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![Linus Torvalds](/assets/img/avatar_default.png)
-----BEGIN PGP SIGNATURE----- iQJIBAABCgAyFiEEgMe7l+5h9hnxdsnuWYigwDrT+vwFAl+QUFkUHGJoZWxnYWFz QGdvb2dsZS5jb20ACgkQWYigwDrT+vw6SQ/9FHiAlHIa48/l5ZweqAuN3XnU8hoO sqMoJE8eqTkIYIT0aQdW6b1sDB0YE6b4UVxzg+UL/E0qYeJqgIUakig7QkyyF1qU aT5hq2ic+lk88G7AAxK3kgQGPk+JvP1EFIyOu6HBWzzDDzgLme1Iuh/5ulc2/lo+ E4biy0WOnI8vMfCieXGK4bSpc17Rn0+3N4cuVwZXBlntsvicE90VqeWBzqti1sk5 R6gkZuW+EIUNHHL7TLlkCeYZq6QNbXWzhfKCiaGW2wW4eJ4Ek1/ncQjyTbCFytKU 7OIYvrH20XO3L5GEfJ5fdbWErI1dRpoHO4NmhWljyBcVh44VYnM2ixhA7TuJ+TOk OtMbtoJAlP+QDlVdAW6rmRYmMPLFK/AQl5Aq7ftY22b2rYXqP20BobPy2MpDT71T sGC8z0ABl/ijo23g3I+3/2VzP/RzGhZJ0ZqagrXj8jHtg8SVy2fLcR5nr/dlrgFk TG83zML6ui1KViyx5nzElaEtw18aTqP61CNQxijQtNoYwKBTtRKNTrdRr4Qo7Hi6 6S+No3+4z8Kf8d90y0LkJQqr7JRkG6nI3AhXHO3rxXpXJOD2+QzlpwBZTQnASqq7 3kC1doUPmN97rFUYPQWWyOs6xSMcGbGIz8Uus3shH6yDtNxgpnIVoctH55hTEh6w nSY/4ssIfzJxZCE= =RCFo -----END PGP SIGNATURE----- Merge tag 'pci-v5.10-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci Pull PCI updates from Bjorn Helgaas: "Enumeration: - Print IRQ number used by PCIe Link Bandwidth Notification (Dongdong Liu) - Add schedule point in pci_read_config() to reduce max latency (Jiang Biao) - Add Kconfig options for MPS/MRRS strategy (Jim Quinlan) Resource management: - Fix pci_iounmap() memory leak when !CONFIG_GENERIC_IOMAP (Lorenzo Pieralisi) PCIe native device hotplug: - Reduce noisiness on hot removal (Lukas Wunner) Power management: - Revert "PCI/PM: Apply D2 delay as milliseconds, not microseconds" that was done on the basis of spec typo (Bjorn Helgaas) - Rename pci_dev.d3_delay to d3hot_delay to remove D3hot/D3cold ambiguity (Krzysztof Wilczyński) - Remove unused pcibios_pm_ops (Vaibhav Gupta) IOMMU: - Enable Translation Blocking for external devices to harden against DMA attacks (Rajat Jain) Error handling: - Add an ACPI APEI notifier chain for vendor CPER records to enable device-specific error handling (Shiju Jose) ASPM: - Remove struct aspm_register_info to simplify code (Saheed O. Bolarinwa) Amlogic Meson PCIe controller driver: - Build as module by default (Kevin Hilman) Ampere Altra PCIe controller driver: - Add MCFG quirk to work around non-standard ECAM implementation (Tuan Phan) Broadcom iProc PCIe controller driver: - Set affinity mask on MSI interrupts (Mark Tomlinson) Broadcom STB PCIe controller driver: - Make PCIE_BRCMSTB depend on ARCH_BRCMSTB (Jim Quinlan) - Add DT bindings for more Brcmstb chips (Jim Quinlan) - Add bcm7278 register info (Jim Quinlan) - Add bcm7278 PERST# support (Jim Quinlan) - Add suspend and resume pm_ops (Jim Quinlan) - Add control of rescal reset (Jim Quinlan) - Set additional internal memory DMA viewport sizes (Jim Quinlan) - Accommodate MSI for older chips (Jim Quinlan) - Set bus max burst size by chip type (Jim Quinlan) - Add support for bcm7211, bcm7216, bcm7445, bcm7278 (Jim Quinlan) Freescale i.MX6 PCIe controller driver: - Use dev_err_probe() to reduce redundant messages (Anson Huang) Freescale Layerscape PCIe controller driver: - Enforce 4K DMA buffer alignment in endpoint test (Hou Zhiqiang) - Add DT compatible strings for ls1088a, ls2088a (Xiaowei Bao) - Add endpoint support for ls1088a, ls2088a (Xiaowei Bao) - Add endpoint test support for lS1088a (Xiaowei Bao) - Add MSI-X support for ls1088a (Xiaowei Bao) HiSilicon HIP PCIe controller driver: - Handle HIP-specific errors via ACPI APEI (Yicong Yang) HiSilicon Kirin PCIe controller driver: - Return -EPROBE_DEFER if the GPIO isn't ready (Bean Huo) Intel VMD host bridge driver: - Factor out physical offset, bus offset, IRQ domain, IRQ allocation (Jon Derrick) - Use generic PCI PM correctly (Jon Derrick) Marvell Aardvark PCIe controller driver: - Fix compilation on s390 (Pali Rohár) - Implement driver 'remove' function and allow to build it as module (Pali Rohár) - Move PCIe reset card code to advk_pcie_train_link() (Pali Rohár) - Convert mvebu a3700 internal SMCC firmware return codes to errno (Pali Rohár) - Fix initialization with old Marvell's Arm Trusted Firmware (Pali Rohár) Microsoft Hyper-V host bridge driver: - Fix hibernation in case interrupts are not re-created (Dexuan Cui) NVIDIA Tegra PCIe controller driver: - Stop checking return value of debugfs_create() functions (Greg Kroah-Hartman) - Convert to use DEFINE_SEQ_ATTRIBUTE macro (Liu Shixin) Qualcomm PCIe controller driver: - Reset PCIe to work around Qsdk U-Boot issue (Ansuel Smith) Renesas R-Car PCIe controller driver: - Add DT documentation for r8a774a1, r8a774b1, r8a774e1 endpoints (Lad Prabhakar) - Add RZ/G2M, RZ/G2N, RZ/G2H IDs to endpoint test (Lad Prabhakar) - Add DT support for r8a7742 (Lad Prabhakar) Socionext UniPhier Pro5 controller driver: - Add DT descriptions of iATU register (host and endpoint) (Kunihiko Hayashi) Synopsys DesignWare PCIe controller driver: - Add link up check in dw_child_pcie_ops.map_bus() (racy, but seems unavoidable) (Hou Zhiqiang) - Fix endpoint Header Type check so multi-function devices work (Hou Zhiqiang) - Skip PCIE_MSI_INTR0* programming if MSI is disabled (Jisheng Zhang) - Stop leaking MSI page in suspend/resume (Jisheng Zhang) - Add common iATU register support instead of keystone-specific code (Kunihiko Hayashi) - Major config space access and other cleanups in dwc core and drivers that use it (al, exynos, histb, imx6, intel-gw, keystone, kirin, meson, qcom, tegra) (Rob Herring) - Add multiple PFs support for endpoint (Xiaowei Bao) - Add MSI-X doorbell mode in endpoint mode (Xiaowei Bao) Miscellaneous: - Use fallthrough pseudo-keyword (Gustavo A. R. Silva) - Fix "0 used as NULL pointer" warnings (Gustavo Pimentel) - Fix "cast truncates bits from constant value" warnings (Gustavo Pimentel) - Remove redundant zeroing for sg_init_table() (Julia Lawall) - Use scnprintf(), not snprintf(), in sysfs "show" functions (Krzysztof Wilczyński) - Remove unused assignments (Krzysztof Wilczyński) - Fix "0 used as NULL pointer" warning (Krzysztof Wilczyński) - Simplify bool comparisons (Krzysztof Wilczyński) - Use for_each_child_of_node() and for_each_node_by_name() (Qinglang Miao) - Simplify return expressions (Qinglang Miao)" * tag 'pci-v5.10-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (147 commits) PCI: vmd: Update VMD PM to correctly use generic PCI PM PCI: vmd: Create IRQ allocation helper PCI: vmd: Create IRQ Domain configuration helper PCI: vmd: Create bus offset configuration helper PCI: vmd: Create physical offset helper PCI: v3-semi: Remove unneeded break PCI: dwc: Add link up check in dw_child_pcie_ops.map_bus() PCI/ASPM: Remove struct pcie_link_state.l1ss PCI/ASPM: Remove struct aspm_register_info.l1ss_cap PCI/ASPM: Pass L1SS Capabilities value, not struct aspm_register_info PCI/ASPM: Remove struct aspm_register_info.l1ss_ctl1 PCI/ASPM: Remove struct aspm_register_info.l1ss_ctl2 (unused) PCI/ASPM: Remove struct aspm_register_info.l1ss_cap_ptr PCI/ASPM: Remove struct aspm_register_info.latency_encoding PCI/ASPM: Remove struct aspm_register_info.enabled PCI/ASPM: Remove struct aspm_register_info.support PCI/ASPM: Use 'parent' and 'child' for readability PCI/ASPM: Move LTR path check to where it's used PCI/ASPM: Move pci_clear_and_set_dword() earlier PCI: dwc: Fix MSI page leakage in suspend/resume ...
