* @copyright Copyright (c) 2022
*
*/
-#include <hal/ahci.h>
+#include <hal/ahci/ahci.h>
+#include <hal/ahci/utils.h>
#include <hal/pci.h>
#include <klibc/string.h>
-#include <lunaix/mm/kalloc.h>
#include <lunaix/mm/mmio.h>
#include <lunaix/mm/pmm.h>
+#include <lunaix/mm/valloc.h>
+#include <lunaix/mm/vmm.h>
#include <lunaix/spike.h>
#include <lunaix/syslog.h>
static struct ahci_hba hba;
+void
+__ahci_hba_isr(isr_param param);
+
void
ahci_init()
{
pci_write_cspace(ahci_dev->cspace_base, PCI_REG_STATUS_CMD, cmd);
+ pci_setup_msi(ahci_dev, AHCI_HBA_IV);
+ intr_subscribe(AHCI_HBA_IV, __ahci_hba_isr);
+
+ memset(&hba, 0, sizeof(hba));
+
hba.base = (hba_reg_t*)ioremap(PCI_BAR_ADDR_MM(bar6), size);
// 重置HBA
wait_until(!(hba.base[HBA_RGHC] & HBA_RGHC_RESET));
// 启用AHCI工作模式，启用中断
- hba.base[HBA_RGHC] |= (HBA_RGHC_ACHI_ENABLE | HBA_RGHC_INTR_ENABLE);
+ hba.base[HBA_RGHC] |= HBA_RGHC_ACHI_ENABLE;
+ hba.base[HBA_RGHC] |= HBA_RGHC_INTR_ENABLE;
// As per section 3.1.1, this is 0 based value.
hba_reg_t cap = hba.base[HBA_RCAP];
}
struct ahci_port* port =
- (struct ahci_port*)lxmalloc(sizeof(struct ahci_port));
+ (struct ahci_port*)valloc(sizeof(struct ahci_port));
hba_reg_t* port_regs =
(hba_reg_t*)(&hba.base[HBA_RPBASE + i * HBA_RPSIZE]);
port_regs[HBA_RPxCLB] = clb_pa + clbp * HBA_CLB_SIZE;
port_regs[HBA_RPxFB] = fis_pa + fisp * HBA_FIS_SIZE;
- *port =
- (struct ahci_port){ .regs = port_regs,
- .ssts = port_regs[HBA_RPxSSTS],
- .cmdlstv = clb_pg_addr + clbp * HBA_CLB_SIZE,
- .fisv = fis_pg_addr + fisp * HBA_FIS_SIZE };
+ *port = (struct ahci_port){ .regs = port_regs,
+ .ssts = port_regs[HBA_RPxSSTS],
+ .cmdlst = clb_pg_addr + clbp * HBA_CLB_SIZE,
+ .fis = fis_pg_addr + fisp * HBA_FIS_SIZE };
/* 初始化端口，并置于就绪状态 */
port_regs[HBA_RPxCI] = 0;
- port_regs[HBA_RPxIE] |= (HBA_PxINTR_DMA | HBA_PxINTR_D2HR);
- port_regs[HBA_RPxCMD] |= (HBA_PxCMD_FRE | HBA_PxCMD_ST);
+
+ // 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 (!ahci_identify_device(port)) {
+ kprintf(KERROR "fail to probe device info");
+ }
+ }
}
}
"SATA II (3.0Gbps)",
"SATA III (6.0Gbps)" };
+void
+__ahci_hba_isr(isr_param param)
+{
+ // TODO: hba interrupt
+ kprintf(KDEBUG "HBA INTR\n");
+}
+
void
ahci_list_device()
{
- kprintf(KINFO "Version: %x; Ports: %d\n", hba.version, hba.ports_num);
+ kprintf(KINFO "Version: %x; Ports: %d; Slot: %d\n",
+ hba.version,
+ hba.ports_num,
+ hba.cmd_slots);
+ struct ahci_port* port;
for (size_t i = 0; i < 32; i++) {
- struct ahci_port* port = hba.ports[i];
- if (!port)
+ port = hba.ports[i];
+
+ // 愚蠢的gcc似乎认为 struct ahci_port* 不可能为空
+ // 所以将这个非常关键的if给优化掉了。
+ // 这里将指针强制转换为整数，欺骗gcc :)
+ if ((uintptr_t)port == 0) {
continue;
- kprintf("\t Port %d: %s\n", i, &sata_ifs[HBA_RPxSSTS_IF(port->ssts)]);
+ }
+
+ int device_state = HBA_RPxSSTS_IF(port->ssts);
+
+ kprintf("\t Port %d: %s (%x)\n",
+ i,
+ &sata_ifs[device_state],
+ port->regs[HBA_RPxSIG]);
+
+ struct ahci_device_info* dev_info = port->device_info;
+ if (!device_state || !dev_info) {
