sfc: Move MTD operations into efx_nic_type

Merge the per-NIC-type MTD probe selection and struct efx_mtd_ops into
struct efx_nic_type.  Move the implementations into the appropriate
source files.

Several NVRAM functions are now only called from MTD operations which
are now implemented in the same file (falcon.c or mcdi.c).  There is no
need for them to be extern, or to be defined at all if CONFIG_SFC_MTD
is not enabled, so move them into the #ifdef CONFIG_SFC_MTD sections
in those files.

Most of the SPI-related definitions are also only used in falcon.c,
so move them there.  Put the remainder of spi.h into nic.h (which
previously included it).
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>

drivers/net/ethernet/sfc/efx.h

@@ -204,7 +204,12 @@ extern void efx_port_dummy_op_void(struct efx_nic *efx);
 
 /* MTD */
 #ifdef CONFIG_SFC_MTD
-extern int efx_mtd_probe(struct efx_nic *efx);
+extern int efx_mtd_add(struct efx_nic *efx, struct efx_mtd_partition *parts,
+		       size_t n_parts, size_t sizeof_part);
+static inline int efx_mtd_probe(struct efx_nic *efx)
+{
+	return efx->type->mtd_probe(efx);
+}
 extern void efx_mtd_rename(struct efx_nic *efx);
 extern void efx_mtd_remove(struct efx_nic *efx);
 #else

drivers/net/ethernet/sfc/mcdi.c

@@ -811,125 +811,6 @@ int efx_mcdi_nvram_info(struct efx_nic *efx, unsigned int type,
 	return rc;
 }
 
-int efx_mcdi_nvram_update_start(struct efx_nic *efx, unsigned int type)
-{
-	MCDI_DECLARE_BUF(inbuf, MC_CMD_NVRAM_UPDATE_START_IN_LEN);
-	int rc;
-
-	MCDI_SET_DWORD(inbuf, NVRAM_UPDATE_START_IN_TYPE, type);
-
-	BUILD_BUG_ON(MC_CMD_NVRAM_UPDATE_START_OUT_LEN != 0);
-
-	rc = efx_mcdi_rpc(efx, MC_CMD_NVRAM_UPDATE_START, inbuf, sizeof(inbuf),
-			  NULL, 0, NULL);
-	if (rc)
-		goto fail;
-
-	return 0;
-
-fail:
-	netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
-	return rc;
-}
-
-int efx_mcdi_nvram_read(struct efx_nic *efx, unsigned int type,
-			loff_t offset, u8 *buffer, size_t length)
-{
-	MCDI_DECLARE_BUF(inbuf, MC_CMD_NVRAM_READ_IN_LEN);
-	MCDI_DECLARE_BUF(outbuf,
-			 MC_CMD_NVRAM_READ_OUT_LEN(EFX_MCDI_NVRAM_LEN_MAX));
-	size_t outlen;
-	int rc;
-
-	MCDI_SET_DWORD(inbuf, NVRAM_READ_IN_TYPE, type);
-	MCDI_SET_DWORD(inbuf, NVRAM_READ_IN_OFFSET, offset);
-	MCDI_SET_DWORD(inbuf, NVRAM_READ_IN_LENGTH, length);
-
-	rc = efx_mcdi_rpc(efx, MC_CMD_NVRAM_READ, inbuf, sizeof(inbuf),