705 lines
17 KiB
C
705 lines
17 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Standard Hot Plug Controller Driver
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*
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* Copyright (C) 1995,2001 Compaq Computer Corporation
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* Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
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* Copyright (C) 2001 IBM Corp.
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* Copyright (C) 2003-2004 Intel Corporation
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*
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* All rights reserved.
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*
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* Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com>
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*
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/slab.h>
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#include <linux/pci.h>
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#include "../pci.h"
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#include "shpchp.h"
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static void interrupt_event_handler(struct work_struct *work);
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static int shpchp_enable_slot(struct slot *p_slot);
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static int shpchp_disable_slot(struct slot *p_slot);
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static int queue_interrupt_event(struct slot *p_slot, u32 event_type)
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{
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struct event_info *info;
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info = kmalloc(sizeof(*info), GFP_ATOMIC);
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if (!info)
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return -ENOMEM;
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info->event_type = event_type;
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info->p_slot = p_slot;
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INIT_WORK(&info->work, interrupt_event_handler);
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queue_work(p_slot->wq, &info->work);
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return 0;
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}
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u8 shpchp_handle_attention_button(u8 hp_slot, struct controller *ctrl)
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{
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struct slot *p_slot;
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u32 event_type;
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/* Attention Button Change */
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ctrl_dbg(ctrl, "Attention button interrupt received\n");
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p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
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p_slot->hpc_ops->get_adapter_status(p_slot, &(p_slot->presence_save));
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/*
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* Button pressed - See if need to TAKE ACTION!!!
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*/
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ctrl_info(ctrl, "Button pressed on Slot(%s)\n", slot_name(p_slot));
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event_type = INT_BUTTON_PRESS;
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queue_interrupt_event(p_slot, event_type);
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return 0;
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}
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u8 shpchp_handle_switch_change(u8 hp_slot, struct controller *ctrl)
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{
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struct slot *p_slot;
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u8 getstatus;
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u32 event_type;
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/* Switch Change */
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ctrl_dbg(ctrl, "Switch interrupt received\n");
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p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
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p_slot->hpc_ops->get_adapter_status(p_slot, &(p_slot->presence_save));
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p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
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ctrl_dbg(ctrl, "Card present %x Power status %x\n",
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p_slot->presence_save, p_slot->pwr_save);
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if (getstatus) {
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/*
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* Switch opened
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*/
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ctrl_info(ctrl, "Latch open on Slot(%s)\n", slot_name(p_slot));
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event_type = INT_SWITCH_OPEN;
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if (p_slot->pwr_save && p_slot->presence_save) {
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event_type = INT_POWER_FAULT;
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ctrl_err(ctrl, "Surprise Removal of card\n");
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}
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} else {
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/*
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* Switch closed
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*/
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ctrl_info(ctrl, "Latch close on Slot(%s)\n", slot_name(p_slot));
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event_type = INT_SWITCH_CLOSE;
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}
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queue_interrupt_event(p_slot, event_type);
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return 1;
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}
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u8 shpchp_handle_presence_change(u8 hp_slot, struct controller *ctrl)
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{
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struct slot *p_slot;
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u32 event_type;
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/* Presence Change */
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ctrl_dbg(ctrl, "Presence/Notify input change\n");
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p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
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/*
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* Save the presence state
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*/
