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Date: Thu, 11 Dec 2014 15:21:27 -0500
From: Murali Karicheri <m-karicheri2@...com>
To: Joe Perches <joe@...ches.com>
CC: David Miller <davem@...emloft.net>, <netdev@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
<robh+dt@...nel.org>, <grant.likely@...aro.org>,
WingMan Kwok <w-kwok2@...com>
Subject: Re: [PATCH v7 2/3] net: Add Keystone NetCP ethernet driver
On 12/11/2014 01:34 PM, Joe Perches wrote:
> On Thu, 2014-12-11 at 12:17 -0500, Murali Karicheri wrote:
>> On 12/11/2014 12:01 PM, David Miller wrote:
>>> From: Murali Karicheri<m-karicheri2@...com>
>>> Date: Thu, 11 Dec 2014 09:14:37 -0500
>>>
>>>> BTW, could you provide any suggestions that would help us merge this
>>>> series to upstream? This has been sitting on this list for a while
>>>> now.
>>>
>>> You simply have to continue going through the review and revision
>>> process until people no longer find problems with your changes.
>>>
>>> This could take several more weeks, you simply must be patient.
>>
>> Ok. Thanks. That is encouraging to hear!
>
> Perhaps these trivial things might be considered
Joe, David,
I will address the comments and repost a new version.
Murali
>
> (uncompiled)
> ---
> drivers/net/ethernet/ti/netcp_core.c | 2 +-
> drivers/net/ethernet/ti/netcp_ethss.c | 83 +++++++++++++++++---------------
> drivers/net/ethernet/ti/netcp_xgbepcsr.c | 48 +++++++++---------
> 3 files changed, 71 insertions(+), 62 deletions(-)
>
> diff --git a/drivers/net/ethernet/ti/netcp_core.c b/drivers/net/ethernet/ti/netcp_core.c
> index 60ad299..8f38fe8 100644
> --- a/drivers/net/ethernet/ti/netcp_core.c
> +++ b/drivers/net/ethernet/ti/netcp_core.c
> @@ -1094,7 +1094,7 @@ static void netcp_tx_notify(void *arg)
> napi_schedule(&netcp->tx_napi);
> }
>
> -static struct knav_dma_desc*
> +static struct knav_dma_desc *
> netcp_tx_map_skb(struct sk_buff *skb, struct netcp_intf *netcp)
> {
> struct knav_dma_desc *desc, *ndesc, *pdesc;
> diff --git a/drivers/net/ethernet/ti/netcp_ethss.c b/drivers/net/ethernet/ti/netcp_ethss.c
> index 036b886..3757957 100644
> --- a/drivers/net/ethernet/ti/netcp_ethss.c
> +++ b/drivers/net/ethernet/ti/netcp_ethss.c
> @@ -486,21 +486,29 @@ struct netcp_ethtool_stat {
> int offset;
> };
>
> -#define GBE_STATSA_INFO(field) "GBE_A:"#field, GBE_STATSA_MODULE,\
> - FIELD_SIZEOF(struct gbe_hw_stats, field), \
> - offsetof(struct gbe_hw_stats, field)
> -
> -#define GBE_STATSB_INFO(field) "GBE_B:"#field, GBE_STATSB_MODULE,\
> - FIELD_SIZEOF(struct gbe_hw_stats, field), \
> - offsetof(struct gbe_hw_stats, field)
> -
> -#define GBE_STATSC_INFO(field) "GBE_C:"#field, GBE_STATSC_MODULE,\
> - FIELD_SIZEOF(struct gbe_hw_stats, field), \
> - offsetof(struct gbe_hw_stats, field)
> -
> -#define GBE_STATSD_INFO(field) "GBE_D:"#field, GBE_STATSD_MODULE,\
> - FIELD_SIZEOF(struct gbe_hw_stats, field), \
> - offsetof(struct gbe_hw_stats, field)
> +#define GBE_STATSA_INFO(field) \
> + .desc = "GBE_A:"#field, \
> + .type = GBE_STATSA_MODULE, \
> + .size = FIELD_SIZEOF(struct gbe_hw_stats, field), \
> + .offset = offsetof(struct gbe_hw_stats, field)
> +
> +#define GBE_STATSB_INFO(field) \
> + .desc = "GBE_B:"#field, \
> + .type = GBE_STATSB_MODULE, \
> + .size = FIELD_SIZEOF(struct gbe_hw_stats, field), \
> + .offset = offsetof(struct gbe_hw_stats, field)
> +
> +#define GBE_STATSC_INFO(field) \
> + .desc = "GBE_C:"#field, \
> + .type = GBE_STATSC_MODULE, \
> + .size = FIELD_SIZEOF(struct gbe_hw_stats, field), \
> + .offset = offsetof(struct gbe_hw_stats, field)
> +
> +#define GBE_STATSD_INFO(field) \
> + .desc = "GBE_D:"#field, \
> + .type = GBE_STATSD_MODULE, \
> + .size = FIELD_SIZEOF(struct gbe_hw_stats, field), \
> + .offset = offsetof(struct gbe_hw_stats, field)
>
