#include <hal/pci.h>
#include <klibc/string.h>
+#include <lunaix/block.h>
#include <lunaix/mm/mmio.h>
#include <lunaix/mm/pmm.h>
#include <lunaix/mm/valloc.h>
#define HBA_FIS_SIZE 256
#define HBA_CLB_SIZE 1024
+// #define DO_HBA_FULL_RESET
+
LOG_MODULE("AHCI")
static struct ahci_hba hba;
int
ahci_init_device(struct hba_port* port);
+void
+achi_register_ops(struct hba_port* port);
+
+unsigned int
+ahci_get_port_usage()
+{
+ return hba.ports_bmp;
+}
+
+struct hba_port*
+ahci_get_port(unsigned int index)
+{
+ if (index >= 32) {
+ return 0;
+ }
+ return hba.ports[index];
+}
+
+void
+__hba_reset_port(hba_reg_t* port_reg)
+{
+ // 根据：SATA-AHCI spec section 10.4.2 描述的端口重置流程
+ port_reg[HBA_RPxCMD] &= ~HBA_PxCMD_ST;
+ port_reg[HBA_RPxCMD] &= ~HBA_PxCMD_FRE;
+ int cnt = wait_until_expire(!(port_reg[HBA_RPxCMD] & HBA_PxCMD_CR), 500000);
+ if (cnt) {
+ return;
+ }
+ // 如果port未响应，则继续执行重置
+ port_reg[HBA_RPxSCTL] = (port_reg[HBA_RPxSCTL] & ~0xf) | 1;
+ io_delay(100000); //等待至少一毫秒，差不多就行了
+ port_reg[HBA_RPxSCTL] &= ~0xf;
+}
+
void
ahci_init()
{
hba.base = (hba_reg_t*)ioremap(PCI_BAR_ADDR_MM(bar6), size);
+#ifdef DO_HBA_FULL_RESET
// 重置HBA
hba.base[HBA_RGHC] |= HBA_RGHC_RESET;
wait_until(!(hba.base[HBA_RGHC] & HBA_RGHC_RESET));
+#endif
// 启用AHCI工作模式，启用中断
hba.base[HBA_RGHC] |= HBA_RGHC_ACHI_ENABLE;
// As per section 3.1.1, this is 0 based value.
hba_reg_t cap = hba.base[HBA_RCAP];
+ hba_reg_t pmap = hba.base[HBA_RPI];
+
hba.ports_num = (cap & 0x1f) + 1; // CAP.PI
hba.cmd_slots = (cap >> 8) & 0x1f; // CAP.NCS
hba.version = hba.base[HBA_RVER];
+ hba.ports_bmp = pmap;
/* ------ HBA端口配置 ------ */
- hba_reg_t pmap = hba.base[HBA_RPI];
uintptr_t clb_pg_addr, fis_pg_addr, clb_pa, fis_pa;
for (size_t i = 0, fisp = 0, clbp = 0; i < 32;
i++, pmap >>= 1, fisp = (fisp + 1) % 16, clbp = (clbp + 1) % 4) {
hba_reg_t* port_regs =
(hba_reg_t*)(&hba.base[HBA_RPBASE + i * HBA_RPSIZE]);
+#ifndef DO_HBA_FULL_RESET
+ __hba_reset_port(port_regs);
+#endif
+
if (!clbp) {
// 每页最多4个命令队列
clb_pa = pmm_alloc_page(KERNEL_PID, PP_FGLOCKED);
// 需要通过全部置位去清空这些寄存器（相当的奇怪……）
port_regs[HBA_RPxSERR] = -1;
- port_regs[HBA_RPxIE] |= (HBA_PxINTR_DMA);
- port_regs[HBA_RPxIE] |= (HBA_PxINTR_D2HR);
+ port_regs[HBA_RPxIE] |= (HBA_PxINTR_DPS);
hba.ports[i] = port;
- if (HBA_RPxSSTS_IF(port->ssts)) {
- wait_until(!(port_regs[HBA_RPxCMD] & HBA_PxCMD_CR));
- port_regs[HBA_RPxCMD] |= HBA_PxCMD_FRE;
- port_regs[HBA_RPxCMD] |= HBA_PxCMD_ST;
+ if (!HBA_RPxSSTS_IF(port->ssts)) {
+ continue;
+ }
+
+ wait_until(!(port_regs[HBA_RPxCMD] & HBA_PxCMD_CR));
+ port_regs[HBA_RPxCMD] |= HBA_PxCMD_FRE;
+ port_regs[HBA_RPxCMD] |= HBA_PxCMD_ST;
- if (!ahci_init_device(port)) {
- kprintf(KERROR "fail to init device");
- }
+ if (!ahci_init_device(port)) {
+ kprintf(KERROR "fail to init device");
}
+
+ block_mount_disk(port->device);
}
}
kprintf("\t Port %d: %s (%x)\n",
i,
&sata_ifs[device_state],
- port->regs[HBA_RPxSIG]);
+ port->device->flags);
struct hba_device* dev_info = port->device;
