[LV-kern-commit] CVS: kernel-2.4/drivers/scsi vax_esp.c,NONE,1.1 vax_esp.h,NONE,1.1

[Dave A. <ai...@us...>]

Update of /cvsroot/linux-vax/kernel-2.4/drivers/scsi
In directory usw-pr-cvs1:/tmp/cvs-serv16633

Added Files:
	vax_esp.c vax_esp.h 
Log Message:
DA: import of stuff before laptop nuking


--- NEW FILE ---
/*
 * vax_esp.c: Driver for SCSI chips on VAXStation 4000/200
 *
 * based on dec_esp.c:
 * VAX support by David Airlie
 *
 * TURBOchannel changes by Harald Koerfgen
 * PMAZ-A support by David Airlie
 *
 * based on jazz_esp.c:
 * Copyright (C) 1997 Thomas Bogendoerfer (tsb...@al...)
 *
 * jazz_esp is based on David S. Miller's ESP driver and cyber_esp
 */

#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/blk.h>
#include <linux/proc_fs.h>
#include <linux/stat.h>

#include "scsi.h"
#include "hosts.h"
#include "NCR53C9x.h"
#include "vax_esp.h"

#include <asm/irq.h>
#include <asm/dma.h>

#include <asm/pgtable.h>

static int  dma_bytes_sent(struct NCR_ESP *esp, int fifo_count);
static void dma_drain(struct NCR_ESP *esp);
static int  dma_can_transfer(struct NCR_ESP *esp, Scsi_Cmnd * sp);
static void dma_dump_state(struct NCR_ESP *esp);
static void dma_init_read(struct NCR_ESP *esp, __u32 vaddress, int length);
static void dma_init_write(struct NCR_ESP *esp, __u32 vaddress, int length);
static void dma_ints_off(struct NCR_ESP *esp);
static void dma_ints_on(struct NCR_ESP *esp);
static int  dma_irq_p(struct NCR_ESP *esp);
static int  dma_ports_p(struct NCR_ESP *esp);
static void dma_setup(struct NCR_ESP *esp, __u32 addr, int count, int write);
static void dma_mmu_get_scsi_one(struct NCR_ESP *esp, Scsi_Cmnd * sp);
static void dma_mmu_get_scsi_sgl(struct NCR_ESP *esp, Scsi_Cmnd * sp);
static void dma_advance_sg(Scsi_Cmnd * sp);

#if 0
volatile unsigned char *scsi_pmaz_dma_ptrs_tc[ESP_NCMD];
unsigned char scsi_pmaz_dma_buff_used[ESP_NCMD];
#endif
unsigned char scsi_cur_buff = 1;	/* Leave space for command buffer */
__u32 esp_virt_buffer;
int scsi_current_length = 0;

volatile unsigned char cmd_buffer[16];
volatile unsigned char pmaz_cmd_buffer[16];
				/* This is where all commands are put
				 * before they are trasfered to the ESP chip
				 * via PIO.
				 */

volatile unsigned long *scsi_dma_ptr;
volatile unsigned long *scsi_next_ptr;
volatile unsigned long *scsi_scr;
volatile unsigned long *ioasic_ssr;
volatile unsigned long *scsi_sdr0;
volatile unsigned long *scsi_sdr1;

static void scsi_dma_int(int, void *, struct pt_regs *);

/***************************************************************** Detection */
int vax_esp_detect(Scsi_Host_Template * tpnt)
{
	struct NCR_ESP *esp;
	struct ConfigDev *esp_dev;
	unsigned long scsi_base;
	

	//#if INTERNAL_SCSI
	scsi_base = 0x200c0080;
	//#endif
	
	esp_dev = 0;
	esp = esp_allocate(tpnt, (void *) esp_dev);
#if 0
	scsi_dma_ptr = (unsigned long *) (system_base + IOCTL + SCSI_DMA_P);
	scsi_next_ptr = (unsigned long *) (system_base + IOCTL + SCSI_DMA_BP);
	scsi_scr = (unsigned long *) (system_base + IOCTL + SCSI_SCR);
	ioasic_ssr = (unsigned long *) (system_base + IOCTL + SSR);
	scsi_sdr0 = (unsigned long *) (system_base + IOCTL + SCSI_SDR0);
	scsi_sdr1 = (unsigned long *) (system_base + IOCTL + SCSI_SDR1);
#endif
	/* Do command transfer with programmed I/O */
	esp->do_pio_cmds = 1;
	
