linux_dsm_epyc7002/include/linux/msi.h

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#ifndef LINUX_MSI_H
#define LINUX_MSI_H
#include <linux/kobject.h>
#include <linux/list.h>
struct msi_msg {
u32 address_lo; /* low 32 bits of msi message address */
u32 address_hi; /* high 32 bits of msi message address */
u32 data; /* 16 bits of msi message data */
};
extern int pci_msi_ignore_mask;
/* Helper functions */
struct irq_data;
struct msi_desc;
struct pci_dev;
drivers/base: Add MSI domain support for non-PCI devices With the msi_list and the msi_domain properties now being at the generic device level, it is starting to be relatively easy to offer a generic way of providing non-PCI MSIs. The two major hurdles with this idea are: - Lack of global ID that identifies a device: this is worked around by having a global ID allocator for each device that gets enrolled in the platform MSI subsystem - Lack of standard way to write the message in the generating device. This is solved by mandating driver code to provide a write_msg callback, so that everyone can have their own square wheel Apart from that, the API is fairly straightforward: - platform_msi_create_irq_domain creates an MSI domain that gets tagged with DOMAIN_BUS_PLATFORM_MSI - platform_msi_domain_alloc_irqs allocate MSIs for a given device, populating the msi_list - platform_msi_domain_free_irqs does what is written on the tin [ tglx: Created a seperate struct platform_msi_desc and added kerneldoc entries ] Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Cc: <linux-arm-kernel@lists.infradead.org> Cc: Yijing Wang <wangyijing@huawei.com> Cc: Ma Jun <majun258@huawei.com> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: Duc Dang <dhdang@apm.com> Cc: Hanjun Guo <hanjun.guo@linaro.org> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Jiang Liu <jiang.liu@linux.intel.com> Cc: Jason Cooper <jason@lakedaemon.net> Link: http://lkml.kernel.org/r/1438091186-10244-10-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-07-28 20:46:16 +07:00
struct platform_msi_priv_data;
void __get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
void get_cached_msi_msg(unsigned int irq, struct msi_msg *msg);
drivers/base: Add MSI domain support for non-PCI devices With the msi_list and the msi_domain properties now being at the generic device level, it is starting to be relatively easy to offer a generic way of providing non-PCI MSIs. The two major hurdles with this idea are: - Lack of global ID that identifies a device: this is worked around by having a global ID allocator for each device that gets enrolled in the platform MSI subsystem - Lack of standard way to write the message in the generating device. This is solved by mandating driver code to provide a write_msg callback, so that everyone can have their own square wheel Apart from that, the API is fairly straightforward: - platform_msi_create_irq_domain creates an MSI domain that gets tagged with DOMAIN_BUS_PLATFORM_MSI - platform_msi_domain_alloc_irqs allocate MSIs for a given device, populating the msi_list - platform_msi_domain_free_irqs does what is written on the tin [ tglx: Created a seperate struct platform_msi_desc and added kerneldoc entries ] Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Cc: <linux-arm-kernel@lists.infradead.org> Cc: Yijing Wang <wangyijing@huawei.com> Cc: Ma Jun <majun258@huawei.com> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: Duc Dang <dhdang@apm.com> Cc: Hanjun Guo <hanjun.guo@linaro.org> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Jiang Liu <jiang.liu@linux.intel.com> Cc: Jason Cooper <jason@lakedaemon.net> Link: http://lkml.kernel.org/r/1438091186-10244-10-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-07-28 20:46:16 +07:00
typedef void (*irq_write_msi_msg_t)(struct msi_desc *desc,
struct msi_msg *msg);
/**
* platform_msi_desc - Platform device specific msi descriptor data
* @msi_priv_data: Pointer to platform private data
* @msi_index: The index of the MSI descriptor for multi MSI
*/
struct platform_msi_desc {
struct platform_msi_priv_data *msi_priv_data;
u16 msi_index;
};
/**
* struct msi_desc - Descriptor structure for MSI based interrupts
* @list: List head for management
* @irq: The base interrupt number
* @nvec_used: The number of vectors used
* @dev: Pointer to the device which uses this descriptor
* @msg: The last set MSI message cached for reuse
*
* @masked: [PCI MSI/X] Mask bits
* @is_msix: [PCI MSI/X] True if MSI-X
* @multiple: [PCI MSI/X] log2 num of messages allocated
* @multi_cap: [PCI MSI/X] log2 num of messages supported
* @maskbit: [PCI MSI/X] Mask-Pending bit supported?