> static const struct netcp_ethtool_stat gbe13_et_stats[] = {
> /* GBE module A */
> @@ -645,17 +653,23 @@ static const struct netcp_ethtool_stat gbe13_et_stats[] = {
> {GBE_STATSD_INFO(rx_dma_overruns)},
> };
>
> -#define XGBE_STATS0_INFO(field) "GBE_0:"#field, XGBE_STATS0_MODULE, \
> - FIELD_SIZEOF(struct xgbe_hw_stats, field), \
> - offsetof(struct xgbe_hw_stats, field)
> +#define XGBE_STATS0_INFO(field) \
> + .desc = "GBE_0:"#field, \
> + .type = GBE_STATS0_MODULE, \
> + .size = FIELD_SIZEOF(struct gbe_hw_stats, field), \
> + .offset = offsetof(struct gbe_hw_stats, field)
>
> -#define XGBE_STATS1_INFO(field) "GBE_1:"#field, XGBE_STATS1_MODULE, \
> - FIELD_SIZEOF(struct xgbe_hw_stats, field), \
> - offsetof(struct xgbe_hw_stats, field)
> +#define XGBE_STATS1_INFO(field) \
> + .desc = "GBE_1:"#field, \
> + .type = GBE_STATS1_MODULE, \
> + .size = FIELD_SIZEOF(struct gbe_hw_stats, field), \
> + .offset = offsetof(struct gbe_hw_stats, field)
>
> -#define XGBE_STATS2_INFO(field) "GBE_2:"#field, XGBE_STATS2_MODULE, \
> - FIELD_SIZEOF(struct xgbe_hw_stats, field), \
> - offsetof(struct xgbe_hw_stats, field)
> +#define XGBE_STATS2_INFO(field)
> + .desc = "GBE_2:"#field, \
> + .type = GBE_STATS2_MODULE, \
> + .size = FIELD_SIZEOF(struct gbe_hw_stats, field), \
> + .offset = offsetof(struct gbe_hw_stats, field)
>
> static const struct netcp_ethtool_stat xgbe10_et_stats[] = {
> /* GBE module 0 */
> @@ -883,11 +897,11 @@ static void gbe_update_stats_ver14(struct gbe_priv *gbe_dev, uint64_t *data)
> case GBE_STATSA_MODULE:
> case GBE_STATSC_MODULE:
> base = gbe_statsa;
> - break;
> + break;
> case GBE_STATSB_MODULE:
> case GBE_STATSD_MODULE:
> base = gbe_statsb;
> - break;
> + break;
> }
>
> p = base + gbe_dev->et_stats[j].offset;
> @@ -1639,11 +1653,8 @@ static void init_secondary_ports(struct gbe_priv *gbe_dev,
>
> for_each_child_of_node(node, port) {
> slave = devm_kzalloc(dev, sizeof(*slave), GFP_KERNEL);
> - if (!slave) {
> - dev_err(dev, "memomry alloc failed for secondary port(%s), skipping...\n",
> - port->name);
> + if (!slave)
> continue;
> - }
>
> if (init_slave(gbe_dev, slave, port)) {
> dev_err(dev, "Failed to initialize secondary port(%s), skipping...\n",
> @@ -1763,10 +1774,8 @@ static int set_xgbe_ethss10_priv(struct gbe_priv *gbe_dev,
> XGBE10_NUM_STAT_ENTRIES *
> XGBE10_NUM_SLAVES * sizeof(u64),
> GFP_KERNEL);
> - if (!gbe_dev->hw_stats) {
> - dev_err(gbe_dev->dev, "hw_stats memory allocation failed\n");
> + if (!gbe_dev->hw_stats)
> return -ENOMEM;
> - }
>
> gbe_dev->ss_version = XGBE_SS_VERSION_10;
> gbe_dev->sgmii_port_regs = gbe_dev->ss_regs +
> @@ -1836,10 +1845,8 @@ static int set_gbe_ethss14_priv(struct gbe_priv *gbe_dev,
> GBE13_NUM_HW_STAT_ENTRIES *
> GBE13_NUM_SLAVES * sizeof(u64),
> GFP_KERNEL);
> - if (!gbe_dev->hw_stats) {
> - dev_err(gbe_dev->dev, "hw_stats memory allocation failed\n");
> + if (!gbe_dev->hw_stats)
> return -ENOMEM;
> - }
>
> gbe_dev->ss_version = GBE_SS_VERSION_14;
> gbe_dev->sgmii_port_regs = regs + GBE13_SGMII_MODULE_OFFSET;
> @@ -1995,10 +2002,10 @@ static int gbe_probe(struct netcp_device *netcp_device, struct device *dev,
> dev_err(gbe_dev->dev, "error initializing ale engine\n");
> ret = -ENODEV;
> goto quit;
> - } else {
> - dev_dbg(gbe_dev->dev, "Created a gbe ale engine\n");
> }
>
> + dev_dbg(gbe_dev->dev, "Created a gbe ale engine\n");
> +
> /* initialize host port */
> gbe_init_host_port(gbe_dev);
>
> diff --git a/drivers/net/ethernet/ti/netcp_xgbepcsr.c b/drivers/net/ethernet/ti/netcp_xgbepcsr.c
> index 33571ac..d93a6a4 100644
> --- a/drivers/net/ethernet/ti/netcp_xgbepcsr.c
> +++ b/drivers/net/ethernet/ti/netcp_xgbepcsr.c
> @@ -14,6 +14,9 @@
> * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> * GNU General Public License for more details.
