0f50c4cd2b
Signed-off-by: Julien Olivain <ju.o@free.fr> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
84 lines
3.2 KiB
Python
84 lines
3.2 KiB
Python
import os
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import infra.basetest
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class TestPCIUtils(infra.basetest.BRTest):
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config = infra.basetest.BASIC_TOOLCHAIN_CONFIG + \
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"""
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BR2_PACKAGE_PCIUTILS=y
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BR2_TARGET_ROOTFS_CPIO=y
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# BR2_TARGET_ROOTFS_TAR is not set
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"""
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def test_run(self):
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cpio_file = os.path.join(self.builddir, "images", "rootfs.cpio")
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# Note: we add a qemu pci-testdev in order to have a stable
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# device ID, and for writing in configuration space without
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# interfering with the rest of the emulation. See:
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# https://www.qemu.org/docs/master/specs/pci-testdev.html
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self.emulator.boot(arch="armv5",
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kernel="builtin",
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options=["-initrd", cpio_file,
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"-device", "pci-testdev"])
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self.emulator.login()
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# Check the program executes. This test also check that we
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# have "lspci" from the pciutils package, rather than the
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# busybox applet (which does not recognize the --version
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# option)"
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self.assertRunOk("lspci --version")
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# Check few program invocations.
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self.assertRunOk("lspci")
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for lspci_opt in ["-t", "-n", "-v", "-vv", "-x"]:
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self.assertRunOk(f"lspci {lspci_opt}")
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# Check we can see the qemu pci-testdev.
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# Vendor: 1b36: Red Hat, Inc.
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# Device: 0005: QEMU PCI Test Device
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pci_vendor_id = "1b36"
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pci_device_id = "0005"
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pci_dev = f"{pci_vendor_id}:{pci_device_id}"
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cmd = f"lspci -d {pci_dev}"
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output, exit_code = self.emulator.run(cmd)
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self.assertEqual(exit_code, 0)
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self.assertIn("Red Hat, Inc.", output[0])
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self.assertIn("QEMU PCI Test Device", output[0])
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# We disable INTx emulation by setting bit 10 of the COMMAND
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# register in the configuration space. See:
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# https://git.kernel.org/pub/scm/utils/pciutils/pciutils.git/tree/lib/header.h?h=v3.10.0#n26
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dis_int_x = 0x400
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data_mask = f"{hex(dis_int_x)}:{hex(dis_int_x)}"
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cmd = f"setpci -d {pci_dev} COMMAND.w={data_mask}"
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self.assertRunOk(cmd)
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# We read back and check the value.
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cmd = f"setpci -d {pci_dev} COMMAND.w"
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output, exit_code = self.emulator.run(cmd)
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read_value = int(output[0], 16)
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self.assertEqual(exit_code, 0)
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self.assertTrue((read_value & dis_int_x) == dis_int_x)
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# We check lspci now see the disabled INTx emulation.
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cmd = f"lspci -vv -d {pci_dev} | grep -F 'DisINTx+'"
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self.assertRunOk(cmd)
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# We re-enable the INTx emulation by clearing the bit 10.
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data_mask = f"0x0:{hex(dis_int_x)}"
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cmd = f"setpci -d {pci_dev} COMMAND.w={data_mask}"
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self.assertRunOk(cmd)
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# We read back and check the value, again.
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cmd = f"setpci -d {pci_dev} COMMAND.w"
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output, exit_code = self.emulator.run(cmd)
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read_value = int(output[0], 16)
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self.assertEqual(exit_code, 0)
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self.assertTrue((read_value & dis_int_x) == 0)
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# We check lspci now see the enabled INTx emulation.
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cmd = f"lspci -vv -d {pci_dev} | grep -F 'DisINTx-'"
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self.assertRunOk(cmd)
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