-			  outbuf, sizeof(outbuf), &outlen);
-	if (rc)
-		goto fail;
-
-	memcpy(buffer, MCDI_PTR(outbuf, NVRAM_READ_OUT_READ_BUFFER), length);
-	return 0;
-
-fail:
-	netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
-	return rc;
-}
-
-int efx_mcdi_nvram_write(struct efx_nic *efx, unsigned int type,
-			   loff_t offset, const u8 *buffer, size_t length)
-{
-	MCDI_DECLARE_BUF(inbuf,
-			 MC_CMD_NVRAM_WRITE_IN_LEN(EFX_MCDI_NVRAM_LEN_MAX));
-	int rc;
-
-	MCDI_SET_DWORD(inbuf, NVRAM_WRITE_IN_TYPE, type);
-	MCDI_SET_DWORD(inbuf, NVRAM_WRITE_IN_OFFSET, offset);
-	MCDI_SET_DWORD(inbuf, NVRAM_WRITE_IN_LENGTH, length);
-	memcpy(MCDI_PTR(inbuf, NVRAM_WRITE_IN_WRITE_BUFFER), buffer, length);
-
-	BUILD_BUG_ON(MC_CMD_NVRAM_WRITE_OUT_LEN != 0);
-
-	rc = efx_mcdi_rpc(efx, MC_CMD_NVRAM_WRITE, inbuf,
-			  ALIGN(MC_CMD_NVRAM_WRITE_IN_LEN(length), 4),
-			  NULL, 0, NULL);
-	if (rc)
-		goto fail;
-
-	return 0;
-
-fail:
-	netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
-	return rc;
-}
-
-int efx_mcdi_nvram_erase(struct efx_nic *efx, unsigned int type,
-			 loff_t offset, size_t length)
-{
-	MCDI_DECLARE_BUF(inbuf, MC_CMD_NVRAM_ERASE_IN_LEN);
-	int rc;
-
-	MCDI_SET_DWORD(inbuf, NVRAM_ERASE_IN_TYPE, type);
-	MCDI_SET_DWORD(inbuf, NVRAM_ERASE_IN_OFFSET, offset);
-	MCDI_SET_DWORD(inbuf, NVRAM_ERASE_IN_LENGTH, length);
-
-	BUILD_BUG_ON(MC_CMD_NVRAM_ERASE_OUT_LEN != 0);
-
-	rc = efx_mcdi_rpc(efx, MC_CMD_NVRAM_ERASE, inbuf, sizeof(inbuf),
-			  NULL, 0, NULL);
-	if (rc)
-		goto fail;
-
-	return 0;
-
-fail:
-	netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
-	return rc;
-}
-
-int efx_mcdi_nvram_update_finish(struct efx_nic *efx, unsigned int type)
-{
-	MCDI_DECLARE_BUF(inbuf, MC_CMD_NVRAM_UPDATE_FINISH_IN_LEN);
-	int rc;
-
-	MCDI_SET_DWORD(inbuf, NVRAM_UPDATE_FINISH_IN_TYPE, type);
-
-	BUILD_BUG_ON(MC_CMD_NVRAM_UPDATE_FINISH_OUT_LEN != 0);
-
-	rc = efx_mcdi_rpc(efx, MC_CMD_NVRAM_UPDATE_FINISH, inbuf, sizeof(inbuf),
-			  NULL, 0, NULL);
-	if (rc)
-		goto fail;
-
-	return 0;
-
-fail:
-	netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
-	return rc;
-}
-
 static int efx_mcdi_nvram_test(struct efx_nic *efx, unsigned int type)
 {
 	MCDI_DECLARE_BUF(inbuf, MC_CMD_NVRAM_TEST_IN_LEN);
@@ -1272,3 +1153,236 @@ int efx_mcdi_wol_filter_reset(struct efx_nic *efx)
 	return rc;
 }
 
