| /* |
| * QEMU AHCI Emulation |
| * |
| * Copyright (c) 2010 qiaochong@loongson.cn |
| * Copyright (c) 2010 Roland Elek <elek.roland@gmail.com> |
| * Copyright (c) 2010 Sebastian Herbszt <herbszt@gmx.de> |
| * Copyright (c) 2010 Alexander Graf <agraf@suse.de> |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this library; if not, see <http://www.gnu.org/licenses/>. |
| * |
| */ |
| |
| #include <hw/hw.h> |
| #include <hw/msi.h> |
| #include <hw/pc.h> |
| #include <hw/pci.h> |
| |
| #include "monitor.h" |
| #include "dma.h" |
| #include "cpu-common.h" |
| #include "internal.h" |
| #include <hw/ide/pci.h> |
| #include <hw/ide/ahci.h> |
| |
| /* #define DEBUG_AHCI */ |
| |
| #ifdef DEBUG_AHCI |
| #define DPRINTF(port, fmt, ...) \ |
| do { fprintf(stderr, "ahci: %s: [%d] ", __FUNCTION__, port); \ |
| fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) |
| #else |
| #define DPRINTF(port, fmt, ...) do {} while(0) |
| #endif |
| |
| static void check_cmd(AHCIState *s, int port); |
| static int handle_cmd(AHCIState *s,int port,int slot); |
| static void ahci_reset_port(AHCIState *s, int port); |
| static void ahci_write_fis_d2h(AHCIDevice *ad, uint8_t *cmd_fis); |
| static void ahci_init_d2h(AHCIDevice *ad); |
| |
| static uint32_t ahci_port_read(AHCIState *s, int port, int offset) |
| { |
| uint32_t val; |
| AHCIPortRegs *pr; |
| pr = &s->dev[port].port_regs; |
| |
| switch (offset) { |
| case PORT_LST_ADDR: |
| val = pr->lst_addr; |
| break; |
| case PORT_LST_ADDR_HI: |
| val = pr->lst_addr_hi; |
| break; |
| case PORT_FIS_ADDR: |
| val = pr->fis_addr; |
| break; |
| case PORT_FIS_ADDR_HI: |
| val = pr->fis_addr_hi; |
| break; |
| case PORT_IRQ_STAT: |
| val = pr->irq_stat; |
| break; |
| case PORT_IRQ_MASK: |
| val = pr->irq_mask; |
| break; |
| case PORT_CMD: |
| val = pr->cmd; |
| break; |
| case PORT_TFDATA: |
| val = ((uint16_t)s->dev[port].port.ifs[0].error << 8) | |
| s->dev[port].port.ifs[0].status; |
| break; |
| case PORT_SIG: |
| val = pr->sig; |
| break; |
| case PORT_SCR_STAT: |
| if (s->dev[port].port.ifs[0].bs) { |
| val = SATA_SCR_SSTATUS_DET_DEV_PRESENT_PHY_UP | |
| SATA_SCR_SSTATUS_SPD_GEN1 | SATA_SCR_SSTATUS_IPM_ACTIVE; |
| } else { |
| val = SATA_SCR_SSTATUS_DET_NODEV; |
| } |
| break; |
| case PORT_SCR_CTL: |
| val = pr->scr_ctl; |
| break; |
| case PORT_SCR_ERR: |
| val = pr->scr_err; |
| break; |
| case PORT_SCR_ACT: |
| pr->scr_act &= ~s->dev[port].finished; |
| s->dev[port].finished = 0; |
| val = pr->scr_act; |
| break; |
| case PORT_CMD_ISSUE: |
| val = pr->cmd_issue; |
| break; |
| case PORT_RESERVED: |
| default: |
| val = 0; |
| } |
| DPRINTF(port, "offset: 0x%x val: 0x%x\n", offset, val); |
| return val; |
| |
| } |
| |
| static void ahci_irq_raise(AHCIState *s, AHCIDevice *dev) |
| { |
| struct AHCIPCIState *d = container_of(s, AHCIPCIState, ahci); |
| |
| DPRINTF(0, "raise irq\n"); |
| |
| if (msi_enabled(&d->card)) { |
| msi_notify(&d->card, 0); |
| } else { |
| qemu_irq_raise(s->irq); |
| } |
| } |
| |
| static void ahci_irq_lower(AHCIState *s, AHCIDevice *dev) |
| { |
| struct AHCIPCIState *d = container_of(s, AHCIPCIState, ahci); |
| |
| DPRINTF(0, "lower irq\n"); |
| |
| if (!msi_enabled(&d->card)) { |
| qemu_irq_lower(s->irq); |
| } |
| } |
| |
| static void ahci_check_irq(AHCIState *s) |
| { |
| int i; |
| |
| DPRINTF(-1, "check irq %#x\n", s->control_regs.irqstatus); |
| |
| for (i = 0; i < s->ports; i++) { |
| AHCIPortRegs *pr = &s->dev[i].port_regs; |
| if (pr->irq_stat & pr->irq_mask) { |
| s->control_regs.irqstatus |= (1 << i); |
| } |
| } |
| |
| if (s->control_regs.irqstatus && |
| (s->control_regs.ghc & HOST_CTL_IRQ_EN)) { |
| ahci_irq_raise(s, NULL); |
| } else { |
| ahci_irq_lower(s, NULL); |
| } |
| } |
| |
| static void ahci_trigger_irq(AHCIState *s, AHCIDevice *d, |
| int irq_type) |