	/* Required functions */
	esp->dma_bytes_sent = &dma_bytes_sent;
	esp->dma_can_transfer = &dma_can_transfer;
	esp->dma_dump_state = &dma_dump_state;
	esp->dma_init_read = &dma_init_read;
	esp->dma_init_write = &dma_init_write;
	esp->dma_ints_off = &dma_ints_off;
	esp->dma_ints_on = &dma_ints_on;
	esp->dma_irq_p = &dma_irq_p;
	esp->dma_ports_p = &dma_ports_p;
	esp->dma_setup = &dma_setup;

	/* Optional functions */
	esp->dma_barrier = 0;
	esp->dma_drain = &dma_drain;
	esp->dma_invalidate = 0;
	esp->dma_irq_entry = 0;
	esp->dma_irq_exit = 0;
	esp->dma_poll = 0;
	esp->dma_reset = 0;
	esp->dma_led_off = 0;
	esp->dma_led_on = 0;
	
	/* virtual DMA functions */
	esp->dma_mmu_get_scsi_one = &dma_mmu_get_scsi_one;
	esp->dma_mmu_get_scsi_sgl = &dma_mmu_get_scsi_sgl;
		esp->dma_mmu_release_scsi_one = 0;
		esp->dma_mmu_release_scsi_sgl = 0;
	esp->dma_advance_sg = &dma_advance_sg;


	/* SCSI chip speed */
	esp->cfreq = 25000000;

	/*
	 * we don't give the address of DMA channel, but the number
	 * of DMA channel, so we can use the jazz DMA functions
	 *
	 */
	esp->dregs = 0;
	
	/* ESP register base */
	esp->eregs = (struct ESP_regs *) (scsi_base);
	
	/* Set the command buffer */
	esp->esp_command = (volatile unsigned char *) cmd_buffer;
	
	/* get virtual dma address for command buffer */
	//	esp->esp_command_dvma = (__u32) KSEG1ADDR((volatile unsigned char *) cmd_buffer);
	
	
	//	esp->irq = SCSI_INT;
	esp->irq = 255;
	
	request_irq(esp->irq, esp_intr, SA_INTERRUPT, "NCR 53C94 SCSI",
	            NULL);
	
	//	request_irq(SCSI_DMA_INT, scsi_dma_int, SA_INTERRUPT, "JUNKIO SCSI DMA",
	//		    NULL);

	esp->scsi_id = 7;
		
	/* Check for differential SCSI-bus */
	esp->diff = 0;

	esp_initialize(esp);
	
	}

#if 0
	if (TURBOCHANNEL) {
		while ((slot = search_tc_card("PMAZ_AA")) >= 0) {
			claim_tc_card(slot);
			mem_start = get_tc_base_addr(slot);

			esp_dev = 0;
			esp = esp_allocate(tpnt, (void *) esp_dev);

			esp->dregs = 0;
			esp->eregs = (struct ESP_regs *) (mem_start + DEC_SCSI_SREG);
			esp->do_pio_cmds = 1;

			/* Set the command buffer */
			esp->esp_command = (volatile unsigned char *) pmaz_cmd_buffer;

			/* get virtual dma address for command buffer */
			esp->esp_command_dvma = (__u32) KSEG0ADDR((volatile unsigned char *) pmaz_cmd_buffer);

			buffer = (volatile unsigned char *) (mem_start + DEC_SCSI_SRAM);

			scsi_pmaz_dma_ptr_tc = (volatile int *) (mem_start + DEC_SCSI_DMAREG);

			for (i = 0; i < ESP_NCMD; i++) {
				scsi_pmaz_dma_ptrs_tc[i] = (volatile unsigned char *) (buffer + ESP_TGT_DMA_SIZE * i);
			}

			scsi_pmaz_dma_buff_used[0] = 1;

			esp->cfreq = get_tc_speed();

			esp->irq = get_tc_irq_nr(slot);

