1 // (qemu-emulated) lsi53c895a boot support.
2 //
3 // Copyright (C) 2012 Red Hat Inc.
4 //
5 // Authors:
6 //  Gerd Hoffmann <kraxel@redhat.com>
7 //
8 // based on virtio-scsi.c which is written by:
9 //  Paolo Bonzini <pbonzini@redhat.com>
10 //
11 // This file may be distributed under the terms of the GNU LGPLv3 license.
12 
13 #include "biosvar.h" // GET_GLOBALFLAT
14 #include "block.h" // struct drive_s
15 #include "blockcmd.h" // scsi_drive_setup
16 #include "config.h" // CONFIG_*
17 #include "fw/paravirt.h" // runningOnQEMU
18 #include "malloc.h" // free
19 #include "output.h" // dprintf
20 #include "pcidevice.h" // foreachpci
21 #include "pci_ids.h" // PCI_DEVICE_ID_VIRTIO_BLK
22 #include "pci_regs.h" // PCI_VENDOR_ID
23 #include "stacks.h" // run_thread
24 #include "std/disk.h" // DISK_RET_SUCCESS
25 #include "string.h" // memset
26 #include "util.h" // usleep
27 
28 #define LSI_REG_DSTAT     0x0c
29 #define LSI_REG_ISTAT0    0x14
30 #define LSI_REG_DSP0      0x2c
31 #define LSI_REG_DSP1      0x2d
32 #define LSI_REG_DSP2      0x2e
33 #define LSI_REG_DSP3      0x2f
34 #define LSI_REG_SIST0     0x42
35 #define LSI_REG_SIST1     0x43
36 
37 #define LSI_ISTAT0_DIP    0x01
38 #define LSI_ISTAT0_SIP    0x02
39 #define LSI_ISTAT0_INTF   0x04
40 #define LSI_ISTAT0_CON    0x08
41 #define LSI_ISTAT0_SEM    0x10
42 #define LSI_ISTAT0_SIGP   0x20
43 #define LSI_ISTAT0_SRST   0x40
44 #define LSI_ISTAT0_ABRT   0x80
45 
46 struct lsi_lun_s {
47     struct drive_s drive;
48     struct pci_device *pci;
49     u32 iobase;
50     u8 target;
51     u8 lun;
52 };
53 
54 int
lsi_scsi_process_op(struct disk_op_s * op)55 lsi_scsi_process_op(struct disk_op_s *op)
56 {
57     if (!CONFIG_LSI_SCSI)
58         return DISK_RET_EBADTRACK;
59     struct lsi_lun_s *llun_gf =
60         container_of(op->drive_fl, struct lsi_lun_s, drive);
61     u16 target = GET_GLOBALFLAT(llun_gf->target);
62     u16 lun = GET_GLOBALFLAT(llun_gf->lun);
63     u8 cdbcmd[16];
64     int blocksize = scsi_fill_cmd(op, cdbcmd, sizeof(cdbcmd));
65     if (blocksize < 0)
66         return default_process_op(op);
67     u32 iobase = GET_GLOBALFLAT(llun_gf->iobase);
68     u32 dma = ((scsi_is_read(op) ? 0x01000000 : 0x00000000) |
69                (op->count * blocksize));
70     u8 msgout[] = {
71         0x80 | lun,                 // select lun
72         0x08,
73     };
74     u8 status = 0xff;
75     u8 msgin_tmp[2];
76     u8 msgin = 0xff;
77 
78     u32 script[] = {
79         /* select target, send scsi command */
80         0x40000000 | target << 16,  // select target
81         0x00000000,
82         0x06000001,                 // msgout
83         (u32)MAKE_FLATPTR(GET_SEG(SS), &msgout),
84         0x02000010,                 // scsi command
85         (u32)MAKE_FLATPTR(GET_SEG(SS), cdbcmd),
86 
87         /* handle disconnect */
88         0x87820000,                 // phase == msgin ?
