netdev - [PATCH v3 net-next 03/16] sfc_ef100: register accesses on EF100

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Message-ID: <55c13c93-714e-e823-8fba-eabd9ae26f91@solarflare.com>
Date:   Thu, 16 Jul 2020 14:00:25 +0100
From:   Edward Cree <ecree@...arflare.com>
To:     <linux-net-drivers@...arflare.com>, <davem@...emloft.net>
CC:     <netdev@...r.kernel.org>
Subject: [PATCH v3 net-next 03/16] sfc_ef100: register accesses on EF100

EF100 adds a few new valid addresses for efx_writed_page(), as well as
 a Function Control Window in the BAR whose location is variable.

Signed-off-by: Edward Cree <ecree@...arflare.com>
---
 drivers/net/ethernet/sfc/io.h         | 16 +++++++++++++---
 drivers/net/ethernet/sfc/net_driver.h |  2 ++
 2 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/sfc/io.h b/drivers/net/ethernet/sfc/io.h
index c3c011bc6a68..30439cc83a89 100644
--- a/drivers/net/ethernet/sfc/io.h
+++ b/drivers/net/ethernet/sfc/io.h
@@ -75,6 +75,11 @@
 #endif
 #endif
 
+static inline u32 efx_reg(struct efx_nic *efx, unsigned int reg)
+{
+	return efx->reg_base + reg;
+}
+
 #ifdef EFX_USE_QWORD_IO
 static inline void _efx_writeq(struct efx_nic *efx, __le64 value,
 				  unsigned int reg)
@@ -217,8 +222,11 @@ static inline void efx_reado_table(struct efx_nic *efx, efx_oword_t *value,
 	efx_reado(efx, value, reg + index * sizeof(efx_oword_t));
 }
 
-/* default VI stride (step between per-VI registers) is 8K */
-#define EFX_DEFAULT_VI_STRIDE 0x2000
+/* default VI stride (step between per-VI registers) is 8K on EF10 and
+ * 64K on EF100
+ */
+#define EFX_DEFAULT_VI_STRIDE		0x2000
+#define EF100_DEFAULT_VI_STRIDE		0x10000
 
 /* Calculate offset to page-mapped register */
 static inline unsigned int efx_paged_reg(struct efx_nic *efx, unsigned int page,
@@ -265,7 +273,9 @@ _efx_writed_page(struct efx_nic *efx, const efx_dword_t *value,
 #define efx_writed_page(efx, value, reg, page)				\
 	_efx_writed_page(efx, value,					\
 			 reg +						\
-			 BUILD_BUG_ON_ZERO((reg) != 0x400 &&		\
+			 BUILD_BUG_ON_ZERO((reg) != 0x180 &&		\
+					   (reg) != 0x200 &&		\
+					   (reg) != 0x400 &&		\
 					   (reg) != 0x420 &&		\
 					   (reg) != 0x830 &&		\
 					   (reg) != 0x83c &&		\
diff --git a/drivers/net/ethernet/sfc/net_driver.h b/drivers/net/ethernet/sfc/net_driver.h
index 0bf11ebb03cf..5b3b3a976114 100644
--- a/drivers/net/ethernet/sfc/net_driver.h
+++ b/drivers/net/ethernet/sfc/net_driver.h
@@ -966,6 +966,7 @@ struct efx_async_filter_insertion {
  * @xdp_rxq_info_failed: Have any of the rx queues failed to initialise their
  *      xdp_rxq_info structures?
  * @mem_bar: The BAR that is mapped into membase.
+ * @reg_base: Offset from the start of the bar to the function control window.
  * @monitor_work: Hardware monitor workitem
  * @biu_lock: BIU (bus interface unit) lock
  * @last_irq_cpu: Last CPU to handle a possible test interrupt.  This
@@ -1144,6 +1145,7 @@ struct efx_nic {
 	bool xdp_rxq_info_failed;
 
 	unsigned int mem_bar;
+	u32 reg_base;
 
 	/* The following fields may be written more often */