@@ -693,7 +693,7 @@ void xhci_debugfs_init(struct xhci_hcd *xhci)
"command-ring",
xhci->debugfs_root);
- xhci_debugfs_create_ring_dir(xhci, &xhci->interrupter->event_ring,
+ xhci_debugfs_create_ring_dir(xhci, &xhci->interrupters[0]->event_ring,
"event-ring",
xhci->debugfs_root);
@@ -1846,6 +1846,31 @@ xhci_free_interrupter(struct xhci_hcd *xhci, struct xhci_interrupter *ir)
kfree(ir);
}
+void xhci_remove_secondary_interrupter(struct usb_hcd *hcd, struct xhci_interrupter *ir)
+{
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+ unsigned int intr_num;
+
+ /* interrupter 0 is primary interrupter, don't touch it */
+ if (!ir || !ir->intr_num || ir->intr_num >= xhci->max_interrupters)
+ xhci_dbg(xhci, "Invalid secondary interrupter, can't remove\n");
+
+ /* fixme, should we check xhci->interrupter[intr_num] == ir */
+ /* fixme locking */
+
+ spin_lock_irq(&xhci->lock);
+
+ intr_num = ir->intr_num;
+
+ xhci_remove_interrupter(xhci, ir);
+ xhci->interrupters[intr_num] = NULL;
+
+ spin_unlock_irq(&xhci->lock);
+
+ xhci_free_interrupter(xhci, ir);
+}
+EXPORT_SYMBOL_GPL(xhci_remove_secondary_interrupter);
+
void xhci_mem_cleanup(struct xhci_hcd *xhci)
{
struct device *dev = xhci_to_hcd(xhci)->self.sysdev;
@@ -1853,10 +1878,14 @@ void xhci_mem_cleanup(struct xhci_hcd *xhci)
cancel_delayed_work_sync(&xhci->cmd_timer);
- xhci_remove_interrupter(xhci, xhci->interrupter);
- xhci_free_interrupter(xhci, xhci->interrupter);
- xhci->interrupter = NULL;
- xhci_dbg_trace(xhci, trace_xhci_dbg_init, "Freed primary event ring");
+ for (i = 0; i < xhci->max_interrupters; i++) {
+ if (xhci->interrupters[i]) {
+ xhci_remove_interrupter(xhci, xhci->interrupters[i]);
+ xhci_free_interrupter(xhci, xhci->interrupters[i]);
+ xhci->interrupters[i] = NULL;
+ }
+ }
+ xhci_dbg_trace(xhci, trace_xhci_dbg_init, "Freed interrupters");
if (xhci->cmd_ring)
xhci_ring_free(xhci, xhci->cmd_ring);
@@ -1926,6 +1955,7 @@ void xhci_mem_cleanup(struct xhci_hcd *xhci)
for (i = 0; i < xhci->num_port_caps; i++)
kfree(xhci->port_caps[i].psi);
kfree(xhci->port_caps);
+ kfree(xhci->interrupters);
xhci->num_port_caps = 0;
xhci->usb2_rhub.ports = NULL;
@@ -1934,6 +1964,7 @@ void xhci_mem_cleanup(struct xhci_hcd *xhci)
xhci->rh_bw = NULL;
xhci->ext_caps = NULL;
xhci->port_caps = NULL;
+ xhci->interrupters = NULL;
xhci->page_size = 0;
xhci->page_shift = 0;
@@ -2286,6 +2317,13 @@ xhci_add_interrupter(struct xhci_hcd *xhci, struct xhci_interrupter *ir,
return -EINVAL;
}
+ if (xhci->interrupters[intr_num]) {
+ xhci_warn(xhci, "Interrupter %d\n already set up", intr_num);
+ return -EINVAL;
+ }
+
+ xhci->interrupters[intr_num] = ir;
+ ir->intr_num = intr_num;
ir->ir_set = &xhci->run_regs->ir_set[intr_num];
/* set ERST count with the number of entries in the segment table */
@@ -2305,10 +2343,52 @@ xhci_add_interrupter(struct xhci_hcd *xhci, struct xhci_interrupter *ir,