* @is_64: [PCI MSI/X] Address size: 0=32bit 1=64bit
* @entry_nr: [PCI MSI/X] Entry which is described by this descriptor
* @default_irq:[PCI MSI/X] The default pre-assigned non-MSI irq
* @mask_pos: [PCI MSI] Mask register position
* @mask_base: [PCI MSI-X] Mask register base address
drivers/base: Add MSI domain support for non-PCI devices With the msi_list and the msi_domain properties now being at the generic device level, it is starting to be relatively easy to offer a generic way of providing non-PCI MSIs. The two major hurdles with this idea are: - Lack of global ID that identifies a device: this is worked around by having a global ID allocator for each device that gets enrolled in the platform MSI subsystem - Lack of standard way to write the message in the generating device. This is solved by mandating driver code to provide a write_msg callback, so that everyone can have their own square wheel Apart from that, the API is fairly straightforward: - platform_msi_create_irq_domain creates an MSI domain that gets tagged with DOMAIN_BUS_PLATFORM_MSI - platform_msi_domain_alloc_irqs allocate MSIs for a given device, populating the msi_list - platform_msi_domain_free_irqs does what is written on the tin [ tglx: Created a seperate struct platform_msi_desc and added kerneldoc entries ] Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Cc: <linux-arm-kernel@lists.infradead.org> Cc: Yijing Wang <wangyijing@huawei.com> Cc: Ma Jun <majun258@huawei.com> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: Duc Dang <dhdang@apm.com> Cc: Hanjun Guo <hanjun.guo@linaro.org> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Jiang Liu <jiang.liu@linux.intel.com> Cc: Jason Cooper <jason@lakedaemon.net> Link: http://lkml.kernel.org/r/1438091186-10244-10-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-07-28 20:46:16 +07:00
* @platform: [platform] Platform device specific msi descriptor data
*/
struct msi_desc {
/* Shared device/bus type independent data */
struct list_head list;
unsigned int irq;
unsigned int nvec_used;
struct device *dev;
struct msi_msg msg;
union {
/* PCI MSI/X specific data */
struct {
u32 masked;
struct {
__u8 is_msix : 1;
__u8 multiple : 3;
__u8 multi_cap : 3;
__u8 maskbit : 1;
__u8 is_64 : 1;
__u16 entry_nr;
unsigned default_irq;
} msi_attrib;
union {
u8 mask_pos;
void __iomem *mask_base;
};
};
/*
* Non PCI variants add their data structure here. New
* entries need to use a named structure. We want
* proper name spaces for this. The PCI part is
* anonymous for now as it would require an immediate
* tree wide cleanup.
*/
drivers/base: Add MSI domain support for non-PCI devices With the msi_list and the msi_domain properties now being at the generic device level, it is starting to be relatively easy to offer a generic way of providing non-PCI MSIs. The two major hurdles with this idea are: - Lack of global ID that identifies a device: this is worked around by having a global ID allocator for each device that gets enrolled in the platform MSI subsystem - Lack of standard way to write the message in the generating device. This is solved by mandating driver code to provide a write_msg callback, so that everyone can have their own square wheel Apart from that, the API is fairly straightforward: - platform_msi_create_irq_domain creates an MSI domain that gets tagged with DOMAIN_BUS_PLATFORM_MSI - platform_msi_domain_alloc_irqs allocate MSIs for a given device, populating the msi_list - platform_msi_domain_free_irqs does what is written on the tin [ tglx: Created a seperate struct platform_msi_desc and added kerneldoc entries ] Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Cc: <linux-arm-kernel@lists.infradead.org> Cc: Yijing Wang <wangyijing@huawei.com> Cc: Ma Jun <majun258@huawei.com> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: Duc Dang <dhdang@apm.com> Cc: Hanjun Guo <hanjun.guo@linaro.org> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Jiang Liu <jiang.liu@linux.intel.com> Cc: Jason Cooper <jason@lakedaemon.net> Link: http://lkml.kernel.org/r/1438091186-10244-10-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-07-28 20:46:16 +07:00
