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path: root/drivers/usb/host/xhci-dbg.c
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Diffstat (limited to 'drivers/usb/host/xhci-dbg.c')
-rw-r--r--drivers/usb/host/xhci-dbg.c485
1 files changed, 485 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci-dbg.c b/drivers/usb/host/xhci-dbg.c
new file mode 100644
index 0000000..2501c57
--- /dev/null
+++ b/drivers/usb/host/xhci-dbg.c
@@ -0,0 +1,485 @@
+/*
+ * xHCI host controller driver
+ *
+ * Copyright (C) 2008 Intel Corp.
+ *
+ * Author: Sarah Sharp
+ * Some code borrowed from the Linux EHCI driver.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "xhci.h"
+
+#define XHCI_INIT_VALUE 0x0
+
+/* Add verbose debugging later, just print everything for now */
+
+void xhci_dbg_regs(struct xhci_hcd *xhci)
+{
+ u32 temp;
+
+ xhci_dbg(xhci, "// xHCI capability registers at %p:\n",
+ xhci->cap_regs);
+ temp = xhci_readl(xhci, &xhci->cap_regs->hc_capbase);
+ xhci_dbg(xhci, "// @%p = 0x%x (CAPLENGTH AND HCIVERSION)\n",
+ &xhci->cap_regs->hc_capbase, temp);
+ xhci_dbg(xhci, "// CAPLENGTH: 0x%x\n",
+ (unsigned int) HC_LENGTH(temp));
+#if 0
+ xhci_dbg(xhci, "// HCIVERSION: 0x%x\n",
+ (unsigned int) HC_VERSION(temp));
+#endif
+
+ xhci_dbg(xhci, "// xHCI operational registers at %p:\n", xhci->op_regs);
+
+ temp = xhci_readl(xhci, &xhci->cap_regs->run_regs_off);
+ xhci_dbg(xhci, "// @%p = 0x%x RTSOFF\n",
+ &xhci->cap_regs->run_regs_off,
+ (unsigned int) temp & RTSOFF_MASK);
+ xhci_dbg(xhci, "// xHCI runtime registers at %p:\n", xhci->run_regs);
+
+ temp = xhci_readl(xhci, &xhci->cap_regs->db_off);
+ xhci_dbg(xhci, "// @%p = 0x%x DBOFF\n", &xhci->cap_regs->db_off, temp);
+ xhci_dbg(xhci, "// Doorbell array at %p:\n", xhci->dba);
+}
+
+static void xhci_print_cap_regs(struct xhci_hcd *xhci)
+{
+ u32 temp;
+
+ xhci_dbg(xhci, "xHCI capability registers at %p:\n", xhci->cap_regs);
+
+ temp = xhci_readl(xhci, &xhci->cap_regs->hc_capbase);
+ xhci_dbg(xhci, "CAPLENGTH AND HCIVERSION 0x%x:\n",
+ (unsigned int) temp);
+ xhci_dbg(xhci, "CAPLENGTH: 0x%x\n",
+ (unsigned int) HC_LENGTH(temp));
+ xhci_dbg(xhci, "HCIVERSION: 0x%x\n",
+ (unsigned int) HC_VERSION(temp));
+
+ temp = xhci_readl(xhci, &xhci->cap_regs->hcs_params1);
+ xhci_dbg(xhci, "HCSPARAMS 1: 0x%x\n",
+ (unsigned int) temp);
+ xhci_dbg(xhci, " Max device slots: %u\n",
+ (unsigned int) HCS_MAX_SLOTS(temp));
+ xhci_dbg(xhci, " Max interrupters: %u\n",
+ (unsigned int) HCS_MAX_INTRS(temp));
+ xhci_dbg(xhci, " Max ports: %u\n",
+ (unsigned int) HCS_MAX_PORTS(temp));
+
+ temp = xhci_readl(xhci, &xhci->cap_regs->hcs_params2);
+ xhci_dbg(xhci, "HCSPARAMS 2: 0x%x\n",
+ (unsigned int) temp);
+ xhci_dbg(xhci, " Isoc scheduling threshold: %u\n",
+ (unsigned int) HCS_IST(temp));
+ xhci_dbg(xhci, " Maximum allowed segments in event ring: %u\n",
+ (unsigned int) HCS_ERST_MAX(temp));
+
+ temp = xhci_readl(xhci, &xhci->cap_regs->hcs_params3);
