From: Mathias Nyman <mathias.nyman@linux.intel.com>
To: <gregkh@linuxfoundation.org>
Cc: <linux-usb@vger.kernel.org>,
Mathias Nyman <mathias.nyman@linux.intel.com>
Subject: [PATCH 03/27] xhci: Don't pass struct xhci_hcd pointer to xhci_link_seg()
Date: Thu, 23 Jul 2020 17:45:06 +0300 [thread overview]
Message-ID: <20200723144530.9992-4-mathias.nyman@linux.intel.com> (raw)
In-Reply-To: <20200723144530.9992-1-mathias.nyman@linux.intel.com>
It's only used to dig out if we need to set a chain flag for specific
hosts. Pass the flag directly as a parameter instead.
No functional changes.
xhci_link_seg() is also used by DbC code, this change helps decoupling
xhci and DbC.
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
---
drivers/usb/host/xhci-mem.c | 31 ++++++++++++++++++++-----------
1 file changed, 20 insertions(+), 11 deletions(-)
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index fb221c091478..d38779e2fc84 100644
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -96,8 +96,9 @@ static void xhci_free_segments_for_ring(struct xhci_hcd *xhci,
* DMA address of the next segment. The caller needs to set any Link TRB
* related flags, such as End TRB, Toggle Cycle, and no snoop.
*/
-static void xhci_link_segments(struct xhci_hcd *xhci, struct xhci_segment *prev,
- struct xhci_segment *next, enum xhci_ring_type type)
+static void xhci_link_segments(struct xhci_segment *prev,
+ struct xhci_segment *next,
+ enum xhci_ring_type type, bool chain_links)
{
u32 val;
@@ -112,11 +113,7 @@ static void xhci_link_segments(struct xhci_hcd *xhci, struct xhci_segment *prev,
val = le32_to_cpu(prev->trbs[TRBS_PER_SEGMENT-1].link.control);
val &= ~TRB_TYPE_BITMASK;
val |= TRB_TYPE(TRB_LINK);
- /* Always set the chain bit with 0.95 hardware */
- /* Set chain bit for isoc rings on AMD 0.96 host */
- if (xhci_link_trb_quirk(xhci) ||
- (type == TYPE_ISOC &&
- (xhci->quirks & XHCI_AMD_0x96_HOST)))
+ if (chain_links)
val |= TRB_CHAIN;
prev->trbs[TRBS_PER_SEGMENT-1].link.control = cpu_to_le32(val);
}
@@ -131,13 +128,19 @@ static void xhci_link_rings(struct xhci_hcd *xhci, struct xhci_ring *ring,
unsigned int num_segs)
{
struct xhci_segment *next;
+ bool chain_links;
if (!ring || !first || !last)
return;
+ /* Set chain bit for 0.95 hosts, and for isoc rings on AMD 0.96 host */
+ chain_links = !!(xhci_link_trb_quirk(xhci) ||
+ (ring->type == TYPE_ISOC &&
+ (xhci->quirks & XHCI_AMD_0x96_HOST)));
+
next = ring->enq_seg->next;
- xhci_link_segments(xhci, ring->enq_seg, first, ring->type);
- xhci_link_segments(xhci, last, next, ring->type);
+ xhci_link_segments(ring->enq_seg, first, ring->type, chain_links);
+ xhci_link_segments(last, next, ring->type, chain_links);
ring->num_segs += num_segs;
ring->num_trbs_free += (TRBS_PER_SEGMENT - 1) * num_segs;
@@ -321,6 +324,12 @@ static int xhci_alloc_segments_for_ring(struct xhci_hcd *xhci,
enum xhci_ring_type type, unsigned int max_packet, gfp_t flags)
{
struct xhci_segment *prev;
+ bool chain_links;
+
+ /* Set chain bit for 0.95 hosts, and for isoc rings on AMD 0.96 host */
+ chain_links = !!(xhci_link_trb_quirk(xhci) ||
+ (type == TYPE_ISOC &&
+ (xhci->quirks & XHCI_AMD_0x96_HOST)));
prev = xhci_segment_alloc(xhci, cycle_state, max_packet, flags);
if (!prev)
@@ -341,12 +350,12 @@ static int xhci_alloc_segments_for_ring(struct xhci_hcd *xhci,
}
return -ENOMEM;
}
- xhci_link_segments(xhci, prev, next, type);
+ xhci_link_segments(prev, next, type, chain_links);
prev = next;
num_segs--;
}
