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Date: Tue, 26 Feb 2019 20:19:31 -0800
From: Jakub Kicinski <jakub.kicinski@...ronome.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org, oss-drivers@...ronome.com,
Jakub Kicinski <jakub.kicinski@...ronome.com>
Subject: [PATCH net-next 3/5] nfp: nsp: move default buffer handling into its own function
DMA version of NSP communication is coming, move the code which
copies data into the NFP buffer into a separate function.
Signed-off-by: Jakub Kicinski <jakub.kicinski@...ronome.com>
Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@...ronome.com>
---
.../ethernet/netronome/nfp/nfpcore/nfp_nsp.c | 93 ++++++++++---------
1 file changed, 51 insertions(+), 42 deletions(-)
diff --git a/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nsp.c b/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nsp.c
index 22208b03ff49..28262b0fc89a 100644
--- a/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nsp.c
+++ b/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nsp.c
@@ -122,16 +122,14 @@ struct nfp_nsp {
* @code: NFP SP Command Code
* @timeout_sec:Timeout value to wait for completion in seconds
* @option: NFP SP Command Argument
- * @buff_cpp: NFP SP Buffer CPP Address info
- * @buff_addr: NFP SP Buffer Host address
+ * @buf: NFP SP Buffer Address
* @error_cb: Callback for interpreting option if error occurred
*/
struct nfp_nsp_command_arg {
u16 code;
unsigned int timeout_sec;
u32 option;
- u32 buff_cpp;
- u64 buff_addr;
+ u64 buf;
void (*error_cb)(struct nfp_nsp *state, u32 ret_val);
};
@@ -345,16 +343,7 @@ __nfp_nsp_command(struct nfp_nsp *state, const struct nfp_nsp_command_arg *arg)
if (err)
return err;
- if (!FIELD_FIT(NSP_BUFFER_CPP, arg->buff_cpp >> 8) ||
- !FIELD_FIT(NSP_BUFFER_ADDRESS, arg->buff_addr)) {
- nfp_err(cpp, "Host buffer out of reach %08x %016llx\n",
- arg->buff_cpp, arg->buff_addr);
- return -EINVAL;
- }
-
- err = nfp_cpp_writeq(cpp, nsp_cpp, nsp_buffer,
- FIELD_PREP(NSP_BUFFER_CPP, arg->buff_cpp >> 8) |
- FIELD_PREP(NSP_BUFFER_ADDRESS, arg->buff_addr));
+ err = nfp_cpp_writeq(cpp, nsp_cpp, nsp_buffer, arg->buf);
if (err < 0)
return err;
@@ -412,36 +401,14 @@ static int nfp_nsp_command(struct nfp_nsp *state, u16 code)
}
static int
-nfp_nsp_command_buf(struct nfp_nsp *nsp, struct nfp_nsp_command_buf_arg *arg)
+nfp_nsp_command_buf_def(struct nfp_nsp *nsp,
+ struct nfp_nsp_command_buf_arg *arg)
{
- unsigned int def_size, max_size;
struct nfp_cpp *cpp = nsp->cpp;
u64 reg, cpp_buf;
- int ret, err;
+ int err, ret;
u32 cpp_id;
- if (nsp->ver.minor < 13) {
- nfp_err(cpp, "NSP: Code 0x%04x with buffer not supported (ABI %hu.%hu)\n",
- arg->arg.code, nsp->ver.major, nsp->ver.minor);
- return -EOPNOTSUPP;
- }
-
