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Allocate 1 MSI/MSI-X vector. Originally jme(4) was designed to

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support multi-queue but the hardware limitation made it hard to
implement supporting multi-queue. Allocating more than necessary
vectors is resource waste and it can be added back when we
implement multi-queue support.
This commit is contained in:
Pyun YongHyeon 2010-11-26 01:58:25 +00:00
parent cd96c3c984
commit 7bcbe6cb58
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=215848
1 changed files with 12 additions and 28 deletions
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40
sys/dev/jme/if_jme.c
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@ -201,13 +201,6 @@ static struct resource_spec jme_irq_spec_legacy[] = {
static struct resource_spec jme_irq_spec_msi[] = {
{ SYS_RES_IRQ, 1, RF_ACTIVE },
{ SYS_RES_IRQ, 2, RF_ACTIVE },
{ SYS_RES_IRQ, 3, RF_ACTIVE },
{ SYS_RES_IRQ, 4, RF_ACTIVE },
{ SYS_RES_IRQ, 5, RF_ACTIVE },
{ SYS_RES_IRQ, 6, RF_ACTIVE },
{ SYS_RES_IRQ, 7, RF_ACTIVE },
{ SYS_RES_IRQ, 8, RF_ACTIVE },
{ -1, 0, 0 }
};
@ -578,11 +571,16 @@ jme_attach(device_t dev)
device_printf(dev, "MSI count : %d\n", msic);
}
/* Use 1 MSI/MSI-X. */
if (msixc > 1)
msixc = 1;
if (msic > 1)
msic = 1;
/* Prefer MSIX over MSI. */
if (msix_disable == 0 || msi_disable == 0) {
if (msix_disable == 0 && msixc == JME_MSIX_MESSAGES &&
if (msix_disable == 0 && msixc > 0 &&
pci_alloc_msix(dev, &msixc) == 0) {
if (msic == JME_MSIX_MESSAGES) {
if (msixc == 1) {
device_printf(dev, "Using %d MSIX messages.\n",
msixc);
sc->jme_flags |= JME_FLAG_MSIX;
@ -591,9 +589,8 @@ jme_attach(device_t dev)
pci_release_msi(dev);
}
if (msi_disable == 0 && (sc->jme_flags & JME_FLAG_MSIX) == 0 &&
msic == JME_MSI_MESSAGES &&
pci_alloc_msi(dev, &msic) == 0) {
if (msic == JME_MSI_MESSAGES) {
msic > 0 && pci_alloc_msi(dev, &msic) == 0) {
if (msic == 1) {
device_printf(dev, "Using %d MSI messages.\n",
msic);
sc->jme_flags |= JME_FLAG_MSI;
@ -786,13 +783,7 @@ jme_attach(device_t dev)
taskqueue_start_threads(&sc->jme_tq, 1, PI_NET, "%s taskq",
device_get_nameunit(sc->jme_dev));
if ((sc->jme_flags & JME_FLAG_MSIX) != 0)
msic = JME_MSIX_MESSAGES;
else if ((sc->jme_flags & JME_FLAG_MSI) != 0)
msic = JME_MSI_MESSAGES;
else
msic = 1;
for (i = 0; i < msic; i++) {
for (i = 0; i < 1; i++) {
error = bus_setup_intr(dev, sc->jme_irq[i],
INTR_TYPE_NET | INTR_MPSAFE, jme_intr, NULL, sc,
&sc->jme_intrhand[i]);
@ -820,7 +811,7 @@ jme_detach(device_t dev)
{
struct jme_softc *sc;
struct ifnet *ifp;
int i, msic;
int i;
sc = device_get_softc(dev);
@ -855,14 +846,7 @@ jme_detach(device_t dev)
sc->jme_ifp = NULL;
}
msic = 1;
if ((sc->jme_flags & JME_FLAG_MSIX) != 0)
msic = JME_MSIX_MESSAGES;
else if ((sc->jme_flags & JME_FLAG_MSI) != 0)
msic = JME_MSI_MESSAGES;
else
msic = 1;
for (i = 0; i < msic; i++) {
for (i = 0; i < 1; i++) {
if (sc->jme_intrhand[i] != NULL) {
bus_teardown_intr(dev, sc->jme_irq[i],
sc->jme_intrhand[i]);