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Merge tag 'pci-v5.10-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Browse Source 
Pull PCI updates from Bjorn Helgaas:
 "Enumeration:
   - Print IRQ number used by PCIe Link Bandwidth Notification (Dongdong
     Liu)
   - Add schedule point in pci_read_config() to reduce max latency
     (Jiang Biao)
   - Add Kconfig options for MPS/MRRS strategy (Jim Quinlan)

  Resource management:
   - Fix pci_iounmap() memory leak when !CONFIG_GENERIC_IOMAP (Lorenzo
     Pieralisi)

  PCIe native device hotplug:
   - Reduce noisiness on hot removal (Lukas Wunner)

  Power management:
   - Revert "PCI/PM: Apply D2 delay as milliseconds, not microseconds"
     that was done on the basis of spec typo (Bjorn Helgaas)
   - Rename pci_dev.d3_delay to d3hot_delay to remove D3hot/D3cold
     ambiguity (Krzysztof Wilczyński)
   - Remove unused pcibios_pm_ops (Vaibhav Gupta)

  IOMMU:
   - Enable Translation Blocking for external devices to harden against
     DMA attacks (Rajat Jain)

  Error handling:
   - Add an ACPI APEI notifier chain for vendor CPER records to enable
     device-specific error handling (Shiju Jose)

  ASPM:
   - Remove struct aspm_register_info to simplify code (Saheed O.
     Bolarinwa)

  Amlogic Meson PCIe controller driver:
   - Build as module by default (Kevin Hilman)

  Ampere Altra PCIe controller driver:
   - Add MCFG quirk to work around non-standard ECAM implementation
     (Tuan Phan)

  Broadcom iProc PCIe controller driver:
   - Set affinity mask on MSI interrupts (Mark Tomlinson)

  Broadcom STB PCIe controller driver:
   - Make PCIE_BRCMSTB depend on ARCH_BRCMSTB (Jim Quinlan)
   - Add DT bindings for more Brcmstb chips (Jim Quinlan)
   - Add bcm7278 register info (Jim Quinlan)
   - Add bcm7278 PERST# support (Jim Quinlan)
   - Add suspend and resume pm_ops (Jim Quinlan)
   - Add control of rescal reset (Jim Quinlan)
   - Set additional internal memory DMA viewport sizes (Jim Quinlan)
   - Accommodate MSI for older chips (Jim Quinlan)
   - Set bus max burst size by chip type (Jim Quinlan)
   - Add support for bcm7211, bcm7216, bcm7445, bcm7278 (Jim Quinlan)

  Freescale i.MX6 PCIe controller driver:
   - Use dev_err_probe() to reduce redundant messages (Anson Huang)

  Freescale Layerscape PCIe controller driver:
   - Enforce 4K DMA buffer alignment in endpoint test (Hou Zhiqiang)
   - Add DT compatible strings for ls1088a, ls2088a (Xiaowei Bao)
   - Add endpoint support for ls1088a, ls2088a (Xiaowei Bao)
   - Add endpoint test support for lS1088a (Xiaowei Bao)
   - Add MSI-X support for ls1088a (Xiaowei Bao)

  HiSilicon HIP PCIe controller driver:
   - Handle HIP-specific errors via ACPI APEI (Yicong Yang)

  HiSilicon Kirin PCIe controller driver:
   - Return -EPROBE_DEFER if the GPIO isn't ready (Bean Huo)

  Intel VMD host bridge driver:
   - Factor out physical offset, bus offset, IRQ domain, IRQ allocation
     (Jon Derrick)
   - Use generic PCI PM correctly (Jon Derrick)

  Marvell Aardvark PCIe controller driver:
   - Fix compilation on s390 (Pali Rohár)
   - Implement driver 'remove' function and allow to build it as module
     (Pali Rohár)
   - Move PCIe reset card code to advk_pcie_train_link() (Pali Rohár)
   - Convert mvebu a3700 internal SMCC firmware return codes to errno
     (Pali Rohár)
   - Fix initialization with old Marvell's Arm Trusted Firmware (Pali
     Rohár)

  Microsoft Hyper-V host bridge driver:
   - Fix hibernation in case interrupts are not re-created (Dexuan Cui)

