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author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-10-28 21:20:44 (GMT) |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-10-28 21:20:44 (GMT) |
commit | 0e59e7e7feb5a12938fbf9135147eeda3238c6c4 (patch) | |
tree | dbe994369ca9cad6893f0fd710f75791bc84b816 /drivers/pci/pci.c | |
parent | 46b51ea2099fa2082342e52b8284aa828429b80b (diff) | |
parent | a513a99a7cebfb452839cc09c9c0586f72d96414 (diff) | |
download | linux-fsl-qoriq-0e59e7e7feb5a12938fbf9135147eeda3238c6c4.tar.xz |
Merge branch 'next-rebase' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci
* 'next-rebase' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci:
PCI: Clean-up MPS debug output
pci: Clamp pcie_set_readrq() when using "performance" settings
PCI: enable MPS "performance" setting to properly handle bridge MPS
PCI: Workaround for Intel MPS errata
PCI: Add support for PASID capability
PCI: Add implementation for PRI capability
PCI: Export ATS functions to modules
PCI: Move ATS implementation into own file
PCI / PM: Remove unnecessary error variable from acpi_dev_run_wake()
PCI hotplug: acpiphp: Prevent deadlock on PCI-to-PCI bridge remove
PCI / PM: Extend PME polling to all PCI devices
PCI quirk: mmc: Always check for lower base frequency quirk for Ricoh 1180:e823
PCI: Make pci_setup_bridge() non-static for use by arch code
x86: constify PCI raw ops structures
PCI: Add quirk for known incorrect MPSS
PCI: Add Solarflare vendor ID and SFC4000 device IDs
Diffstat (limited to 'drivers/pci/pci.c')
-rw-r--r-- | drivers/pci/pci.c | 59 |
1 files changed, 36 insertions, 23 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index e9651f0..6f45a73 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -1407,13 +1407,16 @@ bool pci_check_pme_status(struct pci_dev *dev) /** * pci_pme_wakeup - Wake up a PCI device if its PME Status bit is set. * @dev: Device to handle. - * @ign: Ignored. + * @pme_poll_reset: Whether or not to reset the device's pme_poll flag. * * Check if @dev has generated PME and queue a resume request for it in that * case. */ -static int pci_pme_wakeup(struct pci_dev *dev, void *ign) +static int pci_pme_wakeup(struct pci_dev *dev, void *pme_poll_reset) { + if (pme_poll_reset && dev->pme_poll) + dev->pme_poll = false; + if (pci_check_pme_status(dev)) { pci_wakeup_event(dev); pm_request_resume(&dev->dev); @@ -1428,7 +1431,7 @@ static int pci_pme_wakeup(struct pci_dev *dev, void *ign) void pci_pme_wakeup_bus(struct pci_bus *bus) { if (bus) - pci_walk_bus(bus, pci_pme_wakeup, NULL); + pci_walk_bus(bus, pci_pme_wakeup, (void *)true); } /** @@ -1446,31 +1449,26 @@ bool pci_pme_capable(struct pci_dev *dev, pci_power_t state) static void pci_pme_list_scan(struct work_struct *work) { - struct pci_pme_device *pme_dev; + struct pci_pme_device *pme_dev, *n; mutex_lock(&pci_pme_list_mutex); if (!list_empty(&pci_pme_list)) { - list_for_each_entry(pme_dev, &pci_pme_list, list) - pci_pme_wakeup(pme_dev->dev, NULL); - schedule_delayed_work(&pci_pme_work, msecs_to_jiffies(PME_TIMEOUT)); + list_for_each_entry_safe(pme_dev, n, &pci_pme_list, list) { + if (pme_dev->dev->pme_poll) { + pci_pme_wakeup(pme_dev->dev, NULL); + } else { + list_del(&pme_dev->list); + kfree(pme_dev); + } + } + if (!list_empty(&pci_pme_list)) + schedule_delayed_work(&pci_pme_work, + msecs_to_jiffies(PME_TIMEOUT)); } mutex_unlock(&pci_pme_list_mutex); } /** - * pci_external_pme - is a device an external PCI PME source? - * @dev: PCI device to check - * - */ - -static bool pci_external_pme(struct pci_dev *dev) -{ - if (pci_is_pcie(dev) || dev->bus->number == 0) - return false; - return true; -} - -/** * pci_pme_active - enable or disable PCI device's PME# function * @dev: PCI device to handle. * @enable: 'true' to enable PME# generation; 'false' to disable it. @@ -1503,7 +1501,7 @@ void pci_pme_active(struct pci_dev *dev, bool enable) hit, and the power savings from the devices will still be a win. */ - if (pci_external_pme(dev)) { + if (dev->pme_poll) { struct pci_pme_device *pme_dev; if (enable) { pme_dev = kmalloc(sizeof(struct pci_pme_device), @@ -1821,6 +1819,7 @@ void pci_pm_init(struct pci_dev *dev) (pmc & PCI_PM_CAP_PME_D3) ? " D3hot" : "", (pmc & PCI_PM_CAP_PME_D3cold) ? " D3cold" : ""); dev->pme_support = pmc >> PCI_PM_CAP_PME_SHIFT; + dev->pme_poll = true; /* * Make device's PM flags reflect the wake-up capability, but * let the user space enable it to wake up the system as needed. @@ -3203,8 +3202,6 @@ int pcie_set_readrq(struct pci_dev *dev, int rq) if (rq < 128 || rq > 4096 || !is_power_of_2(rq)) goto out; - v = (ffs(rq) - 8) << 12; - cap = pci_pcie_cap(dev); if (!cap) goto out; @@ -3212,6 +3209,22 @@ int pcie_set_readrq(struct pci_dev *dev, int rq) err = pci_read_config_word(dev, cap + PCI_EXP_DEVCTL, &ctl); if (err) goto out; + /* + * If using the "performance" PCIe config, we clamp the + * read rq size to the max packet size to prevent the + * host bridge generating requests larger than we can + * cope with + */ + if (pcie_bus_config == PCIE_BUS_PERFORMANCE) { + int mps = pcie_get_mps(dev); + + if (mps < 0) + return mps; + if (mps < rq) + rq = mps; + } + + v = (ffs(rq) - 8) << 12; if ((ctl & PCI_EXP_DEVCTL_READRQ) != v) { ctl &= ~PCI_EXP_DEVCTL_READRQ; |