+ xhci_dbg(xhci, "HCSPARAMS 3 0x%x:\n",
+ (unsigned int) temp);
+ xhci_dbg(xhci, " Worst case U1 device exit latency: %u\n",
+ (unsigned int) HCS_U1_LATENCY(temp));
+ xhci_dbg(xhci, " Worst case U2 device exit latency: %u\n",
+ (unsigned int) HCS_U2_LATENCY(temp));
+
+ temp = xhci_readl(xhci, &xhci->cap_regs->hcc_params);
+ xhci_dbg(xhci, "HCC PARAMS 0x%x:\n", (unsigned int) temp);
+ xhci_dbg(xhci, " HC generates %s bit addresses\n",
+ HCC_64BIT_ADDR(temp) ? "64" : "32");
+ /* FIXME */
+ xhci_dbg(xhci, " FIXME: more HCCPARAMS debugging\n");
+
+ temp = xhci_readl(xhci, &xhci->cap_regs->run_regs_off);
+ xhci_dbg(xhci, "RTSOFF 0x%x:\n", temp & RTSOFF_MASK);
+}
+
+static void xhci_print_command_reg(struct xhci_hcd *xhci)
+{
+ u32 temp;
+
+ temp = xhci_readl(xhci, &xhci->op_regs->command);
+ xhci_dbg(xhci, "USBCMD 0x%x:\n", temp);
+ xhci_dbg(xhci, " HC is %s\n",
+ (temp & CMD_RUN) ? "running" : "being stopped");
+ xhci_dbg(xhci, " HC has %sfinished hard reset\n",
+ (temp & CMD_RESET) ? "not " : "");
+ xhci_dbg(xhci, " Event Interrupts %s\n",
+ (temp & CMD_EIE) ? "enabled " : "disabled");
+ xhci_dbg(xhci, " Host System Error Interrupts %s\n",
+ (temp & CMD_EIE) ? "enabled " : "disabled");
+ xhci_dbg(xhci, " HC has %sfinished light reset\n",
+ (temp & CMD_LRESET) ? "not " : "");
+}
+
+static void xhci_print_status(struct xhci_hcd *xhci)
+{
+ u32 temp;
+
+ temp = xhci_readl(xhci, &xhci->op_regs->status);
+ xhci_dbg(xhci, "USBSTS 0x%x:\n", temp);
+ xhci_dbg(xhci, " Event ring is %sempty\n",
+ (temp & STS_EINT) ? "not " : "");
+ xhci_dbg(xhci, " %sHost System Error\n",
+ (temp & STS_FATAL) ? "WARNING: " : "No ");
+ xhci_dbg(xhci, " HC is %s\n",
+ (temp & STS_HALT) ? "halted" : "running");
+}
+
+static void xhci_print_op_regs(struct xhci_hcd *xhci)
+{
+ xhci_dbg(xhci, "xHCI operational registers at %p:\n", xhci->op_regs);
+ xhci_print_command_reg(xhci);
+ xhci_print_status(xhci);
+}
+
+static void xhci_print_ports(struct xhci_hcd *xhci)
+{
+ u32 __iomem *addr;
+ int i, j;
+ int ports;
+ char *names[NUM_PORT_REGS] = {
+ "status",
+ "power",
+ "link",
+ "reserved",
+ };
+
+ ports = HCS_MAX_PORTS(xhci->hcs_params1);
+ addr = &xhci->op_regs->port_status_base;
+ for (i = 0; i < ports; i++) {
+ for (j = 0; j < NUM_PORT_REGS; ++j) {
+ xhci_dbg(xhci, "%p port %s reg = 0x%x\n",
+ addr, names[j],
+ (unsigned int) xhci_readl(xhci, addr));
+ addr++;
+ }
+ }
+}
+
+void xhci_print_ir_set(struct xhci_hcd *xhci, struct xhci_intr_reg *ir_set, int set_num)
+{
+ void *addr;
+ u32 temp;
+
+ addr = &ir_set->irq_pending;
+ temp = xhci_readl(xhci, addr);
+ if (temp == XHCI_INIT_VALUE)
+ return;
+
+ xhci_dbg(xhci, " %p: ir_set[%i]\n", ir_set, set_num);
+
+ xhci_dbg(xhci, " %p: ir_set.pending = 0x%x\n", addr,
+ (unsigned int)temp);
+
+ addr = &ir_set->irq_control;
+ temp = xhci_readl(xhci, addr);
+ xhci_dbg(xhci, " %p: ir_set.control = 0x%x\n", addr,
+ (unsigned int)temp);