			/* Required functions */
			esp->dma_bytes_sent = &dma_bytes_sent;
			esp->dma_can_transfer = &dma_can_transfer;
			esp->dma_dump_state = &dma_dump_state;
			esp->dma_init_read = &pmaz_dma_init_read;
			esp->dma_init_write = &pmaz_dma_init_write;
			esp->dma_ints_off = &pmaz_dma_ints_off;
			esp->dma_ints_on = &pmaz_dma_ints_on;
			esp->dma_irq_p = &dma_irq_p;
			esp->dma_ports_p = &dma_ports_p;
			esp->dma_setup = &pmaz_dma_setup;

			/* Optional functions */
			esp->dma_barrier = 0;
			esp->dma_drain = &pmaz_dma_drain;
			esp->dma_invalidate = 0;
			esp->dma_irq_entry = 0;
			esp->dma_irq_exit = 0;
			esp->dma_poll = 0;
			esp->dma_reset = 0;
			esp->dma_led_off = 0;
			esp->dma_led_on = 0;

			esp->dma_mmu_get_scsi_one = pmaz_dma_mmu_get_scsi_one;
			esp->dma_mmu_get_scsi_sgl = 0;
			esp->dma_mmu_release_scsi_one = 0;
			esp->dma_mmu_release_scsi_sgl = 0;
			esp->dma_advance_sg = 0;

			request_irq(esp->irq, esp_intr, SA_INTERRUPT, "PMAZ_AA", NULL);
			esp->scsi_id = 7;
			esp->diff = 0;
			esp_initialize(esp);
		}
#endif
	}


	if(nesps) {
		printk("ESP: Total of %d ESP hosts found, %d actually in use.\n", nesps, esps_in_use);
	esps_running = esps_in_use;
	return esps_in_use;
	} else
    return 0;
}

/************************************************************* DMA Functions */
static void scsi_dma_int(int irq, void *dev_id, struct pt_regs *regs)
{
	extern volatile unsigned int *isr;
	unsigned int dummy;
#if 0
	if (*isr & SCSI_PTR_LOADED) {
		/* next page */
		*scsi_next_ptr = ((*scsi_dma_ptr + PAGE_SIZE) & PAGE_MASK) << 3;
		*isr &= ~SCSI_PTR_LOADED;
	} else {
		if (*isr & SCSI_PAGOVRRUN)
			*isr &= ~SCSI_PAGOVRRUN;
		if (*isr & SCSI_DMA_MEMRDERR) {
			printk("Got unexpected SCSI DMA Interrupt! < ");
			printk("SCSI_DMA_MEMRDERR ");
		printk(">\n");
			*isr &= ~SCSI_DMA_MEMRDERR;
		}
	}

	/*
	 * This routine will only work on IOASIC machines
	 * so we can avoid an indirect function call here
	 * and flush the writeback buffer the fast way
	 */
//	dummy = *isr;
//	dummy = *isr;
#endif
}

static int dma_bytes_sent(struct NCR_ESP *esp, int fifo_count)
{
    return fifo_count;
}

static void dma_drain(struct NCR_ESP *esp)
{
	unsigned long nw = *scsi_scr;
	//	unsigned short *p = KSEG1ADDR((unsigned short *) ((*scsi_dma_ptr) >> 3));

    /*
	 * Is there something in the dma buffers left?
     */
	if (nw) {
		switch (nw) {
		case 1:
			*p = (unsigned short) *scsi_sdr0;
			break;
		case 2:
			*p++ = (unsigned short) (*scsi_sdr0);
			*p = (unsigned short) ((*scsi_sdr0) >> 16);
			break;
		case 3:
			*p++ = (unsigned short) (*scsi_sdr0);
			*p++ = (unsigned short) ((*scsi_sdr0) >> 16);
			*p = (unsigned short) (*scsi_sdr1);
			break;
		default:
			printk("Strange: %d words in dma buffer left\n", (int) nw);
			break;
		}
	}
}

static int dma_can_transfer(struct NCR_ESP *esp, Scsi_Cmnd * sp)
{
	return sp->SCp.this_residual;;
}

static void dma_dump_state(struct NCR_ESP *esp)
{
/*
    ESPLOG(("esp%d: dma -- enable <%08x> residue <%08x\n",
	    esp->esp_id, vdma_get_enable((int)esp->dregs), vdma_get_resdiue((int)esp->dregs)));
 */
}

static void dma_init_read(struct NCR_ESP *esp, __u32 vaddress, int length)
{
	extern volatile unsigned int *isr;
	unsigned int dummy;