if (!device_state || !dev_info) {
}
kprintf("\t\t capacity: %d KiB\n",
(dev_info->max_lba * dev_info->block_size) >> 10);
- kprintf("\t\t sector size: %dB\n", dev_info->block_size);
+ kprintf("\t\t block size: %dB\n", dev_info->block_size);
+ kprintf("\t\t block/sector: %d\n", dev_info->block_per_sec);
+ kprintf("\t\t alignment: %dB\n", dev_info->alignment_offset);
+ kprintf("\t\t capabilities: %x\n", dev_info->capabilities);
kprintf("\t\t model: %s\n", &dev_info->model);
kprintf("\t\t serial: %s\n", &dev_info->serial_num);
}
void
sata_create_fis(struct sata_reg_fis* cmd_fis,
uint8_t command,
- uint32_t lba_lo,
- uint32_t lba_hi,
+ uint64_t lba,
uint16_t sector_count)
{
cmd_fis->head.type = SATA_REG_FIS_H2D;
cmd_fis->head.status_cmd = command;
cmd_fis->dev = 0;
- cmd_fis->lba0 = SATA_LBA_COMPONENT(lba_lo, 0);
- cmd_fis->lba8 = SATA_LBA_COMPONENT(lba_lo, 8);
- cmd_fis->lba16 = SATA_LBA_COMPONENT(lba_lo, 16);
- cmd_fis->lba24 = SATA_LBA_COMPONENT(lba_lo, 24);
+ cmd_fis->lba0 = SATA_LBA_COMPONENT(lba, 0);
+ cmd_fis->lba8 = SATA_LBA_COMPONENT(lba, 8);
+ cmd_fis->lba16 = SATA_LBA_COMPONENT(lba, 16);
+ cmd_fis->lba24 = SATA_LBA_COMPONENT(lba, 24);
- cmd_fis->lba32 = SATA_LBA_COMPONENT(lba_hi, 0);
- cmd_fis->lba40 = SATA_LBA_COMPONENT(lba_hi, 8);
+ cmd_fis->lba32 = SATA_LBA_COMPONENT(lba, 32);
+ cmd_fis->lba40 = SATA_LBA_COMPONENT(lba, 40);
cmd_fis->count = sector_count;
}
int
-hba_alloc_slot(struct hba_port* port,
- struct hba_cmdt** cmdt,
- struct hba_cmdh** cmdh,
- uint16_t header_options)
+hba_prepare_cmd(struct hba_port* port,
+ struct hba_cmdt** cmdt,
+ struct hba_cmdh** cmdh,
+ void* buffer,
+ unsigned int size)
{
int slot = __get_free_slot(port);
assert_msg(slot >= 0, "HBA: No free slot");
+ assert_msg(size <= 0x400000, "HBA: buffer too big");
// 构建命令头（Command Header）和命令表（Command Table）
struct hba_cmdh* cmd_header = &port->cmdlst[slot];
- struct hba_cmdt* cmd_table = valloc_dma(sizeof(struct hba_cmdt));
+ struct hba_cmdt* cmd_table = vzalloc_dma(sizeof(struct hba_cmdt));
memset(cmd_header, 0, sizeof(*cmd_header));
- memset(cmd_table, 0, sizeof(*cmd_table));
// 将命令表挂到命令头上
- cmd_header->prdt_len = 1;
cmd_header->cmd_table_base = vmm_v2p(cmd_table);
- cmd_header->options = HBA_CMDH_FIS_LEN(sizeof(struct sata_reg_fis)) |
- HBA_CMDH_CLR_BUSY | (header_options & ~0x1f);
+ cmd_header->options =
+ HBA_CMDH_FIS_LEN(sizeof(struct sata_reg_fis)) | HBA_CMDH_CLR_BUSY;
+
+ if (buffer) {
+ cmd_header->prdt_len = 1;
+ cmd_table->entries[0] =
+ (struct hba_prdte){ .data_base = vmm_v2p(buffer),
+ .byte_count = (size - 1) | (0x80000000) };
+ }
*cmdh = cmd_header;
*cmdt = cmd_table;
struct hba_cmdt* cmd_table;
struct hba_cmdh* cmd_header;
- int slot = hba_alloc_slot(port, &cmd_table, &cmd_header, 0);
-
- // 清空任何待响应的中断
- port->regs[HBA_RPxIS] = 0;
- port->device = valloc(sizeof(struct hba_device));
- port->device->signature = port->regs[HBA_RPxSIG];
+ // 确保端口是空闲的
+ wait_until(!(port->regs[HBA_RPxTFD] & (HBA_PxTFD_BSY)));