  NVIDIA Tegra PCIe controller driver:
   - Stop checking return value of debugfs_create() functions (Greg
     Kroah-Hartman)
   - Convert to use DEFINE_SEQ_ATTRIBUTE macro (Liu Shixin)

  Qualcomm PCIe controller driver:
   - Reset PCIe to work around Qsdk U-Boot issue (Ansuel Smith)

  Renesas R-Car PCIe controller driver:
   - Add DT documentation for r8a774a1, r8a774b1, r8a774e1 endpoints
     (Lad Prabhakar)
   - Add RZ/G2M, RZ/G2N, RZ/G2H IDs to endpoint test (Lad Prabhakar)
   - Add DT support for r8a7742 (Lad Prabhakar)

  Socionext UniPhier Pro5 controller driver:
   - Add DT descriptions of iATU register (host and endpoint) (Kunihiko
     Hayashi)

  Synopsys DesignWare PCIe controller driver:
   - Add link up check in dw_child_pcie_ops.map_bus() (racy, but seems
     unavoidable) (Hou Zhiqiang)
   - Fix endpoint Header Type check so multi-function devices work (Hou
     Zhiqiang)
   - Skip PCIE_MSI_INTR0* programming if MSI is disabled (Jisheng Zhang)
   - Stop leaking MSI page in suspend/resume (Jisheng Zhang)
   - Add common iATU register support instead of keystone-specific code
     (Kunihiko Hayashi)
   - Major config space access and other cleanups in dwc core and
     drivers that use it (al, exynos, histb, imx6, intel-gw, keystone,
     kirin, meson, qcom, tegra) (Rob Herring)
   - Add multiple PFs support for endpoint (Xiaowei Bao)
   - Add MSI-X doorbell mode in endpoint mode (Xiaowei Bao)

  Miscellaneous:
   - Use fallthrough pseudo-keyword (Gustavo A. R. Silva)
   - Fix "0 used as NULL pointer" warnings (Gustavo Pimentel)
   - Fix "cast truncates bits from constant value" warnings (Gustavo
     Pimentel)
   - Remove redundant zeroing for sg_init_table() (Julia Lawall)
   - Use scnprintf(), not snprintf(), in sysfs "show" functions
     (Krzysztof Wilczyński)
   - Remove unused assignments (Krzysztof Wilczyński)
   - Fix "0 used as NULL pointer" warning (Krzysztof Wilczyński)
   - Simplify bool comparisons (Krzysztof Wilczyński)
   - Use for_each_child_of_node() and for_each_node_by_name() (Qinglang
     Miao)
   - Simplify return expressions (Qinglang Miao)"

* tag 'pci-v5.10-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (147 commits)
  PCI: vmd: Update VMD PM to correctly use generic PCI PM
  PCI: vmd: Create IRQ allocation helper
  PCI: vmd: Create IRQ Domain configuration helper
  PCI: vmd: Create bus offset configuration helper
  PCI: vmd: Create physical offset helper
  PCI: v3-semi: Remove unneeded break
  PCI: dwc: Add link up check in dw_child_pcie_ops.map_bus()
  PCI/ASPM: Remove struct pcie_link_state.l1ss
  PCI/ASPM: Remove struct aspm_register_info.l1ss_cap
  PCI/ASPM: Pass L1SS Capabilities value, not struct aspm_register_info
  PCI/ASPM: Remove struct aspm_register_info.l1ss_ctl1
  PCI/ASPM: Remove struct aspm_register_info.l1ss_ctl2 (unused)
  PCI/ASPM: Remove struct aspm_register_info.l1ss_cap_ptr
  PCI/ASPM: Remove struct aspm_register_info.latency_encoding
  PCI/ASPM: Remove struct aspm_register_info.enabled
  PCI/ASPM: Remove struct aspm_register_info.support
  PCI/ASPM: Use 'parent' and 'child' for readability
  PCI/ASPM: Move LTR path check to where it's used
  PCI/ASPM: Move pci_clear_and_set_dword() earlier
  PCI: dwc: Fix MSI page leakage in suspend/resume
  ...
This commit is contained in:
Linus Torvalds
2020-10-22 12:41:00 -07:00
parent 96485e4462 28e34e751f
commit 00937f36b0
85 changed files with 2551 additions and 1792 deletions
Download Patch File Download Diff File Expand all files Collapse all files