| { |
| DPRINTF(d->port_no, "trigger irq %#x -> %x\n", |
| irq_type, d->port_regs.irq_mask & irq_type); |
| |
| d->port_regs.irq_stat |= irq_type; |
| ahci_check_irq(s); |
| } |
| |
| static void map_page(uint8_t **ptr, uint64_t addr, uint32_t wanted) |
| { |
| target_phys_addr_t len = wanted; |
| |
| if (*ptr) { |
| cpu_physical_memory_unmap(*ptr, len, 1, len); |
| } |
| |
| *ptr = cpu_physical_memory_map(addr, &len, 1); |
| if (len < wanted) { |
| cpu_physical_memory_unmap(*ptr, len, 1, len); |
| *ptr = NULL; |
| } |
| } |
| |
| static void ahci_port_write(AHCIState *s, int port, int offset, uint32_t val) |
| { |
| AHCIPortRegs *pr = &s->dev[port].port_regs; |
| |
| DPRINTF(port, "offset: 0x%x val: 0x%x\n", offset, val); |
| switch (offset) { |
| case PORT_LST_ADDR: |
| pr->lst_addr = val; |
| map_page(&s->dev[port].lst, |
| ((uint64_t)pr->lst_addr_hi << 32) | pr->lst_addr, 1024); |
| s->dev[port].cur_cmd = NULL; |
| break; |
| case PORT_LST_ADDR_HI: |
| pr->lst_addr_hi = val; |
| map_page(&s->dev[port].lst, |
| ((uint64_t)pr->lst_addr_hi << 32) | pr->lst_addr, 1024); |
| s->dev[port].cur_cmd = NULL; |
| break; |
| case PORT_FIS_ADDR: |
| pr->fis_addr = val; |
| map_page(&s->dev[port].res_fis, |
| ((uint64_t)pr->fis_addr_hi << 32) | pr->fis_addr, 256); |
| break; |
| case PORT_FIS_ADDR_HI: |
| pr->fis_addr_hi = val; |
| map_page(&s->dev[port].res_fis, |
| ((uint64_t)pr->fis_addr_hi << 32) | pr->fis_addr, 256); |
| break; |
| case PORT_IRQ_STAT: |
| pr->irq_stat &= ~val; |
| break; |
| case PORT_IRQ_MASK: |
| pr->irq_mask = val & 0xfdc000ff; |
| ahci_check_irq(s); |
| break; |
| case PORT_CMD: |
| pr->cmd = val & ~(PORT_CMD_LIST_ON | PORT_CMD_FIS_ON); |
| |
| if (pr->cmd & PORT_CMD_START) { |
| pr->cmd |= PORT_CMD_LIST_ON; |
| } |
| |
| if (pr->cmd & PORT_CMD_FIS_RX) { |
| pr->cmd |= PORT_CMD_FIS_ON; |
| } |
| |
| /* XXX usually the FIS would be pending on the bus here and |
| issuing deferred until the OS enables FIS receival. |
| Instead, we only submit it once - which works in most |
| cases, but is a hack. */ |
| if ((pr->cmd & PORT_CMD_FIS_ON) && |
| !s->dev[port].init_d2h_sent) { |
| ahci_init_d2h(&s->dev[port]); |
| s->dev[port].init_d2h_sent = 1; |
| } |
| |
| check_cmd(s, port); |
| break; |
| case PORT_TFDATA: |
| s->dev[port].port.ifs[0].error = (val >> 8) & 0xff; |
| s->dev[port].port.ifs[0].status = val & 0xff; |
| break; |
| case PORT_SIG: |
| pr->sig = val; |
| break; |
| case PORT_SCR_STAT: |
| pr->scr_stat = val; |
| break; |
| case PORT_SCR_CTL: |
| if (((pr->scr_ctl & AHCI_SCR_SCTL_DET) == 1) && |
| ((val & AHCI_SCR_SCTL_DET) == 0)) { |
| ahci_reset_port(s, port); |
| } |
| pr->scr_ctl = val; |
| break; |
| case PORT_SCR_ERR: |
| pr->scr_err &= ~val; |
| break; |
| case PORT_SCR_ACT: |
| /* RW1 */ |
| pr->scr_act |= val; |
| break; |
| case PORT_CMD_ISSUE: |
| pr->cmd_issue |= val; |
| check_cmd(s, port); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| static uint64_t ahci_mem_read(void *opaque, target_phys_addr_t addr, |
| unsigned size) |
| { |
| AHCIState *s = opaque; |
| uint32_t val = 0; |
| |
| if (addr < AHCI_GENERIC_HOST_CONTROL_REGS_MAX_ADDR) { |
| switch (addr) { |
| case HOST_CAP: |
| val = s->control_regs.cap; |
| break; |
| case HOST_CTL: |
| val = s->control_regs.ghc; |
| break; |
| case HOST_IRQ_STAT: |
| val = s->control_regs.irqstatus; |
| break; |
| case HOST_PORTS_IMPL: |
| val = s->control_regs.impl; |
| break; |
| case HOST_VERSION: |
| val = s->control_regs.version; |
| break; |
| } |
| |
| DPRINTF(-1, "(addr 0x%08X), val 0x%08X\n", (unsigned) addr, val); |
| } else if ((addr >= AHCI_PORT_REGS_START_ADDR) && |
| (addr < (AHCI_PORT_REGS_START_ADDR + |
| (s->ports * AHCI_PORT_ADDR_OFFSET_LEN)))) { |
| val = ahci_port_read(s, (addr - AHCI_PORT_REGS_START_ADDR) >> 7, |
| addr & AHCI_PORT_ADDR_OFFSET_MASK); |