+#ifdef CONFIG_SFC_MTD
+
+#define EFX_MCDI_NVRAM_LEN_MAX 128
+
+static int efx_mcdi_nvram_update_start(struct efx_nic *efx, unsigned int type)
+{
+	MCDI_DECLARE_BUF(inbuf, MC_CMD_NVRAM_UPDATE_START_IN_LEN);
+	int rc;
+
+	MCDI_SET_DWORD(inbuf, NVRAM_UPDATE_START_IN_TYPE, type);
+
+	BUILD_BUG_ON(MC_CMD_NVRAM_UPDATE_START_OUT_LEN != 0);
+
+	rc = efx_mcdi_rpc(efx, MC_CMD_NVRAM_UPDATE_START, inbuf, sizeof(inbuf),
+			  NULL, 0, NULL);
+	if (rc)
+		goto fail;
+
+	return 0;
+
+fail:
+	netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
+	return rc;
+}
+
+static int efx_mcdi_nvram_read(struct efx_nic *efx, unsigned int type,
+			       loff_t offset, u8 *buffer, size_t length)
+{
+	MCDI_DECLARE_BUF(inbuf, MC_CMD_NVRAM_READ_IN_LEN);
+	MCDI_DECLARE_BUF(outbuf,
+			 MC_CMD_NVRAM_READ_OUT_LEN(EFX_MCDI_NVRAM_LEN_MAX));
+	size_t outlen;
+	int rc;
+
+	MCDI_SET_DWORD(inbuf, NVRAM_READ_IN_TYPE, type);
+	MCDI_SET_DWORD(inbuf, NVRAM_READ_IN_OFFSET, offset);
+	MCDI_SET_DWORD(inbuf, NVRAM_READ_IN_LENGTH, length);
+
+	rc = efx_mcdi_rpc(efx, MC_CMD_NVRAM_READ, inbuf, sizeof(inbuf),
+			  outbuf, sizeof(outbuf), &outlen);
+	if (rc)
+		goto fail;
+
+	memcpy(buffer, MCDI_PTR(outbuf, NVRAM_READ_OUT_READ_BUFFER), length);
+	return 0;
+
+fail:
+	netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
+	return rc;
+}
+
+static int efx_mcdi_nvram_write(struct efx_nic *efx, unsigned int type,
+				loff_t offset, const u8 *buffer, size_t length)
+{
+	MCDI_DECLARE_BUF(inbuf,
+			 MC_CMD_NVRAM_WRITE_IN_LEN(EFX_MCDI_NVRAM_LEN_MAX));
+	int rc;
+
+	MCDI_SET_DWORD(inbuf, NVRAM_WRITE_IN_TYPE, type);
+	MCDI_SET_DWORD(inbuf, NVRAM_WRITE_IN_OFFSET, offset);
+	MCDI_SET_DWORD(inbuf, NVRAM_WRITE_IN_LENGTH, length);
+	memcpy(MCDI_PTR(inbuf, NVRAM_WRITE_IN_WRITE_BUFFER), buffer, length);
+
+	BUILD_BUG_ON(MC_CMD_NVRAM_WRITE_OUT_LEN != 0);
+
+	rc = efx_mcdi_rpc(efx, MC_CMD_NVRAM_WRITE, inbuf,
+			  ALIGN(MC_CMD_NVRAM_WRITE_IN_LEN(length), 4),
+			  NULL, 0, NULL);
+	if (rc)
+		goto fail;
+
+	return 0;
+
+fail:
+	netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
+	return rc;
+}
+
+static int efx_mcdi_nvram_erase(struct efx_nic *efx, unsigned int type,
+				loff_t offset, size_t length)
+{
+	MCDI_DECLARE_BUF(inbuf, MC_CMD_NVRAM_ERASE_IN_LEN);
+	int rc;
+
+	MCDI_SET_DWORD(inbuf, NVRAM_ERASE_IN_TYPE, type);
+	MCDI_SET_DWORD(inbuf, NVRAM_ERASE_IN_OFFSET, offset);
+	MCDI_SET_DWORD(inbuf, NVRAM_ERASE_IN_LENGTH, length);
+
+	BUILD_BUG_ON(MC_CMD_NVRAM_ERASE_OUT_LEN != 0);
+
+	rc = efx_mcdi_rpc(efx, MC_CMD_NVRAM_ERASE, inbuf, sizeof(inbuf),
+			  NULL, 0, NULL);
+	if (rc)
+		goto fail;
+
+	return 0;
+
+fail:
+	netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
+	return rc;
+}
+
+static int efx_mcdi_nvram_update_finish(struct efx_nic *efx, unsigned int type)
+{
+	MCDI_DECLARE_BUF(inbuf, MC_CMD_NVRAM_UPDATE_FINISH_IN_LEN);
+	int rc;
+
+	MCDI_SET_DWORD(inbuf, NVRAM_UPDATE_FINISH_IN_TYPE, type);
+
+	BUILD_BUG_ON(MC_CMD_NVRAM_UPDATE_FINISH_OUT_LEN != 0);
+
+	rc = efx_mcdi_rpc(efx, MC_CMD_NVRAM_UPDATE_FINISH, inbuf, sizeof(inbuf),
