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ahci: more fixes

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Matheus
2026-03-01 23:43:32 -03:00
parent f1482afd4a
commit 9e4900d531
1 changed files with 17 additions and 23 deletions
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kernel-src/io/block/ahci.c
+17 -23
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@@ -75,15 +75,6 @@ typedef struct {
#define IE_HBFE (1 << 29)
#define IE_TFE (1 << 30)
typedef struct {
uint16_t flags;
uint16_t prdtl;
uint32_t prdbc;
uint32_t addr_lo;
uint32_t addr_high;
uint32_t reserved[4];
} __attribute__((packed)) command_list;
#define FIS_TYPE_H2D 0x27
typedef struct {
@@ -183,15 +174,15 @@ void ahci_dpc(context_t *, dpcarg_t arg) {
if (error_happened) {
// an error happened, restart the port and notify last waiter
uint32_t ci = port_data->ahci->ports[port].ci;
port_data->ahci->ports[port].cmd &= ~CMD_ST;
while (port_data->ahci->ports[port].cmd & CMD_CR) CPU_PAUSE();
port_data->ahci->ports[port].cmd &= ~(CMD_ST | CMD_FRE);
while (port_data->ahci->ports[port].cmd & (CMD_CR | CMD_FR)) CPU_PAUSE();
port_data->ahci->ports[port].serr = port_data->ahci->ports[port].serr;
__assert((port_data->ahci->ports[port].tfd & (TFD_BSY | TFD_DRQ)) == 0);
__assert((port_data->ahci->ports[port].tfd & (TFD_BSY | TFD_DRQ)) == 0); // handling this is a TODO
// find errored out slot
for (
error_slot = port_data->command_waiting;
(port_data->ahci->ports[port].ci & (1 << error_slot)) == 0;
(ci & (1 << error_slot)) == 0;
error_slot = (error_slot + 1) % cmd_slots
);
@@ -199,7 +190,10 @@ void ahci_dpc(context_t *, dpcarg_t arg) {
ci &= ~(1 << error_slot);
// enable command processing again
port_data->ahci->ports[port].cmd |= CMD_FRE;
while ((port_data->ahci->ports[port].cmd & CMD_FR) == 0) CPU_PAUSE();
port_data->ahci->ports[port].cmd |= CMD_ST;
while ((port_data->ahci->ports[port].cmd & CMD_CR) == 0) CPU_PAUSE();
// resend commands
for (int slot = port_data->command_waiting; port_data->waiters[slot]; slot = (slot + 1) % cmd_slots) {
@@ -232,6 +226,9 @@ void ahci_isr(isr_t *isr, context_t *) {
return;
for (int i = __builtin_ctz(ports_pending); ports_pending; i = __builtin_ctz(ports_pending)) {
if (ahci->port_data[i] == NULL)
continue;
dpc_enqueue(&ahci->port_data[i]->dpc, ahci_dpc, ahci->port_data[i]);
ports_pending &= ~(1 << i);
@@ -309,11 +306,10 @@ static int setup_prdt(iovec_iterator_t *iterator, command_table_t *command_table
return EINVAL;
}
command_table->prdt[prdt_done].base_low = (uintptr_t)page & 0xffffffff;
command_table->prdt[prdt_done].base_high = ((uintptr_t)page >> 32) & 0xffffffff;
command_table->prdt[prdt_done].byte_count_and_flags = page_remaining - 1;
size_t blocks_in_page = min(page_remaining / 512, *requested_size - block_done);
command_table->prdt[prdt_done].base_low = ((uintptr_t)page + page_offset) & 0xffffffff;
command_table->prdt[prdt_done].base_high = (((uintptr_t)page + page_offset) >> 32) & 0xffffffff;
command_table->prdt[prdt_done].byte_count_and_flags = blocks_in_page * 512 - 1;
// if we didnt use the whole space in the page, set the iterator back a bit
size_t diff_between_available_and_used = page_remaining - blocks_in_page * 512;
@@ -452,12 +448,10 @@ static void init_controller(pcienum_t *pci_enum) {
pcibar_t pci_bar = pci_getbar(pci_enum, 5);
__assert(pci_bar.mmio);
if (pci_enum->msix.exists) {
pci_initmsix(pci_enum);
} else if (pci_enum->msi.exists) {
if (pci_enum->msi.exists) {
pci_initmsi(pci_enum, 1);
} else {
printf("ahci: no support for msi-x or msi\n");
printf("ahci: no support for msi\n");
return;
}
@@ -587,7 +581,7 @@ static void init_controller(pcienum_t *pci_enum) {
// mask all irqs and clear irq status
ahci->ports[i].ie = 0;
ahci->ports[i].is = 0;
ahci->ports[i].is = ahci->ports[i].is;
// enable FIS receive
ahci->ports[i].cmd |= CMD_FRE;
@@ -621,7 +615,7 @@ static void init_controller(pcienum_t *pci_enum) {
pmm_release(fis_base_mem);
// clear global interrupt status
ahci->ghc->is = 0;
ahci->ghc->is = ahci->ghc->is;
// configure interrupts for each port
FOR_EACH_PORT(ahci) {