| } |
| |
| return val; |
| } |
| |
| |
| |
| static void ahci_mem_write(void *opaque, target_phys_addr_t addr, |
| uint64_t val, unsigned size) |
| { |
| AHCIState *s = opaque; |
| |
| /* Only aligned reads are allowed on AHCI */ |
| if (addr & 3) { |
| fprintf(stderr, "ahci: Mis-aligned write to addr 0x" |
| TARGET_FMT_plx "\n", addr); |
| return; |
| } |
| |
| if (addr < AHCI_GENERIC_HOST_CONTROL_REGS_MAX_ADDR) { |
| DPRINTF(-1, "(addr 0x%08X), val 0x%08X\n", (unsigned) addr, val); |
| |
| switch (addr) { |
| case HOST_CAP: /* R/WO, RO */ |
| /* FIXME handle R/WO */ |
| break; |
| case HOST_CTL: /* R/W */ |
| if (val & HOST_CTL_RESET) { |
| DPRINTF(-1, "HBA Reset\n"); |
| ahci_reset(container_of(s, AHCIPCIState, ahci)); |
| } else { |
| s->control_regs.ghc = (val & 0x3) | HOST_CTL_AHCI_EN; |
| ahci_check_irq(s); |
| } |
| break; |
| case HOST_IRQ_STAT: /* R/WC, RO */ |
| s->control_regs.irqstatus &= ~val; |
| ahci_check_irq(s); |
| break; |
| case HOST_PORTS_IMPL: /* R/WO, RO */ |
| /* FIXME handle R/WO */ |
| break; |
| case HOST_VERSION: /* RO */ |
| /* FIXME report write? */ |
| break; |
| default: |
| DPRINTF(-1, "write to unknown register 0x%x\n", (unsigned)addr); |
| } |
| } else if ((addr >= AHCI_PORT_REGS_START_ADDR) && |
| (addr < (AHCI_PORT_REGS_START_ADDR + |
| (s->ports * AHCI_PORT_ADDR_OFFSET_LEN)))) { |
| ahci_port_write(s, (addr - AHCI_PORT_REGS_START_ADDR) >> 7, |
| addr & AHCI_PORT_ADDR_OFFSET_MASK, val); |
| } |
| |
| } |
| |
| static MemoryRegionOps ahci_mem_ops = { |
| .read = ahci_mem_read, |
| .write = ahci_mem_write, |
| .endianness = DEVICE_LITTLE_ENDIAN, |
| }; |
| |
| static void ahci_reg_init(AHCIState *s) |
| { |
| int i; |
| |
| s->control_regs.cap = (s->ports - 1) | |
| (AHCI_NUM_COMMAND_SLOTS << 8) | |
| (AHCI_SUPPORTED_SPEED_GEN1 << AHCI_SUPPORTED_SPEED) | |
| HOST_CAP_NCQ | HOST_CAP_AHCI; |
| |
| s->control_regs.impl = (1 << s->ports) - 1; |
| |
| s->control_regs.version = AHCI_VERSION_1_0; |
| |
| for (i = 0; i < s->ports; i++) { |
| s->dev[i].port_state = STATE_RUN; |
| } |
| } |
| |
| static uint32_t read_from_sglist(uint8_t *buffer, uint32_t len, |
| QEMUSGList *sglist) |
| { |
| uint32_t i = 0; |
| uint32_t total = 0, once; |
| ScatterGatherEntry *cur_prd; |
| uint32_t sgcount; |
| |
| cur_prd = sglist->sg; |
| sgcount = sglist->nsg; |
| for (i = 0; len && sgcount; i++) { |
| once = MIN(cur_prd->len, len); |
| cpu_physical_memory_read(cur_prd->base, buffer, once); |
| cur_prd++; |
| sgcount--; |
| len -= once; |
| buffer += once; |
| total += once; |
| } |
| |
| return total; |
| } |
| |
| static uint32_t write_to_sglist(uint8_t *buffer, uint32_t len, |
| QEMUSGList *sglist) |
| { |
| uint32_t i = 0; |
| uint32_t total = 0, once; |
| ScatterGatherEntry *cur_prd; |
| uint32_t sgcount; |
| |
| DPRINTF(-1, "total: 0x%x bytes\n", len); |
| |
| cur_prd = sglist->sg; |
| sgcount = sglist->nsg; |
| for (i = 0; len && sgcount; i++) { |
| once = MIN(cur_prd->len, len); |
| DPRINTF(-1, "write 0x%x bytes to 0x%lx\n", once, (long)cur_prd->base); |
| cpu_physical_memory_write(cur_prd->base, buffer, once); |
| cur_prd++; |
| sgcount--; |
| len -= once; |
| buffer += once; |
| total += once; |
| } |
| |
| return total; |
| } |
| |
| static void check_cmd(AHCIState *s, int port) |
| { |
| AHCIPortRegs *pr = &s->dev[port].port_regs; |
| int slot; |
| |
| if ((pr->cmd & PORT_CMD_START) && pr->cmd_issue) { |
| for (slot = 0; (slot < 32) && pr->cmd_issue; slot++) { |
| if ((pr->cmd_issue & (1 << slot)) && |
| !handle_cmd(s, port, slot)) { |
| pr->cmd_issue &= ~(1 << slot); |
| } |
| } |
| } |
| } |
| |
| static void ahci_check_cmd_bh(void *opaque) |
| { |
| AHCIDevice *ad = opaque; |
| |
| qemu_bh_delete(ad->check_bh); |
| ad->check_bh = NULL; |
| |
| if ((ad->busy_slot != -1) && |
| !(ad->port.ifs[0].status & (BUSY_STAT|DRQ_STAT))) { |