89         0x00000018,
90         0x07000002,                 // msgin
91         (u32)MAKE_FLATPTR(GET_SEG(SS), &msgin_tmp),
92         0x50000000,                 // re-select
93         0x00000000,
94         0x07000002,                 // msgin
95         (u32)MAKE_FLATPTR(GET_SEG(SS), &msgin_tmp),
96 
97         /* dma data, get status, raise irq */
98         dma,                        // dma data
99         (u32)op->buf_fl,
100         0x03000001,                 // status
101         (u32)MAKE_FLATPTR(GET_SEG(SS), &status),
102         0x07000001,                 // msgin
103         (u32)MAKE_FLATPTR(GET_SEG(SS), &msgin),
104         0x98080000,                 // dma irq
105         0x00000000,
106     };
107     u32 dsp = (u32)MAKE_FLATPTR(GET_SEG(SS), &script);
108 
109     outb(dsp         & 0xff, iobase + LSI_REG_DSP0);
110     outb((dsp >>  8) & 0xff, iobase + LSI_REG_DSP1);
111     outb((dsp >> 16) & 0xff, iobase + LSI_REG_DSP2);
112     outb((dsp >> 24) & 0xff, iobase + LSI_REG_DSP3);
113 
114     for (;;) {
115         u8 dstat = inb(iobase + LSI_REG_DSTAT);
116         u8 sist0 = inb(iobase + LSI_REG_SIST0);
117         u8 sist1 = inb(iobase + LSI_REG_SIST1);
118         if (sist0 || sist1) {
119             goto fail;
120         }
121         if (dstat & 0x04) {
122             break;
123         }
124         usleep(5);
125     }
126 
127     if (msgin == 0 && status == 0) {
128         return DISK_RET_SUCCESS;
129     }
130 
131 fail:
132     return DISK_RET_EBADTRACK;
133 }
134 
135 static void
lsi_scsi_init_lun(struct lsi_lun_s * llun,struct pci_device * pci,u32 iobase,u8 target,u8 lun)136 lsi_scsi_init_lun(struct lsi_lun_s *llun, struct pci_device *pci, u32 iobase,
137                   u8 target, u8 lun)
138 {
139     memset(llun, 0, sizeof(*llun));
140     llun->drive.type = DTYPE_LSI_SCSI;
141     llun->drive.cntl_id = pci->bdf;
142     llun->pci = pci;
143     llun->target = target;
144     llun->lun = lun;
145     llun->iobase = iobase;
146 }
147 
148 static int
lsi_scsi_add_lun(u32 lun,struct drive_s * tmpl_drv)149 lsi_scsi_add_lun(u32 lun, struct drive_s *tmpl_drv)
150 {
151     struct lsi_lun_s *tmpl_llun =
152         container_of(tmpl_drv, struct lsi_lun_s, drive);
153     struct lsi_lun_s *llun = malloc_fseg(sizeof(*llun));
154     if (!llun) {
155         warn_noalloc();
156         return -1;
157     }
158     lsi_scsi_init_lun(llun, tmpl_llun->pci, tmpl_llun->iobase,
159                       tmpl_llun->target, lun);
160 
161     boot_lchs_find_scsi_device(llun->pci, llun->target, llun->lun,
162                                &(llun->drive.lchs));
163     char *name = znprintf(MAXDESCSIZE, "lsi %pP %d:%d",
164                           llun->pci, llun->target, llun->lun);
165     int prio = bootprio_find_scsi_device(llun->pci, llun->target, llun->lun);
166     int ret = scsi_drive_setup(&llun->drive, name, prio);
167     free(name);
168     if (ret)
169         goto fail;
170     return 0;
171 
172 fail:
173     free(llun);
174     return -1;
175 }
176 
177 static void
lsi_scsi_scan_target(struct pci_device * pci,u32 iobase,u8 target)178 lsi_scsi_scan_target(struct pci_device *pci, u32 iobase, u8 target)
179 {
180     struct lsi_lun_s llun0;
181 
182     lsi_scsi_init_lun(&llun0, pci, iobase, target, 0);
183 
184     if (scsi_rep_luns_scan(&llun0.drive, lsi_scsi_add_lun) < 0)
185         scsi_sequential_scan(&llun0.drive, 8, lsi_scsi_add_lun);
186 }
187 
188 static void
init_lsi_scsi(void * data)189 init_lsi_scsi(void *data)
190 {
191     struct pci_device *pci = data;
192     u32 iobase = pci_enable_iobar(pci, PCI_BASE_ADDRESS_0);
193     if (!iobase)
194         return;
195     pci_enable_busmaster(pci);
196 
197     dprintf(1, "found lsi53c895a at %pP, io @ %x\n", pci, iobase);
198 
199     // reset
200     outb(LSI_ISTAT0_SRST, iobase + LSI_REG_ISTAT0);
201 
202     int i;
203     for (i = 0; i < 7; i++)
204         lsi_scsi_scan_target(pci, iobase, i);
205 }
206 
207 void
lsi_scsi_setup(void)208 lsi_scsi_setup(void)
209 {
210     ASSERT32FLAT();
211     if (!CONFIG_LSI_SCSI || !runningOnQEMU())
212         return;
213 
214     dprintf(3, "init lsi53c895a\n");
215 
216     struct pci_device *pci;
217     foreachpci(pci) {
218         if (pci->vendor != PCI_VENDOR_ID_LSI_LOGIC
219             || pci->device != PCI_DEVICE_ID_LSI_53C895A)
220             continue;
221         run_thread(init_lsi_scsi, pci);
222     }
223 }
224