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| author | Vasilii Chernov <vchernov@inr.ru> | 2016-03-03 10:34:49 +0100 |
|---|---|---|
| committer | Vasilii Chernov <vchernov@inr.ru> | 2016-03-03 10:34:49 +0100 |
| commit | ee16e47966afe180d3c32e2b1d93301052894fac (patch) | |
| tree | 56aecf261aaae57e28c08cef573ae6642ec5394d /driver/pcibus.c | |
| parent | 02d0026e2df2ba5c68c0c1a67aec4437c9e8e8f3 (diff) | |
| parent | 195c28f3074486165b6e0935362810f8a1fb9531 (diff) | |
| download | pcitool-ee16e47966afe180d3c32e2b1d93301052894fac.tar.gz pcitool-ee16e47966afe180d3c32e2b1d93301052894fac.tar.bz2 pcitool-ee16e47966afe180d3c32e2b1d93301052894fac.tar.xz pcitool-ee16e47966afe180d3c32e2b1d93301052894fac.zip | |
Merge with http://ufo.kit.edu/ufo/log/csa/pcitool 369 revision
Diffstat (limited to 'driver/pcibus.c')
| -rw-r--r-- | driver/pcibus.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/driver/pcibus.c b/driver/pcibus.c new file mode 100644 index 0000000..f28f527 --- /dev/null +++ b/driver/pcibus.c @@ -0,0 +1,25 @@ +#include <linux/pci.h> + +int pcidriver_pcie_get_mps(struct pci_dev *dev) +{ + u16 ctl; + + pcie_capability_read_word(dev, PCI_EXP_DEVCTL, &ctl); + + return 128 << ((ctl & PCI_EXP_DEVCTL_PAYLOAD) >> 5); +} + +int pcidriver_pcie_set_mps(struct pci_dev *dev, int mps) +{ + u16 v; + + if (mps < 128 || mps > 4096 || !is_power_of_2(mps)) + return -EINVAL; + + v = ffs(mps) - 8; + if (v > dev->pcie_mpss) + return -EINVAL; + v <<= 5; + + return pcie_capability_clear_and_set_word(dev, PCI_EXP_DEVCTL, PCI_EXP_DEVCTL_PAYLOAD, v); +} |