| /* no longer busy */ |
| ad->port_regs.cmd_issue &= ~(1 << ad->busy_slot); |
| ad->busy_slot = -1; |
| } |
| |
| check_cmd(ad->hba, ad->port_no); |
| } |
| |
| static void ahci_init_d2h(AHCIDevice *ad) |
| { |
| uint8_t init_fis[0x20]; |
| IDEState *ide_state = &ad->port.ifs[0]; |
| |
| memset(init_fis, 0, sizeof(init_fis)); |
| |
| init_fis[4] = 1; |
| init_fis[12] = 1; |
| |
| if (ide_state->drive_kind == IDE_CD) { |
| init_fis[5] = ide_state->lcyl; |
| init_fis[6] = ide_state->hcyl; |
| } |
| |
| ahci_write_fis_d2h(ad, init_fis); |
| } |
| |
| static void ahci_reset_port(AHCIState *s, int port) |
| { |
| AHCIDevice *d = &s->dev[port]; |
| AHCIPortRegs *pr = &d->port_regs; |
| IDEState *ide_state = &d->port.ifs[0]; |
| int i; |
| |
| DPRINTF(port, "reset port\n"); |
| |
| ide_bus_reset(&d->port); |
| ide_state->ncq_queues = AHCI_MAX_CMDS; |
| |
| pr->irq_stat = 0; |
| pr->irq_mask = 0; |
| pr->scr_stat = 0; |
| pr->scr_ctl = 0; |
| pr->scr_err = 0; |
| pr->scr_act = 0; |
| d->busy_slot = -1; |
| d->init_d2h_sent = 0; |
| |
| ide_state = &s->dev[port].port.ifs[0]; |
| if (!ide_state->bs) { |
| return; |
| } |
| |
| /* reset ncq queue */ |
| for (i = 0; i < AHCI_MAX_CMDS; i++) { |
| NCQTransferState *ncq_tfs = &s->dev[port].ncq_tfs[i]; |
| if (!ncq_tfs->used) { |
| continue; |
| } |
| |
| if (ncq_tfs->aiocb) { |
| bdrv_aio_cancel(ncq_tfs->aiocb); |
| ncq_tfs->aiocb = NULL; |
| } |
| |
| qemu_sglist_destroy(&ncq_tfs->sglist); |
| ncq_tfs->used = 0; |
| } |
| |
| s->dev[port].port_state = STATE_RUN; |
| if (!ide_state->bs) { |
| s->dev[port].port_regs.sig = 0; |
| ide_state->status = SEEK_STAT | WRERR_STAT; |
| } else if (ide_state->drive_kind == IDE_CD) { |
| s->dev[port].port_regs.sig = SATA_SIGNATURE_CDROM; |
| ide_state->lcyl = 0x14; |
| ide_state->hcyl = 0xeb; |
| DPRINTF(port, "set lcyl = %d\n", ide_state->lcyl); |
| ide_state->status = SEEK_STAT | WRERR_STAT | READY_STAT; |
| } else { |
| s->dev[port].port_regs.sig = SATA_SIGNATURE_DISK; |
| ide_state->status = SEEK_STAT | WRERR_STAT; |
| } |
| |
| ide_state->error = 1; |
| ahci_init_d2h(d); |
| } |
| |
| static void debug_print_fis(uint8_t *fis, int cmd_len) |
| { |
| #ifdef DEBUG_AHCI |
| int i; |
| |
| fprintf(stderr, "fis:"); |
| for (i = 0; i < cmd_len; i++) { |
| if ((i & 0xf) == 0) { |
| fprintf(stderr, "\n%02x:",i); |
| } |
| fprintf(stderr, "%02x ",fis[i]); |
| } |
| fprintf(stderr, "\n"); |
| #endif |
| } |
| |
| static void ahci_write_fis_sdb(AHCIState *s, int port, uint32_t finished) |
| { |
| AHCIPortRegs *pr = &s->dev[port].port_regs; |
| IDEState *ide_state; |
| uint8_t *sdb_fis; |
| |
| if (!s->dev[port].res_fis || |
| !(pr->cmd & PORT_CMD_FIS_RX)) { |
| return; |
| } |
| |
| sdb_fis = &s->dev[port].res_fis[RES_FIS_SDBFIS]; |
| ide_state = &s->dev[port].port.ifs[0]; |
| |
| /* clear memory */ |
| *(uint32_t*)sdb_fis = 0; |
| |
| /* write values */ |
| sdb_fis[0] = ide_state->error; |
| sdb_fis[2] = ide_state->status & 0x77; |
| s->dev[port].finished |= finished; |
| *(uint32_t*)(sdb_fis + 4) = cpu_to_le32(s->dev[port].finished); |
| |
| ahci_trigger_irq(s, &s->dev[port], PORT_IRQ_STAT_SDBS); |
| } |
| |
| static void ahci_write_fis_d2h(AHCIDevice *ad, uint8_t *cmd_fis) |
| { |
| AHCIPortRegs *pr = &ad->port_regs; |
| uint8_t *d2h_fis; |
| int i; |
| target_phys_addr_t cmd_len = 0x80; |
| int cmd_mapped = 0; |
| |
| if (!ad->res_fis || !(pr->cmd & PORT_CMD_FIS_RX)) { |
| return; |
| } |
| |
| if (!cmd_fis) { |
| /* map cmd_fis */ |
| uint64_t tbl_addr = le64_to_cpu(ad->cur_cmd->tbl_addr); |
| cmd_fis = cpu_physical_memory_map(tbl_addr, &cmd_len, 0); |
| cmd_mapped = 1; |
| } |
| |
| d2h_fis = &ad->res_fis[RES_FIS_RFIS]; |
| |
| d2h_fis[0] = 0x34; |
| d2h_fis[1] = (ad->hba->control_regs.irqstatus ? (1 << 6) : 0); |
| d2h_fis[2] = ad->port.ifs[0].status; |
