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/*
* scsi_module.c Copyright (1994, 1995) Eric Youngdale.
*
* Support for loading low-level scsi drivers using the linux kernel loadable
* module interface.
*
* To use, the host adapter should first define and initialize the variable
* driver_template (datatype Scsi_Host_Template), and then include this file.
* This should also be wrapped in a #ifdef MODULE/#endif.
*
* The low -level driver must also define a release function which will
* free any irq assignments, release any dma channels, release any I/O
* address space that might be reserved, and otherwise clean up after itself.
* The idea is that the same driver should be able to be reloaded without
* any difficulty. This makes debugging new drivers easier, as you should
* be able to load the driver, test it, unload, modify and reload.
*
* One *very* important caveat. If the driver may need to do DMA on the
* ISA bus, you must have unchecked_isa_dma set in the device template,
* even if this might be changed during the detect routine. This is
* because the shpnt structure will be allocated in a special way so that
* it will be below the appropriate DMA limit - thus if your driver uses
* the hostdata field of shpnt, and the board must be able to access this
* via DMA, the shpnt structure must be in a DMA accessible region of
* memory. This comment would be relevant for something like the buslogic
* driver where there are many boards, only some of which do DMA onto the
* ISA bus. There is no convenient way of specifying whether the host
* needs to be in a ISA DMA accessible region of memory when you call
* scsi_register.
*/
#include <linux/module.h>
#include <linux/version.h>
char kernel_version[] = UTS_RELEASE;
int init_module(void) {
driver_template.usage_count = &mod_use_count_;
scsi_register_module(MODULE_SCSI_HA, &driver_template);
return (driver_template.present == 0);
}
void cleanup_module( void) {
if (MOD_IN_USE) {
printk(KERN_INFO __FILE__ ": module is in use, remove rejected\n");
}
scsi_unregister_module(MODULE_SCSI_HA, &driver_template);
}
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