linux/drivers/net/wireless/broadcom/brcm80211/brcmfmac/flowring.h

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// SPDX-License-Identifier: ISC
/*
* Copyright (c) 2014 Broadcom Corporation
*/
#ifndef BRCMFMAC_FLOWRING_H
#define BRCMFMAC_FLOWRING_H
brcmfmac: Increase nr of supported flowrings. New generation devices have firmware which has more than 256 flowrings. E.g. following debugging message comes from 14e4:4365 BCM4366: [ 194.606245] brcmfmac: brcmf_pcie_init_ringbuffers Nr of flowrings is 264 At various code places (related to flowrings) we were using u8 which could lead to storing wrong number or infinite loops when indexing with this type. This issue was quite easy to spot in brcmf_flowring_detach where it led to infinite loop e.g. on failed initialization. This patch switches code to proper types and increases the maximum number of supported flowrings to 512. Originally this change was sent in September 2015, but back it was causing a regression on BCM43602 resulting in: Unable to handle kernel NULL pointer dereference at virtual address ... The reason for this regression was missing update (s/u8/u16) of struct brcmf_flowring_ring. This problem was handled in 9f64df9 ("brcmfmac: Fix bug in flowring management."). Starting with that it's safe to apply this original patch as it doesn't cause a regression anymore. This patch fixes an infinite loop on BCM4366 which is supported since 4.4 so it makes sense to apply it to stable 4.4+. Cc: <stable@vger.kernel.org> # 4.4+ Reviewed-by: Arend Van Spriel <arend@broadcom.com> Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com> Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com> Signed-off-by: Hante Meuleman <meuleman@broadcom.com> Signed-off-by: Arend van Spriel <arend@broadcom.com> Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
2016-02-08 00:00:30 +01:00
#define BRCMF_FLOWRING_HASHSIZE 512 /* has to be 2^x */
#define BRCMF_FLOWRING_INVALID_ID 0xFFFFFFFF
struct brcmf_flowring_hash {
u8 mac[ETH_ALEN];
u8 fifo;
u8 ifidx;
brcmfmac: Increase nr of supported flowrings. New generation devices have firmware which has more than 256 flowrings. E.g. following debugging message comes from 14e4:4365 BCM4366: [ 194.606245] brcmfmac: brcmf_pcie_init_ringbuffers Nr of flowrings is 264 At various code places (related to flowrings) we were using u8 which could lead to storing wrong number or infinite loops when indexing with this type. This issue was quite easy to spot in brcmf_flowring_detach where it led to infinite loop e.g. on failed initialization. This patch switches code to proper types and increases the maximum number of supported flowrings to 512. Originally this change was sent in September 2015, but back it was causing a regression on BCM43602 resulting in: Unable to handle kernel NULL pointer dereference at virtual address ... The reason for this regression was missing update (s/u8/u16) of struct brcmf_flowring_ring. This problem was handled in 9f64df9 ("brcmfmac: Fix bug in flowring management."). Starting with that it's safe to apply this original patch as it doesn't cause a regression anymore. This patch fixes an infinite loop on BCM4366 which is supported since 4.4 so it makes sense to apply it to stable 4.4+. Cc: <stable@vger.kernel.org> # 4.4+ Reviewed-by: Arend Van Spriel <arend@broadcom.com> Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com> Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com> Signed-off-by: Hante Meuleman <meuleman@broadcom.com> Signed-off-by: Arend van Spriel <arend@broadcom.com> Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
2016-02-08 00:00:30 +01:00
u16 flowid;
};
enum ring_status {
RING_CLOSED,
RING_CLOSING,
RING_OPEN
};
struct brcmf_flowring_ring {
u16 hash_id;
bool blocked;
enum ring_status status;
struct sk_buff_head skblist;
};
struct brcmf_flowring_tdls_entry {
u8 mac[ETH_ALEN];
struct brcmf_flowring_tdls_entry *next;
};
struct brcmf_flowring {
struct device *dev;
struct brcmf_flowring_hash hash[BRCMF_FLOWRING_HASHSIZE];
struct brcmf_flowring_ring **rings;
spinlock_t block_lock;
enum proto_addr_mode addr_mode[BRCMF_MAX_IFS];
u16 nrofrings;
bool tdls_active;
struct brcmf_flowring_tdls_entry *tdls_entry;
};
u32 brcmf_flowring_lookup(struct brcmf_flowring *flow, u8 da[ETH_ALEN],
u8 prio, u8 ifidx);
u32 brcmf_flowring_create(struct brcmf_flowring *flow, u8 da[ETH_ALEN],
u8 prio, u8 ifidx);
