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C++ pci_find_ext_capability函数代码示例

原作者: [db:作者] 来自: [db:来源] 收藏 邀请

本文整理汇总了C++中pci_find_ext_capability函数的典型用法代码示例。如果您正苦于以下问题：C++ pci_find_ext_capability函数的具体用法？C++ pci_find_ext_capability怎么用？C++ pci_find_ext_capability使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。



在下文中一共展示了pci_find_ext_capability函数的20个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的C++代码示例。

示例1: pci_enable_pasid

int pci_enable_pasid(struct pci_dev *pdev, int features)
{
	u16 control, supported;
	int pos;

	pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_PASID);
	if (!pos)
		return -EINVAL;

	pci_read_config_word(pdev, pos + PCI_PASID_CTRL, &control);
	pci_read_config_word(pdev, pos + PCI_PASID_CAP, &supported);

	if (control & PCI_PASID_CTRL_ENABLE)
		return -EINVAL;

	supported &= PCI_PASID_CAP_EXEC | PCI_PASID_CAP_PRIV;

	
	if ((supported & features) != features)
		return -EINVAL;

	control = PCI_PASID_CTRL_ENABLE | features;

	pci_write_config_word(pdev, pos + PCI_PASID_CTRL, control);

	return 0;
}
开发者ID:DirtyDroidX，项目名称:android_kernel_htc_m8ul，代码行数:27，代码来源:ats.c


示例2: pci_enable_pri

/**
 * pci_enable_pri - Enable PRI capability
 * @ pdev: PCI device structure
 *
 * Returns 0 on success, negative value on error
 */
int pci_enable_pri(struct pci_dev *pdev, u32 reqs)
{
	u16 control, status;
	u32 max_requests;
	int pos;

	if (WARN_ON(pdev->pri_enabled))
		return -EBUSY;

	pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_PRI);
	if (!pos)
		return -EINVAL;

	pci_read_config_word(pdev, pos + PCI_PRI_STATUS, &status);
	if (!(status & PCI_PRI_STATUS_STOPPED))
		return -EBUSY;

	pci_read_config_dword(pdev, pos + PCI_PRI_MAX_REQ, &max_requests);
	reqs = min(max_requests, reqs);
	pdev->pri_reqs_alloc = reqs;
	pci_write_config_dword(pdev, pos + PCI_PRI_ALLOC_REQ, reqs);

	control = PCI_PRI_CTRL_ENABLE;
	pci_write_config_word(pdev, pos + PCI_PRI_CTRL, control);

	pdev->pri_enabled = 1;

	return 0;
}
开发者ID:ReneNyffenegger，项目名称:linux，代码行数:35，代码来源:ats.c


示例3: aer_enable_rootport

static void aer_enable_rootport(struct aer_rpc *rpc)
{
	struct pci_dev *pdev = rpc->rpd->port;
	int pos, aer_pos;
	u16 reg16;
	u32 reg32;

	pos = pci_pcie_cap(pdev);
	
	pci_read_config_word(pdev, pos+PCI_EXP_DEVSTA, &reg16);
	pci_write_config_word(pdev, pos+PCI_EXP_DEVSTA, reg16);

	
	pci_read_config_word(pdev, pos + PCI_EXP_RTCTL, &reg16);
	reg16 &= ~(SYSTEM_ERROR_INTR_ON_MESG_MASK);
	pci_write_config_word(pdev, pos + PCI_EXP_RTCTL, reg16);

	aer_pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR);
	
	pci_read_config_dword(pdev, aer_pos + PCI_ERR_ROOT_STATUS, &reg32);
	pci_write_config_dword(pdev, aer_pos + PCI_ERR_ROOT_STATUS, reg32);
	pci_read_config_dword(pdev, aer_pos + PCI_ERR_COR_STATUS, &reg32);
	pci_write_config_dword(pdev, aer_pos + PCI_ERR_COR_STATUS, reg32);
	pci_read_config_dword(pdev, aer_pos + PCI_ERR_UNCOR_STATUS, &reg32);
	pci_write_config_dword(pdev, aer_pos + PCI_ERR_UNCOR_STATUS, reg32);

	set_downstream_devices_error_reporting(pdev, true);

	
	pci_read_config_dword(pdev, aer_pos + PCI_ERR_ROOT_COMMAND, &reg32);
	reg32 |= ROOT_PORT_INTR_ON_MESG_MASK;
	pci_write_config_dword(pdev, aer_pos + PCI_ERR_ROOT_COMMAND, reg32);
}
开发者ID:DirtyDroidX，项目名称:android_kernel_htc_m8ul，代码行数:33，代码来源:aerdrv.c