return 0;
}
+struct xhci_interrupter *
+xhci_create_secondary_interrupter(struct usb_hcd *hcd)
+{
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+ struct xhci_interrupter *ir;
+ unsigned int i;
+ int err = -ENOSPC;
+
+ if (!xhci->interrupters)
+ return NULL;
+
+ ir = xhci_alloc_interrupter(xhci, GFP_KERNEL);
+ if (!ir)
+ return NULL;
+
+ spin_lock_irq(&xhci->lock);
+
+ /* Find available secondary interrupter, interrupter 0 is reserved for primary */
+ for (i = 1; i < xhci->max_interrupters; i++) {
+ if (xhci->interrupters[i] == NULL) {
+ err = xhci_add_interrupter(xhci, ir, i);
+ break;
+ }
+ }
+
+ spin_unlock_irq(&xhci->lock);
+
+ if (err) {
+ xhci_warn(xhci, "Failed to add secondary interrupter, max interrupters %d\n",
+ xhci->max_interrupters);
+ xhci_free_interrupter(xhci, ir);
+ return NULL;
+ }
+
+ xhci_dbg(xhci, "Add secondary interrupter %d, max interrupters %d\n",
+ i, xhci->max_interrupters);
+
+ return ir;
+}
+EXPORT_SYMBOL_GPL(xhci_create_secondary_interrupter);
+
int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags)
{
- dma_addr_t dma;
+ struct xhci_interrupter *ir;
struct device *dev = xhci_to_hcd(xhci)->self.sysdev;
+ dma_addr_t dma;
unsigned int val, val2;
u64 val_64;
u32 page_size, temp;
@@ -2432,11 +2512,14 @@ int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags)
/* Allocate and set up primary interrupter 0 with an event ring. */
xhci_dbg_trace(xhci, trace_xhci_dbg_init,
"Allocating primary event ring");
- xhci->interrupter = xhci_alloc_interrupter(xhci, flags);
- if (!xhci->interrupter)
+ xhci->interrupters = kcalloc_node(xhci->max_interrupters, sizeof(*xhci->interrupters),
+ flags, dev_to_node(dev));
+
+ ir = xhci_alloc_interrupter(xhci, flags);
+ if (!ir)
goto fail;
- if (xhci_add_interrupter(xhci, xhci->interrupter, 0))
+ if (xhci_add_interrupter(xhci, ir, 0))
goto fail;
xhci->isoc_bei_interval = AVOID_BEI_INTERVAL_MAX;
@@ -3076,7 +3076,7 @@ irqreturn_t xhci_irq(struct usb_hcd *hcd)
writel(status, &xhci->op_regs->status);
/* This is the handler of the primary interrupter */
- ir = xhci->interrupter;
+ ir = xhci->interrupters[0];
if (!hcd->msi_enabled) {
u32 irq_pending;
irq_pending = readl(&ir->ir_set->irq_pending);
@@ -456,7 +456,7 @@ static int xhci_init(struct usb_hcd *hcd)
static int xhci_run_finished(struct xhci_hcd *xhci)
{
- struct xhci_interrupter *ir = xhci->interrupter;
+ struct xhci_interrupter *ir = xhci->interrupters[0];
unsigned long flags;
u32 temp;
@@ -508,7 +508,7 @@ int xhci_run(struct usb_hcd *hcd)
u64 temp_64;
int ret;
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
- struct xhci_interrupter *ir = xhci->interrupter;
+ struct xhci_interrupter *ir = xhci->interrupters[0];
/* Start the xHCI host controller running only after the USB 2.0 roothub
* is setup.
