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iwlwifi: abstract out missing SEQ_RX_FRAME workaround

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Mohammed Shafi ran into [1] the SEQ_RX_FRAME workaround
warning with a statistics notification, this means we
can't just remove it as we'd hoped.

Abstract it out so that the higher layer can configure
this as a kind of "filter" in the transport.

[1] http://mid.gmane.org/CAD2nsn1_DzbRHuSbS_1rFNzuux_9pW1-pABEasQ01_y7-ndO5w@mail.gmail.com

Reported-by: Mohammed Shafi <shafi.wireless@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg 2012-03-10 13:00:07 -08:00 committed by John W. Linville
parent 10d8f31ebb
commit d663ee73f6
5 changed files with 39 additions and 18 deletions
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10
drivers/net/wireless/iwlwifi/iwl-agn.c
View file

@ -1186,6 +1186,14 @@ static struct iwl_op_mode *iwl_op_mode_dvm_start(struct iwl_trans *trans,
u16 num_mac;
u32 ucode_flags;
struct iwl_trans_config trans_cfg;
static const u8 no_reclaim_cmds[] = {
REPLY_RX_PHY_CMD,
REPLY_RX,
REPLY_RX_MPDU_CMD,
REPLY_COMPRESSED_BA,
STATISTICS_NOTIFICATION,
REPLY_TX,
};
/************************
* 1. Allocating HW data
@ -1211,6 +1219,8 @@ static struct iwl_op_mode *iwl_op_mode_dvm_start(struct iwl_trans *trans,
* to know about.
*/
trans_cfg.op_mode = op_mode;
trans_cfg.no_reclaim_cmds = no_reclaim_cmds;
trans_cfg.n_no_reclaim_cmds = ARRAY_SIZE(no_reclaim_cmds);
ucode_flags = fw->ucode_capa.flags;

2
drivers/net/wireless/iwlwifi/iwl-trans-pcie-int.h
View file

@ -291,6 +291,8 @@ struct iwl_trans_pcie {
wait_queue_head_t ucode_write_waitq;
unsigned long status;
u8 cmd_queue;
u8 n_no_reclaim_cmds;
u8 no_reclaim_cmds[MAX_NO_RECLAIM_CMDS];
};
#define IWL_TRANS_GET_PCIE_TRANS(_iwl_trans) \

29
drivers/net/wireless/iwlwifi/iwl-trans-pcie-rx.c
View file

@ -395,13 +395,17 @@ static void iwl_rx_handle_rxbuf(struct iwl_trans *trans,
* there is no command buffer to reclaim.
* Ucode should set SEQ_RX_FRAME bit if ucode-originated,
* but apparently a few don't get set; catch them here. */
reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
(pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
(pkt->hdr.cmd != REPLY_RX) &&
(pkt->hdr.cmd != REPLY_RX_MPDU_CMD) &&
(pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
(pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
(pkt->hdr.cmd != REPLY_TX);
reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME);
if (reclaim) {
int i;
for (i = 0; i < trans_pcie->n_no_reclaim_cmds; i++) {
if (trans_pcie->no_reclaim_cmds[i] == pkt->hdr.cmd) {
reclaim = false;
break;
}
}
}
sequence = le16_to_cpu(pkt->hdr.sequence);
index = SEQ_TO_INDEX(sequence);
@ -412,17 +416,6 @@ static void iwl_rx_handle_rxbuf(struct iwl_trans *trans,
else
cmd = NULL;
/* warn if this is cmd response / notification and the uCode
* didn't set the SEQ_RX_FRAME for a frame that is
* uCode-originated
* If you saw this code after the second half of 2012, then
* please remove it
*/
WARN(pkt->hdr.cmd != REPLY_TX && reclaim == false &&
(!(pkt->hdr.sequence & SEQ_RX_FRAME)),
"reclaim is false, SEQ_RX_FRAME unset: %s\n",
get_cmd_string(pkt->hdr.cmd));
err = iwl_op_mode_rx(trans->op_mode, &rxcb, cmd);
/*

7
drivers/net/wireless/iwlwifi/iwl-trans-pcie.c
View file

@ -1626,6 +1626,13 @@ static void iwl_trans_pcie_configure(struct iwl_trans *trans,
struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
trans_pcie->cmd_queue = trans_cfg->cmd_queue;
if (WARN_ON(trans_cfg->n_no_reclaim_cmds > MAX_NO_RECLAIM_CMDS))
trans_pcie->n_no_reclaim_cmds = 0;
else
trans_pcie->n_no_reclaim_cmds = trans_cfg->n_no_reclaim_cmds;
if (trans_pcie->n_no_reclaim_cmds)
memcpy(trans_pcie->no_reclaim_cmds, trans_cfg->no_reclaim_cmds,
trans_pcie->n_no_reclaim_cmds * sizeof(u8));
}
static void iwl_trans_pcie_free(struct iwl_trans *trans)

9
drivers/net/wireless/iwlwifi/iwl-trans.h
View file

@ -274,6 +274,8 @@ static inline struct page *rxb_steal_page(struct iwl_rx_cmd_buffer *r)
return p;
}
#define MAX_NO_RECLAIM_CMDS 6
/**
* struct iwl_trans_config - transport configuration
*
@ -281,10 +283,17 @@ static inline struct page *rxb_steal_page(struct iwl_rx_cmd_buffer *r)
* Must be set before any other call.
* @cmd_queue: the index of the command queue.
* Must be set before start_fw.
* @no_reclaim_cmds: Some devices erroneously don't set the
* SEQ_RX_FRAME bit on some notifications, this is the
* list of such notifications to filter. Max length is
* %MAX_NO_RECLAIM_CMDS.
* @n_no_reclaim_cmds: # of commands in list
*/
struct iwl_trans_config {
struct iwl_op_mode *op_mode;
u8 cmd_queue;
const u8 *no_reclaim_cmds;
int n_no_reclaim_cmds;
};
/**