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p_slot->hpc_ops->get_adapter_status(p_slot, &(p_slot->presence_save));
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if (p_slot->presence_save) {
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/*
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* Card Present
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*/
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ctrl_info(ctrl, "Card present on Slot(%s)\n",
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slot_name(p_slot));
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event_type = INT_PRESENCE_ON;
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} else {
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/*
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* Not Present
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*/
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ctrl_info(ctrl, "Card not present on Slot(%s)\n",
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slot_name(p_slot));
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event_type = INT_PRESENCE_OFF;
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}
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queue_interrupt_event(p_slot, event_type);
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return 1;
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}
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u8 shpchp_handle_power_fault(u8 hp_slot, struct controller *ctrl)
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{
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struct slot *p_slot;
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u32 event_type;
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/* Power fault */
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ctrl_dbg(ctrl, "Power fault interrupt received\n");
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p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
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if (!(p_slot->hpc_ops->query_power_fault(p_slot))) {
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/*
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* Power fault Cleared
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*/
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ctrl_info(ctrl, "Power fault cleared on Slot(%s)\n",
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slot_name(p_slot));
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p_slot->status = 0x00;
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event_type = INT_POWER_FAULT_CLEAR;
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} else {
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/*
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* Power fault
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*/
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ctrl_info(ctrl, "Power fault on Slot(%s)\n", slot_name(p_slot));
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event_type = INT_POWER_FAULT;
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/* set power fault status for this board */
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p_slot->status = 0xFF;
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ctrl_info(ctrl, "Power fault bit %x set\n", hp_slot);
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}
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queue_interrupt_event(p_slot, event_type);
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return 1;
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}
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/* The following routines constitute the bulk of the
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hotplug controller logic
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*/
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static int change_bus_speed(struct controller *ctrl, struct slot *p_slot,
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enum pci_bus_speed speed)
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{
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int rc = 0;
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ctrl_dbg(ctrl, "Change speed to %d\n", speed);
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rc = p_slot->hpc_ops->set_bus_speed_mode(p_slot, speed);
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if (rc) {
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ctrl_err(ctrl, "%s: Issue of set bus speed mode command failed\n",
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__func__);
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return WRONG_BUS_FREQUENCY;
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}
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return rc;
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}
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static int fix_bus_speed(struct controller *ctrl, struct slot *pslot,
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u8 flag, enum pci_bus_speed asp, enum pci_bus_speed bsp,
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enum pci_bus_speed msp)
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{
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int rc = 0;
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/*
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* If other slots on the same bus are occupied, we cannot
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* change the bus speed.
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*/
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if (flag) {
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if (asp < bsp) {
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ctrl_err(ctrl, "Speed of bus %x and adapter %x mismatch\n",
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bsp, asp);
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rc = WRONG_BUS_FREQUENCY;
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}
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return rc;
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}
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if (asp < msp) {
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if (bsp != asp)
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rc = change_bus_speed(ctrl, pslot, asp);
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} else {
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if (bsp != msp)
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rc = change_bus_speed(ctrl, pslot, msp);
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}
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return rc;
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}
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/**
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* board_added - Called after a board has been added to the system.
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* @p_slot: target &slot
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*
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* Turns power on for the board.
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* Configures board.
