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author | 2015-07-17 15:15:19 -0500 | |
---|---|---|
committer | 2015-08-13 15:57:21 -0500 | |
commit | d544d75ac96aa1b0a8a378826626a0fbd8ce4380 (patch) | |
tree | c289b1bd150373bfea74cbf2a224d9bd2569ae28 /drivers/pci/ats.c | |
parent | PCI: Allocate ATS struct during enumeration (diff) | |
download | linux-d544d75ac96aa1b0a8a378826626a0fbd8ce4380.tar.gz linux-d544d75ac96aa1b0a8a378826626a0fbd8ce4380.tar.bz2 linux-d544d75ac96aa1b0a8a378826626a0fbd8ce4380.zip |
PCI: Embed ATS info directly into struct pci_dev
The pci_ats struct is small and will get smaller, so I don't think it's
worth allocating it separately from the pci_dev struct.
Embed the ATS fields directly into struct pci_dev.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/pci/ats.c')
-rw-r--r-- | drivers/pci/ats.c | 61 |
1 files changed, 21 insertions, 40 deletions
diff --git a/drivers/pci/ats.c b/drivers/pci/ats.c index 2026f5388796..690ae6e6786c 100644 --- a/drivers/pci/ats.c +++ b/drivers/pci/ats.c @@ -21,29 +21,15 @@ static void ats_alloc_one(struct pci_dev *dev) { int pos; u16 cap; - struct pci_ats *ats; pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ATS); if (!pos) return; - ats = kzalloc(sizeof(*ats), GFP_KERNEL); - if (!ats) { - dev_warn(&dev->dev, "can't allocate space for ATS state\n"); - return; - } - - ats->pos = pos; - pci_read_config_word(dev, pos + PCI_ATS_CAP, &cap); - ats->qdep = PCI_ATS_CAP_QDEP(cap) ? PCI_ATS_CAP_QDEP(cap) : + dev->ats_cap = pos; + pci_read_config_word(dev, dev->ats_cap + PCI_ATS_CAP, &cap); + dev->ats_qdep = PCI_ATS_CAP_QDEP(cap) ? PCI_ATS_CAP_QDEP(cap) : PCI_ATS_MAX_QDEP; - dev->ats = ats; -} - -static void ats_free_one(struct pci_dev *dev) -{ - kfree(dev->ats); - dev->ats = NULL; } void pci_ats_init(struct pci_dev *dev) @@ -51,11 +37,6 @@ void pci_ats_init(struct pci_dev *dev) ats_alloc_one(dev); } -void pci_ats_free(struct pci_dev *dev) -{ - ats_free_one(dev); -} - /** * pci_enable_ats - enable the ATS capability * @dev: the PCI device @@ -67,9 +48,9 @@ int pci_enable_ats(struct pci_dev *dev, int ps) { u16 ctrl; - BUG_ON(dev->ats && dev->ats->is_enabled); + BUG_ON(dev->ats_cap && dev->ats_enabled); - if (!dev->ats) + if (!dev->ats_cap) return -EINVAL; if (ps < PCI_ATS_MIN_STU) @@ -83,17 +64,17 @@ int pci_enable_ats(struct pci_dev *dev, int ps) if (dev->is_virtfn) { struct pci_dev *pdev = dev->physfn; - if (pdev->ats->stu != ps) + if (pdev->ats_stu != ps) return -EINVAL; - atomic_inc(&pdev->ats->ref_cnt); /* count enabled VFs */ + atomic_inc(&pdev->ats_ref_cnt); /* count enabled VFs */ } else { - dev->ats->stu = ps; - ctrl |= PCI_ATS_CTRL_STU(dev->ats->stu - PCI_ATS_MIN_STU); + dev->ats_stu = ps; + ctrl |= PCI_ATS_CTRL_STU(dev->ats_stu - PCI_ATS_MIN_STU); } - pci_write_config_word(dev, dev->ats->pos + PCI_ATS_CTRL, ctrl); + pci_write_config_word(dev, dev->ats_cap + PCI_ATS_CTRL, ctrl); - dev->ats->is_enabled = 1; + dev->ats_enabled = 1; return 0; } EXPORT_SYMBOL_GPL(pci_enable_ats); @@ -106,22 +87,22 @@ void pci_disable_ats(struct pci_dev *dev) { u16 ctrl; - BUG_ON(!dev->ats || !dev->ats->is_enabled); + BUG_ON(!dev->ats_cap || !dev->ats_enabled); - if (atomic_read(&dev->ats->ref_cnt)) + if (atomic_read(&dev->ats_ref_cnt)) return; /* VFs still enabled */ if (dev->is_virtfn) { struct pci_dev *pdev = dev->physfn; - atomic_dec(&pdev->ats->ref_cnt); + atomic_dec(&pdev->ats_ref_cnt); } - pci_read_config_word(dev, dev->ats->pos + PCI_ATS_CTRL, &ctrl); + pci_read_config_word(dev, dev->ats_cap + PCI_ATS_CTRL, &ctrl); ctrl &= ~PCI_ATS_CTRL_ENABLE; - pci_write_config_word(dev, dev->ats->pos + PCI_ATS_CTRL, ctrl); + pci_write_config_word(dev, dev->ats_cap + PCI_ATS_CTRL, ctrl); - dev->ats->is_enabled = 0; + dev->ats_enabled = 0; } EXPORT_SYMBOL_GPL(pci_disable_ats); @@ -136,8 +117,8 @@ void pci_restore_ats_state(struct pci_dev *dev) ctrl = PCI_ATS_CTRL_ENABLE; if (!dev->is_virtfn) - ctrl |= PCI_ATS_CTRL_STU(dev->ats->stu - PCI_ATS_MIN_STU); - pci_write_config_word(dev, dev->ats->pos + PCI_ATS_CTRL, ctrl); + ctrl |= PCI_ATS_CTRL_STU(dev->ats_stu - PCI_ATS_MIN_STU); + pci_write_config_word(dev, dev->ats_cap + PCI_ATS_CTRL, ctrl); } EXPORT_SYMBOL_GPL(pci_restore_ats_state); @@ -158,8 +139,8 @@ int pci_ats_queue_depth(struct pci_dev *dev) if (dev->is_virtfn) return 0; - if (dev->ats) - return dev->ats->qdep; + if (dev->ats_cap) + return dev->ats_qdep; return -ENODEV; } |