fixup()") moved boot video device detection from efifb to x86 and ia64 pci/fixup.c. For dual-GPU Apple computers above change represents a regression as code in efifb did forcefully override vga_default_device while the merge did not (vgaarb happens prior to PCI fixup). To improve on initial device selection by vgaarb (it cannot know if PCI device not behind bridges see/decode legacy VGA I/O or not), move the screen_info based check from pci_video_fixup() to vgaarb's init function and use it to refine/override decision taken while adding the individual PCI VGA devices. This way PCI fixup has no reason to adjust vga_default_device anymore but can depend on its value for flagging shadowed VBIOS. This has the nice benefit of removing duplicated code but does introduce a #if defined() block in vgaarb. Not all architectures have screen_info and would cause compile to fail without it. Link: https://bugzilla.kernel.org/show_bug.cgi?id=84461 Reported-and-Tested-By: Andreas Noever Signed-off-by: Bruno Prémont Signed-off-by: Bjorn Helgaas CC: Matthew Garrett CC: stable@vger.kernel.org # v3.5+ --- arch/ia64/pci/fixup.c | 24 +----------------------- arch/x86/pci/fixup.c | 24 +----------------------- drivers/gpu/vga/vgaarb.c | 38 +++++++++++++++++++++++++++++++++++++- 3 files changed, 39 insertions(+), 47 deletions(-) diff --git a/arch/ia64/pci/fixup.c b/arch/ia64/pci/fixup.c index ec73b2cf912a4..fc505d58f078e 100644 --- a/arch/ia64/pci/fixup.c +++ b/arch/ia64/pci/fixup.c @@ -38,27 +38,6 @@ static void pci_fixup_video(struct pci_dev *pdev) return; /* Maybe, this machine supports legacy memory map. */ - if (!vga_default_device()) { - resource_size_t start, end; - int i; - - /* Does firmware framebuffer belong to us? */ - for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { - if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM)) - continue; - - start = pci_resource_start(pdev, i); - end = pci_resource_end(pdev, i); - - if (!start || !end) - continue; - - if (screen_info.lfb_base >= start && - (screen_info.lfb_base + screen_info.lfb_size) < end) - vga_set_default_device(pdev); - } - } - /* Is VGA routed to us? */ bus = pdev->bus; while (bus) { @@ -83,8 +62,7 @@ static void pci_fixup_video(struct pci_dev *pdev) pci_read_config_word(pdev, PCI_COMMAND, &config); if (config & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) { pdev->resource[PCI_ROM_RESOURCE].flags |= IORESOURCE_ROM_SHADOW; - dev_printk(KERN_DEBUG, &pdev->dev, "Boot video device\n"); - vga_set_default_device(pdev); + dev_printk(KERN_DEBUG, &pdev->dev, "Video device with shadowed ROM\n"); } } } diff --git a/arch/x86/pci/fixup.c b/arch/x86/pci/fixup.c index c61ea57d1ba1d..9a2b7101ae8af 100644 --- a/arch/x86/pci/fixup.c +++ b/arch/x86/pci/fixup.c @@ -326,27 +326,6 @@ static void pci_fixup_video(struct pci_dev *pdev) struct pci_bus *bus; u16 config; - if (!vga_default_device()) { - resource_size_t start, end; - int i; - - /* Does firmware framebuffer belong to us? */ - for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { - if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM)) - continue; - - start = pci_resource_start(pdev, i); - end = pci_resource_end(pdev, i); - - if (!start || !end) - continue; - - if (screen_info.lfb_base >= start && - (screen_info.lfb_base + screen_info.lfb_size) < end) - vga_set_default_device(pdev); - } - } - /* Is VGA routed to us? */ bus = pdev->bus; while (bus) { @@ -371,8 +350,7 @@ static void pci_fixup_video(struct pci_dev *pdev) pci_read_config_word(pdev, PCI_COMMAND, &config); if (config & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) { pdev->resource[PCI_ROM_RESOURCE].flags |= IORESOURCE_ROM_SHADOW; - dev_printk(KERN_DEBUG, &pdev->dev, "Boot video device\n"); - vga_set_default_device(pdev); + dev_printk(KERN_DEBUG, &pdev->dev, "Video device with shadowed ROM\n"); } } } diff --git a/drivers/gpu/vga/vgaarb.c b/drivers/gpu/vga/vgaarb.c index d2077f040f3ec..24ac52e6cd411 100644 --- a/drivers/gpu/vga/vgaarb.c +++ b/drivers/gpu/vga/vgaarb.c @@ -41,6 +41,7 @@ #include #include #include +#include #include @@ -585,8 +586,11 @@ static bool vga_arbiter_add_pci_device(struct pci_dev *pdev) */ #ifndef __ARCH_HAS_VGA_DEFAULT_DEVICE if (vga_default == NULL && - ((vgadev->owns & VGA_RSRC_LEGACY_MASK) == VGA_RSRC_LEGACY_MASK)) + ((vgadev->owns & VGA_RSRC_LEGACY_MASK) == VGA_RSRC_LEGACY_MASK)) { + pr_info("vgaarb: setting as boot device: PCI:%s\n", + pci_name(pdev)); vga_set_default_device(pdev); + } #endif vga_arbiter_check_bridge_sharing(vgadev); @@ -1320,6 +1324,38 @@ static int __init vga_arb_device_init(void) pr_info("vgaarb: loaded\n"); list_for_each_entry(vgadev, &vga_list, list) { +#if defined(CONFIG_X86) || defined(CONFIG_IA64) + /* Override I/O based detection done by vga_arbiter_add_pci_device() + * as it may take the wrong device (e.g. on Apple system under EFI). + * + * Select the device owning the boot framebuffer if there is one. + */ + resource_size_t start, end; + int i; + + /* Does firmware framebuffer belong to us? */ + for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { + if (!