| d2h_fis[3] = ad->port.ifs[0].error; |
| |
| d2h_fis[4] = cmd_fis[4]; |
| d2h_fis[5] = cmd_fis[5]; |
| d2h_fis[6] = cmd_fis[6]; |
| d2h_fis[7] = cmd_fis[7]; |
| d2h_fis[8] = cmd_fis[8]; |
| d2h_fis[9] = cmd_fis[9]; |
| d2h_fis[10] = cmd_fis[10]; |
| d2h_fis[11] = cmd_fis[11]; |
| d2h_fis[12] = cmd_fis[12]; |
| d2h_fis[13] = cmd_fis[13]; |
| for (i = 14; i < 0x20; i++) { |
| d2h_fis[i] = 0; |
| } |
| |
| if (d2h_fis[2] & ERR_STAT) { |
| ahci_trigger_irq(ad->hba, ad, PORT_IRQ_STAT_TFES); |
| } |
| |
| ahci_trigger_irq(ad->hba, ad, PORT_IRQ_D2H_REG_FIS); |
| |
| if (cmd_mapped) { |
| cpu_physical_memory_unmap(cmd_fis, cmd_len, 0, cmd_len); |
| } |
| } |
| |
| static int ahci_populate_sglist(AHCIDevice *ad, QEMUSGList *sglist) |
| { |
| AHCICmdHdr *cmd = ad->cur_cmd; |
| uint32_t opts = le32_to_cpu(cmd->opts); |
| uint64_t prdt_addr = le64_to_cpu(cmd->tbl_addr) + 0x80; |
| int sglist_alloc_hint = opts >> AHCI_CMD_HDR_PRDT_LEN; |
| target_phys_addr_t prdt_len = (sglist_alloc_hint * sizeof(AHCI_SG)); |
| target_phys_addr_t real_prdt_len = prdt_len; |
| uint8_t *prdt; |
| int i; |
| int r = 0; |
| |
| if (!sglist_alloc_hint) { |
| DPRINTF(ad->port_no, "no sg list given by guest: 0x%08x\n", opts); |
| return -1; |
| } |
| |
| /* map PRDT */ |
| if (!(prdt = cpu_physical_memory_map(prdt_addr, &prdt_len, 0))){ |
| DPRINTF(ad->port_no, "map failed\n"); |
| return -1; |
| } |
| |
| if (prdt_len < real_prdt_len) { |
| DPRINTF(ad->port_no, "mapped less than expected\n"); |
| r = -1; |
| goto out; |
| } |
| |
| /* Get entries in the PRDT, init a qemu sglist accordingly */ |
| if (sglist_alloc_hint > 0) { |
| AHCI_SG *tbl = (AHCI_SG *)prdt; |
| |
| qemu_sglist_init(sglist, sglist_alloc_hint); |
| for (i = 0; i < sglist_alloc_hint; i++) { |
| /* flags_size is zero-based */ |
| qemu_sglist_add(sglist, le64_to_cpu(tbl[i].addr), |
| le32_to_cpu(tbl[i].flags_size) + 1); |
| } |
| } |
| |
| out: |
| cpu_physical_memory_unmap(prdt, prdt_len, 0, prdt_len); |
| return r; |
| } |
| |
| static void ncq_cb(void *opaque, int ret) |
| { |
| NCQTransferState *ncq_tfs = (NCQTransferState *)opaque; |
| IDEState *ide_state = &ncq_tfs->drive->port.ifs[0]; |
| |
| /* Clear bit for this tag in SActive */ |
| ncq_tfs->drive->port_regs.scr_act &= ~(1 << ncq_tfs->tag); |
| |
| if (ret < 0) { |
| /* error */ |
| ide_state->error = ABRT_ERR; |
| ide_state->status = READY_STAT | ERR_STAT; |
| ncq_tfs->drive->port_regs.scr_err |= (1 << ncq_tfs->tag); |
| } else { |
| ide_state->status = READY_STAT | SEEK_STAT; |
| } |
| |
| ahci_write_fis_sdb(ncq_tfs->drive->hba, ncq_tfs->drive->port_no, |
| (1 << ncq_tfs->tag)); |
| |
| DPRINTF(ncq_tfs->drive->port_no, "NCQ transfer tag %d finished\n", |
| ncq_tfs->tag); |
| |
| qemu_sglist_destroy(&ncq_tfs->sglist); |
| ncq_tfs->used = 0; |
| } |
| |
| static void process_ncq_command(AHCIState *s, int port, uint8_t *cmd_fis, |
| int slot) |
| { |
| NCQFrame *ncq_fis = (NCQFrame*)cmd_fis; |
| uint8_t tag = ncq_fis->tag >> 3; |
| NCQTransferState *ncq_tfs = &s->dev[port].ncq_tfs[tag]; |
| |
| if (ncq_tfs->used) { |
| /* error - already in use */ |
| fprintf(stderr, "%s: tag %d already used\n", __FUNCTION__, tag); |
| return; |
| } |
| |
| ncq_tfs->used = 1; |
| ncq_tfs->drive = &s->dev[port]; |
| ncq_tfs->slot = slot; |
| ncq_tfs->lba = ((uint64_t)ncq_fis->lba5 << 40) | |
| ((uint64_t)ncq_fis->lba4 << 32) | |
| ((uint64_t)ncq_fis->lba3 << 24) | |
| ((uint64_t)ncq_fis->lba2 << 16) | |
| ((uint64_t)ncq_fis->lba1 << 8) | |
| (uint64_t)ncq_fis->lba0; |
| |
| /* Note: We calculate the sector count, but don't currently rely on it. |
| * The total size of the DMA buffer tells us the transfer size instead. */ |
| ncq_tfs->sector_count = ((uint16_t)ncq_fis->sector_count_high << 8) | |
| ncq_fis->sector_count_low; |
| |