struct platform_msi_desc platform;
};
};
/* Helpers to hide struct msi_desc implementation details */
#define msi_desc_to_dev(desc) ((desc)->dev)
#define dev_to_msi_list(dev) (&(dev)->msi_list)
#define first_msi_entry(dev) \
list_first_entry(dev_to_msi_list((dev)), struct msi_desc, list)
#define for_each_msi_entry(desc, dev) \
list_for_each_entry((desc), dev_to_msi_list((dev)), list)
#ifdef CONFIG_PCI_MSI
#define first_pci_msi_entry(pdev) first_msi_entry(&(pdev)->dev)
#define for_each_pci_msi_entry(desc, pdev) \
for_each_msi_entry((desc), &(pdev)->dev)
struct pci_dev *msi_desc_to_pci_dev(struct msi_desc *desc);
void *msi_desc_to_pci_sysdata(struct msi_desc *desc);
#else /* CONFIG_PCI_MSI */
static inline void *msi_desc_to_pci_sysdata(struct msi_desc *desc)
{
return NULL;
}
#endif /* CONFIG_PCI_MSI */
struct msi_desc *alloc_msi_entry(struct device *dev);
void free_msi_entry(struct msi_desc *entry);
void __pci_read_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
void __pci_write_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
void pci_write_msi_msg(unsigned int irq, struct msi_msg *msg);
u32 __pci_msix_desc_mask_irq(struct msi_desc *desc, u32 flag);
u32 __pci_msi_desc_mask_irq(struct msi_desc *desc, u32 mask, u32 flag);
void pci_msi_mask_irq(struct irq_data *data);
void pci_msi_unmask_irq(struct irq_data *data);
/* Conversion helpers. Should be removed after merging */
static inline void __write_msi_msg(struct msi_desc *entry, struct msi_msg *msg)
{
__pci_write_msi_msg(entry, msg);
}
static inline void write_msi_msg(int irq, struct msi_msg *msg)
{
pci_write_msi_msg(irq, msg);
}
static inline void mask_msi_irq(struct irq_data *data)
{
pci_msi_mask_irq(data);
}
static inline void unmask_msi_irq(struct irq_data *data)
{
pci_msi_unmask_irq(data);
}
/*
PCI: use weak functions for MSI arch-specific functions Until now, the MSI architecture-specific functions could be overloaded using a fairly complex set of #define and compile-time conditionals. In order to prepare for the introduction of the msi_chip infrastructure, it is desirable to switch all those functions to use the 'weak' mechanism. This commit converts all the architectures that were overidding those MSI functions to use the new strategy. Note that we keep two separate, non-weak, functions default_teardown_msi_irqs() and default_restore_msi_irqs() for the default behavior of the arch_teardown_msi_irqs() and arch_restore_msi_irqs(), as the default behavior is needed by x86 PCI code. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Tested-by: Daniel Price <daniel.price@gmail.com> Tested-by: Thierry Reding <thierry.reding@gmail.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: linuxppc-dev@lists.ozlabs.org Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: linux390@de.ibm.com Cc: linux-s390@vger.kernel.org Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: x86@kernel.org Cc: Russell King <linux@arm.linux.org.uk> Cc: Tony Luck <tony.luck@intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: linux-ia64@vger.kernel.org Cc: Ralf Baechle <ralf@linux-mips.org> Cc: linux-mips@linux-mips.org Cc: David S. Miller <davem@davemloft.net> Cc: sparclinux@vger.kernel.org Cc: Chris Metcalf <cmetcalf@tilera.com> Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2013-08-10 03:27:06 +07:00
* The arch hooks to setup up msi irqs. Those functions are
* implemented as weak symbols so that they /can/ be overriden by
* architecture specific code if needed.