- err = nfp_cpp_readq(cpp, nfp_resource_cpp_id(nsp->res),
- nfp_resource_address(nsp->res) +
- NSP_DFLT_BUFFER_CONFIG,
- ®);
- if (err < 0)
- return err;
-
- max_size = max(arg->in_size, arg->out_size);
- def_size = FIELD_GET(NSP_DFLT_BUFFER_SIZE_MB, reg) * SZ_1M +
- FIELD_GET(NSP_DFLT_BUFFER_SIZE_4KB, reg) * SZ_4K;
- if (def_size < max_size) {
- nfp_err(cpp, "NSP: default buffer too small for command 0x%04x (%u < %u)\n",
- arg->arg.code, def_size, max_size);
- return -EINVAL;
- }
-
err = nfp_cpp_readq(cpp, nfp_resource_cpp_id(nsp->res),
nfp_resource_address(nsp->res) +
NSP_DFLT_BUFFER,
@@ -460,15 +427,21 @@ nfp_nsp_command_buf(struct nfp_nsp *nsp, struct nfp_nsp_command_buf_arg *arg)
}
/* Zero out remaining part of the buffer */
if (arg->out_buf && arg->out_size && arg->out_size > arg->in_size) {
- memset(arg->out_buf, 0, arg->out_size - arg->in_size);
err = nfp_cpp_write(cpp, cpp_id, cpp_buf + arg->in_size,
arg->out_buf, arg->out_size - arg->in_size);
if (err < 0)
return err;
}
- arg->arg.buff_cpp = cpp_id;
- arg->arg.buff_addr = cpp_buf;
+ if (!FIELD_FIT(NSP_BUFFER_CPP, cpp_id >> 8) ||
+ !FIELD_FIT(NSP_BUFFER_ADDRESS, cpp_buf)) {
+ nfp_err(cpp, "Buffer out of reach %08x %016llx\n",
+ cpp_id, cpp_buf);
+ return -EINVAL;
+ }
+
+ arg->arg.buf = FIELD_PREP(NSP_BUFFER_CPP, cpp_id >> 8) |
+ FIELD_PREP(NSP_BUFFER_ADDRESS, cpp_buf);
ret = __nfp_nsp_command(nsp, &arg->arg);
if (ret < 0)
return ret;
@@ -483,6 +456,42 @@ nfp_nsp_command_buf(struct nfp_nsp *nsp, struct nfp_nsp_command_buf_arg *arg)
return ret;
}
+static int
+nfp_nsp_command_buf(struct nfp_nsp *nsp, struct nfp_nsp_command_buf_arg *arg)
+{
+ unsigned int def_size, max_size;
+ struct nfp_cpp *cpp = nsp->cpp;
+ u64 reg;
+ int err;
+
+ if (nsp->ver.minor < 13) {
+ nfp_err(cpp, "NSP: Code 0x%04x with buffer not supported (ABI %hu.%hu)\n",
+ arg->arg.code, nsp->ver.major, nsp->ver.minor);
+ return -EOPNOTSUPP;
+ }
+
+ err = nfp_cpp_readq(cpp, nfp_resource_cpp_id(nsp->res),
+ nfp_resource_address(nsp->res) +
+ NSP_DFLT_BUFFER_CONFIG,
+ ®);
+ if (err < 0)
+ return err;
+
+ /* Zero out undefined part of the out buffer */
+ if (arg->out_buf && arg->out_size && arg->out_size > arg->in_size)
+ memset(arg->out_buf, 0, arg->out_size - arg->in_size);
+
+ max_size = max(arg->in_size, arg->out_size);
+ def_size = FIELD_GET(NSP_DFLT_BUFFER_SIZE_MB, reg) * SZ_1M +
+ FIELD_GET(NSP_DFLT_BUFFER_SIZE_4KB, reg) * SZ_4K;
+ if (def_size >= max_size)
+ return nfp_nsp_command_buf_def(nsp, arg);
+
+ nfp_err(cpp, "NSP: default buffer too small for command 0x%04x (%u < %u)\n",
+ arg->arg.code, def_size, max_size);
+ return -EINVAL;
+}
+
int nfp_nsp_wait(struct nfp_nsp *state)
{
const unsigned long wait_until = jiffies + NFP_NSP_TIMEOUT_BOOT * HZ;
--
2.19.2
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