| DPRINTF(port, "NCQ transfer LBA from %ld to %ld, drive max %ld\n", |
| ncq_tfs->lba, ncq_tfs->lba + ncq_tfs->sector_count - 2, |
| s->dev[port].port.ifs[0].nb_sectors - 1); |
| |
| ahci_populate_sglist(&s->dev[port], &ncq_tfs->sglist); |
| ncq_tfs->tag = tag; |
| |
| switch(ncq_fis->command) { |
| case READ_FPDMA_QUEUED: |
| DPRINTF(port, "NCQ reading %d sectors from LBA %ld, tag %d\n", |
| ncq_tfs->sector_count-1, ncq_tfs->lba, ncq_tfs->tag); |
| ncq_tfs->is_read = 1; |
| |
| DPRINTF(port, "tag %d aio read %ld\n", ncq_tfs->tag, ncq_tfs->lba); |
| ncq_tfs->aiocb = dma_bdrv_read(ncq_tfs->drive->port.ifs[0].bs, |
| &ncq_tfs->sglist, ncq_tfs->lba, |
| ncq_cb, ncq_tfs); |
| break; |
| case WRITE_FPDMA_QUEUED: |
| DPRINTF(port, "NCQ writing %d sectors to LBA %ld, tag %d\n", |
| ncq_tfs->sector_count-1, ncq_tfs->lba, ncq_tfs->tag); |
| ncq_tfs->is_read = 0; |
| |
| DPRINTF(port, "tag %d aio write %ld\n", ncq_tfs->tag, ncq_tfs->lba); |
| ncq_tfs->aiocb = dma_bdrv_write(ncq_tfs->drive->port.ifs[0].bs, |
| &ncq_tfs->sglist, ncq_tfs->lba, |
| ncq_cb, ncq_tfs); |
| break; |
| default: |
| DPRINTF(port, "error: tried to process non-NCQ command as NCQ\n"); |
| qemu_sglist_destroy(&ncq_tfs->sglist); |
| break; |
| } |
| } |
| |
| static int handle_cmd(AHCIState *s, int port, int slot) |
| { |
| IDEState *ide_state; |
| uint32_t opts; |
| uint64_t tbl_addr; |
| AHCICmdHdr *cmd; |
| uint8_t *cmd_fis; |
| target_phys_addr_t cmd_len; |
| |
| if (s->dev[port].port.ifs[0].status & (BUSY_STAT|DRQ_STAT)) { |
| /* Engine currently busy, try again later */ |
| DPRINTF(port, "engine busy\n"); |
| return -1; |
| } |
| |
| cmd = &((AHCICmdHdr *)s->dev[port].lst)[slot]; |
| |
| if (!s->dev[port].lst) { |
| DPRINTF(port, "error: lst not given but cmd handled"); |
| return -1; |
| } |
| |
| /* remember current slot handle for later */ |
| s->dev[port].cur_cmd = cmd; |
| |
| opts = le32_to_cpu(cmd->opts); |
| tbl_addr = le64_to_cpu(cmd->tbl_addr); |
| |
| cmd_len = 0x80; |
| cmd_fis = cpu_physical_memory_map(tbl_addr, &cmd_len, 1); |
| |
| if (!cmd_fis) { |
| DPRINTF(port, "error: guest passed us an invalid cmd fis\n"); |
| return -1; |
| } |
| |
| /* The device we are working for */ |
| ide_state = &s->dev[port].port.ifs[0]; |
| |
| if (!ide_state->bs) { |
| DPRINTF(port, "error: guest accessed unused port"); |
| goto out; |
| } |
| |
| debug_print_fis(cmd_fis, 0x90); |
| //debug_print_fis(cmd_fis, (opts & AHCI_CMD_HDR_CMD_FIS_LEN) * 4); |
| |
| switch (cmd_fis[0]) { |
| case SATA_FIS_TYPE_REGISTER_H2D: |
| break; |
| default: |
| DPRINTF(port, "unknown command cmd_fis[0]=%02x cmd_fis[1]=%02x " |
| "cmd_fis[2]=%02x\n", cmd_fis[0], cmd_fis[1], |
| cmd_fis[2]); |
| goto out; |
| break; |
| } |
| |
| switch (cmd_fis[1]) { |
| case SATA_FIS_REG_H2D_UPDATE_COMMAND_REGISTER: |
| break; |
| case 0: |
| break; |
| default: |
| DPRINTF(port, "unknown command cmd_fis[0]=%02x cmd_fis[1]=%02x " |
| "cmd_fis[2]=%02x\n", cmd_fis[0], cmd_fis[1], |
| cmd_fis[2]); |
| goto out; |
| break; |
| } |
| |
| switch (s->dev[port].port_state) { |
| case STATE_RUN: |
| if (cmd_fis[15] & ATA_SRST) { |
| s->dev[port].port_state = STATE_RESET; |
| } |
| break; |
| case STATE_RESET: |
| if (!(cmd_fis[15] & ATA_SRST)) { |
| ahci_reset_port(s, port); |
| } |
| break; |
| } |
| |
| if (cmd_fis[1] == SATA_FIS_REG_H2D_UPDATE_COMMAND_REGISTER) { |
| |
| /* Check for NCQ command */ |
| if ((cmd_fis[2] == READ_FPDMA_QUEUED) || |
| (cmd_fis[2] == WRITE_FPDMA_QUEUED)) { |
| process_ncq_command(s, port, cmd_fis, slot); |
| goto out; |
| } |
| |
| /* Decompose the FIS */ |
| ide_state->nsector = (int64_t)((cmd_fis[13] << 8) | cmd_fis[12]); |
| ide_state->feature = cmd_fis[3]; |
| if (!ide_state->nsector) { |
| ide_state->nsector = 256; |
| } |
| |
| if (ide_state->drive_kind != IDE_CD) { |
| /* |
| * We set the sector depending on the sector defined in the FIS. |
