*
*/
#include <hal/ahci/ahci.h>
+#include <hal/ahci/hba.h>
+#include <hal/ahci/sata.h>
+#include <hal/ahci/scsi.h>
#include <hal/ahci/utils.h>
+
#include <hal/pci.h>
#include <klibc/string.h>
#include <lunaix/mm/mmio.h>
#define HBA_FIS_SIZE 256
#define HBA_CLB_SIZE 1024
+// #define DO_HBA_FULL_RESET
+
LOG_MODULE("AHCI")
static struct ahci_hba hba;
void
__ahci_hba_isr(isr_param param);
+int
+ahci_init_device(struct hba_port* port);
+
+void
+achi_register_ops(struct hba_port* port);
+
+unsigned int
+ahci_get_port_usage()
+{
+ return hba.ports_bmp;
+}
+
+struct hba_port*
+ahci_get_port(unsigned int index)
+{
+ if (index >= 32) {
+ return 0;
+ }
+ 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()
{
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));
+#endif
// 启用AHCI工作模式，启用中断
hba.base[HBA_RGHC] |= HBA_RGHC_ACHI_ENABLE;
// As per section 3.1.1, this is 0 based value.
hba_reg_t cap = hba.base[HBA_RCAP];
+ hba_reg_t pmap = hba.base[HBA_RPI];
+
hba.ports_num = (cap & 0x1f) + 1; // CAP.PI
hba.cmd_slots = (cap >> 8) & 0x1f; // CAP.NCS
hba.version = hba.base[HBA_RVER];
+ hba.ports_bmp = pmap;
/* ------ HBA端口配置 ------ */
- hba_reg_t pmap = hba.base[HBA_RPI];
uintptr_t clb_pg_addr, fis_pg_addr, clb_pa, fis_pa;
for (size_t i = 0, fisp = 0, clbp = 0; i < 32;
i++, pmap >>= 1, fisp = (fisp + 1) % 16, clbp = (clbp + 1) % 4) {
continue;
}
- struct ahci_port* port =
- (struct ahci_port*)valloc(sizeof(struct ahci_port));
+ struct hba_port* port =
+ (struct hba_port*)valloc(sizeof(struct hba_port));
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);
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],
- .cmdlst = clb_pg_addr + clbp * HBA_CLB_SIZE,
- .fis = fis_pg_addr + fisp * HBA_FIS_SIZE };
+ *port = (struct hba_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;
// 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");
- }
+ 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");
}
}
}
hba.version,
hba.ports_num,
hba.cmd_slots);
- struct ahci_port* port;
+ struct hba_port* port;
for (size_t i = 0; i < 32; i++) {
port = hba.ports[i];
- // 愚蠢的gcc似乎认为 struct ahci_port* 不可能为空
+ // 愚蠢的gcc似乎认为 struct hba_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) {
kprintf("\t Port %d: %s (%x)\n",
i,
&sata_ifs[device_state],
- port->regs[HBA_RPxSIG]);
+ port->device->flags);
- struct ahci_device_info* dev_info = port->device_info;
+ struct hba_device* dev_info = port->device;
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);
+ (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);
}
}
int
-achi_alloc_slot(struct ahci_port* port)
+__get_free_slot(struct hba_port* port)
{
hba_reg_t pxsact = port->regs[HBA_RPxSACT];
hba_reg_t pxci = port->regs[HBA_RPxCI];
}
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)
+sata_create_fis(struct sata_reg_fis* cmd_fis,
+ uint8_t command,
+ uint64_t lba,
+ 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->lba0 = SATA_LBA_COMPONENT(lba, 0);
+ cmd_fis->lba8 = SATA_LBA_COMPONENT(lba, 8);
+ cmd_fis->lba16 = SATA_LBA_COMPONENT(lba, 16);
+ cmd_fis->lba24 = SATA_LBA_COMPONENT(lba, 24);
- cmd_fis->lba32 = SATA_LBA_COMPONENT(lba_hi, 0);
- cmd_fis->lba40 = SATA_LBA_COMPONENT(lba_hi, 8);
+ cmd_fis->lba32 = SATA_LBA_COMPONENT(lba, 32);
+ cmd_fis->lba40 = SATA_LBA_COMPONENT(lba, 40);
cmd_fis->count = sector_count;
}
int
-ahci_identify_device(struct ahci_port* port)
+hba_prepare_cmd(struct hba_port* port,
+ struct hba_cmdt** cmdt,
+ struct hba_cmdh** cmdh,
+ void* buffer,
+ unsigned int size)
{
- 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 */