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*/
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static int board_added(struct slot *p_slot)
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{
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u8 hp_slot;
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u8 slots_not_empty = 0;
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int rc = 0;
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enum pci_bus_speed asp, bsp, msp;
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struct controller *ctrl = p_slot->ctrl;
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struct pci_bus *parent = ctrl->pci_dev->subordinate;
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hp_slot = p_slot->device - ctrl->slot_device_offset;
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ctrl_dbg(ctrl, "%s: p_slot->device, slot_offset, hp_slot = %d, %d ,%d\n",
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__func__, p_slot->device, ctrl->slot_device_offset, hp_slot);
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/* Power on slot without connecting to bus */
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rc = p_slot->hpc_ops->power_on_slot(p_slot);
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if (rc) {
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ctrl_err(ctrl, "Failed to power on slot\n");
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return -1;
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}
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if ((ctrl->pci_dev->vendor == 0x8086) && (ctrl->pci_dev->device == 0x0332)) {
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rc = p_slot->hpc_ops->set_bus_speed_mode(p_slot, PCI_SPEED_33MHz);
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if (rc) {
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ctrl_err(ctrl, "%s: Issue of set bus speed mode command failed\n",
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__func__);
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return WRONG_BUS_FREQUENCY;
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}
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/* turn on board, blink green LED, turn off Amber LED */
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rc = p_slot->hpc_ops->slot_enable(p_slot);
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if (rc) {
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ctrl_err(ctrl, "Issue of Slot Enable command failed\n");
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return rc;
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}
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}
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rc = p_slot->hpc_ops->get_adapter_speed(p_slot, &asp);
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if (rc) {
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ctrl_err(ctrl, "Can't get adapter speed or bus mode mismatch\n");
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return WRONG_BUS_FREQUENCY;
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}
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bsp = ctrl->pci_dev->subordinate->cur_bus_speed;
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msp = ctrl->pci_dev->subordinate->max_bus_speed;
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/* Check if there are other slots or devices on the same bus */
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if (!list_empty(&ctrl->pci_dev->subordinate->devices))
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slots_not_empty = 1;
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ctrl_dbg(ctrl, "%s: slots_not_empty %d, adapter_speed %d, bus_speed %d, max_bus_speed %d\n",
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__func__, slots_not_empty, asp,
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bsp, msp);
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rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, asp, bsp, msp);
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if (rc)
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return rc;
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/* turn on board, blink green LED, turn off Amber LED */
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rc = p_slot->hpc_ops->slot_enable(p_slot);
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if (rc) {
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ctrl_err(ctrl, "Issue of Slot Enable command failed\n");
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return rc;
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}
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/* Wait for ~1 second */
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msleep(1000);
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ctrl_dbg(ctrl, "%s: slot status = %x\n", __func__, p_slot->status);
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/* Check for a power fault */
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if (p_slot->status == 0xFF) {
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/* power fault occurred, but it was benign */
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ctrl_dbg(ctrl, "%s: Power fault\n", __func__);
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p_slot->status = 0;
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goto err_exit;
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}
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if (shpchp_configure_device(p_slot)) {
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ctrl_err(ctrl, "Cannot add device at %04x:%02x:%02x\n",
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pci_domain_nr(parent), p_slot->bus, p_slot->device);
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goto err_exit;
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}
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p_slot->status = 0;
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p_slot->is_a_board = 0x01;
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p_slot->pwr_save = 1;
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p_slot->hpc_ops->green_led_on(p_slot);
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return 0;
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err_exit:
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/* turn off slot, turn on Amber LED, turn off Green LED */
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rc = p_slot->hpc_ops->slot_disable(p_slot);
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if (rc) {
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ctrl_err(ctrl, "%s: Issue of Slot Disable command failed\n",
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__func__);
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return rc;
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}
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return(rc);
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}
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/**
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* remove_board - Turns off slot and LEDs
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* @p_slot: target &slot
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*/
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static int remove_board(struct slot *p_slot)
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{
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struct controller *ctrl = p_slot->ctrl;
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u8 hp_slot;
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int rc;
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shpchp_unconfigure_device(p_slot);
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hp_slot = p_slot->device - ctrl->slot_device_offset;
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p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
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ctrl_dbg(ctrl, "%s: hp_slot = %d\n", __func__, hp_slot);
|
|
|
|
/* Change status to shutdown */
|
|
if (p_slot->is_a_board)
|
|
p_slot->status = 0x01;
|
|
|
|
/* turn off slot, turn on Amber LED, turn off Green LED */
|
|
rc = p_slot->hpc_ops->slot_disable(p_slot);
|
|
if (rc) {
|
|
ctrl_err(ctrl, "%s: Issue of Slot Disable command failed\n",
|
|
__func__);
|
|
return rc;
|
|
}
|
|
|
|
rc = p_slot->hpc_ops->set_attention_status(p_slot, 0);
|
|
if (rc) {
|
|
ctrl_err(ctrl, "Issue of Set Attention command failed\n");
|
|
return rc;
|
|
}
|
|
|
|
p_slot->pwr_save = 0;
|
|
p_slot->is_a_board = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
struct pushbutton_work_info {
|
|
struct slot *p_slot;
|
|
struct work_struct work;
|
|
};
|
|
|
|
/**
|
|
* shpchp_pushbutton_thread - handle pushbutton events
|
|
* @work: &struct work_struct to be handled
|
|
*
|
|
* Scheduled procedure to handle blocking stuff for the pushbuttons.
|
|
* Handles all pending events and exits.