#if 0
	if (vaddress & 3)
		panic("dec_efs.c: unable to handle partial word transfers, yet...");

	dma_cache_wback_inv((unsigned long) phys_to_virt(vaddress), length);

	*ioasic_ssr &= ~SCSI_DMA_EN;
	*scsi_scr = 0;
	*scsi_dma_ptr = vaddress << 3;

	/* prepare for next page */
	*scsi_next_ptr = ((vaddress + PAGE_SIZE) & PAGE_MASK) << 3;
	*ioasic_ssr |= (SCSI_DMA_DIR | SCSI_DMA_EN);

	/*
	 * see above
	 */
	dummy = *isr;
	dummy = *isr;
#endif
}

static void dma_init_write(struct NCR_ESP *esp, __u32 vaddress, int length)
{
#if 0
	extern volatile unsigned int *isr;
	unsigned int dummy;

	if (vaddress & 3)
		panic("dec_efs.c: unable to handle partial word transfers, yet...");

	dma_cache_wback_inv((unsigned long) phys_to_virt(vaddress), length);

	*ioasic_ssr &= ~(SCSI_DMA_DIR | SCSI_DMA_EN);
	*scsi_scr = 0;
	*scsi_dma_ptr = vaddress << 3;

	/* prepare for next page */
	*scsi_next_ptr = ((vaddress + PAGE_SIZE) & PAGE_MASK) << 3;
	*ioasic_ssr |= SCSI_DMA_EN;

	/*
	 * see above
	 */
	dummy = *isr;
	dummy = *isr;
#endif
}

static void dma_ints_off(struct NCR_ESP *esp)
{
  //	disable_irq(SCSI_DMA_INT);
}

static void dma_ints_on(struct NCR_ESP *esp)
{
  //	enable_irq(SCSI_DMA_INT);
}

static int dma_irq_p(struct NCR_ESP *esp)
{
    return (esp->eregs->esp_status & ESP_STAT_INTR);
}

static int dma_ports_p(struct NCR_ESP *esp)
{
/*
 * FIXME: what's this good for?
 */
	return 1;
}

static void dma_setup(struct NCR_ESP *esp, __u32 addr, int count, int write)
{
    /*
     * On the Sparc, DMA_ST_WRITE means "move data from device to memory"
     * so when (write) is true, it actually means READ!
     */
#if 0
	if (write) {
	dma_init_read(esp, addr, count);
    } else {
	dma_init_write(esp, addr, count);
    }
#endif
}

/*
 * These aren't used yet
 */
static void dma_mmu_get_scsi_one(struct NCR_ESP *esp, Scsi_Cmnd * sp)
{
	sp->SCp.have_data_in = PHYSADDR(sp->SCp.buffer);
	sp->SCp.ptr = (char *) ((unsigned long) sp->SCp.have_data_in);
}

static void dma_mmu_get_scsi_sgl(struct NCR_ESP *esp, Scsi_Cmnd * sp)
{
    int sz = sp->SCp.buffers_residual;
    struct mmu_sglist *sg = (struct mmu_sglist *) sp->SCp.buffer;
#if 0
    while (sz >= 0) {
		sg[sz].dvma_addr = PHYSADDR(sg[sz].addr);
	sz--;
    }
	sp->SCp.ptr = (char *) ((unsigned long) sp->SCp.buffer->dvma_address);
#endif
}

static void dma_advance_sg(Scsi_Cmnd * sp)
{
	sp->SCp.ptr = (char *) ((unsigned long) sp->SCp.buffer->dvma_address);
}

