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linux_old1/include/linux/ioc3.h

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[PATCH] Altix: ioc3 serial support Add driver support for a 2 port PCI IOC3-based serial card on Altix boxes: This is a re-submission. On the original submission I was asked to organize the code so that the MIPS ioc3 ethernet and serial parts could be used with this driver. Stanislaw Skowronek was kind enough to provide the shim layer for this - thanks Stanislaw. This patch includes the shim layer and the Altix PCI ioc3 serial driver. The MIPS merged ioc3 ethernet and serial support is forthcoming. Signed-off-by: Patrick Gefre <pfg@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-15 05:20:40 +08:00
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (c) 2005 Stanislaw Skowronek <skylark@linux-mips.org>
*/
#ifndef _LINUX_IOC3_H
#define _LINUX_IOC3_H
#include <asm/sn/ioc3.h>
#define IOC3_MAX_SUBMODULES 32
#define IOC3_CLASS_NONE 0
#define IOC3_CLASS_BASE_IP27 1
#define IOC3_CLASS_BASE_IP30 2
#define IOC3_CLASS_MENET_123 3
#define IOC3_CLASS_MENET_4 4
#define IOC3_CLASS_CADDUO 5
#define IOC3_CLASS_SERIAL 6
/* One of these per IOC3 */
struct ioc3_driver_data {
struct list_head list;
int id; /* IOC3 sequence number */
/* PCI mapping */
unsigned long pma; /* physical address */
[PATCH] sn3 iomem annotations and fixes Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-02-01 18:59:06 +08:00
struct ioc3 __iomem *vma; /* pointer to registers */
[PATCH] Altix: ioc3 serial support Add driver support for a 2 port PCI IOC3-based serial card on Altix boxes: This is a re-submission. On the original submission I was asked to organize the code so that the MIPS ioc3 ethernet and serial parts could be used with this driver. Stanislaw Skowronek was kind enough to provide the shim layer for this - thanks Stanislaw. This patch includes the shim layer and the Altix PCI ioc3 serial driver. The MIPS merged ioc3 ethernet and serial support is forthcoming. Signed-off-by: Patrick Gefre <pfg@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-15 05:20:40 +08:00
struct pci_dev *pdev; /* PCI device */
/* IRQ stuff */
int dual_irq; /* set if separate IRQs are used */
int irq_io, irq_eth; /* IRQ numbers */
/* GPIO magic */
spinlock_t gpio_lock;
unsigned int gpdr_shadow;
/* NIC identifiers */
char nic_part[32];
char nic_serial[16];
char nic_mac[6];
/* submodule set */
int class;
void *data[IOC3_MAX_SUBMODULES]; /* for submodule use */
int active[IOC3_MAX_SUBMODULES]; /* set if probe succeeds */
/* is_ir_lock must be held while
* modifying sio_ie values, so
* we can be sure that sio_ie is
* not changing when we read it
* along with sio_ir.
*/
spinlock_t ir_lock; /* SIO_IE[SC] mod lock */
};
/* One per submodule */
struct ioc3_submodule {
char *name; /* descriptive submodule name */
struct module *owner; /* owning kernel module */
int ethernet; /* set for ethernet drivers */
int (*probe) (struct ioc3_submodule *, struct ioc3_driver_data *);
int (*remove) (struct ioc3_submodule *, struct ioc3_driver_data *);
int id; /* assigned by IOC3, index for the "data" array */
/* IRQ stuff */
unsigned int irq_mask; /* IOC3 IRQ mask, leave clear for Ethernet */
int reset_mask; /* non-zero if you want the ioc3.c module to reset interrupts */
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers Maintain a per-CPU global "struct pt_regs *" variable which can be used instead of passing regs around manually through all ~1800 interrupt handlers in the Linux kernel. The regs pointer is used in few places, but it potentially costs both stack space and code to pass it around. On the FRV arch, removing the regs parameter from all the genirq function results in a 20% speed up of the IRQ exit path (ie: from leaving timer_interrupt() to leaving do_IRQ()). Where appropriate, an arch may override the generic storage facility and do something different with the variable. On FRV, for instance, the address is maintained in GR28 at all times inside the kernel as part of general exception handling. Having looked over the code, it appears that the parameter may be handed down through up to twenty or so layers of functions. Consider a USB character device attached to a USB hub, attached to a USB controller that posts its interrupts through a cascaded auxiliary interrupt controller. A character device driver may want to pass regs to the sysrq handler through the input layer which adds another few layers of parameter passing. I've build this code with allyesconfig for x86_64 and i386. I've runtested the main part of the code on FRV and i386, though I can't test most of the drivers. I've also done partial conversion for powerpc and MIPS - these at least compile with minimal configurations. This will affect all archs. Mostly the changes should be relatively easy. Take do_IRQ(), store the regs pointer at the beginning, saving the old one: struct pt_regs *old_regs = set_irq_regs(regs); And put the old one back at the end: set_irq_regs(old_regs); Don't pass regs through to generic_handle_irq() or __do_IRQ(). In timer_interrupt(), this sort of change will be necessary: - update_process_times(user_mode(regs)); - profile_tick(CPU_PROFILING, regs); + update_process_times(user_mode(get_irq_regs())); + profile_tick(CPU_PROFILING); I'd like to move update_process_times()'s use of get_irq_regs() into itself, except that i386, alone of the archs, uses something other than user_mode(). Some notes on the interrupt handling in the drivers: (*) input_dev() is now gone entirely. The regs pointer is no longer stored in the input_dev struct. (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does something different depending on whether it's been supplied with a regs pointer or not. (*) Various IRQ handler function pointers have been moved to type irq_handler_t. Signed-Off-By: David Howells <dhowells@redhat.com> (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 21:55:46 +08:00
int (*intr) (struct ioc3_submodule *, struct ioc3_driver_data *, unsigned int);
[PATCH] Altix: ioc3 serial support Add driver support for a 2 port PCI IOC3-based serial card on Altix boxes: This is a re-submission. On the original submission I was asked to organize the code so that the MIPS ioc3 ethernet and serial parts could be used with this driver. Stanislaw Skowronek was kind enough to provide the shim layer for this - thanks Stanislaw. This patch includes the shim layer and the Altix PCI ioc3 serial driver. The MIPS merged ioc3 ethernet and serial support is forthcoming. Signed-off-by: Patrick Gefre <pfg@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-15 05:20:40 +08:00
/* private submodule data */
void *data; /* assigned by submodule */
};
/**********************************
* Functions needed by submodules *
**********************************/
#define IOC3_W_IES 0
#define IOC3_W_IEC 1
/* registers a submodule for all existing and future IOC3 chips */
extern int ioc3_register_submodule(struct ioc3_submodule *);
/* unregisters a submodule */
extern void ioc3_unregister_submodule(struct ioc3_submodule *);
/* enables IRQs indicated by irq_mask for a specified IOC3 chip */
extern void ioc3_enable(struct ioc3_submodule *, struct ioc3_driver_data *, unsigned int);
/* ackowledges specified IRQs */
extern void ioc3_ack(struct ioc3_submodule *, struct ioc3_driver_data *, unsigned int);
/* disables IRQs indicated by irq_mask for a specified IOC3 chip */
extern void ioc3_disable(struct ioc3_submodule *, struct ioc3_driver_data *, unsigned int);
/* atomically sets GPCR bits */
extern void ioc3_gpcr_set(struct ioc3_driver_data *, unsigned int);
/* general ireg writer */
extern void ioc3_write_ireg(struct ioc3_driver_data *idd, uint32_t value, int reg);
#endif