|
|
*/
|
|
static void shpchp_pushbutton_thread(struct work_struct *work)
|
|
{
|
|
struct pushbutton_work_info *info =
|
|
container_of(work, struct pushbutton_work_info, work);
|
|
struct slot *p_slot = info->p_slot;
|
|
|
|
mutex_lock(&p_slot->lock);
|
|
switch (p_slot->state) {
|
|
case POWEROFF_STATE:
|
|
mutex_unlock(&p_slot->lock);
|
|
shpchp_disable_slot(p_slot);
|
|
mutex_lock(&p_slot->lock);
|
|
p_slot->state = STATIC_STATE;
|
|
break;
|
|
case POWERON_STATE:
|
|
mutex_unlock(&p_slot->lock);
|
|
if (shpchp_enable_slot(p_slot))
|
|
p_slot->hpc_ops->green_led_off(p_slot);
|
|
mutex_lock(&p_slot->lock);
|
|
p_slot->state = STATIC_STATE;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
mutex_unlock(&p_slot->lock);
|
|
|
|
kfree(info);
|
|
}
|
|
|
|
void shpchp_queue_pushbutton_work(struct work_struct *work)
|
|
{
|
|
struct slot *p_slot = container_of(work, struct slot, work.work);
|
|
struct pushbutton_work_info *info;
|
|
|
|
info = kmalloc(sizeof(*info), GFP_KERNEL);
|
|
if (!info) {
|
|
ctrl_err(p_slot->ctrl, "%s: Cannot allocate memory\n",
|
|
__func__);
|
|
return;
|
|
}
|
|
info->p_slot = p_slot;
|
|
INIT_WORK(&info->work, shpchp_pushbutton_thread);
|
|
|
|
mutex_lock(&p_slot->lock);
|
|
switch (p_slot->state) {
|
|
case BLINKINGOFF_STATE:
|
|
p_slot->state = POWEROFF_STATE;
|
|
break;
|
|
case BLINKINGON_STATE:
|
|
p_slot->state = POWERON_STATE;
|
|
break;
|
|
default:
|
|
kfree(info);
|
|
goto out;
|
|
}
|
|
queue_work(p_slot->wq, &info->work);
|
|
out:
|
|
mutex_unlock(&p_slot->lock);
|
|
}
|
|
|
|
static void update_slot_info(struct slot *slot)
|
|
{
|
|
slot->hpc_ops->get_power_status(slot, &slot->pwr_save);
|
|
slot->hpc_ops->get_attention_status(slot, &slot->attention_save);
|
|
slot->hpc_ops->get_latch_status(slot, &slot->latch_save);
|
|
slot->hpc_ops->get_adapter_status(slot, &slot->presence_save);
|
|
}
|
|
|
|
/*
|
|
* Note: This function must be called with slot->lock held
|
|
*/
|
|
static void handle_button_press_event(struct slot *p_slot)
|
|
{
|
|
u8 getstatus;
|
|
struct controller *ctrl = p_slot->ctrl;
|
|
|
|
switch (p_slot->state) {
|
|
case STATIC_STATE:
|
|
p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
|
|
if (getstatus) {
|
|
p_slot->state = BLINKINGOFF_STATE;
|
|
ctrl_info(ctrl, "PCI slot #%s - powering off due to button press\n",
|
|
slot_name(p_slot));
|
|
} else {
|
|
p_slot->state = BLINKINGON_STATE;
|
|
ctrl_info(ctrl, "PCI slot #%s - powering on due to button press\n",
|
|
slot_name(p_slot));
|
|
}
|
|
/* blink green LED and turn off amber */
|
|
p_slot->hpc_ops->green_led_blink(p_slot);
|
|
p_slot->hpc_ops->set_attention_status(p_slot, 0);
|
|
|
|
queue_delayed_work(p_slot->wq, &p_slot->work, 5*HZ);
|
|
break;
|
|
case BLINKINGOFF_STATE:
|
|
case BLINKINGON_STATE:
|
|
/*
|
|
* Cancel if we are still blinking; this means that we
|
|
* press the attention again before the 5 sec. limit
|
|
* expires to cancel hot-add or hot-remove
|
|
*/
|
|
ctrl_info(ctrl, "Button cancel on Slot(%s)\n",
|
|
slot_name(p_slot));
|
|
cancel_delayed_work(&p_slot->work);
|
|
if (p_slot->state == BLINKINGOFF_STATE)
|