#if 0

static void pmaz_dma_drain(struct NCR_ESP *esp)
{
	memcpy((void *) (KSEG0ADDR(esp_virt_buffer)),
		(void *) scsi_pmaz_dma_ptrs_tc[scsi_cur_buff], scsi_current_length);
}

static void pmaz_dma_init_read(struct NCR_ESP *esp, __u32 vaddress, int length)
{

	if (length > ESP_TGT_DMA_SIZE)
		length = ESP_TGT_DMA_SIZE;

	*scsi_pmaz_dma_ptr_tc = TC_ESP_DMA_ADDR(scsi_pmaz_dma_ptrs_tc[scsi_cur_buff]);
	esp_virt_buffer = vaddress;
	scsi_current_length = length;
}

static void pmaz_dma_init_write(struct NCR_ESP *esp, __u32 vaddress, int length)
{
	memcpy((void *)scsi_pmaz_dma_ptrs_tc[scsi_cur_buff], KSEG0ADDR((void *) vaddress), length);

	*scsi_pmaz_dma_ptr_tc = TC_ESP_DMAR_WRITE | TC_ESP_DMA_ADDR(scsi_pmaz_dma_ptrs_tc[scsi_cur_buff]);

}

static void pmaz_dma_ints_off(struct NCR_ESP *esp)
{
}

static void pmaz_dma_ints_on(struct NCR_ESP *esp)
{
}

static void pmaz_dma_setup(struct NCR_ESP *esp, __u32 addr, int count, int write)
{
	/*
	 * On the Sparc, DMA_ST_WRITE means "move data from device to memory"
	 * so when (write) is true, it actually means READ!
	 */
	if (write) {
		pmaz_dma_init_read(esp, addr, count);
	} else {
		pmaz_dma_init_write(esp, addr, count);
	}
}

static void pmaz_dma_mmu_release_scsi_one(struct NCR_ESP *esp, Scsi_Cmnd * sp)
{
	int x;
	for (x = 1; x < 6; x++)
		if (sp->SCp.have_data_in == PHYSADDR(scsi_pmaz_dma_ptrs_tc[x]))
			scsi_pmaz_dma_buff_used[x] = 0;
}

static void pmaz_dma_mmu_get_scsi_one(struct NCR_ESP *esp, Scsi_Cmnd * sp)
{
	sp->SCp.have_data_in = (int) sp->SCp.ptr =
	    (char *) KSEG0ADDR((sp->request_buffer));
}

#endif

--- NEW FILE ---
/* vax_esp.h: Defines and structures for the VS SCSI driver.
 *
 * VS changes Copyright (C) 2001 David Airlie
 *
 * based on dec_esp.h:
 * VAXstation changes Copyright (C) 1998 Harald Koerfgen
 * and David Airlie
 *
 * based on jazz_esp.h:
 * Copyright (C) 1997 Thomas Bogendoerfer (tsb...@al...)
 */

#ifndef VAX_ESP_H
#define VAX_ESP_H

#include "NCR53C9x.h"

#define VAX_SCSI_SREG 0
#define VAX_SCSI_DMAREG 0x40000
#define VAX_SCSI_SRAM 0x80000
#define VAX_SCSI_DIAG 0xC0000

extern int vax_esp_detect(struct SHT *);
extern const char *esp_info(struct Scsi_Host *);
extern int esp_queue(Scsi_Cmnd *, void (*done)(Scsi_Cmnd *));
extern int esp_command(Scsi_Cmnd *);
extern int esp_abort(Scsi_Cmnd *);
extern int esp_reset(Scsi_Cmnd *, unsigned int);
extern int esp_proc_info(char *buffer, char **start, off_t offset, int length,
			 int hostno, int inout);

#define SCSI_VAX_ESP {                                         \
		proc_name:      "esp",				\
		proc_info:      &esp_proc_info,			\
		name:           "NCR53C94",			\
		detect:         vax_esp_detect,			\
		info:           esp_info,			\
		command:        esp_command,			\
		queuecommand:   esp_queue,			\
		abort:          esp_abort,			\
		reset:          esp_reset,			\
		can_queue:      7,				\
		this_id:        7,				\
		sg_tablesize:   SG_ALL,				\
		cmd_per_lun:    1,				\
		use_clustering: DISABLE_CLUSTERING, }

#endif /* VAX_ESP_H */