> */
> +
> +#define pr_fmt(fmt) "XGBE: " fmt
> +
> #include "netcp.h"
>
> /* XGBE registers */
> @@ -43,7 +46,7 @@ struct serdes_cfg {
> u32 mask;
> };
>
> -static struct serdes_cfg cfg_phyb_1p25g_156p25mhz_cmu0[] = {
> +static const struct serdes_cfg cfg_phyb_1p25g_156p25mhz_cmu0[] = {
> {0x0000, 0x00800002, 0x00ff00ff},
> {0x0014, 0x00003838, 0x0000ffff},
> {0x0060, 0x1c44e438, 0xffffffff},
> @@ -54,7 +57,7 @@ static struct serdes_cfg cfg_phyb_1p25g_156p25mhz_cmu0[] = {
> {0x0000, 0x00000003, 0x000000ff},
> };
>
> -static struct serdes_cfg cfg_phyb_10p3125g_156p25mhz_cmu1[] = {
> +static const struct serdes_cfg cfg_phyb_10p3125g_156p25mhz_cmu1[] = {
> {0x0c00, 0x00030002, 0x00ff00ff},
> {0x0c14, 0x00005252, 0x0000ffff},
> {0x0c28, 0x80000000, 0xff000000},
> @@ -76,7 +79,7 @@ static struct serdes_cfg cfg_phyb_10p3125g_156p25mhz_cmu1[] = {
> {0x0c00, 0x00000003, 0x000000ff},
> };
>
> -static struct serdes_cfg cfg_phyb_10p3125g_16bit_lane[] = {
> +static const struct serdes_cfg cfg_phyb_10p3125g_16bit_lane[] = {
> {0x0204, 0x00000080, 0x000000ff},
> {0x0208, 0x0000920d, 0x0000ffff},
> {0x0204, 0xfc000000, 0xff000000},
> @@ -106,7 +109,7 @@ static struct serdes_cfg cfg_phyb_10p3125g_16bit_lane[] = {
> {0x03cc, 0x00000000, 0x000000ff},
> };
>
> -static struct serdes_cfg cfg_phyb_10p3125g_comlane[] = {
> +static const struct serdes_cfg cfg_phyb_10p3125g_comlane[] = {
> {0x0a00, 0x00000800, 0x0000ff00},
> {0x0a84, 0x00000000, 0x000000ff},
> {0x0a8c, 0x00130000, 0x00ff0000},
> @@ -124,7 +127,7 @@ static struct serdes_cfg cfg_phyb_10p3125g_comlane[] = {
> {0x0ac0, 0x0000008b, 0x000000ff},
> };
>
> -static struct serdes_cfg cfg_cm_c1_c2[] = {
> +static const struct serdes_cfg cfg_cm_c1_c2[] = {
> {0x0208, 0x00000000, 0x00000f00},
> {0x0208, 0x00000000, 0x0000001f},
> {0x0204, 0x00000000, 0x00040000},
> @@ -185,8 +188,8 @@ static void netcp_xgbe_serdes_com_enable(void __iomem *serdes_regs)
> }
> }
>
> -static void netcp_xgbe_serdes_lane_enable(
> - void __iomem *serdes_regs, int lane)
> +static void netcp_xgbe_serdes_lane_enable(void __iomem *serdes_regs,
> + int lane)
> {
> /* Set Lane Control Rate */
> writel(0xe0e9e038, serdes_regs + 0x1fe0 + (4 * lane));
> @@ -230,7 +233,7 @@ static int netcp_xgbe_wait_pll_locked(void __iomem *sw_regs)
> cpu_relax();
> } while (true);
>
> - pr_err("XGBE serdes not locked: time out.\n");
> + pr_err("serdes not locked: time out\n");
> return ret;
> }
>
> @@ -292,8 +295,7 @@ static void netcp_xgbe_serdes_reset_cdr(void __iomem *serdes_regs,
> u32 tmp, dlpf, tbus;
>
> /*Get the DLPF values */
> - tmp = netcp_xgbe_serdes_read_select_tbus(
> - serdes_regs, lane + 1, 5);
> + tmp = netcp_xgbe_serdes_read_select_tbus(serdes_regs, lane + 1, 5);
>
> dlpf = tmp>> 2;
>
