^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) ** z2ram - Amiga pseudo-driver to access 16bit-RAM in ZorroII space
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) ** as a block device, to be used as a RAM disk or swap space
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) **
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) ** Copyright (C) 1994 by Ingo Wilken (Ingo.Wilken@informatik.uni-oldenburg.de)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) **
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) ** ++Geert: support for zorro_unused_z2ram, better range checking
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) ** ++roman: translate accesses via an array
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) ** ++Milan: support for ChipRAM usage
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) ** ++yambo: converted to 2.0 kernel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) ** ++yambo: modularized and support added for 3 minor devices including:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) ** MAJOR MINOR DESCRIPTION
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) ** ----- ----- ----------------------------------------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) ** 37 0 Use Zorro II and Chip ram
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) ** 37 1 Use only Zorro II ram
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) ** 37 2 Use only Chip ram
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) ** 37 4-7 Use memory list entry 1-4 (first is 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) ** ++jskov: support for 1-4th memory list entry.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) **
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) ** Permission to use, copy, modify, and distribute this software and its
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) ** documentation for any purpose and without fee is hereby granted, provided
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) ** that the above copyright notice appear in all copies and that both that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) ** copyright notice and this permission notice appear in supporting
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) ** documentation. This software is provided "as is" without express or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) ** implied warranty.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define DEVICE_NAME "Z2RAM"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <linux/major.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <linux/vmalloc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #include <linux/blk-mq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #include <linux/bitops.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #include <linux/pgtable.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #include <asm/setup.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #include <asm/amigahw.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #include <linux/zorro.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #define Z2MINOR_COMBINED (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #define Z2MINOR_Z2ONLY (1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #define Z2MINOR_CHIPONLY (2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #define Z2MINOR_MEMLIST1 (4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #define Z2MINOR_MEMLIST2 (5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #define Z2MINOR_MEMLIST3 (6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #define Z2MINOR_MEMLIST4 (7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #define Z2MINOR_COUNT (8) /* Move this down when adding a new minor */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #define Z2RAM_CHUNK1024 ( Z2RAM_CHUNKSIZE >> 10 )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) static DEFINE_MUTEX(z2ram_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) static u_long *z2ram_map = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) static u_long z2ram_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) static int z2_count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) static int chip_count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) static int list_count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) static int current_device = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) static DEFINE_SPINLOCK(z2ram_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) static struct gendisk *z2ram_gendisk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) static blk_status_t z2_queue_rq(struct blk_mq_hw_ctx *hctx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) const struct blk_mq_queue_data *bd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) struct request *req = bd->rq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) unsigned long start = blk_rq_pos(req) << 9;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) unsigned long len = blk_rq_cur_bytes(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) blk_mq_start_request(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) if (start + len > z2ram_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) pr_err(DEVICE_NAME ": bad access: block=%llu, "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) "count=%u\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) (unsigned long long)blk_rq_pos(req),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) blk_rq_cur_sectors(req));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) return BLK_STS_IOERR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) spin_lock_irq(&z2ram_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) while (len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) unsigned long addr = start & Z2RAM_CHUNKMASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) unsigned long size = Z2RAM_CHUNKSIZE - addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) void *buffer = bio_data(req->bio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) if (len < size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) size = len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) addr += z2ram_map[ start >> Z2RAM_CHUNKSHIFT ];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) if (rq_data_dir(req) == READ)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) memcpy(buffer, (char *)addr, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) memcpy((char *)addr, buffer, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) start += size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) len -= size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) spin_unlock_irq(&z2ram_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) blk_mq_end_request(req, BLK_STS_OK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) return BLK_STS_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) get_z2ram( void )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) for ( i = 0; i < Z2RAM_SIZE / Z2RAM_CHUNKSIZE; i++ )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) if ( test_bit( i, zorro_unused_z2ram ) )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) z2_count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) z2ram_map[z2ram_size++] = (unsigned long)ZTWO_VADDR(Z2RAM_START) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) (i << Z2RAM_CHUNKSHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) clear_bit( i, zorro_unused_z2ram );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) get_chipram( void )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) while ( amiga_chip_avail() > ( Z2RAM_CHUNKSIZE * 4 ) )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) chip_count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) z2ram_map[ z2ram_size ] =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) (u_long)amiga_chip_alloc( Z2RAM_CHUNKSIZE, "z2ram" );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) if ( z2ram_map[ z2ram_size ] == 0 )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) z2ram_size++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) static int z2_open(struct block_device *bdev, fmode_t mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) int device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) int max_z2_map = ( Z2RAM_SIZE / Z2RAM_CHUNKSIZE ) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) sizeof( z2ram_map[0] );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) int max_chip_map = ( amiga_chip_size / Z2RAM_CHUNKSIZE ) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) sizeof( z2ram_map[0] );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) int rc = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) device = MINOR(bdev->bd_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) mutex_lock(&z2ram_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) if ( current_device != -1 && current_device != device )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) rc = -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) goto err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) if ( current_device == -1 )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) z2_count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) chip_count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) list_count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) z2ram_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) /* Use a specific list entry. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) if (device >= Z2MINOR_MEMLIST1 && device <= Z2MINOR_MEMLIST4) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) int index = device - Z2MINOR_MEMLIST1 + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) unsigned long size, paddr, vaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) if (index >= m68k_realnum_memory) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) printk( KERN_ERR DEVICE_NAME
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) ": no such entry in z2ram_map\n" );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) goto err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) paddr = m68k_memory[index].addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) size = m68k_memory[index].size & ~(Z2RAM_CHUNKSIZE-1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) #ifdef __powerpc__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) /* FIXME: ioremap doesn't build correct memory tables. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) vfree(vmalloc (size));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) vaddr = (unsigned long)ioremap_wt(paddr, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) vaddr = (unsigned long)z_remap_nocache_nonser(paddr, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) z2ram_map =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) kmalloc_array(size / Z2RAM_CHUNKSIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) sizeof(z2ram_map[0]),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) if ( z2ram_map == NULL )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) printk( KERN_ERR DEVICE_NAME