+			  NULL, 0, NULL);
+	if (rc)
+		goto fail;
+
+	return 0;
+
+fail:
+	netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
+	return rc;
+}
+
+int efx_mcdi_mtd_read(struct mtd_info *mtd, loff_t start,
+		      size_t len, size_t *retlen, u8 *buffer)
+{
+	struct efx_mcdi_mtd_partition *part = to_efx_mcdi_mtd_partition(mtd);
+	struct efx_nic *efx = mtd->priv;
+	loff_t offset = start;
+	loff_t end = min_t(loff_t, start + len, mtd->size);
+	size_t chunk;
+	int rc = 0;
+
+	while (offset < end) {
+		chunk = min_t(size_t, end - offset, EFX_MCDI_NVRAM_LEN_MAX);
+		rc = efx_mcdi_nvram_read(efx, part->nvram_type, offset,
+					 buffer, chunk);
+		if (rc)
+			goto out;
+		offset += chunk;
+		buffer += chunk;
+	}
+out:
+	*retlen = offset - start;
+	return rc;
+}
+
+int efx_mcdi_mtd_erase(struct mtd_info *mtd, loff_t start, size_t len)
+{
+	struct efx_mcdi_mtd_partition *part = to_efx_mcdi_mtd_partition(mtd);
+	struct efx_nic *efx = mtd->priv;
+	loff_t offset = start & ~((loff_t)(mtd->erasesize - 1));
+	loff_t end = min_t(loff_t, start + len, mtd->size);
+	size_t chunk = part->common.mtd.erasesize;
+	int rc = 0;
+
+	if (!part->updating) {
+		rc = efx_mcdi_nvram_update_start(efx, part->nvram_type);
+		if (rc)
+			goto out;
+		part->updating = true;
+	}
+
+	/* The MCDI interface can in fact do multiple erase blocks at once;
+	 * but erasing may be slow, so we make multiple calls here to avoid
+	 * tripping the MCDI RPC timeout. */
+	while (offset < end) {
+		rc = efx_mcdi_nvram_erase(efx, part->nvram_type, offset,
+					  chunk);
+		if (rc)
+			goto out;
+		offset += chunk;
+	}
+out:
+	return rc;
+}
+
+int efx_mcdi_mtd_write(struct mtd_info *mtd, loff_t start,
+		       size_t len, size_t *retlen, const u8 *buffer)
+{
+	struct efx_mcdi_mtd_partition *part = to_efx_mcdi_mtd_partition(mtd);
+	struct efx_nic *efx = mtd->priv;
+	loff_t offset = start;
+	loff_t end = min_t(loff_t, start + len, mtd->size);
+	size_t chunk;
+	int rc = 0;
+
+	if (!part->updating) {
+		rc = efx_mcdi_nvram_update_start(efx, part->nvram_type);
+		if (rc)
+			goto out;
+		part->updating = true;
+	}
+
+	while (offset < end) {
+		chunk = min_t(size_t, end - offset, EFX_MCDI_NVRAM_LEN_MAX);
+		rc = efx_mcdi_nvram_write(efx, part->nvram_type, offset,
+					  buffer, chunk);
+		if (rc)
+			goto out;
+		offset += chunk;
+		buffer += chunk;
+	}
+out:
+	*retlen = offset - start;
+	return rc;
+}
+
+int efx_mcdi_mtd_sync(struct mtd_info *mtd)
+{
+	struct efx_mcdi_mtd_partition *part = to_efx_mcdi_mtd_partition(mtd);
+	struct efx_nic *efx = mtd->priv;
+	int rc = 0;
+
+	if (part->updating) {
+		part->updating = false;
+		rc = efx_mcdi_nvram_update_finish(efx, part->nvram_type);
+	}
+
+	return rc;
+}
+
+void efx_mcdi_mtd_rename(struct efx_mtd_partition *part)
+{
+	struct efx_mcdi_mtd_partition *mcdi_part =
+		container_of(part, struct efx_mcdi_mtd_partition, common);
+	struct efx_nic *efx = part->mtd.priv;
+
+	snprintf(part->name, sizeof(part->name), "%s %s:%02x",
+		 efx->name, part->type_name, mcdi_part->fw_subtype);
+}
+
+#endif /* CONFIG_SFC_MTD */

