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ide/ahci: Use universal DMA helper functions

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The AHCI device can provide both PCI and SysBus AHCI device
emulations.  For this reason, it wasn't previously converted to use
the pci_dma_*() helper functions.  Now that we have universal DMA
helper functions, this converts AHCI to use them.

The DMAContext is obtained from pci_dma_context() in the PCI case and
set to NULL in the SysBus case (i.e. we assume for now that a SysBus
AHCI has no IOMMU translation).

Cc: Kevin Wolf <kwolf@redhat.com>
Cc: Michael S. Tsirkin <mst@redhat.com>

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
David Gibson 2012-06-27 14:50:41 +10:00 committed by Anthony Liguori
parent c65bcef306
commit 10ca2943aa
3 changed files with 23 additions and 16 deletions
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34
hw/ide/ahci.c
View file

@ -588,7 +588,7 @@ 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;
dma_addr_t cmd_len = 0x80;
int cmd_mapped = 0;
if (!ad->res_fis || !(pr->cmd & PORT_CMD_FIS_RX)) {
@ -598,7 +598,8 @@ static void ahci_write_fis_d2h(AHCIDevice *ad, uint8_t *cmd_fis)
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_fis = dma_memory_map(ad->hba->dma, tbl_addr, &cmd_len,
DMA_DIRECTION_TO_DEVICE);
cmd_mapped = 1;
}
@ -630,7 +631,8 @@ static void ahci_write_fis_d2h(AHCIDevice *ad, uint8_t *cmd_fis)
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);
dma_memory_unmap(ad->hba->dma, cmd_fis, cmd_len,
DMA_DIRECTION_TO_DEVICE, cmd_len);
}
}
@ -640,8 +642,8 @@ static int ahci_populate_sglist(AHCIDevice *ad, QEMUSGList *sglist)
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;
dma_addr_t prdt_len = (sglist_alloc_hint * sizeof(AHCI_SG));
dma_addr_t real_prdt_len = prdt_len;
uint8_t *prdt;
int i;
int r = 0;
@ -652,7 +654,8 @@ static int ahci_populate_sglist(AHCIDevice *ad, QEMUSGList *sglist)
}
/* map PRDT */
if (!(prdt = cpu_physical_memory_map(prdt_addr, &prdt_len, 0))){
if (!(prdt = dma_memory_map(ad->hba->dma, prdt_addr, &prdt_len,
DMA_DIRECTION_TO_DEVICE))){
DPRINTF(ad->port_no, "map failed\n");
return -1;
}
@ -667,8 +670,7 @@ static int ahci_populate_sglist(AHCIDevice *ad, QEMUSGList *sglist)
if (sglist_alloc_hint > 0) {
AHCI_SG *tbl = (AHCI_SG *)prdt;
/* FIXME: pass the correct DMAContext */
qemu_sglist_init(sglist, sglist_alloc_hint, NULL);
qemu_sglist_init(sglist, sglist_alloc_hint, ad->hba->dma);
for (i = 0; i < sglist_alloc_hint; i++) {
/* flags_size is zero-based */
qemu_sglist_add(sglist, le64_to_cpu(tbl[i].addr),
@ -677,7 +679,8 @@ static int ahci_populate_sglist(AHCIDevice *ad, QEMUSGList *sglist)
}
out:
cpu_physical_memory_unmap(prdt, prdt_len, 0, prdt_len);
dma_memory_unmap(ad->hba->dma, prdt, prdt_len,
DMA_DIRECTION_TO_DEVICE, prdt_len);
return r;
}
@ -787,7 +790,7 @@ static int handle_cmd(AHCIState *s, int port, int slot)
uint64_t tbl_addr;
AHCICmdHdr *cmd;
uint8_t *cmd_fis;
target_phys_addr_t cmd_len;
dma_addr_t cmd_len;
if (s->dev[port].port.ifs[0].status & (BUSY_STAT|DRQ_STAT)) {
/* Engine currently busy, try again later */
@ -809,7 +812,8 @@ static int handle_cmd(AHCIState *s, int port, int slot)
tbl_addr = le64_to_cpu(cmd->tbl_addr);
cmd_len = 0x80;
cmd_fis = cpu_physical_memory_map(tbl_addr, &cmd_len, 1);
cmd_fis = dma_memory_map(s->dma, tbl_addr, &cmd_len,
DMA_DIRECTION_FROM_DEVICE);
if (!cmd_fis) {
DPRINTF(port, "error: guest passed us an invalid cmd fis\n");
@ -935,7 +939,8 @@ static int handle_cmd(AHCIState *s, int port, int slot)
}
out:
cpu_physical_memory_unmap(cmd_fis, cmd_len, 1, cmd_len);
dma_memory_unmap(s->dma, cmd_fis, cmd_len, DMA_DIRECTION_FROM_DEVICE,
cmd_len);
if (s->dev[port].port.ifs[0].status & (BUSY_STAT|DRQ_STAT)) {
/* async command, complete later */
@ -1115,11 +1120,12 @@ static const IDEDMAOps ahci_dma_ops = {
.reset = ahci_dma_reset,
};
void ahci_init(AHCIState *s, DeviceState *qdev, int ports)
void ahci_init(AHCIState *s, DeviceState *qdev, DMAContext *dma, int ports)
{
qemu_irq *irqs;
int i;
s->dma = dma;
s->ports = ports;
s->dev = g_malloc0(sizeof(AHCIDevice) * ports);
ahci_reg_init(s);
@ -1188,7 +1194,7 @@ static void sysbus_ahci_reset(DeviceState *dev)
static int sysbus_ahci_init(SysBusDevice *dev)
{
SysbusAHCIState *s = FROM_SYSBUS(SysbusAHCIState, dev);
ahci_init(&s->ahci, &dev->qdev, s->num_ports);
ahci_init(&s->ahci, &dev->qdev, NULL, s->num_ports);
sysbus_init_mmio(dev, &s->ahci.mem);
sysbus_init_irq(dev, &s->ahci.irq);

3
hw/ide/ahci.h
View file

@ -299,6 +299,7 @@ typedef struct AHCIState {
uint32_t idp_index; /* Current IDP index */
int ports;
qemu_irq irq;
DMAContext *dma;
} AHCIState;
typedef struct AHCIPCIState {
@ -329,7 +330,7 @@ typedef struct NCQFrame {
uint8_t reserved10;
} QEMU_PACKED NCQFrame;
void ahci_init(AHCIState *s, DeviceState *qdev, int ports);
void ahci_init(AHCIState *s, DeviceState *qdev, DMAContext *dma, int ports);
void ahci_uninit(AHCIState *s);
void ahci_reset(AHCIState *s);

2
hw/ide/ich.c
View file

@ -98,7 +98,7 @@ static int pci_ich9_ahci_init(PCIDevice *dev)
uint8_t *sata_cap;
d = DO_UPCAST(struct AHCIPCIState, card, dev);
ahci_init(&d->ahci, &dev->qdev, 6);
ahci_init(&d->ahci, &dev->qdev, pci_dma_context(dev), 6);
pci_config_set_prog_interface(d->card.config, AHCI_PROGMODE_MAJOR_REV_1);