*/
int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc);
void arch_teardown_msi_irq(unsigned int irq);
int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type);
void arch_teardown_msi_irqs(struct pci_dev *dev);
void arch_restore_msi_irqs(struct pci_dev *dev);
PCI: use weak functions for MSI arch-specific functions Until now, the MSI architecture-specific functions could be overloaded using a fairly complex set of #define and compile-time conditionals. In order to prepare for the introduction of the msi_chip infrastructure, it is desirable to switch all those functions to use the 'weak' mechanism. This commit converts all the architectures that were overidding those MSI functions to use the new strategy. Note that we keep two separate, non-weak, functions default_teardown_msi_irqs() and default_restore_msi_irqs() for the default behavior of the arch_teardown_msi_irqs() and arch_restore_msi_irqs(), as the default behavior is needed by x86 PCI code. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Tested-by: Daniel Price <daniel.price@gmail.com> Tested-by: Thierry Reding <thierry.reding@gmail.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: linuxppc-dev@lists.ozlabs.org Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: linux390@de.ibm.com Cc: linux-s390@vger.kernel.org Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: x86@kernel.org Cc: Russell King <linux@arm.linux.org.uk> Cc: Tony Luck <tony.luck@intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: linux-ia64@vger.kernel.org Cc: Ralf Baechle <ralf@linux-mips.org> Cc: linux-mips@linux-mips.org Cc: David S. Miller <davem@davemloft.net> Cc: sparclinux@vger.kernel.org Cc: Chris Metcalf <cmetcalf@tilera.com> Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2013-08-10 03:27:06 +07:00
void default_teardown_msi_irqs(struct pci_dev *dev);
void default_restore_msi_irqs(struct pci_dev *dev);
struct msi_controller {
struct module *owner;
struct device *dev;
struct device_node *of_node;
struct list_head list;
int (*setup_irq)(struct msi_controller *chip, struct pci_dev *dev,
struct msi_desc *desc);
void (*teardown_irq)(struct msi_controller *chip, unsigned int irq);
};
#ifdef CONFIG_GENERIC_MSI_IRQ_DOMAIN
#include <linux/irqhandler.h>
#include <asm/msi.h>
struct irq_domain;
struct irq_chip;
struct device_node;
struct msi_domain_info;
/**
* struct msi_domain_ops - MSI interrupt domain callbacks
* @get_hwirq: Retrieve the resulting hw irq number
* @msi_init: Domain specific init function for MSI interrupts
* @msi_free: Domain specific function to free a MSI interrupts
* @msi_check: Callback for verification of the domain/info/dev data
* @msi_prepare: Prepare the allocation of the interrupts in the domain
* @msi_finish: Optional callbacl to finalize the allocation
* @set_desc: Set the msi descriptor for an interrupt
* @handle_error: Optional error handler if the allocation fails
*
* @get_hwirq, @msi_init and @msi_free are callbacks used by
* msi_create_irq_domain() and related interfaces
*
* @msi_check, @msi_prepare, @msi_finish, @set_desc and @handle_error
* are callbacks used by msi_irq_domain_alloc_irqs() and related
* interfaces which are based on msi_desc.
*/
struct msi_domain_ops {
irq_hw_number_t (*get_hwirq)(struct msi_domain_info *info,
msi_alloc_info_t *arg);
int (*msi_init)(struct irq_domain *domain,
struct msi_domain_info *info,
unsigned int virq, irq_hw_number_t hwirq,
msi_alloc_info_t *arg);
void (*msi_free)(struct irq_domain *domain,
struct msi_domain_info *info,
unsigned int virq);
int (*msi_check)(struct irq_domain *domain,
struct msi_domain_info *info,
struct device *dev);
int (*msi_prepare)(struct irq_domain *domain,
struct device *dev, int nvec,
msi_alloc_info_t *arg);
void (*msi_finish)(msi_alloc_info_t *arg, int retval);
void (*set_desc)(msi_alloc_info_t *arg,
struct msi_desc *desc);
int (*handle_error)(struct irq_domain *domain,
struct msi_desc *desc, int error);
};
/**
* struct msi_domain_info - MSI interrupt domain data
* @flags: Flags to decribe features and capabilities
* @ops: The callback data structure
* @chip: Optional: associated interrupt chip
* @chip_data: Optional: associated interrupt chip data
* @handler: Optional: associated interrupt flow handler
* @handler_data: Optional: associated interrupt flow handler data
* @handler_name: Optional: associated interrupt flow handler name
* @data: Optional: domain specific data
*/
struct msi_domain_info {
u32 flags;
struct msi_domain_ops *ops;
struct irq_chip *chip;
void *chip_data;
irq_flow_handler_t handler;
void *handler_data;
const char *handler_name;
void *data;
};
/* Flags for msi_domain_info */
enum {
/*
* Init non implemented ops callbacks with default MSI domain
* callbacks.