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) ": cannot get mem for z2ram_map\n" );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) goto err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) while (size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) z2ram_map[ z2ram_size++ ] = vaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) size -= Z2RAM_CHUNKSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) vaddr += Z2RAM_CHUNKSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) list_count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) if ( z2ram_size != 0 )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) printk( KERN_INFO DEVICE_NAME
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) ": using %iK List Entry %d Memory\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) list_count * Z2RAM_CHUNK1024, index );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) switch ( device )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) case Z2MINOR_COMBINED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) z2ram_map = kmalloc( max_z2_map + max_chip_map, GFP_KERNEL );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) if ( z2ram_map == NULL )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) printk( KERN_ERR DEVICE_NAME
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) ": cannot get mem for z2ram_map\n" );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) goto err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) get_z2ram();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) get_chipram();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) if ( z2ram_size != 0 )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) printk( KERN_INFO DEVICE_NAME
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) ": using %iK Zorro II RAM and %iK Chip RAM (Total %dK)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) z2_count * Z2RAM_CHUNK1024,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) chip_count * Z2RAM_CHUNK1024,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) ( z2_count + chip_count ) * Z2RAM_CHUNK1024 );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) case Z2MINOR_Z2ONLY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) z2ram_map = kmalloc( max_z2_map, GFP_KERNEL );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) if ( z2ram_map == NULL )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) printk( KERN_ERR DEVICE_NAME
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) ": cannot get mem for z2ram_map\n" );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) goto err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) get_z2ram();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) if ( z2ram_size != 0 )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) printk( KERN_INFO DEVICE_NAME
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) ": using %iK of Zorro II RAM\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) z2_count * Z2RAM_CHUNK1024 );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) case Z2MINOR_CHIPONLY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) z2ram_map = kmalloc( max_chip_map, GFP_KERNEL );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) if ( z2ram_map == NULL )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) printk( KERN_ERR DEVICE_NAME
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) ": cannot get mem for z2ram_map\n" );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) goto err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) get_chipram();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) if ( z2ram_size != 0 )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) printk( KERN_INFO DEVICE_NAME
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) ": using %iK Chip RAM\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) chip_count * Z2RAM_CHUNK1024 );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) rc = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) goto err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) if ( z2ram_size == 0 )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) printk( KERN_NOTICE DEVICE_NAME
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) ": no unused ZII/Chip RAM found\n" );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) goto err_out_kfree;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) current_device = device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) z2ram_size <<= Z2RAM_CHUNKSHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) set_capacity(z2ram_gendisk, z2ram_size >> 9);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) mutex_unlock(&z2ram_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) err_out_kfree:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) kfree(z2ram_map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) err_out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) mutex_unlock(&z2ram_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) z2_release(struct gendisk *disk, fmode_t mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) mutex_lock(&z2ram_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) if ( current_device == -1 ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) mutex_unlock(&z2ram_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) mutex_unlock(&z2ram_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) * FIXME: unmap memory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) static const struct block_device_operations z2_fops =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) .open = z2_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) .release = z2_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) static struct kobject *z2_find(dev_t dev, int *part, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) *part = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) return get_disk_and_module(z2ram_gendisk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) static struct request_queue *z2_queue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) static struct blk_mq_tag_set tag_set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) static const struct blk_mq_ops z2_mq_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) .queue_rq = z2_queue_rq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) static int __init
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) z2_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) if (!MACH_IS_AMIGA)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) ret = -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) if (register_blkdev(Z2RAM_MAJOR, DEVICE_NAME))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) z2ram_gendisk = alloc_disk(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) if (!z2ram_gendisk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) goto out_disk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) z2_queue = blk_mq_init_sq_queue(&tag_set, &z2_mq_ops, 16,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) BLK_MQ_F_SHOULD_MERGE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) if (IS_ERR(z2_queue)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) ret = PTR_ERR(z2_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) z2_queue = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) goto out_queue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) z2ram_gendisk->major = Z2RAM_MAJOR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) z2ram_gendisk->first_minor = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) z2ram_gendisk->fops = &z2_fops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) sprintf(z2ram_gendisk->disk_name, "z2ram");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) z2ram_gendisk->queue = z2_queue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) add_disk(z2ram_gendisk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) blk_register_region(MKDEV(Z2RAM_MAJOR, 0), Z2MINOR_COUNT, THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) z2_find, NULL, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) out_queue:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) put_disk(z2ram_gendisk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) out_disk:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) unregister_blkdev(Z2RAM_MAJOR, DEVICE_NAME);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) static void __exit z2_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) int i, j;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) blk_unregister_region(MKDEV(Z2RAM_MAJOR, 0), Z2MINOR_COUNT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) unregister_blkdev(Z2RAM_MAJOR, DEVICE_NAME);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) del_gendisk(z2ram_gendisk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) put_disk(z2ram_gendisk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) blk_cleanup_queue(z2_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) blk_mq_free_tag_set(&tag_set);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) if ( current_device != -1 )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) i = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) for ( j = 0 ; j < z2_count; j++ )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) set_bit( i++, zorro_unused_z2ram );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) for ( j = 0 ; j < chip_count; j++ )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) if ( z2ram_map[ i ] )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) amiga_chip_free( (void *) z2ram_map[ i++ ] );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) if ( z2ram_map != NULL )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) kfree( z2ram_map );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) module_init(z2_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) module_exit(z2_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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