From: Viktor Barna <[email protected]>
(Part of the split. Please, take a look at the cover letter for more
details).
Signed-off-by: Viktor Barna <[email protected]>
---
.../net/wireless/celeno/cl8k/enhanced_tim.c | 173 ++++++++++++++++++
1 file changed, 173 insertions(+)
create mode 100644 drivers/net/wireless/celeno/cl8k/enhanced_tim.c
diff --git a/drivers/net/wireless/celeno/cl8k/enhanced_tim.c b/drivers/net/wireless/celeno/cl8k/enhanced_tim.c
new file mode 100644
index 000000000000..893bddb2b25b
--- /dev/null
+++ b/drivers/net/wireless/celeno/cl8k/enhanced_tim.c
@@ -0,0 +1,173 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
+/* Copyright(c) 2019-2022, Celeno Communications Ltd. */
+
+#include "def.h"
+#include "hw.h"
+#include "sta.h"
+#include "enhanced_tim.h"
+
+/*
+ * The kernel's test_and_set_bit() gets unsigned long * as an argument, but we actually
+ * pass a pointer to u32, what cause to alignment fault in 64bit platforms.
+ * This function gets a pointer to u32 to prevent this alignment fault.
+ * Notice that the kernel's function sets the bit as an atomic operation,
+ * and our function doesn't. Vut it's not an issue since we set the bit from one context only.
+ */
+static int cl_test_and_set_bit(unsigned long nr, u32 *addr)
+{
+ u32 *new_addr, mask, old;
+
+ new_addr = ((u32 *)addr) + (nr >> 5);
+ mask = 1 << (nr & 31);
+ old = *new_addr & mask;
+ *new_addr |= mask;
+
+ return (old != 0);
+}
+
+static int cfm_test_and_clear_bit(unsigned long nr, u32 *addr)
+{
+ u32 *new_addr, mask, old;
+
+ new_addr = ((u32 *)addr) + (nr >> 5);
+ mask = 1 << (nr & 31);
+ old = *new_addr & mask;
+ *new_addr &= ~mask;
+
+ return (old != 0);
+}
+
+void cl_enhanced_tim_reset(struct cl_hw *cl_hw)
+{
+ /*
+ * There is no need to reset cl_hw->ipc_env->shared->enhanced_tim.
+ * It is done as part of ipc_shared_env_init()
+ */
+ memset(&cl_hw->ipc_env->enhanced_tim, 0, sizeof(struct cl_ipc_enhanced_tim));
+}
+
+/*
+ * NOTE: the UMAC DRAM starts with the enhanced TIM elements stractures.
+ * This is hard coded in the FW, this memory allocation should be changed in
+ * the driver module .ELF file.
+ */
+
+void cl_enhanced_tim_clear_tx_agg(struct cl_hw *cl_hw, u32 ipc_queue_idx,
+ u8 ac, struct cl_sta *cl_sta, u8 tid)
+{
+ /* Pointer to HOST enhanced TIM */
+ u32 *source = cl_hw->ipc_env->enhanced_tim.tx_rx_agg[ac];
+ u32 ipc_queue_idx_common = IPC_TX_QUEUE_IDX_TO_COMMON_QUEUE_IDX(ipc_queue_idx);
+ /*
+ * Does the UMAC enhanced TIM need update?
+ * If the TIM element is set then clear it and update the UMAC TIM element
+ */
+ if (cfm_test_and_clear_bit(ipc_queue_idx_common, source)) {
+ /* Pointer to UMAC enhanced TIM */
+ u32 __iomem *target =
+ (u32 __iomem *)cl_hw->ipc_env->shared->enhanced_tim.tx_rx_agg[ac];
+ /* Offset to UMAC encahned TIM array position */
+ u32 agg_offset = ipc_queue_idx_common / (BITS_PER_BYTE * sizeof(u32));
+
+ /* Update tim element */
+ if (cl_sta) {
+ struct sta_info *stainfo = IEEE80211_STA_TO_STAINFO(cl_sta->sta);
+
+ if (test_sta_flag(stainfo, WLAN_STA_PS_STA))
+ ieee80211_sta_set_buffered(cl_sta->sta, tid, false);
+ }
+
+ iowrite32(source[agg_offset], (void __iomem *)&target[agg_offset]);
+ }
+}
+
+void cl_enhanced_tim_clear_tx_single(struct cl_hw *cl_hw, u32 ipc_queue_idx, u8 ac,
+ bool no_ps_buffer, struct cl_sta *cl_sta, u8 tid)
+{
+ /* Pointer to HOST enhanced TIM */
+ u32 *source = cl_hw->ipc_env->enhanced_tim.tx_single[ac];
+ /* Staton index: 0 - 128 (do not use cl_sta->sta_idx which is 0 -127) */
+ u32 sta_idx = ipc_queue_idx % FW_MAX_NUM_STA;
+
+ /*
+ * Does the UMAC enhanced TIM need update?