*/
MSI_FLAG_USE_DEF_DOM_OPS = (1 << 0),
/*
* Init non implemented chip callbacks with default MSI chip
* callbacks.
*/
MSI_FLAG_USE_DEF_CHIP_OPS = (1 << 1),
/* Build identity map between hwirq and irq */
MSI_FLAG_IDENTITY_MAP = (1 << 2),
/* Support multiple PCI MSI interrupts */
MSI_FLAG_MULTI_PCI_MSI = (1 << 3),
/* Support PCI MSIX interrupts */
MSI_FLAG_PCI_MSIX = (1 << 4),
};
int msi_domain_set_affinity(struct irq_data *data, const struct cpumask *mask,
bool force);
struct irq_domain *msi_create_irq_domain(struct device_node *of_node,
struct msi_domain_info *info,
struct irq_domain *parent);
int msi_domain_alloc_irqs(struct irq_domain *domain, struct device *dev,
int nvec);
void msi_domain_free_irqs(struct irq_domain *domain, struct device *dev);
struct msi_domain_info *msi_get_domain_info(struct irq_domain *domain);
drivers/base: Add MSI domain support for non-PCI devices With the msi_list and the msi_domain properties now being at the generic device level, it is starting to be relatively easy to offer a generic way of providing non-PCI MSIs. The two major hurdles with this idea are: - Lack of global ID that identifies a device: this is worked around by having a global ID allocator for each device that gets enrolled in the platform MSI subsystem - Lack of standard way to write the message in the generating device. This is solved by mandating driver code to provide a write_msg callback, so that everyone can have their own square wheel Apart from that, the API is fairly straightforward: - platform_msi_create_irq_domain creates an MSI domain that gets tagged with DOMAIN_BUS_PLATFORM_MSI - platform_msi_domain_alloc_irqs allocate MSIs for a given device, populating the msi_list - platform_msi_domain_free_irqs does what is written on the tin [ tglx: Created a seperate struct platform_msi_desc and added kerneldoc entries ] Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Cc: <linux-arm-kernel@lists.infradead.org> Cc: Yijing Wang <wangyijing@huawei.com> Cc: Ma Jun <majun258@huawei.com> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: Duc Dang <dhdang@apm.com> Cc: Hanjun Guo <hanjun.guo@linaro.org> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Jiang Liu <jiang.liu@linux.intel.com> Cc: Jason Cooper <jason@lakedaemon.net> Link: http://lkml.kernel.org/r/1438091186-10244-10-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-07-28 20:46:16 +07:00
struct irq_domain *platform_msi_create_irq_domain(struct device_node *np,
struct msi_domain_info *info,
struct irq_domain *parent);
int platform_msi_domain_alloc_irqs(struct device *dev, unsigned int nvec,
irq_write_msi_msg_t write_msi_msg);
void platform_msi_domain_free_irqs(struct device *dev);
#endif /* CONFIG_GENERIC_MSI_IRQ_DOMAIN */
#ifdef CONFIG_PCI_MSI_IRQ_DOMAIN
void pci_msi_domain_write_msg(struct irq_data *irq_data, struct msi_msg *msg);
struct irq_domain *pci_msi_create_irq_domain(struct device_node *node,
struct msi_domain_info *info,
struct irq_domain *parent);
int pci_msi_domain_alloc_irqs(struct irq_domain *domain, struct pci_dev *dev,
int nvec, int type);
void pci_msi_domain_free_irqs(struct irq_domain *domain, struct pci_dev *dev);
struct irq_domain *pci_msi_create_default_irq_domain(struct device_node *node,
struct msi_domain_info *info, struct irq_domain *parent);
irq_hw_number_t pci_msi_domain_calc_hwirq(struct pci_dev *dev,
struct msi_desc *desc);
int pci_msi_domain_check_cap(struct irq_domain *domain,
struct msi_domain_info *info, struct device *dev);
#endif /* CONFIG_PCI_MSI_IRQ_DOMAIN */
#endif /* LINUX_MSI_H */