Author: cem
Date: Wed Oct 14 23:46:15 2015
New Revision: 289342
URL: https://svnweb.freebsd.org/changeset/base/289342
Log:
NTB: MFV 53a788a7: Split ntb_setup_interrupts() into SOC, Xeon, and legacy
routines
The names don't line up 100% with Linux. Our routines are named
ntb_setup_interrupts, ntb_setup_xeon_msix, ntb_setup_soc_msix, and
ntb_setup_legacy_interrupt. Linux SNB = FreeBSD Xeon; Linux BWD =
FreeBSD SOC. Original Linux commit log:
This is an cleanup effort to make ntb_setup_msix() more readable - use
ntb_setup_bwd_msix() to init MSI-Xs on BWD hardware and
ntb_setup_snb_msix() - on SNB hardware.
Function ntb_setup_snb_msix() also initializes MSI-Xs the way it should
has been done - looping pci_enable_msix() until success or failure.
Authored by: Alexander Gordeev
Obtained from: Linux (Dual BSD/GPL driver)
Sponsored by: EMC / Isilon Storage Division
Modified:
head/sys/dev/ntb/ntb_hw/ntb_hw.c
Modified: head/sys/dev/ntb/ntb_hw/ntb_hw.c
==============================================================================
--- head/sys/dev/ntb/ntb_hw/ntb_hw.c Wed Oct 14 23:45:35 2015
(r289341)
+++ head/sys/dev/ntb/ntb_hw/ntb_hw.c Wed Oct 14 23:46:15 2015
(r289342)
@@ -200,6 +200,9 @@ static int map_memory_window_bar(struct
struct ntb_pci_bar_info *bar);
static void ntb_unmap_pci_bar(struct ntb_softc *ntb);
static int ntb_setup_interrupts(struct ntb_softc *ntb);
+static int ntb_setup_legacy_interrupt(struct ntb_softc *ntb);
+static int ntb_setup_xeon_msix(struct ntb_softc *ntb, uint32_t num_vectors);
+static int ntb_setup_soc_msix(struct ntb_softc *ntb, uint32_t num_vectors);
static void ntb_teardown_interrupts(struct ntb_softc *ntb);
static void handle_soc_irq(void *arg);
static void handle_xeon_irq(void *arg);
@@ -208,7 +211,7 @@ static void ntb_handle_legacy_interrupt(
static void ntb_irq_work(void *arg);
static void mask_ldb_interrupt(struct ntb_softc *ntb, unsigned int idx);
static void unmask_ldb_interrupt(struct ntb_softc *ntb, unsigned int idx);
-static int ntb_create_callbacks(struct ntb_softc *ntb, int num_vectors);
+static int ntb_create_callbacks(struct ntb_softc *ntb, uint32_t num_vectors);
static void ntb_free_callbacks(struct ntb_softc *ntb);
static struct ntb_hw_info *ntb_get_device_info(uint32_t device_id);
static int ntb_setup_xeon(struct ntb_softc *ntb);
@@ -473,13 +476,79 @@ ntb_unmap_pci_bar(struct ntb_softc *ntb)
}
static int
-ntb_setup_interrupts(struct ntb_softc *ntb)
+ntb_setup_xeon_msix(struct ntb_softc *ntb, uint32_t num_vectors)
{
void (*interrupt_handler)(void *);
void *int_arg;
- bool use_msix = false;
+ uint32_t i;
+ int rc;
+
+ if (num_vectors < 4)
+ return (ENOSPC);
+
+ for (i = 0; i < num_vectors; i++) {
+ ntb->int_info[i].rid = i + 1;
+ ntb->int_info[i].res = bus_alloc_resource_any(ntb->device,
+ SYS_RES_IRQ, &ntb->int_info[i].rid, RF_ACTIVE);
+ if (ntb->int_info[i].res == NULL) {
+ device_printf(ntb->device,
+ "bus_alloc_resource failed\n");
+ return (ENOMEM);
+ }
+ ntb->int_info[i].tag = NULL;
+ ntb->allocated_interrupts++;
+ if (i == num_vectors - 1) {
+ interrupt_handler = handle_xeon_event_irq;
+ int_arg = ntb;
+ } else {
+ interrupt_handler = handle_xeon_irq;
+ int_arg = &ntb->db_cb[i];
+ }
+ rc = bus_setup_intr(ntb->device, ntb->int_info[i].res,
+ INTR_MPSAFE | INTR_TYPE_MISC, NULL, interrupt_handler,
+ int_arg, &ntb->int_info[i].tag);
+ if (rc != 0) {
+ device_printf(ntb->device,
+ "bus_setup_intr failed\n");
+ return (ENXIO);
+ }
+ }
+ return (0);
+}
+
+static int
+ntb_setup_soc_msix(struct ntb_softc *ntb, uint32_t num_vectors)
+{
+ uint32_t i;
+ int rc;
+
+ for (i = 0; i < num_vectors; i++) {
+ ntb->int_info[i].rid = i + 1;
+ ntb->int_info[i].res = bus_alloc_resource_any(ntb->device,
+ SYS_RES_IRQ, &ntb->int_info[i].rid, RF_ACTIVE);
+ if (ntb->int_info[i].res == NULL) {
+ device_printf(ntb->device,
+ "bus_alloc_resource failed\n");
+ return (ENOMEM);
+ }
+ ntb->int_info[i].tag = NULL;
