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d91f38a99e
Removed upstreamed: generic/backport-6.1/701-v6.5-net-bgmac-postpone-turning-IRQs-off-to-avoid-SoC-han.patch[1] generic/pending-6.1/160-workqueue-fix-enum-type-for-gcc-13.patch[2] qualcommax/patches-6.1/0022-v6.5-soc-qcom-mdt_loader-Fix-unconditional-call-to-scm_pa.patch[3] Manually rebased: bcm27xx/patches-6.1/950-0359-xhci-quirks-add-link-TRB-quirk-for-VL805.patch bcm27xx/patches-6.1/950-0362-usb-xhci-add-VLI_TRB_CACHE_BUG-quirk.patch bcm27xx/patches-6.1/950-0390-usb-xhci-add-a-quirk-for-Superspeed-bulk-OUT-transfe.patch bcm27xx/patches-6.1/950-0469-usb-xhci-add-XHCI_VLI_HUB_TT_QUIRK.patch bcm53xx/patches-6.1/180-usb-xhci-add-support-for-performing-fake-doorbell.patch All other patches automatically rebased. 1. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.1.40&id=685b57a1221c38ec8b456f968264d2496715820c 2. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.1.40&id=2d57a1590f4d8c516f5aaf8fd5bb4f52d67275d8 3. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.1.40&id=33f8dff6e1cbba5c2ec85fa5649c0a759a7e685c Build system: x86/64, filogic/xiaomi_redmi-router-ax6000-ubootmod Build-tested: x86/64, filogic/xiaomi_redmi-router-ax6000-ubootmod Run-tested: x86/64 Signed-off-by: John Audia <therealgraysky@proton.me>
61 lines
2.5 KiB
Diff
61 lines
2.5 KiB
Diff
From 44bfc1e281e081d9ddd0e633ed2dd73c969333f4 Mon Sep 17 00:00:00 2001
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From: Jonathan Bell <jonathan@raspberrypi.org>
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Date: Tue, 13 Aug 2019 15:53:29 +0100
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Subject: [PATCH] xhci: Use more event ring segment table entries
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Users have reported log spam created by "Event Ring Full" xHC event
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TRBs. These are caused by interrupt latency in conjunction with a very
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busy set of devices on the bus. The errors are benign, but throughput
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will suffer as the xHC will pause processing of transfers until the
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event ring is drained by the kernel. Expand the number of event TRB slots
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available by increasing the number of event ring segments in the ERST.
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Controllers have a hardware-defined limit as to the number of ERST
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entries they can process, so make the actual number in use
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min(ERST_MAX_SEGS, hw_max).
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Signed-off-by: Jonathan Bell <jonathan@raspberrypi.org>
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---
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drivers/usb/host/xhci-mem.c | 8 +++++---
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drivers/usb/host/xhci.h | 4 ++--
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2 files changed, 7 insertions(+), 5 deletions(-)
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--- a/drivers/usb/host/xhci-mem.c
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+++ b/drivers/usb/host/xhci-mem.c
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@@ -2522,9 +2522,11 @@ int xhci_mem_init(struct xhci_hcd *xhci,
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* Event ring setup: Allocate a normal ring, but also setup
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* the event ring segment table (ERST). Section 4.9.3.
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*/
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+ val2 = 1 << HCS_ERST_MAX(xhci->hcs_params2);
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+ val2 = min_t(unsigned int, ERST_MAX_SEGS, val2);
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xhci_dbg_trace(xhci, trace_xhci_dbg_init, "// Allocating event ring");
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- xhci->event_ring = xhci_ring_alloc(xhci, ERST_NUM_SEGS, 1, TYPE_EVENT,
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- 0, flags);
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+ xhci->event_ring = xhci_ring_alloc(xhci, val2, 1, TYPE_EVENT,
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+ 0, flags);
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if (!xhci->event_ring)
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goto fail;
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if (xhci_check_trb_in_td_math(xhci) < 0)
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@@ -2537,7 +2539,7 @@ int xhci_mem_init(struct xhci_hcd *xhci,
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/* set ERST count with the number of entries in the segment table */
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val = readl(&xhci->ir_set->erst_size);
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val &= ERST_SIZE_MASK;
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- val |= ERST_NUM_SEGS;
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+ val |= val2;
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xhci_dbg_trace(xhci, trace_xhci_dbg_init,
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"// Write ERST size = %i to ir_set 0 (some bits preserved)",
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val);
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--- a/drivers/usb/host/xhci.h
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+++ b/drivers/usb/host/xhci.h
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@@ -1671,8 +1671,8 @@ struct urb_priv {
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* Each segment table entry is 4*32bits long. 1K seems like an ok size:
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* (1K bytes * 8bytes/bit) / (4*32 bits) = 64 segment entries in the table,
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* meaning 64 ring segments.
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- * Initial allocated size of the ERST, in number of entries */
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-#define ERST_NUM_SEGS 1
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+ * Maximum number of segments in the ERST */
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+#define ERST_MAX_SEGS 8
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/* Poll every 60 seconds */
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#define POLL_TIMEOUT 60
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/* Stop endpoint command timeout (secs) for URB cancellation watchdog timer */
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