54
drivers/pci/pci.c
View File

@@ -15,7 +15,6 @@
#include <linux/init.h>
#include <linux/msi.h>
#include <linux/of.h>
#include <linux/of_pci.h>
#include <linux/pci.h>
#include <linux/pm.h>
#include <linux/slab.h>
@@ -30,8 +29,6 @@
#include <linux/pm_runtime.h>
#include <linux/pci_hotplug.h>
#include <linux/vmalloc.h>
#include <linux/pci-ats.h>
#include <asm/setup.h>
#include <asm/dma.h>
#include <linux/aer.h>
#include "pci.h"
@@ -49,7 +46,7 @@ EXPORT_SYMBOL(isa_dma_bridge_buggy);
int pci_pci_problems;
EXPORT_SYMBOL(pci_pci_problems);
unsigned int pci_pm_d3_delay;
unsigned int pci_pm_d3hot_delay;
static void pci_pme_list_scan(struct work_struct *work);
@@ -66,10 +63,10 @@ struct pci_pme_device {
static void pci_dev_d3_sleep(struct pci_dev *dev)
{
unsigned int delay = dev->d3_delay;
unsigned int delay = dev->d3hot_delay;
if (delay < pci_pm_d3_delay)
delay = pci_pm_d3_delay;
if (delay < pci_pm_d3hot_delay)
delay = pci_pm_d3hot_delay;
if (delay)
msleep(delay);
@@ -101,7 +98,19 @@ unsigned long pci_hotplug_mmio_pref_size = DEFAULT_HOTPLUG_MMIO_PREF_SIZE;
#define DEFAULT_HOTPLUG_BUS_SIZE 1
unsigned long pci_hotplug_bus_size = DEFAULT_HOTPLUG_BUS_SIZE;
/* PCIe MPS/MRRS strategy; can be overridden by kernel command-line param */
#ifdef CONFIG_PCIE_BUS_TUNE_OFF
enum pcie_bus_config_types pcie_bus_config = PCIE_BUS_TUNE_OFF;
#elif defined CONFIG_PCIE_BUS_SAFE
enum pcie_bus_config_types pcie_bus_config = PCIE_BUS_SAFE;
#elif defined CONFIG_PCIE_BUS_PERFORMANCE
enum pcie_bus_config_types pcie_bus_config = PCIE_BUS_PERFORMANCE;
#elif defined CONFIG_PCIE_BUS_PEER2PEER
enum pcie_bus_config_types pcie_bus_config = PCIE_BUS_PEER2PEER;
#else
enum pcie_bus_config_types pcie_bus_config = PCIE_BUS_DEFAULT;
#endif
/*
* The default CLS is used if arch didn't set CLS explicitly and not
@@ -876,6 +885,10 @@ static void pci_std_enable_acs(struct pci_dev *dev)
/* Upstream Forwarding */
ctrl |= (cap & PCI_ACS_UF);
/* Enable Translation Blocking for external devices */
if (dev->external_facing || dev->untrusted)
ctrl |= (cap & PCI_ACS_TB);
pci_write_config_word(dev, pos + PCI_ACS_CTRL, ctrl);
}
@@ -1065,7 +1078,7 @@ static int pci_raw_set_power_state(struct pci_dev *dev, pci_power_t state)
if (state == PCI_D3hot || dev->current_state == PCI_D3hot)
pci_dev_d3_sleep(dev);
else if (state == PCI_D2 || dev->current_state == PCI_D2)
msleep(PCI_PM_D2_DELAY);
udelay(PCI_PM_D2_DELAY);
pci_read_config_word(dev, dev->pm_cap + PCI_PM_CTRL, &pmcsr);
dev->current_state = (pmcsr & PCI_PM_CTRL_STATE_MASK);
@@ -3013,7 +3026,7 @@ void pci_pm_init(struct pci_dev *dev)
}
dev->pm_cap = pm;
dev->d3_delay = PCI_PM_D3_WAIT;
dev->d3hot_delay = PCI_PM_D3HOT_WAIT;
dev->d3cold_delay = PCI_PM_D3COLD_WAIT;
dev->bridge_d3 = pci_bridge_d3_possible(dev);
dev->d3cold_allowed = true;