+ ntb->allocated_interrupts++;
+ rc = bus_setup_intr(ntb->device, ntb->int_info[i].res,
+ INTR_MPSAFE | INTR_TYPE_MISC, NULL, handle_soc_irq,
+ &ntb->db_cb[i], &ntb->int_info[i].tag);
+ if (rc != 0) {
+ device_printf(ntb->device, "bus_setup_intr failed\n");
+ return (ENXIO);
+ }
+ }
+ return (0);
+}
+
+static int
+ntb_setup_interrupts(struct ntb_softc *ntb)
+{
uint32_t num_vectors;
- int i;
+ int rc;
ntb->allocated_interrupts = 0;
/*
@@ -494,69 +563,47 @@ ntb_setup_interrupts(struct ntb_softc *n
num_vectors = MIN(pci_msix_count(ntb->device),
ntb->limits.max_db_bits);
- if (num_vectors >= 1) {
+ if (num_vectors >= 1)
pci_alloc_msix(ntb->device, &num_vectors);
- if (num_vectors >= 4)
- use_msix = true;
- }
ntb_create_callbacks(ntb, num_vectors);
- if (use_msix == true) {
- for (i = 0; i < num_vectors; i++) {
- ntb->int_info[i].rid = i + 1;
- ntb->int_info[i].res = bus_alloc_resource_any(
- ntb->device, SYS_RES_IRQ, &ntb->int_info[i].rid,
- RF_ACTIVE);
- if (ntb->int_info[i].res == NULL) {
- device_printf(ntb->device,
- "bus_alloc_resource failed\n");
- return (ENOMEM);
- }
- ntb->int_info[i].tag = NULL;
- ntb->allocated_interrupts++;
- if (ntb->type == NTB_SOC) {
- interrupt_handler = handle_soc_irq;
- int_arg = &ntb->db_cb[i];
- } else {
- if (i == num_vectors - 1) {
- interrupt_handler =
- handle_xeon_event_irq;
- int_arg = ntb;
- } else {
- interrupt_handler =
- handle_xeon_irq;
- int_arg = &ntb->db_cb[i];
- }
- }
- if (bus_setup_intr(ntb->device, ntb->int_info[i].res,
- INTR_MPSAFE | INTR_TYPE_MISC, NULL,
- interrupt_handler, int_arg,
- &ntb->int_info[i].tag) != 0) {
- device_printf(ntb->device,
- "bus_setup_intr failed\n");
- return (ENXIO);
- }
- }
- } else {
- ntb->int_info[0].rid = 0;
- ntb->int_info[0].res = bus_alloc_resource_any(ntb->device,
- SYS_RES_IRQ, &ntb->int_info[0].rid, RF_SHAREABLE|RF_ACTIVE);
- interrupt_handler = ntb_handle_legacy_interrupt;
- if (ntb->int_info[0].res == NULL) {
- device_printf(ntb->device,
- "bus_alloc_resource failed\n");
- return (ENOMEM);
- }
- ntb->int_info[0].tag = NULL;
- ntb->allocated_interrupts = 1;
- if (bus_setup_intr(ntb->device, ntb->int_info[0].res,
- INTR_MPSAFE | INTR_TYPE_MISC, NULL,
- interrupt_handler, ntb, &ntb->int_info[0].tag) != 0) {
+ if (ntb->type == NTB_XEON)
+ rc = ntb_setup_xeon_msix(ntb, num_vectors);
+ else
+ rc = ntb_setup_soc_msix(ntb, num_vectors);
+ if (rc != 0)
+ device_printf(ntb->device,
+ "Error allocating MSI-X interrupts: %d\n", rc);
+
+ if (ntb->type == NTB_XEON && rc == ENOSPC)
+ rc = ntb_setup_legacy_interrupt(ntb);
- device_printf(ntb->device, "bus_setup_intr failed\n");
- return (ENXIO);
- }
+ return (rc);
+}
+
+static int
+ntb_setup_legacy_interrupt(struct ntb_softc *ntb)
+{
+ int rc;
+
+ ntb->int_info[0].rid = 0;
+ ntb->int_info[0].res = bus_alloc_resource_any(ntb->device, SYS_RES_IRQ,
+ &ntb->int_info[0].rid, RF_SHAREABLE|RF_ACTIVE);
+ if (ntb->int_info[0].res == NULL) {
+ device_printf(ntb->device, "bus_alloc_resource failed\n");
+ return (ENOMEM);
+ }
+
+ ntb->int_info[0].tag = NULL;
+ ntb->allocated_interrupts = 1;
+
+ rc = bus_setup_intr(ntb->device, ntb->int_info[0].res,
+ INTR_MPSAFE | INTR_TYPE_MISC, NULL, ntb_handle_legacy_interrupt,
+ ntb, &ntb->int_info[0].tag);
+ if (rc != 0) {
+ device_printf(ntb->device, "bus_setup_intr failed\n");
+ return (ENXIO);
}
return (0);
@@ -688,9 +735,9 @@ ntb_handle_legacy_interrupt(void *arg)
}
static int
-ntb_create_callbacks(struct ntb_softc *ntb, int num_vectors)
+ntb_create_callbacks(struct ntb_softc *ntb, uint32_t num_vectors)
{
- int i;
+ uint32_t i;
ntb->db_cb = malloc(num_vectors * sizeof(*ntb->db_cb), M_NTB,
M_ZERO | M_WAITOK);
@@ -705,7 +752,7 @@ ntb_create_callbacks(struct ntb_softc *n
static void
ntb_free_callbacks(struct ntb_softc *ntb)
{
- int i;
+ uint8_t i;
for (i = 0; i < ntb->limits.max_db_bits; i++)
ntb_unregister_db_callback(ntb, i);
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