+ 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 ahci_hba_cmdh* cmd_header = &port->cmdlst[slot];
- struct ahci_hba_cmdt* cmd_table = valloc_dma(sizeof(struct ahci_hba_cmdt));
+ struct hba_cmdh* cmd_header = &port->cmdlst[slot];
+ struct hba_cmdt* cmd_table = vcalloc_dma(sizeof(struct hba_cmdt));
memset(cmd_header, 0, sizeof(*cmd_header));
- memset(cmd_table, 0, sizeof(*cmd_table));
+
+ // 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;
+
+ 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;
+
+ return slot;
+}
+
+int
+ahci_init_device(struct hba_port* port)
+{
+ /* 发送ATA命令，参考：SATA AHCI Spec Rev.1.3.1, section 5.5 */
+ struct hba_cmdt* cmd_table;
+ struct hba_cmdh* cmd_header;
+
+ // 确保端口是空闲的
+ wait_until(!(port->regs[HBA_RPxTFD] & (HBA_PxTFD_BSY)));
// 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
+ 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;
// 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);
+ sata_create_fis(cmd_fis, ATA_IDENTIFY_DEVICE, 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);
+ port->device->flags |= HBA_DEV_FATAPI;
+ sata_create_fis(cmd_fis, ATA_IDENTIFY_PAKCET_DEVICE, 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)));
+ if ((port->regs[HBA_RPxTFD] & HBA_PxTFD_ERR)) {
+ // 有错误
+ sata_read_error(port);
+ goto fail;
+ }
+
/*
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
+ */
+ ahci_parse_dev_info(port->device, data_in);
- 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。
+ if (!(port->device->flags & HBA_DEV_FATAPI)) {
+ goto done;
+ }
+
+ /*
+ 注意：ATAPI设备是无法通过IDENTIFY PACKET DEVICE 获取容量信息的。
+ 我们需要使用SCSI命令的READ_CAPACITY(16)进行获取。
+ 步骤如下：
+ 1. 因为ATAPI走的是SCSI，而AHCI对此专门进行了SATA的封装，
+ 也就是通过SATA的PACKET命令对SCSI命令进行封装。所以我们
+ 首先需要构建一个PACKET命令的FIS
+ 2. 接着，在ACMD中构建命令READ_CAPACITY的CDB - 一种SCSI命令的封装
+ 3. 然后把cmd_header->options的A位置位，表示这是一个送往ATAPI的命令。
+ 一点细节：
+ 1. HBA往底层SATA控制器发送PACKET FIS
+ 2. SATA控制器回复PIO Setup FIS
+ 3. HBA读入ACMD中的CDB，打包成Data FIS进行答复
+ 4. SATA控制器解包，拿到CDB，通过SCSI协议转发往ATAPI设备。
+ 5. ATAPI设备回复Return Parameter，SATA通过DMA Setup FIS
+ 发起DMA请求，HBA介入，将Return Parameter写入我们在PRDT
+ 里设置的data_in位置。
+ 4. 最后照常等待HBA把结果写入data_in，然后直接解析就好了。
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);
+ struct scsi_cdb16* cdb16 = (struct scsi_cdb16*)cmd_table->atapi_cmd;
+
+ sata_create_fis(cmd_fis, ATA_PACKET, 512 << 8, 0);
+ scsi_create_packet16(cdb16, SCSI_READ_CAPACITY_16, 0, 512);
+
+ cdb16->misc1 = 0x10; // service action
+ cmd_header->transferred_size = 0;
+ cmd_header->options |= HBA_CMDH_ATAPI;
+
+ port->regs[HBA_RPxCI] = (1 << slot);
+ wait_until(!(port->regs[HBA_RPxCI] & (1 << slot)));
+
+ if ((port->regs[HBA_RPxTFD] & HBA_PxTFD_ERR)) {
+ // 有错误
+ sata_read_error(port);
+ goto fail;
+ }
+
+ scsi_parse_capacity(port->device, (uint32_t*)data_in);
+
+done:
+ achi_register_ops(port);
vfree_dma(data_in);
vfree_dma(cmd_table);
return 1;
+
+fail:
+ vfree_dma(data_in);
+ vfree_dma(cmd_table);
+
+ return 0;
+}
+
+int
+ahci_identify_device(struct hba_port* port)
+{
+ // 用于重新识别设备（比如在热插拔的情况下）
+ vfree(port->device);
+ return ahci_init_device(port);
}
-// TODO: Support ATAPI Device.
\ No newline at end of file
+void
+achi_register_ops(struct hba_port* port)
+{
+ port->device->ops.identify = ahci_identify_device;
+ if (!(port->device->flags & HBA_DEV_FATAPI)) {
+ port->device->ops.read_buffer = sata_read_buffer;
+ port->device->ops.write_buffer = sata_write_buffer;
+ } else {
+ port->device->ops.read_buffer = scsi_read_buffer;
+ port->device->ops.write_buffer = scsi_write_buffer;
+ }
+}
\ No newline at end of file
git://scm.lunaixsky.com / lunaix-os.git / blobdiff