+
+ addr = &ir_set->erst_size;
+ temp = xhci_readl(xhci, addr);
+ xhci_dbg(xhci, " %p: ir_set.erst_size = 0x%x\n", addr,
+ (unsigned int)temp);
+
+ addr = &ir_set->rsvd;
+ temp = xhci_readl(xhci, addr);
+ if (temp != XHCI_INIT_VALUE)
+ xhci_dbg(xhci, " WARN: %p: ir_set.rsvd = 0x%x\n",
+ addr, (unsigned int)temp);
+
+ addr = &ir_set->erst_base[0];
+ temp = xhci_readl(xhci, addr);
+ xhci_dbg(xhci, " %p: ir_set.erst_base[0] = 0x%x\n",
+ addr, (unsigned int) temp);
+
+ addr = &ir_set->erst_base[1];
+ temp = xhci_readl(xhci, addr);
+ xhci_dbg(xhci, " %p: ir_set.erst_base[1] = 0x%x\n",
+ addr, (unsigned int) temp);
+
+ addr = &ir_set->erst_dequeue[0];
+ temp = xhci_readl(xhci, addr);
+ xhci_dbg(xhci, " %p: ir_set.erst_dequeue[0] = 0x%x\n",
+ addr, (unsigned int) temp);
+
+ addr = &ir_set->erst_dequeue[1];
+ temp = xhci_readl(xhci, addr);
+ xhci_dbg(xhci, " %p: ir_set.erst_dequeue[1] = 0x%x\n",
+ addr, (unsigned int) temp);
+}
+
+void xhci_print_run_regs(struct xhci_hcd *xhci)
+{
+ u32 temp;
+ int i;
+
+ xhci_dbg(xhci, "xHCI runtime registers at %p:\n", xhci->run_regs);
+ temp = xhci_readl(xhci, &xhci->run_regs->microframe_index);
+ xhci_dbg(xhci, " %p: Microframe index = 0x%x\n",
+ &xhci->run_regs->microframe_index,
+ (unsigned int) temp);
+ for (i = 0; i < 7; ++i) {
+ temp = xhci_readl(xhci, &xhci->run_regs->rsvd[i]);
+ if (temp != XHCI_INIT_VALUE)
+ xhci_dbg(xhci, " WARN: %p: Rsvd[%i] = 0x%x\n",
+ &xhci->run_regs->rsvd[i],
+ i, (unsigned int) temp);
+ }
+}
+
+void xhci_print_registers(struct xhci_hcd *xhci)
+{
+ xhci_print_cap_regs(xhci);
+ xhci_print_op_regs(xhci);
+ xhci_print_ports(xhci);
+}
+
+void xhci_print_trb_offsets(struct xhci_hcd *xhci, union xhci_trb *trb)
+{
+ int i;
+ for (i = 0; i < 4; ++i)
+ xhci_dbg(xhci, "Offset 0x%x = 0x%x\n",
+ i*4, trb->generic.field[i]);
+}
+
+/**
+ * Debug a transfer request block (TRB).
+ */
+void xhci_debug_trb(struct xhci_hcd *xhci, union xhci_trb *trb)
+{
+ u64 address;
+ u32 type = xhci_readl(xhci, &trb->link.control) & TRB_TYPE_BITMASK;
+
+ switch (type) {
+ case TRB_TYPE(TRB_LINK):
+ xhci_dbg(xhci, "Link TRB:\n");
+ xhci_print_trb_offsets(xhci, trb);
+
+ address = trb->link.segment_ptr[0] +
+ (((u64) trb->link.segment_ptr[1]) << 32);
+ xhci_dbg(xhci, "Next ring segment DMA address = 0x%llx\n", address);
+
+ xhci_dbg(xhci, "Interrupter target = 0x%x\n",
+ GET_INTR_TARGET(trb->link.intr_target));
+ xhci_dbg(xhci, "Cycle bit = %u\n",
+ (unsigned int) (trb->link.control & TRB_CYCLE));
+ xhci_dbg(xhci, "Toggle cycle bit = %u\n",
+ (unsigned int) (trb->link.control & LINK_TOGGLE));
+ xhci_dbg(xhci, "No Snoop bit = %u\n",
+ (unsigned int) (trb->link.control & TRB_NO_SNOOP));
+ break;
+ case TRB_TYPE(TRB_TRANSFER):
+ address = trb->trans_event.buffer[0] +
+ (((u64) trb->trans_event.buffer[1]) << 32);
+ /*
+ * FIXME: look at flags to figure out if it's an address or if
+ * the data is directly in the buffer field.