drivers/net/ethernet/sfc/mcdi.h

@@ -65,6 +65,16 @@ struct efx_mcdi_mon {
 	unsigned int n_attrs;
 };
 
+struct efx_mcdi_mtd_partition {
+	struct efx_mtd_partition common;
+	bool updating;
+	u8 nvram_type;
+	u16 fw_subtype;
+};
+
+#define to_efx_mcdi_mtd_partition(mtd)				\
+	container_of(mtd, struct efx_mcdi_mtd_partition, common.mtd)
+
 /**
  * struct efx_mcdi_data - extra state for NICs that implement MCDI
  * @iface: Interface/protocol state
@@ -250,18 +260,6 @@ extern int efx_mcdi_nvram_types(struct efx_nic *efx, u32 *nvram_types_out);
 extern int efx_mcdi_nvram_info(struct efx_nic *efx, unsigned int type,
 			       size_t *size_out, size_t *erase_size_out,
 			       bool *protected_out);
-extern int efx_mcdi_nvram_update_start(struct efx_nic *efx,
-				       unsigned int type);
-extern int efx_mcdi_nvram_read(struct efx_nic *efx, unsigned int type,
-			       loff_t offset, u8 *buffer, size_t length);
-extern int efx_mcdi_nvram_write(struct efx_nic *efx, unsigned int type,
-				loff_t offset, const u8 *buffer,
-				size_t length);
-#define EFX_MCDI_NVRAM_LEN_MAX 128
-extern int efx_mcdi_nvram_erase(struct efx_nic *efx, unsigned int type,
-				loff_t offset, size_t length);
-extern int efx_mcdi_nvram_update_finish(struct efx_nic *efx,
-					unsigned int type);
 extern int efx_mcdi_nvram_test_all(struct efx_nic *efx);
 extern int efx_mcdi_handle_assertion(struct efx_nic *efx);
 extern void efx_mcdi_set_id_led(struct efx_nic *efx, enum efx_led_mode mode);
@@ -291,4 +289,14 @@ static inline int efx_mcdi_mon_probe(struct efx_nic *efx) { return 0; }
 static inline void efx_mcdi_mon_remove(struct efx_nic *efx) {}
 #endif
 
+#ifdef CONFIG_SFC_MTD
+extern int efx_mcdi_mtd_read(struct mtd_info *mtd, loff_t start,
+			     size_t len, size_t *retlen, u8 *buffer);
+extern int efx_mcdi_mtd_erase(struct mtd_info *mtd, loff_t start, size_t len);
+extern int efx_mcdi_mtd_write(struct mtd_info *mtd, loff_t start,
+			      size_t len, size_t *retlen, const u8 *buffer);
+extern int efx_mcdi_mtd_sync(struct mtd_info *mtd);
+extern void efx_mcdi_mtd_rename(struct efx_mtd_partition *part);
+#endif
+
 #endif /* EFX_MCDI_H */

drivers/net/ethernet/sfc/net_driver.h

@@ -27,6 +27,7 @@
 #include <linux/mutex.h>
 #include <linux/vmalloc.h>
 #include <linux/i2c.h>
+#include <linux/mtd/mtd.h>
 
 #include "enum.h"
 #include "bitfield.h"
@@ -868,7 +869,6 @@ struct efx_nic {
 	struct delayed_work selftest_work;
 
 #ifdef CONFIG_SFC_MTD
-	const struct efx_mtd_ops *mtd_ops;
 	struct list_head mtd_list;
 #endif
 
@@ -954,6 +954,14 @@ static inline unsigned int efx_port_num(struct efx_nic *efx)
 	return efx->port_num;
 }
 
+struct efx_mtd_partition {
+	struct list_head node;
+	struct mtd_info mtd;
+	const char *dev_type_name;
+	const char *type_name;
+	char name[IFNAMSIZ + 20];
+};
+
 /**
  * struct efx_nic_type - Efx device type definition
  * @mem_map_size: Get memory BAR mapped size
@@ -1047,6 +1055,15 @@ static inline unsigned int efx_port_num(struct efx_nic *efx)
  * @filter_rfs_expire_one: Consider expiring a filter inserted for RFS.
  *	This must check whether the specified table entry is used by RFS
  *	and that rps_may_expire_flow() returns true for it.
+ * @mtd_probe: Probe and add MTD partitions associated with this net device,
+ *	 using efx_mtd_add()
+ * @mtd_rename: Set an MTD partition name using the net device name
+ * @mtd_read: Read from an MTD partition
+ * @mtd_erase: Erase part of an MTD partition
+ * @mtd_write: Write to an MTD partition
+ * @mtd_sync: Wait for write-back to complete on MTD partition.  This
+ *	also notifies the driver that a writer has finished using this
+ *	partition.
  * @revision: Hardware architecture revision
  * @txd_ptr_tbl_base: TX descriptor ring base address
  * @rxd_ptr_tbl_base: RX descriptor ring base address
@@ -1150,6 +1167,16 @@ struct efx_nic_type {
 	bool (*filter_rfs_expire_one)(struct efx_nic *efx, u32 flow_id,
 				      unsigned int index);
 #endif
+#ifdef CONFIG_SFC_MTD
+	int (*mtd_probe)(struct efx_nic *efx);
+	void (*mtd_rename)(struct efx_mtd_partition *part);
+	int (*mtd_read)(struct mtd_info *mtd, loff_t start, size_t len,
+			size_t *retlen, u8 *buffer);
+	int (*mtd_erase)(struct mtd_info *mtd, loff_t start, size_t len);
+	int (*mtd_write)(struct mtd_info *mtd, loff_t start, size_t len,
+			 size_t *retlen, const u8 *buffer);
+	int (*mtd_sync)(struct mtd_info *mtd);
+#endif
 
 	int revision;
 	unsigned int txd_ptr_tbl_base;

drivers/net/ethernet/sfc/nic.h

@@ -16,7 +16,6 @@
 #include "net_driver.h"
 #include "efx.h"
 #include "mcdi.h"
-#include "spi.h"
 