brcmfmac: Increase nr of supported flowrings. New generation devices have firmware which has more than 256 flowrings. E.g. following debugging message comes from 14e4:4365 BCM4366: [ 194.606245] brcmfmac: brcmf_pcie_init_ringbuffers Nr of flowrings is 264 At various code places (related to flowrings) we were using u8 which could lead to storing wrong number or infinite loops when indexing with this type. This issue was quite easy to spot in brcmf_flowring_detach where it led to infinite loop e.g. on failed initialization. This patch switches code to proper types and increases the maximum number of supported flowrings to 512. Originally this change was sent in September 2015, but back it was causing a regression on BCM43602 resulting in: Unable to handle kernel NULL pointer dereference at virtual address ... The reason for this regression was missing update (s/u8/u16) of struct brcmf_flowring_ring. This problem was handled in 9f64df9 ("brcmfmac: Fix bug in flowring management."). Starting with that it's safe to apply this original patch as it doesn't cause a regression anymore. This patch fixes an infinite loop on BCM4366 which is supported since 4.4 so it makes sense to apply it to stable 4.4+. Cc: <stable@vger.kernel.org> # 4.4+ Reviewed-by: Arend Van Spriel <arend@broadcom.com> Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com> Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com> Signed-off-by: Hante Meuleman <meuleman@broadcom.com> Signed-off-by: Arend van Spriel <arend@broadcom.com> Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
2016-02-08 00:00:30 +01:00
void brcmf_flowring_delete(struct brcmf_flowring *flow, u16 flowid);
void brcmf_flowring_open(struct brcmf_flowring *flow, u16 flowid);
u8 brcmf_flowring_tid(struct brcmf_flowring *flow, u16 flowid);
u32 brcmf_flowring_enqueue(struct brcmf_flowring *flow, u16 flowid,
struct sk_buff *skb);
brcmfmac: Increase nr of supported flowrings. New generation devices have firmware which has more than 256 flowrings. E.g. following debugging message comes from 14e4:4365 BCM4366: [ 194.606245] brcmfmac: brcmf_pcie_init_ringbuffers Nr of flowrings is 264 At various code places (related to flowrings) we were using u8 which could lead to storing wrong number or infinite loops when indexing with this type. This issue was quite easy to spot in brcmf_flowring_detach where it led to infinite loop e.g. on failed initialization. This patch switches code to proper types and increases the maximum number of supported flowrings to 512. Originally this change was sent in September 2015, but back it was causing a regression on BCM43602 resulting in: Unable to handle kernel NULL pointer dereference at virtual address ... The reason for this regression was missing update (s/u8/u16) of struct brcmf_flowring_ring. This problem was handled in 9f64df9 ("brcmfmac: Fix bug in flowring management."). Starting with that it's safe to apply this original patch as it doesn't cause a regression anymore. This patch fixes an infinite loop on BCM4366 which is supported since 4.4 so it makes sense to apply it to stable 4.4+. Cc: <stable@vger.kernel.org> # 4.4+ Reviewed-by: Arend Van Spriel <arend@broadcom.com> Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com> Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com> Signed-off-by: Hante Meuleman <meuleman@broadcom.com> Signed-off-by: Arend van Spriel <arend@broadcom.com> Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
2016-02-08 00:00:30 +01:00
struct sk_buff *brcmf_flowring_dequeue(struct brcmf_flowring *flow, u16 flowid);
void brcmf_flowring_reinsert(struct brcmf_flowring *flow, u16 flowid,
struct sk_buff *skb);
brcmfmac: Increase nr of supported flowrings. New generation devices have firmware which has more than 256 flowrings. E.g. following debugging message comes from 14e4:4365 BCM4366: [ 194.606245] brcmfmac: brcmf_pcie_init_ringbuffers Nr of flowrings is 264 At various code places (related to flowrings) we were using u8 which could lead to storing wrong number or infinite loops when indexing with this type. This issue was quite easy to spot in brcmf_flowring_detach where it led to infinite loop e.g. on failed initialization. This patch switches code to proper types and increases the maximum number of supported flowrings to 512. Originally this change was sent in September 2015, but back it was causing a regression on BCM43602 resulting in: Unable to handle kernel NULL pointer dereference at virtual address ... The reason for this regression was missing update (s/u8/u16) of struct brcmf_flowring_ring. This problem was handled in 9f64df9 ("brcmfmac: Fix bug in flowring management."). Starting with that it's safe to apply this original patch as it doesn't cause a regression anymore. This patch fixes an infinite loop on BCM4366 which is supported since 4.4 so it makes sense to apply it to stable 4.4+. Cc: <stable@vger.kernel.org> # 4.4+ Reviewed-by: Arend Van Spriel <arend@broadcom.com> Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com> Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com> Signed-off-by: Hante Meuleman <meuleman@broadcom.com> Signed-off-by: Arend van Spriel <arend@broadcom.com> Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
2016-02-08 00:00:30 +01:00
u32 brcmf_flowring_qlen(struct brcmf_flowring *flow, u16 flowid);
u8 brcmf_flowring_ifidx_get(struct brcmf_flowring *flow, u16 flowid);
struct brcmf_flowring *brcmf_flowring_attach(struct device *dev, u16 nrofrings);
void brcmf_flowring_detach(struct brcmf_flowring *flow);
void brcmf_flowring_configure_addr_mode(struct brcmf_flowring *flow, int ifidx,
enum proto_addr_mode addr_mode);
void brcmf_flowring_delete_peer(struct brcmf_flowring *flow, int ifidx,
u8 peer[ETH_ALEN]);
void brcmf_flowring_add_tdls_peer(struct brcmf_flowring *flow, int ifidx,
u8 peer[ETH_ALEN]);
#endif /* BRCMFMAC_FLOWRING_H */