示例4: pci_enable_pcie_error_reporting

int pci_enable_pcie_error_reporting(struct pci_dev *dev)
{
	u16 reg16 = 0;
	int pos;

	if (pcie_aer_get_firmware_first(dev))
		return -EIO;

	pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR);
	if (!pos)
		return -EIO;

	pos = pci_pcie_cap(dev);
	if (!pos)
		return -EIO;

	pci_read_config_word(dev, pos + PCI_EXP_DEVCTL, &reg16);
	reg16 |= (PCI_EXP_DEVCTL_CERE |
		PCI_EXP_DEVCTL_NFERE |
		PCI_EXP_DEVCTL_FERE |
		PCI_EXP_DEVCTL_URRE);
	pci_write_config_word(dev, pos + PCI_EXP_DEVCTL, reg16);

	return 0;
}
开发者ID:CSCLOG，项目名称:beaglebone，代码行数:25，代码来源:aerdrv_core.c


示例5: pci_enable_pasid

/**
 * pci_enable_pasid - Enable the PASID capability
 * @pdev: PCI device structure
 * @features: Features to enable
 *
 * Returns 0 on success, negative value on error. This function checks
 * whether the features are actually supported by the device and returns
 * an error if not.
 */
int pci_enable_pasid(struct pci_dev *pdev, int features)
{
	u16 control, supported;
	int pos;

	if (WARN_ON(pdev->pasid_enabled))
		return -EBUSY;

	pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_PASID);
	if (!pos)
		return -EINVAL;

	pci_read_config_word(pdev, pos + PCI_PASID_CAP, &supported);
	supported &= PCI_PASID_CAP_EXEC | PCI_PASID_CAP_PRIV;

	/* User wants to enable anything unsupported? */
	if ((supported & features) != features)
		return -EINVAL;

	control = PCI_PASID_CTRL_ENABLE | features;
	pdev->pasid_features = features;

	pci_write_config_word(pdev, pos + PCI_PASID_CTRL, control);

	pdev->pasid_enabled = 1;

	return 0;
}
开发者ID:ReneNyffenegger，项目名称:linux，代码行数:37，代码来源:ats.c


示例6: aer_root_reset

static pci_ers_result_t aer_root_reset(struct pci_dev *dev)
{
	u32 reg32;
	int pos;

	pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR);

	/* Disable Root's interrupt in response to error messages */
	pci_read_config_dword(dev, pos + PCI_ERR_ROOT_COMMAND, &reg32);
	reg32 &= ~ROOT_PORT_INTR_ON_MESG_MASK;
	pci_write_config_dword(dev, pos + PCI_ERR_ROOT_COMMAND, reg32);

	aer_do_secondary_bus_reset(dev);
	dev_printk(KERN_DEBUG, &dev->dev, "Root Port link has been reset\n");

	/* Clear Root Error Status */
	pci_read_config_dword(dev, pos + PCI_ERR_ROOT_STATUS, &reg32);
	pci_write_config_dword(dev, pos + PCI_ERR_ROOT_STATUS, reg32);

	/* Enable Root Port's interrupt in response to error messages */
	pci_read_config_dword(dev, pos + PCI_ERR_ROOT_COMMAND, &reg32);
	reg32 |= ROOT_PORT_INTR_ON_MESG_MASK;
	pci_write_config_dword(dev, pos + PCI_ERR_ROOT_COMMAND, reg32);

	return PCI_ERS_RESULT_RECOVERED;
}
开发者ID:Medvedroid，项目名称:OT_903D-kernel-2.6.35.7，代码行数:26，代码来源:aerdrv.c