| * Unfortunately, the spec isn't exactly obvious on this one. |
| * |
| * Apparently LBA48 commands set fis bytes 10,9,8,6,5,4 to the |
| * 48 bit sector number. ATA_CMD_READ_DMA_EXT is an example for |
| * such a command. |
| * |
| * Non-LBA48 commands however use 7[lower 4 bits],6,5,4 to define a |
| * 28-bit sector number. ATA_CMD_READ_DMA is an example for such |
| * a command. |
| * |
| * Since the spec doesn't explicitly state what each field should |
| * do, I simply assume non-used fields as reserved and OR everything |
| * together, independent of the command. |
| */ |
| ide_set_sector(ide_state, ((uint64_t)cmd_fis[10] << 40) |
| | ((uint64_t)cmd_fis[9] << 32) |
| /* This is used for LBA48 commands */ |
| | ((uint64_t)cmd_fis[8] << 24) |
| /* This is used for non-LBA48 commands */ |
| | ((uint64_t)(cmd_fis[7] & 0xf) << 24) |
| | ((uint64_t)cmd_fis[6] << 16) |
| | ((uint64_t)cmd_fis[5] << 8) |
| | cmd_fis[4]); |
| } |
| |
| /* Copy the ACMD field (ATAPI packet, if any) from the AHCI command |
| * table to ide_state->io_buffer |
| */ |
| if (opts & AHCI_CMD_ATAPI) { |
| memcpy(ide_state->io_buffer, &cmd_fis[AHCI_COMMAND_TABLE_ACMD], 0x10); |
| ide_state->lcyl = 0x14; |
| ide_state->hcyl = 0xeb; |
| debug_print_fis(ide_state->io_buffer, 0x10); |
| ide_state->feature = IDE_FEATURE_DMA; |
| s->dev[port].done_atapi_packet = 0; |
| /* XXX send PIO setup FIS */ |
| } |
| |
| ide_state->error = 0; |
| |
| /* Reset transferred byte counter */ |
| cmd->status = 0; |
| |
| /* We're ready to process the command in FIS byte 2. */ |
| ide_exec_cmd(&s->dev[port].port, cmd_fis[2]); |
| |
| if (s->dev[port].port.ifs[0].status & READY_STAT) { |
| ahci_write_fis_d2h(&s->dev[port], cmd_fis); |
| } |
| } |
| |
| out: |
| cpu_physical_memory_unmap(cmd_fis, cmd_len, 1, cmd_len); |
| |
| if (s->dev[port].port.ifs[0].status & (BUSY_STAT|DRQ_STAT)) { |
| /* async command, complete later */ |
| s->dev[port].busy_slot = slot; |
| return -1; |
| } |
| |
| /* done handling the command */ |
| return 0; |
| } |
| |
| /* DMA dev <-> ram */ |
| static int ahci_start_transfer(IDEDMA *dma) |
| { |
| AHCIDevice *ad = DO_UPCAST(AHCIDevice, dma, dma); |
| IDEState *s = &ad->port.ifs[0]; |
| uint32_t size = (uint32_t)(s->data_end - s->data_ptr); |
| /* write == ram -> device */ |
| uint32_t opts = le32_to_cpu(ad->cur_cmd->opts); |
| int is_write = opts & AHCI_CMD_WRITE; |
| int is_atapi = opts & AHCI_CMD_ATAPI; |
| int has_sglist = 0; |
| |
| if (is_atapi && !ad->done_atapi_packet) { |
| /* already prepopulated iobuffer */ |
| ad->done_atapi_packet = 1; |
| goto out; |
| } |
| |
| if (!ahci_populate_sglist(ad, &s->sg)) { |
| has_sglist = 1; |
| } |
| |
| DPRINTF(ad->port_no, "%sing %d bytes on %s w/%s sglist\n", |
| is_write ? "writ" : "read", size, is_atapi ? "atapi" : "ata", |
| has_sglist ? "" : "o"); |
| |
| if (is_write && has_sglist && (s->data_ptr < s->data_end)) { |
| read_from_sglist(s->data_ptr, size, &s->sg); |
| } |
| |
| if (!is_write && has_sglist && (s->data_ptr < s->data_end)) { |
| write_to_sglist(s->data_ptr, size, &s->sg); |
| } |
| |
| /* update number of transferred bytes */ |
| ad->cur_cmd->status = cpu_to_le32(le32_to_cpu(ad->cur_cmd->status) + size); |
| |
| out: |
| /* declare that we processed everything */ |
| s->data_ptr = s->data_end; |
| |
| if (has_sglist) { |
| qemu_sglist_destroy(&s->sg); |
| } |
| |
| s->end_transfer_func(s); |
| |
| if (!(s->status & DRQ_STAT)) { |
| /* done with DMA */ |
| ahci_trigger_irq(ad->hba, ad, PORT_IRQ_STAT_DSS); |
| } |
| |
| return 0; |
| } |
| |
| static void ahci_start_dma(IDEDMA *dma, IDEState *s, |
| BlockDriverCompletionFunc *dma_cb) |
| { |
| AHCIDevice *ad = DO_UPCAST(AHCIDevice, dma, dma); |
| |
| DPRINTF(ad->port_no, "\n"); |
| ad->dma_cb = dma_cb; |
| ad->dma_status |= BM_STATUS_DMAING; |
