1 #include <hal/ahci/ahci.h>
2 #include <hal/ahci/hba.h>
3 #include <hal/ahci/sata.h>
5 #include <lunaix/mm/valloc.h>
6 #include <lunaix/mm/vmm.h>
7 #include <lunaix/spike.h>
10 sata_read_error(struct hba_port* port)
12 uint32_t tfd = port->regs[HBA_RPxTFD];
13 port->device->last_result.sense_key = (tfd & 0xf000) >> 12;
14 port->device->last_result.error = (tfd & 0x0f00) >> 8;
15 port->device->last_result.status = tfd & 0x00ff;
19 sata_submit(struct hba_device* dev, struct blkio_req* io_req)
21 struct hba_port* port = dev->port;
22 struct hba_cmdh* header;
23 struct hba_cmdt* table;
25 int write = !!(io_req->flags & BLKIO_WRITE);
26 int slot = hba_prepare_cmd(port, &table, &header);
27 hba_bind_vbuf(header, table, io_req->vbuf);
29 header->options |= HBA_CMDH_WRITE * write;
31 uint16_t count = ICEIL(vbuf_size(io_req->vbuf), port->device->block_size);
32 struct sata_reg_fis* fis = (struct sata_reg_fis*)table->command_fis;
34 if ((port->device->flags & HBA_DEV_FEXTLBA)) {
37 write ? ATA_WRITE_DMA_EXT : ATA_READ_DMA_EXT,
42 fis, write ? ATA_WRITE_DMA : ATA_READ_DMA, io_req->blk_addr, count);
46 注意:在ACS-3中(甚至在ACS-4),只有在(READ/WRITE)_DMA_EXT指令中明确注明了需要将这一位置位
47 而并没有在(READ/WRITE)_DMA注明。
48 但是这在ACS-2中是有的!于是这也就导致了先前的测试中,LBA=0根本无法访问,因为此时
49 的访问模式是在CHS下,也就是说LBA=0 => Sector=0,是非法的。
50 所以,我猜测,这要么是QEMU/VirtualBox根据ACS-2来编写的AHCI模拟,
51 要么是标准出错了(毕竟是working draft)
56 struct hba_cmd_state* cmds = valloc(sizeof(struct hba_cmd_state));
57 *cmds = (struct hba_cmd_state){ .cmd_table = table, .state_ctx = io_req };
58 ahci_post(port, cmds, slot);