示例7: is_error_source

/**
 * is_error_source - check whether the device is source of reported error
 * @dev: pointer to pci_dev to be checked
 * @e_info: pointer to reported error info
 */
static bool is_error_source(struct pci_dev *dev, struct aer_err_info *e_info)
{
	int pos;
	u32 status, mask;
	u16 reg16;

	/*
	 * When bus id is equal to 0, it might be a bad id
	 * reported by root port.
	 */
	if (!nosourceid && (PCI_BUS(e_info->id) != 0)) {
		/* Device ID match? */
		if (e_info->id == ((dev->bus->number << 8) | dev->devfn))
			return true;

		/* Continue id comparing if there is no multiple error */
		if (!e_info->multi_error_valid)
			return false;
	}

	/*
	 * When either
	 *      1) nosourceid==y;
	 *      2) bus id is equal to 0. Some ports might lose the bus
	 *              id of error source id;
	 *      3) There are multiple errors and prior id comparing fails;
	 * We check AER status registers to find possible reporter.
	 */
	if (atomic_read(&dev->enable_cnt) == 0)
		return false;
	pos = pci_pcie_cap(dev);
	if (!pos)
		return false;

	/* Check if AER is enabled */
	pci_read_config_word(dev, pos + PCI_EXP_DEVCTL, &reg16);
	if (!(reg16 & (
		PCI_EXP_DEVCTL_CERE |
		PCI_EXP_DEVCTL_NFERE |
		PCI_EXP_DEVCTL_FERE |
		PCI_EXP_DEVCTL_URRE)))
		return false;
	pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR);
	if (!pos)
		return false;

	/* Check if error is recorded */
	if (e_info->severity == AER_CORRECTABLE) {
		pci_read_config_dword(dev, pos + PCI_ERR_COR_STATUS, &status);
		pci_read_config_dword(dev, pos + PCI_ERR_COR_MASK, &mask);
	} else {
		pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS, &status);
		pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_MASK, &mask);
	}
	if (status & ~mask)
		return true;

	return false;
}
开发者ID:CSCLOG，项目名称:beaglebone，代码行数:64，代码来源:aerdrv_core.c


示例8: pci_ats_init

void pci_ats_init(struct pci_dev *dev)
{
	int pos;

	pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ATS);
	if (!pos)
		return;

	dev->ats_cap = pos;
}
开发者ID:ReneNyffenegger，项目名称:linux，代码行数:10，代码来源:ats.c


示例9: pci_enable_pcie_error_reporting

int pci_enable_pcie_error_reporting(struct pci_dev *dev)
{
	if (pcie_aer_get_firmware_first(dev))
		return -EIO;

	if (!pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR))
		return -EIO;

	return pcie_capability_set_word(dev, PCI_EXP_DEVCTL, PCI_EXP_AER_FLAGS);
}
开发者ID:spacex，项目名称:kernel-centos7，代码行数:10，代码来源:aerdrv_core.c


示例10: pci_ptm_init

void pci_ptm_init(struct pci_dev *dev)
{
	int pos;
	u32 cap, ctrl;
	u8 local_clock;
	struct pci_dev *ups;

	if (!pci_is_pcie(dev))
		return;

	pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_PTM);
	if (!pos)
		return;

	/*
	 * Enable PTM only on interior devices (root ports, switch ports,
	 * etc.) on the assumption that it causes no link traffic until an
	 * endpoint enables it.
	 */
	if ((pci_pcie_type(dev) == PCI_EXP_TYPE_ENDPOINT ||
	     pci_pcie_type(dev) == PCI_EXP_TYPE_RC_END))
		return;

	pci_read_config_dword(dev, pos + PCI_PTM_CAP, &cap);
	local_clock = (cap & PCI_PTM_GRANULARITY_MASK) >> 8;