+ */
+ xhci_dbg(xhci, "DMA address or buffer contents= %llu\n", address);
+ break;
+ case TRB_TYPE(TRB_COMPLETION):
+ address = trb->event_cmd.cmd_trb[0] +
+ (((u64) trb->event_cmd.cmd_trb[1]) << 32);
+ xhci_dbg(xhci, "Command TRB pointer = %llu\n", address);
+ xhci_dbg(xhci, "Completion status = %u\n",
+ (unsigned int) GET_COMP_CODE(trb->event_cmd.status));
+ xhci_dbg(xhci, "Flags = 0x%x\n", (unsigned int) trb->event_cmd.flags);
+ break;
+ default:
+ xhci_dbg(xhci, "Unknown TRB with TRB type ID %u\n",
+ (unsigned int) type>>10);
+ xhci_print_trb_offsets(xhci, trb);
+ break;
+ }
+}
+
+/**
+ * Debug a segment with an xHCI ring.
+ *
+ * @return The Link TRB of the segment, or NULL if there is no Link TRB
+ * (which is a bug, since all segments must have a Link TRB).
+ *
+ * Prints out all TRBs in the segment, even those after the Link TRB.
+ *
+ * XXX: should we print out TRBs that the HC owns? As long as we don't
+ * write, that should be fine... We shouldn't expect that the memory pointed to
+ * by the TRB is valid at all. Do we care about ones the HC owns? Probably,
+ * for HC debugging.
+ */
+void xhci_debug_segment(struct xhci_hcd *xhci, struct xhci_segment *seg)
+{
+ int i;
+ u32 addr = (u32) seg->dma;
+ union xhci_trb *trb = seg->trbs;
+
+ for (i = 0; i < TRBS_PER_SEGMENT; ++i) {
+ trb = &seg->trbs[i];
+ xhci_dbg(xhci, "@%08x %08x %08x %08x %08x\n", addr,
+ (unsigned int) trb->link.segment_ptr[0],
+ (unsigned int) trb->link.segment_ptr[1],
+ (unsigned int) trb->link.intr_target,
+ (unsigned int) trb->link.control);
+ addr += sizeof(*trb);
+ }
+}
+
+void xhci_dbg_ring_ptrs(struct xhci_hcd *xhci, struct xhci_ring *ring)
+{
+ xhci_dbg(xhci, "Ring deq = %p (virt), 0x%llx (dma)\n",
+ ring->dequeue,
+ (unsigned long long)xhci_trb_virt_to_dma(ring->deq_seg,
+ ring->dequeue));
+ xhci_dbg(xhci, "Ring deq updated %u times\n",
+ ring->deq_updates);
+ xhci_dbg(xhci, "Ring enq = %p (virt), 0x%llx (dma)\n",
+ ring->enqueue,
+ (unsigned long long)xhci_trb_virt_to_dma(ring->enq_seg,
+ ring->enqueue));
+ xhci_dbg(xhci, "Ring enq updated %u times\n",
+ ring->enq_updates);
+}
+
+/**
+ * Debugging for an xHCI ring, which is a queue broken into multiple segments.
+ *
+ * Print out each segment in the ring. Check that the DMA address in
+ * each link segment actually matches the segment's stored DMA address.
+ * Check that the link end bit is only set at the end of the ring.
+ * Check that the dequeue and enqueue pointers point to real data in this ring
+ * (not some other ring).
