X-Git-Url: https://scm.lunaixsky.com/lunaix-os.git/blobdiff_plain/839da03f6ebe838d780e52190318d4c3048990f1..f05a333a0f27f401ff32cfd2e74364ee4ecc893a:/lunaix-os/hal/ahci/ahci.c

diff --git a/lunaix-os/hal/ahci/ahci.c b/lunaix-os/hal/ahci/ahci.c
index c5989fb..57bedb6 100644
--- a/lunaix-os/hal/ahci/ahci.c
+++ b/lunaix-os/hal/ahci/ahci.c
@@ -8,12 +8,14 @@
  * @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>
 
@@ -24,6 +26,9 @@ LOG_MODULE("AHCI")
 
 static struct ahci_hba hba;
 
+void
+__ahci_hba_isr(isr_param param);
+
 void
 ahci_init()
 {
@@ -41,6 +46,11 @@ 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
@@ -48,7 +58,8 @@ ahci_init()
     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];
@@ -66,7 +77,7 @@ ahci_init()
         }
 
         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]);
 
@@ -87,18 +98,30 @@ ahci_init()
         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");
+            }
+        }
     }
 }
 
@@ -107,14 +130,155 @@ char sata_ifs[][20] = { "Not detected",
                         "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