	/*
	 * There's no point in enabling PTM unless it's enabled in the
	 * upstream device or this device can be a PTM Root itself.  Per
	 * the spec recommendation (PCIe r3.1, sec 7.32.3), select the
	 * furthest upstream Time Source as the PTM Root.
	 */
	ups = pci_upstream_bridge(dev);
	if (ups && ups->ptm_enabled) {
		ctrl = PCI_PTM_CTRL_ENABLE;
		if (ups->ptm_granularity == 0)
			dev->ptm_granularity = 0;
		else if (ups->ptm_granularity > local_clock)
			dev->ptm_granularity = ups->ptm_granularity;
	} else {
		if (cap & PCI_PTM_CAP_ROOT) {
			ctrl = PCI_PTM_CTRL_ENABLE | PCI_PTM_CTRL_ROOT;
			dev->ptm_root = 1;
			dev->ptm_granularity = local_clock;
		} else
			return;
	}

	ctrl |= dev->ptm_granularity << 8;
	pci_write_config_dword(dev, pos + PCI_PTM_CTRL, ctrl);
	dev->ptm_enabled = 1;

	pci_ptm_info(dev);
}
开发者ID:AlexShiLucky，项目名称:linux，代码行数:54，代码来源:ptm.c


示例11: pci_disable_pasid

/**
 * pci_disable_pasid - Disable the PASID capability
 * @pdev: PCI device structure
 *
 */
void pci_disable_pasid(struct pci_dev *pdev)
{
	u16 control = 0;
	int pos;

	pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_PASID);
	if (!pos)
		return;

	pci_write_config_word(pdev, pos + PCI_PASID_CTRL, control);
}
开发者ID:openube，项目名称:android_kernel_sony_c2305，代码行数:16，代码来源:ats.c


示例12: pci_disable_pri

/**
 * pci_disable_pri - Disable PRI capability
 * @pdev: PCI device structure
 *
 * Only clears the enabled-bit, regardless of its former value
 */
void pci_disable_pri(struct pci_dev *pdev)
{
	u16 control;
	int pos;

	pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_PRI);
	if (!pos)
		return;

	pci_read_config_word(pdev, pos + PCI_PRI_CTRL, &control);
	control &= ~PCI_PRI_CTRL_ENABLE;
	pci_write_config_word(pdev, pos + PCI_PRI_CTRL, control);
}
开发者ID:openube，项目名称:android_kernel_sony_c2305，代码行数:19，代码来源:ats.c


示例13: pci_pri_enabled

/**
 * pci_pri_enabled - Checks if PRI capability is enabled
 * @pdev: PCI device structure
 *
 * Returns true if PRI is enabled on the device, false otherwise
 */
bool pci_pri_enabled(struct pci_dev *pdev)
{
	u16 control;
	int pos;

	pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_PRI);
	if (!pos)
		return false;

	pci_read_config_word(pdev, pos + PCI_PRI_CTRL, &control);

	return (control & PCI_PRI_CTRL_ENABLE) ? true : false;
}
开发者ID:openube，项目名称:android_kernel_sony_c2305，代码行数:19，代码来源:ats.c


示例14: get_device_error_info

/**
 * get_device_error_info - read error status from dev and store it to info
 * @dev: pointer to the device expected to have a error record
 * @info: pointer to structure to store the error record
 *
 * Return 1 on success, 0 on error.
 *
 * Note that @info is reused among all error devices. Clear fields properly.
 */
static int get_device_error_info(struct pci_dev *dev, struct aer_err_info *info)
{
	int pos, temp;

	/* Must reset in this function */
	info->status = 0;
	info->tlp_header_valid = 0;

	pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR);

	/* The device might not support AER */
	if (!pos)
		return 1;

	if (info->severity == AER_CORRECTABLE) {
		pci_read_config_dword(dev, pos + PCI_ERR_COR_STATUS,
			&info->status);
		pci_read_config_dword(dev, pos + PCI_ERR_COR_MASK,
			&info->mask);
		if (!(info->status & ~info->mask))
			return 0;
	} else if (dev->hdr_type & PCI_HEADER_TYPE_BRIDGE ||
		info->severity == AER_NONFATAL) {

		/* Link is still healthy for IO reads */
		pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS,
			&info->status);
		pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_MASK,
			&info->mask);
		if (!(info->status & ~info->mask))
			return 0;