// 预备DMA接收缓存，用于存放HBA传回的数据
uint16_t* data_in = (uint16_t*)valloc_dma(512);
- cmd_table->entries[0] =
- (struct hba_prdte){ .data_base = vmm_v2p(data_in),
- .byte_count = 511 }; // byte_count是从0开始算的
- cmd_header->prdt_len = 1;
+ int slot = hba_prepare_cmd(port, &cmd_table, &cmd_header, data_in, 512);
+
+ // 清空任何待响应的中断
+ port->regs[HBA_RPxIS] = 0;
+ port->device = vzalloc(sizeof(struct hba_device));
+ port->device->port = port;
// 在命令表中构建命令FIS
struct sata_reg_fis* cmd_fis = (struct sata_reg_fis*)cmd_table->command_fis;
// 根据设备类型使用合适的命令
- if (port->device->signature == HBA_DEV_SIG_ATA) {
+ if (port->regs[HBA_RPxSIG] == HBA_DEV_SIG_ATA) {
// ATA 一般为硬盘
- sata_create_fis(cmd_fis, ATA_IDENTIFY_DEVICE, 0, 0, 0);
+ sata_create_fis(cmd_fis, ATA_IDENTIFY_DEVICE, 0, 0);
} else {
// ATAPI 一般为光驱，软驱，或者磁带机
- sata_create_fis(cmd_fis, ATA_IDENTIFY_PAKCET_DEVICE, 0, 0, 0);
+ port->device->flags |= HBA_DEV_FATAPI;
+ sata_create_fis(cmd_fis, ATA_IDENTIFY_PAKCET_DEVICE, 0, 0);
}
// PxCI寄存器置位，告诉HBA这儿有个数据需要发送到SATA端口
wait_until(!(port->regs[HBA_RPxCI] & (1 << slot)));
+ if ((port->regs[HBA_RPxTFD] & HBA_PxTFD_ERR)) {
+ // 有错误
+ sata_read_error(port);
+ goto fail;
+ }
+
/*
等待数据到达内存
解析IDENTIFY DEVICE传回来的数据。
*/
ahci_parse_dev_info(port->device, data_in);
- if (port->device->signature == HBA_DEV_SIG_ATA) {
+ if (!(port->device->flags & HBA_DEV_FATAPI)) {
goto done;
}
* SATA AHCI HBA Spec, Section 5.3.7
* SCSI Command Reference Manual, Section 3.26
*/
- sata_create_fis(cmd_fis, ATA_PACKET, 512 << 8, 0, 0);
struct scsi_cdb16* cdb16 = (struct scsi_cdb16*)cmd_table->atapi_cmd;
- scsi_create_packet16(cdb16, SCSI_READ_CAPACITY_16, 0, 0, 512);
+
+ sata_create_fis(cmd_fis, ATA_PACKET, 512 << 8, 0);
+ scsi_create_packet16(cdb16, SCSI_READ_CAPACITY_16, 0, 512);
+
cdb16->misc1 = 0x10; // service action
cmd_header->transferred_size = 0;
cmd_header->options |= HBA_CMDH_ATAPI;
port->regs[HBA_RPxCI] = (1 << slot);
wait_until(!(port->regs[HBA_RPxCI] & (1 << slot)));
+ if ((port->regs[HBA_RPxTFD] & HBA_PxTFD_ERR)) {
+ // 有错误
+ sata_read_error(port);
+ goto fail;
+ }
+
scsi_parse_capacity(port->device, (uint32_t*)data_in);
done:
+ achi_register_ops(port);
+
vfree_dma(data_in);
vfree_dma(cmd_table);
return 1;
+
+fail:
+ vfree_dma(data_in);
+ vfree_dma(cmd_table);
+
+ return 0;
+}
+
+int
+ahci_identify_device(struct hba_port* port)
+{
+ // 用于重新识别设备（比如在热插拔的情况下）
+ vfree(port->device);
+ return ahci_init_device(port);
}
-// TODO: Support ATAPI Device.
\ No newline at end of file
+void
+achi_register_ops(struct hba_port* port)
+{
+ port->device->ops.identify = ahci_identify_device;
+ if (!(port->device->flags & HBA_DEV_FATAPI)) {
+ port->device->ops.read_buffer = sata_read_buffer;
+ port->device->ops.write_buffer = sata_write_buffer;
+ } else {
+ port->device->ops.read_buffer = scsi_read_buffer;
+ port->device->ops.write_buffer = scsi_write_buffer;
+ }
+}
\ No newline at end of file
git://scm.lunaixsky.com / lunaix-os.git / blobdiff