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xhci: fix event ring segment table related masks and variables in header 

xHC controller can supports up to 1024 interrupters.
To fit these change the max_interrupters varable from u8 to u16.

Add a separate mask for the reserve and preserve bits [5:0] in the erst
base register and use it instead of the ERST_PRT_MASK.
ERSR_PTR_MASK [3:0] is intended for masking bits in the
event ring dequeue pointer register.

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20230202150505.618915-2-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mathias Nyman 2023-02-02 17:04:55 +02:00 committed by Greg Kroah-Hartman
parent 130c4dcbe8
commit 8c1cbec9db
2 changed files with 6 additions and 3 deletions
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4
drivers/usb/host/xhci-mem.c
View File

@ -2529,8 +2529,8 @@ int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags)
"// Set ERST base address for ir_set 0 = 0x%llx",
(unsigned long long)xhci->erst.erst_dma_addr);
val_64 = xhci_read_64(xhci, &xhci->ir_set->erst_base);
val_64 &= ERST_PTR_MASK;
val_64 |= (xhci->erst.erst_dma_addr & (u64) ~ERST_PTR_MASK);
val_64 &= ERST_BASE_RSVDP;
val_64 |= (xhci->erst.erst_dma_addr & (u64) ~ERST_BASE_RSVDP);
xhci_write_64(xhci, val_64, &xhci->ir_set->erst_base);
/* Set the event ring dequeue address */

5
drivers/usb/host/xhci.h
View File

@ -513,6 +513,9 @@ struct xhci_intr_reg {
/* Preserve bits 16:31 of erst_size */
#define ERST_SIZE_MASK (0xffff << 16)
/* erst_base bitmasks */
#define ERST_BASE_RSVDP (0x3f)
/* erst_dequeue bitmasks */
/* Dequeue ERST Segment Index (DESI) - Segment number (or alias)
* where the current dequeue pointer lies. This is an optional HW hint.
@ -1774,7 +1777,7 @@ struct xhci_hcd {
u8 sbrn;
u16 hci_version;
u8 max_slots;
u8 max_interrupters;
u16 max_interrupters;
u8 max_ports;
u8 isoc_threshold;
/* imod_interval in ns (I * 250ns) */