		/* Get First Error Pointer */
		pci_read_config_dword(dev, pos + PCI_ERR_CAP, &temp);
		info->first_error = PCI_ERR_CAP_FEP(temp);

		if (info->status & AER_LOG_TLP_MASKS) {
			info->tlp_header_valid = 1;
			pci_read_config_dword(dev,
				pos + PCI_ERR_HEADER_LOG, &info->tlp.dw0);
			pci_read_config_dword(dev,
				pos + PCI_ERR_HEADER_LOG + 4, &info->tlp.dw1);
			pci_read_config_dword(dev,
				pos + PCI_ERR_HEADER_LOG + 8, &info->tlp.dw2);
			pci_read_config_dword(dev,
				pos + PCI_ERR_HEADER_LOG + 12, &info->tlp.dw3);
		}
	}

	return 1;
}
开发者ID:12rafael，项目名称:jellytimekernel，代码行数:60，代码来源:aerdrv_core.c


示例15: aer_irq

irqreturn_t aer_irq(int irq, void *context)
{
	unsigned int status, id;
	struct pcie_device *pdev = (struct pcie_device *)context;
	struct aer_rpc *rpc = get_service_data(pdev);
	int next_prod_idx;
	unsigned long flags;
	int pos;

	pos = pci_find_ext_capability(pdev->port, PCI_EXT_CAP_ID_ERR);
	/*
                                                                 
                                          
  */
	spin_lock_irqsave(&rpc->e_lock, flags);

	/*                   */
	pci_read_config_dword(pdev->port, pos + PCI_ERR_ROOT_STATUS, &status);
	if (!(status & (PCI_ERR_ROOT_UNCOR_RCV|PCI_ERR_ROOT_COR_RCV))) {
		spin_unlock_irqrestore(&rpc->e_lock, flags);
		return IRQ_NONE;
	}

	/*                                          */
	pci_read_config_dword(pdev->port, pos + PCI_ERR_ROOT_ERR_SRC, &id);
	pci_write_config_dword(pdev->port, pos + PCI_ERR_ROOT_STATUS, status);

	/*                                          */
	next_prod_idx = rpc->prod_idx + 1;
	if (next_prod_idx == AER_ERROR_SOURCES_MAX)
		next_prod_idx = 0;
	if (next_prod_idx == rpc->cons_idx) {
		/*
                                                              
                    
   */
		spin_unlock_irqrestore(&rpc->e_lock, flags);
		return IRQ_HANDLED;
	}
	rpc->e_sources[rpc->prod_idx].status =  status;
	rpc->e_sources[rpc->prod_idx].id = id;
	rpc->prod_idx = next_prod_idx;
	spin_unlock_irqrestore(&rpc->e_lock, flags);

	/*                     */
	schedule_work(&rpc->dpc_handler);

	return IRQ_HANDLED;
}
开发者ID:romanbb，项目名称:android_kernel_lge_d851，代码行数:49，代码来源:aerdrv.c


示例16: aer_irq

/**
 * aer_irq - Root Port's ISR
 * @irq: IRQ assigned to Root Port
 * @context: pointer to Root Port data structure
 *
 * Invoked when Root Port detects AER messages.
 **/
irqreturn_t aer_irq(int irq, void *context)
{
	unsigned int status, id;
	struct pcie_device *pdev = (struct pcie_device *)context;
	struct aer_rpc *rpc = get_service_data(pdev);
	int next_prod_idx;
	unsigned long flags;
	int pos;

	pos = pci_find_ext_capability(pdev->port, PCI_EXT_CAP_ID_ERR);
	/*
	 * Must lock access to Root Error Status Reg, Root Error ID Reg,
	 * and Root error producer/consumer index
	 */
	spin_lock_irqsave(&rpc->e_lock, flags);

	/* Read error status */
	pci_read_config_dword(pdev->port, pos + PCI_ERR_ROOT_STATUS, &status);
	if (!(status & ROOT_ERR_STATUS_MASKS)) {
		spin_unlock_irqrestore(&rpc->e_lock, flags);
		return IRQ_NONE;
	}

	/* Read error source and clear error status */
	pci_read_config_dword(pdev->port, pos + PCI_ERR_ROOT_COR_SRC, &id);
	pci_write_config_dword(pdev->port, pos + PCI_ERR_ROOT_STATUS, status);

