feat: asynchronized SATA IO

[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 664488dbe3f0a1b5969516533b2c598ef36242b0..f11ffb4fd05325cff6e31879b15d2483c143e2b7 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
@@ -13,12 +17,14 @@
 #define IDDEV_OFFLPP 106
 #define IDDEV_OFFCAPABILITIES 49
 
+static uint32_t cdb_size[] = { SCSI_CDB12, SCSI_CDB16, 0, 0 };
+
 void
 ahci_parse_dev_info(struct hba_device* dev_info, uint16_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->cbd_size = cdb_size[(*data & 0x3)];
     dev_info->wwn = *(uint64_t*)(data + IDDEV_OFFWWN);
     dev_info->block_per_sec = 1 << (*(data + IDDEV_OFFLPP) & 0xf);
     dev_info->alignment_offset = *(data + IDDEV_OFFALIGN) & 0x3fff;
@@ -47,4 +53,51 @@ ahci_parsestr(char* str, uint16_t* reg_start, int size_word)
         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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