#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;
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;
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);
-
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);
}
}
void
__ahci_hba_isr(isr_param param)
{
- // TODO: hba interrupt
+ // TODO: clear the interrupt status
+ // TODO: I/O-operation scheduler should be here
kprintf(KDEBUG "HBA INTR\n");
}
kprintf("\t\t capacity: %d KiB\n",
(dev_info->max_lba * dev_info->block_size) >> 10);
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);
}
}
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 = vcalloc_dma(sizeof(struct hba_cmdt));
+ struct hba_cmdt* cmd_table = vzalloc_dma(sizeof(struct hba_cmdt));
memset(cmd_header, 0, sizeof(*cmd_header));
// 将命令表挂到命令头上
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 };
+ }
*cmdh = cmd_header;
*cmdt = cmd_table;
struct hba_cmdt* cmd_table;
struct hba_cmdh* cmd_header;
+ // mask DHR interrupt
+ port->regs[HBA_RPxIE] &= ~HBA_PxINTR_DHR;
+
// 确保端口是空闲的
wait_until(!(port->regs[HBA_RPxTFD] & (HBA_PxTFD_BSY)));
- 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 = vcalloc(sizeof(struct hba_device));
-
// 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;
scsi_parse_capacity(port->device, (uint32_t*)data_in);
done:
+ // reset interrupt status and unmask D2HR interrupt
+ port->regs[HBA_RPxIS] = -1;
+ port->regs[HBA_RPxIE] |= HBA_PxINTR_DHR;
achi_register_ops(port);
vfree_dma(data_in);
return 1;
fail:
+ port->regs[HBA_RPxIS] = -1;
+ port->regs[HBA_RPxIE] |= HBA_PxINTR_DHR;
vfree_dma(data_in);
vfree_dma(cmd_table);
git://scm.lunaixsky.com / lunaix-os.git / blobdiff