- xhci_link_segments(xhci, prev, *first, type);
+ xhci_link_segments(prev, *first, type, chain_links);
*last = prev;
return 0;
--
2.17.1
next prev parent reply other threads:[~2020-07-23 14:42 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-23 14:45 [PATCH 00/27] xhci features for usb-next Mathias Nyman
2020-07-23 14:45 ` [PATCH 01/27] xhci: Make debug message consistent with bus and port number Mathias Nyman
2020-07-23 14:45 ` [PATCH 02/27] xhci: dbc: Don't use generic xhci inc_deq() function for dbc Mathias Nyman
2020-07-23 14:45 ` Mathias Nyman [this message]
2020-07-23 14:45 ` [PATCH 04/27] xhci: dbc: Don't use generic xhci erst allocation and free functions Mathias Nyman
2020-07-23 14:45 ` [PATCH 05/27] xhci: dbc: Remove dbc_dma_alloc_coherent() wrapper Mathias Nyman
2020-07-23 14:45 ` [PATCH 06/27] xhci: dbc: Remove dbc_dma_free_coherent() wrapper Mathias Nyman
2020-07-23 14:45 ` [PATCH 07/27] xhci: dbc: Add device pointer to dbc structure Mathias Nyman
2020-07-23 14:45 ` [PATCH 08/27] xhci: dbc: Use dev_info() and similar instead of xhci_info() Mathias Nyman
2020-07-23 14:45 ` [PATCH 09/27] xhci: dbc: Don't use xhci_write_64() as it takes xhci as a parameter Mathias Nyman
2020-07-23 14:45 ` [PATCH 10/27] xhci: dbc: Don't pass the xhci pointer as a parameter to xhci_dbc_init_context() Mathias Nyman
2020-07-23 14:45 ` [PATCH 11/27] xhci: dbc: Get the device pointer from dbc structure in dbc_ep_do_queue() Mathias Nyman
2020-07-23 14:45 ` [PATCH 12/27] xhci: dbc: Pass dbc pointer to endpoint init and exit functions Mathias Nyman
2020-07-23 14:45 ` [PATCH 13/27] xhci: dbc: Change to pass dbc pointer to xhci_do_dbc_stop() Mathias Nyman
2020-07-23 14:45 ` [PATCH 14/27] xhci: dbc: Pass dbc pointer to dbc_handle_xfer_event() instead of xhci_hcd pointer Mathias Nyman
2020-07-23 14:45 ` [PATCH 15/27] xhci: dbgtty: Pass dbc pointer when registering a dbctty device Mathias Nyman
2020-07-23 14:45 ` [PATCH 16/27] xhci: dbc: Pass dbc pointer to get_in/out_ep() helper functions to get endpoints Mathias Nyman
2020-07-23 14:45 ` [PATCH 17/27] xhci: dbc: Use dbc structure in the request completion instead of xhci_hcd Mathias Nyman
2020-07-23 14:45 ` [PATCH 18/27] xhci: dbc: Don't use generic xhci context allocation for dbc Mathias Nyman
2020-07-23 14:45 ` [PATCH 19/27] xhci: dbc: don't use generic xhci ring allocation functions " Mathias Nyman
2020-07-23 14:45 ` [PATCH 20/27] xhci: dbc: Pass dbc pointer to dbc memory init and cleanup functions Mathias Nyman
2020-07-23 14:45 ` [PATCH 21/27] xhci: dbc: Pass dbc pointer to dbc start and stop functions Mathias Nyman
2020-07-23 14:45 ` [PATCH 22/27] xhci: dbc: simplify dbc requests allocation and queueing Mathias Nyman
2020-07-23 14:45 ` [PATCH 23/27] xhci: dbc: remove endpoint pointers from dbc_port structure Mathias Nyman
2020-07-23 14:45 ` [PATCH 24/27] xhci: dbctty: split dbc tty driver registration and unregistration functions Mathias Nyman
2020-07-23 14:45 ` [PATCH 25/27] xhci: dbc: Add a operations structure to access driver functions Mathias Nyman
2020-07-23 14:45 ` [PATCH 26/27] xhci: dbgcap: remove dbc dependency on dbctty specific flag Mathias Nyman
2020-07-23 14:45 ` [PATCH 27/27] xhci: dbc: remove tty specific port structure from struct xhci_dbc Mathias Nyman
2020-07-23 15:04 ` [PATCH 00/27] xhci features for usb-next Greg KH
2020-07-23 18:47 ` Mathias Nyman
2020-07-24 7:06 ` Greg KH
2020-07-24 11:11 ` Mathias Nyman
2020-07-24 16:32 ` Greg KH
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