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path: root/drivers/net/ipa/gsi_reg.h
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Diffstat (limited to 'drivers/net/ipa/gsi_reg.h')
-rw-r--r--drivers/net/ipa/gsi_reg.h31
1 files changed, 13 insertions, 18 deletions
diff --git a/drivers/net/ipa/gsi_reg.h b/drivers/net/ipa/gsi_reg.h
index 0e138bbd8205..1622d8cf8dea 100644
--- a/drivers/net/ipa/gsi_reg.h
+++ b/drivers/net/ipa/gsi_reg.h
@@ -1,7 +1,7 @@
/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (c) 2015-2018, The Linux Foundation. All rights reserved.
- * Copyright (C) 2018-2020 Linaro Ltd.
+ * Copyright (C) 2018-2021 Linaro Ltd.
*/
#ifndef _GSI_REG_H_
#define _GSI_REG_H_
@@ -38,17 +38,21 @@
* (though the actual limit is hardware-dependent).
*/
-/* GSI EE registers as a group are shifted downward by a fixed
- * constant amount for IPA versions 4.5 and beyond. This applies
- * to all GSI registers we use *except* the ones that disable
- * inter-EE interrupts for channels and event channels.
+/* GSI EE registers as a group are shifted downward by a fixed constant amount
+ * for IPA versions 4.5 and beyond. This applies to all GSI registers we use
+ * *except* the ones that disable inter-EE interrupts for channels and event
+ * channels.
*
- * We handle this by adjusting the pointer to the mapped GSI memory
- * region downward. Then in the one place we use them (gsi_irq_setup())
- * we undo that adjustment for the inter-EE interrupt registers.
+ * The "raw" (not adjusted) GSI register range is mapped, and a pointer to
+ * the mapped range is held in gsi->virt_raw. The inter-EE interrupt
+ * registers are accessed using that pointer.
+ *
+ * Most registers are accessed using gsi->virt, which is a copy of the "raw"
+ * pointer, adjusted downward by the fixed amount.
*/
#define GSI_EE_REG_ADJUST 0x0000d000 /* IPA v4.5+ */
+/* The two inter-EE IRQ register offsets are relative to gsi->virt_raw */
#define GSI_INTER_EE_SRC_CH_IRQ_OFFSET \
GSI_INTER_EE_N_SRC_CH_IRQ_OFFSET(GSI_EE_AP)
#define GSI_INTER_EE_N_SRC_CH_IRQ_OFFSET(ee) \
@@ -59,16 +63,7 @@
#define GSI_INTER_EE_N_SRC_EV_CH_IRQ_OFFSET(ee) \
(0x0000c01c + 0x1000 * (ee))
-#define GSI_INTER_EE_SRC_CH_IRQ_CLR_OFFSET \
- GSI_INTER_EE_N_SRC_CH_IRQ_CLR_OFFSET(GSI_EE_AP)
-#define GSI_INTER_EE_N_SRC_CH_IRQ_CLR_OFFSET(ee) \
- (0x0000c028 + 0x1000 * (ee))
-
-#define GSI_INTER_EE_SRC_EV_CH_IRQ_CLR_OFFSET \
- GSI_INTER_EE_N_SRC_EV_CH_IRQ_CLR_OFFSET(GSI_EE_AP)
-#define GSI_INTER_EE_N_SRC_EV_CH_IRQ_CLR_OFFSET(ee) \
- (0x0000c02c + 0x1000 * (ee))
-
+/* All other register offsets are relative to gsi->virt */
#define GSI_CH_C_CNTXT_0_OFFSET(ch) \
GSI_EE_N_CH_C_CNTXT_0_OFFSET((ch), GSI_EE_AP)
#define GSI_EE_N_CH_C_CNTXT_0_OFFSET(ch, ee) \