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pcie: Convert pcie_bdf_lookup() to use pcie_scan()

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Use the commmon scanning framework instead of doing a custom brute-force
scan.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
This commit is contained in:
Johan Hedberg 2022-11-18 16:55:58 +02:00 • committed by Carles Cufí
commit e4b8e97c1a
1 changed files with 28 additions and 19 deletions
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47
drivers/pcie/host/pcie.c
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@ -346,29 +346,38 @@ void pcie_irq_enable(pcie_bdf_t bdf, unsigned int irq)
irq_enable(irq);
}
pcie_bdf_t pcie_bdf_lookup(pcie_id_t id)
struct lookup_data {
pcie_bdf_t bdf;
pcie_id_t id;
};
static bool lookup_cb(pcie_bdf_t bdf, pcie_id_t id, void *cb_data)
{
int bus, dev, func;
struct lookup_data *data = cb_data;
for (bus = 0; bus <= PCIE_MAX_BUS; bus++) {
for (dev = 0; dev <= PCIE_MAX_DEV; dev++) {
for (func = 0; func <= PCIE_MAX_FUNC; func++) {
pcie_bdf_t bdf = PCIE_BDF(bus, dev, func);
uint32_t data;
data = pcie_conf_read(bdf, PCIE_CONF_ID);
if (!PCIE_ID_IS_VALID(data)) {
continue;
}
if (data == id) {
return bdf;
}
}
}
if (id == data->id) {
data->bdf = bdf;
return false;
}
return PCIE_BDF_NONE;
return true;
}
pcie_bdf_t pcie_bdf_lookup(pcie_id_t id)
{
struct lookup_data data = {
.bdf = PCIE_BDF_NONE,
.id = id,
};
struct pcie_scan_opt opt = {
.cb = lookup_cb,
.cb_data = &data,
.flags = (PCIE_SCAN_RECURSIVE | PCIE_SCAN_CB_ALL),
};
pcie_scan(&opt);
return data.bdf;
}
static bool scan_flag(const struct pcie_scan_opt *opt, uint32_t flag)