Second Extended Filesystem (ext2) and other improvements (#33)

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

diff --git a/lunaix-os/hal/ahci/utils.c b/lunaix-os/hal/ahci/utils.c
index 3b1fbcb5f27fb83fa7d5106cedb7d5f9db36c80e..8c39971ee15a9c33901b46fe6e66ffc3b142e11a 100644 (file)
--- a/lunaix-os/hal/ahci/utils.c
+++ b/lunaix-os/hal/ahci/utils.c
@@ -1,7 +1,11 @@
+#include <hal/ahci/ahci.h>
 #include <hal/ahci/hba.h>
-#include <hal/ahci/utils.h>
+#include <hal/ahci/sata.h>
+#include <hal/ahci/scsi.h>
 #include <klibc/string.h>
 
+#include <lunaix/spike.h>
+
 #define IDDEV_OFFMAXLBA 60
 #define IDDEV_OFFMAXLBA_EXT 230
 #define IDDEV_OFFLSECSIZE 117
@@ -9,36 +13,93 @@
 #define IDDEV_OFFSERIALNUM 10
 #define IDDEV_OFFMODELNUM 27
 #define IDDEV_OFFADDSUPPORT 69
+#define IDDEV_OFFA48SUPPORT 83
+#define IDDEV_OFFALIGN 209
+#define IDDEV_OFFLPP 106
+#define IDDEV_OFFCAPABILITIES 49
+
+static u32_t cdb_size[] = { SCSI_CDB12, SCSI_CDB16, 0, 0 };
 
 void
-ahci_parse_dev_info(struct hba_device* dev_info, uint16_t* data)
+ahci_parse_dev_info(struct hba_device* dev_info, u16_t* data)
 {
-    dev_info->max_lba = *((uint32_t*)(data + IDDEV_OFFMAXLBA));
-    dev_info->block_size = *((uint32_t*)(data + IDDEV_OFFLSECSIZE));
-    dev_info->cbd_size = (*data & 0x3) ? 16 : 12;
-    dev_info->wwn = *(uint64_t*)(data + IDDEV_OFFWWN);
+    dev_info->max_lba = *((u32_t*)(data + IDDEV_OFFMAXLBA));
+    dev_info->block_size = *((u32_t*)(data + IDDEV_OFFLSECSIZE));
+    dev_info->cbd_size = cdb_size[(*data & 0x3)];
+    dev_info->wwn = *(u64_t*)(data + IDDEV_OFFWWN);
+    dev_info->block_per_sec = 1 << (*(data + IDDEV_OFFLPP) & 0xf);
+    dev_info->alignment_offset = *(data + IDDEV_OFFALIGN) & 0x3fff;
+    dev_info->capabilities = *((u32_t*)(data + IDDEV_OFFCAPABILITIES));
 
     if (!dev_info->block_size) {
         dev_info->block_size = 512;
     }
 
-    if ((*(data + IDDEV_OFFADDSUPPORT) & 0x8)) {
-        dev_info->max_lba = *((uint64_t*)(data + IDDEV_OFFMAXLBA_EXT));
+    if ((*(data + IDDEV_OFFADDSUPPORT) & 0x8) &&
+        (*(data + IDDEV_OFFA48SUPPORT) & 0x400)) {
+        dev_info->max_lba = *((lba_t*)(data + IDDEV_OFFMAXLBA_EXT));
         dev_info->flags |= HBA_DEV_FEXTLBA;
     }
 
-    ahci_parsestr(&dev_info->serial_num, data + IDDEV_OFFSERIALNUM, 10);
-    ahci_parsestr(&dev_info->model, data + IDDEV_OFFMODELNUM, 20);
+    ahci_parsestr(dev_info->serial_num, data + IDDEV_OFFSERIALNUM, 10);
+    ahci_parsestr(dev_info->model, data + IDDEV_OFFMODELNUM, 20);
 }
 
 void
-ahci_parsestr(char* str, uint16_t* reg_start, int size_word)
+ahci_parsestr(char* str, u16_t* reg_start, int size_word)
 {
     int j = 0;
     for (int i = 0; i < size_word; i++, j += 2) {
-        uint16_t reg = *(reg_start + i);
+        u16_t reg = *(reg_start + i);
         str[j] = (char)(reg >> 8);
         str[j + 1] = (char)(reg & 0xff);
     }
     str[j - 1] = '\0';
+    strrtrim(str);
+}
+
+int
+ahci_try_send(struct hba_port* port, int slot)
+{
+    int retries = 0, bitmask = 1 << slot;
+
+    // 确保端口是空闲的
+    wait_until(!(port->regs[HBA_RPxTFD] & (HBA_PxTFD_BSY | HBA_PxTFD_DRQ)));
+
+    hba_clear_reg(port->regs[HBA_RPxIS]);
+
+    while (retries < MAX_RETRY) {
+        // 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] = bitmask;
+
+        wait_until_expire(!(port->regs[HBA_RPxCI] & bitmask), 1000000);
+
+        port->regs[HBA_RPxCI] &= ~bitmask; // ensure CI bit is cleared
+        if ((port->regs[HBA_RPxTFD] & HBA_PxTFD_ERR)) {
+            // 有错误
+            sata_read_error(port);
+            retries++;
+        } else {
+            break;
+        }
+    }
+
+    hba_clear_reg(port->regs[HBA_RPxIS]);
+
+    return retries < MAX_RETRY;
+}
+
+void
+ahci_post(struct hba_port* port, struct hba_cmd_state* state, int slot)
+{
+    int bitmask = 1 << slot;
+
+    // 确保端口是空闲的
+    wait_until(!(port->regs[HBA_RPxTFD] & (HBA_PxTFD_BSY | HBA_PxTFD_DRQ)));
+
+    hba_clear_reg(port->regs[HBA_RPxIS]);
+
+    port->cmdctx.issued[slot] = state;
+    port->cmdctx.tracked_ci |= bitmask;
+    port->regs[HBA_RPxCI] |= bitmask;
 }
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