(pci_resource_flags(vgadev->pdev, i) & IORESOURCE_MEM)) + continue; + + start = pci_resource_start(vgadev->pdev, i); + end = pci_resource_end(vgadev->pdev, i); + + if (!start || !end) + continue; + + if (screen_info.lfb_base < start || + (screen_info.lfb_base + screen_info.lfb_size) >= end) + continue; + if (!vga_default_device()) + pr_info("vgaarb: setting as boot device: PCI:%s\n", + pci_name(vgadev->pdev)); + else if (vgadev->pdev != vga_default_device()) + pr_info("vgaarb: overriding boot device: PCI:%s\n", + pci_name(vgadev->pdev)); + vga_set_default_device(vgadev->pdev); + } +#endif if (vgadev->bridge_has_one_vga) pr_info("vgaarb: bridge control possible %s\n", pci_name(vgadev->pdev)); else From ce6eacb07e287c0c3c8b5c316a9a7f9cecf69e95 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bruno=20Pr=C3=A9mont?= Date: Sun, 24 Aug 2014 23:13:15 +0200 Subject: [PATCH 3/3] vgaarb: Drop obsolete #ifndef MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Commit 20cde694027e ("x86, ia64: Move EFI_FB vga_default_device() initialization to pci_vga_fixup()") moved boot video device detection from efifb to x86 and ia64 pci/fixup.c. Remove the left-over #ifndef check that will always match since the corresponding arch-specific define is gone with above patch. Signed-off-by: Bruno Prémont Signed-off-by: Bjorn Helgaas CC: Matthew Garrett --- drivers/gpu/vga/vgaarb.c | 8 -------- include/linux/vgaarb.h | 2 -- 2 files changed, 10 deletions(-) diff --git a/drivers/gpu/vga/vgaarb.c b/drivers/gpu/vga/vgaarb.c index 24ac52e6cd411..77711623b9739 100644 --- a/drivers/gpu/vga/vgaarb.c +++ b/drivers/gpu/vga/vgaarb.c @@ -113,10 +113,8 @@ static int vga_str_to_iostate(char *buf, int str_size, int *io_state) return 1; } -#ifndef __ARCH_HAS_VGA_DEFAULT_DEVICE /* this is only used a cookie - it should not be dereferenced */ static struct pci_dev *vga_default; -#endif static void vga_arb_device_card_gone(struct pci_dev *pdev); @@ -132,7 +130,6 @@ static struct vga_device *vgadev_find(struct pci_dev *pdev) } /* Returns the default VGA device (vgacon's babe) */ -#ifndef __ARCH_HAS_VGA_DEFAULT_DEVICE struct pci_dev *vga_default_device(void) { return vga_default; @@ -148,7 +145,6 @@ void vga_set_default_device(struct pci_dev *pdev) pci_dev_put(vga_default); vga_default = pci_dev_get(pdev); } -#endif static inline void vga_irq_set_state(struct vga_device *vgadev, bool state) { @@ -584,14 +580,12 @@ static bool vga_arbiter_add_pci_device(struct pci_dev *pdev) /* Deal with VGA default device. Use first enabled one * by default if arch doesn't have it's own hook */ -#ifndef __ARCH_HAS_VGA_DEFAULT_DEVICE if (vga_default == NULL && ((vgadev->owns & VGA_RSRC_LEGACY_MASK) == VGA_RSRC_LEGACY_MASK)) { pr_info("vgaarb: setting as boot device: PCI:%s\n", pci_name(pdev)); vga_set_default_device(pdev); } -#endif vga_arbiter_check_bridge_sharing(vgadev); @@ -625,10 +619,8 @@ static bool vga_arbiter_del_pci_device(struct pci_dev *pdev) goto bail; } -#ifndef __ARCH_HAS_VGA_DEFAULT_DEVICE if (vga_default == pdev) vga_set_default_device(NULL); -#endif if (vgadev->decodes & (VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM)) vga_decode_count--; diff --git a/include/linux/vgaarb.h b/include/linux/vgaarb.h index 2c02f3a8d2ba3..c37bd4d067390 100644 --- a/include/linux/vgaarb.h +++ b/include/linux/vgaarb.h @@ -182,7 +182,6 @@ extern void vga_put(struct pci_dev *pdev, unsigned int rsrc); * vga_get()... */ -#ifndef __ARCH_HAS_VGA_DEFAULT_DEVICE #ifdef CONFIG_VGA_ARB extern struct pci_dev *vga_default_device(void); extern void vga_set_default_device(struct pci_dev *pdev); @@ -190,7 +189,6 @@ extern void vga_set_default_device(struct pci_dev *pdev); static inline struct pci_dev *vga_default_device(void) { return NULL; }; static inline void vga_set_default_device(struct pci_dev *pdev) { }; #endif -#endif /** * vga_conflicts