 /*
  * Falcon hardware control
@@ -163,6 +162,38 @@ struct falcon_board {
 	struct i2c_client *hwmon_client, *ioexp_client;
 };
 
+/**
+ * struct falcon_spi_device - a Falcon SPI (Serial Peripheral Interface) device
+ * @device_id:		Controller's id for the device
+ * @size:		Size (in bytes)
+ * @addr_len:		Number of address bytes in read/write commands
+ * @munge_address:	Flag whether addresses should be munged.
+ *	Some devices with 9-bit addresses (e.g. AT25040A EEPROM)
+ *	use bit 3 of the command byte as address bit A8, rather
+ *	than having a two-byte address.  If this flag is set, then
+ *	commands should be munged in this way.
+ * @erase_command:	Erase command (or 0 if sector erase not needed).
+ * @erase_size:		Erase sector size (in bytes)
+ *	Erase commands affect sectors with this size and alignment.
+ *	This must be a power of two.
+ * @block_size:		Write block size (in bytes).
+ *	Write commands are limited to blocks with this size and alignment.
+ */
+struct falcon_spi_device {
+	int device_id;
+	unsigned int size;
+	unsigned int addr_len;
+	unsigned int munge_address:1;
+	u8 erase_command;
+	unsigned int erase_size;
+	unsigned int block_size;
+};
+
+static inline bool falcon_spi_present(const struct falcon_spi_device *spi)
+{
+	return spi->size != 0;
+}
+
 /**
  * struct falcon_nic_data - Falcon NIC state
  * @pci_dev2: Secondary function of Falcon A

drivers/net/ethernet/sfc/siena.c

@@ -18,7 +18,6 @@
 #include "bitfield.h"
 #include "efx.h"
 #include "nic.h"
-#include "spi.h"
 #include "farch_regs.h"
 #include "io.h"
 #include "phy.h"
@@ -672,6 +671,138 @@ static int siena_mcdi_poll_reboot(struct efx_nic *efx)
 		return -EIO;
 }
 
