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Mass-storage performance enhancements #7578

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Mass-storage performance enhancements #7578

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fa6903d
DT: rp1: remove dwc3 parkmode-disable-hs quirk
P33M Aug 21, 2026
0ef14e2
usb-storage: pick better defaults for max_sectors
P33M Aug 26, 2026
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2 changes: 0 additions & 2 deletions arch/arm64/boot/dts/broadcom/rp1.dtsi
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Original file line number Diff line number Diff line change
Expand Up @@ -1126,7 +1126,6 @@
snps,dis_rxdet_inp3_quirk;
snps,enhanced-nak-fs-quirk;
snps,parkmode-disable-ss-quirk;
snps,parkmode-disable-hs-quirk;
snps,parkmode-disable-fsls-quirk;
snps,tx-max-burst = /bits/ 8 <8>;
snps,tx-thr-num-pkt = /bits/ 8 <2>;
Expand All @@ -1143,7 +1142,6 @@
snps,dis_rxdet_inp3_quirk;
snps,enhanced-nak-fs-quirk;
snps,parkmode-disable-ss-quirk;
snps,parkmode-disable-hs-quirk;
snps,parkmode-disable-fsls-quirk;
snps,tx-max-burst = /bits/ 8 <8>;
snps,tx-thr-num-pkt = /bits/ 8 <2>;
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12 changes: 11 additions & 1 deletion drivers/usb/storage/scsiglue.c
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Original file line number Diff line number Diff line change
Expand Up @@ -111,14 +111,24 @@ static int sdev_configure(struct scsi_device *sdev, struct queue_limits *lim)
* let the queue segment size sort out the real limit.
*/
lim->max_hw_sectors = 0x7FFFFF;
} else if (us->pusb_dev->speed >= USB_SPEED_SUPER) {
} else if (us->pusb_dev->speed >= USB_SPEED_SUPER ||
(us->pusb_dev->bos && us->pusb_dev->bos->ss_cap)) {
/*
* USB3 devices will be limited to 2048 sectors. This gives us
* better throughput on most devices.
*/
lim->max_hw_sectors = 2048;
}

/*
* The default of 240 sectors on 16K page platforms causes decomposition
* of transfers into lengths of 224 sectors aligned to 32 sectors.
* Middle-of-the-range devices show a modest sequential speed increase
* with 192 sectors (64s alignment).
*/
if (lim->max_hw_sectors == 240 && PAGE_SIZE == SZ_16K)
lim->max_hw_sectors = 192;

/*
* The max_hw_sectors should be up to maximum size of a mapping for
* the device. Otherwise, a DMA API might fail on swiotlb environment.
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