iwlwifi: Support for uCode without init and bsm section

This patch enables loading fw w/o init and bsm section. It also provides
general cleanup of the rutine.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 56 insertions, 64 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl3945-base.c b/drivers/net/wireless/iwlwifi/iwl3945-base.c
index 76186f85c13..4fa85d874ef 100644
--- a/drivers/net/wireless/iwlwifi/iwl3945-base.c
+++ b/drivers/net/wireless/iwlwifi/iwl3945-base.c
@@ -5767,6 +5767,12 @@ static void iwl3945_nic_start(struct iwl3945_priv *priv)
 	iwl3945_write32(priv, CSR_RESET, 0);
 }
 
+static int iwl3945_alloc_fw_desc(struct pci_dev *pci_dev, struct fw_desc *desc)
+{
+	desc->v_addr = pci_alloc_consistent(pci_dev, desc->len, &desc->p_addr);
+	return (desc->v_addr != NULL) ? 0 : -ENOMEM;
+}
+
 /**
  * iwl3945_read_ucode - Read uCode images from disk file.
  *
@@ -5775,7 +5781,7 @@ static void iwl3945_nic_start(struct iwl3945_priv *priv)
 static int iwl3945_read_ucode(struct iwl3945_priv *priv)
 {
 	struct iwl3945_ucode *ucode;
-	int rc = 0;
+	int ret = 0;
 	const struct firmware *ucode_raw;
 	/* firmware file name contains uCode/driver compatibility version */
 	const char *name = "iwlwifi-3945" IWL3945_UCODE_API ".ucode";
@@ -5785,9 +5791,10 @@ static int iwl3945_read_ucode(struct iwl3945_priv *priv)
 
 	/* Ask kernel firmware_class module to get the boot firmware off disk.
 	 * request_firmware() is synchronous, file is in memory on return. */
-	rc = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
-	if (rc < 0) {
-		IWL_ERROR("%s firmware file req failed: Reason %d\n", name, rc);
+	ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
+	if (ret < 0) {
+		IWL_ERROR("%s firmware file req failed: Reason %d\n",
+				name, ret);
 		goto error;
 	}
 
@@ -5797,7 +5804,7 @@ static int iwl3945_read_ucode(struct iwl3945_priv *priv)
 	/* Make sure that we got at least our header! */
 	if (ucode_raw->size < sizeof(*ucode)) {
 		IWL_ERROR("File size way too small!\n");
-		rc = -EINVAL;
+		ret = -EINVAL;
 		goto err_release;
 	}
 
@@ -5825,43 +5832,40 @@ static int iwl3945_read_ucode(struct iwl3945_priv *priv)
 
 		IWL_DEBUG_INFO("uCode file size %d too small\n",
 			       (int)ucode_raw->size);
-		rc = -EINVAL;
+		ret = -EINVAL;
 		goto err_release;
 	}
 
 	/* Verify that uCode images will fit in card's SRAM */
 	if (inst_size > IWL_MAX_INST_SIZE) {
-		IWL_DEBUG_INFO("uCode instr len %d too large to fit in card\n",
-			       (int)inst_size);
-		rc = -EINVAL;
+		IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
+			       inst_size);
+		ret = -EINVAL;
 		goto err_release;
 	}
 
 	if (data_size > IWL_MAX_DATA_SIZE) {
-		IWL_DEBUG_INFO("uCode data len %d too large to fit in card\n",
-			       (int)data_size);
-		rc = -EINVAL;
+		IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
+			       data_size);
+		ret = -EINVAL;
 		goto err_release;
 	}
 	if (init_size > IWL_MAX_INST_SIZE) {
-		IWL_DEBUG_INFO
-		    ("uCode init instr len %d too large to fit in card\n",
-		     (int)init_size);
-		rc = -EINVAL;
+		IWL_DEBUG_INFO("uCode init instr len %d too large to fit in\n",
+				init_size);
+		ret = -EINVAL;
 		goto err_release;
 	}
 	if (init_data_size > IWL_MAX_DATA_SIZE) {
-		IWL_DEBUG_INFO
-		    ("uCode init data len %d too large to fit in card\n",
-		     (int)init_data_size);
-		rc = -EINVAL;
+		IWL_DEBUG_INFO("uCode init data len %d too large to fit in\n",
+				init_data_size);
+		ret = -EINVAL;
 		goto err_release;
 	}
 	if (boot_size > IWL_MAX_BSM_SIZE) {
-		IWL_DEBUG_INFO
-		    ("uCode boot instr len %d too large to fit in bsm\n",
-		     (int)boot_size);
-		rc = -EINVAL;
+		IWL_DEBUG_INFO("uCode boot instr len %d too large to fit in\n",
+				boot_size);
+		ret = -EINVAL;
 		goto err_release;
 	}
 
