[SeaBIOS] [PATCH 2/4] ahci: enable io/mem/dma

[Gerd Hoffmann]

Make sure IO, MMIO and DMA are enabled in pci config space
before using the device.

Signed-off-by: Gerd Hoffmann 
---
 src/ahci.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/src/ahci.c b/src/ahci.c
index ed37b38..b906cc5 100644
--- a/src/ahci.c
+++ b/src/ahci.c
@@ -433,6 +433,7 @@ ahci_init_controller(int bdf)
 {
     struct ahci_ctrl_s *ctrl = malloc_fseg(sizeof(*ctrl));
     u32 val;
+    u16 cmd;

if (!ctrl) {
         warn_noalloc();
@@ -444,6 +445,12 @@ ahci_init_controller(int bdf)
     dprintf(1, "AHCI controller at %02x.%x, iobase %x, irq %d\n",
             bdf >> 3, bdf & 7, ctrl->iobase, ctrl->irq);

+    cmd = pci_config_readw(bdf, PCI_COMMAND);
+    cmd |= PCI_COMMAND_IO;
+    cmd |= PCI_COMMAND_MEMORY;
+    cmd |= PCI_COMMAND_MASTER;
+    pci_config_writew(bdf, PCI_COMMAND, cmd);
+
     val = ahci_ctrl_readl(ctrl, HOST_CTL);
     ahci_ctrl_writel(ctrl, HOST_CTL, val | HOST_CTL_AHCI_EN);