+/**************************************************************************
+ *
+ * MTD
+ *
+ **************************************************************************
+ */
+
+#ifdef CONFIG_SFC_MTD
+
+struct siena_nvram_type_info {
+	int port;
+	const char *name;
+};
+
+static const struct siena_nvram_type_info siena_nvram_types[] = {
+	[MC_CMD_NVRAM_TYPE_DISABLED_CALLISTO]	= { 0, "sfc_dummy_phy" },
+	[MC_CMD_NVRAM_TYPE_MC_FW]		= { 0, "sfc_mcfw" },
+	[MC_CMD_NVRAM_TYPE_MC_FW_BACKUP]	= { 0, "sfc_mcfw_backup" },
+	[MC_CMD_NVRAM_TYPE_STATIC_CFG_PORT0]	= { 0, "sfc_static_cfg" },
+	[MC_CMD_NVRAM_TYPE_STATIC_CFG_PORT1]	= { 1, "sfc_static_cfg" },
+	[MC_CMD_NVRAM_TYPE_DYNAMIC_CFG_PORT0]	= { 0, "sfc_dynamic_cfg" },
+	[MC_CMD_NVRAM_TYPE_DYNAMIC_CFG_PORT1]	= { 1, "sfc_dynamic_cfg" },
+	[MC_CMD_NVRAM_TYPE_EXP_ROM]		= { 0, "sfc_exp_rom" },
+	[MC_CMD_NVRAM_TYPE_EXP_ROM_CFG_PORT0]	= { 0, "sfc_exp_rom_cfg" },
+	[MC_CMD_NVRAM_TYPE_EXP_ROM_CFG_PORT1]	= { 1, "sfc_exp_rom_cfg" },
+	[MC_CMD_NVRAM_TYPE_PHY_PORT0]		= { 0, "sfc_phy_fw" },
+	[MC_CMD_NVRAM_TYPE_PHY_PORT1]		= { 1, "sfc_phy_fw" },
+	[MC_CMD_NVRAM_TYPE_FPGA]		= { 0, "sfc_fpga" },
+};
+
+static int siena_mtd_probe_partition(struct efx_nic *efx,
+				     struct efx_mcdi_mtd_partition *part,
+				     unsigned int type)
+{
+	const struct siena_nvram_type_info *info;
+	size_t size, erase_size;
+	bool protected;
+	int rc;
+
+	if (type >= ARRAY_SIZE(siena_nvram_types) ||
+	    siena_nvram_types[type].name == NULL)
+		return -ENODEV;
+
+	info = &siena_nvram_types[type];
+
+	if (info->port != efx_port_num(efx))
+		return -ENODEV;
+
+	rc = efx_mcdi_nvram_info(efx, type, &size, &erase_size, &protected);
+	if (rc)
+		return rc;
+	if (protected)
+		return -ENODEV; /* hide it */
+
+	part->nvram_type = type;
+	part->common.dev_type_name = "Siena NVRAM manager";
+	part->common.type_name = info->name;
+
+	part->common.mtd.type = MTD_NORFLASH;
+	part->common.mtd.flags = MTD_CAP_NORFLASH;
+	part->common.mtd.size = size;
+	part->common.mtd.erasesize = erase_size;
+
+	return 0;
+}
+
+static int siena_mtd_get_fw_subtypes(struct efx_nic *efx,
+				     struct efx_mcdi_mtd_partition *parts,
+				     size_t n_parts)
+{
+	uint16_t fw_subtype_list[
+		MC_CMD_GET_BOARD_CFG_OUT_FW_SUBTYPE_LIST_MAXNUM];
+	size_t i;
+	int rc;
+
+	rc = efx_mcdi_get_board_cfg(efx, NULL, fw_subtype_list, NULL);
+	if (rc)
+		return rc;
+
+	for (i = 0; i < n_parts; i++)
+		parts[i].fw_subtype = fw_subtype_list[parts[i].nvram_type];
+
+	return 0;
+}
+
+static int siena_mtd_probe(struct efx_nic *efx)
+{
+	struct efx_mcdi_mtd_partition *parts;
+	u32 nvram_types;
+	unsigned int type;
+	size_t n_parts;
+	int rc;
+
+	ASSERT_RTNL();
+
+	rc = efx_mcdi_nvram_types(efx, &nvram_types);
+	if (rc)
+		return rc;
+
+	parts = kcalloc(hweight32(nvram_types), sizeof(*parts), GFP_KERNEL);
+	if (!parts)
+		return -ENOMEM;
+
+	type = 0;
+	n_parts = 0;
+
+	while (nvram_types != 0) {
+		if (nvram_types & 1) {
+			rc = siena_mtd_probe_partition(efx, &parts[n_parts],
+						       type);
+			if (rc == 0)
+				n_parts++;
+			else if (rc != -ENODEV)
+				goto fail;
+		}
+		type++;
+		nvram_types >>= 1;
+	}
+
+	rc = siena_mtd_get_fw_subtypes(efx, parts, n_parts);
+	if (rc)
+		goto fail;
+
+	rc = efx_mtd_add(efx, &parts[0].common, n_parts, sizeof(*parts));
+fail:
+	if (rc)
+		kfree(parts);
+	return rc;
+}
+
+#endif /* CONFIG_SFC_MTD */
+
 /**************************************************************************
  *
  * Revision-dependent attributes used by efx.c and nic.c
@@ -753,6 +884,14 @@ const struct efx_nic_type siena_a0_nic_type = {
 	.filter_rfs_insert = efx_farch_filter_rfs_insert,
 	.filter_rfs_expire_one = efx_farch_filter_rfs_expire_one,
 #endif
+#ifdef CONFIG_SFC_MTD
+	.mtd_probe = siena_mtd_probe,
+	.mtd_rename = efx_mcdi_mtd_rename,
+	.mtd_read = efx_mcdi_mtd_read,
+	.mtd_erase = efx_mcdi_mtd_erase,
+	.mtd_write = efx_mcdi_mtd_write,
+	.mtd_sync = efx_mcdi_mtd_sync,
+#endif
 