|
p_slot->hpc_ops->green_led_on(p_slot);
|
|
else
|
|
p_slot->hpc_ops->green_led_off(p_slot);
|
|
p_slot->hpc_ops->set_attention_status(p_slot, 0);
|
|
ctrl_info(ctrl, "PCI slot #%s - action canceled due to button press\n",
|
|
slot_name(p_slot));
|
|
p_slot->state = STATIC_STATE;
|
|
break;
|
|
case POWEROFF_STATE:
|
|
case POWERON_STATE:
|
|
/*
|
|
* Ignore if the slot is on power-on or power-off state;
|
|
* this means that the previous attention button action
|
|
* to hot-add or hot-remove is undergoing
|
|
*/
|
|
ctrl_info(ctrl, "Button ignore on Slot(%s)\n",
|
|
slot_name(p_slot));
|
|
update_slot_info(p_slot);
|
|
break;
|
|
default:
|
|
ctrl_warn(ctrl, "Not a valid state\n");
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void interrupt_event_handler(struct work_struct *work)
|
|
{
|
|
struct event_info *info = container_of(work, struct event_info, work);
|
|
struct slot *p_slot = info->p_slot;
|
|
|
|
mutex_lock(&p_slot->lock);
|
|
switch (info->event_type) {
|
|
case INT_BUTTON_PRESS:
|
|
handle_button_press_event(p_slot);
|
|
break;
|
|
case INT_POWER_FAULT:
|
|
ctrl_dbg(p_slot->ctrl, "%s: Power fault\n", __func__);
|
|
p_slot->hpc_ops->set_attention_status(p_slot, 1);
|
|
p_slot->hpc_ops->green_led_off(p_slot);
|
|
break;
|
|
default:
|
|
update_slot_info(p_slot);
|
|
break;
|
|
}
|
|
mutex_unlock(&p_slot->lock);
|
|
|
|
kfree(info);
|
|
}
|
|
|
|
|
|
static int shpchp_enable_slot (struct slot *p_slot)
|
|
{
|
|
u8 getstatus = 0;
|
|
int rc, retval = -ENODEV;
|
|
struct controller *ctrl = p_slot->ctrl;
|
|
|
|
/* Check to see if (latch closed, card present, power off) */
|
|
mutex_lock(&p_slot->ctrl->crit_sect);
|
|
rc = p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus);
|
|
if (rc || !getstatus) {
|
|
ctrl_info(ctrl, "No adapter on slot(%s)\n", slot_name(p_slot));
|
|
goto out;
|
|
}
|
|
rc = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
|
|
if (rc || getstatus) {
|
|
ctrl_info(ctrl, "Latch open on slot(%s)\n", slot_name(p_slot));
|
|
goto out;
|
|
}
|
|
rc = p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
|
|
if (rc || getstatus) {
|
|
ctrl_info(ctrl, "Already enabled on slot(%s)\n",
|
|
slot_name(p_slot));
|
|
goto out;
|
|
}
|
|
|
|
p_slot->is_a_board = 1;
|
|
|
|
/* We have to save the presence info for these slots */
|
|
p_slot->hpc_ops->get_adapter_status(p_slot, &(p_slot->presence_save));
|
|
p_slot->hpc_ops->get_power_status(p_slot, &(p_slot->pwr_save));
|
|
ctrl_dbg(ctrl, "%s: p_slot->pwr_save %x\n", __func__, p_slot->pwr_save);
|
|
p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
|
|
|
|
if ((p_slot->ctrl->pci_dev->vendor == PCI_VENDOR_ID_AMD &&
|
|
p_slot->ctrl->pci_dev->device == PCI_DEVICE_ID_AMD_POGO_7458)
|
|
&& p_slot->ctrl->num_slots == 1) {
|
|
/* handle AMD POGO errata; this must be done before enable */
|
|
amd_pogo_errata_save_misc_reg(p_slot);
|
|
retval = board_added(p_slot);
|
|
/* handle AMD POGO errata; this must be done after enable */
|
|
amd_pogo_errata_restore_misc_reg(p_slot);
|
|
} else
|
|
retval = board_added(p_slot);
|
|
|
|
if (retval) {
|
|
p_slot->hpc_ops->get_adapter_status(p_slot,
