93 lines
3.3 KiB
Diff
93 lines
3.3 KiB
Diff
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diff --git a/src/pci-sysfs.h b/src/pci-sysfs.h
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new file mode 100644
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index 0000000..1fc695b
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--- /dev/null
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+++ b/src/pci-sysfs.h
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@@ -0,0 +1,85 @@
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+/*
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+ * Copyright (c) 2016-2018, NVIDIA CORPORATION.
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+ *
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+ * Permission is hereby granted, free of charge, to any person
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+ * obtaining a copy of this software and associated documentation
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+ * files (the "Software"), to deal in the Software without
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+ * restriction, including without limitation the rights to use, copy,
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+ * modify, merge, publish, distribute, sublicense, and/or sell copies
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+ * of the Software, and to permit persons to whom the Software is
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+ * furnished to do so, subject to the following conditions:
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+ *
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+ * The above copyright notice and this permission notice shall be
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+ * included in all copies or substantial portions of the Software.
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+ *
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+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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+ * SOFTWARE.
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+ *
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+ * This file provides utility functions on Linux for interfacing
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+ * with the sysfs/PCI kernel facility.
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+ */
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+
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+#ifndef __PCI_SYSFS_H__
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+#define __PCI_SYSFS_H__
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+
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+#if defined(NV_LINUX)
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+
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+#include <linux/pci.h>
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+
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+#if !defined(PCI_STD_HEADER_SIZEOF)
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+#define PCI_STD_HEADER_SIZEOF 64
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+#endif
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+#if !defined(PCI_CAP_ID_EXP)
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+#define PCI_CAP_ID_EXP 0x10 /* PCI Express */
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+#endif
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+#if !defined(PCI_EXP_LNKCAP)
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+#define PCI_EXP_LNKCAP 12 /* Link Capabilities */
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+#endif
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+#if !defined(PCI_EXP_LNKCAP_DLLLARC)
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+#define PCI_EXP_LNKCAP_DLLLARC 0x00100000 /* Data Link Layer Link Active Reporting Capable */
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+#endif
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+#if !defined(PCI_EXP_LNKCTL)
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+#define PCI_EXP_LNKCTL 16 /* Link Control */
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+#endif
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+#if !defined(PCI_EXP_LNKCTL_LD)
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+#define PCI_EXP_LNKCTL_LD 0x0010 /* Link Disable */
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+#endif
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+#if !defined(PCI_EXP_LNKSTA)
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+#define PCI_EXP_LNKSTA 18 /* Link Status */
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+#endif
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+#if !defined(PCI_EXP_LNKSTA_DLLLA)
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+#define PCI_EXP_LNKSTA_DLLLA 0x2000 /* Data Link Layer Link Active */
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+#endif
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+
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+#define PCI_LINK_WAIT_US 200000 /* 200 ms, must be less than 1000000 (1s) */
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+#define PCI_LINK_DELAY_NS 100000000 /* 100 ms */
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+#define PCI_LINK_DLLLAR_DISABLE_DELAY_NS 30000000 /* 30ms */
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+
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+#if (_POSIX_C_SOURCE >= 199309L)
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+#define PCI_NANOSLEEP(ts, rem) nanosleep(ts, rem)
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+#elif !(_POSIX_C_SOURCE >= 200809L)
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+#define PCI_NANOSLEEP(ts, rem) usleep((ts)->tv_sec * 1000000 + ((ts)->tv_nsec + 999) / 1000)
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+#else
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+#define PCI_NANOSLEEP(ts, rem) sleep((ts)->tv_sec + ((ts)->tv_nsec + 999999999) / 1000000000)
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+#endif
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+
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+typedef struct {
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+ unsigned domain;
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+ unsigned bus;
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+ unsigned dev;
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+ unsigned ftn;
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+} pci_info_t;
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+
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+int pci_rescan(uint16_t domain, uint8_t bus, uint8_t slot, uint8_t function);
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+int pci_find_parent_bridge(pci_info_t *p_gpu_info, pci_info_t *p_bridge_info);
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+int pci_bridge_link_set_enable(uint16_t domain, uint8_t bus, uint8_t device, uint8_t ftn, int enable);
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+
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+#endif /* NV_LINUX */
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+
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+#endif /* __PCI_SYSFS_H__ */
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\ No newline at end of file
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