*/
@@ -572,7 +572,7 @@ void xhci_stop(struct usb_hcd *hcd)
{
u32 temp;
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
- struct xhci_interrupter *ir = xhci->interrupter;
+ struct xhci_interrupter *ir = xhci->interrupters[0];
mutex_lock(&xhci->mutex);
@@ -668,36 +668,51 @@ EXPORT_SYMBOL_GPL(xhci_shutdown);
#ifdef CONFIG_PM
static void xhci_save_registers(struct xhci_hcd *xhci)
{
- struct xhci_interrupter *ir = xhci->interrupter;
+ struct xhci_interrupter *ir;
+ unsigned int i;
xhci->s3.command = readl(&xhci->op_regs->command);
xhci->s3.dev_nt = readl(&xhci->op_regs->dev_notification);
xhci->s3.dcbaa_ptr = xhci_read_64(xhci, &xhci->op_regs->dcbaa_ptr);
xhci->s3.config_reg = readl(&xhci->op_regs->config_reg);
- if (!ir)
- return;
+ /* save both primary and all secondary interrupters */
+ /* fixme, shold we lock to prevent race with remove secondary interrupter? */
+ for (i = 0; i < xhci->max_interrupters; i++) {
+ ir = xhci->interrupters[i];
+ if (!ir)
+ continue;
- ir->s3_erst_size = readl(&ir->ir_set->erst_size);
- ir->s3_erst_base = xhci_read_64(xhci, &ir->ir_set->erst_base);
- ir->s3_erst_dequeue = xhci_read_64(xhci, &ir->ir_set->erst_dequeue);
- ir->s3_irq_pending = readl(&ir->ir_set->irq_pending);
- ir->s3_irq_control = readl(&ir->ir_set->irq_control);
+ ir->s3_erst_size = readl(&ir->ir_set->erst_size);
+ ir->s3_erst_base = xhci_read_64(xhci, &ir->ir_set->erst_base);
+ ir->s3_erst_dequeue = xhci_read_64(xhci, &ir->ir_set->erst_dequeue);
+ ir->s3_irq_pending = readl(&ir->ir_set->irq_pending);
+ ir->s3_irq_control = readl(&ir->ir_set->irq_control);
+ }
}
static void xhci_restore_registers(struct xhci_hcd *xhci)
{
- struct xhci_interrupter *ir = xhci->interrupter;
+ struct xhci_interrupter *ir;
+ unsigned int i;
writel(xhci->s3.command, &xhci->op_regs->command);
writel(xhci->s3.dev_nt, &xhci->op_regs->dev_notification);
xhci_write_64(xhci, xhci->s3.dcbaa_ptr, &xhci->op_regs->dcbaa_ptr);
writel(xhci->s3.config_reg, &xhci->op_regs->config_reg);
- writel(ir->s3_erst_size, &ir->ir_set->erst_size);
- xhci_write_64(xhci, ir->s3_erst_base, &ir->ir_set->erst_base);
- xhci_write_64(xhci, ir->s3_erst_dequeue, &ir->ir_set->erst_dequeue);
- writel(ir->s3_irq_pending, &ir->ir_set->irq_pending);
- writel(ir->s3_irq_control, &ir->ir_set->irq_control);
+
+ /* FIXME should we lock to protect against freeing of interrupters */
+ for (i = 0; i < xhci->max_interrupters; i++) {
+ ir = xhci->interrupters[i];
+ if (!ir)
+ continue;
+
+ writel(ir->s3_erst_size, &ir->ir_set->erst_size);
+ xhci_write_64(xhci, ir->s3_erst_base, &ir->ir_set->erst_base);
+ xhci_write_64(xhci, ir->s3_erst_dequeue, &ir->ir_set->erst_dequeue);
+ writel(ir->s3_irq_pending, &ir->ir_set->irq_pending);
+ writel(ir->s3_irq_control, &ir->ir_set->irq_control);
+ }
}
static void xhci_set_cmd_ring_deq(struct xhci_hcd *xhci)
@@ -1059,7 +1074,7 @@ int xhci_resume(struct xhci_hcd *xhci, pm_message_t msg)
xhci_dbg(xhci, "// Disabling event ring interrupts\n");
temp = readl(&xhci->op_regs->status);
writel((temp & ~0x1fff) | STS_EINT, &xhci->op_regs->status);
- xhci_disable_interrupter(xhci->interrupter);
+ xhci_disable_interrupter(xhci->interrupters[0]);
xhci_dbg(xhci, "cleaning up memory\n");
xhci_mem_cleanup(xhci);
@@ -1772,7 +1772,7 @@ struct xhci_hcd {
struct reset_control *reset;
/* data structures */
struct xhci_device_context_array *dcbaa;
- struct xhci_interrupter *interrupter;
+ struct xhci_interrupter **interrupters;
struct xhci_ring *cmd_ring;
unsigned int cmd_ring_state;
#define CMD_RING_STATE_RUNNING (1 << 0)
@@ -2088,6 +2088,9 @@ struct xhci_container_ctx *xhci_alloc_container_ctx(struct xhci_hcd *xhci,
int type, gfp_t flags);
void xhci_free_container_ctx(struct xhci_hcd *xhci,
struct xhci_container_ctx *ctx);
+struct xhci_interrupter *xhci_create_secondary_interrupter(struct usb_hcd *hcd);
+void xhci_remove_secondary_interrupter(struct usb_hcd
+ *hcd, struct xhci_interrupter *ir);
/* xHCI host controller glue */
typedef void (*xhci_get_quirks_t)(struct device *, struct xhci_hcd *);