|
|
&(p_slot->presence_save));
|
|
p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
|
|
}
|
|
|
|
update_slot_info(p_slot);
|
|
out:
|
|
mutex_unlock(&p_slot->ctrl->crit_sect);
|
|
return retval;
|
|
}
|
|
|
|
|
|
static int shpchp_disable_slot (struct slot *p_slot)
|
|
{
|
|
u8 getstatus = 0;
|
|
int rc, retval = -ENODEV;
|
|
struct controller *ctrl = p_slot->ctrl;
|
|
|
|
if (!p_slot->ctrl)
|
|
return -ENODEV;
|
|
|
|
/* Check to see if (latch closed, card present, power on) */
|
|
mutex_lock(&p_slot->ctrl->crit_sect);
|
|
|
|
rc = p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus);
|
|
if (rc || !getstatus) {
|
|
ctrl_info(ctrl, "No adapter on slot(%s)\n", slot_name(p_slot));
|
|
goto out;
|
|
}
|
|
rc = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
|
|
if (rc || getstatus) {
|
|
ctrl_info(ctrl, "Latch open on slot(%s)\n", slot_name(p_slot));
|
|
goto out;
|
|
}
|
|
rc = p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
|
|
if (rc || !getstatus) {
|
|
ctrl_info(ctrl, "Already disabled on slot(%s)\n",
|
|
slot_name(p_slot));
|
|
goto out;
|
|
}
|
|
|
|
retval = remove_board(p_slot);
|
|
update_slot_info(p_slot);
|
|
out:
|
|
mutex_unlock(&p_slot->ctrl->crit_sect);
|
|
return retval;
|
|
}
|
|
|
|
int shpchp_sysfs_enable_slot(struct slot *p_slot)
|
|
{
|
|
int retval = -ENODEV;
|
|
struct controller *ctrl = p_slot->ctrl;
|
|
|
|
mutex_lock(&p_slot->lock);
|
|
switch (p_slot->state) {
|
|
case BLINKINGON_STATE:
|
|
cancel_delayed_work(&p_slot->work);
|
|
fallthrough;
|
|
case STATIC_STATE:
|
|
p_slot->state = POWERON_STATE;
|
|
mutex_unlock(&p_slot->lock);
|
|
retval = shpchp_enable_slot(p_slot);
|
|
mutex_lock(&p_slot->lock);
|
|
p_slot->state = STATIC_STATE;
|
|
break;
|
|
case POWERON_STATE:
|
|
ctrl_info(ctrl, "Slot %s is already in powering on state\n",
|
|
slot_name(p_slot));
|
|
break;
|
|
case BLINKINGOFF_STATE:
|
|
case POWEROFF_STATE:
|
|
ctrl_info(ctrl, "Already enabled on slot %s\n",
|
|
slot_name(p_slot));
|
|
break;
|
|
default:
|
|
ctrl_err(ctrl, "Not a valid state on slot %s\n",
|
|
slot_name(p_slot));
|
|
break;
|
|
}
|
|
mutex_unlock(&p_slot->lock);
|
|
|
|
return retval;
|
|
}
|
|
|
|
int shpchp_sysfs_disable_slot(struct slot *p_slot)
|
|
{
|
|
int retval = -ENODEV;
|
|
struct controller *ctrl = p_slot->ctrl;
|
|
|
|
mutex_lock(&p_slot->lock);
|
|
switch (p_slot->state) {
|
|
case BLINKINGOFF_STATE:
|
|
cancel_delayed_work(&p_slot->work);
|
|
fallthrough;
|
|
case STATIC_STATE:
|
|
p_slot->state = POWEROFF_STATE;
|
|
mutex_unlock(&p_slot->lock);
|
|
retval = shpchp_disable_slot(p_slot);
|
|
mutex_lock(&p_slot->lock);
|
|
p_slot->state = STATIC_STATE;
|
|
break;
|
|
case POWEROFF_STATE:
|
|
ctrl_info(ctrl, "Slot %s is already in powering off state\n",
|
|
slot_name(p_slot));
|
|
break;
|
|
case BLINKINGON_STATE:
|
|
case POWERON_STATE:
|
|
ctrl_info(ctrl, "Already disabled on slot %s\n",
|
|
slot_name(p_slot));
|
|
break;
|
|
default:
|
|
ctrl_err(ctrl, "Not a valid state on slot %s\n",
|
|
slot_name(p_slot));
|
|
break;
|
|
}
|
|
mutex_unlock(&p_slot->lock);
|
|
|
|
return retval;
|
|
}
|