@@ -5871,56 +5875,45 @@ static int iwl3945_read_ucode(struct iwl3945_priv *priv)
 	 * 1) unmodified from disk
 	 * 2) backup cache for save/restore during power-downs */
 	priv->ucode_code.len = inst_size;
-	priv->ucode_code.v_addr =
-	    pci_alloc_consistent(priv->pci_dev,
-				 priv->ucode_code.len,
-				 &(priv->ucode_code.p_addr));
+	iwl3945_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
 
 	priv->ucode_data.len = data_size;
-	priv->ucode_data.v_addr =
-	    pci_alloc_consistent(priv->pci_dev,
-				 priv->ucode_data.len,
-				 &(priv->ucode_data.p_addr));
+	iwl3945_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
 
 	priv->ucode_data_backup.len = data_size;
-	priv->ucode_data_backup.v_addr =
-	    pci_alloc_consistent(priv->pci_dev,
-				 priv->ucode_data_backup.len,
-				 &(priv->ucode_data_backup.p_addr));
+	iwl3945_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
 
+	if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
+	    !priv->ucode_data_backup.v_addr)
+		goto err_pci_alloc;
 
 	/* Initialization instructions and data */
-	priv->ucode_init.len = init_size;
-	priv->ucode_init.v_addr =
-	    pci_alloc_consistent(priv->pci_dev,
-				 priv->ucode_init.len,
-				 &(priv->ucode_init.p_addr));
-
-	priv->ucode_init_data.len = init_data_size;
-	priv->ucode_init_data.v_addr =
-	    pci_alloc_consistent(priv->pci_dev,
-				 priv->ucode_init_data.len,
-				 &(priv->ucode_init_data.p_addr));
+	if (init_size && init_data_size) {
+		priv->ucode_init.len = init_size;
+		iwl3945_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
+
+		priv->ucode_init_data.len = init_data_size;
+		iwl3945_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
+
+		if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
+			goto err_pci_alloc;
+	}
 
 	/* Bootstrap (instructions only, no data) */
-	priv->ucode_boot.len = boot_size;
-	priv->ucode_boot.v_addr =
-	    pci_alloc_consistent(priv->pci_dev,
-				 priv->ucode_boot.len,
-				 &(priv->ucode_boot.p_addr));
+	if (boot_size) {
+		priv->ucode_boot.len = boot_size;
+		iwl3945_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
 
-	if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
-	    !priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr ||
-	    !priv->ucode_boot.v_addr || !priv->ucode_data_backup.v_addr)
-		goto err_pci_alloc;
+		if (!priv->ucode_boot.v_addr)
+			goto err_pci_alloc;
+	}
 
 	/* Copy images into buffers for card's bus-master reads ... */
 
 	/* Runtime instructions (first block of data in file) */
 	src = &ucode->data[0];
 	len = priv->ucode_code.len;
-	IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %d\n",
-		       (int)len);
+	IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
 	memcpy(priv->ucode_code.v_addr, src, len);
 	IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
 		priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
@@ -5929,8 +5922,7 @@ static int iwl3945_read_ucode(struct iwl3945_priv *priv)
 	 * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
 	src = &ucode->data[inst_size];
 	len = priv->ucode_data.len;
-	IWL_DEBUG_INFO("Copying (but not loading) uCode data len %d\n",
-		       (int)len);
+	IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
 	memcpy(priv->ucode_data.v_addr, src, len);
 	memcpy(priv->ucode_data_backup.v_addr, src, len);
 
@@ -5938,8 +5930,8 @@ static int iwl3945_read_ucode(struct iwl3945_priv *priv)
 	if (init_size) {
 		src = &ucode->data[inst_size + data_size];
 		len = priv->ucode_init.len;
-		IWL_DEBUG_INFO("Copying (but not loading) init instr len %d\n",
-			       (int)len);
+		IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
+			       len);
 		memcpy(priv->ucode_init.v_addr, src, len);
 	}
 
@@ -5965,14 +5957,14 @@ static int iwl3945_read_ucode(struct iwl3945_priv *priv)
 
  err_pci_alloc:
 	IWL_ERROR("failed to allocate pci memory\n");
-	rc = -ENOMEM;
+	ret = -ENOMEM;
 	iwl3945_dealloc_ucode_pci(priv);
 
  err_release:
 	release_firmware(ucode_raw);
 
  error:
-	return rc;
+	return ret;
 }