+ continue;
+ }
+
+ kprintf("\t\t capacity: %d KiB\n",
+ (dev_info->max_lba * dev_info->sector_size) >> 10);
+ kprintf("\t\t sector size: %dB\n", dev_info->sector_size);
+ kprintf("\t\t model: %s\n", &dev_info->model);
+ kprintf("\t\t serial: %s\n", &dev_info->serial_num);
}
-}
\ No newline at end of file
+}
+
+int
+achi_alloc_slot(struct ahci_port* port)
+{
+ hba_reg_t pxsact = port->regs[HBA_RPxSACT];
+ hba_reg_t pxci = port->regs[HBA_RPxCI];
+ hba_reg_t free_bmp = pxsact | pxci;
+ uint32_t i = 0;
+ for (; i <= hba.cmd_slots && (free_bmp & 0x1); i++, free_bmp >>= 1)
+ ;
+ return i | -(i > hba.cmd_slots);
+}
+
+void
+__ahci_create_fis(struct sata_reg_fis* cmd_fis,
+ uint8_t command,
+ uint32_t lba_lo,
+ uint32_t lba_hi,
+ uint16_t sector_count)
+{
+ cmd_fis->head.type = SATA_REG_FIS_H2D;
+ cmd_fis->head.options = SATA_REG_FIS_COMMAND;
+ 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->lba32 = SATA_LBA_COMPONENT(lba_hi, 0);
+ cmd_fis->lba40 = SATA_LBA_COMPONENT(lba_hi, 8);
+
+ cmd_fis->count = sector_count;
+}
+
+int
+ahci_identify_device(struct ahci_port* port)
+{
+ int slot = achi_alloc_slot(port);
+ assert_msg(slot >= 0, "No free slot");
+
+ // 清空任何待响应的中断
+ port->regs[HBA_RPxIS] = 0;
+
+ /* 发送ATA命令，参考：SATA AHCI Spec Rev.1.3.1, section 5.5 */
+
+ // 构建命令头（Command Header）和命令表（Command Table）
+ struct ahci_hba_cmdh* cmd_header = &port->cmdlst[slot];
+ struct ahci_hba_cmdt* cmd_table = valloc_dma(sizeof(struct ahci_hba_cmdt));
+
+ memset(cmd_header, 0, sizeof(*cmd_header));
+ memset(cmd_table, 0, sizeof(*cmd_table));
+
+ // 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 ahci_hba_prdte){ .data_base = vmm_v2p(data_in),
+ .byte_count = 511 }; // byte_count是从0开始算的
+
+ // 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->regs[HBA_RPxSIG] == HBA_DEV_SIG_ATA) {
+ // ATA 一般为硬盘
+ __ahci_create_fis(cmd_fis, ATA_IDENTIFY_DEVICE, 0, 0, 0);
+ } else {
+ // ATAPI 一般为光驱，软驱，或者磁带机
+ __ahci_create_fis(cmd_fis, ATA_IDENTIFY_PAKCET_DEVICE, 0, 0, 0);
+ }
+
+ // 将命令表挂到命令头上
+ cmd_header->cmd_table_base = vmm_v2p(cmd_table);
+ cmd_header->prdt_len = 1;
+ cmd_header->options |=
+ HBA_CMDH_FIS_LEN(sizeof(*cmd_fis)) | HBA_CMDH_CLR_BUSY;
+
+ // PxCI寄存器置位，告诉HBA这儿有个数据需要发送到SATA端口
+ port->regs[HBA_RPxCI] = (1 << slot);
+
+ wait_until(!(port->regs[HBA_RPxCI] & (1 << slot)));
+
+ /*
+ 等待数据到达内存
+ 解析IDENTIFY DEVICE传回来的数据。
+ 参考：
+ * ATA/ATAPI Command Set - 3 (ACS-3), Section 7.12.7
+
+ 注意：ATAPI无法通过IDENTIFY PACKET DEVICE 获取容量信息。
+ 这需要另外使用特殊的SCSI命令中的READ CAPACITY(16)
+ 来获取，这种命令需要使用ATA的PACKET命令发出。
+ 参考：
+ * ATA/ATAPI Command Set - 3 (ACS-3), Section 7.18
+ * SATA AHCI HBA Spec, Section 5.3.7
+ * SCSI Command Reference Manual, Section 3.26
+ */
+ port->device_info = valloc(sizeof(struct ahci_device_info));
+ ahci_parse_dev_info(port->device_info, data_in);
+
+ vfree_dma(data_in);
+ vfree_dma(cmd_table);
+
+ return 1;
+}
+
+// TODO: Support ATAPI Device.
\ No newline at end of file
git://scm.lunaixsky.com / lunaix-os.git / blobdiff