> @@ -302,10 +304,10 @@ static void netcp_xgbe_serdes_reset_cdr(void __iomem *serdes_regs,
> mdelay(1);
> reg_rmw(sig_detect_reg, VAL_SH(0, 1), MASK_WID_SH(2, 1));
> } else {
> - tbus = netcp_xgbe_serdes_read_select_tbus(serdes_regs, lane +
> - 1, 0xe);
> + tbus = netcp_xgbe_serdes_read_select_tbus(serdes_regs,
> + lane + 1, 0xe);
>
> - pr_debug("XGBE: CDR centered, DLPF: %4d,%d,%d.\n",
> + pr_debug("CDR centered, DLPF: %4d,%d,%d\n",
> tmp>> 2, tmp& 3, (tbus>> 2)& 3);
> }
> }
> @@ -340,13 +342,13 @@ static int netcp_xgbe_check_link_status(void __iomem *serdes_regs,
> case 0:
> /* if good link lock the signal detect ON! */
> if (!loss&& blk_lock) {
> - pr_debug("XGBE PCSR Linked Lane: %d\n", i);
> + pr_debug("PCSR Linked Lane: %d\n", i);
> reg_rmw(sig_detect_reg, VAL_SH(3, 1),
> MASK_WID_SH(2, 1));
> current_state[i] = 1;
> } else if (!blk_lock) {
> /* if no lock, then reset CDR */
> - pr_debug("XGBE PCSR Recover Lane: %d\n", i);
> + pr_debug("PCSR Recover Lane: %d\n", i);
> netcp_xgbe_serdes_reset_cdr(serdes_regs,
> sig_detect_reg, i);
> }
> @@ -361,10 +363,10 @@ static int netcp_xgbe_check_link_status(void __iomem *serdes_regs,
> break;
>
> case 2:
> - if (blk_lock)
> + if (blk_lock) {
> /* Nope just noise */
> current_state[i] = 1;
> - else {
> + } else {
> /* Lost the block lock, reset CDR if it is
> * not centered and go back to sync state
> */
> @@ -375,7 +377,7 @@ static int netcp_xgbe_check_link_status(void __iomem *serdes_regs,
> break;
>
> default:
> - pr_err("XGBE: unknown current_state[%d] %d\n",
> + pr_err("unknown current_state[%d] %d\n",
> i, current_state[i]);
> break;
> }
> @@ -417,19 +419,19 @@ static int netcp_xgbe_serdes_check_lane(void __iomem *serdes_regs,
> break;
>
> if (lane_down[0])
> - pr_debug("XGBE: detected link down on lane 0\n");
> + pr_debug("detected link down on lane 0\n");
>
> if (lane_down[1])
> - pr_debug("XGBE: detected link down on lane 1\n");
> + pr_debug("detected link down on lane 1\n");
>
> if (++retries> 1) {
> - pr_debug("XGBE: timeout waiting for serdes link up\n");
> + pr_debug("timeout waiting for serdes link up\n");
> return -ETIMEDOUT;
> }
> mdelay(100);
> } while (!link_up);
>
> - pr_debug("XGBE: PCSR link is up\n");
> + pr_debug("PCSR link is up\n");
> return 0;
> }
>
> @@ -494,7 +496,7 @@ int netcp_xgbe_serdes_init(void __iomem *serdes_regs, void __iomem *xgbe_regs)
> /* read COMLANE bits 4:0 */
> val = readl(serdes_regs + 0xa00);
> if (val& 0x1f) {
> - pr_debug("XGBE: serdes already in operation - reset\n");
> + pr_debug("serdes already in operation - reset\n");
> netcp_xgbe_reset_serdes(serdes_regs);
> }
> return netcp_xgbe_serdes_config(serdes_regs, xgbe_regs);
>
>
>
--
Murali Karicheri
Linux Kernel, Texas Instruments
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