+ * If the TIM element is set then clear it and update the UMAC TIM element
+ */
+ if (cfm_test_and_clear_bit(sta_idx, source)) {
+ /* Pointer to UMAC enhanced TIM for singles or aggregation */
+ u32 __iomem *target =
+ (u32 __iomem *)cl_hw->ipc_env->shared->enhanced_tim.tx_single[ac];
+ /* Offset to UMAC encahned TIM array position */
+ u32 sta_offset = sta_idx / (BITS_PER_BYTE * sizeof(u32));
+
+ /* Update tim element */
+ if (!no_ps_buffer && cl_sta) {
+ struct sta_info *stainfo = IEEE80211_STA_TO_STAINFO(cl_sta->sta);
+
+ if (test_sta_flag(stainfo, WLAN_STA_PS_STA))
+ ieee80211_sta_set_buffered(cl_sta->sta, tid, false);
+ }
+
+ iowrite32(source[sta_offset], (void __iomem *)&target[sta_offset]);
+ }
+}
+
+void cl_enhanced_tim_set_tx_agg(struct cl_hw *cl_hw, u32 ipc_queue_idx, u8 ac,
+ bool no_ps_buffer, struct cl_sta *cl_sta, u8 tid)
+{
+ /* Pointer to HOST enhanced TIM */
+ u32 *source = cl_hw->ipc_env->enhanced_tim.tx_rx_agg[ac];
+ u32 ipc_queue_idx_common = IPC_TX_QUEUE_IDX_TO_COMMON_QUEUE_IDX(ipc_queue_idx);
+ /*
+ * Does the UMAC enhanced TIM need update?
+ * If the TIM element is cleared then set it and update the UMAC TIM element
+ */
+ if (!cl_test_and_set_bit(ipc_queue_idx_common, source)) {
+ /* Pointer to UMAC enhanced TIM */
+ u32 __iomem *target =
+ (u32 __iomem *)cl_hw->ipc_env->shared->enhanced_tim.tx_rx_agg[ac];
+ /* Offset to UMAC encahned TIM array position */
+ u32 agg_offset = ipc_queue_idx_common / (BITS_PER_BYTE * sizeof(u32));
+
+ /* Update tim element */
+ if (!no_ps_buffer && cl_sta) {
+ struct sta_info *stainfo = IEEE80211_STA_TO_STAINFO(cl_sta->sta);
+
+ if (test_sta_flag(stainfo, WLAN_STA_PS_STA))
+ ieee80211_sta_set_buffered(cl_sta->sta, tid, true);
+ }
+
+ iowrite32(source[agg_offset], (void __iomem *)&target[agg_offset]);
+ }
+}
+
+void cl_enhanced_tim_set_tx_single(struct cl_hw *cl_hw, u32 ipc_queue_idx, u8 ac,
+ bool no_ps_buffer, struct cl_sta *cl_sta, u8 tid)
+{
+ /* Pointer to HOST enhanced TIM */
+ u32 *source = cl_hw->ipc_env->enhanced_tim.tx_single[ac];
+ /* Staton index: 0 - 128 (do not use cl_sta->sta_idx which is 0 -127) */
+ u32 sta_idx = ipc_queue_idx % FW_MAX_NUM_STA;
+
+ /*
+ * Does the UMAC enhanced TIM need update?
+ * If the TIM element is cleared then set it and update the UMAC TIM element
+ */
+ if (!cl_test_and_set_bit(sta_idx, source)) {
+ /* Pointer to UMAC enhanced TIM */
+ u32 __iomem *target =
+ (u32 __iomem *)cl_hw->ipc_env->shared->enhanced_tim.tx_single[ac];
+ /* Offset to UMAC encahned TIM array position */
+ u32 sta_offset = sta_idx / (BITS_PER_BYTE * sizeof(u32));
+
+ /* Update tim element */
+ if (!no_ps_buffer && cl_sta) {
+ struct sta_info *stainfo = IEEE80211_STA_TO_STAINFO(cl_sta->sta);
+
+ if (test_sta_flag(stainfo, WLAN_STA_PS_STA))
+ ieee80211_sta_set_buffered(cl_sta->sta, tid, true);
+ }
+
+ iowrite32(source[sta_offset], (void __iomem *)&target[sta_offset]);
+ }
+}
--
2.36.1