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authorEric W. Biederman <ebiederm@xmission.com>2006-10-04 02:16:59 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-04 07:55:29 -0700
commit3b7d1921f4cdd6d6ddb7899ae7a8d413991c5cf4 (patch)
tree5f809e0c4310f60dfa6f65d54fbaf9f01e2ebff9 /include/linux/pci.h
parent277bc33bc2479707e88b0b2ae6fe56e8e4aabe81 (diff)
downloadop-kernel-dev-3b7d1921f4cdd6d6ddb7899ae7a8d413991c5cf4.zip
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[PATCH] msi: refactor and move the msi irq_chip into the arch code
It turns out msi_ops was simply not enough to abstract the architecture specific details of msi. So I have moved the resposibility of constructing the struct irq_chip to the architectures, and have two architecture specific functions arch_setup_msi_irq, and arch_teardown_msi_irq. For simple architectures those functions can do all of the work. For architectures with platform dependencies they can call into the appropriate platform code. With this msi.c is finally free of assuming you have an apic, and this actually takes less code. The helpers for the architecture specific code are declared in the linux/msi.h to keep them separate from the msi functions used by drivers in linux/pci.h Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Tony Luck <tony.luck@intel.com> Cc: Andi Kleen <ak@suse.de> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Greg KH <greg@kroah.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/pci.h')
-rw-r--r--include/linux/pci.h67
1 files changed, 0 insertions, 67 deletions
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 9b34bc8..0da5a4a8 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -595,11 +595,6 @@ struct msix_entry {
u16 entry; /* driver uses to specify entry, OS writes */
};
-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 */
-};
#ifndef CONFIG_PCI_MSI
static inline void pci_scan_msi_device(struct pci_dev *dev) {}
@@ -617,68 +612,6 @@ extern int pci_enable_msix(struct pci_dev* dev,
struct msix_entry *entries, int nvec);
extern void pci_disable_msix(struct pci_dev *dev);
extern void msi_remove_pci_irq_vectors(struct pci_dev *dev);
-
-/*
- * MSI operation vector. Used by the msi core code (drivers/pci/msi.c)
- * to abstract platform-specific tasks relating to MSI address generation
- * and resource management.
- */
-struct msi_ops {
- int needs_64bit_address;
- /**
- * setup - generate an MSI bus address and data for a given vector
- * @pdev: PCI device context (in)
- * @irq: irq allocated by the msi core (in)
- * @msg: PCI bus address and data for msi message (out)
- *
- * Description: The setup op is used to generate a PCI bus addres and
- * data which the msi core will program into the card MSI capability
- * registers. The setup routine is responsible for picking an initial
- * cpu to target the MSI at. The setup routine is responsible for
- * examining pdev to determine the MSI capabilities of the card and
- * generating a suitable address/data. The setup routine is
- * responsible for allocating and tracking any system resources it
- * needs to route the MSI to the cpu it picks, and for associating
- * those resources with the passed in vector.
- *
- * Returns 0 if the MSI address/data was successfully setup.
- **/
-
- int (*setup) (struct pci_dev *pdev, unsigned int irq,
- struct msi_msg *msg);
-
- /**
- * teardown - release resources allocated by setup
- * @vector: vector context for resources (in)
- *
- * Description: The teardown op is used to release any resources
- * that were allocated in the setup routine associated with the passed
- * in vector.
- **/
-
- void (*teardown) (unsigned int irq);
-
- /**
- * target - retarget an MSI at a different cpu
- * @vector: vector context for resources (in)
- * @cpu: new cpu to direct vector at (in)
- * @addr_hi: new value of PCI bus upper 32 bits (in/out)
- * @addr_lo: new value of PCI bus lower 32 bits (in/out)
- *
- * Description: The target op is used to redirect an MSI vector
- * at a different cpu. addr_hi/addr_lo coming in are the existing
- * values that the MSI core has programmed into the card. The
- * target code is responsible for freeing any resources (if any)
- * associated with the old address, and generating a new PCI bus
- * addr_hi/addr_lo that will redirect the vector at the indicated cpu.
- **/
-
- void (*target) (unsigned int irq, cpumask_t cpumask,
- struct msi_msg *msg);
-};
-
-extern int msi_register(struct msi_ops *ops);
-
#endif
#ifdef CONFIG_HT_IRQ
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