net: ipa: start creating GSI register definitions

Create a new register definition file in the "reg" subdirectory,
and begin populating it with GSI register definitions based on IPA
version.  The GSI registers haven't changed much, so several IPA
versions can share the same GSI register definitions.

As with IPA registers, an array of pointers indexed by GSI register ID
refers to these register definitions, and a new "regs" field in the
GSI structure is initialized in gsi_reg_init() to refer to register
information based on the IPA version (though for now there's only
one).  The new function gsi_reg() returns register information for
a given GSI register, and the result can be used to look up that
register's offset.

This patch is meant only to put the infrastructure in place, so only
eon register (CH_C_QOS) is defined for each version, and only the
offset and stride are defined for that register.  Use new function
gsi_reg() to look up that register's information to get its offset,
This makes the GSI_CH_C_QOS_OFFSET() unnecessary, so get rid of it.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 1 deletions

diff --git a/drivers/net/ipa/gsi.c b/drivers/net/ipa/gsi.c
index a000bef49f8e..f07b7554d21f 100644
--- a/drivers/net/ipa/gsi.c
+++ b/drivers/net/ipa/gsi.c
@@ -16,6 +16,7 @@
 #include <linux/netdevice.h>
 
 #include "gsi.h"
+#include "reg.h"
 #include "gsi_reg.h"
 #include "gsi_private.h"
 #include "gsi_trans.h"
@@ -796,6 +797,7 @@ static void gsi_channel_program(struct gsi_channel *channel, bool doorbell)
 	union gsi_channel_scratch scr = { };
 	struct gsi_channel_scratch_gpi *gpi;
 	struct gsi *gsi = channel->gsi;
+	const struct reg *reg;
 	u32 wrr_weight = 0;
 	u32 val;
 
@@ -819,6 +821,8 @@ static void gsi_channel_program(struct gsi_channel *channel, bool doorbell)
 	val = upper_32_bits(channel->tre_ring.addr);
 	iowrite32(val, gsi->virt + GSI_CH_C_CNTXT_3_OFFSET(channel_id));
 
+	reg = gsi_reg(gsi, CH_C_QOS);
+
 	/* Command channel gets low weighted round-robin priority */
 	if (channel->command)
 		wrr_weight = field_max(WRR_WEIGHT_FMASK);
@@ -845,7 +849,7 @@ static void gsi_channel_program(struct gsi_channel *channel, bool doorbell)
 	if (gsi->version >= IPA_VERSION_4_9)
 		val |= DB_IN_BYTES;
 
-	iowrite32(val, gsi->virt + GSI_CH_C_QOS_OFFSET(channel_id));
+	iowrite32(val, gsi->virt + reg_n_offset(reg, channel_id));
 
 	/* Now update the scratch registers for GPI protocol */
 	gpi = &scr.gpi;