OpenE2K/qemu-e2k
13
4
Fork 0
Code Issues 4 Pull Requests Projects 2 Releases Activity

ahci: clean up initial d2h semantics

Browse Source 
with write_fis_d2h and signature generation tidied up,
let's adjust the initial d2h semantics to make more sense.

The initial d2h is considered delivered if there is guest
memory to save it to.

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 1441140641-17631-5-git-send-email-jsnow@redhat.com
This commit is contained in:
John Snow 2015-09-01 16:50:41 -04:00
parent 28ee82557c
commit e47f9eb148
1 changed files with 16 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
hw/ide/ahci.c
View File

@ -46,7 +46,7 @@ do { \
static void check_cmd(AHCIState *s, int port);
static int handle_cmd(AHCIState *s, int port, uint8_t slot);
static void ahci_reset_port(AHCIState *s, int port);
static void ahci_write_fis_d2h(AHCIDevice *ad);
static bool ahci_write_fis_d2h(AHCIDevice *ad);
static void ahci_init_d2h(AHCIDevice *ad);
static int ahci_dma_prepare_buf(IDEDMA *dma, int32_t limit);
static bool ahci_map_clb_address(AHCIDevice *ad);
@ -295,7 +295,6 @@ static void ahci_port_write(AHCIState *s, int port, int offset, uint32_t val)
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 = true;
}
check_cmd(s, port);
@ -541,14 +540,19 @@ static void ahci_init_d2h(AHCIDevice *ad)
IDEState *ide_state = &ad->port.ifs[0];
AHCIPortRegs *pr = &ad->port_regs;
/* We're emulating receiving the first Reg H2D Fis from the device;
* Update the SIG register, but otherwise proceed as normal. */
pr->sig = (ide_state->hcyl << 24) |
(ide_state->lcyl << 16) |
(ide_state->sector << 8) |
(ide_state->nsector & 0xFF);
if (ad->init_d2h_sent) {
return;
}
ahci_write_fis_d2h(ad);
if (ahci_write_fis_d2h(ad)) {
ad->init_d2h_sent = true;
/* We're emulating receiving the first Reg H2D Fis from the device;
* Update the SIG register, but otherwise proceed as normal. */
pr->sig = (ide_state->hcyl << 24) |
(ide_state->lcyl << 16) |
(ide_state->sector << 8) |
(ide_state->nsector & 0xFF);
}
}
static void ahci_set_signature(AHCIDevice *ad, uint32_t sig)
@ -750,7 +754,7 @@ static void ahci_write_fis_pio(AHCIDevice *ad, uint16_t len)
ahci_trigger_irq(ad->hba, ad, PORT_IRQ_PIOS_FIS);
}
static void ahci_write_fis_d2h(AHCIDevice *ad)
static bool ahci_write_fis_d2h(AHCIDevice *ad)
{
AHCIPortRegs *pr = &ad->port_regs;
uint8_t *d2h_fis;
@ -758,7 +762,7 @@ static void ahci_write_fis_d2h(AHCIDevice *ad)
IDEState *s = &ad->port.ifs[0];
if (!ad->res_fis || !(pr->cmd & PORT_CMD_FIS_RX)) {
return;
return false;
}
d2h_fis = &ad->res_fis[RES_FIS_RFIS];
@ -791,6 +795,7 @@ static void ahci_write_fis_d2h(AHCIDevice *ad)
}
ahci_trigger_irq(ad->hba, ad, PORT_IRQ_D2H_REG_FIS);
return true;
}
static int prdt_tbl_entry_size(const AHCI_SG *tbl)