@@ -3038,7 +3051,7 @@ void pci_pm_init(struct pci_dev *dev)
(pmc & PCI_PM_CAP_PME_D0) ? " D0" : "",
(pmc & PCI_PM_CAP_PME_D1) ? " D1" : "",
(pmc & PCI_PM_CAP_PME_D2) ? " D2" : "",
(pmc & PCI_PM_CAP_PME_D3) ? " D3hot" : "",
(pmc & PCI_PM_CAP_PME_D3hot) ? " D3hot" : "",
(pmc & PCI_PM_CAP_PME_D3cold) ? " D3cold" : "");
dev->pme_support = pmc >> PCI_PM_CAP_PME_SHIFT;
dev->pme_poll = true;
@@ -4621,7 +4634,7 @@ static int pci_af_flr(struct pci_dev *dev, int probe)
*
* NOTE: This causes the caller to sleep for twice the device power transition
* cooldown period, which for the D0->D3hot and D3hot->D0 transitions is 10 ms
* by default (i.e. unless the @dev's d3_delay field has a different value).
* by default (i.e. unless the @dev's d3hot_delay field has a different value).
* Moreover, only devices in D0 can be reset by this function.
*/
static int pci_pm_reset(struct pci_dev *dev, int probe)
@@ -4701,9 +4714,7 @@ static bool pcie_wait_for_link_delay(struct pci_dev *pdev, bool active,
}
if (active && ret)
msleep(delay);
else if (ret != active)
pci_info(pdev, "Data Link Layer Link Active not %s in 1000 msec\n",
active ? "set" : "cleared");
return ret == active;
}
@@ -4828,6 +4839,7 @@ void pci_bridge_wait_for_secondary_bus(struct pci_dev *dev)
delay);
if (!pcie_wait_for_link_delay(dev, true, delay)) {
/* Did not train, no need to wait any further */
pci_info(dev, "Data Link Layer Link Active not set in 1000 msec\n");
return;
}
}
@@ -4920,16 +4932,10 @@ static int pci_reset_hotplug_slot(struct hotplug_slot *hotplug, int probe)
static int pci_dev_reset_slot_function(struct pci_dev *dev, int probe)
{
struct pci_dev *pdev;
if (dev->subordinate || !dev->slot ||
if (dev->multifunction || dev->subordinate || !dev->slot ||
dev->dev_flags & PCI_DEV_FLAGS_NO_BUS_RESET)
return -ENOTTY;
list_for_each_entry(pdev, &dev->bus->devices, bus_list)
if (pdev != dev && pdev->slot == dev->slot)
return -ENOTTY;
return pci_reset_hotplug_slot(dev->slot->hotplug, probe);
}
@@ -6005,7 +6011,7 @@ int pci_set_vga_state(struct pci_dev *dev, bool decode,
if (flags & PCI_VGA_STATE_CHANGE_DECODES) {
pci_read_config_word(dev, PCI_COMMAND, &cmd);
if (decode == true)
if (decode)
cmd |= command_bits;
else
cmd &= ~command_bits;
@@ -6021,7 +6027,7 @@ int pci_set_vga_state(struct pci_dev *dev, bool decode,
if (bridge) {
pci_read_config_word(bridge, PCI_BRIDGE_CONTROL,
&cmd);
if (decode == true)
if (decode)
cmd |= PCI_BRIDGE_CTL_VGA;
else
cmd &= ~PCI_BRIDGE_CTL_VGA;
@@ -6350,7 +6356,7 @@ static ssize_t resource_alignment_show(struct bus_type *bus, char *buf)
spin_lock(&resource_alignment_lock);
if (resource_alignment_param)
count = snprintf(buf, PAGE_SIZE, "%s", resource_alignment_param);
count = scnprintf(buf, PAGE_SIZE, "%s", resource_alignment_param);
spin_unlock(&resource_alignment_lock);
/*