 	.revision = EFX_REV_SIENA_A0,
 	.txd_ptr_tbl_base = FR_BZ_TX_DESC_PTR_TBL,

drivers/net/ethernet/sfc/spi.h

-/****************************************************************************
- * Driver for Solarflare Solarstorm network controllers and boards
- * Copyright 2005 Fen Systems Ltd.
- * Copyright 2006-2010 Solarflare Communications Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published
- * by the Free Software Foundation, incorporated herein by reference.
- */
-
-#ifndef EFX_SPI_H
-#define EFX_SPI_H
-
-#include "net_driver.h"
-
-/**************************************************************************
- *
- * Basic SPI command set and bit definitions
- *
- *************************************************************************/
-
-#define SPI_WRSR 0x01		/* Write status register */
-#define SPI_WRITE 0x02		/* Write data to memory array */
-#define SPI_READ 0x03		/* Read data from memory array */
-#define SPI_WRDI 0x04		/* Reset write enable latch */
-#define SPI_RDSR 0x05		/* Read status register */
-#define SPI_WREN 0x06		/* Set write enable latch */
-#define SPI_SST_EWSR 0x50	/* SST: Enable write to status register */
-
-#define SPI_STATUS_WPEN 0x80	/* Write-protect pin enabled */
-#define SPI_STATUS_BP2 0x10	/* Block protection bit 2 */
-#define SPI_STATUS_BP1 0x08	/* Block protection bit 1 */
-#define SPI_STATUS_BP0 0x04	/* Block protection bit 0 */
-#define SPI_STATUS_WEN 0x02	/* State of the write enable latch */
-#define SPI_STATUS_NRDY 0x01	/* Device busy flag */
-
-/**
- * struct falcon_spi_device - a Falcon SPI (Serial Peripheral Interface) device
- * @device_id:		Controller's id for the device
- * @size:		Size (in bytes)
- * @addr_len:		Number of address bytes in read/write commands
- * @munge_address:	Flag whether addresses should be munged.
- *	Some devices with 9-bit addresses (e.g. AT25040A EEPROM)
- *	use bit 3 of the command byte as address bit A8, rather
- *	than having a two-byte address.  If this flag is set, then
- *	commands should be munged in this way.
- * @erase_command:	Erase command (or 0 if sector erase not needed).
- * @erase_size:		Erase sector size (in bytes)
- *	Erase commands affect sectors with this size and alignment.
- *	This must be a power of two.
- * @block_size:		Write block size (in bytes).
- *	Write commands are limited to blocks with this size and alignment.
- */
-struct falcon_spi_device {
-	int device_id;
-	unsigned int size;
-	unsigned int addr_len;
-	unsigned int munge_address:1;
-	u8 erase_command;
-	unsigned int erase_size;
-	unsigned int block_size;
-};
-
-static inline bool falcon_spi_present(const struct falcon_spi_device *spi)
-{
-	return spi->size != 0;
-}
-
-int falcon_spi_cmd(struct efx_nic *efx,
-		   const struct falcon_spi_device *spi, unsigned int command,
-		   int address, const void *in, void *out, size_t len);
-int falcon_spi_wait_write(struct efx_nic *efx,
-			  const struct falcon_spi_device *spi);
-int falcon_spi_read(struct efx_nic *efx,
-		    const struct falcon_spi_device *spi, loff_t start,
-		    size_t len, size_t *retlen, u8 *buffer);
-int falcon_spi_write(struct efx_nic *efx,
-		     const struct falcon_spi_device *spi, loff_t start,
-		     size_t len, size_t *retlen, const u8 *buffer);
-
-/*
- * SFC4000 flash is partitioned into:
- *     0-0x400       chip and board config (see falcon_hwdefs.h)
- *     0x400-0x8000  unused (or may contain VPD if EEPROM not present)
- *     0x8000-end    boot code (mapped to PCI expansion ROM)
- * SFC4000 small EEPROM (size < 0x400) is used for VPD only.
- * SFC4000 large EEPROM (size >= 0x400) is partitioned into:
- *     0-0x400       chip and board config
- *     configurable  VPD
- *     0x800-0x1800  boot config
- * Aside from the chip and board config, all of these are optional and may
- * be absent or truncated depending on the devices used.
- */
-#define FALCON_NVCONFIG_END 0x400U
-#define FALCON_FLASH_BOOTCODE_START 0x8000U
-#define FALCON_EEPROM_BOOTCONFIG_START 0x800U
-#define FALCON_EEPROM_BOOTCONFIG_END 0x1800U
-
-#endif /* EFX_SPI_H */