| dma_cb(s, 0); |
| } |
| |
| static int ahci_dma_prepare_buf(IDEDMA *dma, int is_write) |
| { |
| AHCIDevice *ad = DO_UPCAST(AHCIDevice, dma, dma); |
| IDEState *s = &ad->port.ifs[0]; |
| int i; |
| |
| ahci_populate_sglist(ad, &s->sg); |
| |
| s->io_buffer_size = 0; |
| for (i = 0; i < s->sg.nsg; i++) { |
| s->io_buffer_size += s->sg.sg[i].len; |
| } |
| |
| DPRINTF(ad->port_no, "len=%#x\n", s->io_buffer_size); |
| return s->io_buffer_size != 0; |
| } |
| |
| static int ahci_dma_rw_buf(IDEDMA *dma, int is_write) |
| { |
| AHCIDevice *ad = DO_UPCAST(AHCIDevice, dma, dma); |
| IDEState *s = &ad->port.ifs[0]; |
| uint8_t *p = s->io_buffer + s->io_buffer_index; |
| int l = s->io_buffer_size - s->io_buffer_index; |
| |
| if (ahci_populate_sglist(ad, &s->sg)) { |
| return 0; |
| } |
| |
| if (is_write) { |
| write_to_sglist(p, l, &s->sg); |
| } else { |
| read_from_sglist(p, l, &s->sg); |
| } |
| |
| /* update number of transferred bytes */ |
| ad->cur_cmd->status = cpu_to_le32(le32_to_cpu(ad->cur_cmd->status) + l); |
| s->io_buffer_index += l; |
| |
| DPRINTF(ad->port_no, "len=%#x\n", l); |
| |
| return 1; |
| } |
| |
| static int ahci_dma_set_unit(IDEDMA *dma, int unit) |
| { |
| /* only a single unit per link */ |
| return 0; |
| } |
| |
| static int ahci_dma_add_status(IDEDMA *dma, int status) |
| { |
| AHCIDevice *ad = DO_UPCAST(AHCIDevice, dma, dma); |
| ad->dma_status |= status; |
| DPRINTF(ad->port_no, "set status: %x\n", status); |
| |
| if (status & BM_STATUS_INT) { |
| ahci_trigger_irq(ad->hba, ad, PORT_IRQ_STAT_DSS); |
| } |
| |
| return 0; |
| } |
| |
| static int ahci_dma_set_inactive(IDEDMA *dma) |
| { |
| AHCIDevice *ad = DO_UPCAST(AHCIDevice, dma, dma); |
| |
| DPRINTF(ad->port_no, "dma done\n"); |
| |
| /* update d2h status */ |
| ahci_write_fis_d2h(ad, NULL); |
| |
| ad->dma_cb = NULL; |
| |
| if (!ad->check_bh) { |
| /* maybe we still have something to process, check later */ |
| ad->check_bh = qemu_bh_new(ahci_check_cmd_bh, ad); |
| qemu_bh_schedule(ad->check_bh); |
| } |
| |
| return 0; |
| } |
| |
| static void ahci_irq_set(void *opaque, int n, int level) |
| { |
| } |
| |
| static void ahci_dma_restart_cb(void *opaque, int running, int reason) |
| { |
| } |
| |
| static int ahci_dma_reset(IDEDMA *dma) |
| { |
| return 0; |
| } |
| |
| static const IDEDMAOps ahci_dma_ops = { |
| .start_dma = ahci_start_dma, |
| .start_transfer = ahci_start_transfer, |
| .prepare_buf = ahci_dma_prepare_buf, |
| .rw_buf = ahci_dma_rw_buf, |
| .set_unit = ahci_dma_set_unit, |
| .add_status = ahci_dma_add_status, |
| .set_inactive = ahci_dma_set_inactive, |
| .restart_cb = ahci_dma_restart_cb, |
| .reset = ahci_dma_reset, |
| }; |
| |
| void ahci_init(AHCIState *s, DeviceState *qdev, int ports) |
| { |
| qemu_irq *irqs; |
| int i; |
| |
| s->ports = ports; |
| s->dev = g_malloc0(sizeof(AHCIDevice) * ports); |
| ahci_reg_init(s); |
| /* XXX BAR size should be 1k, but that breaks, so bump it to 4k for now */ |
| memory_region_init_io(&s->mem, &ahci_mem_ops, s, "ahci", 0x1000); |
| irqs = qemu_allocate_irqs(ahci_irq_set, s, s->ports); |
| |
| for (i = 0; i < s->ports; i++) { |
| AHCIDevice *ad = &s->dev[i]; |
| |
| ide_bus_new(&ad->port, qdev, i); |
| ide_init2(&ad->port, irqs[i]); |
| |
| ad->hba = s; |
| ad->port_no = i; |
| ad->port.dma = &ad->dma; |
| ad->port.dma->ops = &ahci_dma_ops; |
| ad->port_regs.cmd = PORT_CMD_SPIN_UP | PORT_CMD_POWER_ON; |
| } |
| } |
| |
| void ahci_uninit(AHCIState *s) |
| { |
| memory_region_destroy(&s->mem); |
| g_free(s->dev); |
| } |
| |
| void ahci_reset(void *opaque) |
| { |
| struct AHCIPCIState *d = opaque; |
| int i; |
| |
| d->ahci.control_regs.irqstatus = 0; |
| d->ahci.control_regs.ghc = 0; |
| |
| for (i = 0; i < d->ahci.ports; i++) { |
| ahci_reset_port(&d->ahci, i); |
| } |
| } |