	/* Store error source for later DPC handler */
	next_prod_idx = rpc->prod_idx + 1;
	if (next_prod_idx == AER_ERROR_SOURCES_MAX)
		next_prod_idx = 0;
	if (next_prod_idx == rpc->cons_idx) {
		/*
		 * Error Storm Condition - possibly the same error occurred.
		 * Drop the error.
		 */
		spin_unlock_irqrestore(&rpc->e_lock, flags);
		return IRQ_HANDLED;
	}
	rpc->e_sources[rpc->prod_idx].status =  status;
	rpc->e_sources[rpc->prod_idx].id = id;
	rpc->prod_idx = next_prod_idx;
	spin_unlock_irqrestore(&rpc->e_lock, flags);

	/*  Invoke DPC handler */
	schedule_work(&rpc->dpc_handler);

	return IRQ_HANDLED;
}
开发者ID:mikebyrne，项目名称:linux-2.6，代码行数:56，代码来源:aerdrv.c


示例17: pci_pasid_features

/**
 * pci_pasid_features - Check which PASID features are supported
 * @pdev: PCI device structure
 *
 * Returns a negative value when no PASI capability is present.
 * Otherwise is returns a bitmask with supported features. Current
 * features reported are:
 * PCI_PASID_CAP_EXEC - Execute permission supported
 * PCI_PASID_CAP_PRIV - Privileged mode supported
 */
int pci_pasid_features(struct pci_dev *pdev)
{
	u16 supported;
	int pos;

	pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_PASID);
	if (!pos)
		return -EINVAL;

	pci_read_config_word(pdev, pos + PCI_PASID_CAP, &supported);

	supported &= PCI_PASID_CAP_EXEC | PCI_PASID_CAP_PRIV;

	return supported;
}
开发者ID:ReneNyffenegger，项目名称:linux，代码行数:25，代码来源:ats.c


示例18: pci_max_pasids

/**
 * pci_max_pasid - Get maximum number of PASIDs supported by device
 * @pdev: PCI device structure
 *
 * Returns negative value when PASID capability is not present.
 * Otherwise it returns the numer of supported PASIDs.
 */
int pci_max_pasids(struct pci_dev *pdev)
{
	u16 supported;
	int pos;

	pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_PASID);
	if (!pos)
		return -EINVAL;

	pci_read_config_word(pdev, pos + PCI_PASID_CAP, &supported);

	supported = (supported & PASID_NUMBER_MASK) >> PASID_NUMBER_SHIFT;

	return (1 << supported);
}
开发者ID:ReneNyffenegger，项目名称:linux，代码行数:22，代码来源:ats.c


示例19: pcie_unmask_bad_dllp

static inline void pcie_unmask_bad_dllp(struct controller *ctrl)
{
	struct pci_dev *dev = ctrl->pcie->port;
	u32 reg;
	int pos;

	pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR);
	if (!pos)
		return;
	pci_read_config_dword(dev, pos + PCI_ERR_COR_MASK, &reg);
	if (!(reg & PCI_ERR_COR_BAD_DLLP))
		return;
	reg &= ~PCI_ERR_COR_BAD_DLLP;
	pci_write_config_dword(dev, pos + PCI_ERR_COR_MASK, reg);
}
开发者ID:325116067，项目名称:semc-qsd8x50，代码行数:15，代码来源:pciehp_hpc.c


示例20: pci_restore_pasid_state

/**
 * pci_restore_pasid_state - Restore PASID capabilities
 * @pdev: PCI device structure
 */
void pci_restore_pasid_state(struct pci_dev *pdev)
{
	u16 control;
	int pos;

	if (!pdev->pasid_enabled)
		return;

	pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_PASID);
	if (!pos)
		return;

	control = PCI_PASID_CTRL_ENABLE | pdev->pasid_features;
	pci_write_config_word(pdev, pos + PCI_PASID_CTRL, control);
}
开发者ID:ReneNyffenegger，项目名称:linux，代码行数:19，代码来源:ats.c



注：本文中的pci_find_ext_capability函数示例由纯净天空整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。

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