Merge branch 'master' into vfs-dev

[lunaix-os.git] / lunaix-os / hal / ahci / ahci.c

diff --git a/lunaix-os/hal/ahci/ahci.c b/lunaix-os/hal/ahci/ahci.c
index 31e9725a812d7fcc9c2ab6699aa76d7a5a03b1ca..0551ee547fe9283bf4c063895bc61db89806d4fd 100644 (file)
--- a/lunaix-os/hal/ahci/ahci.c
+++ b/lunaix-os/hal/ahci/ahci.c
@@ -16,6 +16,7 @@
 
 #include <hal/pci.h>
 #include <klibc/string.h>
 
 #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>
 #include <lunaix/mm/mmio.h>
 #include <lunaix/mm/pmm.h>
 #include <lunaix/mm/valloc.h>


@@ -26,6 +27,8 @@
 #define HBA_FIS_SIZE 256
 #define HBA_CLB_SIZE 1024
 
 #define HBA_FIS_SIZE 256
 #define HBA_CLB_SIZE 1024
 

+// #define DO_HBA_FULL_RESET
+

 LOG_MODULE("AHCI")
 
 static struct ahci_hba hba;
 LOG_MODULE("AHCI")
 
 static struct ahci_hba hba;


@@ -54,6 +57,22 @@ ahci_get_port(unsigned int index)
     return hba.ports[index];
 }
 
     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()
 {
 void
 ahci_init()
 {


@@ -78,9 +97,11 @@ ahci_init()
 
     hba.base = (hba_reg_t*)ioremap(PCI_BAR_ADDR_MM(bar6), size);
 
 
     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));
     // 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;
 
     // 启用AHCI工作模式，启用中断
     hba.base[HBA_RGHC] |= HBA_RGHC_ACHI_ENABLE;


@@ -108,6 +129,10 @@ ahci_init()
         hba_reg_t* port_regs =
           (hba_reg_t*)(&hba.base[HBA_RPBASE + i * HBA_RPSIZE]);
 
         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);
         if (!clbp) {
             // 每页最多4个命令队列
             clb_pa = pmm_alloc_page(KERNEL_PID, PP_FGLOCKED);


@@ -136,20 +161,21 @@ ahci_init()
         // 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;
 
         // 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;
 
         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);

     }
 }
 
     }
 }
 


@@ -161,7 +187,8 @@ char sata_ifs[][20] = { "Not detected",
 void
 __ahci_hba_isr(isr_param param)
 {
 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(KDEBUG "HBA INTR\n");
 }
 


@@ -197,6 +224,9 @@ ahci_list_device()
         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 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);
     }
         kprintf("\t\t model: %s\n", &dev_info->model);
         kprintf("\t\t serial: %s\n", &dev_info->serial_num);
     }


@@ -237,24 +267,33 @@ sata_create_fis(struct sata_reg_fis* cmd_fis,
 }
 
 int
 }
 
 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");
 {
     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];
 
     // 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);
 
     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;
 
     *cmdh = cmd_header;
     *cmdt = cmd_table;


@@ -269,22 +308,21 @@ ahci_init_device(struct hba_port* port)
     struct hba_cmdt* cmd_table;
     struct hba_cmdh* cmd_header;
 
     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)));
 
     // 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);
 
     // 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;
 
     // 在命令表中构建命令FIS
     struct sata_reg_fis* cmd_fis = (struct sata_reg_fis*)cmd_table->command_fis;


@@ -366,6 +404,9 @@ ahci_init_device(struct hba_port* port)
     scsi_parse_capacity(port->device, (uint32_t*)data_in);
 
 done:
     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);
     achi_register_ops(port);
 
     vfree_dma(data_in);


@@ -374,6 +415,8 @@ done:
     return 1;
 
 fail:
     return 1;
 
 fail:

+    port->regs[HBA_RPxIS] = -1;
+    port->regs[HBA_RPxIE] |= HBA_PxINTR_DHR;

     vfree_dma(data_in);
     vfree_dma(cmd_table);
 
     vfree_dma(data_in);
     vfree_dma(cmd_table);