+ */
+void xhci_debug_ring(struct xhci_hcd *xhci, struct xhci_ring *ring)
+{
+ /* FIXME: Throw an error if any segment doesn't have a Link TRB */
+ struct xhci_segment *seg;
+ struct xhci_segment *first_seg = ring->first_seg;
+ xhci_debug_segment(xhci, first_seg);
+
+ if (!ring->enq_updates && !ring->deq_updates) {
+ xhci_dbg(xhci, " Ring has not been updated\n");
+ return;
+ }
+ for (seg = first_seg->next; seg != first_seg; seg = seg->next)
+ xhci_debug_segment(xhci, seg);
+}
+
+void xhci_dbg_erst(struct xhci_hcd *xhci, struct xhci_erst *erst)
+{
+ u32 addr = (u32) erst->erst_dma_addr;
+ int i;
+ struct xhci_erst_entry *entry;
+
+ for (i = 0; i < erst->num_entries; ++i) {
+ entry = &erst->entries[i];
+ xhci_dbg(xhci, "@%08x %08x %08x %08x %08x\n",
+ (unsigned int) addr,
+ (unsigned int) entry->seg_addr[0],
+ (unsigned int) entry->seg_addr[1],
+ (unsigned int) entry->seg_size,
+ (unsigned int) entry->rsvd);
+ addr += sizeof(*entry);
+ }
+}
+
+void xhci_dbg_cmd_ptrs(struct xhci_hcd *xhci)
+{
+ u32 val;
+
+ val = xhci_readl(xhci, &xhci->op_regs->cmd_ring[0]);
+ xhci_dbg(xhci, "// xHC command ring deq ptr low bits + flags = 0x%x\n", val);
+ val = xhci_readl(xhci, &xhci->op_regs->cmd_ring[1]);
+ xhci_dbg(xhci, "// xHC command ring deq ptr high bits = 0x%x\n", val);
+}
+
+void xhci_dbg_ctx(struct xhci_hcd *xhci, struct xhci_device_control *ctx, dma_addr_t dma, unsigned int last_ep)
+{
+ int i, j;
+ int last_ep_ctx = 31;
+ /* Fields are 32 bits wide, DMA addresses are in bytes */
+ int field_size = 32 / 8;
+
+ xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - drop flags\n",
+ &ctx->drop_flags, (unsigned long long)dma,
+ ctx->drop_flags);
+ dma += field_size;
+ xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - add flags\n",
+ &ctx->add_flags, (unsigned long long)dma,
+ ctx->add_flags);
+ dma += field_size;
+ for (i = 0; i > 6; ++i) {
+ xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - rsvd[%d]\n",
+ &ctx->rsvd[i], (unsigned long long)dma,
+ ctx->rsvd[i], i);
+ dma += field_size;
+ }
+
+ xhci_dbg(xhci, "Slot Context:\n");
+ xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - dev_info\n",
+ &ctx->slot.dev_info,
+ (unsigned long long)dma, ctx->slot.dev_info);
+ dma += field_size;
+ xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - dev_info2\n",
+ &ctx->slot.dev_info2,
+ (unsigned long long)dma, ctx->slot.dev_info2);
+ dma += field_size;
+ xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - tt_info\n",
+ &ctx->slot.tt_info,
+ (unsigned long long)dma, ctx->slot.tt_info);
+ dma += field_size;
+ xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - dev_state\n",
+ &ctx->slot.dev_state,
+ (unsigned long long)dma, ctx->slot.dev_state);
+ dma += field_size;
+ for (i = 0; i > 4; ++i) {
+ xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - rsvd[%d]\n",
+ &ctx->slot.reserved[i], (unsigned long long)dma,
+ ctx->slot.reserved[i], i);
+ dma += field_size;
+ }
+
+ if (last_ep < 31)
+ last_ep_ctx = last_ep + 1;
+ for (i = 0; i < last_ep_ctx; ++i) {
+ xhci_dbg(xhci, "Endpoint %02d Context:\n", i);
+ xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - ep_info\n",
+ &ctx->ep[i].ep_info,
+ (unsigned long long)dma, ctx->ep[i].ep_info);
+ dma += field_size;
+ xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - ep_info2\n",
+ &ctx->ep[i].ep_info2,
+ (unsigned long long)dma, ctx->ep[i].ep_info2);
+ dma += field_size;
+ xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - deq[0]\n",
+ &ctx->ep[i].deq[0],
+ (unsigned long long)dma, ctx->ep[i].deq[0]);
+ dma += field_size;
+ xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - deq[1]\n",
+ &ctx->ep[i].deq[1],
+ (unsigned long long)dma, ctx->ep[i].deq[1]);
+ dma += field_size;
+ xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - tx_info\n",
+ &ctx->ep[i].tx_info,
+ (unsigned long long)dma, ctx->ep[i].tx_info);
+ dma += field_size;
+ for (j = 0; j < 3; ++j) {
+ xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - rsvd[%d]\n",
+ &ctx->ep[i].reserved[j],
+ (unsigned long long)dma,
+ ctx->ep[i].reserved[j], j);
+ dma += field_size;
+ }
+ }
+}
generated by cgit v0.10.2 at 2024-11-10 23:30:55 (GMT)