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65f27f3844
Pass the work_struct pointer to the work function rather than context data. The work function can use container_of() to work out the data. For the cases where the container of the work_struct may go away the moment the pending bit is cleared, it is made possible to defer the release of the structure by deferring the clearing of the pending bit. To make this work, an extra flag is introduced into the management side of the work_struct. This governs auto-release of the structure upon execution. Ordinarily, the work queue executor would release the work_struct for further scheduling or deallocation by clearing the pending bit prior to jumping to the work function. This means that, unless the driver makes some guarantee itself that the work_struct won't go away, the work function may not access anything else in the work_struct or its container lest they be deallocated.. This is a problem if the auxiliary data is taken away (as done by the last patch). However, if the pending bit is *not* cleared before jumping to the work function, then the work function *may* access the work_struct and its container with no problems. But then the work function must itself release the work_struct by calling work_release(). In most cases, automatic release is fine, so this is the default. Special initiators exist for the non-auto-release case (ending in _NAR). Signed-Off-By: David Howells <dhowells@redhat.com>
125 lines
3.1 KiB
C
125 lines
3.1 KiB
C
/*
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* Copyright (C) 2006 Intel Corp.
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* Tom Long Nguyen (tom.l.nguyen@intel.com)
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* Zhang Yanmin (yanmin.zhang@intel.com)
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*
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*/
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#ifndef _AERDRV_H_
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#define _AERDRV_H_
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#include <linux/pcieport_if.h>
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#include <linux/aer.h>
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#define AER_NONFATAL 0
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#define AER_FATAL 1
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#define AER_CORRECTABLE 2
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#define AER_UNCORRECTABLE 4
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#define AER_ERROR_MASK 0x001fffff
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#define AER_ERROR(d) (d & AER_ERROR_MASK)
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#define OSC_METHOD_RUN_SUCCESS 0
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#define OSC_METHOD_NOT_SUPPORTED 1
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#define OSC_METHOD_RUN_FAILURE 2
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/* Root Error Status Register Bits */
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#define ROOT_ERR_STATUS_MASKS 0x0f
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#define SYSTEM_ERROR_INTR_ON_MESG_MASK (PCI_EXP_RTCTL_SECEE| \
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PCI_EXP_RTCTL_SENFEE| \
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PCI_EXP_RTCTL_SEFEE)
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#define ROOT_PORT_INTR_ON_MESG_MASK (PCI_ERR_ROOT_CMD_COR_EN| \
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PCI_ERR_ROOT_CMD_NONFATAL_EN| \
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PCI_ERR_ROOT_CMD_FATAL_EN)
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#define ERR_COR_ID(d) (d & 0xffff)
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#define ERR_UNCOR_ID(d) (d >> 16)
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#define AER_SUCCESS 0
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#define AER_UNSUCCESS 1
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#define AER_ERROR_SOURCES_MAX 100
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#define AER_LOG_TLP_MASKS (PCI_ERR_UNC_POISON_TLP| \
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PCI_ERR_UNC_ECRC| \
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PCI_ERR_UNC_UNSUP| \
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PCI_ERR_UNC_COMP_ABORT| \
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PCI_ERR_UNC_UNX_COMP| \
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PCI_ERR_UNC_MALF_TLP)
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/* AER Error Info Flags */
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#define AER_TLP_HEADER_VALID_FLAG 0x00000001
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#define AER_MULTI_ERROR_VALID_FLAG 0x00000002
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#define ERR_CORRECTABLE_ERROR_MASK 0x000031c1
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#define ERR_UNCORRECTABLE_ERROR_MASK 0x001ff010
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struct header_log_regs {
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unsigned int dw0;
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unsigned int dw1;
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unsigned int dw2;
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unsigned int dw3;
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};
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struct aer_err_info {
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int severity; /* 0:NONFATAL | 1:FATAL | 2:COR */
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int flags;
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unsigned int status; /* COR/UNCOR Error Status */
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struct header_log_regs tlp; /* TLP Header */
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};
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struct aer_err_source {
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unsigned int status;
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unsigned int id;
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};
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struct aer_rpc {
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struct pcie_device *rpd; /* Root Port device */
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struct work_struct dpc_handler;
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struct aer_err_source e_sources[AER_ERROR_SOURCES_MAX];
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unsigned short prod_idx; /* Error Producer Index */
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unsigned short cons_idx; /* Error Consumer Index */
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int isr;
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spinlock_t e_lock; /*
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* Lock access to Error Status/ID Regs
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* and error producer/consumer index
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*/
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struct mutex rpc_mutex; /*
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* only one thread could do
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* recovery on the same
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* root port hierachy
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*/
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wait_queue_head_t wait_release;
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};
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struct aer_broadcast_data {
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enum pci_channel_state state;
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enum pci_ers_result result;
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};
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static inline pci_ers_result_t merge_result(enum pci_ers_result orig,
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enum pci_ers_result new)
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{
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switch (orig) {
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case PCI_ERS_RESULT_CAN_RECOVER:
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case PCI_ERS_RESULT_RECOVERED:
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orig = new;
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break;
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case PCI_ERS_RESULT_DISCONNECT:
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if (new == PCI_ERS_RESULT_NEED_RESET)
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orig = new;
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break;
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default:
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break;
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}
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return orig;
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}
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extern struct bus_type pcie_port_bus_type;
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extern void aer_enable_rootport(struct aer_rpc *rpc);
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extern void aer_delete_rootport(struct aer_rpc *rpc);
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extern int aer_init(struct pcie_device *dev);
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extern void aer_isr(struct work_struct *work);
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extern void aer_print_error(struct pci_dev *dev, struct aer_err_info *info);
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extern int aer_osc_setup(struct pci_dev *dev);
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#endif //_AERDRV_H_
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